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Quan JH, Gao FF, Ma TZ, Ye W, Gao X, Deng MZ, Yin LL, Choi IW, Yuk JM, Cha GH, Lee YH, Chu JQ. Toxoplasma gondii Induces Pyroptosis in Human Placental Trophoblast and Amniotic Cells by Inducing ROS Production and Activation of Cathepsin B and NLRP1/NLRP3/NLRC4/AIM2 Inflammasome. Am J Pathol 2023; 193:2047-2065. [PMID: 37741453 DOI: 10.1016/j.ajpath.2023.08.016] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 08/18/2023] [Accepted: 08/29/2023] [Indexed: 09/25/2023]
Abstract
Toxoplasma gondii infection in pregnant women may cause fetal anomalies; however, the underlying mechanisms remain unclear. The current study investigated whether T. gondii induces pyroptosis in human placental cells and the underlying mechanisms. Human placental trophoblast (BeWo and HTR-8/SVneo) and amniotic (WISH) cells were infected with T. gondii, and then reactive oxygen species (ROS) production, cathepsin B (CatB) release, inflammasome activation, and pyroptosis induction were evaluated. The molecular mechanisms of these effects were investigated by treating the cells with ROS scavengers, a CatB inhibitor, or inflammasome-specific siRNA. T. gondii infection induced ROS generation and CatB release into the cytosol in placental cells but decreased mitochondrial membrane potential. T. gondii-infected human placental cells and villi exhibited NLRP1, NLRP3, NLRC4, and AIM2 inflammasome activation and subsequent pyroptosis induction, as evidenced by increased expression of ASC, cleaved caspase-1, and mature IL-1β and gasdermin D cleavage. In addition to inflammasome activation and pyroptosis induction, adverse pregnancy outcome was shown in a T. gondii-infected pregnant mouse model. Administration of ROS scavengers, CatB inhibitor, or inflammasome-specific siRNA into T. gondii-infected cells reversed these effects. Collectively, these findings show that T. gondii induces NLRP1/NLRP3/NLRC4/AIM2 inflammasome-dependent caspase-1-mediated pyroptosis via induction of ROS production and CatB activation in placental cells. This mechanism may play an important role in inducing cell injury in congenital toxoplasmosis.
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Affiliation(s)
- Juan-Hua Quan
- Department of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Fei Fei Gao
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Tian-Zhong Ma
- Reproductive Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Wei Ye
- Department of Obstetrics and Gynecology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Xiang Gao
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Ming-Zhu Deng
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Lan-Lan Yin
- Reproductive Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China
| | - In-Wook Choi
- Department of Infection Biology and Department of Medical Science, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Jae-Min Yuk
- Department of Infection Biology and Department of Medical Science, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Guang-Ho Cha
- Department of Infection Biology and Department of Medical Science, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Young-Ha Lee
- Department of Infection Biology and Department of Medical Science, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
| | - Jia-Qi Chu
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, People's Republic of China.
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Zhang PF, Liu PZ, Wang CL, Deng MZ, Lin YR, Ren XL, Chen XL. Effects of elevated atmospheric ammonia concentration on photosynthetic characteristics and grain yield in wheat under different nitrogen rates. Ying Yong Sheng Tai Xue Bao 2023; 34:1009-1014. [PMID: 37078320 DOI: 10.13287/j.1001-9332.202304.017] [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] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
To evaluate the effects of nitrogen (N) application rates on the growth, photosynthetic traits and yield of winter wheat under elevated atmospheric ammonia (NH3) concentrations could provide guidance for N management under high NH3 environment. We conducted a split-plot experiment for two consecutive years (2020-2021 and 2021-2022) with top-open chambers. The treatments included two NH3 concentrations [elevated ambient NH3 concentration at 0.30-0.60 mg·m-3 (EAM) and air NH3 concentration at 0.01-0.03 mg·m-3 (AM)] and two N application rates [recommended N dose (+N) and no N application (-N)]. We analyzed the effects of aforementioned treatments on net photosynthetic rate (Pn), stomatal conductance (gs), chlorophyll content (SPAD value), plant height, and grain yield. The results showed that averaged across the two years, EAM significantly increased Pn, gs, and SPAD values at the jointing and booting stages at the -N level by 24.6%, 16.3%, 21.9% and 20.9%, 37.1%, 5.7%, respectively, compared with AM. However, EAM significantly decreased Pn, gs, and SPAD values at jointing and booting stages at +N level by 10.8%, 5.9%, 3.6% and 6.8%, 18.9%, 9.3%, respectively, over AM treatment. There was a significant effect of NH3 treatment, N application rates and their interaction on plant height and grain yield. Compared with AM, EAM increased the average plant height and grain yield by 4.5% and 32.1% at -N level and decreased by 1.1% and 8.5% at +N level, respectively. In a nutshell, the eleva-ted ambient NH3 concentration had positive effect on photosynthetic characteristics, plant height, and grain yield under ambient N condition, but a inhibitory effect under N application.
