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Tag: Sirtuins

NMN molecule
March 26, 2021
Nicotinamide adenine dinucleotide is essential for life The coenzyme nicotinamide adenine dinucleotide (NAD+) serves critical functions in our cells, such as electron transport, cell signaling, and DNA repair. Found in the cells of all mammals, NAD+ is essential for life and is linked closely to metabolism and aging. Accumulating evidence suggests that NAD+ systemically declines...
Diagram of NADH
March 15, 2021
What is nicotinamide adenine dinucleotide? Nicotinamide adenine dinucleotide (NAD+) is a key coenzyme found in all living cells. It is a dinucleotide, which means that it consists of two nucleotides joined through their phosphate groups. One nucleotide contains an adenine base, and the other contains nicotinamide. NAD+ is essential for life, one of the most...
Lungs in orange
February 23, 2021
Scientists have successfully reversed persistent lung fibrosis in mice by overexpressing the SIRT3 protein in lung macrophages [1]. Fibrosis: not knowing when to stop Fibrosis may be the true apex predator of humanity. According to one study, fibrotic diseases that cause organ failure are responsible for around 45% of all deaths in the United States...
Autophagy
October 08, 2020
Genes in the sirtuin family are conserved across a wide range of species and are involved in cellular metabolism, immune response, and aging. SIRT1 is known to decline during aging, but the mechanisms involved in this process were not known. Now, an international team has clarified how SIRT1 is regulated during cellular senescence [1]. Why...
Microscope image of smooth muscle cells
August 18, 2020
Scientists have shown that insulin-like growth factor (IGF-1) mitigates age-related mitochondrial decline and cellular aging in cultured smooth muscular cells [1], although other studies paint a grimmer picture of IGF-1's effects. Mitochondrial decline and aging Mitochondria, dubbed "the powerhouses of the cell" for producing the bulk of the energy that our cells need to operate,...
Mouse facing camera
August 04, 2020
A group of scientists have shown that the SIRT2 protein increases the accumulation of amyloid beta, a known marker of Alzheimer's disease (AD), in the brains of mice. They propose a mechanism underlying this phenomenon and demonstrate that inhibiting SIRT2 ameliorates AD-associated cognitive decline in mice [1]. AD is one of the most devastating age-related...