1
|
Wang XH, Liu XQ, Cai DC, Hu P, Li H. [Hepatic pathological characteristics and factors influencing alanine transaminase value below twice the upper limit of normal in patients with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:483-488. [PMID: 37365024 DOI: 10.3760/cma.j.cn501113-20230217-00062] [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] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Objective: To analyze the hepatic pathological characteristics and factors influencing an alanine transaminase value below twice the upper limit of normal in patients with chronic hepatitis B (CHB) and further explore the optimal ALT threshold strategy for initiating antiviral therapy. Methods: Clinical data of treatment-naïve CHB patients who underwent liver biopsies from January 2010 to December 2019 were retrospectively collected. Multiple regression models were used to explore the ALT levels and significant risk of hepatic histological changes (≥G2/S2). Receiver operating characteristic curve was used to evaluate the value of different models in diagnosing liver tissue inflammation≥G2 or fibrosis ≥ S2. Results: A total of 447 eligible CHB patients, with a median age of 38.0 years and 72.9% males, were included. During ALT normalization, there was significant liver inflammation (≥G2) and fibrosis (≥S2) in 66.9% and 53.0% of patients, respectively. With an ALT rise of 1-2×ULN, the proportions of liver inflammation≥G2 and fibrosis≥S2 were 81.2% and 60.0%, respectively. After adjusting for confounding factors, higher ALT levels (> 29 U/L) were found to be associated with significant liver inflammation (OR: 2.30, 95% CI: 1.11 ~ 4.77) and fibrosis (OR: 1.84, 95% CI: 1.10 ~ 3.09). After the measurement of glutamyltransferase-platelet ratio (GPR), the proportion of CHB patients with≥G2/S2 was significantly reduced under different treatment thresholds of ALT standards, and in particular, the erroneous evaluation of liver fibrosis≥S2 was significantly improved (33.5% to 57.5%). Conclusion: More than half of CHB patients have a normal ALT or one within 2 × ULN, regardless of whether or not there is apparent inflammation and fibrosis. GPR can significantly improve the precise assessment of different conditions of treatment thresholds for the ALT value in CHB patients.
Collapse
Affiliation(s)
- X H Wang
- Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Department of Infectious Disease, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - X Q Liu
- Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Department of Infectious Disease, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - D C Cai
- Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Department of Infectious Disease, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - P Hu
- Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Department of Infectious Disease, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - H Li
- Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Department of Infectious Disease, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| |
Collapse
|
2
|
Hu YQ, Wang N, Ran XP, Cai DC. [Real-world study evaluating the incidence of liver damage conditions in patients with primary liver cancer using immune checkpoint inhibitor-based combination therapy]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:57-62. [PMID: 35152670 DOI: 10.3760/cma.j.cn501113-20210910-00466] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To evaluate the incidence of immune checkpoint inhibitor-based combination therapy-induced liver damage in patients with primary liver cancer. Methods: Clinical data of 65 hospitalized cases of primary liver cancer treated with programmed cell death-1 its ligand programmed death-ligand 1 (PD-1/PD-L1) antibody in the Department of Infectious Diseases of the Second Affiliated Hospital of Chongqing Medical University from January 1, 2018 to March 31, 2021 were retrospectively analyzed. The degree of liver injury before and after treatment was assessed according to CTCAE v5.0. Patients were grouped according to gender, age, presence or absence of cirrhosis, baseline Child-Pugh score, BCLC stage, and treatment regimen to compare the incidence of liver injury under different conditions. The χ (2) test or rank-sum test was used for comparison among multiple groups. Results: 46 cases (70.77%) had liver damage of any grade according to the CTCAE V5.0 criteria during the treatment and observation period. All 6 cases who received standardized anti-hepatitis B virus (HBV) treatment developed liver damage. 10 (15.38%), 15 (23.08%), 19 (29.23%), and 2 (3.08%) cases had grade 1, 2, 3, and 4 liver damage respectively. There was no statistically significant difference in the incidence of liver damage between male and female patients (68.33% and 100%, P = 0.180). There was no statistically significant difference in the incidence of liver damage among different age groups (P = 0.245). The incidence of liver damage in cirrhotic and non-cirrhotic group was 72.22%, and 63.64% (P = 0.370), respectively. The incidence of liver damage in patients with baseline Child-Pugh class A, B, and C were 71.43%, 61.11% and 100%, respectively, and the difference was not statistically significant (P = 0.878). The incidence of liver damage was not statistically significantly different under different BCLC stages (P = 1.000). The incidence of liver damage in the PD-1/PD-L1 antibody monotherapy, PD-1/PD-L1 antibody combined with targeted drug therapy, and PD-1/PD-L1 antibody combined with TACE/radiofrequency ablation treatment group were 60.00%, 67.85%, and 86.67%, respectively. There was no statistically significant difference in the incidence of liver damage between the treatment regimen (P = 0.480). Conclusion: Immune checkpoint inhibitor therapy-induced liver damage is common in patients with primary liver cancer; however, it rarely severely endangers the patient's life. Additionally, patient's gender, age, presence or absence of cirrhosis, baseline liver function, BCLC stage and the immunotherapy regimen has no effect on the incidence of immune-related liver damage.
