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Zhang H, Chen Q, Hu D, Lai J, Yan M, Wu Z, Yang Z, Zheng S, Liu W, Zhang L, Bai L. Manipulating HGF signaling reshapes the cirrhotic liver niche and fills a therapeutic gap in regeneration mediated by transplanted stem cells. Exp Cell Res 2024; 434:113867. [PMID: 38043723 DOI: 10.1016/j.yexcr.2023.113867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 11/22/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
Long-term stem cell survival in the cirrhotic liver niche to maintain therapeutic efficacy has not been achieved. In a well-defined diethylnitrosamine (DEN)-induced liver fibrosis/cirrhosis animal model, we previously showed that liver-resident stem/progenitor cells (MLpvNG2+ cells) or immune cells have improved survival in the fibrotic liver environment but died via apoptosis in the cirrhotic liver environment, and increased levels of hepatocyte growth factor (HGF) mediated this cell death. We tested the hypothesis that inhibiting HGF signaling during the cirrhotic phase could keep the cells alive. We used adeno-associated virus (AAV) vectors designed to silence the c-Met (HGF-only receptor) gene or a neutralizing antibody (anti-cMet-Ab) to block the c-Met protein in the DEN-induced liver cirrhosis mouse model transplanted with MLpvNG2+ cells between weeks 6 and 7 after DEN administration, which is the junction of liver fibrosis and cirrhosis at the site where most intrahepatic stem cells move toward apoptosis. After 4 weeks of treatment, the transplanted MLpvNG2+ cells survived better in c-Met-deficient mice than in wild-type mice, and cell activity was similar to that of the mice that received MLpvNG2+ cells at 5 weeks after DEN administration (liver fibrosis phase when most of these cells proliferated). Mechanistically, a lack of c-Met signaling remodeled the cirrhotic environment, which favored transplanted MLpvNG2+ cell expansion to differentiation into mature hepatocytes and initiate endogenous regeneration by promoting mature host hepatocyte generation and mediating functional improvements. Therapeutically, c-Met-mediated regeneration can be mimicked by anti-cMet-Ab to interfere functions, which is a potential drug for cell-based treatment of liver fibrosis/cirrhosis.
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Affiliation(s)
- Hongyu Zhang
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Quanyu Chen
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Deyu Hu
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China; Bioengineering College, Chongqing University, No. 175 Gaotan, ShapingBa Distract, Chongqing 400044, China
| | - Jiejuan Lai
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Min Yan
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China; Department of Specific Medicine, the First Hospital of Shanxi Medical University, Taiyuan, 030000, China
| | - Zhifang Wu
- Department of Specific Medicine, the First Hospital of Shanxi Medical University, Taiyuan, 030000, China
| | - Zhiqing Yang
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Shuguo Zheng
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Wei Liu
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Leida Zhang
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China
| | - Lianhua Bai
- Hepatobiliary Institute, Southwest Hospital, Army Medical University, No. 30 Gaotanyan, ShapingBa District, Chongqing 400038, China; Bioengineering College, Chongqing University, No. 175 Gaotan, ShapingBa Distract, Chongqing 400044, China; Department of Specific Medicine, the First Hospital of Shanxi Medical University, Taiyuan, 030000, China.
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Cui YY. Sequential extraction of RNA, DNA and protein from cultured cells of the same group. World J Methodol 2023; 13:484-491. [PMID: 38229947 PMCID: PMC10789102 DOI: 10.5662/wjm.v13.i5.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/25/2023] [Accepted: 10/16/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Efficient extraction of nucleic acids and proteins (ENAP) from cells is a prerequisite for precise annotation of gene function, and has become laboratory routine for revealing the mysteries of life. However, cell samples are often from different culture dishes, resulting in inevitable experimental errors and sometimes poor repeatability.
AIM To explore a method to improve the efficiency of ENAP, minimizing errors in ENAP processes, enhancing the reliability and repeatability of subsequent experimental results.
METHODS A protocol for the sequential isolation of RNA, DNA, and proteins from the same cultured HepG2 cells using RNAzol reagent is presented here. The first step involves culturing HepG2 cells to the exponential phase, followed by the sequential isolation of RNA, DNA, and proteins from the same cultured cells in the second step. The yield of nucleic acids and proteins is detected in the third step, and their purity and integrity are verified in the last step.
RESULTS The procedure takes as few as 3-4 d from the start to quality verification and is highly efficient. In contrast to the existing kits and reagents, which are primarily based on independent isolation, this RNAzol reagent-based method is characterized by the sequential isolation of RNA, DNA, and proteins from the same cells, and therefore saves time, and has low cost and high efficiency.
CONCLUSION The RNA, DNA, and proteins isolated using this method can be used for reverse transcription-polymerase chain reaction, polymerase chain reaction, and western blotting, respectively.
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Affiliation(s)
- Ying-Yu Cui
- Department of Cell Biology, Institute of Medical Genetics, Key Laboratory of Arrhythmias of the Ministry of Education of China, Tongji University School of Medicine, Shanghai 200331, China
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