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Chen XL, Ge F, Wan MQ, Qi SM, Qi ZL. [Lactate promotes HMGB1 phosphorylation and release via Akt signaling pathway in gastric cancer cells HGC-27]. Zhonghua Zhong Liu Za Zhi 2023; 45:919-925. [PMID: 37968076 DOI: 10.3760/cma.j.cn112152-20220901-00590] [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] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Objective: To investigate the molecular mechanism of how lactate induces high mobility group box 1 (HMGB1) release. Methods: Gastric cancer HGC-27 cells were divided into the control group and the lactate group (The cells were treated with lactate for 6 h). The level of HMGB1 in the cell culture medium was detected by enzyme-linked immunosorbent assay (ELISA), the localization of HMGB1 was detected using laser confocal microscopy, and the nuclear translocation of HMGB1 was detected using the nucleoplasmic separation assay. The phosphorylation and acetylation levels of HMGB1 were determined by co-immunoprecipitation, and Western blot was used to measure the phosphorylation of Akt and protein kinase C (PKC). HGC-27 cells were first treated with lactate and LY294002, the inhibitor of Akt, and then the phosphorylation of HMGB1 and Akt was analyzed by co-immunoprecipitation and Western blot, respectively. The localization of HMGB1 in cells was detected by laser confocal microscopy. EdU and Transwell assays were used to detect the proliferation and migration abilities of HGC-27 cells, respectively. HGC-27 cells were then injected into the BALB/C null mice for subcutaneous tumor implantation. Mice in the lactate group were intraperitoneally injected with lactate (0.2 g/kg/2 d), while those in the control group were intraperitoneally injected with an equal amount of PBS for 20 consecutive days. ELISA was used to detect the HMGB1 levels in the blood samples taken from the medial canthus vein of the mice, while co-immunoprecipitation and Western blot were used to detect the phosphorylation of HMGB1 and Akt in tumor tissue proteins, respectively. Results: The release levels of HMGB1 in the lactate group were (2 995.00±660.91) pg/ml and (696.33±22.03) pg/ml, after lactate treatment for 6 h and 12 h, respectively, both higher than those in the control group (485.00±105.83) pg/ml (P<0.001 and P=0.028, respectively). After lactate treatment for 6 h, the relative expression of HMGB1 protein in the cytoplasm of HGC-27 cells was 1.13±0.09, higher than that of the control group (0.83±0.07, P=0.001), while the relative expression of HMGB1 in the nucleus was 0.79±0.06, lower than that of the control group (1.07±0.06, P=0.007). The phosphorylation level of HMGB1 reached 1.41±0.09, which was higher than that of the control group (0.97±0.10, P=0.031). The phosphorylation level of Akt was 11.16±0.06, higher than that of the control group (0.91±0.022, P=0.002). The phosphorylation level and nuclear translocation of HMGB1 induced by lactate decreased obviously after Akt inhibition; the proliferation and migration abilities induced by lactate were also obviously inhibited after Akt inhibition. In vivo, the HMGB1 level in the peripheral blood was (1 280.70±389.66) pg/ml in the lactate group, which was obviously higher than that in the control group (595.11±44.75) pg/ml (P=0.008), and the phosphorylation levels of HMGB1 and Akt in tumor tissues in the lactate group were obviously enhanced compared with the control group. Conclusion: Lactate induces HMGB1 release through enhancing HMGB1 phosphorylation via the Akt signaling pathway.
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Affiliation(s)
- X L Chen
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China
| | - F Ge
- School of Pharmacy, Wannan Medical College, Wuhu 241002, China
| | - M Q Wan
- School of Pharmacy, Wannan Medical College, Wuhu 241002, China
| | - S M Qi
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China
| | - Z L Qi
- Department of Biochemistry and Molecular Biology, Wannan Medical College, Wuhu 241002, China
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Liu XY, Zhang YB, Yang XW, Wu XW, Yang YF, Xu W, Wan MQ, Gong Y, Liu NF, Zhang P. Biological analysis of constituents in Spatholobi Caulis by UFLC-MS/MS: Enhanced quantification and application to permeability properties study in Caco-2 cell monolayer model. J Pharm Biomed Anal 2023; 226:115235. [PMID: 36680806 DOI: 10.1016/j.jpba.2023.115235] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/26/2022] [Accepted: 01/02/2023] [Indexed: 01/18/2023]
Abstract
Major chemical constituents in medicinal materials are often used as the marker compounds of traditional Chinese medicine (TCM) for treating various diseases. For spatholobi caulis (SPC), it contains a variety of flavones, phenolic acid esters, and lignans which exert many pharmacological effects. However, the absorption and permeability properties of these constituents of SPC are still unclear and require further investigation. Different types and major compounds of SPC were chosen as representative constituents to study their absorption and transepithelial transport characteristics in the human intestinal epithelium-like Caco-2 cell monolayer model. 35 constituents of SPC were evaluated by using ultra fast liquid chromatography combined with electrospray ionization triple quadrupole tandem mass spectrometry (UFLC-MS/MS) method, acetonitrile and water containing with 0.5 mM ammonium acetate were used as mobile phase, these analytes with good linear relationships (R2 was within 0.9967-0.9998), precision (CV values were less than 10.23 %, LLOQ was less than 13.69 %), accuracy (Mean of inter- and intra-day were within 85.02 %-111.61 % and 85.50-112.97 %, respectively) and stability (The mean was within 85.07 %-113.93 %), among which 16 analytes showed good permeability, 5 analytes were considered to be poorly permeable compounds, and the other 14 analytes were assigned for the moderately absorbed compounds in Caco-2 cell monolayer model. The further results showed that the absorption mechanism of 7 well absorbed compounds, 8-O-methylretusin (1), genistein (7), spasuberol B (16), naringenin (18), isoliquiritigenin (19), 4-hydroxy-3-methoxy cinnamic acid methyl ester (23) and (+)-epipinoresinol (31) in SPC was mainly passive diffusion, their bidirectional transport rate was correlated with the concentration and transport time. The chemical structures of these compounds could affect the permeability properties on the cell monolayer. This study demonstrated the utility of Caco-2 cell monolayer model for evaluating the absorption properties and initial mechanisms of compounds in SPC in vitro, and provided important basis for predicting oral bioavailability of SPC compounds.
