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Han WM, Hong YX, Xiao GS, Wang RY, Li G. NMDARs activation regulates endothelial ferroptosis via the PP2A-AMPK-HMGB1 axis. Cell Death Discov 2024; 10:34. [PMID: 38233385 PMCID: PMC10794209 DOI: 10.1038/s41420-023-01794-3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 12/08/2023] [Accepted: 12/21/2023] [Indexed: 01/19/2024] Open
Abstract
N-methyl-D-aspartate receptors (NMDARs) are ligand-gated, voltage-dependent channels of the ionotropic glutamate receptor family. The present study explored whether NMDAR activation induced ferroptosis in vascular endothelial cells and its complicated mechanisms in vivo and in vitro. Various detection approaches were used to determine the ferroptosis-related cellular iron content, lipid reactive oxygen species (LOS), siRNA molecules, RNA-sequence, MDA, GSH, and western blotting. The AMPK activator Acadesine (AICAR), HMGB1 inhibitor glycyrrhizin (GLY), PP2A inhibitor LB-100, and NMDAR inhibitor MK801 were used to investigate the involved in vivo and in vitro pathways. The activation of NMDAR with L-glutamic acid (GLU) or NMDA significantly promoted cellular ferroptosis, iron content, MDA, and the PTGS2 expression, while decreasing GPX4 expression and GSH concentration in human umbilical vein endothelial cells (HUVECs), which was reversed by ferroptosis inhibitors Ferrostatin-1(Fer-1), Liproxstatin-1 (Lip-1), or Deferoxamine (DFO). RNA-seq revealed that ferroptosis and SLC7A11 participate in NMDA or GLU-mediated NMDAR activation. The PP2A-AMPK-HMGB1 pathway was majorly associated with NMDAR activation-induced ferroptosis, validated using the PP2A inhibitor LB-100, AMPK activator AICAR, or HMGB1 siRNA. The role of NMDAR in ferroptosis was validated in HUVECs induced with the ferroptosis activator errasin or RSL3 and counteracted by the NMDAR inhibitor MK-801. The in vivo results showed that NMDA- or GLU-induced ferroptosis and LOS production was reversed by MK-801, LB-100, AICAR, MK-801, and GLY, confirming that the PP2A-AMPK-HMGB1 pathway is involved in NMDAR activation-induced vascular endothelium ferroptosis. In conclusion, the present study demonstrated a novel role of NMDAR in endothelial cell injury by regulating ferroptosis via the PP2A-AMPK-HMGB1 pathway.
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Affiliation(s)
- Wei-Min Han
- Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361008, China
- Xiamen Key Laboratory of Cardiovascular Disease, Xiamen, Fujian, 361008, China
| | - Yi-Xiang Hong
- Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361008, China
- Xiamen Key Laboratory of Cardiovascular Disease, Xiamen, Fujian, 361008, China
| | - Guo-Sheng Xiao
- Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361008, China.
- Xiamen Key Laboratory of Cardiovascular Disease, Xiamen, Fujian, 361008, China.
| | - Rui-Ying Wang
- Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361008, China.
- Xiamen Key Laboratory of Cardiovascular Disease, Xiamen, Fujian, 361008, China.
| | - Gang Li
- Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, 361008, China.
- Xiamen Key Laboratory of Cardiovascular Disease, Xiamen, Fujian, 361008, China.
