https://transhumanist.ru/index.php?action=history&feed=atom&title=HTRA2 2026-04-11T12:37:32Z История изменений этой страницы в вики MediaWiki 1.43.6 https://transhumanist.ru/index.php?title=HTRA2&diff=4469&oldid=prev 2021-04-29T19:19:41Z

<p>Новая страница: «Serine protease HTRA2, mitochondrial precursor (EC 3.4.21.108) (High temperature requirement protein A2) (HtrA2) (Omi stress-regulated endoprotease) (Serine prote...»</p> <p><b>Новая страница</b></p><div>Serine protease HTRA2, mitochondrial precursor (EC 3.4.21.108) (High temperature requirement protein A2) (HtrA2) (Omi stress-regulated endoprotease) (Serine protease 25) (Serine proteinase OMI) [OMI] [PRSS25]<br /> <br /> ==Publications==<br /> <br /> {{medline-entry<br /> |title=A novel role for the mitochondrial [[HTRA2]]/OMI protease in aging.<br /> |pubmed-url=https://pubmed.ncbi.nlm.nih.gov/23242108<br /> |abstract=[[HTRA2]]/OMI is an ATP-independent serine protease located in the intermembrane space of the mitochondria and is thought to function as a protein quality control protease. Our previous studies showed that loss of the enzymatic activity of [[HTRA2]] due to a Ser276Cys missense mutation in its catalytic domain is associated with early onset neurodegeneration, multiple tissue atrophy and premature lethality in homozygous htra2 (mnd2) mice, suggesting that [[HTRA2]] is neuroprotective. To further investigate the role of [[HTRA2]] in neuronal cell survival and the impact of its loss of function in non-neuronal tissues of adult mice, we generated transgenic htra2 (mnd2) mice expressing a neuron-targeted human [[HTRA2]] transgene. Notably, this [[HTRA2]] transgene rescues htra2 (mnd2) mice from early onset neurodegeneration, and other phenotypic abnormalities and prevents their early death, indicating that [[HTRA2]] activity in neuronal mitochondria is important for neuronal cell survival. However, as the rescued htra2 (mnd2) mice grow older they exhibit specific phenotypic abnormalities indicative of premature aging. These include premature weight loss, osteoporosis, lordokyphosis, muscle atrophy, heart enlargement, increased autophagy and reduced life span. There is also a significant increase in the levels of clonally expanded mitochondrial DNA (mtDNA) deletions in their tissues. Our findings suggest that [[HTRA2]]-regulated protein quality control in the intermembrane space of mitochondria is important for the maintenance of mitochondrial homeostasis, and loss of [[HTRA2]] activity can lead to both neurodegeneration and aging.<br /> |mesh-terms=* Adenosine Triphosphate<br /> * Aging<br /> * Animals<br /> * Apoptosis<br /> * Cell Survival<br /> * DNA, Mitochondrial<br /> * High-Temperature Requirement A Serine Peptidase 2<br /> * Humans<br /> * Mice<br /> * Mice, Transgenic<br /> * Mitochondria<br /> * Mitochondrial Proteins<br /> * Neurodegenerative Diseases<br /> * Neurons<br /> * RNA, Messenger<br /> * Reactive Oxygen Species<br /> * Serine Endopeptidases<br /> |keywords=* HTRA2<br /> * aging<br /> * mitochondria<br /> * mitochondrial DNA<br /> * mitophagy<br /> * neurodegeneration<br /> * quality control<br /> |full-text-url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3590264<br /> }}</div>

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