The NAD-dependent deacetylase SIR2 and the forkhead transcription factor DAF-16 regulate lifespan in model organisms, such as yeast and C. elegans. Here we show that the mammalian SIR2 ortholog SIRT1 deacetylates and represses the activity of the forkhead transcription factor Foxo3a and other mammalian forkhead factors. This regulation appears to be in the opposite direction from the genetic interaction of SIR2 with forkhead in C. elegans. By restraining mammalian forkhead proteins, SIRT1 also reduces forkhead-dependent apoptosis. The inhibition of forkhead activity by SIRT1 parallels the effect of this deacetylase on the tumor suppressor p53. We speculate how down-regulating these two classes of damage-responsive mammalian factors may favor long lifespan under certain environmental conditions, such as calorie restriction.
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http://dx.doi.org/10.1016/s0092-8674(04)00126-6 | DOI Listing |
Genes (Basel)
January 2025
Department of Pharmacy and Biotechnology, University of Bologna, 40138 Bologna, Italy.
Background: The human transcription factor controls cell cycle progression and genome stability, and it has been correlated to the onset and progression of many tumor types.
Methods: In our study, we collected all recent sequence and quantitative transcriptomics data about , testing its presence across vertebrate evolution and its upregulation in cancer, both in bulk tissue contexts (by comparing the TCGA tumor dataset and the GTEx normal tissue dataset) and in single-cell contexts.
Results: is significantly and consistently upregulated in all tested tumor types, as well as in tumor cells within a cancer microenvironment.
BMC Gastroenterol
January 2025
Department of General Surgery, Fuwai Central China Cardiovascular Hospital, No. 1, Fuwai Road, Zhengdong New District, Zhengzhou, Henan, 451460, PR China.
Objective: To investigate the effect of capecitabine on the sensitivity of oxaliplatin and on the level of transcription factor forkhead box P1 (FOXP1) and gamma-glutamyl transpeptidase (GGT) in patients with intermediate and advanced gastric cancer.
Methods: A total of 152 Patients with advanced gastric cancer who were continuously diagnosed and treated in our hospital were selected as the study objects. The general data were retrospectively analyzed.
Chin J Nat Med
January 2025
Guangxi Key Laboratory of Bioactive Molecules Research and Evaluation & College of Pharmacy, Guangxi Medical University, Nanning 530021, China; Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education & Center for Translational Medicine, Guangxi Medical University, Nanning 530021, China. Electronic address:
Xiaoaiping (XAP) Injection demonstrates the anti-prostate cancer (PCa) effects, yet the underlying mechanism remains unclear. This study aims to investigate the impact of XAP on PCa and elucidate its mechanism of action. PCa cell proliferation was evaluated using a cell counting kit-8 (CCK-8) assay.
View Article and Find Full Text PDFFront Immunol
January 2025
Section of Immunology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Background: Maintenance immunosuppression is required for suppression of alloimmunity or allograft rejection. However, continuous use of immunosuppressants may lead to various side effects, necessitating the use of alternative immunosuppressive drugs. The early secreted antigenic target of 6 kDa (ESAT-6) is a virulence factor and immunoregulatory protein of mycobacterium tuberculosis (Mtb), which alters host immunity through dually regulating development or activation of various immune cells.
View Article and Find Full Text PDFHepatology
January 2025
Genome Medical Science Project, National Center for Global Health and Medicine, Ichikawa, Japan.
Background Aims: Hepatitis B virus (HBV) leads to severe liver diseases, such as cirrhosis and hepatocellular carcinoma. Identification of host factors that regulate HBV replication can provide new therapeutic targets. The discovery of sodium taurocholate cotransporting polypeptide (NTCP) as an HBV entry receptor has enabled the establishment of hepatic cell lines for analyzing HBV infection and propagation.
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