Factors

We need to know every factor which determines lifespan.

Lifespan factors often but not always originate from defined genetic elements. They are not just genes, by definition they can be anything for which a Classifications schema can be build for that is related to the regulation of lifespan, such entities may include Single-Nucleotide Polymorphism, transcript variants, proteins and their complexes, compounds (i.e. small molecules like metabolites and drugs), etc. A factor should be based on a defined molecular entity or genomic position and been classified. It shall be highly flexible and scalable Concept.

While individual lifespan factors within each species or precise defined molecular entities will be captured within the Lifespan App, Data Entries of the Data App may summarize for instance the relevance of each factor class (e.g. homologous group; chemical derivate of related structure and properties, etc.) as well as draw overall conclusions. o

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  • symbol name observation species
    aak-2 AMP-Activated Kinase 2 AAK-2 could be a sensor that couples energy levels and insulin-like signals to lifespan. aak-2(ok524) knockout mutants have a 12% and 18% shorter mean and maximum lifespan, respectively as well as faster age-dependent accumulation of a lipofuscin-like fluorescent pigment in the intestine [15574588]. sDR increases AMP:ATP ratio. aak-2 mutation suppresses lifespan extension and delay of the decline in locomotor activity resulting from sDR. A constitutive active mutation of aak-2 is sufficient to cause increase stress resistance as well as to significantly extend lifespan. Both increased stress resistance and extended lifespan is reverted in daf-16 knockdown by RNAi. sod-3 mRNA is increased by constitutive active form of aak-2 and decreased by aak-2 mutation. The increase in sod-3 mRNA is dependent on expression of DAF-16. Worm and human AMPK phosphorylate DAF-16 (greatly enhanced by presence of AMP) at least in six residues (T166, S202, S314, S321, T463 and S466) [17900900]. aak-2 mutation cancels out the lifespan extension effect of sDR and PD, regardless of the concentration of bacteria or peptones. bDR significantly extends lifespan of aak-2 mutants, but to lesser extent than that of wild-type. eat-2 mutation extends the lifespan of aak-2 mutants to the same extent than that of wild-type. Resveratrol does not increase lifespan of aak-2 mutants [19239417]. daf-2(m577);aak-2(ok524) double mutant has a lifespan that is indistinguishable from those of aak-2(ok524) single mutant. Transgenic animals with a higher aak-2 gene dose live on average 13% longer with a maximum lifespan extension on up to 25% [15574588]. Nematode
    aakg-2 AMP-Activated protein Kinase Gamma subunit 2 aakg-2 overexpression extends mean, median, and maximum lifespan by 47, 45, and 35%. Overexpression of aakg-2 toegther with D. rerio ucp2 was non-additive with sDR [22737090]. Nematode
    aqp-1 AQuaPorin or aquaglyceroporin related 1 aqp-1 expression changes in response to glucose or glycerol. Similar to daf-16 and hsf-1 mutants, aqp-1 mutants were short-lived, and their short lifespan was not further decreased by glucose. Overexpression of aqp-1::GFP rescues short lifespan of aqp-1 deletion mutants and partially prevented glucose from shortening lifespan. Glucose or glycerol feeding downregulates aqp-1 in wild-type. In daf-16 and/or hsf-1 mutants aqp-1 is repressed and glucose feeding does not significantly affect its expression. aqp-1 mutation does not further decrease the short lifespan of daf-16 and/or hsf-1 mutants. aqp-1 transgene is expressed in pharynx and intestine (which behaves as entire endoderm of animal, including adipose tissues). Dietary glucose does not cause significant differences in levels of glucose or glycerol in wild-type vs. aqp-1 mutants [19883616]. Nematode
    AAT1 Aspartate AminoTransferase 1 Overexpression of AAT1 extends replicative lifespan by 25% and does not synergize with 0.5% glucose restriction [18381895]. Budding yeast
    asp-3 ASpartyl Protease 3 RNA interference against asp-3 significantly reduces lifespan of eat-2(ad1116) mutants, without any significant affect on the lifespan of wild-type. Mean and 75%ile lifespan of eat-2 mutants is reduced by 13-14% and 5-9% by asp-3 RNAi. ASP-3 is upregulated in eat-2 mutants [22810224]. Nematode
    atg-7 AuTophaGy (yeast Atg homolog) 7 RNA interference against atg-7 shortens mean lifespan by 23% and maximum lifespan by 30% in a eat-2 mutant background but not in wild-type animals. Thus, atg7 RNAi does not affect lifespan of wild-type, but totally cancels out the lifespan extension effect of eat-2 mutation [17912023]. Nematode