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Qin W, Cai XH, Han WM, Lu XZ, Chen MY, Jia ZX, Liu J, Xiao R, Qian SX. [The role and mechanism of lncRNA C9ORF139 targeting miR-24-3P/TAOK1 in regulating the proliferation of acute myeloid leukemia cells]. Zhonghua Yi Xue Za Zhi 2022; 102:576-583. [PMID: 35196780 DOI: 10.3760/cma.j.cn112137-20210703-01501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate the role and mechanism of long non-coding RNA (lncRNA) C9ORF139 targeting micro RNA(miR)-24-3P/TAOK1 in regulating the proliferation of acute myeloid leukemia (AML) cells. Methods: AML cells HL-60 and THP-1 were purchased from the Chinese Academy of Sciences and divided into 4 groups:group A was negative control group (siNC group), group B was interference C9ORF139 group (siC9ORF139 group), group C was siC9ORF139+miR-24-3p inhibitor group, and group D was miR-24-3P+TAOK1 overexpression group (oe-TAOK1 group). Real-time fluorescence quantitative reverse transcription PCR was used to detect the expression levels of AML cell lines of HL-60 and THP-1 in four groups. Cell Counting Kit-8 assay was performed to measure cell proliferation. Flow cytometry was applied to analyze cell apoptosis. Transwell test was applied to detect cell migration and invasion ability. Western blot was used to detect p-serine/threonine kinase (p-raf) and p-mitogen activation proteinkinase (p-MEK), p-extracellular regulatory protein kinase (p-ERK) expression. The luciferase reporter gene plasmid was constructed to verify the binding ability of C9ORF139,miR-24-3P and TAOK1.Nude mice were inoculated with subcutaneous tumor cells of HL-60 (group A) and HL-60 (group B). Results: After the C9ORF139 gene was knocked down and cultured for 120 h, The cell proliferation ability (0.62±0.02, 0.82±0.02), migration ability (0.22±0.03, 0.05±0.01), invasion ability (0.20±0.02, 0.13±0.03) of group B were all lower than that of group A (1.30±0.02, 1.83±0.07; 0.99±0.02, 0.99±0.02; 1.00±0.01, 1.00±0.01) (all P<0.05). When co-transfected with miR-24-3 inhibitor, cell proliferation ability, migration ability and invasion ability were all higher in group B (all P<0.05). When co-transfected with miR-24-3P and oe-TAOK1 plasmid, cell proliferation ability, migration ability and invasion ability were all higher than group B (all P<0.05).When the C9ORF139 gene in the cells was knocked down, the apoptosis level of group B (28.56±8.07, 17.74±1.91) were higher than those of group A (0.31±0.27, 2.49±0.33)(all P<0.05); when co-transfected with miR-24-3P inhibitor, the apoptosis level (2.34±0.09, 3.06±0.06) were lower than those in group B (all P<0.05); when co-transfected with miR-24-3P and oe-TAOK1 in the plasmid group, the apoptosis level (2.16±1.29, 4.80±0.37) were also lower than those of group B (all P<0.05). In HL-60 and THP-1 cells, when C9ORF139 was not mutated, the luciferase activity of miR-24-3P group was lower than that of the miR-NC group (P<0.05). When the binding site with miR-24-3p in C9ORF139 sequence was mutated, the luciferase activity in miR-24-3p group was equivalent to that in miR-NC group (P>0.05).When TAOK1 was not mutated; the luciferase activity of miR-24-3P group was lower than that of group A (P<0.05). When the binding site with miR-24-3p in TAOK1 sequence was mutated, the luciferase activity in miR-24-3p group was equivalent to that in miR-NC group (P>0.05).When the C9ORF139 gene in HL-60 cells was knocked down and cultured for 72 h, the phosphorylation expression levels of Raf, MEK and ERK molecules in group B were significantly lower than those in group A (all P<0.05). By day 14, the tumor volume in the group A was greater than the tumor cell volume in the group B [(284.49±57.61) vs (125.70±18.64) mm3, P=0.017]. The tumor weight of HL-60 in group A was heavier than that of group B [(847.80±159.36) vs (408.40±113.16) mg, P=0.001]. Conclusions: LncRNA C9ORF139 regulates TAOK1 by sponging miR-24-3P to promote the proliferation, invasion and migration of acute myeloid leukemiacell.In vivo experiments have confirmed that the expression of C9ORF139 can promote the growth of subcutaneous tumors in AML nude mice.
