PMID- 24068884 OWN - NLM STAT- MEDLINE DCOM- 20140415 LR - 20220321 IS - 1537-744X (Electronic) IS - 2356-6140 (Print) IS - 1537-744X (Linking) VI - 2013 DP - 2013 TI - Hypoxic culture conditions as a solution for mesenchymal stem cell based regenerative therapy. PG - 632972 LID - 10.1155/2013/632972 [doi] LID - 632972 AB - Cell-based regenerative therapies, based on in vitro propagation of stem cells, offer tremendous hope to many individuals suffering from degenerative diseases that were previously deemed untreatable. Due to the self-renewal capacity, multilineage potential, and immunosuppressive property, mesenchymal stem cells (MSCs) are considered as an attractive source of stem cells for regenerative therapies. However, poor growth kinetics, early senescence, and genetic instability during in vitro expansion and poor engraftment after transplantation are considered to be among the major disadvantages of MSC-based regenerative therapies. A number of complex inter- and intracellular interactive signaling systems control growth, multiplication, and differentiation of MSCs in their niche. Common laboratory conditions for stem cell culture involve ambient O(2) concentration (20%) in contrast to their niche where they usually reside in 2-9% O(2). Notably, O(2) plays an important role in maintaining stem cell fate in terms of proliferation and differentiation, by regulating hypoxia-inducible factor-1 (HIF-1) mediated expression of different genes. This paper aims to describe and compare the role of normoxia (20% O(2)) and hypoxia (2-9% O(2)) on the biology of MSCs. Finally it is concluded that a hypoxic environment can greatly improve growth kinetics, genetic stability, and expression of chemokine receptors during in vitro expansion and eventually can increase efficiency of MSC-based regenerative therapies. FAU - Haque, Nazmul AU - Haque N AD - Regenerative Dentistry Research Group, Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia ; Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia. FAU - Rahman, Mohammad Tariqur AU - Rahman MT FAU - Abu Kasim, Noor Hayaty AU - Abu Kasim NH FAU - Alabsi, Aied Mohammed AU - Alabsi AM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20130827 PL - United States TA - ScientificWorldJournal JT - TheScientificWorldJournal JID - 101131163 RN - 0 (Reactive Oxygen Species) RN - 0 (Receptors, Chemokine) RN - 0 (Receptors, Notch) RN - S88TT14065 (Oxygen) SB - IM MH - Cell Culture Techniques MH - Cell Hypoxia MH - Cell Proliferation MH - Genomic Instability MH - Mesenchymal Stem Cells/*cytology MH - Models, Biological MH - Oxygen/metabolism MH - Reactive Oxygen Species/metabolism MH - Receptors, Chemokine/genetics/metabolism MH - Receptors, Notch/metabolism MH - Regenerative Medicine/methods MH - Signal Transduction MH - Up-Regulation PMC - PMC3771429 EDAT- 2013/09/27 06:00 MHDA- 2014/04/16 06:00 PMCR- 2013/08/27 CRDT- 2013/09/27 06:00 PHST- 2013/07/03 00:00 [received] PHST- 2013/07/26 00:00 [accepted] PHST- 2013/09/27 06:00 [entrez] PHST- 2013/09/27 06:00 [pubmed] PHST- 2014/04/16 06:00 [medline] PHST- 2013/08/27 00:00 [pmc-release] AID - 10.1155/2013/632972 [doi] PST - epublish SO - ScientificWorldJournal. 2013 Aug 27;2013:632972. doi: 10.1155/2013/632972. eCollection 2013.