1
|
Jin LR, Li CC, Chen C, Wang Y, Wang Y, He M, Ding SN, Wei MW, Tian H, Kong XX, Dong C, Zhou L, Peng JF, Wang ZG, Zhu FC, Zhu LG. [Kinetics of SARS-CoV-2-specific antibodies among inactivated COVID-19 vaccine recipients, SARS-CoV-2 natural infection cases, and breakthrough cases]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:1834-1837. [PMID: 36536574 DOI: 10.3760/cma.j.cn112150-20220621-00639] [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: 06/17/2023]
Abstract
Between August and September, 2021, this study included 605 SARS-CoV-2 natural infection cases and 589 SARS-CoV-2 breakthrough cases from Nanjing and Yangzhou, as well as 690 inactivated COVID-19 vaccine recipients from Changzhou, China. In SARS-CoV-2 natural infection cases, the age range was 19-91 years (median age: 66 year), and the medians(Q1,Q3) of IgG titers were 0.19 (0.06-1.31), 3.70 (0.76-69.48), 15.31 (2.59-82.16), 4.41 (0.99-31.74), 2.31 (0.75-13.83), 2.28 (0.68-9.94) and 2.80 (1.00-9.53) at one to seven weeks after SARS-CoV-2 infection, respectively. In SARS-CoV-2 breakthrough cases, the age range was 18-76 years (median age: 45 year), and the medians(Q1,Q3)of IgG titers were 1.93 (0.34-26.67), 38.87 (7.90-121.0), 75.09 (11.85-123.70), 21.97 (5.20-95.58), 13.97 (3.47-46.82), 9.56 (2.48-33.38) and 4.38 (1.87-11.00) at one to seven weeks after SARS-CoV-2 infection, respectively. In inactivated COVID-19 vaccine recipients, the age range was 18-87 years (median age: 47 years), and the medians(Q1,Q3)of IgG titers were 16.22 (15.84-33.42), 5.35 (2.96-13.23), 3.30 (2.18-6.18), 3.14 (1.16-5.70), 2.77 (1.50-4.52), 2.72 (1.76-4.36), 2.01 (1.27-3.51) and 1.94 (1.35-3.09) at one to eight months after SARS-CoV-2 infection, respectively. The results suggested that IgG antibodies increased gradually within two weeks after SARS-CoV-2 infection, then declined gradually at three to seven weeks in SARS-CoV-2 natural infection cases. In SARS-CoV-2 breakthrough cases, IgG antibodies increased rapidly within two weeks, then declined gradually at three to seven weeks after SARS-CoV-2 infection. Additionally, IgG antibodies decreased rapidly within three months, then decreased gradually and remained at a low level within three months after immunization.
Collapse
Affiliation(s)
- L R Jin
- School of Public Health, Southeast University, Nanjing 210009, China
| | - C C Li
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C Chen
- Institute of Acute Infectious Disease Control, Changzhou Municipal Center for Disease Control and Prevention, Changzhou 213000, China
| | - Y Wang
- Institute of Acute Infectious Disease Control, Yangzhou Municipal Center for Disease Control and Prevention, Yangzhou 225000, China
| | - Y Wang
- Laboratory Department, Yangzhou Municipal Center for Disease Control and Prevention, Yangzhou 225000, China
| | - M He
- Laboratory Department, Nanjing Municipal Center for Disease Control and Prevention, Nanjing 210003, China
| | - S N Ding
- Institute of Acute Infectious Disease Control, Nanjing Municipal Center for Disease Control and Prevention, Nanjing 210003, China
| | - M W Wei
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H Tian
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - X X Kong
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C Dong
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L Zhou
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J F Peng
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Z G Wang
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - F C Zhu
- Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L G Zhu
- School of Public Health, Southeast University, Nanjing 210009, China Institute of Acute Infectious Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| |
Collapse
|
2
|
Xu JF, Jiang J, Yang L, Qian J, Wang H, Chen HM, Liu HJ, Song C, Xu X, Zhu FC, Zhu LG, Zhai XJ. [Association between metabolic risk factors and the hepatitis B reactivation of inactive HBsAg carriers in Jiangsu province: a cohort study]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1301-1308. [PMID: 35981994 DOI: 10.3760/cma.j.cn112338-20211203-00944] [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: 06/15/2023]
Abstract
