| ORIGINAL ARTICLE |
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| Year : 2023 | Volume
: 66
| Issue : 1 | Page : 14-20 |
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GATA-binding protein 4 promotes neuroinflammation and cognitive impairment in Aβ1–42 fibril-infused rats through small nucleolar RNA host gene 1/miR-361-3p axis
Lidan Liu1, Yanhui Peng1, Wenping Liu1, Jiajun Xu1, Dali Li1, Xiuwen Li2
1 Department of Internal Medicine-Neurology, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, China
2 Department of Rheumatology and Immunology, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, China
Correspondence Address:
Dr. Yanhui Peng
Department of Internal Medicine-Neurology, The Sixth Affiliated Hospital of Xinjiang Medical University, No. 39, Wuxing South Road, Tianshan, Urumqi, Xinjiang Uygur Autonomous Region
China
 Source of Support: None, Conflict of Interest: None
DOI: 10.4103/cjop.CJOP-D-22-00057
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Aging with dysregulated metabolic and immune homeostasis stimulates pyroptosis, neuroinflammation, and cellular senescence, thus contributing to etiopathogenesis of Alzheimer's disease. GATA-binding protein 4 (GATA4) functions as a transcriptional factor in response to DNA damage, and is associated with neuroinflammation and cellular senescence. The role of GATA4 in Alzheimer's disease was investigated. GATA4 was elevated in hippocampus of Aβ1–42 fibril-infused rats. Injection with shRNA targeting GATA4 reduced escape latency with increase of time in target quadrant and number of platform crossings in Aβ1–42 fibril-infused rats. Moreover, knockdown of GATA4 ameliorated morphological changes of hippocampus and reduced amyloid plaque deposition in Aβ1–42 fibril-infused rats. Silence of GATA4 repressed neuroinflammation and apoptosis in Aβ1–42 fibril-infused rats. Loss of GATA4 in Aβ1–42 fibril-infused rats reduced the expression of specificity protein 1 (Sp1) to downregulate long noncoding RNA small nucleolar RNA host gene 1 (SNHG1) and upregulated miR-361-3p. Loss of SNHG1 ameliorated learning and memory impairments in Aβ1–42 fibril-infused rats. Overexpression of Sp1 attenuated GATA4 silence-induced decrease of escape latency, increase of time in target quadrant, and number of platform crossings in Aβ1–42 fibril-infused rats. In conclusion, silence of GATA4 ameliorated cognitive dysfunction and inhibited hippocampal inflammation and cell apoptosis through regulation of Sp1/SNHG1/miR-361-3p.
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