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B6-hMASP2
Product ID:
C001592
Strain:
C57BL/6NCya
Status:
Description:
The MASP2 gene encodes MASP-2, a serum serine protease that serves as a key mediator in complement system activation. MASP-2 initiates the lectin pathway by forming complexes with pattern recognition molecules such as mannose-binding lectin (MBL) and ficolins. Upon pathogen recognition by MBL, MASP-2 is activated and subsequently cleaves complement components C4 and C2, leading to the generation of C3 convertase and triggering downstream complement activation. Beyond its role in the complement cascade, MASP-2 also contributes to the coagulation pathway by cleaving prothrombin to generate thrombin, thereby linking innate immunity and hemostasis [1]. Emerging evidence highlights the clinical significance of MASP2 gene polymorphisms, which are associated with altered susceptibility to infectious diseases and immune-related disorders. Reduced plasma levels of MASP-2 have been linked to increased vulnerability to HIV infection, while elevated MASP-2 activity may exacerbate inflammatory responses [2]. Given its pivotal role in immune regulation, MASP-2 has emerged as a promising therapeutic target. Inhibition of MASP-2 is currently under investigation as a potential strategy for treating a range of conditions, including IgA nephropathy (IgAN) [3], atypical hemolytic uremic syndrome (aHUS), and transplant-associated thrombotic microangiopathy (TA-TMA) [4].
The B6-hMASP2 mouse model, generated through precise gene editing technology, features the in situ replacement of part of the endogenous mouse Masp2 gene with the coding sequence (CDS) of human MASP2. Homozygous B6-hMASP2 mice are viable and fertile, providing a robust platform for studying the pathophysiology of autoimmune and infectious diseases. This model also serves as a valuable tool for the development and preclinical evaluation of MASP-2-targeted therapeutics, offering insights into both mechanistic and translational aspects of complement-mediated diseases.
The MASP2 gene encodes MASP-2, a serum serine protease that serves as a key mediator in complement system activation. MASP-2 initiates the lectin pathway by forming complexes with pattern recognition molecules such as mannose-binding lectin (MBL) and ficolins. Upon pathogen recognition by MBL, MASP-2 is activated and subsequently cleaves complement components C4 and C2, leading to the generation of C3 convertase and triggering downstream complement activation. Beyond its role in the complement cascade, MASP-2 also contributes to the coagulation pathway by cleaving prothrombin to generate thrombin, thereby linking innate immunity and hemostasis [1]. Emerging evidence highlights the clinical significance of MASP2 gene polymorphisms, which are associated with altered susceptibility to infectious diseases and immune-related disorders. Reduced plasma levels of MASP-2 have been linked to increased vulnerability to HIV infection, while elevated MASP-2 activity may exacerbate inflammatory responses [2]. Given its pivotal role in immune regulation, MASP-2 has emerged as a promising therapeutic target. Inhibition of MASP-2 is currently under investigation as a potential strategy for treating a range of conditions, including IgA nephropathy (IgAN) [3], atypical hemolytic uremic syndrome (aHUS), and transplant-associated thrombotic microangiopathy (TA-TMA) [4].
The B6-hMASP2 mouse model, generated through precise gene editing technology, features the in situ replacement of part of the endogenous mouse Masp2 gene with the coding sequence (CDS) of human MASP2. Homozygous B6-hMASP2 mice are viable and fertile, providing a robust platform for studying the pathophysiology of autoimmune and infectious diseases. This model also serves as a valuable tool for the development and preclinical evaluation of MASP-2-targeted therapeutics, offering insights into both mechanistic and translational aspects of complement-mediated diseases.
B6-hBAFFR (hTNFRSF13C)
Product ID:
C001711
Strain:
C57BL/6NCya
Status:
Description:
The gene TNFRSF13C encodes the B cell-activating factor receptor (BAFF-R), also known as BLyS receptor 3 (BR3) or CD268. As a member of the tumor necrosis factor receptor superfamily (TNFRSF), BAFF-R functions as a crucial type III transmembrane signaling protein on lymphocytes. Its expression is predominantly observed on the surface of B cells throughout various stages of their development, from transitional to mature naive and memory populations, underscoring its vital role in peripheral B cell homeostasis [1]. BAFF-R serves as the primary receptor for the cytokine BAFF (TNFSF13B), and their interaction delivers essential survival and maturation signals to B cells, mediated through downstream pathways including the activation of NF-κB and PI3K. Genetic alterations in TNFRSF13C, including point mutations and deletions, or dysregulation of the BAFF-BAFF-R axis, are increasingly recognized for their contribution to immune pathology [2]. Such aberrations are associated with primary immunodeficiencies like common variable immunodeficiency (CVID), characterized by profound defects in antibody production and recurrent infections, as well as a range of autoimmune diseases such as systemic lupus erythematosus (SLE) and Sjögren's syndrome, and certain B cell malignancies [2-3]. The critical, non-redundant function of BAFF-R in B cell biology highlights its significance as a key node in adaptive immunity and positions the BAFF-BAFF-R pathway as a compelling target for therapeutic intervention in a spectrum of immune-mediated disorders.
