title: The lifespan-promoting effect of acetic acid and Reishi polysaccharide.
abstract: Using Caenorhabditis elegans as a model organism, various natural substances and commercial health-food supplements were screened to evaluate their effects on longevity. Among the substances tested, acetic acid and Reishi polysaccharide fraction 3 (RF3) were shown to increase the expression of the lifespan and longevity-related transcription factor DAF-16 in C. elegans. We have shown that RF3 activates DAF-16 expression via TIR-1 receptor and MAPK pathway whereas acetic acid inhibits the trans-membrane receptor DAF-2 of the insulin/IGF-1 pathway to indirectly activate DAF-16 expression. In addition, a mixture of acetic acid and RF3 possesses a combined effect 30-40% greater than either substance used alone. A proteomic analysis of C. elegans using 2-DE and LC-MS/MS was then carried out, and 15 differentially expressed proteins involved in the lifespan-promoting activity were identified.
authors.affiliation: Genomics Research Center, Academia Sinica, Taipei 115, Taiwan.
authors.forename: Ming-Hong
authors.initials: MH
authors.lastname: Chuang
authors.forename: Shyh-Horng
authors.initials: SH
authors.lastname: Chiou
authors.forename: Chun-Hao
authors.initials: CH
authors.lastname: Huang
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Yang
authors.forename: Chi-Huey
authors.initials: CH
authors.lastname: Wong
mesh_terms: D019342:Acetic Acid / Q000494:pharmacology*; D000818:Animals; D017173:Caenorhabditis elegans / Q000187:drug effects* / Q000235:genetics / Q000502:physiology*; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000378:metabolism; D002853:Chromatography, Liquid; D015180:Electrophoresis, Gel, Two-Dimensional; D051858:Forkhead Transcription Factors; D005786:Gene Expression Regulation / Q000187:drug effects; D007334:Insulin-Like Growth Factor I / Q000235:genetics / Q000378:metabolism; D008136:Longevity / Q000187:drug effects* / Q000235:genetics / Q000502:physiology*; D011134:Polysaccharides / Q000494:pharmacology*; D040901:Proteomics; D011972:Receptor, Insulin / Q000235:genetics / Q000378:metabolism; D020940:Reishi / Q000737:chemistry*; D053719:Tandem Mass Spectrometry; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D029742:Caenorhabditis elegans Proteins; D051858:Forkhead Transcription Factors; D011134:Polysaccharides; D014157:Transcription Factors; C108831:daf-16 protein, C elegans; D007334:Insulin-Like Growth Factor I; C107483:DAF-2 protein, C elegans; D011972:Receptor, Insulin; D019342:Acetic Acid