title: [Aging changes of alpha-amylase and lysozyme in normal parotid gland].
abstract: OBJECTIVE
  To investigate the aging changes, the distribution and the content of alpha-amylase, lysozyme in the normal parotid glands.
  
  
  METHODS
  Fifty-one specimens of parotid glands with 4 different age groups were studied by immunohistochemical method. The intensity of staining of alpha-amylase, lysozyme was recorded in different age groups.
  
  
  RESULTS
  The staining positivity rate of alpha-amylase, lysozyme had striking differences in 4 different age groups and it gradually decreased along with the age increasing.
  
  
  CONCLUSIONS
  There are differences among seous acinus which had similar shape and staining in HE slice. The characters of aging changes of alpha-amylase, lysozyme secreted by acinar and intercalated duct cells are conformity with the results of quantitative studies in histology.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: G
authors.initials: G
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Gao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000378:metabolism*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009113:Muramidase / Q000378:metabolism*; D000516:alpha-Amylases / Q000378:metabolism*
chemical_list: D000516:alpha-Amylases; D009113:Muramidase