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Age-Related Changes in the System Metalloproteinases/Tissue Metalloproteinase Inhibitors and Proteoglycan Components

L B Kim1, V A Shkurupy2,3, A N Putyatina2

  • 1Institute of Experimental and Clinical Medicine, Novosibirsk, Russia. lenkim@centercem.ru.

Bulletin of Experimental Biology and Medicine
|June 9, 2016
PubMed

Insights

Age-related changes in mouse organs involve proteoglycan components, matrix metalloproteinase (MMP) activity, and tissue inhibitors of metalloproteinases (TIMPs). MMP and TIMP levels varied across organs and ages, influencing physiological changes during growth and aging.

Area of Science:

  • Biochemistry
  • Gerontology
  • Molecular Biology

Background:

  • Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) are crucial in tissue remodeling.
  • Age-related physiological changes involve alterations in extracellular matrix components.
  • Understanding the interplay between MMPs, TIMPs, and proteoglycans is vital for aging research.

Purpose of the Study:

  • To investigate the age-dependent changes in MMP activity, TIMP levels, and proteoglycan components in mouse organs.
  • To determine the relationship between these factors and the aging process in BALB/c mice.
  • To elucidate the regulatory roles of TIMPs in MMP activity during different life stages.

Main Methods:

  • Analysis of MMP activity, TIMP-1, TIMP-2, and proteoglycan components in liver, lungs, and spleen of mice at 2, 6, and 12 months of age.
  • Measurement of TIMP-1 and TIMP-2 levels in mouse blood serum.
  • Comparative analysis of molecular changes across different organs and age groups.

Main Results:

  • Increased proteoglycan content in mouse organs correlated with age-related changes in MMP activity and TIMP-1/TIMP-2 levels.
  • The ratio of MMP activity to TIMP-1/TIMP-2 content varied significantly among the studied organs.
  • TIMP-1 and TIMP-2 levels in blood serum and organs exhibited asynchronous changes with age.

Conclusions:

  • Age-related alterations in proteoglycans, MMPs, and TIMPs are key features of physiological aging in mice.
  • TIMP-1 and TIMP-2 act as critical regulators of MMP activity across different developmental and aging periods.
  • Organ-specific differences in MMP-TIMP interactions highlight complex regulatory mechanisms during aging.
Keywords:
agematrix metalloproteinasesproteoglycanstissue inhibitors of matrix metalloproteinasesvisceral organs of mice

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