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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  • Species: + -
  • symbol name observation species
    Loco locomotion defects Reduced expression of Loco due to hetero-deficient results in a 17-20% longer mean lifespan for both male and females, besides the fact that the homozygous deficiency of loco is lethal. Several of these long-lived mutants are more resistant to stresses such as starvation, oxidation and heat. Additionally, mutants have higher Manganese-containing superoxide dismutase (MnSOD) activity, increased fat content an diminished cAMP levels. Loco's RGS domain is required for the regulation of longevity as deletion analysis suggest [21776417]. Fruit fly
    mld molting defective Female, but not male, heterozygous mutants display a 42% increase in mean lifespan at 29 degrees Celsius. DTS-3 +/- female adults exhibit a 50% reduced ecdysone titer and reduced fertility [12610309]. Female, but not male, heterozygoutes also exhibit a temperature-dependent increase in starvation resistance. Fruit fly
    mth methuselah Mutants in mth display approximately 35% and 36% increase in average and maximum lifespan as well as enhanced resistance to various forms of stress (including starvation, high temperature, and dietary paraquat) [9794765]. Reduced expression of mth targeted only to the insulin-producing cells of the brain is sufficient to extend lifespan and to enhance oxdative stress resistance [23121290]. IPC-targeted overexpression of β-arrestin alone mimics the longevity phenotype of reduced mth signaling [23121290]. Fruit fly
    Orco Odorant receptor co-receptor Loss-of-function mutation in Orco (alias Or83b) results in olfactory defects, altered adult metabolism, enhanced stress resistance, and life-extension. Fully fed female homozygous Or83b null mutants exhibit a 56% increase in median lifespan and a 30% increase in maximum lifespan. Males are also significantly longer-lived, though to a smaller degree and maximum lifespan is not extended. Heterozygous mutants of both sexes show an intermediate longevity. Lifespan of homozygous Orco null mutants is further increased by DR, but the relative increase in median and mean longevity is significantly greater when mutants were maintained in well-fed conditions [17272684]. Fruit fly
    ovo The dominant ovoD1 allele extends female lifespan by approximately 50%. It does not synergize or prevent life-extension caused by chico [10617470; 11292874]. ovoD1 mutants are sterile [Mevel-Ninio et al. 1991]. 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
    pex1 peroxin 1 Mutation of the promoter region of pex1(S4868), results in lower expression levels and increases lifespan in males and females by 16% and 13%, respectively. pex1 mutation increases mean and maximum lifespan and males/females by 27-23/14-19% and 0-15%, respectively [22509016]. Fruit fly
    pex13 peroxin 13 Mutation of pex13(KG04339), located in its promoter region, results in lower gene expression and increased lifespan by around 16% and 13% in males and females. pex13 mutation increases mean and maximum lifespan by 23-27/14-19% and 11%, respectively [22509016]. Fruit fly
    puc puckered Heterozygous loss-of-function mutations in puc (either pucA241.1 or pucE69) significantly extend median and maximum lifespan and increase resistance to oxidative stress. Heterzyogosity for puc only modestly extends lifespan in animals carrying a hypomorphic allele of the JNK kinase hep [14602080]. puc heterzyogotes do not differ signficantly from wild-type for body size, reproductive activity or developmental timing, but exhibit increased resistance to oxidative stress and starvation [14602080]. Fruit fly
    Rpd3 Histone deacetylase Rpd3 Males heterozygous for hypomorphic (partial loss-of-function) or null mutation of Rpd3 have a lifespan extension of 33% and 41 - 47%, respectively. Females heterozygous for a hypomorphic allele have a 52% increase in lifespan, but females carrying a null mutation have only modest increase in maximum lifespan (but not median lifespan). Longevity increases to the same extent in wild-type under low-calorie diet and rpd3 mutants fed normal diet. DR fails to further increase lifespan of rpd3 mutants. DR leads to a moderate but significant down-regulation of Rpd3, analogous to decrease obtained in heterozygotes carrying rpd3 mutation. rpd3 mutants fed normal food and wild-type fed low-calorie increase Sir2 expression two-fold [12459580]. Fruit fly
    S6k RPS6-p70-protein kinase Ubiquitous overexpression of a dominant-negative form of S6k (alias dS6K) increases mean lifespan by 22% and overexpression of a constitutively active form of S6k decreases mean lifespan by 34% at 29°C. Overexpression of a dominant-negative form of S6k protects mutants from deleterious effects of rich food, as if mimicking the effect of DR [15186745]. Fruit fly
    snz snazarus Mutation in snz increases maximum lifespan of both sexes by up to 66%, while the median female lifespan is approximately 85% higher and that of males around 72% [18478054]. Fruit fly
    sun Stunted sun mutations increases lifespan and resistance to oxidative stress [15133470] Fruit fly
    Surf1 surfeit gene 1 Surf1 knockdown results in larval lethality. However, knockdown in the central nervous system (CNS) not only bypasses the larval lethality but it results in an increase in maximum lifespan of about 20-30% [16172499]. Fruit fly
    Tor Target of rapamycin Expression of a dominant-negative form of Tor extends lifespan [15186745]. Ubiquitious overexpression of dTOR with the da-GAL4 driver of UAS-dTOR(FRB) which contains the 11kDA FKB12-rapamycin binding domain led to a mean and maximum lifespan increase of 15% (24%) and 29% at 29°C and of 50% (26%) and 13% at 25°C, respectively [15186745]. Overexpression of the dominant-negative form of Tor specifically in the fat and muscle tissues is sufficient to extend the mean and maximum lifespan by 24 and 19%, respectively [15186745]. Overexpression of UAS-dTOR(WT) or UAS-dTOR(TED) prevents eclosion to adulthood [15186745]. Fruit fly
    Factors are an extension of GenAge and GenDR.

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