    ATG10 AuTophaGy related 10 ATG10 deletion cancels out replicative lifespan extension by DR [18690010]. Budding yeast
    ATG11 AuTophaGy related 11 ATG11 deletion extends replicative lifespan under AL and abrogates DR-lifespan extension [18690010]. Budding yeast
    ATG15 AuTophaGy related 15 Deletion of ATG15 does not affect the lifespan significantly on AL, while DR shortens replicative lifespan of ATG15 deletion mutant by 28% [18690010]. Budding yeast
    ATG16 AuTophaGy related 16 Under AL atg16 mutation shortens chronological, but not replicative lifespan. 0.5% glucose DR extends chronological lifespan of atg16 mutants, but amino-acid DR does not extend the short chronological lifespan of atg16 mutants (similar to several other autophagy mutants). ADE4 deletion in atg16 mutants results only in a partial extension of chronological lifespan by 0.5% glucose DR. The long chronological lifespan of tor1 mutants requires ATG16 [20421943]. Budding yeast
    ATG17 AuTophaGy related 17 ATG17 deletion decreases replicative lifespan under AL and blocks DR-lifespan extension. ATG17 mutant's replicative lifespan decreases by 70% on DR [18690010]. Budding yeast
    ATG2 AuTophaGy related 2 ATG2 deletion prevents chronological lifespan extension induced by amino-acid DR [20421943]. Budding yeast
    bec-1 BEClin (human autophagy) homolog 1 bec-1 is required for normal dauer morphogenesis and lifespan extension. Knockdown of bec-1 via RNA interference results in a shortened mean and maximum lifespan by 14 and 5% [12958363]. bec-1 RNAi does not significantly change the lifespan of wild-type, but completely suppresses the longevity phenotype of eat-2 mutation [17912023; 18282106] and prevents lifespan extension by daf-2(e1370) mutation [12958363]. bec-1 RNAi causes the formation of abnormal dauers in a daf-2(e1379) background [12958363]. Nematode
    BMH1 Brain Modulosignalin Homologue 1 Deleting BMH1 extends chronological lifespan by 25% and is associated with activated stress response, decreased ROS levels and increased heat-shock-element-driven transcription activity. BMH1 deletion was non-additive with the genetic DR mimetic cdc25 and tor1. Water starvation (a form of extreme DR) extends chronological lifespan of BMH1 mutant even more as it does in wild-type. BMH1 genetically interacts with DR as well as TOR- and PKA-signaling pathways to regulate lifespan. Phosphorylation of Ser238 on Bmh1 increases during chronological aging, which is delayed by DR or reduced TOR activity [19805817]. Budding yeast
    pka1 cAMP-dependent protein kinase 1 pka1 knockouts exhibits a three-fold increase in chronological lifespan with up to 187% longer maximum lifespan [16822282]. Deleting ser/thr cAMP-activated protein kinase pka1 extends chronological lifespan under normal condition, but there is no additive effect with DR [20075862]. Fission yeast
    cbp-1 CBP/p300 homolog 1 bDR and daf-2 mutation induce cbp-1 expression. There is no decrease in cbp-1 expression in whole C. elegans during aging. Overexpression of cbp-1 does not significantly affect lifespan. daf-16 RNAi and cbp-1 RNAi reduce average lifespan under AL to about the same extent. Inhibiting cbp-1 via RNAi by 50%, specifically in adult phase and completely blocks lifespan extension of DD, bDR as well as eat-2, glp-1 and clk-1 mutation, but only partially that of daf-2 mutation and not at all that of cold. cbp-1 RNAi completely blocks the lifespan increase by daf-2 mutation under bDR. cbp-1 RNAi blocks the delay of other age-related pathologies by bDR. cbp-1 RNAi prevents protective effects of bDR and accelerates ABeta42-related pathology. bDR significantly delays onset of paralysis even in presence of cbp-1 RNAi. cbp-1 RNAi specifically in adults completely blocks lifespan extension by three distinct protocols of DR (mutation of eat-2), partly by daf-2 mutation but not of cold and blocks the delay of other age-related pathologies by bDR. cbp-1 RNAi has no effect on lifespan in daf-16 hypomorphic mutants. Combining cbp-1 and daf-16 RNAi in wild-type produces similar lifespan as either alone. Resistance to oxidative stress is strikingly reduced by cbp-1 RNAi and cbp-1 RNAi attenuates the protection against oxidative stress by bDR. cbp-1 RNAi accelerates accumulation of autofluorescence, but has no effect on activity, egg laying, or pharyngeal pumping. cbp-1 RNAi does not block induction of