Objective: To analyze the impact of metabolic risk factors on the epidemiological characteristics of the reactivation of inactive HBsAg carriers (IHC) and provide effective intervention measures to standardize the management of chronic hepatitis B infections. Methods: Based on the chronic hepatitis B infection cohort established in 2010 in Jiangsu province, six follow-up visits from 2012 to 2020 were conducted to analyze the characteristics and influencing factors of the hepatitis B reactivation of IHC and the impact of metabolic risk factors, including obesity, high blood pressure, diabetes and hyperglycemia. Results: From 2012 to 2020, 2 527 IHC and 17 730 person-years were observed during a median follow-up period of 7.0 person-years. Ninety-eight cases of hepatitis B reactivation, with a cumulative reaction rate, was 3.9%, and the incidence density was 5.53/1 000 person-years. Multivariate Cox proportional risk regression analysis showed that age and baseline HBV DNA were independent risk factors of HBV reactivation. Compared with the patients ≥60 years, 40-49 age group (aHR=2.16, 95%CI:1.20-3.90) and 20-29 age group (aHR=5.48, 95%CI:2.07-14.48) were significantly associated with hepatitis B reactivation. Compared with the HBV DNA negative patients at baseline, the risk of hepatitis B reactivation was higher in the group with low HBV DNA level 100-1 999 IU/ml (aHR=1.67, 95%CI:1.11-2.52). Stratification analysis results showed that compared with those without metabolic risk factors, in the ≥50 age group, patients with ≥2 metabolic risk factors showed adjusted HR of 2.73 (95%CI:1.08-6.96). Conclusions: The risk of hepatitis B being reactive is the persistent existence of IHC in communities in Jiangsu province, especially young adults, low-level HBV DNA carriers, and IHC with ≥2 metabolic risk factors. Follow-up for these IHC should be strengthened to reduce the risk of disease progression by antiviral treatment at the right time.
Collapse
Affiliation(s)
- J F Xu
- Department of Acute Infectious Diseases Control and Immunization Programmes, Danyang County Center for Disease Control and Prevention, Danyang 212310, China
| | - J Jiang
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L Yang
- School of Public Health, Xiamen University, Xiamen 361102, China
| | - J Qian
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H Wang
- School of Public Health, Nanjing Medical University, Nanjing 210029, China
| | - H M Chen
- Department of Infectious Disease Control, Zhangjiagang County Center for Disease Control and Prevention, Zhangjiagang 215600, China
| | - H J Liu
- Major Project Executive Office, Taixing County Center for Disease Control and Prevention, Taixing 225400, China
| | - C Song
- Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing 210029, China
| | - X Xu
- Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing 210029, China
| | - F C Zhu
- Key Laboratory of Intestinal Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L G Zhu
- Key Laboratory of Intestinal Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - X J Zhai
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| |
Collapse
|
3
|
|
4
|
Zhu LG, Tian H, Jiang J, Song C, Zou Y, Xu JF, Liu HJ, Peng H, Hu ZB, Zhu FC, Shen HB, Zhai XJ. [Epidemiological characteristics of HBeAg reversion in chronic hepatitis B patients with HBeAg seroconversion in Jiangsu province, 2012-2014]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 38:43-48. [PMID: 28100375 DOI: 10.3760/cma.j.issn.0254-6450.2017.01.008] [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 understand characteristics and influencing factors of reversion of HBeAg in chronic hepatitis B patients with HBeAg sero-conversion, and provide epidemiological evidence for the regular management of chronic hepatitis B patients. Methods: From 2012 to 2014, a cohort study was conducted among the chronic hepatitis B patients with sero-conversion of HBeAg in Jiangsu province. Association between participants' demographics, ALT, HBV DNA and incidence of HBeAg reversion was analyzed by Cox regression model. HBV DNA changing trend between patients with HBeAg reversion and patients with persistent HBeAg sero-conversion was compared by repeated measure data variance analysis. Results: In 2012, there were 5 068 HBeAg seroconverted chronic hepatitis B patients aged (51.9 ± 12.8) years enrolled. By 2014, HBeAg had reversed in 121 cases with the rate of 1.3/100 person-years. The probability of HBeAg reversion decreased with the age of the patients. By Cox