The B6-hBAFFR (hTNFRSF13C) mouse is a humanized model constructed by replacing the sequence of the mouse Tnfrsf13c endogenous extracellular domain in situ with the corresponding extracellular domain from the human TNFRSF13C. The B6-hBAFFR (hTNFRSF13C) mice can be used for the study of the pathogenesis of immune-mediated disorders such as common variable immunodeficiency (CVID), systemic lupus erythematosus (SLE), and Sjögren's syndrome, and certain B cell malignancies, as well as for TNFRSF13C-targeted drug development.
The gene TNFRSF13C encodes the B cell-activating factor receptor (BAFF-R), also known as BLyS receptor 3 (BR3) or CD268. As a member of the tumor necrosis factor receptor superfamily (TNFRSF), BAFF-R functions as a crucial type III transmembrane signaling protein on lymphocytes. Its expression is predominantly observed on the surface of B cells throughout various stages of their development, from transitional to mature naive and memory populations, underscoring its vital role in peripheral B cell homeostasis [1]. BAFF-R serves as the primary receptor for the cytokine BAFF (TNFSF13B), and their interaction delivers essential survival and maturation signals to B cells, mediated through downstream pathways including the activation of NF-κB and PI3K. Genetic alterations in TNFRSF13C, including point mutations and deletions, or dysregulation of the BAFF-BAFF-R axis, are increasingly recognized for their contribution to immune pathology [2]. Such aberrations are associated with primary immunodeficiencies like common variable immunodeficiency (CVID), characterized by profound defects in antibody production and recurrent infections, as well as a range of autoimmune diseases such as systemic lupus erythematosus (SLE) and Sjögren's syndrome, and certain B cell malignancies [2-3]. The critical, non-redundant function of BAFF-R in B cell biology highlights its significance as a key node in adaptive immunity and positions the BAFF-BAFF-R pathway as a compelling target for therapeutic intervention in a spectrum of immune-mediated disorders.
The B6-hBAFFR (hTNFRSF13C) mouse is a humanized model constructed by replacing the sequence of the mouse Tnfrsf13c endogenous extracellular domain in situ with the corresponding extracellular domain from the human TNFRSF13C. The B6-hBAFFR (hTNFRSF13C) mice can be used for the study of the pathogenesis of immune-mediated disorders such as common variable immunodeficiency (CVID), systemic lupus erythematosus (SLE), and Sjögren's syndrome, and certain B cell malignancies, as well as for TNFRSF13C-targeted drug development.
B6-hCD47
Product ID:
C001419
Strain:
C57BL/6JCya
Status:
Description:
CD47, also known as Integrin Associated Protein (IAP), is a transmembrane protein that belongs to the immunoglobulin superfamily. It is widely expressed on the surface of almost all normal cells and is highly expressed in tumor cells [1].
SIRPα, a signal regulatory protein mainly expressed on macrophages, inhibits their phagocytosis of target cells by transmitting inhibitory signals when binding to CD47 on other cells. However, some tumor cells can evade phagocytosis and cause tumor immune escape by highly expressing CD47 and binding to SIRPα on macrophages, sending a “don’t eat me” signal. Targeting CD47 antibodies can initiate anti-tumor T cell immune responses and promote cancer-specific lymphocyte activation through macrophage-mediated phagocytosis of tumors. As a result, the CD47-SIRPα signaling pathway has great therapeutic potential and is a highly competitive target in tumor immunotherapy after PD-1/PD-L1 [1-2].
CD47 is a transmembrane protein with its extracellular domain serving as the receptor/ligand binding region and its intracellular domain responsible for signal transduction [3]. B6-hCD47 mice are obtained by replacing the fragment encoding the extracellular domain of CD47 protein in the mouse Cd47 gene with the corresponding human CD47 gene sequence, resulting in a model expressing the extracellular domain of human CD47 protein and the intracellular domain of mouse CD47 protein. This ensures normal binding with human antibodies and other protein drugs while completely retaining the intracellular part of mouse CD47 protein, maintaining normal intracellular signal transduction. B6-hCD47 mice can successfully express human CD47 protein and can be used for research on CD47-targeted inhibitors or antibody drug development and screening, pharmacology and safety evaluation, tumor immunotherapy evaluation, and mechanisms of tumor immune escape systems.
CD47, also known as Integrin Associated Protein (IAP), is a transmembrane protein that belongs to the immunoglobulin superfamily. It is widely expressed on the surface of almost all normal cells and is highly expressed in tumor cells [1].
SIRPα, a signal regulatory protein mainly expressed on macrophages, inhibits their phagocytosis of target cells by transmitting inhibitory signals when binding to CD47 on other cells. However, some tumor cells can evade phagocytosis and cause tumor immune escape by highly expressing CD47 and binding to SIRPα on macrophages, sending a “don’t eat me” signal. Targeting CD47 antibodies can initiate anti-tumor T cell immune responses and promote cancer-specific lymphocyte activation through macrophage-mediated phagocytosis of tumors. As a result, the CD47-SIRPα signaling pathway has great therapeutic potential and is a highly competitive target in tumor immunotherapy after PD-1/PD-L1 [1-2].