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Affiliation(s)
- Peng-Fei Zhang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
| | - Peng-Zhao Liu
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
| | - Cheng-Long Wang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Ming-Zhu Deng
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
| | - Yan-Rong Lin
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
| | - Xiao-Long Ren
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
| | - Xiao-Li Chen
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China
- Ministry of Agriculture Key Laboratory of Crop Phyic-ecology and Tillage in Northwestern Loess Plateau, Yangling 712100, Shaanxi, China
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Yang Y, Luo YY, Wu S, Tang YD, Rao XD, Xiong L, Tan M, Deng MZ, Liu H. Association between C677T and A1298C polymorphisms of the MTHFR gene and risk of male infertility: a meta-analysis. Genet Mol Res 2016; 15:gmr7631. [PMID: 27173242 DOI: 10.4238/gmr.15027631] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Published studies on the association between the C677T and A1298C polymorphisms of the methylenetetrahydrofolate reductase (MTHFR) gene and male infertility risk are controversial. To obtain a more precise evaluation, we performed a meta-analysis based on published case-control studies. We conducted an electronic search of PubMed, EMBASE, the Cochrane Library, the Web of Science, and the China Knowledge Resource Integrated Database for papers on MTHFR gene C677T and A1298C polymorphisms and male infertility risk. Pooled odds ratios (ORs) with 95% confidence intervals (95%CIs) were used to assess the strength of association in homozygote, heterozygote, dominant, recessive, and additive models. Statistical heterogeneity, test of publication bias, and sensitivity analysis were carried out using the STATA software (Version 13.0). Overall, 21 studies of C677T (4505 cases and 4024 controls) and 13 studies of A1298C (2785 cases and 3094 controls) were included in this meta-analysis. For C677T, the homozygote comparison results were OR = 1.629, 95%CI (1.215- 2.184), and the recessive model results were OR = 1.462 (1.155- 1.850). For A1298C, the homozygote comparison results were OR = 1.289 (1.029-1.616), and the recessive model results were OR = 1.288 (1.034-1.604). In conclusion, the current meta-analysis showed that the MTHFR C677T polymorphism was associated with a significantly increased male infertility risk in the Asian and overall populations, but not in the Caucasian population, and there was a significant association between the A1298C polymorphism and male infertility risk in the Asian, Caucasian, and overall groups.