Collapse
Affiliation(s)
- Y Q Hu
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - N Wang
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - X P Ran
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - D C Cai
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| |
Collapse
|
3
|
Shi YJ, Ding Y, Ao L, Zhang DZ, Cai DC. [Very low-level viremia: new clinical attention-requiring problem during the course of anti-hepatitis B virus treatment]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:1147-1150. [PMID: 35045628 DOI: 10.3760/cma.j.cn501113-20210830-00442] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Clinical studies have validated low-level viremia is associated with a variety of adverse outcomes in patients with chronic hepatitis B during the course of receiving nucleos(t)ide analogue antiviral therapy. With the advancement of PCR technology, the high sensitivity PCR detection of HBV DNA can reach the lower limit of detection of < 5-10 IU/mL. The standard criterion for judging among patients who have achieved complete virological response is HBV DNA levels < 20 IU/ml. The use of highly sensitive PCR tests can detect very low-level viremia (HBV DNA < 20 IU/ml, but > 5-10 IU/mL) in some patients. However, there are currently fewer relevant studies, and more research data needs to be accumulated to answer this clinical question of whether long-term very low-level viremia affects the clinical outcome of patients with chronic hepatitis B.
Collapse
Affiliation(s)
- Y J Shi
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - Y Ding
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - L Ao
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - D Z Zhang
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - D C Cai
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| |
Collapse
|
4
|
Wang XH, Li SY, Dan XL, Cai DC. [A case of alcoholic liver failure combined with leukemoid reaction]. Zhonghua Gan Zang Bing Za Zhi 2020; 28:882-884. [PMID: 33105935 DOI: 10.3760/cma.j.cn501113-20200717-00394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- X H Wang
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - S Y Li
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - X L Dan
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - D C Cai
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| |
Collapse
|
5
|
Wang N, Liu QE, Ren H, Cai DC. [Situational analysis of clinical application of diagnostic scoring system for autoimmune hepatitis]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:708-711. [PMID: 31594097 DOI: 10.3760/cma.j.issn.1007-3418.2019.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- N Wang
- Department of Infectious Disease, the Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | | | | | | |
Collapse
|
6
|
Guo HJ, Gao YF, Liu HY, He HT, Huang MT, Cai DC, Liao DD, Li JN, Yin XR, Liu ZH, Hu J. [Impact of cessation of antiviral therapy at delivery on postpartum liver function in mothers with chronic hepatitis B virus infection]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:112-117. [PMID: 30818915 DOI: 10.3760/cma.j.issn.1007-3418.2019.02.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the impact of immediate cessation of antiviral therapy on postpartum liver function and the factors influencing postpartum abnormality in mothers with chronic hepatitis B virus infection. Methods: A retrospective cohort study was conducted. One hundred eighty-eight pregnant women with HBV DNA level > 2×106 IU/ml were enrolled from June 2014 to June 2018. Demographic information and clinical data of liver function and HBV DNA load during gravidity, intrapartum and postpartum period were collected. According to the antiviral treatment recommendations during pregnancy, the women were divided into three groups, namely, tenofovir (TDF), telbivudine (LdT) and control group. Liver function abnormalities among the three groups were compared within 6 months after delivery, and the factors influencing abnormal liver function were analyzed by unconditional logistic regression. Results: Of the 188 cases, 72 cases were in the TDF group, 80 cases in the LdT group, and 36 cases