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Affiliation(s)
- W Qin
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - X H Cai
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - W M Han
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - X Z Lu
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - M Y Chen
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - Z X Jia
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - J Liu
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - R Xiao
- Department of Hematology, the Affiliated Changzhou 2nd People's Hospital of Nanjing Medical University, Changzhou 213000, China
| | - S X Qian
- Department of Hematology, Jiangsu Provincial People's Hospital, Nanjing 210029, China
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Cui YK, Hong YX, Wu WY, Han WM, Wu Y, Wu C, Li GR, Wang Y. Acacetin ameliorates cardiac hypertrophy by activating Sirt1/AMPK/PGC-1α pathway. Eur J Pharmacol 2022; 920:174858. [PMID: 35219729 DOI: 10.1016/j.ejphar.2022.174858] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 10/19/2021] [Revised: 02/15/2022] [Accepted: 02/22/2022] [Indexed: 12/20/2022]
Abstract
Cardiac hypertrophy is a major risk factor for developing heart failure. This study investigates the effects of the natural flavone acacetin on myocardial hypertrophy in cellular level and whole animals. In cardiomyocytes from neonatal rat with hypertrophy induced by angiotensin II (Ang II), acacetin at 0.3, 1, and 3 μM reduced the increased myocyte surface area, brain natriuretic peptide (BNP), and ROS production by upregulating anti-oxidative molecules (i.e. Nrf2, SOD1, SOD2, HO-1), anti-apoptotic protein Bcl-2, and downregulating the pro-apoptotic protein Bax and the inflammatory cytokine IL-6 in a concentration-dependent manner. In addition, acacetin rescued Ang II-induced impairment of PGC-1α, PPARα and pAMPK. These beneficial effects of acacetin were mediated by activation of Sirt1, which was confirmed in cardiac hypertrophy induced by abdominal aorta constriction (AAC) in SD rats. Acacetin prodrug (10 mg/kg, s.c., b.i.d.) treatment reduced the elevated artery blood pressure, improved the increased heart size and thickness of left ventricular wall and the ventricular fibrosis associated with inhibiting myocardial fibrosis and BNP, and reversed the impaired protective signal molecules including PGC-1α, Nrf2, PPARα, pAMPK and Sirt1 of left ventricular tissue. Our results demonstrate the novel pharmacological effect that acacetin ameliorates cardiac hypertrophy via Sirt1-mediated activation of AMPK/PGC-1α signal molecules followed by reducing oxidation, inflammation and apoptosis.
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Affiliation(s)
- Yu-Kai Cui
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Yi-Xiang Hong
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Wei-Yin Wu
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Wei-Min Han
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Yao Wu
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Chan Wu
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China
| | - Gui-Rong Li
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China; Nanjing Amazigh Pharma Limited, Nanjing, Jiangsu, 210032, China.
| | - Yan Wang
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, 361009, China.
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Wong M, Ghobrial M, Han WM, Alsousou J, Chou D, Carrothers A, Hull P, Rawal J. 613 The Floating Hip: A Distinct Injury Pattern? A Descriptive Study and Case-Control Analysis. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Aim
A “Floating Hip” injury describes a simultaneous ipsilateral fracture of the femur and pelvis. We performed a descriptive study of the injury patterns, management, and outcomes of floating hip patients, and compared these patients to those with similar pelvic fractures without femoral involvement.
Method
This was a retrospective case-series review with secondary case-control analysis. Medical records of patients presenting with a floating hip injury to our tertiary orthopaedics department between 2015 and 2020 were reviewed. The control group comprised of patients with pelvic fractures but without associated femoral fractures, matched by age, sex, pelvic fracture classification, and mechanism of injury.
Results
46 Floating Hip cases were identified (34 males), of average age 39 (15-86) years. 20 had acetabular fractures, 21 had pelvic ring fractures and 5 had both fractures, concomitant with ipsilateral femoral fractures. The most common site of femoral fracture was mid-shaft (21.7%), followed by distal (19.6%). 69.6% of P/A fractures were managed surgically, with ORIF (43%) the most common option. 4 (12.50%) patients suffered complications, including 2 infections and 1 DVT. Compared to controls, Floating Hip patients were more likely to require surgical management (67.6% vs 47.8%, p = 0.03), and had higher rates of surgical complications (12.5% vs 4.6%), though not statistically significant (p = 0.3).
Conclusions
Our study describes the patterns, management, and outcomes of Floating Hip injuries, and observes differences in the management and complications compared to similar pelvic fractures without femoral involvement. These findings suggest Floating Hip cases may warrant consideration as a distinct injury pattern.
