The postnatal development of the submandibular gland of the mouse

1979 ◽  
Vol 198 (2) ◽  
Author(s):  
R. Srinivasan ◽  
W.W.L. Chang
1990 ◽  
Vol 45 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Eduardo C. Salido ◽  
Jayaraman Lakshmanan ◽  
Larry J. Shapiro ◽  
Delbert A. Fisher ◽  
Luciano Barajas

1978 ◽  
Vol 26 (11) ◽  
pp. 989-999 ◽  
Author(s):  
B A Mooradian ◽  
L S Cutler

The present study investigated the size, number, and distribution of microperoxisomes (MP) during the prenatal and postnatal development of the rat submandibular gland (SMG). A three-fold increase in MP number per cell was observed in the cells of the rudiment from the 15th to the 16th day of gestation. The early secretory and striated duct cells contained about 9.0 MP. The number of MP per secretory cell decreased such that 3.5 MP were found in each mature acinar cell. In the striated duct cells, MP number progressively increased to 40.0. As the convoluted granular tubule cells (CGT) developed from striated duct cells there was an increase in MP number from 16.0 to 26.0/cell. At maturity, the convoluted granular tubule cells contained only 14.0 MP. Throughout development of the SMG, intercalated duct cells showed only rare MP. The data suggests that the number, size, and distribution of MP changes as a function of the particular path of differentiation followed by the various cells in the rat SMG.


1999 ◽  
Vol 111 (2) ◽  
pp. 153-162 ◽  
Author(s):  
Rui P. Fernandes ◽  
Douglas A. Cotanche ◽  
Kelley Lennon-Hopkins ◽  
Fatih Erkan ◽  
A. Sue Menko ◽  
...  

1975 ◽  
Vol 228 (2) ◽  
pp. 608-612 ◽  
Author(s):  
RJ Grand ◽  
DA Chong ◽  
SJ Ryan

In order to compare the known morphological changes which occur during the postnatal development of the salivary glands in the rat with alterations in membrane function, we measured adenylate cyclase activity and its responses to sodium fluoride (NaF), norepinephrine, and isoproterenol in salivary gland membranes at various times after birth. In the parotid gland, basal enzyme activity did not change significantly during postnatal life, but fluoride-stimulated activity rose on day 15; A similar marked rise in activity stimulated by norepinephrine (0.02 mM) and isoproterenol (0.03 mM) was noted simultaneously. In the submandibular gland, basal adenylate cyclase activity was higher just after birth than at 25 days of life or in maturity. Fluoride-stimulated activity was 7 times higher than basal activity on day 1, greater than 10 times higher on day 25, and 30 times greater in the adult. The gland was as responsive to norepinephrine and isoproterenol on day 5 as it was on day 25 or in the mature animal, showing a two- to threefold increase over the basal enzyme value at each time point studied. Residual phosphodiesterase activity in the membranes was always negligible. The data demonstrate a time-dependent developmental change in the responsiveness of the parotid gland to norepinephrine and isoproterenol, which corresponds to the time when morphological maturation normally occurs. By contrast, in the submandibular gland, membrane-bound adenylate cyclase is fully developed at the time of birth.


Author(s):  
B.A. Mooradian ◽  
L.S. Cutler

In the mature rat submandibular gland (SMG) microperoxisomes have been identified in both acinar secretory cells and ductal cells. The present study was undertaken to investigate the size, number and distribution of microperoxisomes during the pre and postnatal development of the SMG in order to determine if there were changes in cellular microperoxisomes during the functional differentiation of the various cell types.


Sign in / Sign up

Export Citation Format

Share Document