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Insulin-like Growth Factor Signaling Pathway Involved in Regulating Longevity of Rotifers

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Abstract

Rotifers have been used to study the mechanisms of ageing for more than a century, but the underlying molecular basis of ageing in rotifers is largely unknown. The insulin/insulin-like growth factor (IGF-1) signaling pathway has been found to regulate the lifespan of evolutionarily distinct eukaryotes from yeast to mammals. We therefore assume that the insulin/IGF-1 pathway is a candidate for regulating the rotifer’s lifespan. Accordingly, we examined the action of an inhibitor to PI3-kinase involved in the pathway for the rotifer Brachionus plicatilis O. F. Müller. This kinase was first discovered as age-1 to regulate the longevity of Caenorhabditis elegans. As expected, the inhibitor treatment resulted in the extension of lifespan by 30% compared to the reference group without the treatment, whereas reproductive characters were not apparently changed. These results were consistent with those observed in C. elegans, suggesting that the lifespan of B. plicatilis is likely to be regulated by the signaling pathway involving PI3-kinase.

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Author notes

  1. Tatsuki Yoshinaga

    Present address: School of Fisheries Sciences, Kitasato University, 022-0101, Iwate, Japan

Authors and Affiliations

  1. Ocean Research Institute, The University of Tokyo, 164–8639, Tokyo, Japan

    Tatsuki Yoshinaga & Katsumi Tsukamoto

  2. Graduate School of Agricultural and Life Sciences, The University of Tokyo, 113-8657, Tokyo, Japan

    Gen Kaneko, Satoshi Furukawa & Shugo Watabe

  3. RIKEN Brain Science Institute, 351–0198, Saitama, Japan

    Shigeharu Kinoshita

Authors
  1. Tatsuki Yoshinaga
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  2. Gen Kaneko
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  3. Shigeharu Kinoshita
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  4. Satoshi Furukawa
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  5. Katsumi Tsukamoto
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  6. Shugo Watabe
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Correspondence to Tatsuki Yoshinaga.

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Yoshinaga, T., Kaneko, G., Kinoshita, S. et al. Insulin-like Growth Factor Signaling Pathway Involved in Regulating Longevity of Rotifers. Hydrobiologia 546, 347–352 (2005). https://doi.org/10.1007/s10750-005-4244-9

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