in the control group. Pregnant women in the TDF and LdT groups received oral TDF (300 mg/d) and LdT (600 mg/d) from 28 ± 4 weeks of gestation till delivery. Among the 188 patients, 30 (16.0%) had abnormal postpartum liver function abnormality. The incidence of postpartum liver function abnormality [alanine aminotransferase (ALT) > 2 × upper limit of normal (ULN)] in the TDF, LdT, and control groups was 19.4%, 12.5%, and 16.7%, respectively. The postpartum peak levels of ALT (median, range) in the three groups were 34.5 (12.0-946.0) U/L, 37.5 (12.0-733.8) U/L, and 39.0 (7.0-513.0) U/L, respectively. There was no significant difference between the two indexes among the three groups (P > 0.05). There was no statistically significant difference in the degree of postpartum liver function abnormalities between the three groups (P = 0.944). Most of the liver function abnormalities were mild to moderate (2 × ULN≤ALT < 10 × ULN), and usually resolved spontaneously or by treatment. Univariate and multivariate analysis showed that baseline ALT level during pregnancy was an independent factor associated with postpartum liver function abnormality (OR = 1.031, CI 95%: 1.005-1.058; χ(2) = 5.340, P = 0.021), whereas age, antiviral therapy, HBeAg-positivity, baseline HBV DNA levels, gravidity, parity, preterm delivery and delivery mode were not significantly associated with postpartum liver function abnormality. Conclusion: Cessation of antiviral therapy after delivery did not significantly increase the risk of postpartum liver function abnormality in pregnant women with chronic HBV infection. The ALT level during pregnancy is a factor influencing postpartum liver function abnormality.
Collapse
Affiliation(s)
- H J Guo
- Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Y F Gao
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - H Y Liu
- Department of Severe Liver Disease, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - H T He
- Institute of Hepatology and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - M T Huang
- Institute of Hepatology and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - D C Cai
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - D D Liao
- Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J N Li
- Institute of Hepatology and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X R Yin
- Institute of Hepatology and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Z H Liu
- Institute of Hepatology and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Hu
- Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou 510515, China; Department of Hospital Infection Management, Zhujiang Hospital, Southern Medical University, Guangzhou 510220, China
| |
Collapse
|
7
|
Cai DC, Pan C, Yu WH, Dang SS, Li J, Wu SM, Jiang N, Wang MR, Zhang ZH, Lin F, Xin SJ, Yang YF, Shen BS, Ren H. [Clinical effect and safety of 144-week treatment with entecavir capsules in treatment-naïve HBeAg-positive patients with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2019; 25:597-600. [PMID: 29056009 DOI: 10.3760/cma.j.issn.1007-3418.2017.08.008] [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: 11/05/2022]
Abstract
Objective: To investigate the clinical effect and safety of entecavir capsules in the treatment of treatment-naïve HBeAg-positive patients with chronic hepatitis B (CHB). Methods: A total of 158 HBeAg-positive CHB patients were given oral entecavir capsules at a dose of 0.5 mg/time once a day for 144 weeks. Clinical outcome and safety were evaluated at baseline and at 24, 48, 72, 96, 120, and 144 weeks of treatment respectively. The Fisher's exact test was used for the analysis of categorical data. Results: After 144 weeks of treatment, 90.91% of all patients achieved virologic response (< 69 IU/ml), the normalization rate of alanine aminotransferase was 88.18%, the clearance rate of HBeAg was 33.33%, and the seroconversion rate of HBeAg was 24.07%. Of all patients, 2 dropped out due to adverse events and 5 experienced serious adverse reactions. Conclusion: Entecavir capsules can inhibit viral replication and have good safety in treatment-naïve HBeAg-positive CHB patients.
