PMID- 35321565 OWN - NLM STAT- MEDLINE DCOM- 20220405 LR - 20220607 IS - 1555-3892 (Electronic) IS - 0963-6897 (Print) IS - 0963-6897 (Linking) VI - 31 DP - 2022 Jan-Dec TI - Induction of Human Umbilical Mesenchymal Stem Cell Differentiation Into Retinal Pigment Epithelial Cells Using a Transwell-Based Co-culture System. PG - 9636897221085901 LID - 10.1177/09636897221085901 [doi] LID - 09636897221085901 AB - There is an increasing interest in generating retinal pigment epithelial (RPE) cells from stem cells for treating degenerative eye diseases. However, whether human umbilical cord mesenchymal stem cells (HUCMSCs) can differentiate into RPE-like cells in a co-culture system has not been fully understood. In this study, induction of HUCMSC differentiation into RPE-like cells was performed by co-culturing HUCMSCs and a human RPE-like cell line (ARPE19) in a transwell system and then analyzed for biomarkers using quantitative reverse transcription polymerase chain reaction (RT-PCR) and immunofluorescence staining technique. Moreover, the functional characterization of induced cells was carried out by examining their phagocytic and neurotrophic factor-secreting activities. Our results showed that mRNA expressions of RPE-specific markers-MITF, OTX2, RPE65, PEDF, PME17, and CRALBP-and protein markers-RPE65, CRALBP, and ZO-1-were significantly increased in HUCMSC-derived RPE-like cells. Functional characteristic studies showed that these induced cells were capable of engulfing photoreceptor outer segments and secreting brain-derived neurotrophic factor (BDNF) and glial-derived neurotrophic factor (GDNF), which are typical functions of RPE-like cells. Overall, the study findings indicate that the morphology and proliferation of HUCMSCs can be maintained in a serum-free medium, and differentiation into RPE-like cells can be induced by simply co-culturing HUCMSCs with ARPE19 cells. Thus, the study provides fundamental information regarding the clinical-scale generation of RPE-like cells from HUCMSCs. FAU - Chang, Yu-Hsun AU - Chang YH AD - Department of Pediatrics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Foundation and Tzu Chi University, Hualien. FAU - Kumar, V Bharath AU - Kumar VB AUID- ORCID: 0000-0002-4786-9913 AD - Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung. FAU - Wen, Yao-Tseng AU - Wen YT AD - Department of Ophthalmology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Foundation and Tzu Chi University, Hualien. FAU - Huang, Chih-Yang AU - Huang CY AUID- ORCID: 0000-0003-2347-0411 AD - Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung. AD - Department of Chinese Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien. AD - Graduate Institute of Biomedical Sciences, China Medical University, Taichung. AD - Center of General Education, Buddhist Tzu Chi Medical Foundation, Tzu Chi University of Science and Technology, Hualien. AD - Department of Medical Research, China Medical University Hospital, China Medical University, Taichung. FAU - Tsai, Rong-Kung AU - Tsai RK AD - Department of Ophthalmology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Foundation and Tzu Chi University, Hualien. FAU - Ding, Dah-Ching AU - Ding DC AUID- ORCID: 0000-0001-5105-068X AD - Department of Obstetrics and Gynecology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Foundation and Tzu Chi University, Hualien. AD - Institute of Medical Sciences, Tzu Chi University, Hualien. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Cell Transplant JT - Cell transplantation JID - 9208854 RN - 0 (Retinal Pigments) SB - IM MH - Coculture Techniques MH - Epithelial Cells MH - Humans MH - *Mesenchymal Stem Cells MH - *Retinal Pigment Epithelium MH - Retinal Pigments/metabolism PMC - PMC8961389 OTO - NOTNLM OT - differentiation OT - mesenchymal stem cells OT - retinal pigment epithelium OT - transwell OT - umbilical cord COIS- Declaration of Conflicting Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. EDAT- 2022/03/25 06:00 MHDA- 2022/04/05 06:00 PMCR- 2022/03/24 CRDT- 2022/03/24 05:29 PHST- 2022/03/24 05:29 [entrez] PHST- 2022/03/25 06:00 [pubmed] PHST- 2022/04/05 06:00 [medline] PHST- 2022/03/24 00:00 [pmc-release] AID - 10.1177_09636897221085901 [pii] AID - 10.1177/09636897221085901 [doi] PST - ppublish SO - Cell Transplant. 2022 Jan-Dec;31:9636897221085901. doi: 10.1177/09636897221085901.