Cited by 63Mesenchymal stem cell researchAdipose Tissue and MetabolismCancer Cells and Metastasis

In Situ Normoxia Enhances Survival and Proliferation Rate of Human Adipose Tissue-Derived Stromal Cells without Increasing the Risk of Tumourigenesis

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Choi, Jane Ru, Pingguan-Murphy, Belinda, Wan Abas, Wan Abu Bakar, Yong, Kar Wey, Poon, Chi Tat, Noor Azmi, Mat Adenan, Omar, Siti Zawiah, Chua, Kien Hui +2 more·2015·PLOS ONE

Abstract

Adipose tissue-derived stromal cells (ASCs) natively reside in a relatively low-oxygen tension (i.e., hypoxic) microenvironment in human body. Low oxygen tension (i.e., in situ normoxia), has been known to enhance the growth and survival rate of ASCs, which, however, may lead to the risk of tumourigenesis. Here, we investigated the tumourigenic potential of ASCs under their physiological condition to ensure their safe use in regenerative therapy. Human ASCs isolated from subcutaneous fat were cultured in atmospheric O2 concentration (21% O2) or in situ normoxia (2% O2). We found that ASCs retained their surface markers, tri-lineage differentiation potential, and self-renewal properties under in situ normoxia without altering their morphology. In situ normoxia displayed a higher proliferation and viability of ASCs with less DNA damage as compared to atmospheric O2 concentration. Moreover, low oxygen tension significantly up-regulated VEGF and bFGF mRNA expression and protein secretion while reducing the expression level of tumour suppressor genes p16, p21, p53, and pRb. However, there were no significant differences in ASCs telomere length and their relative telomerase activity when cultured at different oxygen concentrations. Collectively, even with high proliferation and survival rate, ASCs have a low tendency of developing tumour under in situ normoxia. These results suggest 2% O2 as an ideal culture condition for expanding ASCs efficiently while maintaining their characteristics.

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Authors
Choi, J. R., Pingguan-Murphy, B., Wan Abas, W. A. B., Yong, K. W., Poon, C. T., Noor Azmi, M. A., Omar, S. Z., Chua, K. H., Xu, F., & Wan Safwani, W. K. Z.
Affiliations
  • University of Malaya (MY)
  • National University of Malaysia (MY)
  • Xi'an Jiaotong University (CN)
Venue
PLOS ONE
Published
2015-01-23
Volume
10
Issue
1
Pages
e0115034
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2040318031
Cited by
63
References
77
Citations by year
2026: 1 · 2024: 2 · 2023: 6 · 2022: 6 · 2021: 8 · 2020: 8 · 2019: 6 · 2018: 12 · 2017: 5 · 2016: 5 · 2015: 4
FWCI
4.85
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • The University of Malaya Research Repository (University of Malaya) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • Greater South Information System
Funders
  • National Natural Science Foundation of China (111 Project, 11120101002, 11372243, B06024)
  • Universiti Malaya (UM.C/HIR/MOHE/ENG/44)
  • Higher Education Discipline Innovation Project (B06024)
Topics
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
Keywords
adipose tissue-derived stromal cells, low oxygen tension, tumourigenesis, cell proliferation, cell survival, DNA damage, vascular endothelial growth factor, basic fibroblast growth factor, tumor suppressor, telomere length, telomerase activity, cell expansion
MeSH terms
Adipose Tissue, Adult, Cells, Cultured, Female, Humans, Oxygen, Cell Hypoxia, Telomerase, Tumor Suppressor Proteins, Vascular Endothelial Growth Factor A, Cell Proliferation, Telomere Homeostasis, Mesenchymal Stem Cells, Carcinogenesis

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