1
|
Wang S, Mei Y, Yang ZY, Zhang Q, Li RL, Wang YY, Zhao WH, Xu T. [Comparison of two child growth standards in assessing the nutritional status of children under 6 years of age]. Zhonghua Er Ke Za Zhi 2023; 61:700-707. [PMID: 37528010 DOI: 10.3760/cma.j.cn112140-20230505-00314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Objective: To compare the application of China growth standard for children under 7 years of age (China standards) and World Health Organization child growth standards (WHO standards) in evaluating the prevalence of malnutrition in children aged 0-<6 years in China. Methods: The research data came from the national special program for science & technology basic resources investigation of China, named "2019-2021 survey and application of China's nutrition and health system for children aged 0-18 years". Multi-stage stratified random sampling was used to recruit 28 districts (regions) in 14 provinces, autonomous regions or municipalities across the country. Children (n=38 848) were physically measured and questionnaires were conducted in the guardians of the children. The indicators of stunting, underweight, wasting, overweight and obesity were evaluated by China standards and WHO standards respectively. Chi-square test was used to comparing the prevalence of each nutritional status between the two standards, as well as the comparison between the two standards by gender and age. Results: Among the 38 848 children, 19 650 were boys (50.6%) and 19 198 were girls (49.4%), 19 480 urban children (50.1%) and 19 368 rural children (49.9%). The stunting, underweight and wasting cases in the study population were 2 090 children (5.4%), 1 354 children (3.5%) and 1 276 children (3.3%) according to the China standards, and 1 474 children (3.8%), 701 children (1.8%) and 824 children (2.1%) according to the WHO standards, respectively; the above rates according to the China standards were slightly higher than those to the WHO standards (χ2=111.59, 213.14, and 99.99, all P<0.001). The overweight and obesity cases in the study population were 2 186 children (5.6%) and 1 153 children (3.0%) according to the China standards, and 2 210 children (5.7%) and 1 186 children (3.1%) according to the WHO standards, with no statistically significant differences (χ2=0.14 and 0.48, P=0.709 and 0.488, respectively). Compared to the results based on WHO standards, the China standards showed a lower prevalence of overweight and obesity in boys (χ2=14.95 and 5.85, P<0.001 and =0.016, respectively), and higher prevalence of overweight in girls (χ2=12.60, P<0.001); but there was no statistically significant differences in girls' obesity prevalence between the two standards (χ2=2.62, P=0.106). Conclusions: In general, the prevalence of malnutrition among children aged 0-<6 years based on China standards is slightly higher than that on WHO standards. To evaluate the nutritional status of children, it is advisable to select appropriate child growth standards based on work requirements, norms or research objectives.
Collapse
Affiliation(s)
- S Wang
- National Center for Women and Children's Health, Chinese Center for Disease Control and Prevention, Beijing 100081, China
| | - Y Mei
- National Center for Women and Children's Health, Chinese Center for Disease Control and Prevention, Beijing 100081, China
| | - Z Y Yang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Q Zhang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - R L Li
- Department of Children Health and Development, Capital Institute of Pediatrics, Beijing 100020, China
| | - Y Y Wang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - W H Zhao
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - T Xu
- National Center for Women and Children's Health, Chinese Center for Disease Control and Prevention, Beijing 100081, China
| |
Collapse
|
2
|
Gao WW, Ma YT, Ma YY, Li RL, Li J, Zheng FG, Zheng WB, Liu Q, Zhu XQ. First report of Eimeria and Entamoeba infection in alpacas (Vicugna pacos) in Shanxi Province, northern China. Parasitol Res 2021; 120:2031-2035. [PMID: 33884491 DOI: 10.1007/s00436-021-07157-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/15/2021] [Accepted: 04/06/2021] [Indexed: 11/29/2022]
Abstract
Intestinal protozoa Eimeria and Entamoeba can infect many animal species including alpacas. However, data on the prevalence and pathogenicity of species of the two genera Eimeria and Entamoeba in alpacas in China is scarce. The current study was carried out to investigate the prevalence of Eimeria and Entamoeba in alpacas in two cities (Taiyuan and Xinzhou) in Shanxi Province, northern China, using PCR-based approaches. Eimeria spp. were only found in Taiyuan city, and the overall prevalence was 1.64%. All samples collected from male alpacas were PCR-negative for Eimeria. Four Eimeria-positive samples were tested positive as Eimeria lamae. The molecular prevalence of Entamoeba in alpacas was 18.03% (66/366), including 16.39% (50/305) in alpacas from Taiyuan city and 26.23% (16/61) from Xinzhou city, respectively. The Entamoeba prevalence in male alpacas (25.00%) was significantly higher than that in female alpacas (15.69%). Entamoeba bovis was the predominant species, and no Entamoeba histolytica infection was detected. Nine unique SSU rRNA gene sequences of Entamoeba were obtained which formed a new cluster. The results showed that sex and location might be the risk factors associated with prevalence of Eimeria spp., and sex might be the risk factor associated with prevalence of Entamoeba spp.. This is the first report of Entamoeba in alpacas worldwide. These findings expand our understanding of the prevalence and genetic diversity of Eimeria and Entamoeba in alpacas.
