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Alteration of expression of Ca2+ signaling proteins and adaptation of Ca2+ signaling in SERCA2+/- mouse parotid acini.

 Jong-Hoon Choi  ;  Hae Jo  ;  Jeong Hee Hong  ;  Syng-Ill Lee  ;  Dong Min Shin 
 YONSEI MEDICAL JOURNAL, Vol.49(2) : 311-321, 2008 
Journal Title
Issue Date
Amylases/metabolism ; Animals ; Blotting, Western ; Calcium/metabolism ; Calcium Signaling/drug effects ; Calcium Signaling/genetics ; Calcium Signaling/physiology* ; Carbachol/pharmacology ; Immunohistochemistry ; Inositol 1,4,5-Trisphosphate Receptors/metabolism ; Mice ; Mice, Knockout ; Parotid Gland/metabolism* ; Sarcoplasmic Reticulum Calcium-Transporting ATPases/genetics ; Sarcoplasmic Reticulum Calcium-Transporting ATPases/metabolism* ; Signal Transduction/drug effects ; Signal Transduction/genetics ; Signal Transduction/physiology
sarco/endoplasmic reticulum Ca2+-ATPase ; Ca2+ signaling proteins ; parotid gland acinar cells
PURPOSE: The sarco/endoplasmic reticulum Ca2+-ATPase (SERCA), encoded by ATP2A2, is an essential component for G-protein coupled receptor (GPCR)-dependent Ca2+ signaling. However, whether the changes in Ca2+ signaling and Ca2+ signaling proteins in parotid acinar cells are affected by a partial loss of SERCA2 are not known. MATERIALS AND METHODS: In SERCA2+/- mouse parotid gland acinar cells, Ca2+ signaling, expression levels of Ca2+ signaling proteins, and amylase secretion were investigated. RESULTS: SERCA2+/- mice showed decreased SERCA2 expression and an upregulation of the plasma membrane Ca2+ ATPase. A partial loss of SERCA2 changed the expression level of 1, 4, 5-tris-inositolphosphate receptors (IP3Rs), but the localization and activities of IP3Rs were not altered. In SERCA2+/- mice, muscarinic stimulation resulted in greater amylase release, and the expression of synaptotagmin was increased compared to wild type mice. CONCLUSION: These results suggest that a partial loss of SERCA2 affects the expression and activity of Ca2+ signaling proteins in the parotid gland acini, however, overall Ca2+ signaling is unchanged.
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Appears in Collections:
5. Research Institutes (연구소) > Oral Science Research Center (구강과학연구소) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orofacial Pain and Oral Medicine (구강내과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Shin, Dong Min(신동민) ORCID logo https://orcid.org/0000-0001-6042-0435
Lee, Syng Ill(이승일)
Jo, Hae(조해)
Choi, Jong Hoon(최종훈) ORCID logo https://orcid.org/0000-0003-3211-3619
Hong, Jeong Hee(홍정희)
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