regression analysis, HBV DNA level was an important influencing factor for the progress of HBeAg reversion. The patients with HBV DNA≥200 000 IU/ml had a higher HBeAg reversion rate DNA (3.8/100 person-years) than those with HBV DNA <2 000 IU/ml (1.1 person-years) (HR=3.44, 95% CI: 1.91-6.20, P=0.000). Compared with the persistent HBeAg sero-conversion group, HBV DNA and ALT showed a more dramatic increase in the HBeAg reversion group (P=0.000). Conclusions: There was a certain HBeAg reversion rate in chronic hepatitis B patients with HBeAg sero-conversion. Younger chronic CHB patients with HBeAg sero-conversion and those with higher HBV DNA lever had higher HBeAg reversion rate. Following up and management of chronic CHB patients with HBeAg sero-conversion is important and helpful for the control of hepatitis B.
Collapse
Affiliation(s)
- L G Zhu
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H Tian
- Acute Infectious Disease Prevention Section, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J Jiang
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C Song
- School of Public Health, Nanjing Medical University 210029, China
| | - Y Zou
- Epidemic Prevention Section, Zhangjiagang County Center for Disease Control and Prevention, Zhangjiagang 215600, China
| | - J F Xu
- Epidemic Prevention Section, Danyang County Center for Disease Control and Prevention, Danyang 212310, China
| | - H J Liu
- Major Project Executive Office, Taixing County Center for Disease Control and Prevention, Taixing 225400, China
| | - H Peng
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Z B Hu
- Animal Care Facility, Nanjing Medical University 210029, China
| | - F C Zhu
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H B Shen
- School of Public Health, Nanjing Medical University 210029, China
| | - X J Zhai
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| |
Collapse
|
5
|
Zhu LG, Jiang J, Song C, Zou Y, Xu JF, Liu HJ, Peng H, Hu ZB, Zhu FC, Shen HB, Zhai XJ. [A cohort study on the epidemiological characteristics of HBeAg sero-clearance in HBeAg positive chronic hepatitis B patients in Jiangsu province from 2012 to 2014]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 38:179-184. [PMID: 28231662 DOI: 10.3760/cma.j.issn.0254-6450.2017.02.009] [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 understand the epidemiological characteristics and influencing factors related to HBeAg sero-clearance in chronic hepatitis B patients so as to provide evidence for regular management on chronic HBV patients. Methods: From 2012 to 2014, a cohort study was conducted among HBeAg positive chronic HBV patients in Jiangsu province. Association between the characteristics and incidence of HBeAg sero-clearance was analyzed by Cox regression method. The changing trend on HBV DNA between patients with HBeAg sero-clearance and those with persistent HBeAg positive status was compared by repeated measure data variance analysis method. Results: In 2012, there were 721 HBeAg positive hepatitis B patients aged (45.2 ± 14.2) years enrolled in this study. By 2014, the follow-up observation period was 1 058 person-years, and 393 cases had lost their HBeAg status, with the rate as 37.2/100 person-years. The HBeAg sero-clearance rate was 32.4/100 person-years in hepatitis B patients who received antiviral treatment. The probability of HBeAg clearance in HBeAg positive hepatitis B patients aged ≥60 year (62.0/100 person-years) was higher than those of aged <20 year (7.0/100 person-years). The rate of HBeAg sero-clearance in HBeAg positive patients with HBV DNA <20 000 IU/ml (75.8/100 person-years) was higher than those whose HBV DNA were ≥200 000 IU/ml (16.1/100 person-years). By Cox regression analysis, the HBV DNA level was an important influencing factor on the progress of HBeAg sero-clearance. Patients with HBV DNA levle as ≥200 000 IU/ml, had a lower HBeAg clearance rate (HR=0.18, 95%CI: 0.13-0.23, P<0.001). Compared to the persistent HBeAg positive group, HBV DNA showed a more dramatic fall in the HBeAg-lost group (P<0.001). Conclusion: The rate of HBeAg sero-clearance among HBeAg positive hepatitis B patients was correlated with age and HBV DNA status of the patients that called for comprehensive management and intervention programs to develop for the HBeAg positive hepatitis B patients with different characteristics.
