Yonsei Med J.  2021 Oct;62(10):936-942. 10.3349/ymj.2021.62.10.936.

Influence of the Amount of Fresh Specimen on the Isolation of Tumor Mesenchymal Stem-Like Cells from High-Grade Glioma

Affiliations
  • 1Yonsei University College of Medicine, Seoul, Korea
  • 2Department of Neurosurgery, Brain Tumor Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
  • 3Department of Neurosurgery, Dong-A University College of Medicine, Busan, Korea
  • 4Department of Biostatistics, Graduate School of Public Health, Yonsei University, Seoul, Korea
  • 5Department of Biochemistry and Molecular Biology, Institute of Genetic Science, Integrated Genomic Research Center for Metabolic Regulation, Yonsei University College of Medicine, Seoul, Korea
  • 6Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
  • 7Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, Korea

Abstract

Purpose
A critical indicator of the overall survival of patients with high-grade glioma is the successful isolation of tumor mesenchymal stem-like cells (tMSLCs), which play important roles in glioma progression. However, attempts to isolate tMSLCs from surgical specimens have not always been successful, and the reasons for this remain unclear. Considering that the amount of surgical high-grade glioma specimens varies, we hypothesized that larger surgical specimens would be better for tMSLC isolation.
Materials and Methods
We assessed 51 fresh, high-grade glioma specimens and divided them into two groups according to the success or failure of tMSLC isolation. The success of tMSLC isolation was confirmed by plastic adherence, presenting antigens, tri-lineage differentiation, and non-tumorigenicity. Differences in characteristics between the two groups were tested using independent two sample t-tests, chi-square tests, or Kaplan-Meier survival analysis.
Results
The mean specimen weights of the groups differed from each other (tMSLC-negative group: 469.9±341.9 mg, tMSLC positive group: 546.7±618.9 mg), but the difference was not statistically significant. The optimal cut-off value of specimen weight was 180 mg, and the area under the curve value was 0.599.
Conclusion
Our results suggested a minimum criterion for specimen collection, and found that the specimen amount was not deeply related to tMSLC detection. Collectively, our findings imply that the ability to isolate tMSLCs is determined by factors other than the specimen amount.

Keyword

Glioblastoma; high-grade glioma; isolation rate; specimen weight; tumor mesenchymal stem-like cell
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