Collapse
Affiliation(s)
- Wen-Wei Gao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Ye-Ting Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China.,State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, People's Republic of China
| | - Yuan-Yuan Ma
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, People's Republic of China
| | - Run-Li Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Jin Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Fu-Guo Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Wen-Bin Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Qing Liu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China
| | - Xing-Quan Zhu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, People's Republic of China. .,State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, People's Republic of China. .,Key Laboratory of Veterinary Public Health of Higher Education of Yunnan Province, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, Yunnan Province, 650201, People's Republic of China.
| |
Collapse
|
3
|
Jia YP, Cao GQ, Zhao R, Zhang Y, He LW, Wei YF, Huang L, Li RL, Gao XD, Jia N, Yang C, Shen F. [Interpretation for the group standards in technical specification for health risk investigation of central air conditioning ventilation system during coronavirus disease 2019 epidemic]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:1381-1384. [PMID: 33076588 DOI: 10.3760/cma.j.cn112338-20200514-00722] [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
The central air conditioning ventilation system plays an important role in the air circulation of buildings such as centralized isolation medical observation points and general public buildings. In order to meet the requirements of COVID-19 epidemic prevention and control, Beijing Preventive Medicine Association organized Beijing CDC and other professional institutes to write up the group standard entitled "Technical specification for health risk investigation of central air conditioning ventilation system during the COVID-19 epidemic (T/BPMA 0006-2020)" . According to the particularity of central air conditioning ventilation system risk control during the outbreak of similar respiratory infectious diseases, based on current laws and regulations and the principle of scientific, practical, consistency and normative, 8 key points of risk investigations were summarized, which were the location of fresh air outlet, air conditioning mode, air return mode, air system, air distribution, fresh air volume, exhaust and air conditioner components. The contents, process, method, data analysis and conclusion of the investigation implementation were also defined and unified. It could standardize and guide institutions such as disease control and health supervision to carry out relevant risk managements, and provided solutions and technical supports for such major public health emergencies in city operations.