CD47 is a transmembrane protein with its extracellular domain serving as the receptor/ligand binding region and its intracellular domain responsible for signal transduction [3]. B6-hCD47 mice are obtained by replacing the fragment encoding the extracellular domain of CD47 protein in the mouse Cd47 gene with the corresponding human CD47 gene sequence, resulting in a model expressing the extracellular domain of human CD47 protein and the intracellular domain of mouse CD47 protein. This ensures normal binding with human antibodies and other protein drugs while completely retaining the intracellular part of mouse CD47 protein, maintaining normal intracellular signal transduction. B6-hCD47 mice can successfully express human CD47 protein and can be used for research on CD47-targeted inhibitors or antibody drug development and screening, pharmacology and safety evaluation, tumor immunotherapy evaluation, and mechanisms of tumor immune escape systems.
B6-hFCGR1
Product ID:
C001500
Strain:
C57BL/6NCya
Status:
Description:
FCGR1 gene encodes FcγRI, a specific receptor for IgG antibodies, also known as CD64. This receptor plays a key role in human immune responses. FcγRI has a high affinity for the Fc portion of IgG antibodies and is the only member of the human FcγRs with a high affinity for monomeric IgG. It plays important roles in both innate and adaptive immune responses [1]. FcγRI is expressed on a variety of immune cells, including monocytes, macrophages, dendritic cells, and neutrophils. It plays a critical role in host defense against infection and humoral immunity by influencing processes such as phagocytosis, antibody-dependent cell-mediated cytotoxicity (ADCC), and antigen presentation [2-3]. The binding of FcγRI to IgG-coated target cells promotes their phagocytosis by immune cells. This is an important mechanism for clearing infected cells, apoptotic cells, and other foreign particles. In addition, this binding can also promote the release of cytotoxic granules by immune cells, such as natural killer cells and cytotoxic T cells, leading to the killing and lysis of target cells. In antigen presentation, FcγRI binding to IgG-coated antigens promotes dendritic cells to take them up and present them to T cells, which is essential for the initiation of adaptive immune responses. In addition, FcγRI is involved in a variety of important physiological processes, such as wound healing and inflammation. FcγRI plays a critical role in antibody-based immunotherapy, which has important implications for the development of therapeutic drugs and methods for a variety of autoimmune diseases, infectious diseases, and tumors [4-5].
This model represents a humanized FCGR1 mouse, generated by substituting the mouse Fcgr1 gene sequence (inclusive of the UTR) with the corresponding human FCGR1 gene sequence. This modification enables the expression of human FcγRI in mice. Homozygous B6-hFCGR1 mice exclusively express human FcγRI receptors, with the proportion of cells expressing human FcγRI mirroring that of cells expressing mouse FcγRI in wild-type mice. Consequently, this model serves as a valuable tool for various research areas, including the evaluation of human IgG antibody affinity, exploration of the ADCC mechanism, investigation into immune cell phagocytosis and antigen presentation. Furthermore, it provides a platform for the preclinical assessment of therapeutic human IgG antibodies.
FCGR1 gene encodes FcγRI, a specific receptor for IgG antibodies, also known as CD64. This receptor plays a key role in human immune responses. FcγRI has a high affinity for the Fc portion of IgG antibodies and is the only member of the human FcγRs with a high affinity for monomeric IgG. It plays important roles in both innate and adaptive immune responses [1]. FcγRI is expressed on a variety of immune cells, including monocytes, macrophages, dendritic cells, and neutrophils. It plays a critical role in host defense against infection and humoral immunity by influencing processes such as phagocytosis, antibody-dependent cell-mediated cytotoxicity (ADCC), and antigen presentation [2-3]. The binding of FcγRI to IgG-coated target cells promotes their phagocytosis by immune cells. This is an important mechanism for clearing infected cells, apoptotic cells, and other foreign particles. In addition, this binding can also promote the release of cytotoxic granules by immune cells, such as natural killer cells and cytotoxic T cells, leading to the killing and lysis of target cells. In antigen presentation, FcγRI binding to IgG-coated antigens promotes dendritic cells to take them up and present them to T cells, which is essential for the initiation of adaptive immune responses. In addition, FcγRI is involved in a variety of important physiological processes, such as wound healing and inflammation. FcγRI plays a critical role in antibody-based immunotherapy, which has important implications for the development of therapeutic drugs and methods for a variety of autoimmune diseases, infectious diseases, and tumors [4-5].