Collapse
Affiliation(s)
- D C Cai
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - C Pan
- Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350000, China
| | - W H Yu
- The Eighth People's Hospital of Guangzhou, Guangzhou 510060, China
| | - S S Dang
- The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - J Li
- The Second People's Hospital of Tianjin, Tianjin 300192, China
| | - S M Wu
- Shanghai Public Health Clinical Center, Shanghai 201508, China
| | - N Jiang
- Sichuan Provincial People's Hospital, Chengdu 610772, China
| | - M R Wang
- No.81 Hospital of PLA, Nanjing 210002, China
| | - Z H Zhang
- Jinan Infectious Disease Hospital, Jinan 250021, China
| | - F Lin
- Hainan General Hospital, Haikou 570311, China
| | - S J Xin
- No.302 Hospital of PLA, Beijing 100039, China
| | - Y F Yang
- The Second Hospital of Nanjing, Nanjing 210003, China
| | - B S Shen
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453100, China
| | - H Ren
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| |
Collapse
|
8
|
Cai DC, Ren H. [China's hepatitis B burden and expectation on 40 years of trials and tribulations]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:3-5. [PMID: 30685915 DOI: 10.3760/cma.j.issn.1007-3418.2019.01.002] [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: 11/05/2022]
Abstract
Since the 40th anniversary of China's reform and opening-up, earth-shattering development has taken place in all walks of life across the country. Research field on the prevention and treatment of chronic hepatitis B has been rewarding after 40 years of trials and tribulations. Additionally, hepatitis B vaccination program and effective antiviral therapy has amazingly reduced the prevalence of hepatitis B virus infection. Coupled with the literary evidence, a consensus has gradually emerged in the field of anti-HBV treatment that "high potency, low incidence of drug resistance and immunomodulation coexists". We believe that in the near future, according to the principle of "prevention first, prevention with treatment", universal vaccination program for infants, vaccination of high-risk groups, active treatment of HBV carriers and chronic hepatitis B patients, and the realization of "early screening, diagnosis and treatment" of hepatocellular carcinoma will eradicate HBV infection.
Collapse
Affiliation(s)
- D C Cai
- Department of Infectious Diseases, Institute for Viral Hepatitis, the Key Laboratory of Molecular Biology for Infectious Disease, Chinese Ministry of Education, the Second Affliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | | |
Collapse
|
9
|
Kim HC, Bellis GA, Kim MS, Klein TA, Gopurenko D, Cai DC, Seo HJ, Cho IS, Park JY. Species Diversity and Seasonal Distribution of Culicoides spp. (Diptera: Ceratopogonidae) in Jeju-do, Republic of Korea. Korean J Parasitol 2015; 53:501-6. [PMID: 26323852 PMCID: PMC4566504 DOI: 10.3347/kjp.2015.53.4.501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 09/30/2010] [Accepted: 10/03/2010] [Indexed: 11/23/2022]
Abstract
Biting midges belonging to the genus Culicoides (Diptera: Ceratopogonidae) were collected by Mosquito Magnet® and black light traps at 5 sites on Jeju-do, Republic of Korea (Korea), from May-November 2013 to determine species diversity and seasonal distribution. A total of 4,267 specimens were collected, of which 99.9% were female. The most common species was Culicoides tainanus (91.8%), followed by C. lungchiensis (7.2%) and C. punctatus (0.6%), while the remaining 4 species accounted for <0.5% of all Culicoides spp. that were collected. High numbers of C. tainanus were collected in May, followed by decreasing numbers through August, and then increasing numbers through November when surveillance was terminated. Peak numbers of C. lungchiensis were collected during September, with low numbers collected from May-August and October-November. The presence of C. lungchiensis in Korea was confirmed by morphological and molecular analyses.