Collapse
Affiliation(s)
- Y P Jia
- Beijing Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - G Q Cao
- China Academy of Building Research, Institute of Building Environment and Energy, Beijing 100013, China
| | - R Zhao
- Beijing Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - Y Zhang
- Beijing Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - L W He
- Beijing Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Beijing 100013, China
| | - Y F Wei
- Chaoyang District Center for Disease Prevention and Control, Beijing 100021, China
| | - L Huang
- Dongcheng District Center for Disease Prevention and Control, Beijing 100036, China
| | - R L Li
- Xicheng District Center for Disease Prevention and Control, Beijing 100029, China
| | - X D Gao
- Beijing Municipal Health Supervision Institute, Beijing 100034, China
| | - N Jia
- Dongcheng District Health Supervision Institute, Beijing 100027, China
| | - C Yang
- Dongcheng District Health Supervision Institute, Beijing 100027, China
| | - F Shen
- Beijing Center for Disease Prevention and Control, Beijing Research Center for Preventive Medicine, Beijing 100013, China
| |
Collapse
|
4
|
Li J, Ma YT, Liang QL, Li RL, Zheng FG, Liu Q, Zhu XQ, Gao WW. Serological evidence of Toxoplasma gondii and Chlamydia infection in alpacas (Vicugna pacos) in Shanxi Province, northern China. Microb Pathog 2020; 149:104399. [PMID: 32693119 DOI: 10.1016/j.micpath.2020.104399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 11/18/2022]
Abstract
Toxoplasma gondii, Neospora caninum, Chlamydia and bluetongue virus (BTV) are four important pathogens which can cause reproductive loss. The present study was conducted to estimate the seroprevalence of T. gondii, N. caninum, Chlamydia and BTV in alpacas in Shanxi Province, northern China. A total of 251 serum samples were collected from alpacas, and antibodies against T. gondii and Chlamydia were examined by the modified agglutination test (MAT) and indirect hemagglutination assay (IHA), respectively. Antibodies to N. caninum and BTV were determined by using the commercially available competitive enzyme-linked immunosorbent assay (cELISA) kits, respectively. The overall seroprevalence of T. gondii was 9.16% (95% CI 5.59-12.73) in the three sampled counties, of which, no T. gondii-seropositive samples were detected in alpacas in Fanshi County. Gender differences in the T. gondii seroprevalence were observed. The overall Chlamydia seroprevalence was 13.94% (95% CI: 9.66-18.22), and there was a statistically significant difference in Chlamydia seroprevalence in alpacas between the two counties, Jiexiu and Fanshi. All serum samples tested negative for N. caninum and BTV antibodies, respectively. To our knowledge, this is the first report of T. gondii and Chlamydia seroprevalence in alpacas in China, which provides baseline information for controlling T. gondii and Chlamydia infection in alpacas in China.
Collapse
Affiliation(s)
- Jin Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China.
| | - Ye-Ting Ma
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China; State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, PR China.
| | - Qin-Li Liang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, PR China.
| | - Run-Li Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China.
| | - Fu-Guo Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China.
| | - Qing Liu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China.
| | - Xing-Quan Zhu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, PR China; Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University College of Veterinary Medicine, Yangzhou, Jiangsu Province, 225009, PR China.
| | - Wen-Wei Gao
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi Province, 030801, PR China.
| |
Collapse
|
5
|
Li RL, Hao CN, Huang JJ, Shi YQ, Duan JL. ASSA14-03-01 Pulsed Electromagnetic Field Improves Postnatal Neovascularization in Response to Hindlimb Ischemia. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.20] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
