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Spermidine, Found In Cheese And Semen, Extends Lifespan Of Mice And May Work For Humans

Discussion in 'Articles & Scientific Studies' started by paymanz, Nov 22, 2016.

  1. paymanz

    paymanz Member

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    http://www.medicaldaily.com/key-lon...se-and-semen-extends-lifespan-mice-and-404464


    http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.4222.html


    Aging is associated with an increased risk of cardiovascular disease and death. Here we show that oral supplementation of the natural polyamine spermidine extends the lifespan of mice and exerts cardioprotective effects, reducing cardiac hypertrophy and preserving diastolic function in old mice. Spermidine feeding enhanced cardiac autophagy, mitophagy and mitochondrial respiration, and it also improved the mechano-elastical properties of cardiomyocytes in vivo, coinciding with increased titin phosphorylation and suppressed subclinical inflammation. Spermidine feeding failed to provide cardioprotection in mice that lack the autophagy-related protein Atg5 in cardiomyocytes. In Dahl salt-sensitive rats that were fed a high-salt diet, a model for hypertension-induced congestive heart failure, spermidine feeding reduced systemic blood pressure, increased titin phosphorylation and prevented cardiac hypertrophy and a decline in diastolic function, thus delaying the progression to heart failure. In humans, high levels of dietary spermidine, as assessed from food questionnaires, correlated with reduced blood pressure and a lower incidence of cardiovascular disease. Our results suggest a new and feasible strategy for protection against cardiovascular disease.
     
  2. michael94

    michael94 Member

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    nice link paymanz thank you for sharing. Very interesting indeed...
     
  3. Curiousman

    Curiousman Member

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    Spermidine promotes human hair growth and is a novel modulator of human epithelial stem cell functions.
    Ramot Y , et al.

    BACKGROUND:
    Rapidly regenerating tissues need sufficient polyamine synthesis. Since the hair follicle (HF) is a highly proliferative mini-organ, polyamines may also be important for normal hair growth. However, the role of polyamines in human HF biology and their effect on HF epithelial stem cells in situ remains largely unknown.

    METHODS AND FINDINGS:
    We have studied the effects of the prototypic polyamine, spermidine (0.1-1 µM), on human scalp HFs and human HF epithelial stem cells in serum-free organ culture. Under these conditions, spermidine promoted hair shaft elongation and prolonged hair growth (anagen). Spermidine also upregulated expression of the epithelial stem cell-associated keratins K15 and K19, and dose-dependently modulated K15 promoter activity in situ and the colony forming efficiency, proliferation and K15 expression of isolated human K15-GFP+ cells in vitro. Inhibiting the rate-limiting enzyme of polyamine synthesis, ornithine decarboyxlase (ODC), downregulated intrafollicular K15 expression. In primary human epidermal keratinocytes, spermidine slightly promoted entry into the S/G2-M phases of the cell cycle. By microarray analysis of human HF mRNA extracts, spermidine upregulated several key target genes implicated e.g. in the control of cell adherence and migration (POP3), or endoplasmic reticulum and mitochondrial functions (SYVN1, NACA and SLC25A3). Excess spermidine may restrict further intrafollicular polyamine synthesis by inhibiting ODC gene and protein expression in the HF's companion layer in situ.

    CONCLUSIONS:
    These physiologically and clinically relevant data provide the first direct evidence that spermidine is a potent stimulator of human hair growth and a previously unknown modulator of human epithelial stem cell biology.
     
  4. sladerunner69

    sladerunner69 Member

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    Well it's good to know, at this rate, I may actually be the first man to achieve immortality.
     
  5. lvysaur

    lvysaur Member

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    gay
     
  6. X3CyO

    X3CyO Member

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    Great. Ill let my girlfriend know.
     
  7. Runenight201

    Runenight201 Member

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    ah so that’s why women live longer than men.
     
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