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Affiliation(s)
- Xiao-Yan Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing 100191, China
| | - You-Bo Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing 100191, China
| | - Xiu-Wei Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing 100191, China.
| | - Xiu-Wen Wu
- School of Pharmaceutical Sciences, Hebei Medical University, Shijiazhuang 050017, China
| | - Yan-Fang Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing 100191, China
| | - Wei Xu
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, Beijing 100191, China
| | - Mei-Qi Wan
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yun Gong
- Zhuzhou Qianjin Pharmaceutical Co., Ltd., Zhuzhou 412003, China
| | - Ni-Fu Liu
- Zhuzhou Qianjin Pharmaceutical Co., Ltd., Zhuzhou 412003, China
| | - Peng Zhang
- Zhuzhou Qianjin Pharmaceutical Co., Ltd., Zhuzhou 412003, China
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Ong LZ, Tambyah PA, Lum LH, Low ZJ, Cheng I, Murali TM, Wan MQ, Chua HR. Aminoglycoside-associated acute kidney injury in elderly patients with and without shock. J Antimicrob Chemother 2016; 71:3250-3257. [PMID: 27494924 DOI: 10.1093/jac/dkw296] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 06/01/2016] [Accepted: 06/21/2016] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Multiresistant Gram-negative pathogens pose major healthcare concerns with a limited therapeutic armamentarium. Aminoglycosides (AG) are under-utilized due to nephrotoxicity. We aimed to evaluate AG-associated acute kidney injury (AG-AKI) in elderly inpatients, with and without shock. METHODS We examined the incidence and predictors of AG-AKI by KDIGO criteria and extended renal dysfunction (ERD) in patients aged >60 years. ERD represented a composite of hospital mortality or absence of renal recovery over 6 months following AG-AKI. RESULTS Two hundred and seventy-eight patients (aged 74 ± 8 years) were studied; 43% and 19% received >7 and >10 days of AG therapy, respectively, and 70% gentamicin (versus amikacin). Thirteen per cent had shock and 17% developed AG-AKI. Comparing all patients with shock versus no shock, AG-AKI developed in 33% versus 14%, respectively (P = 0.005); correspondingly among 47 patients with AG-AKI, more with shock had stage 2/3 AKI (92% versus 43%) and dialysis (50% versus 9%) (P < 0.01), but more had other strong AKI confounders than AG therapy alone (83% versus 40%, P = 0.02). Multivariate analyses identified mechanical ventilation, frusemide administration and AG therapy >10 days as predictors of AG-AKI (P < 0.05), whereas shock, pneumonia and frusemide administration predicted more severe stage 2/3 AG-AKI (P < 0.05). Hospital mortality was 30% versus 7% with AG-AKI versus none (P < 0.001). Twenty-three of 211 (11%) patients with extended analysis had ERD, with 47% experiencing renal recovery following AG-AKI. Mechanical ventilation and contrast administration during index hospitalization predicted ERD (P < 0.05). CONCLUSIONS AG-AKI is common in the elderly, with a significant risk of ERD, but the cause and severity are greatly influenced by critical illness and shock, more so than AG therapy alone.
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Affiliation(s)
- Li-Zhen Ong
- Department of Laboratory Medicine, National University Hospital, Singapore
| | - Paul A Tambyah
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Infectious Diseases, Department of Medicine, National University Hospital, Singapore
| | - Lionel H Lum
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Infectious Diseases, Department of Medicine, National University Hospital, Singapore
| | - Zhen-Jie Low
- NUS High School of Mathematics and Science, Singapore
| | - Ivy Cheng
- NUS High School of Mathematics and Science, Singapore
| | - Tanusya M Murali
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Nephrology, Department of Medicine, National University Hospital, Singapore
| | - Mei-Qi Wan
- Department of Pharmacy, National University Hospital, Singapore
| | - Horng-Ruey Chua
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore .,Division of Nephrology, Department of Medicine, National University Hospital, Singapore
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