Collapse
Affiliation(s)
- L G Zhu
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J Jiang
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C Song
- School of Public Health, Nanjing Medical University, Nanjing 210029, China
| | - Y Zou
- Epidemic Prevention Section, Zhangjiagang City Center for Disease Control and Prevention, Zhangjiagang 215600, China
| | - J F Xu
- Epidemic Prevention Section, Danyang City Center for Disease Control and Prevention, Danyang 212310, China
| | - H J Liu
- Major Project Executive Office, Taixing City Center for Disease Control and Prevention, Taixing 225400, China
| | - H Peng
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Z B Hu
- Animal Care Facility, Nanjing Medical University, Nanjing 210029, China
| | - F C Zhu
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H B Shen
- School of Public Health, Nanjing Medical University, Nanjing 210029, China
| | - X J Zhai
- Major Project Executive Office, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| |
Collapse
|
6
|
Xu K, Bao CC, Wang J, Zhu LG, Xu JF, Peng H, Zhai XJ. [Prognosis and related risk factors for 465 subjects infected with hepatitis C virus in Danyang, Jiangsu province]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 38:194-199. [PMID: 28231665 DOI: 10.3760/cma.j.issn.0254-6450.2017.02.012] [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 features and viral load of persons infected with HCV and the risk factors for severe outcomes. Methods: Medical testing and questionnaire survey were conducted on 465 cases who were infected with HCV, 20-30 years back. HCV RNA, alanine transaminase (ALT), aspartate transaminase (AST), albumin, globulin and bilirubin were tested for these subjects. Factors as demography, tobacco and alcohol consumption, SNP of rs7453920 and rs2856718 on HLA-DQ gene of subjects with HCV RNA, were analyzed by multiple logistic regression method to explore the risk factors for severe outcomes among the patients. Result: Totally, 465 subjects had symptoms as hypodynamic (15.70%, 73/465), digestive system (17.63%, 82/465), and arthrodynia (10.32%, 48/465). HCV RNA was positive in 68.60% (319/465) of the subjects with median viral load as 76.01×10(4) copies/ml (min-max: 592 copies/ml -1.08×10(10) copies/ml). Totally, 11.83% (55/465) of the cases appeared having liver inflammation by routine ultrasound exams. ALT and AST was seen higher than 80 (IU/L) in 12.70% (59/465) and 11.18% (52/465) of the subjects, separately. Factors as being male (OR =2.298, 95%CI: 1.247-4.238), GA genotype compared with AA type in rs2856718 (OR=1.716, 95%CI: 1.070-2.752), alcohol intake ≥7 times per-week (OR=2.966, 95% CI: 0.979-8.988) etc., were independently related to HCV RNA sustained positivity. Factors as: being male (OR=1.694, 95%CI: 0.975-2.942), in 50-59 years age group (OR=2.414, 95%CI: 1.156-5.042), having other liver diseases (OR=2.592, 95% CI: 1.105-6.079) and carrying positive HCV RNA (OR=3.479, 95% CI: 1.648-7.343) etc. were independent risk factors for abnormal liver function. Conclusion: High rates of carrying sustained positive HCV RNA and abnormal liver function appeared in subjects who got the HCV infection 20-30 years ago. Factors as being male, in old age, being frequent alcohol taker, GA genotype in rs2856718 and with other liver diseases etc. were related to higher risk for developing severe outcomes.
