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Journal of Dental Research
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Age-related Changes in the Cellular Level of Amylase and Protein Synthesis in the Rat Parotid Gland

Sun-Kee Kim

Research Service, V.A. Medical Center, Ann Arbor, Michigan 48105, Department of Anatomy, The University of Michigan Medical School, Ann Arbor, Michigan 48109

Age-related changes in the cellular content of secretory proteins and protein synthesis were studied in parotid glands of rats of various ages. The secretory protein content (determined by measuring the level of {alpha}-amylase activity) and the synthesis of proteins (assayed by the rate of incorporation of 3H-leucine into acid-insoluble proteins) decline with increasing age. Morphological and radioautographic studies of the gland indicate that the decline in protein synthesis is due to the reduction in the ability of secretory cells to synthesize proteins.

Journal of Dental Research, Vol. 60, No. 3, 738-747 (1981)
DOI: 10.1177/00220345810600031401
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