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Telomeric repeat-containing RNA increases in aged human cells

8 months 2 weeks ago
Telomeric repeat-containing RNA (TERRA), transcribed from subtelomeric regions toward telomeric ends, poses challenges in deciphering its complete sequences. Utilizing TERRA-capture RNA-seq and Oxford Nanopore direct RNA sequencing to acquire full-length TERRA, we annotate TERRA transcription regions in the human T2T-CHM13 reference genome. TERRA transcripts encompass hundreds to over a thousand nucleotides of telomeric repeats, predominantly originating from 61-29-37 bp repeat promoters...
Yu-Hung Hsieh

Telomeric repeat-containing RNA increases in aged human cells

8 months 2 weeks ago
Telomeric repeat-containing RNA (TERRA), transcribed from subtelomeric regions toward telomeric ends, poses challenges in deciphering its complete sequences. Utilizing TERRA-capture RNA-seq and Oxford Nanopore direct RNA sequencing to acquire full-length TERRA, we annotate TERRA transcription regions in the human T2T-CHM13 reference genome. TERRA transcripts encompass hundreds to over a thousand nucleotides of telomeric repeats, predominantly originating from 61-29-37 bp repeat promoters...
Yu-Hung Hsieh

Age-dependent impairment of cardiac function and physical performance in male mice with diet-induced obesity

8 months 2 weeks ago
Aging in the context of obesity exacerbates the risk of morbidity and mortality related to cardiovascular disease. However, the maladaptive responses in the heart that arise from prolonged obesity and the specific influence of biological age remain somewhat elusive. This study investigated the effects of diet-induced obesity (DIO) and aging on physical performance and cardiovascular function in mice. 22- and 76-week-old male C57BL/6J mice were randomized to 8 weeks of chow or high-fat diet. Body...
Patricia Baumgarten

Kynurenine pathway dysregulation via loss of QPRT drives declines in activity and altered metabolism in mice

8 months 2 weeks ago
Chronic inflammatory pathway activation increases with age and is epidemiologically linked to multiple aging-related pathophysiological processes, phenotypes such as physical frailty and sarcopenia and early healthspan declines in aging organisms. Despite this, molecular mechanisms that directly connect chronic inflammation to these conditions remain poorly characterized. We hypothesize that chronic inflammation contributes to the development of age-related phenotypes by increasing the...
Reyhan Westbrook

A noncanonical cGAS-STING pathway drives cellular and organismal aging

8 months 2 weeks ago
Accumulation of cytosolic DNA has emerged as a hallmark of aging, inducing sterile inflammation. Stimulator of interferon genes (STING) protein translates the sensing of cytosolic DNA by cyclic-GMP-AMP synthase (cGAS) into an inflammatory response. However, the molecular mechanisms whereby cytosolic DNA-induced cGAS-STING pathway leads to aging remain poorly understood. We show that STING does not follow the canonical pathway of activation in human fibroblasts passaged (aging) in culture,...
Rafael Cancado de Faria