This model represents a humanized FCGR1 mouse, generated by substituting the mouse Fcgr1 gene sequence (inclusive of the UTR) with the corresponding human FCGR1 gene sequence. This modification enables the expression of human FcγRI in mice. Homozygous B6-hFCGR1 mice exclusively express human FcγRI receptors, with the proportion of cells expressing human FcγRI mirroring that of cells expressing mouse FcγRI in wild-type mice. Consequently, this model serves as a valuable tool for various research areas, including the evaluation of human IgG antibody affinity, exploration of the ADCC mechanism, investigation into immune cell phagocytosis and antigen presentation. Furthermore, it provides a platform for the preclinical assessment of therapeutic human IgG antibodies.
B6-hB7-H3 (hCD276)
Product ID:
C001716
Strain:
C57BL/6NCya
Status:
Description:
The CD276 gene, also known as B7-H3, encodes a type I transmembrane glycoprotein that belongs to the B7 family of immune checkpoint regulators [1]. Characterized by its limited expression in most normal human tissues, CD276 is frequently observed to be upregulated in a diverse range of human malignancies and within their associated tumor microenvironments, as well as on specific immune cell populations including antigen-presenting cells [2]. The encoded protein functions as a context-dependent modulator of T cell responses, exhibiting both co-stimulatory and co-inhibitory activities that influence T cell activation, proliferation, and cytokine production [3]. Expressed on tumor cells, antigen-presenting cells, and endothelial cells within the tumor vasculature, aberrant expression of CD276 has been strongly implicated in promoting tumor progression, metastasis, and the evasion of anti-tumor immunity, thereby positioning it as a compelling target for therapeutic intervention in oncology [4].
The B6-hB7-H3 (hCD276) mouse is a humanized model constructed by replacing the sequence of the mouse Cd276 endogenous extracellular domain in situ with the corresponding extracellular domain from the human CD276. The murine signal peptide was preserved. The B6-hB7-H3 (hCD276) mice can be used for the study of the pathogenesis of various cancers such as breast cancer, glioblastoma, and non-small cell lung cancer, as well as for CD276-targeted drug development.
The CD276 gene, also known as B7-H3, encodes a type I transmembrane glycoprotein that belongs to the B7 family of immune checkpoint regulators [1]. Characterized by its limited expression in most normal human tissues, CD276 is frequently observed to be upregulated in a diverse range of human malignancies and within their associated tumor microenvironments, as well as on specific immune cell populations including antigen-presenting cells [2]. The encoded protein functions as a context-dependent modulator of T cell responses, exhibiting both co-stimulatory and co-inhibitory activities that influence T cell activation, proliferation, and cytokine production [3]. Expressed on tumor cells, antigen-presenting cells, and endothelial cells within the tumor vasculature, aberrant expression of CD276 has been strongly implicated in promoting tumor progression, metastasis, and the evasion of anti-tumor immunity, thereby positioning it as a compelling target for therapeutic intervention in oncology [4].
The B6-hB7-H3 (hCD276) mouse is a humanized model constructed by replacing the sequence of the mouse Cd276 endogenous extracellular domain in situ with the corresponding extracellular domain from the human CD276. The murine signal peptide was preserved. The B6-hB7-H3 (hCD276) mice can be used for the study of the pathogenesis of various cancers such as breast cancer, glioblastoma, and non-small cell lung cancer, as well as for CD276-targeted drug development.
BALB/c-hCD3
Product ID:
C001326
Strain:
BALB/cAnCya
Status:
Description:
Cluster of differentiation 3 (CD3) is a multimeric protein complex that is essential for T cell activation and antigen recognition. It consists of five different polypeptide chains (γ, δ, ε, ζ, and η) that are noncovalently associated with the T cell receptor (TCR). The TCR is responsible for recognizing antigens presented by antigen-presenting cells (APCs), while CD3 transduces the activation signal into the T cell and activates helper T-cells and cytotoxic T-cells [1-2]. The CD3-TCR complex is expressed on the surface of all mature T cells, and its assembly is required for T cell development and function. CD3 plays a crucial role in stabilizing the TCR and facilitating its interaction with antigens. It also recruits signaling molecules to the TCR, which initiates a cascade of events that leads to T cell activation. CD3 is a highly specific T cell marker, and its expression is increased upon T cell activation. This makes it a valuable tool for identifying and characterizing T cells in tissues and blood samples. CD3 staining is also used to diagnose T-cell lymphomas and leukemias. Due to its essential role in T cell activation, CD3 is a promising target for immunosuppressive therapy. Several anti-CD3 monoclonal antibodies have been developed and are being tested in clinical trials for the treatment of autoimmune diseases, such as type 1 diabetes and rheumatoid arthritis [3].
The BALB/c-hCD3 mice are a CD3 humanized model obtained by replacing the mouse CD3 coding gene with the human CD3 gene using embryonic stem (ES) cell targeting technology. This model can be used to study T cell activation and antigen recognition mechanisms and for the development of CD3-targeted drugs in immunosuppressive therapies for autoimmune diseases.