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Affiliation(s)
- Y Yang
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - Y Y Luo
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - S Wu
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - Y D Tang
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - X D Rao
- Department of General Surgery, The Forth Affiliated Hospital of Nanchang University, Jiangxi Medical School of Nanchang University, Nanchang, China
| | - L Xiong
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - M Tan
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - M Z Deng
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - H Liu
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
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Yang Y, Yang LJ, Deng MZ, Luo YY, Wu S, Xiong L, Wang D, Liu Y, Liu H. MTHFR C677T and A1298C polymorphisms and risk of lung cancer: a comprehensive evaluation. Genet Mol Res 2016; 15:gmr7615. [PMID: 27173216 DOI: 10.4238/gmr.15027615] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Results from previous studies on the association between methylenetetrahydrofolate reductase (MTHFR) polymorphisms C677T and A1298C and lung cancer have been conflicting. The aim of this meta-analysis was to clarify the effect of MTHFR polymorphisms on the risk of lung cancer. An electronic search of PubMed, EMBASE, the Cochrane library, and the China Knowledge Resource Integrated Database for papers on C677T and A1298C and susceptibility to lung cancer was performed. The STATA software (Version 13.0) was used for statistical analysis. Statistical heterogeneity, tests of publication bias, and a sensitivity analysis were performed. Twenty-six studies on C677T (12,324 cases and 12,532 controls) and thirteen studies on A1298C (6773 cases and 8207 controls) were included in the meta-analysis. The MTHFR C677T polymorphism showed significant pooled ORs for the homozygote comparison (TT versus CC: OR = 1.518, 95%CI = 1.220-1.890), heterozygote comparison (CT versus CC: OR = 1.053, 95%CI = 0.940-1.179), dominant model (CT + TT versus CC: OR = 1.143, 95%CI = 1.013-1.291), recessive model (TT versus CT + CC: OR = 1.435, 95%CI = 1.190-1.730), and additive model (T versus C: OR = 1.176, 95%CI = 1.066-1.298). In summary, our meta-analysis showed that the MTHFR C677T polymorphism is associated with a significant increase in lung cancer risk in Asian and overall populations, but not in Caucasian populations. However, no significant association between the MTHFR A1298C polymorphism and lung cancer risk was found in either the Caucasian or Asian group with any genetic models.
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Affiliation(s)
- Y Yang
- West China Hospital, Sichuan University, Chengdu, China
| | - L J Yang
- Department of Respiration, East Branch, Sichuan Provincial People's Hospital, Sichuan Academy of Medical Science, Chengdu, China
| | - M Z Deng
- West China Hospital, Sichuan University, Chengdu, China
| | - Y Y Luo
- West China Hospital, Sichuan University, Chengdu, China
| | - S Wu
- West China Hospital, Sichuan University, Chengdu, China
| | - L Xiong
- West China Hospital, Sichuan University, Chengdu, China
| | - D Wang
- West China Hospital, Sichuan University, Chengdu, China
| | - Y Liu
- West China Hospital, Sichuan University, Chengdu, China
| | - H Liu
- West China Hospital, Sichuan University, Chengdu, China
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Chen H, Deng MZ. A novel stereocontrolled synthesis of 1,2-trans cyclopropyl ketones via suzuki-type coupling of acid chlorides with cyclopropylboronic acids. Org Lett 2000; 2:1649-51. [PMID: 10880192 DOI: 10.1021/ol000013h] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The palladium-catalyzed cross-coupling reaction of cyclopropylboronic acids with acyl chlorides was achieved by the combination of Ag(2)O and K(2)CO(3) as the base. Highly enantiomerically enriched cyclopropyl ketones (ee >90%) were also obtained by the reaction of corresponding chiral cyclopropylboronic acids.
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Affiliation(s)
- H Chen
- Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Academia Sinica, China
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Abstract
In a prospective study of an estimated 9,792 inpatients treated with neuroleptic medication at a large Chinese psychiatric hospital, 12 patients developed neuroleptic malignant syndrome. The estimated prevalence of neuroleptic malignant syndrome in these psychiatric inpatients was 1.23/1,000 (95% confidence interval = 0.63/1,000 to 2.14/1,000). Unlike other investigators, the authors found that young adulthood, nonschizophrenic illness, oral high-potency neuroleptics, and concurrent use of lithium were not important risk factors for neuroleptic malignant syndrome. However, depot fluphenazine decanoate, particularly if used without an antiparkinsonian agent, was a risk factor.
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Affiliation(s)
- M Z Deng
- Guangzhou City Psychiatric Hospital, Guangdong, People's Republic of China
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