PMID- 30327201 OWN - NLM STAT- MEDLINE DCOM- 20190521 LR - 20231213 IS - 1879-2596 (Electronic) IS - 0167-4889 (Linking) VI - 1865 IP - 11 Pt A DP - 2018 Nov TI - Anoctamin-6 regulates ADAM sheddase function. PG - 1598-1610 LID - S0167-4889(18)30287-8 [pii] LID - 10.1016/j.bbamcr.2018.08.011 [doi] AB - ADAM17, a prominent member of the "Disintegrin and Metalloproteinase" (ADAM) family, controls vital cellular functions through cleavage of transmembrane substrates including TGF-alpha, Amphiregulin (AREG) and TNF-Receptor 1 (TNFR1). We recently presented evidence that surface exposure of phosphatidylserine (PS) is pivotal for ADAM17 to exert sheddase activity. Anoctamin-6 (ANO6) has Ca(2+)-dependent phospholipid scramblase activity and it followed that the functions of ANO6 and ADAM17 might be linked. We report that overexpression of ANO6 in HEK293T cells led to increased Ca(2+)-mediated PS-exposure that was indeed accompanied by enhanced release of AREG and TGF-alpha. The effect was not observed when cells were treated with the PKC-dependent ADAM17 activator PMA. Transformation of cells with a constitutively active ANO6 mutant led to spontaneous PS-exposure and to the release of ADAM17-substrates in the absence of any stimuli. Inhibitor experiments indicated that ANO6-mediated enhancement of substrate cleavage simultaneously broadened the spectrum of participating metalloproteinases. In complementary experiments, siRNA-mediated downregulation of ANO6 was shown to decrease ionophore-mediated release of TNFR1 in human umbilical vein endothelial cells (HUVECs). We conclude that ANO6, by virtue of its scramblase activity, may play a role as an important regulator of the ADAM-network in the plasma membrane. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Veit, Martin AU - Veit M AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Koyro, Katharina Isabelle AU - Koyro KI AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Ahrens, Bjorn AU - Ahrens B AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Bleibaum, Florian AU - Bleibaum F AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Munz, Martin AU - Munz M AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Rovekamp, Hagen AU - Rovekamp H AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Andra, Jorg AU - Andra J AD - Hamburg University of Applied Science, Ulmenliet 20, 21033 Hamburg, Germany. FAU - Schreiber, Rainer AU - Schreiber R AD - Physiological Institute, University of Regensburg, Universitatsstrasse 31, 93053 Regensburg, Germany. FAU - Kunzelmann, Karl AU - Kunzelmann K AD - Physiological Institute, University of Regensburg, Universitatsstrasse 31, 93053 Regensburg, Germany. FAU - Sommer, Anselm AU - Sommer A AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Bhakdi, Sucharit AU - Bhakdi S AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. FAU - Reiss, Karina AU - Reiss K AD - Dept. of Dermatology, University of Kiel, 24105 Kiel, Germany. Electronic address: kreiss@dermatology.uni-kiel.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180823 PL - Netherlands TA - Biochim Biophys Acta Mol Cell Res JT - Biochimica et biophysica acta. Molecular cell research JID - 101731731 RN - 0 (ANO6 protein, human) RN - 0 (Anoctamins) RN - 0 (Phosphatidylserines) RN - 0 (Phospholipid Transfer Proteins) RN - 0 (Phospholipids) RN - 0 (Transforming Growth Factor alpha) RN - 56092-81-0 (Ionomycin) RN - EC 3.4.24.- (ADAM Proteins) RN - EC 3.4.24.86 (ADAM17 Protein) RN - EC 3.4.24.86 (ADAM17 protein, human) RN - SY7Q814VUP (Calcium) SB - IM MH - ADAM Proteins/*metabolism MH - ADAM17 Protein/metabolism MH - Anoctamins/*metabolism MH - Calcium/metabolism MH - Cell Membrane/metabolism MH - Gene Expression Regulation MH - HEK293 Cells MH - Humans MH - Ionomycin/pharmacology MH - Models, Biological MH - Mutation MH - Phosphatidylserines/*metabolism MH - Phospholipid Transfer Proteins/*metabolism MH - Phospholipids/*metabolism MH - Transforming Growth Factor alpha/metabolism OTO - NOTNLM OT - ADAM17 OT - Anoctamin-6 OT - Phosphatidylserine OT - Scramblase OT - Shedding EDAT- 2018/10/18 06:00 MHDA- 2019/05/22 06:00 CRDT- 2018/10/18 06:00 PHST- 2018/04/13 00:00 [received] PHST- 2018/08/17 00:00 [revised] PHST- 2018/08/20 00:00 [accepted] PHST- 2018/10/18 06:00 [entrez] PHST- 2018/10/18 06:00 [pubmed] PHST- 2019/05/22 06:00 [medline] AID - S0167-4889(18)30287-8 [pii] AID - 10.1016/j.bbamcr.2018.08.011 [doi] PST - ppublish SO - Biochim Biophys Acta Mol Cell Res. 2018 Nov;1865(11 Pt A):1598-1610. doi: 10.1016/j.bbamcr.2018.08.011. Epub 2018 Aug 23.