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  • Title: Rat interscapular brown adipose tissue at different ages: a morphometric study.
    Author: Sbarbati A, Morroni M, Zancanaro C, Cinti S.
    Journal: Int J Obes; 1991 Sep; 15(9):581-7. PubMed ID: 1960009.
    Abstract:
    Interscapular brown adipose tissue (IBAT) was studied in newborn and 1, 3, 5, 7, 13, 26, 52, 78 and 104-week-old rats maintained under standard laboratory conditions in order to define its morphological modifications and assess previous statements on an involution phase of IBAT after the first weeks of extrauterine life. Serial sections were analysed morphometrically to quantify the multilocular, the monolocular and the connective-vascular components of IBAT. Morphometry shows that the IBAT weight and volume progressively increase up to the twenty-sixth week of age, these figures remaining almost constant thereafter. The volume of the unilocular and connective components increased with age. The volume of the multilocular component increases up to the sixth month of age, and slightly reduces thereafter. The number of the multilocular adipocytes is almost constant from the third week up to the second year of life. Our results suggest that, in IBAT of adult animals, despite a slight prevalence of unilocular adipocytes, the number of multilocular cells is not reduced with respect to younger animals.
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