6
|
Huang JJ, Hao CN, Shi YQ, Li RL, Duan JL. ASSA14-15-01 Angiogenesis effect of therapeutic ultrasound on ischaemic hind limb in mice. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
7
|
|
8
|
Yan YL, Chen X, Liang HJ, Wang J, Li TJ, Li RL, Li S, Qin X. Lack of association between EPHX1 polymorphism and esophageal cancer risk: evidence from meta-analysis. Dis Esophagus 2014; 28:164-71. [PMID: 25714851 DOI: 10.1111/dote.12169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The microsomal epoxide hydrolase 1 (EPHX1) Tyr113His and His139Arg polymorphisms have been reported to be associated with esophageal cancer (EC) risk, yet the results of these previous results have been inconsistent or controversial. The objective of this study was to explore whether the EPHX1 Tyr113His and His139Arg polymorphisms confer risk to EC. The relevant studies were identified through a search of PubMed, Excerpta Medica Database (Embase), Elsevier Science Direct, and Chinese Biomedical Literature Database until May 2013. The association between the EPHX1 Tyr113His and His139Arg polymorphisms and EC risk was pooled by odds ratios (ORs) together with their 95% confidence intervals (95%CIs). A total of eight case-control studies with 1163 EC patients and 1868 controls (seven studies for both Tyr113His and His139Arg polymorphisms, one study only for Tyr113His polymorphism) were eventually identified. We found no association between EPHX1 Tyr113His and His139Arg polymorphisms and EC risk in overall population (For Tyr113His: His vs. Tyr: OR = 1.05, 95%CI = 0.95-1.15, P = 0.379; His/His vs. Tyr/Tyr: OR = 1.04, 95%CI = 0.88-1.22, P = 0.208; His/Tyr vs. Tyr/Tyr: OR = 0.96, 95%CI = 0.80-1.15, P = 0.577; His/His vs. His/Tyr + Tyr/Tyr: OR = 1.10, 95%CI = 0.96-1.26, P = 0.164; His/His + His/Tyr vs. Tyr/Tyr: OR = 1.01, 95%CI = 0.90-1.12, P = 0.543. For His139Arg: Arg vs. His: OR = 1.04, 95%CI = 0.94-1.14, P = 0.465; Arg/Arg vs. His/His: OR = 1.06, 95%CI = 0.91-1.24, P = 0.470; Arg/His vs. His/His: OR = 1.03, 95%CI = 0.91-1.16, P = 0.673; Arg/Arg vs. Arg/His + His/His: OR = 1.04, 95%CI = 0.85-1.27, P = 0.708; Arg/Arg + Arg/His vs. His/His: OR = 1.02, 95%CI = 0.93-1.13, P = 0.617). In subgroup analysis based on ethnicity, significant association has been found in neither EPHX1 Tyr113His nor His139Arg polymorphism. The current meta-analysis suggests no evidence of association between the EPHX1 polymorphism and EC risk.
Collapse
Affiliation(s)
- Y L Yan
- Department of Clinical Laboratory, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Abstract
Phosphoenolpyruvate carboxykinase 1 (PCK1), also named PEPCK-C, is a multiple-function gene that is involved in gluconeogenesis, glyceroneogenesis, reproduction, female fertility, and development of obesity and diabetes. How its many functions are regulated was largely unknown. Therefore, we investigated mRNA expression and possible splice variants of PCK1 by screening cDNA in nine tissues from Holstein bulls and cows. PCK1 mRNA was highly expressed in the liver, kidney, ovary and testis; expression levels were low in the heart, spleen, and lung tissues. Expression of this gene was not detected in skeletal muscle. This led to the discovery of five novel bovine splice variants, named PCK1-AS1-PCK1-AS5. In PCK1-AS1, 51 nucleotides in the interior of exon 2 were spliced out. In PCK1-AS2, exons 2 and 3 were altered by the alternative 3' and 5' splice sites, respectively. PCK1-AS3 was truncated from the 3' end of exon 2 to the 5' end of exon 4. In PCK1-AS4, exon 5 was completely spliced out. In PCK1-AS5, exons 5 and 6 and the 5' end of exon 7 were spliced out. These splice variants (PCK1-AS1-PCK1-AS5) potentially encoded shorter proteins (605, 546, 373, 246 and 274 amino acids, respectively), when compared to the complete protein (622 amino acids). Considering the functional domains of the PCK1 protein, it is likely that these splice variants considerably affect the function of this protein; alternative splicing could be one of the mechanisms by which the diverse functions of PCK1 are regulated.
