Related Experiment Videos
[Molecular abnormality in aging: its contribution to clinical pathology]
Naoki Maruyama1, Akihito Ishigami, Yoshitaka Kondo
1Department of Molecular Pathology, Tokyo Metropolitan Institute of Gerontology, Itabashi-ku, Tokyo 1730015.
Rinsho Byori. the Japanese Journal of Clinical Pathology
|September 30, 2005
Summary
The novel protein SMP30, crucial for cellular health, declines with aging. Its decrease contributes to senescence and organ injury, highlighting its role in aging processes and disease.
Area of Science:
- Gerontology and Cellular Biology
- Biochemistry and Molecular Biology
Context:
- Aging is associated with decreased expression of the novel protein SMP30, linked to oxidative stress.
- SMP30 plays a role in cellular frailty and senescence.
- Citrullination, a post-translational modification, is implicated in aging and disease.
Purpose:
- To investigate the function of SMP30 in aging and its effect on the plasma membrane calcium pump.
- To explore the role of SMP30 in senescence using a knockout model.
- To examine the presence and significance of citrullinated proteins in aging and diseases like Alzheimer's and psoriasis.
Summary:
- SMP30 enhances plasma membrane calcium pump activity; its decline with aging contributes to cellular frailty and senescence.
- SMP30 exhibits organophosphatase and gluconolactonase activities, linking it to the pentose phosphate and ascorbic acid pathways.
- Abnormal accumulation of citrullinated proteins, including vimentin and GFAP, was observed in Alzheimer's disease hippocampus, with elevated PAD expression.
Impact:
- Findings suggest SMP30's pivotal role in aging, cellular injury, and senescence.
- Citrullinated proteins may serve as biomarkers for organ injuries and are critical for epidermal differentiation.
- This research bridges gerontology and clinical pathology, offering insights into age-associated diseases.