Open Access

Enzyme‑injected method of enzymatic dispersion at low temperature is effective for isolation of smooth muscle cells from human esophagogastric junction

  • Authors:
    • Yang Gao
    • Jun‑Feng Liu
    • Chao Zhang
    • Liang Liu
    • Yue‑Ping Liu
    • Sheng‑Lei Zhang
    • Lian‑Mei Zhao
  • View Affiliations

  • Published online on: February 26, 2020     https://doi.org/10.3892/etm.2020.8560
  • Pages: 2933-2948
  • Copyright: © Gao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study was conducted to examine the feasibility of in vitro isolation and primary culture of smooth muscle cells (SMCs) from the esophagogastric junction (EGJ). Smooth muscles of EGJ were harvested from 23 patients with esophageal cancer during esophagostomy from January 2015 to December 2017. Enzymatic dispersion (ED) was performed for isolation. Collagenase II and Trypsin/EDTA were applied by enzyme injection (EI) into tissue fragments or immersion of tissue fragments into enzyme solution. Growth characteristics and proliferation [Cell Counting Kit‑8 (CCK‑8)] of cells were recorded for both smooth muscle cell medium (SMCM) and DMEM/F12 containing 10% newborn bovine serum (10%‑F12). All ED methods could isolate primary cells; EI was the most effective method with low collagenase II concentration (0.5 mg/ml) at 4˚C for 14‑24 h. Primary cells demonstrated mainly spindle‑ and long‑spindle‑shaped with ‘hills and valleys’ morphology. The CCK‑8 assay in SMCM showed better proliferation results than in 10%‑F12. After passaging for 4‑8 generations in SMCM or 2‑4 generations in 10%‑F12, cells enlarged gradually with passages and lost spindle structures. mRNA and proteins of α‑smooth muscle actin (α‑SMA), smooth muscle 22 α (SM22α), vimentin, desmin, CD90 and proliferating cell nuclear antigen were detected in tissues and cells with different levels of expression. SMCs of esophageal circular muscle, esophageal longitudinal muscle, gastric circular muscle near sling in gastric bottom and gastric circular muscle near clasp in lesser gastric curvature, all cultured in 10%‑F12, exhibited superior smooth muscle phenotypes compared with SMCs cultured in SMCM in terms of α‑SMA, SM22α and vimentin expression. The EI method of ED at low temperature appears effective for isolation and primary culture of SMCs from human EGJ in vitro.
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April-2020
Volume 19 Issue 4

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Gao Y, Liu JF, Zhang C, Liu L, Liu YP, Zhang SL and Zhao LM: Enzyme‑injected method of enzymatic dispersion at low temperature is effective for isolation of smooth muscle cells from human esophagogastric junction. Exp Ther Med 19: 2933-2948, 2020
APA
Gao, Y., Liu, J., Zhang, C., Liu, L., Liu, Y., Zhang, S., & Zhao, L. (2020). Enzyme‑injected method of enzymatic dispersion at low temperature is effective for isolation of smooth muscle cells from human esophagogastric junction. Experimental and Therapeutic Medicine, 19, 2933-2948. https://doi.org/10.3892/etm.2020.8560
MLA
Gao, Y., Liu, J., Zhang, C., Liu, L., Liu, Y., Zhang, S., Zhao, L."Enzyme‑injected method of enzymatic dispersion at low temperature is effective for isolation of smooth muscle cells from human esophagogastric junction". Experimental and Therapeutic Medicine 19.4 (2020): 2933-2948.
Chicago
Gao, Y., Liu, J., Zhang, C., Liu, L., Liu, Y., Zhang, S., Zhao, L."Enzyme‑injected method of enzymatic dispersion at low temperature is effective for isolation of smooth muscle cells from human esophagogastric junction". Experimental and Therapeutic Medicine 19, no. 4 (2020): 2933-2948. https://doi.org/10.3892/etm.2020.8560