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Comparative evaluation of proliferative potential and replicative senescence associated changes in mesenchymal stem cells derived from dental pulp and umbilical cord

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Abstract

Mesenchymal stem cells (MSC) have been widely studied for tissue regeneration and cell-based therapy. MSC can be isolated from different body tissues while several biological waste sources like dental pulp, umbilical cord, cord derived blood, amniotic fluid or urine have also emerged as potential sources of MSCs. Specifically, isolation of MSCs from such non-conventional sources show promising outcomes due to the non-invasiveness of the extraction process and high proliferation capacity of the isolated MSC. However, these stem cells also exhibit the limitation of replicative senescence in long-term culture condition. Inter-cellular reactive oxygen species is an important contributor for inducing cellular senescence under long-term culture conditions. For translational application, it becomes imperative to compare the stem cells isolated from these sources for their senescence and proliferative properties. In this study, MSC were extracted from two different sources of biological waste materials—dental pulp and umbilical cord, and compared for their proliferation capacity and replicative senescence at different passage numbers (i.e. P2 and P6). Intracellular ROS production was significantly (p < 0.001) less in dental pulp stem cells culture in comparison to umbilical cord-derived stem cells at P6. The β-gal expression also showed significantly (p < 0.001) low expression in DPSC culture compared to that of UCSC at P6. The study indicates the source of stem cells influences the proliferation capacity as well as replicative senescence of MSCs. This study will thus pave the path of future research in selecting appropriate stem cell source for regenerative medicine application.

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Abbreviations

DCFDA:

2′,7′-Dichlorofluorescin diacetate

DAPI:

4,6-Diamidino-2-phenilindole

DIC microscopy:

Differential interference contrast microscopy

DPSC:

Dental pulp stem cell

PBS:

Phosphate buffer saline

IEC:

Institutional Ethics Committee

PDT:

Population doubling time

FOV:

Field of view

MSC:

Mesenchymal stem cell

ROS:

Reactive oxygen species

SA-β-gal:

Senescence associated β-galactosidase

UCSC:

Umbilical cord-derived stem cell

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Acknowledgements

The authors thankfully acknowledge the help and guidance extended by Prof. (Dr.) M Pal, Head, Dept. of Oral and Maxillofacial pathology and Prof (Dr.) G Kundu, Head, Dept. of Pedodontics and Preventive Dentistry, both from Guru Nanak Institute of Dental Sciences and Research, Kolkata, India.

Funding

We acknowledge Indian Council of Medical Research, Govt. of India for funding support.

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Correspondence to Ananya Barui or Ranjan Rashmi Paul.

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As per the Institute norms.

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Das, M., Das, A., Barui, A. et al. Comparative evaluation of proliferative potential and replicative senescence associated changes in mesenchymal stem cells derived from dental pulp and umbilical cord. Cell Tissue Bank 23, 157–170 (2022). https://doi.org/10.1007/s10561-021-09926-8

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  • DOI: https://doi.org/10.1007/s10561-021-09926-8

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