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Affiliation(s)
- M Wong
- School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - M Ghobrial
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - W M Han
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - J Alsousou
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - D Chou
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - A Carrothers
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - P Hull
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - J Rawal
- Department of Trauma and Orthopaedic Surgery, Addenbrooke’s Hospital, Cambridge, United Kingdom
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Han WM, Chen XC, Li GR, Wang Y. Acacetin Protects Against High Glucose-Induced Endothelial Cells Injury by Preserving Mitochondrial Function via Activating Sirt1/Sirt3/AMPK Signals. Front Pharmacol 2020; 11:607796. [PMID: 33519472 PMCID: PMC7844858 DOI: 10.3389/fphar.2020.607796] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 11/25/2020] [Indexed: 12/16/2022] Open
Abstract
The strategy of decreasing atherosclerotic cardiovascular disorder is imperative for reducing premature death and improving quality of life in patients with diabetes mellitus. The aim of this study was to investigate whether the natural flavone acacetin could protect against endothelial injury induced by high glucose and attenuate diabetes-accelerated atherosclerosis in streptozotocin-(STZ) induced diabetic ApoE−/− mice model. It was found that in human umbilical vein endothelial cells (HUVECs) cultured with normal 5.5 mM or high 33 mM glucose, acacetin (0.3–3 μM) exerted strong cytoprotective effects by reversing high glucose-induced viability reduction and reducing apoptosis and excess production of intracellular reactive oxygen species (ROS) and malondialdehyde in a concentration-dependent manner. Acacetin countered high glucose-induced depolarization of mitochondrial membrane potential and reduction of ATP product and mitoBcl-2/mitoBax ratio. Silencing Sirt3 abolished the beneficial effects of acacetin. Further analysis revealed that these effects of acacetin rely on Sirt1 activation by increasing NAD+ followed by increasing Sirt3, pAMPK and PGC-1α. In STZ-diabetic mice, acacetin significantly upregulated the decreased signaling molecules (i.e. SOD, Bcl-2, PGC-1α, pAMPK, Sirt3 and Sirt1) in aorta tissue and attenuated atherosclerosis. These results indicate that vascular endothelial protection of acacetin by activating Sirt1/Sirt3/AMPK signals is likely involved in alleviating diabetes-accelerated atherosclerosis by preserving mitochondrial function, which suggests that acacetin may be a drug candidate for treating cardiovascular disorder in patients with diabetes.
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Affiliation(s)
- Wei-Min Han
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Xu-Chang Chen
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Gui-Rong Li
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, China.,Nanjing Amazigh Pharma Limited, Nanjing, China
| | - Yan Wang
- Xiamen Cardiovascular Hospital, School of Medicine, Xiamen University, Xiamen, China
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Han WM, Jiamsakul A, Jantarapakde J, Yunihastuti E, Choi JY, Ditangco R, Chaiwarith R, Sun LP, Khusuwan S, Merati TP, Do CD, Azwa I, Lee MP, Van Nguyen K, Chan YJ, Kiertiburanakul S, Ng OT, Tanuma J, Pujari S, Zhang F, Gani YM, Sangle S, Ross J, Kumarasamy N. Association of body mass index with immune recovery, virological failure and cardiovascular disease risk among people living with HIV. HIV Med 2020; 22:294-306. [PMID: 33200864 DOI: 10.1111/hiv.13017] [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: 08/03/2020] [Revised: 10/13/2020] [Accepted: 10/21/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES We conducted a longitudinal cohort analysis to evaluate the association of pre-treatment body mass index (BMI) with CD4 recovery, virological failure (VF) and cardiovascular risk disease (CVD) markers among people living with HIV (PLHIV). METHODS Participants who were enrolled between January 2003 and March 2019 in a regional Asia HIV cohort with weight and height measurements prior to antiretroviral therapy (ART) initiation were included. Factors associated with mean CD4 increase were analysed using repeated-measures linear regression. Time to first VF after 6 months on ART and time to first development of CVD risk markers were analysed using Cox regression models. Sensitivity analyses were done adjusting for Asian BMI thresholds. RESULTS Of 4993 PLHIV (66% male), 62% had pre-treatment BMI in the normal range (18.5-25.0 kg/m2 ), while 26%, 10% and 2% were underweight (< 18.5 kg/m2 ), overweight (25-30 kg/m2) and obese (> 30 kg/m2 ), respectively. Both higher baseline and time-updated BMI were associated with larger CD4 gains compared with normal BMI. After adjusting for Asian BMI thresholds, higher baseline BMIs of 23-27.5 and > 27.5 kg/m2 were associated with larger CD4 increases of 15.6 cells/µL [95% confidence interval (CI): 2.9-28.3] and 28.8 cells/µL (95% CI: 6.6-50.9), respectively, compared with normal BMI (18.5-23 kg/m2 ). PLHIV with BMIs of 25-30 and > 30 kg/m2 were 1.27 times (95% CI: 1.10-1.47) and 1.61 times (95% CI: 1.13-2.24) more likely to develop CVD risk factors. No relationship between pre-treatment BMI and VF was observed. CONCLUSIONS High pre-treatment BMI was associated with better immune reconstitution and CVD risk factor development in an Asian PLHIV cohort.