Collapse
Affiliation(s)
- Z B Zhang
- College of Animal Science and Technology, Shihezi University, Shihezi, China
| | | | | | | | | | | | | |
Collapse
|
10
|
Yang Y, Huang JM, Ju ZH, Li QL, Zhou L, Li RL, Li JB, Shi FX, Zhong JF, Wang CF. Increased expression of a novel splice variant of the complement component 4 (C4A) gene in mastitis-infected dairy cattle. Genet Mol Res 2012; 11:2909-16. [PMID: 22653646 DOI: 10.4238/2012.may.18.12] [Citation(s) in RCA: 8] [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] [Indexed: 11/03/2022]
Abstract
The complement system helps in the direct lysis of invading pathogens and modulates phagocytic, humoral and cellular immune responses. Complement 4 is a critical component in complement activity and protection against many bacterial pathogens because it is essential to classical and lectin activation pathways. We used reverse transcription and PCR to investigate alternative splicing and expression of the complement component 4 (C4A) gene in Chinese Holstein cattle. The PCR products were cloned and sequenced. A novel splice variant involving intron 10 was identified, which we named C4A-AS. To examine how C4A gene activity is affected by bovine mastitis, six Chinese Holstein cattle were divided into healthy (non-mastitic) and Staphylococcus aureus-induced mastitic groups. Real-time quantitative PCR (qRT-PCR) revealed that the C4A-complete and C4A-AS transcripts are expressed at significantly different levels in healthy cows, while there were no significant differences in the mastitic group (P = 0.257). Expression of C4A-AS increased significantly when mastitis developed. We also examined the expression of C4A-complete and C4A-AS in several tissues (liver, heart, spleen, lung, kidney, tongue, and muscle). The two transcripts were expressed in all of these tissues but there were no significant differences in expression between healthy and mastitic cows. We therefore conclude that the C4A-complete transcript is the main transcript under normal physiological conditions, while C4A-AS is augmented when mastitis develops.
Collapse
Affiliation(s)
- Y Yang
- Dairy Cattle Science Research Center, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Goldstein JL, Zhao TJ, Li RL, Sherbet DP, Liang G, Brown MS. Surviving starvation: essential role of the ghrelin-growth hormone axis. Cold Spring Harb Symp Quant Biol 2011; 76:121-7. [PMID: 21785007 DOI: 10.1101/sqb.2011.76.010447] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
After brief starvation, vertebrates maintain blood glucose by releasing fatty acids from adipose tissue. The fatty acids provide energy for gluconeogenesis in liver and are taken up by muscle, sparing glucose. After prolonged starvation, fat stores are depleted, yet blood glucose can be maintained at levels sufficient to preserve life. Using a new mouse model, we demonstrate that survival after prolonged starvation requires ghrelin, an octanoylated peptide hormone that stimulates growth hormone (GH) secretion. We studied wild-type mice and mice lacking ghrelin as a result of knockout of GOAT, the enzyme that attaches octanoate to ghrelin. Mice were fed 40% of their normal intake for 7 d. Fat stores in both lines of mice became depleted after 4 d. On day 7, mice were fasted for 23 h. In wild-type mice, ghrelin and GH rose massively, and blood sugar was maintained at ~60 mg/dL. In Goat(-/-) mice, ghrelin was undetectable and GH failed to rise appropriately. Blood sugar declined to ~20 mg/dL, and the animals were moribund. Infusion of ghrelin or GH prevented hypoglycemia. Our results support the following sequence: (1) Starvation lowers blood glucose; (2) glucose-sensing neurons respond by activating sympathetic neurons; (3) norepinephrine, released in the stomach, stimulates ghrelin secretion; (4) ghrelin releases GH, which maintains blood glucose. Thus, ghrelin lies at the center of a hormonal response that permits mice to survive an acute fast superimposed on chronic starvation.
Collapse
Affiliation(s)
- J L Goldstein
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9046, USA.
