The reverse transsulfuration pathway has emerged as a central hub that integrates the metabolism of sulfur-containing amino acids and redox homeostasis. Transsulfuration involves the transfer of sulfur from homocysteine to cysteine. Cysteine serves as the precursor for several sulfur-containing molecules, which play diverse roles in cellular processes. Recent evidence shows that disruption of the flux through the pathway has deleterious consequences. In this review article, I will discuss the actions and regulation of the reverse transsulfuration pathway and its links to other metabolic pathways, which are disrupted in Alzheimer's disease (AD). The potential nodes of therapeutic intervention are also discussed, which may pave the way for the development of novel treatments.
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http://dx.doi.org/10.3389/fnagi.2021.659402 | DOI Listing |
Curr Issues Mol Biol
December 2024
Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
Morning-time heart attacks are associated with an ablation in the sleep-time dip in blood pressure, the mechanism of which is unknown. The epigenetic changes are the hallmark of sleep and circadian clock disruption and homocystinuria (HHcy). The homocystinuria causes ablation in the dip in blood pressure during sleep.
View Article and Find Full Text PDFAntioxidants (Basel)
November 2024
School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
Cystathionine γ-lyase (CSE) is the second enzyme in the trans-sulfuration pathway that converts cystathionine to cysteine. It is also one of three major enzymes responsible for the biosynthesis of hydrogen sulfide (HS). CSE is believed to be the major source of endogenous HS in the cardiovascular system, and the CSE/HS system plays a crucial role in a variety of physiological and pathological processes.
View Article and Find Full Text PDFCell Death Dis
November 2024
Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, Korea.
Enhancer of zeste homolog 2 (EZH2), a key protein implicated in various cancers including hepatocellular carcinoma (HCC), is recognized for its association with epigenetic dysregulation and pathogenesis. Despite clinical explorations into EZH2-targeting therapies, the mechanisms underlying its role in gene suppression in HCC have remained largely unexplored. Here, we integrate epigenomic and transcriptomic analyses to uncover the transcriptional landscape modulated by selective EZH2 inhibition in HCC.
View Article and Find Full Text PDFAmino Acids
October 2024
Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.
Cystathionine γ-lyase (CTH) is a critical enzyme in the reverse transsulfuration pathway, the major route for the metabolism of sulfur-containing amino acids, notably converting cystathionine to cysteine. We reported that CTH supports gastritis induced by the pathogen Helicobacter pylori. Herein our aim was to investigate the role of CTH in colonic inflammation.
View Article and Find Full Text PDFNitric Oxide
October 2024
School of Natural Sciences, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada. Electronic address:
Cystathionine gamma-lyase (CSE) is a key enzyme in reverse transsulfuration pathway and contributes to the majority of HS generation in liver tissues via cysteine metabolism. Dysfunction of the CSE/HS system is linked to both chronic and acute liver damage. This study investigated the regulatory role of CSE deficiency on diethylnitrosamine (DEN)-induced liver damage in mice.
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