Age-related changes in the structure and function of chromatin: a review.

Due to rapid advancement in biochemical and biophysical techniques during the last decade, extensive studies have been undertaken to understand the structure and function of chromatin. Several interesting results have been reported regarding the changes in basic organization and function of chromatin during the life time of a eukaryotic cell. The data accumulated so far have been obtained with different organs and organisms and widely differing methods, and the conclusions drawn from them are sometimes contradictory. In this paper, therefore, the available data on the age-associated alterations in the composition, structure and function of chromatin have been discussed, and an attempt has been made to correlate the structural changes in chromatin with alteration in gene expression during aging.