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C57BL/6JCya-Sqstm1em1flox/Cya
Common Name:
Sqstm1-flox
Product ID:
S-CKO-04127
Background:
C57BL/6JCya
Product Type
Age
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Basic Information
Strain Name
Sqstm1-flox
Strain ID
CKOCMP-18412-Sqstm1-B6J-VA
Gene Name
Sqstm1
Product ID
S-CKO-04127
Gene Alias
A170; OSF-6; Osi; STAP; STONE14; p62
Background
C57BL/6JCya
NCBI ID
18412
Modification
Conditional knockout
Chromosome
11
Phenotype
MGI:107931
Document
Click here to download >>
Application
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More
Rare Disease Data Center >>
Note
Note: When using this mouse strain in a publication, please cite “C57BL/6JCya-Sqstm1em1flox/Cya mice (Catalog S-CKO-04127) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000102774
NCBI RefSeq
NM_011018
Target Region
Exon 2~5
Size of Effective Region
~2.7 kb
Detailed Document
Click here to download >>
Overview of Gene Research
Sqstm1, also known as p62, is a multifunctional scaffolding protein and a classical selective autophagy receptor [1,2,7]. It serves as an essential adaptor in selective autophagy, identifying and delivering specific organelles and protein aggregates to autophagosomes for degradation [2]. It is involved in various signaling pathways and plays a crucial role in maintaining cellular proteostasis, which is essential for somatic maintenance [7]. Genetic models such as knockout (KO) or conditional knockout (CKO) mouse models are valuable for studying its functions.

In vascular smooth muscle cells (VSMCs), Sqstm1 deficiency mimicked the phenotype of Ppargc1a depletion, presenting reduced autophagy and increased senescence both in vitro and in vivo. This suggests that Sqstm1 is a major regulator of autophagy and senescence in VSMCs and that the mitochondrial regulator PPARGC1A upregulates autophagy and reduces senescence through a Sqstm1 -dependent mechanism [3].

In the liver, liver-specific sqstm1-knockout mice showed that the SQSTM1-mediated noncanonical KEAP1-NFE2L2 pathway conferred hepatoprotection against lipotoxicity, indicating its importance in protecting the liver from lipotoxicity-related damage [4].

Disrupting the TRIB3-SQSTM1 interaction in mouse models of hepatic fibrosis restored autophagic flux in hepatocytes and hepatic stellate cells (HSCs), protecting against experimentally induced hepatic fibrosis [5].

Knockdown of Sqstm1 in the epidermis of a mouse model inhibited autophagy and delayed wound healing, highlighting its role in diabetic skin wound healing [6].

In conclusion, Sqstm1 is a pivotal player in selective autophagy, with its functions spanning across multiple biological processes such as autophagy regulation, senescence control, and protection against lipotoxicity and fibrosis. The use of KO/CKO mouse models has significantly contributed to understanding its role in diseases related to vascular senescence, fatty liver disease, hepatic fibrosis, and diabetic skin wound healing, providing insights into potential therapeutic strategies targeting these disease areas.

References:
1. Lamark, Trond, Svenning, Steingrim, Johansen, Terje. 2017. Regulation of selective autophagy: the p62/SQSTM1 paradigm. In Essays in biochemistry, 61, 609-624. doi:10.1042/EBC20170035. https://pubmed.ncbi.nlm.nih.gov/29233872/
2. Jeong, Se-Jin, Zhang, Xiangyu, Rodriguez-Velez, Astrid, Evans, Trent D, Razani, Babak. 2019. p62/SQSTM1 and Selective Autophagy in Cardiometabolic Diseases. In Antioxidants & redox signaling, 31, 458-471. doi:10.1089/ars.2018.7649. https://pubmed.ncbi.nlm.nih.gov/30588824/
3. Salazar, Gloria, Cullen, Abigail, Huang, Jingwen, Forouzandeh, Farshad, Hwang, Hyun Seok. 2019. SQSTM1/p62 and PPARGC1A/PGC-1alpha at the interface of autophagy and vascular senescence. In Autophagy, 16, 1092-1110. doi:10.1080/15548627.2019.1659612. https://pubmed.ncbi.nlm.nih.gov/31441382/
4. Lee, Da Hyun, Park, Jeong Su, Lee, Yu Seol, Lee, Yong-Ho, Bae, Soo Han. 2020. SQSTM1/p62 activates NFE2L2/NRF2 via ULK1-mediated autophagic KEAP1 degradation and protects mouse liver from lipotoxicity. In Autophagy, 16, 1949-1973. doi:10.1080/15548627.2020.1712108. https://pubmed.ncbi.nlm.nih.gov/31913745/
5. Zhang, Xiao-Wei, Zhou, Ji-Chao, Peng, Dian, Huang, Bo, Hu, Zhuo-Wei. 2019. Disrupting the TRIB3-SQSTM1 interaction reduces liver fibrosis by restoring autophagy and suppressing exosome-mediated HSC activation. In Autophagy, 16, 782-796. doi:10.1080/15548627.2019.1635383. https://pubmed.ncbi.nlm.nih.gov/31286822/
6. Liang, Diefei, Lin, Wei-Jye, Ren, Meng, Yan, Li, Wang, Wei. 2021. m6A reader YTHDC1 modulates autophagy by targeting SQSTM1 in diabetic skin. In Autophagy, 18, 1318-1337. doi:10.1080/15548627.2021.1974175. https://pubmed.ncbi.nlm.nih.gov/34657574/
7. Kumar, Anita V, Mills, Joslyn, Lapierre, Louis R. 2022. Selective Autophagy Receptor p62/SQSTM1, a Pivotal Player in Stress and Aging. In Frontiers in cell and developmental biology, 10, 793328. doi:10.3389/fcell.2022.793328. https://pubmed.ncbi.nlm.nih.gov/35237597/
Quality Control Standard
Sperm Test

Pre-cryopreservation: Measurement of sperm concentration, determination of sperm viability.

Post-cryopreservation: A vial of cryopreserved sperms is selected for in-vitro fertilization from each batch.

Environmental Standards:SPF
Available Region:Global
Source:Cyagen
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