C57BL/6JCya-Polbem1/Cya
Common Name:
Polb-KO
Product ID:
S-KO-17946
Background:
C57BL/6JCya
Product Type
Age
Genotype
Sex
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Basic Information
Strain Name
Polb-KO
Strain ID
KOCMP-18970-Polb-B6J-VB
Gene Name
Product ID
S-KO-17946
Gene Alias
A430088C08Rik
Background
C57BL/6JCya
NCBI ID
Modification
Conventional knockout
Chromosome
8
Phenotype
Document
Application
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Note: When using this mouse strain in a publication, please cite “C57BL/6JCya-Polbem1/Cya mice (Catalog S-KO-17946) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000033938
NCBI RefSeq
NM_011130
Target Region
Exon 6~9
Size of Effective Region
~4.7 kb
Detailed Document
Overview of Gene Research
Polb, encoding DNA polymerase β, is a member of the DNA polymerase X family. It is mainly involved in eukaryotic DNA replication, DNA damage repair (especially base excision repair-BER), gene recombination, and cell cycle regulation [2]. In metazoans, it has been found to play a significant role in mitochondrial BER, safeguarding mitochondrial DNA (mtDNA) integrity and mitochondrial function, which is vital for organismal survival [1].
Mutations in Polb have been linked to various disease conditions. In mice, the POLB-Y265C mutation leads to the development of lupus-like disease. Mice with this mutation show high levels of antinuclear antibodies and severe glomerulonephritis [3]. Transplantation of bone marrow cells from POLB-Y265C/C mice into wild-type congenic mice demonstrated that the hematopoietic compartment from these mutant mice is sufficient for the development of autoimmune disease [4]. Also, a mouse model with decreased Pol β activity showed an autoimmune pathology resembling systemic lupus erythematosus (SLE), suggesting that decreased Pol β expression in humans may be an underlying cause of SLE [5]. In addition, in MMR-deficient acute lymphoblastic leukemia (ALL) cells, POLB plays a critical role in cell survival and thiopurine resistance. Depletion of POLB or treatment with its inhibitor oleanolic acid (OA) leads to synthetic lethality with MMR deficiency, increasing cellular AP sites, DNA strand breaks, and apoptosis [6].
In conclusion, Polb is essential for DNA repair processes, especially BER, and is crucial for maintaining genomic stability. Mouse models with Polb mutations have revealed its role in the development of autoimmune diseases like lupus and its significance in drug resistance mechanisms in ALL. These findings contribute to our understanding of the underlying mechanisms of these diseases and may potentially lead to new therapeutic strategies.
References:
1. Kaufman, Brett A, Van Houten, Bennett. 2017. POLB: A new role of DNA polymerase beta in mitochondrial base excision repair. In DNA repair, 60, A1-A5. doi:10.1016/j.dnarep.2017.11.002. https://pubmed.ncbi.nlm.nih.gov/29129598/
2. Zhang, Geyang, Wang, Jiamei, Li, Yulong, Wang, Eryao, Lyu, Shijie. 2024. POLB Regulates Proliferation and Apoptosis of Bovine Primary Myocytes. In Animals : an open access journal from MDPI, 14, . doi:10.3390/ani14091323. https://pubmed.ncbi.nlm.nih.gov/38731327/
3. Paluri, Sesha L, Burak, Matthew, Senejani, Alireza G, Stephen Lloyd, R, Sweasy, Joann B. 2021. DNA glycosylase deficiency leads to decreased severity of lupus in the Polb-Y265C mouse model. In DNA repair, 105, 103152. doi:10.1016/j.dnarep.2021.103152. https://pubmed.ncbi.nlm.nih.gov/34186496/
4. Rahim, Tania, Levinson, Madison A, Carufe, Kelly E W, Gades, Naomi, Sweasy, Joann B. 2022. The hematopoietic compartment is sufficient for lupus development resulting from the POLB-Y265C mutation. In PloS one, 17, e0267913. doi:10.1371/journal.pone.0267913. https://pubmed.ncbi.nlm.nih.gov/35486639/
5. Senejani, Alireza G, Liu, Yanfeng, Kidane, Dawit, Bothwell, Alfred L M, Sweasy, Joann B. 2014. Mutation of POLB causes lupus in mice. In Cell reports, 6, 1-8. doi:10.1016/j.celrep.2013.12.017. https://pubmed.ncbi.nlm.nih.gov/24388753/
6. Teng, Ji-Yuan, Yang, Ding-Peng, Tang, Chao, Duan, Cai-Wen, Zhou, Bin-Bing S. 2023. Targeting DNA polymerase β elicits synthetic lethality with mismatch repair deficiency in acute lymphoblastic leukemia. In Leukemia, 37, 1204-1215. doi:10.1038/s41375-023-01902-3. https://pubmed.ncbi.nlm.nih.gov/37095208/
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