Assessing the effects of deprenyl on longevity
and antioxidant defenses in different animal models

Kitani K, Kanai S, Ivy GO, Carrillo MC
National Institute for Longevity Sciences,
Aichi, Japan.
Ann N Y Acad Sci 1998 Nov 20; 854:291-306

ABSTRACT

Among many pharmaceuticals that have been tested for their effects on longevities of different animal rodents, deprenyl is unique in that its effects on longevity has been tested in at least four different animal species by independent research groups and that the effect has been postulated to be due to its effect of raising such antioxidant enzyme activities as superoxide dismutase (SOD) and catalase (CAT) in selective brain regions.  Thus far, in all four species of animals examined (rats, mice, hamsters, and dogs), a positive effect was demonstrated, although the extent of its effect is quite variable. Our group has examined the effect on longevities in rats and mice and on antioxidant enzymes in rats, mice, and dogs. Although in rats of both sexes, we have obtained positive effects on longevity, two studies with different doses in mice did not reveal a significantly positive effect.  We have observed, however, significantly positive effects on SOD (in Cu, Zn-, and Mn-) as well as CAT (but not glutathione peroxidase) activities in the brain dopaminergic system such as in the S. nigra and striatum (but not in hippocampus) in all rats, mice, and dogs, although the effects were quite variable, depending on the doses used. In mice, however, a long-term administration (3x/w, 3 months) caused a remarkable decrease in the magnitude of activity as well as a narrowing of the effective dose range, which may explain a relatively weak effect of the drug on mouse longevity.  Further, a recent study on aging beagle dogs by Ruehl et al. showed a remarkable effect on longevity, which agrees with our SOD study in dogs.  Although deprenyl has been claimed to have several other effects, such as a radical scavenging effect and a neuroprotective effect, past reports on its effects on longevities and antioxidant defenses are compatible with the notion that the drug prolongs the life span of animals by reducing the oxidative damage to the brain dopaminergic system during aging.  Further, our studies on F-344 rats as well as a dog study by Ruehl et al. suggest that the drug may at least partially prolong the life span of animals by enhancing immune system function and preventing tumor development in animals.
  • Deprenyl   is an effective antidepressant
  • Deprenyl   in treatment-resistant older depressive patients
  • Deprenyl   + phenylalanine was beneficial in 90% of depression patients
  • Deprenyl   antidepressant effects are by means other than MAO-B inhibition
    Deprenyl   treated rats were much more sexually active
    Deprenyl       enhances sexual performance and longevity in rats
    Deprenyl   may delay the deterioration of neurons during aging
  • Deprenyl   the history of deprenyl
  • Deprenyl   decreases susceptibility to Parkinson's & Alzheimer's disease
  • Deprenyl   restores IGF-1 to youthful levels
  • Deprenyl   protects the vascular endothelium from beta amyloid plaque
  • Deprenyl   reduces cocaine "high"
  • Deprenyl   prolongs animal lifespan by reducing oxidative damage to the brain
  • Deprenyl   may be useful in the treatment of cocaine dependence
  • Deprenyl   increases the life span in Fischer rats
  • Deprenyl   effects on short term memory in young and aged dogs
  • Deprenyl   maintains sexual acitivity in old rats
  • Deprenyl   and Fluoxetine (Prozac) do not interact in combination
  • Deprenyl   prolongs life in elderly dogs
  • Deprenyl   has a cardiac neuroprotective effect
  • Deprenyl   reduces oxidative stress and increases free radical elimination

  • Deprenyl   responses of forebrain neurons to deprenyl

  • Deprenyl   Parkinson's and Alzheimer's patients need 10 mg of deprenyl daily

  • Deprenyl   inhibits tumor growth in rats with mammary tumors

  • Deprenyl   slows the decline of sexual and learning performances in rats

  • Deprenyl   is ten times stronger than methamphetamine as a catecholaminergic

  • Deprenyl   shows favorable results in Tourette's syndrome and narcolepsy

  • Deprenyl   treated rats lived beyond the known maximum lifespan

  • Deprenyl   protects cells from the DNA damage

  • Deprenyl   may protect neurons from ischemic or oxidative damage

  • Deprenyl   prolongs animal lifespan by reducing oxidative damage to the brain

  • Deprenyl   effects on cocaine-induced euphoria

  • Deprenyl   effects on response to experimental cocaine administration  

  • Deprenyl   Are metabolites of deprenyl useful or harmful?

  • Deprenyl   slows the progression of Parkinson's disease

  • Deprenyl   suppresses excitotoxic damage in Parkinson's disease

  • Deprenyl   effect of deprenyl on arm movement in early Parkinson's

  • Deprenyl   effect on cognitive functions in early Parkinson's 

  • Deprenyl   prolongs the life span of Parkinsonian patients significantly

  • Deprenyl   depression in Parkinson's disease

  • Deprenyl   increases the dopamine content of the nerve terminals in Parkinson's

  • Deprenyl   improves visuo-motor control in early Parkinsonism

  • Deprenyl   management of early Parkinson's disease

  • Deprenyl   delays the onset of disability in Parkinsonian patients

  • Deprenyl   and tocopherol antioxidative therapy of Parkinsonism

  • Deprenyl   slows the death of nigral neurons in Parkinson's disease

  • Deprenyl   + levodopa treated Parkinson's patients live longer

  • Deprenyl   stimulates biosynthesis of cytokines interleukin-1 & 6

  • Deprenyl   effect of MAO-B inhibitors on MPP+ toxicity

  • Deprenyl   modulates the activity of catecholamine-sensitive neurons

  • Deprenyl   improves the performance of patients with Alzheimer's disease

  • Deprenyl   for Alzheimer's disease  

  • Deprenyl   MAO-B inhibitors in the treatment of Alzheimer's disease

  • Deprenyl   in the treatment of Alzheimer's disease

  • Deprenyl   stimulates biosynthesis of cytokines interleukin-1 & 6

  • Deprenyl   and age-related decline of the striatal dopaminergic system

  • Deprenyl   increases dopamine in the striatum of primates

  • Deprenyl   use in treatment-resistant elderly depression patients

  • Deprenyl   protects against neurotoxins

  • Deprenyl   increased rat lifespan by 5%
    Deprenyl   neuroprotective action
    Deprenyl   inhibition of human LDL oxidation
    Deprenyl   facilitates recovery after stroke

  • Deprenyl   effects during smoking and short-term abstinence

 

 

 

Hit Counter