PMID- 19885716 OWN - NLM STAT- MEDLINE DCOM- 20100402 LR - 20231214 IS - 1880-6562 (Electronic) IS - 1880-6546 (Print) IS - 1880-6546 (Linking) VI - 60 IP - 1 DP - 2010 Jan TI - Transepithelial calcium transport in prolactin-exposed intestine-like Caco-2 monolayer after combinatorial knockdown of TRPV5, TRPV6 and Ca(v)1.3. PG - 9-17 LID - 10.1007/s12576-009-0068-0 [doi] AB - The milk-producing hormone prolactin (PRL) increases the transcellular intestinal calcium absorption by enhancing apical calcium uptake through voltage-dependent L-type calcium channel (Ca(v)) 1.3. However, the redundancy of apical calcium channels raised the possibility that Ca(v)1.3 may operate with other channels, especially transient receptor potential vanilloid family calcium channels (TRPV) 5 or 6, in an interdependent manner. Herein, TRPV5 knockdown (KD), TRPV5/TRPV6, TRPV5/Ca(v)1.3, and TRPV6/Ca(v)1.3 double KD, and TRPV5/TRPV6/Ca(v)1.3 triple KD Caco-2 monolayers were generated by transfecting cells with small interfering RNAs (siRNA). siRNAs downregulated only the target mRNAs, and did not induce compensatory upregulation of the remaining channels. After exposure to 600 ng/mL PRL, the transcellular calcium transport was increased by ~2-fold in scrambled siRNA-treated, TRPV5 KD and TRPV5/TRPV6 KD monolayers, but not in TRPV5/Ca(v)1.3, TRPV6/Ca(v)1.3 and TRPV5/TRPV6/Ca(v)1.3 KD monolayers. The results suggested that Ca(v)1.3 was the sole apical channel responsible for the PRL-stimulated transcellular calcium transport in intestine-like Caco-2 monolayer. FAU - Nakkrasae, La-iad AU - Nakkrasae LI AD - Consortium for Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, Thailand. FAU - Thongon, Narongrit AU - Thongon N FAU - Thongbunchoo, Jirawan AU - Thongbunchoo J FAU - Krishnamra, Nateetip AU - Krishnamra N FAU - Charoenphandhu, Narattaphol AU - Charoenphandhu N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20091103 PL - Japan TA - J Physiol Sci JT - The journal of physiological sciences : JPS JID - 101262417 RN - 0 (CACNA1D protein, human) RN - 0 (Calcium Channels) RN - 0 (Calcium Channels, L-Type) RN - 0 (TRPV Cation Channels) RN - 0 (TRPV5 protein, human) RN - 0 (TRPV6 protein, human) RN - 9002-62-4 (Prolactin) RN - SY7Q814VUP (Calcium) SB - IM MH - Caco-2 Cells MH - Calcium/*metabolism MH - Calcium Channels/metabolism/physiology MH - Calcium Channels, L-Type/*physiology MH - Gene Knockdown Techniques MH - Humans MH - Prolactin/pharmacology MH - TRPV Cation Channels/physiology PMC - PMC10717236 EDAT- 2009/11/04 06:00 MHDA- 2010/04/03 06:00 PMCR- 2009/11/03 CRDT- 2009/11/04 06:00 PHST- 2009/08/13 00:00 [received] PHST- 2009/10/07 00:00 [accepted] PHST- 2009/11/04 06:00 [entrez] PHST- 2009/11/04 06:00 [pubmed] PHST- 2010/04/03 06:00 [medline] PHST- 2009/11/03 00:00 [pmc-release] AID - 68 [pii] AID - 10.1007/s12576-009-0068-0 [doi] PST - ppublish SO - J Physiol Sci. 2010 Jan;60(1):9-17. doi: 10.1007/s12576-009-0068-0. Epub 2009 Nov 3.