Collapse
Affiliation(s)
- K Xu
- Department of Acute Infectious Disease Prevention and Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C C Bao
- Department of Acute Infectious Disease Prevention and Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J Wang
- School of Nursing, Nanjing Medical University, Nanjing 210029, China
| | - L G Zhu
- Department of National Science and Technology Major Project, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J F Xu
- Department of Acute Infectious Disease Prevention and Control, Danyang Center for Disease Control and Prevention, Danyang 212300, China
| | - H Peng
- Department of National Science and Technology Major Project, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - X J Zhai
- Department of Acute Infectious Disease Prevention and Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China; Department of National Science and Technology Major Project, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| |
Collapse
|
7
|
Brewer MS, Zhu LG, McKeith FK. Marbling effects on quality characteristics of pork loin chops: consumer purchase intent, visual and sensory characteristics. Meat Sci 2012; 59:153-63. [PMID: 22062673 DOI: 10.1016/s0309-1740(01)00065-1] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2000] [Revised: 02/12/2001] [Accepted: 02/12/2001] [Indexed: 10/18/2022]
Abstract
These studies evaluated whether consumers detect differences among pork loin chops with low (1.05% fat), medium (2.33%) and high (3.46%) amounts of marbling when visually evaluated, when prepared under controlled conditions, and when prepared at home. Highly marbled chops appeared lighter colored, less lean, had less acceptable appearance, and were less likely to be purchased than leaner chops; they were juicier, more tender, oily and flavorful than leaner chops. These results indicate a disparity between purchase intent based on visual evaluation, and quality attributes of the cooked product. When evaluated at home, consumers rated the chops they chose (40% low, 40% medium marbled) as more tender, juicy and flavorful than chops they evaluated "blind" on-site suggesting that additional factors have a significant impact on stated purchase intent.
Collapse
Affiliation(s)
- M S Brewer
- Department of Food Science and Human Nutrition, University of Illinois, 399 Bevier Hall, 905 S. Goodwin Avenue, Urbana, IL 61801, USA
| | | | | |
Collapse
|
8
|
Wang Y, Xue YM, Mohanty P, Natale A, Li L, Wu WF, Zhu CM, Liu H, Zhong GQ, Zhu LG, Zeng ZH, Wang DW. Dilator method and needle method for atrial transseptal puncture: a retrospective study from a cohort of 4443 patients. Europace 2012; 14:1450-1456. [DOI: 10.1093/europace/eus148] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
|
9
|
Zhang J, Zhu LG. Synthesis, crystal structure, and properties of a novel coordination polymer constructed from a trinickel string core of [Ni3(Dpa)4]2+ and pyrazine-2,3-dicarboxylate. RUSS J COORD CHEM+ 2011. [DOI: 10.1134/s1070328411090156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
10
|
|
11
|
Tang WX, Qu Y, Zhang SY, Zhu LG, Dai AB. A model study on mode of bonding of cisplatin with DNA. Sci Sin B 1986; 29:126-35. [PMID: 3749867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The interaction of cis-[Pt(NH3)2Cl2] with nucleosides, as constituents of DNA, was studied by spectrophotometric, 13C NMR and CNDO/2 methods. The apparent stability constants of the complexes formed and the initial rate of formation were determined. The sites of binding of nucleoside (or nucleotide) with Cisplatin were ascertained and the electronic structure of the model coordination compounds of Cisplatin and guanine was calculated by MO approach. On the basis of the obtained results, the mechanism of the antitumour action of Cisplatin was discussed, and a new possible mode of bonding of Cisplatin with DNA was proposed.
Collapse
|