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XPA A23G gene polymorphism may be one low-penetrant risk factor for esophageal cancer in Chinese individuals. [meta-analysis]
Reduced protein expression levels of DNA excision repair protein ERCC-3 (ERCC3) and XPA nucleotide excision repair protein (XPA) were associated with an increased risk of squamous cell carcinoma of head and neck (SCCHN).
XPA rs1800975 played a role in the development of early-onset preeclampsia in Chinese Han Women
It provides evidence for an H4K20me2-dependent mechanism of XPA recruitment during lesion recognition in the global-genomic branch of NER.
This study suggested that the XPA gene rs1800975 Polymorphism was associated with lung cancer susceptibility. By performing multiple separate pairwise comparisons, carriers with AG genotype under the codominant genetic model (AG vs. AA) might play actually the leading role in associating with lung cancer susceptibility in overall and in Asians.
We have suggested that the nuclear localization signal on XPA is masked, perhaps in a complex with a cytosolic XPA sequestration protein, and that this complex is disrupted by methanol fixation in non-stressed cells and as part of the DNA damage response following UV irradiation
It can be concluded that A23G XPA polymorphism might contribute to increased lung cancer risk in North Indian population emphasizing on poor survival among females
molecular analysis of the 5 other exons of the XPA gene, showed that the 2 negative siblings carried no mutation in the XPA gene. This finding suggests that c.682C>T (p.Arg228X) mutation is relatively associated with moderate phenotype in XP group A Moroccan families
XPA rs1800975 polymorphism may decrease the risk of breast cancer in both non-Asians and population-based patients
Our results indicate that increased XP-1 levels were associated with PCOS after adjustment for potential confounders, which has been shown to be effective in the function of the insulin signaling pathway.
data obtained allow us to suggest that XPA can be involved in the post-incision NER stages via its interaction with RPA
Data suggest that the multi-protein interactions involved in the nucleotide excision repair (NER) process and potential cytotoxic mechanism associated with Ni(2+) binding in xeroderma pigmentosum complementation group A protein (XPA) may facilitate rational anti-cancer drug design based on the NER mechanism.
XPA status does not globally influence human gene transcription. However, XPA significantly influences expression of a small subset of genes important for mitochondrial functions and steroid hormone metabolism.
These results suggest that for XPA mutants exhibiting altered DNA-binding properties, a correlation exists between the extent of reduction in DNA-binding affinity and the severity of symptoms in XP patients.
These results propose a mechanism for progerin-induced genome instability and accelerated replicative senescence in Hutchinson-Gilford progeria syndrome.
These results illustrate that EZH2 may promote carcinogenesis and cancer development of nasopharyngeal carcinoma by transcriptional repression of XPA gene and inactivation of nucleotide excision repair pathway.
SNP rs10817938 in promoter region associated with poor prognosis of oral squamous cell carcinoma in Chinese Han population
We showed that loss of HERC2 function leads to the accumulation of XPA and BRCA1 in the patient's fibroblasts and generates decreased sensitivity to apoptosis and increased level of DNA repair
Accumulating evidence suggests that XPA and the helicase activity of transcription factor IIH (TFIIH) cooperate to verify abnormalities in damaged DNA chemistry. (Review)
XPA is a key scaffold protein for human nucleotide excision repair. (Review)
The authors' results suggest that lack of the DNA repair factor XPA may delay neurobehavioral recovery after TBI
Oxidized glycerophosphocholines play a pivotal role in the photosensitivity associated with the deficiency of XPA.
The tissue-specific effect of Xpa deficiency represents a novel finding; it suggests that tissue-to-tissue variation in CAG repeat instability arises, in part, by different underlying mechanisms.
The circadian oscillation of XPA is achieved both by regulation of transcription by the core circadian clock proteins including cryptochrome and by regulation at the posttranslational level by the HERC2 ubiquitin ligase.
The Xpa/p53+/- mouse model is an excellent candidate for a future replacement of the chronic mouse bioassay for certain classes of chemicals.
Xeroderma pigmentosum group A (XPA) gene-deficient mice cannot repair UV-induced DNA damage and easily develop skin cancers by UV irradiation. UVB-induced local and systemic immunosuppression was greatly enhanced in the (-/-) mice.
Enhanced spontaneous and aflatoxin-induced liver tumorigenesis in xeroderma pigmentosum group A gene-deficient mice
XPA (-/-), SCF-Tg mice did not develop skin cancers after repeated exposures to UVB for 30 wk at a total dose of 72 J per cm(2)
deficiency results in severe growth retardation and short life span
Xpa-/- keratinocytes (complete nucleotide excision repair deficiency) show a rapid depletion of DNA replicating S-phase cells, a transient increase in quiescent S-phase cells (not replicating DNA), followed by massive apoptosis.
The human carcinogen phenacetin acts as a weak genotoxic agent in an in vivo mouse model system in an Xpa deficient model.
XPC, but not XPA, plays a significant role in the removal of oxidative DNA damage and preventing development of lung tumors
Impaired spermatogenesis and elevated spontaneous tumorigenesis is associated with xeroderma pigmentosum group A gene deficient mice
the Xpa/p53 model is an excellent adjunct to the current chronic rodent bioassay.
This gene encodes a zinc finger protein involved in DNA excision repair. The encoded protein is part of the NER (nucleotide excision repair) complext which is responsible for repair of UV radiation-induced photoproducts and DNA adducts induced by chemical carcinogens. Mutations in this gene are associated with xeroderma pigmentosum complementation group A. Alternatively spliced transcript variants have been found for this gene.
, xeroderma pigmentosum group A-like
, DNA repair protein complementing XP-A cells
, excision repair-controlling
, xeroderma pigmentosum group A-complementing protein
, DNA repair protein complementing XP-A cells homolog
, xeroderma pigmentosum group A-complementing protein homolog
, xpacch protein
, xpacx1 protein