Cluster of differentiation 3 (CD3) is a multimeric protein complex that is essential for T cell activation and antigen recognition. It consists of five different polypeptide chains (γ, δ, ε, ζ, and η) that are noncovalently associated with the T cell receptor (TCR). The TCR is responsible for recognizing antigens presented by antigen-presenting cells (APCs), while CD3 transduces the activation signal into the T cell and activates helper T-cells and cytotoxic T-cells [1-2]. The CD3-TCR complex is expressed on the surface of all mature T cells, and its assembly is required for T cell development and function. CD3 plays a crucial role in stabilizing the TCR and facilitating its interaction with antigens. It also recruits signaling molecules to the TCR, which initiates a cascade of events that leads to T cell activation. CD3 is a highly specific T cell marker, and its expression is increased upon T cell activation. This makes it a valuable tool for identifying and characterizing T cells in tissues and blood samples. CD3 staining is also used to diagnose T-cell lymphomas and leukemias. Due to its essential role in T cell activation, CD3 is a promising target for immunosuppressive therapy. Several anti-CD3 monoclonal antibodies have been developed and are being tested in clinical trials for the treatment of autoimmune diseases, such as type 1 diabetes and rheumatoid arthritis [3].
The BALB/c-hCD3 mice are a CD3 humanized model obtained by replacing the mouse CD3 coding gene with the human CD3 gene using embryonic stem (ES) cell targeting technology. This model can be used to study T cell activation and antigen recognition mechanisms and for the development of CD3-targeted drugs in immunosuppressive therapies for autoimmune diseases.
B6-hPD-1/hVEGFA
Product ID:
C001598
Strain:
C57BL/6JCya
Status:
Description:
Programmed cell death protein 1 (PDCD1/PD-1) is a member of the B7-CD28 costimulatory receptor family. It is an inhibitory receptor expressed on activated T cells and plays a role in regulating the function of effector T cells, including CD8+ T cells, and promoting the differentiation of CD4+ T cells into regulatory T cells. PD-1 is expressed in a variety of tumors and plays an important role in antitumor immunity. In addition, PD-1 is involved in the defense against autoimmune diseases and has inhibitory effects on antitumor and antimicrobial immunity [1]. PD-1 binds to programmed death ligands 1 and 2 (PD-L1 and PD-L2) to inhibit T cell activation, reduce the production of corresponding cytokines, and regulate T cell survival [2]. Drugs targeting this pathway can reactivate T cells to activate antitumor immune responses [3].
The Vascular Endothelial Growth Factor (VEGF) family is a group of particular endothelial growth factors intimately associated with angiogenesis. These factors promote increased vascular permeability, extracellular matrix degeneration, vascular endothelial cell migration and proliferation, and are capable of stimulating angiogenesis and increasing the permeability of existing vessels. As such, they play a pivotal role in normal vascular development and wound healing. The VEGF family comprises VEGFA, VEGFB, VEGFC, VEGFD, VEGFE, and PLGF [4]. Of these, VEGFA is the most commonly targeted in research related to neovascular ophthalmic diseases due to its crucial role in the proliferation, migration, and formation of endothelial cell microvessels [5]. Overexpression of VEGFA in the eye can result in abnormal vascular growth and leakage, leading to various ophthalmic diseases such as Age-Related Macular Degeneration (AMD), Diabetic Retinopathy (DR), and corneal neovascularization [5-6]. The progression of solid tumors depends on vascularization and angiogenesis within malignant tissues, with VEGFA playing a crucial role among various pro-angiogenic factors. The VEGFA gene is upregulated in many known tumors, correlating with tumor staging and progression. Blocking VEGFA may lead to vascular network regression, inhibiting tumor growth [7]. Thus, VEGFA is an important target for anti-angiogenic cancer therapies.
The B6-hPD-1/hVEGFA mouse is a humanized model obtained by crossbreeding hPD-1 mice (Catalog No. C001524) with B6-hVEGFA mice (Catalog No. C001555). This model can be used for research in drug development, efficacy and safety evaluation, tumor immunotherapy evaluation, and immune system mechanisms related to human PD-1/VEGFA.
Programmed cell death protein 1 (PDCD1/PD-1) is a member of the B7-CD28 costimulatory receptor family. It is an inhibitory receptor expressed on activated T cells and plays a role in regulating the function of effector T cells, including CD8+ T cells, and promoting the differentiation of CD4+ T cells into regulatory T cells. PD-1 is expressed in a variety of tumors and plays an important role in antitumor immunity. In addition, PD-1 is involved in the defense against autoimmune diseases and has inhibitory effects on antitumor and antimicrobial immunity [1]. PD-1 binds to programmed death ligands 1 and 2 (PD-L1 and PD-L2) to inhibit T cell activation, reduce the production of corresponding cytokines, and regulate T cell survival [2]. Drugs targeting this pathway can reactivate T cells to activate antitumor immune responses [3].
