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Lipofuscin accumulation in ageing myocardium & its removal by meclophenoxate
N Patro1, S P Sharma, I K Patro
1Department of Zoology, Kurukshetra University.
Abstract:
A study was undertaken on the age-associated histochemical changes in the ventricular myocardium and the influence of meclophenoxate hydrochloride (MPH) on the age pigment lipofuscin. Sixty Wistar albino rats in three age-groups (3, 15 and 30 months old) were treated with meclophenoxate hydrochloride (100 mg/kg body wt/day, ip) for a period of 2-8 wk. Five animals each from the three age-groups served as controls. Various histochemical and micromorphometric studies were carried out on the myocardial tissue. A linear increase in the myocardial volume occupied by the pigment was observed with advancing age. As a result of meclophenoxate treatment, a gradual decrease in the myocardial volume occupied by the pigment was noted. After 4-6 wk treatment, the pigment bodies were found lodged into the capillary endothelium and the lumen, facilitating the removal of the pigment via blood stream. Histochemical and micromorphometric analyses of ventricular myocardium of albino rats have shown thus that deposition of the age-pigment, lipofuscin, can be accepted as an index of cellular ageing.
Insights
Meclophenoxate hydrochloride (MPH) reduces age pigment lipofuscin accumulation in rat heart muscle. This suggests MPH may help mitigate cellular aging effects in the myocardium.
Area of Science:
- Cardiovascular Science
- Gerontology
- Histochemistry
Background:
- Cellular aging is associated with the accumulation of age pigments like lipofuscin.
- Lipofuscin deposition in the ventricular myocardium is a marker of aging in Wistar albino rats.
- Understanding age-associated changes in the heart is crucial for geriatric health.
Purpose of the Study:
- To investigate age-associated histochemical changes in rat ventricular myocardium.
- To evaluate the effect of meclophenoxate hydrochloride (MPH) on lipofuscin accumulation.
- To determine if lipofuscin deposition can serve as an indicator of cellular aging.
Main Methods:
- Sixty Wistar albino rats across three age groups (3, 15, 30 months) were used.
- Rats received daily intraperitoneal injections of meclophenoxate hydrochloride (100 mg/kg) for 2-8 weeks.
- Histochemical and micromorphometric analyses were performed on myocardial tissue.
Main Results:
- A linear increase in myocardial volume occupied by lipofuscin was observed with advancing age.
- Meclophenoxate hydrochloride treatment led to a gradual decrease in lipofuscin volume.
- After 4-6 weeks of MPH treatment, pigment bodies were observed within capillary endothelium and lumen, suggesting bloodstream removal.
Conclusions:
- Lipofuscin deposition in the ventricular myocardium serves as a reliable index of cellular aging.
- Meclophenoxate hydrochloride demonstrates a potential to reduce age pigment accumulation in the heart.
- Further research into MPH's mechanisms could offer therapeutic strategies for age-related cardiac conditions.