A mechanochemical mechanism couples exocrine secretion to endocytic membrane retrieval

2021 ◽  
Vol 56 (11) ◽  
pp. 1557-1559
Author(s):  
Volker Haucke
Keyword(s):  

Diabetes ◽  
1988 ◽  
Vol 37 (9) ◽  
pp. 1173-1180 ◽  
Author(s):  
Y. Okabayashi ◽  
M. Otsuki ◽  
A. Ohki ◽  
T. Nakamura ◽  
S. Tani ◽  
...  


2021 ◽  
Vol 56 (11) ◽  
pp. 1603-1616.e6
Author(s):  
Kumari Kamalesh ◽  
Nadav Scher ◽  
Tom Biton ◽  
Eyal D. Schejter ◽  
Ben-Zion Shilo ◽  
...  






1996 ◽  
Vol 271 (6) ◽  
pp. C1963-C1972 ◽  
Author(s):  
D. J. Culp ◽  
W. Luo ◽  
L. A. Richardson ◽  
G. E. Watson ◽  
L. R. Latchney

We investigated the role of M1 and M3 receptors in regulating exocrine secretion from acini isolated from rat sublingual glands. In secretion experiments, we derived affinity values (KB) from Schild regression analysis for the antagonists pirenzepine (61.0 nM) and 4-diphenylacetoxy-N-methylpiperidine (4-DAMP; 1.06 nM). The KB for 4-DAMP is similar to its affinity value [equilibrium dissociation constant from competition studies (Ki); 1.81 nM] determined from radioligand competition experiments. In contrast, the KB for pirenzepine is between its high-affinity (17.6 nM) and low-affinity (404 nM) Ki values. In separate secretion experiments, we found that the M1 receptor antagonist, M1-toxin, induces a rightward shift in the concentration-response curve to muscarinic agonist and inhibits maximal secretion by 40%. The inhibitory effect of M1-toxin appears specific for M1 receptor blockade, since the toxin abolishes acinar high-affinity pirenzepine-binding sites and does not inhibit secretion induced by nonmuscarinic agents. Additional pharmacological studies indicate muscarinic receptors do not function through putative neural elements within isolated acini. Our combined results are consistent with both M1 and M3 receptors directly regulating mucous acinar exocrine secretion and indicate M3 receptors alone are insufficient to induce a maximal muscarinic response.



Pancreatology ◽  
2017 ◽  
Vol 17 (3) ◽  
pp. S28
Author(s):  
Katarzyna Nawrot-Porabka ◽  
Anna Leja-Szpak ◽  
Joanna Szklarczyk ◽  
Joanna Bonior ◽  
Marta Góralska ◽  
...  


1992 ◽  
Vol 27 (9) ◽  
pp. 783-786 ◽  
Author(s):  
M. I. Vaccaro ◽  
O. M. Tiscornia ◽  
E. L. Calvo ◽  
M. A. Cresta ◽  
D. Celener


1997 ◽  
Vol 50 (1-2) ◽  
pp. 151-152 ◽  
Author(s):  
S.G. Pierzynowski ◽  
B.R. Weström ◽  
B.W. Karlsson


1992 ◽  
Vol 106 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Kuniyoshi Tsuda ◽  
Takemoto Shin ◽  
Sadahiko Masuko

To study the mechanism of autonomic regulation in the larynx, intralaryngeal local ganglia of the cat were investigated using immunohistochemical techniques. Small intralaryngeal ganglia were found in the peripheral portions of internal branches of the superior laryngeal nerve. Ninety-one percent of the ganglionic neurons were immunoreactive (IR) to vasoactive intestinal polypeptide (VIP), and 10% of the VIP-IR cells were also immunoreactive to enkephalin (ENK) and/or substance P (SP). The immunoreactivity of neuronal cell bodies remained unchanged even after denervation of the bilateral superior and recurrent laryngeal nerves. A dense distribution of calcitonin gene-related peptide (CGRP)-IR nerve fibers was found around almost all neuronal cells in the intralaryngeal. ganglia. A few VIP-IR, ENK-IR, and SP-IR nerve fibers were also observed. Only the CGRP-IR fibers disappeared after the denervation experiments. in the laryngeal glands and mucosal arterioles, VIP-IR nerve terminals were found that were also immunoreactive to ENK and/or SP. However, these Immunoreactive nerve endings in the glands and arterioles remained after the denervation experiments. The results of our study indicate that laryngeal exocrine secretion and blood flow are regulated by postganglionic autonomic parasympathetic fibers from intralaryngeal ganglia that contain VIP alone or VIP with ENK and/or SP, and that these ganglionic neurons may be innervated by CGRP-IR extrinsic nerve fibers.



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