The Vascular Endothelial Growth Factor (VEGF) family is a group of particular endothelial growth factors intimately associated with angiogenesis. These factors promote increased vascular permeability, extracellular matrix degeneration, vascular endothelial cell migration and proliferation, and are capable of stimulating angiogenesis and increasing the permeability of existing vessels. As such, they play a pivotal role in normal vascular development and wound healing. The VEGF family comprises VEGFA, VEGFB, VEGFC, VEGFD, VEGFE, and PLGF [4]. Of these, VEGFA is the most commonly targeted in research related to neovascular ophthalmic diseases due to its crucial role in the proliferation, migration, and formation of endothelial cell microvessels [5]. Overexpression of VEGFA in the eye can result in abnormal vascular growth and leakage, leading to various ophthalmic diseases such as Age-Related Macular Degeneration (AMD), Diabetic Retinopathy (DR), and corneal neovascularization [5-6]. The progression of solid tumors depends on vascularization and angiogenesis within malignant tissues, with VEGFA playing a crucial role among various pro-angiogenic factors. The VEGFA gene is upregulated in many known tumors, correlating with tumor staging and progression. Blocking VEGFA may lead to vascular network regression, inhibiting tumor growth [7]. Thus, VEGFA is an important target for anti-angiogenic cancer therapies.
The B6-hPD-1/hVEGFA mouse is a humanized model obtained by crossbreeding hPD-1 mice (Catalog No. C001524) with B6-hVEGFA mice (Catalog No. C001555). This model can be used for research in drug development, efficacy and safety evaluation, tumor immunotherapy evaluation, and immune system mechanisms related to human PD-1/VEGFA.
B6-H11-hBDCA2 (hCLEC4C)
Product ID:
C001693
Strain:
C57BL/6NCya
Status:
Description:
The CLEC4C gene, also known as BDCA-2 or CD303, encodes a type II transmembrane C-type lectin receptor predominantly expressed by plasmacytoid dendritic cells (pDCs) [1]. This receptor plays a critical role in pDC biology and serves as a key marker for this cell type [2]. The CLEC4C protein, featuring a carbohydrate recognition domain, is implicated in the capture and subsequent processing of antigens, potentially through the recognition of specific glycans and immunoglobulin G [1]. Functionally, CLEC4C acts as a signaling receptor within pDCs, and its engagement can negatively regulate the production of type I interferons, thereby modulating immune responses [2]. Notably, dysregulation of CLEC4C expression and pDC function has been associated with the pathogenesis of autoimmune disorders, including systemic lupus erythematosus (SLE), as well as in the context of certain hematological malignancies [3]. Litifilimab is a monoclonal antibody that targets CLEC4C and is under investigation for the treatment of SLE and other interferonopathies [4].
B6-H11-hCLEC4C mice are humanized models generated by gene editing technology, in which the human CLEC4C genomic DNA was inserted at the H11 safe harbor. This modification does not affect the expression of the mouse homologous gene Clec4b1. This model can be used to study the pathological mechanisms and therapeutic methods of autoimmune disorders and hematological malignancies, as well as the screening and development of CLEC4C-targeted drugs, and preclinical efficacy and safety evaluations.
The CLEC4C gene, also known as BDCA-2 or CD303, encodes a type II transmembrane C-type lectin receptor predominantly expressed by plasmacytoid dendritic cells (pDCs) [1]. This receptor plays a critical role in pDC biology and serves as a key marker for this cell type [2]. The CLEC4C protein, featuring a carbohydrate recognition domain, is implicated in the capture and subsequent processing of antigens, potentially through the recognition of specific glycans and immunoglobulin G [1]. Functionally, CLEC4C acts as a signaling receptor within pDCs, and its engagement can negatively regulate the production of type I interferons, thereby modulating immune responses [2]. Notably, dysregulation of CLEC4C expression and pDC function has been associated with the pathogenesis of autoimmune disorders, including systemic lupus erythematosus (SLE), as well as in the context of certain hematological malignancies [3]. Litifilimab is a monoclonal antibody that targets CLEC4C and is under investigation for the treatment of SLE and other interferonopathies [4].
B6-H11-hCLEC4C mice are humanized models generated by gene editing technology, in which the human CLEC4C genomic DNA was inserted at the H11 safe harbor. This modification does not affect the expression of the mouse homologous gene Clec4b1. This model can be used to study the pathological mechanisms and therapeutic methods of autoimmune disorders and hematological malignancies, as well as the screening and development of CLEC4C-targeted drugs, and preclinical efficacy and safety evaluations.
B6-hPD-1/hCTLA4
Product ID:
I001143
Strain:
C57BL/6NCya
Status:
Description:
PD-1 and CTLA-4 are checkpoint receptors that critically modulate T cell immunity. The genes PDCD1 and CTLA4 encode PD-1 and CTLA-4 respectively, with CTLA4 expression largely restricted to T cells, while PDCD1 is evident in activated T cells, B cells, and myeloid populations [1]. These transmembrane proteins function as key negative regulators of T cell activation [2]. CTLA-4 primarily operates in lymphoid tissues during early immune responses to restrain T cell proliferation, whereas PD-1 predominantly acts in peripheral tissues during the effector phase to dampen T cell activity and limit immunopathology, particularly in chronically stimulated or ‘exhausted’ T cells [2-3]. Aberrant regulation of PD-1 and CTLA-4 is implicated in the pathogenesis of cancers, including melanoma, non-small cell lung cancer, and renal cell carcinoma, as well as chronic viral infections such as hepatitis B and C [1][4]. Clinically, monoclonal antibodies targeting CTLA-4 (e.g., ipilimumab) and PD-1 (e.g., nivolumab, pembrolizumab) are established immunotherapeutic agents that enhance anti-tumor responses. By blocking these negative signaling pathways, these monoclonal antibodies restore the anti-tumor activity of T cells, significantly enhancing anti-tumor responses [1-2]. These drug applications have not only improved the treatment outcomes for various cancers but also offer new strategies for the treatment of chronic viral infections.