| | | | | | | | | | | |
Collapse
|
12
|
Ju ZH, Li QL, Huang JM, Hou MH, Li RL, Li JB, Zhong JF, Wang CF. Three novel SNPs of the bovine Tf gene in Chinese native cattle and their associations with milk production traits. Genet Mol Res 2011; 10:340-52. [PMID: 21365550 DOI: 10.4238/vol10-1gmr1038] [Citation(s) in RCA: 9] [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] [Indexed: 11/03/2022]
Abstract
Transferrin (Tf) is a β-globulin protein that transports iron ions in mammalian cells. It contributes to innate immunity to microbial pathogens, primarily by limiting microbial access to iron. Thus, polymorphisms present in bovine Tf could potentially underlie inherited differences in mastitis resistance and milk production traits. We detected three novel single-nucleotide polymorphisms of the Tf gene in Chinese native cattle by screening for genetic variation of Tf in 751 individuals of three Chinese cattle breeds, namely China Holstein, Luxi Yellow and Bohai Black, using PCR-RFLP and DNA sequencing techniques. The three new SNPs, g.-1748G>A ss250608649, g.13942T>C ss250608650, and g.14037A>G ss250608651, had allele frequencies of 85.9, 86.3 and 92.5%, 64.5, 73.3 and 65.0%, and 67.6, 73.7 and 60.0%, respectively. SNP g.-1748G>A was located in the 5' flanking region of Tf. SNP g.14037A>G was located in intron 8 of Tf. SNP g.13942T>C, located in exon 8 of Tf, was a synonymous mutation (TTA > CTA), encoding a leucine (326 aa) in the Tf protein. Associations of the Tf SNPs with milk traits were also analyzed. Significant (P < 0.05) relationships among the Tf polymorphisms, somatic cell scores (SCS), and milk productive traits were observed. Cows with genotypes TT (g.13942T>C), GG (g.-1748G>A) and AG (g.14037A>G) had a lower SCS and higher protein levels and 305-day milk yield. Nineteen combinations of different haplotypes from the three SNPs were identified in Chinese Holstein cattle. The haplotype combination ATA/GCA, GCA/GCA and GCG/ GTA was dominant in cows with a lower SCS, a higher protein level and a higher 305-day milk yield, respectively. Moreover, the gene expression level of Tf was higher in mastitis-affected mammary tissues than in normal mammary tissues. These results suggest that the Tf gene affects milk production, as well as mastitis-resistance traits, in Chinese Holsteins.
Collapse
Affiliation(s)
- Z H Ju
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, Jinan, Shandong Province, China
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
Three new stilbene trimers, gnetuhainins M-O (1-3), were isolated from the lianas of Gnetum hainanense. Their structures and relative configurations were determined by spectroscopic evidence, especially on 2D NMR analysis. The anti-inflammatory activity has been tested for the isolated compounds.
Collapse
Affiliation(s)
- K S Huang
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | | | | | | |
Collapse
|
14
|
Abstract
Five stilbene dimers, gnetuhainins F-J, were isolated together with gnetulin, rhapontigenin, isorhapontigenin and gnetol from the lianas of Gnetum hainanense C. Y. Cheng. Their structures and stereochemistry have been established on the basis of spectral evidence, especially 2D NMR spectroscopic techniques.
Collapse
Affiliation(s)
- K S Huang
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | | | | | | |
Collapse
|
15
|
Abstract
Five new stilbene dimers, gnetuhainins A-E (1-5), were isolated together with resveratrol trans-dehydrodimer (6), resveratrol, oxyresveratrol, and (-)-epsilon-viniferin from the lianas of Gnetum hainanense. Their structures and stereochemistry were determined on the basis of their chemical and spectral data. Compounds 1-5 are dimers formed by a resveratrol unit and an oxyresveratrol unit and belong to a new type of oligostilbenes polymerized from two different stilbene units.
Collapse
Affiliation(s)
- K S Huang
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Xiannongtan Street, Beijing 100050, People's Republic of China
| | | | | | | |
Collapse
|
16
|
Abstract
"Herbal Ecstacy" (sic) is an alternative drug of abuse usually containing both ephedrine and caffeine. Our literature search did not reveal any other reported cases of cardiovascular toxicity related to herbal "drugs of abuse." A case of cardiovascular toxicity following the ingestion of herbal ecstacy is presented. A 21-year-old male presented to the emergency department with an initial blood pressure of 220/110 mmHg and ventricular dysrhythmias after ingesting four capsules of herbal ecstacy. He was treated with lidocaine and sodium nitroprusside, and his symptoms resolved in 9 h. The pathophysiology and clinical course of ephedrine toxicity are discussed. Emergency physicians should consider ephedrine preparations in the differential diagnosis of patients presenting with a sympathomimetic toxidrome. Drugs of abuse containing "herbal" products can produce serious morbidity and mortality.
