생명과학회지 (Journal of Life Science)

  • 제26권12호
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  • Pages.1355-1359
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  • 2016
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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인간 골수유래-중간엽 줄기세포(hBM-MSCs)에서 PDE4 억제조절을 통한 신경세포 분화 효율 개선

Improvement of Neuronal Differentiation by PDE4 Inhibition in Human Bone Marrow-mesenchymal Stem Cells

  • Jeong, Da Hee (Department of Biology, College of Natural Science, Chosun University) ;
  • Joe, I-Seul (Department of Biology, College of Natural Science, Chosun University) ;
  • Cho, Goang-Won (Department of Biology, College of Natural Science, Chosun University)
  • 투고 : 2016.05.02
  • 심사 : 2016.09.05
  • 발행 : 2016.12.30
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초록

인간 중간엽 줄기세포(hMSCs)는 신경세포(neuron-like cells)를 포함한 다양한 세포로 분화할 수 있는 능력을 지닌 성체 줄기세포(adult stem cells)이다. 본 연구에서는 인간의 골수유래-중간엽 줄기세포(bone marrow-mesenchymal stem cells; hBM-MSCs)를 이용한 신경분화에서 신경세포 표지자(neuronal marker)인 NF-M, Tuj-1 뿐만 아니라 성상세포 표지자(glial marker)인 GFAP의 발현 역시 의미 있게 증가함을 real-time PCR, Western blot, and immunocytochemical staining법을 통하여 관찰하였다. 이를 개선하기 위하여, 신경분화에 중요한 신호전달자(signal intermediator)인 PDE4를 억제한 후 신경분화를 유도하였다. PDE4 억제자인 rolipram 혹은 resveratrol를 각각 처리하여 신경분화한 줄기세포(Roli- or RSV-dMSCs)에서 NF-M, Tuj-1의 발현이 증가하였고 반면, GFAP의 발현은 감소함을 real-time PCR, Western blot, and immunocytochemical staining법을 통하여 관찰하였다. 본 연구를 통하여, PDE4를 조절하며 줄기세포의 신경분화를 개선할 수 있음을 보였다.

Human bone marrow mesenchymal stem cells (hBM-MSCs) can differentiate into various cell types including osteoblasts, adipocytes, chondrocytes, and myocytes. Previous studies, including our own, have shown that MSCs can also differentiate into neuron-like cells. However, their rate of neuronal differentiation is not sufficient for application to stem cell therapy, which requires well-defined cell types. For this purpose, we first examined the expression of neuronal lineage markers (GFAP, MAP-2, KCNH1, Nestin, NF-M, and Tuj-1) by real-time PCR, western blot, and immunocytochemical staining. The expressions of the astrocyte marker GFAP and neuronal markers NF-M and Tuj-1 increased in neuronal differentiated MSCs (dMSCs). To improve the neuronal differentiation efficiency, PDE4, an important signaling intermediator in the progression of neuronal differentiation, was modulated using well-known inhibitors such as rolipram or resveratrol and then differentiated into neuronal cells (Roli- or RSV-dMSCs). The expressions of NF-M, Tuj-1 were increased while that of GFAP decreased in Roli- and RSV-dMSCs, which were examined by real-time PCR, western blot, and immunocytochemical staining. From these experiments, we have found that the neuronal differentiation efficiency can be ameliorated by the modulation of PDE4 activity.

키워드

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