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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2025.3
- 수록면
- 189 - 196 (8page)
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초록· 키워드
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Background: Neuroglobin (Ngb) and growth-associated protein (GAP) 43 in neurons are associated with axonal regeneration. Korean Red Ginseng Extract (KRGE) enhances glial fibrillary acidic protein (GFAP)-positive astrocytes and hypoxia-inducible factor-1α (HIF-1α) protein activation in normoxic astrocytes. However, crosstalk between neural stem cell (NSC) differentiation and astrocytic HIF-1α in the KRGE-treated normoxic brain and retina remains unclear. We investigated whether KRGE-treated astrocytic HIF-1α can enhance NSC differentiation and increase the mature neurons expressing Ngb and GAP43.
Methods: Mature neuronal markers such as neuronal nuclei (NeuN) or microtubule-associated protein 2 (MAP2) were tested with Ngb in the mouse brain or retinal tissues post-KRGE administration. Direct KRGE treatment of NSCs or astrocytes was evaluated for Ngb levels. The KRGE-treated astrocyte conditioned media (ACM) were transferred to NSCs and HIF-1α levels were reduced using small interfering RNA transfection (si-HIF-1α) in astrocytes. si-HIF-1α-ACM with KRGE was tested for NSC differentiation.
Results: KRGE-administered mice showed significantly enhanced co-expression of Ngb with NeuN in the brain and MAP2 in the retina, along with the NSC marker Nestin, than water-administered mice. The KRGE treatment did not increase Ngb levels in NSCs, but stimulated astrocytes to secrete factors affecting NSCs’ differentiate into mature neurons and astrocytes. The KRGE-treated mouse retinas showed GFAP- and HIF-1α double-positive cells. Co-treatment with si-HIF-1α-transfected KRGE–ACM blocked KRGE–ACM-induced NSC differentiation into astrocytes or Ngb-expressing neurons.
Conclusion: KRGE stimulates astrocytic HIF-1α, which regulates NSC differentiation into mature neurons expressing Ngb, thereby promoting regeneration by enhancing NSC–astrocyte crosstalk in the physiological retina and brain.
Methods: Mature neuronal markers such as neuronal nuclei (NeuN) or microtubule-associated protein 2 (MAP2) were tested with Ngb in the mouse brain or retinal tissues post-KRGE administration. Direct KRGE treatment of NSCs or astrocytes was evaluated for Ngb levels. The KRGE-treated astrocyte conditioned media (ACM) were transferred to NSCs and HIF-1α levels were reduced using small interfering RNA transfection (si-HIF-1α) in astrocytes. si-HIF-1α-ACM with KRGE was tested for NSC differentiation.
Results: KRGE-administered mice showed significantly enhanced co-expression of Ngb with NeuN in the brain and MAP2 in the retina, along with the NSC marker Nestin, than water-administered mice. The KRGE treatment did not increase Ngb levels in NSCs, but stimulated astrocytes to secrete factors affecting NSCs’ differentiate into mature neurons and astrocytes. The KRGE-treated mouse retinas showed GFAP- and HIF-1α double-positive cells. Co-treatment with si-HIF-1α-transfected KRGE–ACM blocked KRGE–ACM-induced NSC differentiation into astrocytes or Ngb-expressing neurons.
Conclusion: KRGE stimulates astrocytic HIF-1α, which regulates NSC differentiation into mature neurons expressing Ngb, thereby promoting regeneration by enhancing NSC–astrocyte crosstalk in the physiological retina and brain.
목차
ABSTRACT
1. Introduction
2. Materials and methods
3. Results
4. Discussion
References
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