Collapse
Affiliation(s)
- K A Zahn
- Division of Emergency Medicine, University of British Columbia, Vancouver, Canada
| | | | | |
Collapse
|
17
|
Li RL, Tang H, Cao G, Chen RT. Optically heterodyned 25-GHz true-time-delay lines on thick LD-3 polymer-based planar waveguides. Appl Opt 1997; 36:4269-4272. [PMID: 18253455 DOI: 10.1364/ao.36.004269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Synthesis of the LD-3 electro-optic polymer has resulted in a highly reliable nonlinear organic material. Such a success has been impeded from further progress because the LD-3 films produced thus far are too thin (<0.5 mum) to form a waveguide. Further details of material synthesis have to be studied to solve this problem. We report the formation of thick LD-3 films ranging from 1.2 to 2.4 mum by introducing cyclopentanone as the new solvent in polymer synthesis. The formation of multimode planar waveguides on silicon with a waveguide loss of approximately 1.3 dB/cm at 1.3 mum is demonstrated. Preliminary studies aimed at forming true-time-delay lines are conducted by use of various waveguide lengths in conjunction with an optical heterodyne technique. Waveguide settings equivalent to different true-time-delay lines with a delay time of up to 0.27 ns and a base bandwidth of 25 GHz are demonstrated with a signal-to-noise ratio of 15 dB.
Collapse
|
18
|
Li RL, Liu PL, Wu XC. [Clinical and experimental study on sustained release tablet of Tripterygium wilfordii in treating rheumatoid arthritis]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1996; 16:10-3. [PMID: 8732122] [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: 02/01/2023]
Abstract
Adopt to the prospective, multi-center, random, single-blind, equal rank-control methods, 226 patients of rheumatoid arthritis diagnosed according to the ARA criteria, were divided into 2 groups. One hundred and fourteen patients of test group were treated with sustained release tablets of Tripterygium wilfordii (TW-SR) orally, 2 tablets, twice a day for 4 weeks, 112 patients of control group received tablets of Tripterygium wilfordii (TW) orally, 2 tablets 3 times per day for 4 weeks. Results showed that the total effective rate of the two groups were 92.11% and 90.65%, respectively (P > 0.05). The adverse reaction rate of TW-SR group was 20.18%, which was lowered than that of TW group (70.54%, P < 0.01). Results of pre-clinical pharmacologic experimental study showed that the TW-SR has obvious anti-inflammatory, analgesia and immunosuppress'ive action as the TW has, while its toxicity was less than the latter significantly.
Collapse
Affiliation(s)
- R L Li
- Honghu Institute of Rheumatic Disease, Hubei
| | | | | |
Collapse
|
19
|
Abstract
The in vivo release rate of levonorgestrel-containing silicon capsule (in vitro releasing rate: 6 micrograms/d) placed in rabbits was determined. The results showed that the average release per year was 8.32 micrograms with r being 0.96000. The release pattern of the levonorgestrel-containing silicon capsule system was proved to be zero-order release. Our study provided some experimental data for clinical use of the system for birth control.
Collapse
Affiliation(s)
- C J Wu
- Birth Control Institution, Tongji Medical University, Wuhan
| | | | | | | |
Collapse
|
20
|
Abstract
In this study we compared the effects of radiofrequency (RF) energy applied to the swine endocardium in a unipolar fashion and in a bipolar one with two different interelectrode distances (5 mm, 10 mm). RF energy (500 kHz) delivered to the swine endocardium was divided into eight categories: 100 J, 101-200 J, 201-300 J, 301-400 J, 401-500 J, 501-600 J, 601-1000 J, and > 1000 J. The results showed that when RF energy was applied in a bipolar fashion, the lesions involved the catheter/tissue interface and partly the interelectrode spacing, while in a unipolar fashion. They were found in the catheter/tissue interface only. At any energy level, there were no statistically significant differences in lesion depths among all the three fashions, and the lesion surface areas produced by the bipolar fashion (with 5 mm or 10 mm interelectrode spacing) were all greater than those by the unipolar fashion (P < 0.05). When the delivered energy was under 500 joules, a greater lesion surface area was found in 5 mm bipolar fashion than in 10mm bipolar fashion (P < 0.05), while energy exceeded 500 joules, the differences in the lesion surface areas were no longer significant between these two bipolar fashions.
