Atrial natriuretic peptide (ANP)-granules of auricular cardiocytes in aging Mongolian gerbils.
The atrial natriuretic peptide (ANP)-granules of right auricular cardiocytes were studied in aging Mongolian gerbils by immunohistochemistry and transmission electron microscopy, and analyzed by ultrastructural morphometry. Immunohistochemically, the ANP immunoreactions were weaker in 3 and 4-year-old animals than in 90-day-old, 1- and 2-year-old animals. There was no difference in the reaction among 90-day-old, 1 and 2-year-old animals, or between 3 and 4-year-old animals. Ultrastructurally, the morphological features in 1 and 2-year-old animals were similar to those of 90-day-old animals, but distinct in 3 and 4-year old animals by the presence of a few lysosomal structures in the cell. By ultrastructural morphometry, number and diameter of ANP-granules of 3 and 4-year-old animals were significantly smaller than those in the 90-day-old, 1 and 2-year-old. There was no significant difference in number and diameter among the 90-day-old, 1 and 2-year-old, or between the 3 and 4-year-old.
Mifune
H
H
Institute of Animal Experiment, Kurume University School of Medicine, Fukuoka, Japan.
Suzuki
S
S
Noda
Y
Y
Hayashi
Y
Y
Mochizuki
K
K
D000375:Aging / Q000378:metabolism*; D000818:Animals; D009320:Atrial Natriuretic Factor / Q000378:metabolism* / Q000648:ultrastructure; D005849:Gerbillinae; D006325:Heart Atria; D007150:Immunohistochemistry; D008297:Male; D008854:Microscopy, Electron; D009206:Myocardium / Q000166:cytology / Q000378:metabolism*; D010316:Particle Size
D009320:Atrial Natriuretic Factor