Collapse
Affiliation(s)
- Heung Chul Kim
- 5th Medical Detachment, 168 th Multifunctional Medical Battalion, 65 th Medical Brigade, Unit 15247, APO AP 96205-5247, USA
| | - Glenn A Bellis
- Charles Darwin University, Darwin Northern Territory 0909, Australia
| | - Myung-Soon Kim
- Foreign Animal Disease Division, Animal and Plant Quarantine Agency, Anyang 430-757, Korea
| | - Terry A Klein
- Public Health Command Region-Pacific, Camp Zama, Japan, Address: 65 th Medical Brigade, Unit 15281, APO AP 96205-5281, USA
| | - David Gopurenko
- NSW Department of Primary Industries, Wagga Wagga Agricultural Institute, Private Mail Bag, Wagga Wagga, New South Wales, 2650, Australia.,Graham Centre for Agricultural Innovation, Locked Bag 588, Wagga Wagga, New South Wales, 2678, Australia
| | - Du-Cheng Cai
- College of Environment and Plant Protection, Hainan University, 58 Renmin Avenue, Haikou, Hainan, 570228, P. R. China
| | - Hyun-Ji Seo
- Foreign Animal Disease Division, Animal and Plant Quarantine Agency, Anyang 430-757, Korea
| | - In-Soo Cho
- Foreign Animal Disease Division, Animal and Plant Quarantine Agency, Anyang 430-757, Korea
| | - Jee-Yong Park
- Foreign Animal Disease Division, Animal and Plant Quarantine Agency, Anyang 430-757, Korea
| |
Collapse
|
10
|
Wei QB, Lei ZR, Nauen R, Cai DC, Gao YL. Abamectin resistance in strains of vegetable leafminer, Liriomyza sativae (Diptera: Agromyzidae) is linked to elevated glutathione S-transferase activity. Insect Sci 2015; 22:243-250. [PMID: 25813391 DOI: 10.1111/1744-7917.12080] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/22/2013] [Indexed: 06/04/2023]
Abstract
Abamectin resistance was selected in the vegetable leafminer, Liriomyza sativae (Blanchard) (Diptera: Agromyzidae) under laboratory conditions, and cross-resistance patterns and possible resistance mechanisms in the abamectin-resistant strains (AL-R, AF-R) were investigated. Compared with the susceptible strain (SS), strain AL-R displayed 39-fold resistance to abamectin after 20 selection cycles during 25 generations, and strain AF-R exhibited 59-fold resistance to abamectin after 16 selection cycles during 22 generations. No cross-resistance to cyromazine was found in both abamectin-resistant strains. However, we failed to select for cyromazine resistance in L. sativae under laboratory conditions by conducting 17 selection cycles during 22 generations. However, moderate levels of cross-resistance to abamectin (6-9 fold) were observed in strains which received cyromazine treatments. Biochemical analysis showed that glutathione S-transferase (GST) activity in both abamectin-resistant strains (AL-R, AF-R) was significantly higher than in the susceptible strain (SS), suggesting metabolically driven resistance to abamectinin L. sativae. Recommendations of mixtures or rotation of cyromazine and abamectin should be considered carefully, as consecutive cyromazine treatments may select for low-level cross-resistance to abamectin.
Collapse
Affiliation(s)
- Qing-Bo Wei
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing; Hainan University, Haikou, 570228, China
| | | | | | | | | |
Collapse
|
11
|
Cai DC, Jin M, Han L, Wu S, Xie ZQ, Zheng XS. Cytogenetic analysis in workers occupationally exposed to nickel carbonyl. Mutat Res 1987; 188:149-52. [PMID: 3108660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Chromosomal aberration and sister-chromatid exchange (SCE) base-line frequencies and SCE frequencies induced by 10 ng/ml mitomycin C (MMC) were analysed in cultured peripheral lymphocytes of 65 workers occupationally exposed to nickel carbonyl Ni(CO)4. The subjects were divided into 4 groups: (1) control; (2) exposed to nickel carbonyl (= exposed); (3) cigarette smokers; (4) smoking-exposed. The results show that there are no significant differences in chromosomal aberration frequencies, breaks or gaps, between the various groups. However, the SCE base-line frequency of the smoking-exposed group, with an average of 7.7/cell, was significantly higher than that of the control group, with an average of 6.5/cell (P less than 0.01), and also than that of the exposed group with an average of 5.9/cell (P less than 0.01). Similarly, the SCE frequency induced by 10 ng/ml MMC in the smoking-exposed group which averaged 15.5/cell was significantly higher than that of the control group (average of 13.2/cell (P less than 0.05], and also than that of the exposed group with an average of 12.3/cell (P less than 0.01). Under our experimental conditions, it may be that the level of exposure was not high enough to elicit an increase in chromosomal aberrations and SCE frequencies in the non-smoker exposed group. The fact that an increase in SCE frequencies was only found in the smoking-exposed group implies that the two factors, smoking and exposure to nickel carbonyl, are jointly responsible for the result.
Collapse
|