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
    g garnet Loss-of-function mutation in g reduces mean lifespan by 11 - 42% and maximum lifespan by 7 - 30% [17435236]. Fruit fly
    Mnt CG13316-PC, isoform C A dMnt null allele results in flies with larger cells, increased weight, and decreased lifespan [16055719]. Fruit fly
    p53 Overexpression of wild-type p53 during adult life has no significant effect on lifespan. Expression of dominant-negative versions of p53 in adult neurons extends lifespan by 58% in females and by 32% in males and increases resistance to genotoxic stress and resistance to oxidative stress, but not to starvation or heat stress, while not affecting egg production or physical activity. Dominant negative p53 expression cancels out lifespan extension effect of DR, low calorie-food (5% SY). Muscle or fat body specific expression of a dominant negative form of p53 as well as globally lack of p53 decreases lifespan [16303568]. Loss of p53 activity slightly shortens the lifespan. Mutants that lack p53 survive well up to 50 days, but mortality rate increases relative to wild-type at later ages. p53 mutant animals are extremely sensitive to irradiation [12935877]. Expression of dominant-negative (DN) form of p53 in adult neurons, but not in muscle or fat body cells, extends median lifespan by 19% and maximum lifespan by 8%. The lifespan of dietary-restricted flies is not further extended by simultaneously expressing DN-DMp53 in the nervous system, indicating that a decrease in Dmp53 activity may be part of the DR lifespan-extending effect. Selective expression of DN-Dmp53 in only the 14 insulin-producing cell (IPCs) in the brain extends lifespan to the same extent as expression in all neurons and this lifespan extension is not additive with DR [17686972]. Fruit fly
    rb ruby Loss-of-function mutation reduces mean lifespan by 33% and maximum lifespan by 22% [17435236]. Fruit fly
    rho-7 rhomboid-7 rho-7 knockout flies have severe neurological defects and a much reduced lifespan [16713954]. Fruit fly
    Sirt2 Decreased expression of Sirt2 by RNA interference causes lethality during development. Silencing in neurons shortened mean lifespan by 20% [17159295]. Fruit fly
    Sirt6 Decreased expression of Sirt6 by RNA interference causes lethality during development. Sirt6 silencing in neurons shortens mean lifespan by 20% [17159295]. Fruit fly
    Sod2 Superoxide dismutase 2 (Mn) RNA interference of Sod2 results in increased oxidative stress and early-onset mortality in young adults [12456885]. Overexpression of Sod2 by 5-115% decreases lifespan by 4-5% without any compensatory changes in metablic rate, level of physical activity, or the levels of other antioxidants (Sod, Cat, and glutathione) [10545213]. Targeted overexpression of Sod2 in motor neurons alone extends lifespan by 30% [11113599]. Induced overexpression of Sod2 in adult animals extends lifespan up to 37% [12072463]. Overexpression of catalase in combination with SOD2 has no added benefit for lifespan [12072463]. Animals overexpressing SOD2 or catalase do not exhibit a decrease in metabolism as measured by oxgen consumption [12072463]. Sod2 overexpression results in a 20% increase in mean and maximum lifespan [18067683]. Fruit fly
    Trx-2 thioredoxin-2 Trx-2 mutants have a 25% reduction in maximum lifespan and exhibit lower tolerance to oxidative stress while animals carrying multiple copies of Trx-2 exhibit higher tolerance [17567437]. Fruit fly
    Akt1 CG4006 gene product from transcript CG4006-RA RNA interference of Akt1 in intestinal stem cells, results in impaired regeneration of the intestinal epithelium and a short lifespan. In males and females on mean lifespan is 11.4% and 7.4% lower [20976250]. Fruit fly
    Aut1 Aut1 depletion form the first day of imaginal stage shortens lifespan by 28% on average in Drosophila and causes morphological behavioural features of premature aging [18219227]. Fruit fly
    Dys Dystroglycan Loss of dys function in the heart leads to an age-dependent disruption of the myofibrillar organization within the myocardium as well as to alterations in cardiac performance. dys RNAi-mediated knockdown in the mesoderm also shortens lifespan. Mesodermal dys knockout results in a morderate maximum lifespan reduction (13%), but not when exclusively targeted to the heart. In contrast, half of the transheteozygous DysExel618/Dyskx43 deficiency flies die at 29 days compared to 63 days in controls. This indicates that a moderate dye loss-of-function in all muscles, but not in just the heart, reduces the normal lifespan [18221418]. Fruit fly
    elav embryonic lethal abnormal vision elav mutation significantly decreases the lifespan. Median lifespan in males is 66% lower [20589912]. Fruit fly
    Hsp22 Heat shock protein 22 Overexpression of mitochondrial Hsp22 in all cells or specifically in motorneurons (using GAL4/UAS binary system) increases life lifespan by 32% and resistance to oxidative stress [19948727; 20036725]. Ubiquitous or a targeted expression of Hsp22 within motorneurons increases the mean lifespan by more than 30%. Hsp22 shows beneficial effects on early-aging events since the premortality phase displays the same increase as the mean lifespan [14734639]. Animals that do not express Hsp22 (due to a transposition into its transcriptional starting site) have a 40% decrease in lifespan, exhibit a 30% decrease in locomotor activity and are sensitive to mild stress [20036725]. Doxycyline-regulated overexpression of Hsp22 makes animals more sensitive to heat and oxidative stress as well as reduces the mean lifespan by up to 21%, particularly at higher culture temperature [15491684]. Hsp22-promoter driven reporter overexpression reduces mean and maximum lifespan [19420297]. Histone deacetylase inhibitor Trichostatin A (TSA) extends the lifespan of *Drosophila melanogaster* by promoting the hsp22 gene transcription, and affecting the chromatin morphology at the locus of hsp22 gene along the polytene chromosome [15346199]. Fruit fly
