ציטוט:
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פורסם במקור על ידי גיל גרנות
היי רועי,- תאי השומן אינם יכולים להיווצר מחדש או להגדיל את מספרם. תהליך זה נקרא היפרפלסיה. התהליך יכול להתרחש אך ורק בילדים עד גיל ההתבגרות, מעבר לזה גופנו אינו יכול להגדיל את מספרם, אך בהחלט יכול להגדיל את נפחם לעיתים עד פי 20 (היפרטרופיה) .
מקווה שעזרתי ושבוע נפלא,
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אמנם זה קצת ישן, אבל..
Clin Endocrinol Metab. 1976 Jul;5(2):299-311.
Adipose tissue cellularity in human obesity.
Hirsch J, Batchelor B.
All human obesity is characterised by adipocyte hypertrophy and when body weight exceeds 170 per cent of ideal, a maximum cell size of roughly twice normal is achieved. With greater severity, hyperplasia becomes increasingly manifest and when body weight exceeds 170 per cent of ideal, the degree of hyperplasia is well correlated with severity. Although severity and hypercellularity are often found in those with early onset of obesity, individuals can be found who are hypercellular but have had a later onset of obesity. Until the details of cellular development in man are more fully understood, the precise timing of 'critical' periods for cellular development must remain speculative.
ועוד, מתוך physiology של berne & levy, מהדורה 5:
Adipose cells are metabolically active, and their number is not fixed. Preadipocytes in the stromal tissue can be induced to differentiate into mature adipocytes,
even in adult life, and this process itself is under hormonal regulation.