B6-hPD-1/hCTLA4 mouse is a dual humanized model of PD1 and CTLA4 constructed by humanizing the mouse Pdcd1 gene based on the CTLA4 humanized mouse model (Catalog No. C001413), due to the fact that the mouse Pdcd1 gene and Ctla4 gene are on the same chromosome. These mice express human CTLA4 and PDCD1 genomic sequences under the control of mouse promoters. This model is capable of reproducing the human PD-1/CTLA4 signaling pathway and is a valuable tool for studying cancers and chronic viral infections. Furthermore, this model provides a powerful preclinical research platform for evaluating the efficacy and mechanism of therapeutic drugs targeting the PD-1/CTLA4 signaling pathway.
PD-1 and CTLA-4 are checkpoint receptors that critically modulate T cell immunity. The genes PDCD1 and CTLA4 encode PD-1 and CTLA-4 respectively, with CTLA4 expression largely restricted to T cells, while PDCD1 is evident in activated T cells, B cells, and myeloid populations [1]. These transmembrane proteins function as key negative regulators of T cell activation [2]. CTLA-4 primarily operates in lymphoid tissues during early immune responses to restrain T cell proliferation, whereas PD-1 predominantly acts in peripheral tissues during the effector phase to dampen T cell activity and limit immunopathology, particularly in chronically stimulated or ‘exhausted’ T cells [2-3]. Aberrant regulation of PD-1 and CTLA-4 is implicated in the pathogenesis of cancers, including melanoma, non-small cell lung cancer, and renal cell carcinoma, as well as chronic viral infections such as hepatitis B and C [1][4]. Clinically, monoclonal antibodies targeting CTLA-4 (e.g., ipilimumab) and PD-1 (e.g., nivolumab, pembrolizumab) are established immunotherapeutic agents that enhance anti-tumor responses. By blocking these negative signaling pathways, these monoclonal antibodies restore the anti-tumor activity of T cells, significantly enhancing anti-tumor responses [1-2]. These drug applications have not only improved the treatment outcomes for various cancers but also offer new strategies for the treatment of chronic viral infections.
B6-hPD-1/hCTLA4 mouse is a dual humanized model of PD1 and CTLA4 constructed by humanizing the mouse Pdcd1 gene based on the CTLA4 humanized mouse model (Catalog No. C001413), due to the fact that the mouse Pdcd1 gene and Ctla4 gene are on the same chromosome. These mice express human CTLA4 and PDCD1 genomic sequences under the control of mouse promoters. This model is capable of reproducing the human PD-1/CTLA4 signaling pathway and is a valuable tool for studying cancers and chronic viral infections. Furthermore, this model provides a powerful preclinical research platform for evaluating the efficacy and mechanism of therapeutic drugs targeting the PD-1/CTLA4 signaling pathway.
B6-hTL1A/hIL23A
Product ID:
C001837
Strain:
C57BL/6N;6JCya
Status:
Description:
TNF-like ligand 1A (TL1A), also known as TNF superfamily member 15 (TNFSF15), is a member of the tumor necrosis factor (TNF) family encoded by the TNFSF15 gene in humans. TL1A acts as a ligand for death receptor 3 (DR3) and decoy receptor 3 (DcR3), providing a stimulatory signal for downstream pathways. It regulates the proliferation, activation, and apoptosis of effector cells, as well as cytokine and chemokine production. TL1A is expressed in various immune cells, including monocytes, macrophages, dendritic cells, and T cells, as well as in non-immune cells such as synovial fibroblasts and endothelial cells. It plays a crucial role in modulating immune responses by promoting the differentiation and survival of T cells, particularly Th17 cells involved in inflammatory processes [1]. TL1A enhances IL-2 responses in anti-CD3/CD28-stimulated T cells and synergizes with IL-12 and IL-18 to augment IFN-γ release in human T and NK cells, biasing T cell differentiation toward a Th1 phenotype [2]. Dysregulation of TL1A expression is implicated in autoimmune diseases, including inflammatory bowel disease (IBD), rheumatoid arthritis (RA), primary biliary cholangitis (PBC), systemic lupus erythematosus (SLE), and ankylosing spondylitis (AS) [1]. TL1A has emerged as a promising therapeutic target, with ongoing research focused on developing monoclonal antibodies and other biologics to neutralize TL1A and reduce inflammation in autoimmune disorders. Clinical trial results suggest that TL1A inhibition can be used in the treatment of various autoimmune diseases, particularly IBD [3-5].
