1
|
Sun X, Yang X, Gui W, Liu S, Gui Q. Sirtuins and autophagy in lipid metabolism. Cell Biochem Funct 2023; 41:978-987. [PMID: 37755711 DOI: 10.1002/cbf.3860] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/28/2023]
Abstract
Sirtuins are a family of NAD+ -dependent deacetylases that regulate some important biological processes, including lipid metabolism and autophagy, through their deacetylase function. Autophagy is a new discovery in the field of lipid metabolism, which may provide a new idea for the regulation of lipid metabolism. There are many tandem parts in the regulation process of lipid metabolism and autophagy of sirtuins protein family. This paper summarized these tandem parts and proposed the possibility of sirtuins regulating lipid autophagy, as well as the interaction and synergy between sirtuins protein family. Currently, some natural drugs have been reported to affect metabolism by regulating sirtuins, some of which regulate autophagy by targeting sirtuins.
Collapse
Affiliation(s)
- Xuan Sun
- Department of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Xiaoting Yang
- Department of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Wanfei Gui
- Department of Medicine, Chuanshan College, University of South China, Hengyang, China
| | - Songling Liu
- Department of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| | - Qingjun Gui
- Department of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, China
| |
Collapse
|
2
|
Wang L, Ni Z, Xiao Y, Li Y, Liu X, Chen Y, Cui S, Zhang D, Mi C, He Q. Numerical Strength Analysis of Laser-Welded Differential Housing and Gear Considering Residual Stress. Materials (Basel) 2023; 16:4721. [PMID: 37445035 DOI: 10.3390/ma16134721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/19/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023]
Abstract
In order to avoid slackening of differential housing and gear joined by bolts, the laser-welding process is proposed in this paper, and the strength of a connecting joint was estimated by numerical analysis with consideration of welding residual stress. The process parameters of laser welding for dissimilar materials QT600 cast iron and 20MnCr5 structural alloy steel were introduced, and chemical composition analysis and microstructure analysis were conducted on the welded joints. The finite element model of laser-welded differential housing and gear was established to obtain the welding residual stress by applying a moving heat source. To verify the accuracy of the simulated result, static pressing tests were employed. The maximum tensile residual stress was 319.4 MPa, located at the same point as the maximum temperature. The simulated stress agreed well with the experimental data. Finally, the dynamic strength of laser-welded differential housing and gear under forward, reverse, and start-up conditions was assessed by regarding welding residual stress as the initial stress field, which showed that all safety factors were greater than 1.4.
Collapse
Affiliation(s)
- Liuping Wang
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
| | - Zhengshun Ni
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
| | - Yingang Xiao
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
| | - Yongqiang Li
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
| | - Xianghuan Liu
- Laser Welding Department, Zhuzhou Gear Co., Ltd., Zhuzhou 412007, China
| | - Yongzhi Chen
- Laser Welding Department, Zhuzhou Gear Co., Ltd., Zhuzhou 412007, China
| | - Shuanghao Cui
- Laser Welding Department, Zhuzhou Gear Co., Ltd., Zhuzhou 412007, China
| | - Dejun Zhang
- Laser Welding Department, Zhuzhou Gear Co., Ltd., Zhuzhou 412007, China
| | - Chengji Mi
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
- Laser Welding Department, Zhuzhou Gear Co., Ltd., Zhuzhou 412007, China
| | - Quanguo He
- College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
| |
Collapse
|