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Affiliation(s)
- W M Han
- The Kirby Institute, UNSW, Sydney, NSW, Australia.,HIV-NAT, Thai Red Cross AIDS Research Centre, Bangkok, Thailand
| | - A Jiamsakul
- The Kirby Institute, UNSW, Sydney, NSW, Australia
| | - J Jantarapakde
- HIV-NAT, Thai Red Cross AIDS Research Centre, Bangkok, Thailand
| | - E Yunihastuti
- Faculty of Medicine, Universitas Indonesia - Dr Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - J Y Choi
- Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - R Ditangco
- Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - R Chaiwarith
- Research Institute for Health Sciences, Chiang Mai, Thailand
| | - L P Sun
- National Center for HIV/AIDS, Dermatology & STDs, Phnom Penh, Cambodia
| | - S Khusuwan
- Chiangrai Prachanukroh Hospital, Chiang Rai, Thailand
| | - T P Merati
- Faculty of Medicine, Udayana University & Sanglah Hospital, Bali, Indonesia
| | - C D Do
- Bach Mai Hospital, Hanoi, Vietnam
| | - I Azwa
- University Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - M-P Lee
- Queen Elizabeth Hospital, Hong Kong SAR, India
| | - K Van Nguyen
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - Y-J Chan
- Taipei Veterans General Hospital, Taipei, Taiwan
| | - S Kiertiburanakul
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - O T Ng
- Tan Tock Seng Hospital, Singapore, Singapore
| | - J Tanuma
- National Center for Global Health and Medicine, Tokyo, Japan
| | - S Pujari
- Institute of Infectious Diseases, Pune, India
| | - F Zhang
- Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Y M Gani
- Hospital Sungai Buloh, Sungai Buloh, Malaysia
| | - S Sangle
- BJ Government Medical College and Sassoon General Hospital, Pune, India
| | - J Ross
- TREAT Asia, amfAR - The Foundation for AIDS Research, Bangkok, Thailand
| | - N Kumarasamy
- Chennai Antiviral Research and Treatment Clinical Research Site (CART CRS), VHS-Infectious Diseases Medical Centre, VHS, Chennai, India
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Zhao Y, Wang Y, Zhu MS, Han WM, Li Z, Hong SF, Yin P, Zhuang GH, Qi ZQ. Expression Pattern of Tumor Necrosis Factor-α-Induced Protein 8-Like 2 in Acute Rejection of Cardiac Allograft. Transplant Proc 2018; 50:293-298. [PMID: 29407324 DOI: 10.1016/j.transproceed.2017.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 11/03/2017] [Indexed: 01/13/2023]
Abstract
BACKGROUND Tumor necrosis factor-α-induced protein-8 like-2 (TIPE2) is a negative regulator of innate immunity and cellular immunity, yet the expression pattern of TIPE2 in acute rejection of cardiac allograft remain enigmatic. METHODS We developed cardiac transplantation models and divided into 3 groups: a naive group, a syngeneic group, and an allogeneic group. Then, we detected the messenger RNA and protein of TIPE2 in cardiac allografts. Real-time polymerase chain reaction showed expression of CD4 and CD8 in the donor heart, and immunofluorescence assay revealed the association between T cells and TIPE2. RESULTS In our study, we first found that the expression of TIPE2 in cardiac allografts is upregulated compared with the syngeneic control, and increases in a time-dependent manner. The immunocytochemistry of heart grafts revealed a strong expression of TIPE2 in the inflammatory cells, but not in the cardiomyocytes. Finally, we proved that CD4+ and CD8+ T cells infiltrated cardiac allografts abundantly, which express ample TIPE2. CONCLUSIONS The upregulated expression of TIPE2 in cardiac allografts, mainly came from T cells, which infiltrated the donor heart. This finding indicates that there may be an association between TIPE2 and acute cardiac allograft rejection.
