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- 저자 : Wu Liangyu (검색결과 3 건)
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Jasmine tea extract enhances human retinal pigment epithelial cells survival after UVB irradiation
Shang Hu,Guo Yaling,Wu Liangyu,Lin Jinke 한국응용생명화학회 2023 Applied Biological Chemistry (Appl Biol Chem) Vol.66 No.-
To examine the protecting effect of jasmine tea extract (JTE) against ultraviolet B (UVB) induced damage on human retinal pigment epithelial (RPE) cells, the RPE cells were subjected to UVB exposure and sequential JTE administration. The cell viability, intracellular reactive oxygen species (ROS), and apoptosis were determined by MTT, 2ʹ,7ʹ-dichlorodihydrofluorescein diacetate and flow cytometer assays, respectively. Further, the cells treated with UVB irradiation and sequential JTE administration were subjected to RNA-sequencing analysis in order to identify genes and pathways involved in the UVB-induced damage and JTE protecting mechanisms. The results showed that JTE effectively attenuated the UVB-induced cell injury by reducing the excessive intracellular ROS generation, and inhibiting the expression of apoptotic genes such as Bax, Caspase-3/9. This finding may offer a promising candidate for the prevention of UVB exposure related eye diseases.
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Xylazole inhibits NO-cGMP pathway in fetal rat nerve cells
Xinyu Wang,Yue Wu,Lin Liu,Hui Bai,Zhiheng Zhang,Mingchao Zhao,Tianwen Ma,Xiaopeng Song,Lina Jia,Liangyu Lv,Yue Yu,Xinyu Xu,Hong Chen,Li Gao 대한수의학회 2022 Journal of Veterinary Science Vol.23 No.1
Background: Xylazole (Xyl) is a veterinary anesthetic that is structurally and functionally similar to xylazine. However, the effects of Xyl in vitro remain unknown. Objectives: This study aimed to investigate the anesthetic mechanism of Xyl using fetal rat nerve cells treated with Xyl. Methods: Fetal rat nerve cells cultured for seven days were treated with 10, 20, 30, and 40 μg/ mL Xyl for 0, 5, 10, 15, 20, 25, 30, 45, 60, 90, and 120 min. Variations of amino acid neurotransmitters (AANTs), Nitric oxide-Cyclic GMP (NO-cGMP) signaling pathway, and ATPase were evaluated. Results: Xyl decreased the levels of cGMP and NO in nerve cells. Furthermore, Xyl affected the AANT content and Na+-K+-ATPase and Ca2+-Mg2+-ATPase activity in nerve cells. These findings suggested that Xyl inhibited the NO-cGMP signaling pathway in nerve cells in vitro. Conclusions: This study provided new evidence that the anesthetic and analgesic effects of Xyl are related to the inhibition of the NO-cGMP signaling pathway.
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Chen Guoliang,Li Xianlong,Zhu Hongzhang,Wu Huachuan,He Dacheng,Shi Liangyu,Wei Fuxin,Liu Xizhe,Chen Ningning,Liu Shaoyu 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
The poor survival and low efficiency of neuronal differentiation limits the therapeutic effects of transplanted neural stem cells in the treatment of spinal cord injury. Neurofibromatosis-1 (NF-1) is a tumor suppressor gene that restricts the rapid and abnormal growth and differentiation of neural cells. In the present study, lentiviral vectors were used to knock out NF-1, Ricotr (the core member of mTORC2) or NF-1+Ricotr in neural stem cells in vitro, and the NF-1, Ricotr or NF-1+Ricotr knockout neural stem cells were transplanted at the lesion site in a rat model of spinal cord injury (SCI). We first demonstrated that targeted knockout of NF-1 had an antiapoptotic effect and improved neuronal differentiation by enhancing the mTORC2/Rictor pathway of neural stem cells in vitro. Subsequently, transplanting NF-1 knockout neural stem cells into the injured site sufficiently promoted the tissue repair and functional recovery of rats with spinal cord injury by enhancing the survival and neuronal differentiation of grafted neural stem cells. Collectively, these findings reveal a prominent role of NF-1 in neural stem cell biology, which is an invaluable step forward in enhancing the benefit of neural stem cell-mediated regenerative cell therapy for spinal cord injury and identifies the transplantation of NF-1 knockout neural stem cells as a promising strategy for spinal cord injury.
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