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- W2973842641 abstract "Acinar progenitor cells within salivary glands have decreased regenerative capacity and exhibit shorter telomeres in primary Sjögren's syndrome (pSS) patients. We investigated whether DNA of saliva, PBMCs, and labial salivary gland (LSG) biopsy tissue have shorter telomeres in pSS compared to controls. mRNA expression of genes associated with pSS pathogenesis (ETS1, LEF1, and MMP9), telomere DNA damage response (ATM), senescence (CDKN2A), telomerase inhibition (IFN-y, TGFβ1), and the shelterin complex (TPP1, POT1) were assessed in LSG tissue by qRT-PCR to examine potential defects in telomere maintenance.Relative telomere length in DNA of saliva, PBMCs, and LSGs from non-pSS sicca and pSS patients was measured using qPCR. Saliva DNA telomere length was further compared to healthy controls. Expression of genes affecting telomere maintenance was analyzed in LSGs using qRT-PCR.Primary Sjögren's syndrome patients have shorter telomeres in saliva DNA (n = 21) than healthy controls (n = 27) (P = .0035). ATM mRNA expression was higher in pSS LSG tissue (n = 16) vs non-pSS sicca patients (n = 13) (P = .0283) and strongly correlated with LEF1, TPP1, and POT1 (P < .01, r > 0.6).Patients with pSS exhibited significant telomere erosion in saliva DNA. Overexpression of ATM in LSGs could represent a compensatory response to telomere shortening. The role of LEF1 in telomere erosion remains to be elucidated." @default.
- W2973842641 created "2019-09-26" @default.
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- W2973842641 date "2019-09-29" @default.
- W2973842641 modified "2023-09-27" @default.
- W2973842641 title "Telomere erosion in Sjögren's syndrome: A multi‐tissue comparative analysis" @default.
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- W2973842641 doi "https://doi.org/10.1111/jop.12961" @default.
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