"prolonged longevity" is a correct and usable phrase in written English.
You can use it when you want to refer to a long life span. For example: "The key to a healthy lifestyle is to strive for prolonged longevity."
Particularly informative are models with phenotypically accelerated aging or prolonged longevity, engineered transgenic, mutant, and knockout models that focus on a single gene's role, and interventions and environmental manipulations attempting to modulate specific behavioral, anatomic, cellular, or biochemical targets.
Our screen for genetic modifiers of Aβ toxicity in the fruit fly brain identified a transposon-like P-element insertion that markedly prolonged longevity.
Finally, mice carrying a disruption in SURF1, a putative complex IV assembly factor, display a complex IV biochemical defect, markedly prolonged longevity and complete protection from kainic acid-induced neurotoxicity [ 44].
Model simulations suggest that aggregation of parasitoids at flower strips are caused by a prolonged longevity of parasitoids feeding on floral nectar as well as by attraction of parasitoids from the surrounding area.
Slow fertilization (and concomitant prolonged longevity of sperm) may be the result of sexual conflict in which females aimed at complete fertilization and/or multiple paternity.
The oldest individual seen in our cementum analysis of Candiacervus was 18 years, indicating prolonged longevity for a deer of this body size.
JAMA Surgery -- an American Medical Association journal -- recently published a paper reaffirming the benefits of screening colonoscopy, in which the authors wrote: "Compliance to screening colonoscopy guidelines can play an important role in prolonging longevity, improving quality of life, and reducing health care costs through early detection of colon cancer".
The latter also prolongs longevity of the mature cell [ 28].
Caloric restriction prolongs longevity in experimental animals via altering insulin sensitivity.
Resveratrol, a potent sirtuin activator, can prolong longevity in yeast and metazoans (Wood et al. 2004; Valenzano et al. 2006).
Accordingly, the immune suppressant rapamycin, that affects a subset of responses mediated by PI3K, is the only treatment demonstrated to prolong longevity in mammals [ 31, 32].