    CG3776 Both overexpression and underexpression of CG3776 (alias Jhebp29) reduces the mean lifespan, where the reduction in males is slightly higher. The lifespan of male flies with under- and overexpressed CG3776 is reduced by 38.8 and 42.6%, respectively when compared with Oregon R flies.The lifespan of female flies with under- and overexpressed CG3776 is reduced by 31.6 and 35%, respectively when compared to Oregon R flies. Among the males and females, relatively to Oregon R and EP835/CyO, the age-specific survival of EP835/EP835 and EP835/Gal4 is reduced in both log-rank and Wilcoxon tests (P < 0.001); survival of EP835/EP835 and EP835/Gal4 differed using the log-rank-test (male: P<0.001; female: P=0.027) [18275960]. Fruit fly
    kermit The disruption of kermit (alias dGIPC) function results in premature loss of locomotor activity and reduced mean lifespan [21029723]. Fruit fly
    mle maleless Homozygous mutant animals (mle napts) display a shortened median lifespan and increased frailty in both males and females [18208580]. Fruit fly
    Mlp84B Muscle LIM protein at 84B RNA interference of Mlp84B specifically in the heart results in bradycardia and heart rthym abnormalities as well as a shorter mean lifespan in males but not in females [18083727]. Fruit fly
    Nlaz Neural Lazarillo Absence of Nlaz, which is homologous to ApoD, results in a reduced lifespan in both sexes. Median lifespan is 30.8% and 22.5% lower in females and males, respectively. Maximum lifespan is reduced by 12% and 30% in females and males [21376794]. Fruit fly
    Pi3K92E Phosphatidylinositol-3-kinase Heterozyogous mutation in Pi3K92E fails to extend lifespan [11292874] and it is recessive lethal. Overexpression of a dominant-negative Pi3K92E (DP110) results in mutants that have impaired regeneration of the intestinal epithelium and are short lived with a reduction of the mean lifespan by 2.8% for males and 5.0% for females [20976250]. Fruit fly
    pex16 peroxin 16 pex16 mutation lead to a reduced mean lifespan of one-third in females and on-fourth in males. The short lifespan can be rescued by the simultaneous overexpression of pex16 in the fat body and differentiated neurons [21826223]. Mutant flies lack normal peroxisomes, have an reduced adult body size (70%-85% smaller than controls) and rozy eyes, show locomotion defects in the development of the nervous system [21826223]. Fruit fly
    Prx5 Peroxiredoxin 5 Prx5 overexpression causes an increase in mean and median lifespan under normal conditions. It also leads to a small increase in maximum lifespan. dprx5(-/-) null mutants are comparatively more susceptible to oxidative stress, have higher incidence of apoptosis, and a shortened mean lifespan, but thee is no significant difference in maximum lifespan (10% survival) [21826223]. Fruit fly
    Rbp9 RNA-binding protein 9 Rbp9 mutation significantly decreases longevity with a 33% reduction in median lifespan of males [20589912]. Fruit fly
    SNF4Agamma SNF4/AMP-activated protein kinase gamma subunit Deletion of SNF4Agamma from the first day of the imaginal stage shortens mean lifespan by 23% and causes morphological and behavioural features of premature aging [18219227]. Fruit fly
    Thor Null mutation in Thor (alias d4E-BP) causes a significant decrease in longevity (-25% median lifespan in males). Thor is strongly upregulated during starvation. foxo and Thor null mutants are compromised in stress resistant. Stress resistance of foxo null mutants is rescued by Thor overexpression [16055649]. Thor is upregulated on the protein level in a foxo-independent manner upon DR, while it is transcriptional induced in a foxo-dependent fashion by starvation. Thor null mutants cancel out DR-induced lifespan extension, because mutants exhibit a diminished change in lifespan when nutrient conditions were varied. Ubiquitously expression of Thor rescued DR response in females and males. Thor null mutants have a wild-type similar reduction in egg production upon DR. Ubiquitously overexpression of wild-type Thor causes no change under AL, but an activated allele (with more than 3-fold increased binding activity to delF4E) significantly extends lifespan of females (weak allele) and females as well as males (strong allele). Mean lifespan is extended by 11 to 40%. Median lifespan of males and females is enhanced by by 11 and 22%, respectively. Maximum lifespan is extended by 16 and 18% for males and females, respectively. Under DR (0.25% YE) there is no lifespan extension, beyond the effect of DR alone, in all (wild-type, weak and strong) Thor alleles [19804760]. Lifespan of animals with increased Pten and 4E-BP activity in muscle exhibit and extended mean and maximum lifespan by 20% and 15.8% [21111239]. Fruit fly
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    • 25 of 29 factors
    Factors are an extension of GenAge and GenDR.

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