[Histological observations on the structural changes in rat lacrimal gland by oral administration of lactoferrin].
The purpose of this study was to clarify the influence of enteric-coated lactoferrin (LF) on the secretory function of rat lacrimal secretory gland by using light and electron microscope. The results were as follows. 1) Both A and B granules were observed in lacrimal gland cells in all groups (control groups of young and aged rats, and LF-intake group of aged rat). However, the difference in size and distribution of B granules was determined among different groups. 2) In the control group of young rat, numerous B granules and well-developed cell organelles were observed. On the other hand, a small number of large B granules and undeveloped cell organelles were recognized in the control group of aged rat. 3) In the LF-intake group of aged rat, a large number of large B granules and well developed cell organelles showed similar features to those in the control group of young rat. 4) Large B granules were supposed to be the secretory granules in the final secretory stage. 5) Taken together, it was suggested that the enteric-coated lactoferrin (LF) might promote the secretory function of lacrimal gland cells in aged rat, resulting in the formation of numerous B granules.
Ito
Keiko
K
Maxillofacial Anatomy, Department of Maxillofacial Biology, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Japan.
D000818:Animals; D007765:Lacrimal Apparatus / Q000166:cytology* / Q000000981:diagnostic imaging / Q000187:drug effects*; D007781:Lactoferrin / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D014463:Ultrasonography
D007781:Lactoferrin