Non-essential contribution of LRRC8A to volume regulation

作者：Sirianant Lalida; Wanitchakool Podchanart; Ousingsawat Jira****; Benedetto Roberta; Zormpa Anna; Cabrita Ines; Schreiber Rainer; Kunzelmann Karl^*

来源：Pflugers Archiv-European Journal of Physiology, 2016, 468(5): 805-816.

DOI：10.1007/s00424-016-1789-6

• LRRC8A
• VRAC
• Volume-activated anion channels
• Volume regulation: regulatory volume decrease
• RVD, apoptotic volume decrease
• AVD

Volume regulation is an essential property of any living cell and needs to be tightly controlled. While different types of K+ channels have been found to participate in the regulation of cell volume, the newly identified volume-regulated anion channel (VRAC) LRRC8 has been claimed to be essential for volume regulation. In unbiased genome-wide small interfering RNA (siRNA) screens, two independent studies identified LRRC8A/Swell1 as an essential component of VRAC, thus being indispensable for cellular volume regulation. We reanalyzed the role of LRRC8A for VRAC and regulatory volume decrease (RVD) in several cell types and under various conditions. While the role of LRRC8A for VRAC and its contribution to RVD is confirmed, we find that it is not essential for swelling-activated anion currents or cellular volume regulation, or apoptotic cell shrinkage. The contribution of LRRC8A is variable and largely depending on the cell type.

• 出版日期2016-5