The IL23A gene encodes the p19 subunit, a component of interleukin-23 (IL-23), which forms a heterodimer with the p40 subunit (encoded by IL12B) to generate the functional IL-23 cytokine [1]. Primarily expressed by activated dendritic cells, macrophages, and monocytes, IL-23 signals through the IL-23 receptor (IL-23R) complex, activating the JAK-STAT pathway to promote Th17 cell differentiation and maintain IL-17 production. This process drives inflammatory responses and mucosal immunity against extracellular pathogens [6-7]. Genetic polymorphisms within IL23A are strongly associated with autoimmune and inflammatory diseases, including psoriasis, Crohn's disease, and inflammatory bowel disease, due to dysregulated Th17 activity and chronic inflammation [6-7]. Monoclonal antibodies targeting IL-23, such as risankizumab and guselkumab, selectively block the p19 subunit, demonstrating therapeutic efficacy in psoriasis and inflammatory bowel diseases by suppressing pathogenic IL-17/Th17 pathways [8]. While IL-23 plays a role in protective immunity, its overactivation contributes to tissue damage in autoimmune settings, highlighting its dual function in immune regulation and disease pathogenesis [6-9].
B6-hTL1A/hIL23A mice are humanized models generated by crossing B6-hTL1A (TNFSF15) mice (Catalog No.: C001603) with B6-hIL23A mice (Catalog No.: C001618). These mice are suitable for studying the pathological mechanisms and therapeutic strategies of allergic and inflammatory diseases, immune-related disorders, and cancer, as well as for the screening, development, and preclinical evaluation of TL1A/IL23A-targeted drugs.
TNF-like ligand 1A (TL1A), also known as TNF superfamily member 15 (TNFSF15), is a member of the tumor necrosis factor (TNF) family encoded by the TNFSF15 gene in humans. TL1A acts as a ligand for death receptor 3 (DR3) and decoy receptor 3 (DcR3), providing a stimulatory signal for downstream pathways. It regulates the proliferation, activation, and apoptosis of effector cells, as well as cytokine and chemokine production. TL1A is expressed in various immune cells, including monocytes, macrophages, dendritic cells, and T cells, as well as in non-immune cells such as synovial fibroblasts and endothelial cells. It plays a crucial role in modulating immune responses by promoting the differentiation and survival of T cells, particularly Th17 cells involved in inflammatory processes [1]. TL1A enhances IL-2 responses in anti-CD3/CD28-stimulated T cells and synergizes with IL-12 and IL-18 to augment IFN-γ release in human T and NK cells, biasing T cell differentiation toward a Th1 phenotype [2]. Dysregulation of TL1A expression is implicated in autoimmune diseases, including inflammatory bowel disease (IBD), rheumatoid arthritis (RA), primary biliary cholangitis (PBC), systemic lupus erythematosus (SLE), and ankylosing spondylitis (AS) [1]. TL1A has emerged as a promising therapeutic target, with ongoing research focused on developing monoclonal antibodies and other biologics to neutralize TL1A and reduce inflammation in autoimmune disorders. Clinical trial results suggest that TL1A inhibition can be used in the treatment of various autoimmune diseases, particularly IBD [3-5].
The IL23A gene encodes the p19 subunit, a component of interleukin-23 (IL-23), which forms a heterodimer with the p40 subunit (encoded by IL12B) to generate the functional IL-23 cytokine [1]. Primarily expressed by activated dendritic cells, macrophages, and monocytes, IL-23 signals through the IL-23 receptor (IL-23R) complex, activating the JAK-STAT pathway to promote Th17 cell differentiation and maintain IL-17 production. This process drives inflammatory responses and mucosal immunity against extracellular pathogens [6-7]. Genetic polymorphisms within IL23A are strongly associated with autoimmune and inflammatory diseases, including psoriasis, Crohn's disease, and inflammatory bowel disease, due to dysregulated Th17 activity and chronic inflammation [6-7]. Monoclonal antibodies targeting IL-23, such as risankizumab and guselkumab, selectively block the p19 subunit, demonstrating therapeutic efficacy in psoriasis and inflammatory bowel diseases by suppressing pathogenic IL-17/Th17 pathways [8]. While IL-23 plays a role in protective immunity, its overactivation contributes to tissue damage in autoimmune settings, highlighting its dual function in immune regulation and disease pathogenesis [6-9].
B6-hTL1A/hIL23A mice are humanized models generated by crossing B6-hTL1A (TNFSF15) mice (Catalog No.: C001603) with B6-hIL23A mice (Catalog No.: C001618). These mice are suitable for studying the pathological mechanisms and therapeutic strategies of allergic and inflammatory diseases, immune-related disorders, and cancer, as well as for the screening, development, and preclinical evaluation of TL1A/IL23A-targeted drugs.
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