daf-16 or hsf-1 by bDR, but does block the induction of DAF-16 target gene, sod-3, and HSF-1 target gene, sip-1 by bDR. cbp-1 RNAi blocks induction of sod-3 expression by daf-2 RNAi. cbp-1 RNAi does not block the increased Nile Red staining produced by daf-2 mutation, but enhanced Nile Red staining. cbp-1 RNAi blocks the effect of bDR on metabolic gene expression from glycolysis towards beta-oxidation. Drugs that enhance histone acetylation increase lifespan and reduce ABeta42-related pathologies, but these protective effects are completely blocked by cbp-1 RNAi. cbp-1 RNAi decreases H4 Lys 5 acetylation and blocks the extension of lifespan as well as delays the onset of paralysis by ABeta1-42 transgene under AL and bDR by sodium butyrate (NaB) and trichostatin (TSA). cbp-1 RNAi does produce dye-filling defects in all C. elegans amphid neurons (ASI, ADL, ASK, AWB, ASH, and ASJ) [19924292]. Nematode
    CDC25 Cell Division Cycle 25 The CDC25-10 allele extends mean and maximum replicative lifespan by 34% and 18%, respectively, at 30 degree Celsius. cdc25-10 mutants have an extended replicative lifespan under AL. Growth on 0.5% glucose restriction does not further extend replicative lifespan of cdc25-10 mutants. CDC25 null mutant is not viable. CDC25 appears to act in the same genetic pathway as SIR2 and NPT1 and is suggested to be genetic model of DR [11000115]. Budding yeast
    CG4389 CG4389 gene product from transcript CG4389-RA Muscle specific RNAi knockdown of CG489 which reduces its mRNA levels by 25-35%, significantly reduces the DR-dependent lifespan extension. CG4389 RNAi animals exhibit only 20% increase while controls display an lifespan increase by 123% upon DR [22768842]. Fruit fly
    CG7834 CG7834 gene product from transcript CG7834-RA Muscle specific RNAi knockdown of CG7834 which reduces its mRNA levels by 25-35%, significantly reduces the DR-dependent lifespan extension. CG7834 RNAi animals exhibit only a 14% increase compared to the 55% lifespan-increase in controls upon DR [22768842]. Fruit fly
    ckr-1 CholecystoKinin Receptor homolog 1 ckr-1 RNAi significantly reduces lifespan of eat-2 but not that of age-1 nor clk-1 mutants [19783783]. Nematode
    ckr-2 CholecystoKinin Receptor homolog 2 ckr-2 RNAi significantly reduces the lifespan of eat-2 but not that of age-1 nor clk-1 mutants [19783783]. Nematode
    cpf-2 Cleavage and Polyadenylation Factor 2 RNA interference of cpf-2 decreases mean lifespan by 6% and suppresses lifespan extension by eat-2 mutation [22829775]. Nematode
    clk-1 CLocK (biological timing) abnormality 1 Mutations in clk-1 slow down development and extend lifespan by 30%. Mutation of both clk-1 and daf-2 results in nearly 5-fold (500%) increase in lifespan [8638122]. Food restriction by eat-2 mutation does not further extend the long lifespan of clk-1 mutant [9789046]. DR and clk-1 mutations may extend lifespan by a similar process. DR by intermittent fasting (IF) significantly extends lifespan of clk-1 mutants, but to a lesser extent than that of wild-type [19079239]. clk-1 mutants do not respond to sDR-induced lifespan extension [19239417]. Overexpression of clk-1 shortens lifespan and is associated with increased mitochondrial activity [10202142]. Transgenic overexpression of mouse Coq7 reverts the extended lifespan of clk-1 mutants [11511092]. clk-1 encodes a enzyme participating in coenzyme Q synthesis [9020081; 11136229]. clk-1 mutants have a decreased pharyngeal pumping and may provoke volunteering DR [9789046]. Mutations in clk-1 are highly pleiotropic resulting in an average lengthing of embryonic development, post-embryonic development, and adult rhythmic behaviours such as defecation, swimming and pharyngeal pumping [7768437]. clk-1 mutants require coeznyme Q [11136229]. clk-1 protein binds the mitochondrial O(L) region and may regulate replication of mitochondrial DNA [11959146]. Nematode
    cup-4 Coelomocyte UPtake defective 4 cup-4 RNAi or overexpession reduces oxidative stress resistance and shortens lifespan of wild-type under AL. cup-4 RNAi significantly reduces the extended lifespan of eat-2 mutants, but failed to block lifespan extension of age-1 or clk-1 mutants. Lifespan of cup-4 mutants increases only moderately by sDR [19783783]. Nematode
    cup-5 Coelomocyte UPtake defective 5 cup-5 RNAi significantly decreases lifespan of eat-2 specifically, whereas lifespan of age-1 or clk-1 mutants are not affected [19783783]. Nematode
    Factors are an extension of GenAge and GenDR.

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