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Affiliation(s)
- Y Zhao
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China; Department of Hepatobiliary Surgery, Zhongshan Hospital Xiamen University, Research Institute of Digestive Disease, Xiamen, Fujian, China
| | - Y Wang
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China; Department of Sports Medicine & Joint Surgery, Zhongshan Hospital, Xiamen University, Fujian, China
| | - M S Zhu
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China
| | - W M Han
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China
| | - Z Li
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China
| | - S F Hong
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China
| | - P Yin
- Department of Pathology, Zhongshan Hospital, Xiamen University, Xiamen City, Fujian Province, China
| | - G H Zhuang
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China.
| | - Z Q Qi
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, China.
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Lee BW, Aw M, Chiang WC, Daniel M, George GM, Goh ENA, Han WM, Lee MLLJ, Leong KP, Liew WK, Phuah KY, Shek L, Van Bever H. Academy of Medicine, Singapore-Ministry of Health Clinical Practice Guidelines: Management of Food Allergy. Singapore Med J 2013. [DOI: 10.11622/smedj.2013156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Lee BW, Aw MM, Chiang WC, Daniel M, George GM, Goh EN, Han WM, Lee ML, Leong KP, Liew WK, Phuah KY, Shek LP, Van Bever H. Academy of medicine, Singapore-Ministry of Health clinical practice guidelines: management of food allergy. Singapore Med J 2010; 51:599-607. [PMID: 20730402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The Academy of Medicine, Singapore (AMS) and the Ministry of Health (MOH) publish clinical practice guidelines to provide doctors and patients in Singapore with evidence-based guidance on managing important medical conditions. This article reproduces the introduction and executive summary (with recommendations from the guidelines) from the AMS-MOH clinical practice guidelines on the Management of Food Allergy, for the information of readers of the Singapore Medical Journal. Chapters and page numbers mentioned in the reproduced extract refer to the full text of the guidelines, which are available from the Academy of Medicine website: http://www.ams.edu.sg/guidelines.asp#foodallergy. The recommendations should be used with reference to the full text of the guidelines. Following this article are multiple choice questions based on the full text of the guidelines.
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Affiliation(s)
- B W Lee
- Academy of Medicine, Singapore-Ministry of Health Clinical Practice Guidelines Workgroup on Management of Food Allergy.
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Gu RM, Sun MZ, Li YR, Zhang JY, Han WM, Liu G. [Effect of microinjection of GABA into the caudate nucleus on electrical discharges of nociceptive neurons in caudate nucleus of rat]. Sheng Li Xue Bao 1997; 49:321-6. [PMID: 9812818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The characteristics of glass microelectrode recorded electrical activity of nociceptive neurons in the caudate nucleus elicited by microinjection of GABA and blockage by picrotoxin (PIC) were studied in 53 Wistar rats. The results showed that GABA (25, 50, 100 micrograms/2 microliters every 2 min) inhibited the activity of pain excitation neurons (PEN), as shown by decreased frequency and increased latency, but enhanced the activity of pian, inhibition neurons (PIN), as shown by shortened duration and increased discharge frequency. Both activities are highly dose-dependent and could be blocked by PIC (i.p. 250 micrograms, 1 ml/1 min).
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Affiliation(s)
- R M Gu
- Department of Physiology, Harbin Medical University
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Han WM. [Transthoracic resection of esophagus, gastric fundus and spleen for portal hypertension (author's transl)]. Zhonghua Wai Ke Za Zhi 1980; 18:73-4. [PMID: 7215059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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