Chloride influx of anion exchanger 2 was modulated by calcium-dependent spinophilin in submandibular glands

Dongun Lee, Sang A. Lee, DongMin Shin, Jeong H. Hong

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Secretory glands including salivary glands by many hormonal inputs produce and secrete biological fluids determined by variety of ion transporters. Spinophilin is a multifunctional scaffolding protein, which involved in receptor signaling and regulation of anion exchangers AE2 activity. We found that spinophilin expressed in salivary glands. The role of salivary spinophilin on the modulation of chloride/bicarbonate exchange remains unknown. The spinophilin enhanced AE2 activity and associated with a STE20/SPS1-related kinase and showed an additive effect on the modulation of the activity of AE2. The cholinergic stimulation and subsequent intracellular Ca 2+ increase was required for the interaction with AE2 and spinophilin and abrogated the enhanced effect of spinophilin on Cl - transporting activity. Ductal chloride/bicarbonate exchange activity was increased in pretreatment with carbachol. The CaMKII inhibitor KN-93 suppressed the chloride/bicarbonate exchange activity of ducts, suggesting that CaMKII was required for ductal chloride/bicarbonate exchange activity. Additionally, microtubule destabilization by nocodazole attenuated the interaction of AE2 and spinophilin and almost abolished the ductal chloride/bicarbonate exchange activity. The treatment of siRNA-spinophilin on the isolated salivary ducts also reduced the ductal chloride/bicarbonate exchange activity. Therefore, role of salivary spinophilin on AE2 may facilitate the Cl - influx from basolateral in salivary glands in response to cholinergic inputs.

Original languageEnglish
Article number889
JournalFrontiers in Physiology
Volume9
Issue numberJUL
DOIs
Publication statusPublished - 2018 Jul 19

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Chloride-Bicarbonate Antiporters
Submandibular Gland
Chlorides
Bicarbonates
Calcium
Salivary Glands
Calcium-Calmodulin-Dependent Protein Kinase Type 2
Cholinergic Agents
Salivary Ducts
Nocodazole
neurabin
Carbachol
Microtubules
Small Interfering RNA
Phosphotransferases
Ions

All Science Journal Classification (ASJC) codes

  • Physiology
  • Physiology (medical)

Cite this

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abstract = "Secretory glands including salivary glands by many hormonal inputs produce and secrete biological fluids determined by variety of ion transporters. Spinophilin is a multifunctional scaffolding protein, which involved in receptor signaling and regulation of anion exchangers AE2 activity. We found that spinophilin expressed in salivary glands. The role of salivary spinophilin on the modulation of chloride/bicarbonate exchange remains unknown. The spinophilin enhanced AE2 activity and associated with a STE20/SPS1-related kinase and showed an additive effect on the modulation of the activity of AE2. The cholinergic stimulation and subsequent intracellular Ca 2+ increase was required for the interaction with AE2 and spinophilin and abrogated the enhanced effect of spinophilin on Cl - transporting activity. Ductal chloride/bicarbonate exchange activity was increased in pretreatment with carbachol. The CaMKII inhibitor KN-93 suppressed the chloride/bicarbonate exchange activity of ducts, suggesting that CaMKII was required for ductal chloride/bicarbonate exchange activity. Additionally, microtubule destabilization by nocodazole attenuated the interaction of AE2 and spinophilin and almost abolished the ductal chloride/bicarbonate exchange activity. The treatment of siRNA-spinophilin on the isolated salivary ducts also reduced the ductal chloride/bicarbonate exchange activity. Therefore, role of salivary spinophilin on AE2 may facilitate the Cl - influx from basolateral in salivary glands in response to cholinergic inputs.",
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Chloride influx of anion exchanger 2 was modulated by calcium-dependent spinophilin in submandibular glands. / Lee, Dongun; Lee, Sang A.; Shin, DongMin; Hong, Jeong H.

In: Frontiers in Physiology, Vol. 9, No. JUL, 889, 19.07.2018.

Research output: Contribution to journalArticle

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