PMID- 37089095 OWN - NLM STAT- MEDLINE DCOM- 20230425 LR - 20230425 IS - 0371-0874 (Print) IS - 0371-0874 (Linking) VI - 75 IP - 2 DP - 2023 Apr 25 TI - [Isolation, culture and validation of CD34(+) vascular wall-resident stem cells from mice]. PG - 205-215 AB - Vascular wall-resident stem cells (VW-SCs) play a critical role in maintaining normal vascular function and regulating vascular repair. Understanding the basic functional characteristics of the VW-SCs will facilitate the study of their regulation and potential therapeutic applications. The aim of this study was to establish a stable method for the isolation, culture, and validation of the CD34(+) VW-SCs from mice, and to provide abundant and reliable cell sources for further study of the mechanisms involved in proliferation, migration and differentiation of the VW-SCs under various physiological and pathological conditions. The vascular wall cells of mouse aortic adventitia and mesenteric artery were obtained by the method of tissue block attachment and purified by magnetic microbead sorting and flow cytometry to obtain the CD34(+) VW-SCs. Cell immunofluorescence staining was performed to detect the stem cell markers (CD34, Flk-1, c-kit, Sca-1), smooth muscle markers (SM22, SM MHC), endothelial marker (CD31), and intranuclear division proliferation-related protein (Ki-67). To verify the multipotency of the isolated CD34(+) VW-SCs, endothelial differentiation medium EBM-2 and fibroblast differentiation medium FM-2 were used. After culture for 7 days and 3 days respectively, endothelial cell markers and fibroblast markers of the differentiated cells were evaluated by immunofluorescence staining and q-PCR. Furthermore, the intracellular Ca(2+) release and extracellular Ca(2+) entry signaling were evaluated by TILLvisION system in Fura-2/AM loaded cells. The results showed that: (1) High purity (more than 90%) CD34(+) VW-SCs from aortic adventitia and mesenteric artery of mice were harvested by means of tissue block attachment method and magnetic microbead sorting; (2) CD34(+) VW-SCs were able to differentiate into endothelial cells and fibroblasts in vitro; (3) Caffeine and ATP significantly activated intracellular Ca(2+) release from endoplasmic reticulum of CD34(+) VW-SCs. Store-operated Ca(2+) entry (SOCE) was activated by using thapsigargin (TG) applied in Ca(2+)-free/Ca(2+) reintroduction protocol. This study successfully established a stable and efficient method for isolation, culture and validation of the CD34(+) VW-SCs from mice, which provides an ideal VW-SCs sources for the further study of cardiovascular diseases. FAU - Yang, Li-Ju AU - Yang LJ AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. AD - Department of Cardiology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China. FAU - Ma, Ying AU - Ma Y AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. FAU - Li, Yuan AU - Li Y AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. FAU - Dang, Qing-Ya AU - Dang QY AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. FAU - Cheng, Jun AU - Cheng J AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. FAU - Yang, Yan AU - Yang Y AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. FAU - Li, Peng-Yun AU - Li PY AD - Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China. lpyun@swmu.edu.cn. LA - chi PT - English Abstract PT - Journal Article PL - China TA - Sheng Li Xue Bao JT - Sheng li xue bao : [Acta physiologica Sinica] JID - 20730130R RN - 0 (Antigens, CD34) SB - IM MH - Mice MH - Animals MH - *Endothelial Cells MH - Cell Differentiation/physiology MH - *Stem Cells MH - Adventitia MH - Fibroblasts MH - Cells, Cultured MH - Antigens, CD34/metabolism EDAT- 2023/04/24 06:41 MHDA- 2023/04/25 06:42 CRDT- 2023/04/24 03:12 PHST- 2023/04/25 06:42 [medline] PHST- 2023/04/24 06:41 [pubmed] PHST- 2023/04/24 03:12 [entrez] PST - ppublish SO - Sheng Li Xue Bao. 2023 Apr 25;75(2):205-215.