Collapse
Affiliation(s)
- Y G Wang
- Department of Cardiology, Tongji Hospital, Tongji Medical University, Wuhan
| | | | | | | | | |
Collapse
|
21
|
Li RL. [Combination of surgery, radiotherapy and chemotherapy for rectal cancer--a 423 cases report]. Zhonghua Zhong Liu Za Zhi 1992; 14:213-5. [PMID: 1327697] [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: 12/26/2022]
Abstract
From June 1975 to June 1985, 423 patients with rectal carcinoma were randomized into 4 groups: 1. Surgery alone (S), 2. Pre-operative radiotherapy plus surgery (RS), 3. Surgery plus postoperative chemotherapy (SC), and 4. Preoperative radiotherapy plus surgery followed by postoperative chemotherapy (RSC). The 5-year survival rates of the combination groups: RS-34.4% (55/160); SC-47.5% (19/40); RSC-52.4%-(33/63) were all superior to that of S alone-28.8% (40/160). The difference between RSC and S alone was particularly significant (P less than 0.01). Further studies are warranted.
Collapse
MESH Headings
- Adenocarcinoma, Mucinous/mortality
- Adenocarcinoma, Mucinous/pathology
- Adenocarcinoma, Mucinous/therapy
- Adolescent
- Adult
- Aged
- Carcinoma, Intraductal, Noninfiltrating/mortality
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Carcinoma, Intraductal, Noninfiltrating/therapy
- Chemotherapy, Adjuvant
- Combined Modality Therapy
- Female
- Humans
- Lymphatic Metastasis
- Male
- Middle Aged
- Rectal Neoplasms/mortality
- Rectal Neoplasms/pathology
- Rectal Neoplasms/therapy
- Survival Rate
Collapse
Affiliation(s)
- R L Li
- Haerbin Medical College Thrid Hospital, Heilogjiang
| |
Collapse
|
22
|
Li RL. [Summary of second national symposium of Tripterygium wilfordii]. Zhong Xi Yi Jie He Za Zhi 1991; 11:758-60, 732. [PMID: 1687966] [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: 12/28/2022]
|
23
|
Selassie CD, Li RL, Poe M, Hansch C. On the optimization of hydrophobic and hydrophilic substituent interactions of 2,4-diamino-5-(substituted-benzyl)pyrimidines with dihydrofolate reductase. J Med Chem 1991; 34:46-54. [PMID: 1899453 DOI: 10.1021/jm00105a008] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [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: 12/29/2022]
Abstract
The inhibition constants (Kiapp) were obtained from the action of 68 2,4-diamino-5-(substituted-benzyl)pyrimidines on dihydrofolate reductase from an Escherichia coli strain MB 1428. Subsequently, these results were used to formulate appropriate quantitative structure-activity relationships (QSAR). Once again these equations emphasize the paramount importance of steric/dispersion factors in enhancing antibacterial potency. Hydrophobicity also plays a role, albeit a minor one. Comparisons with the QSAR obtained versus prokaryotic dihydrofolate reductase (DHFR) demonstrate subtle differences in binding behavior between meta and para substituents which may be effectively maximized in the design of more efficacious and selective antibacterial agents. The bacterial and avian QSAR equations can be used to calculate selectivity indices for trimethoprim, tetroxoprim, and two other specially designed 2,4-diamino-5-(substituted-benzyl)pyrimidines.
Collapse
Affiliation(s)
- C D Selassie
- Department of Chemistry, Pomona College, Claremont, California 91711
| | | | | | | |
Collapse
|
24
|
Affiliation(s)
- J Wang
- Department of Chemistry, New Mexico State University, Las Cruces 88003
| | | |
Collapse
|
25
|
Selassie CD, Fang ZX, Li RL, Hansch C, Debnath G, Klein TE, Langridge R, Kaufman BT. On the structure selectivity problem in drug design. A comparative study of benzylpyrimidine inhibition of vertebrate and bacterial dihydrofolate reductase via molecular graphics and quantitative structure-activity relationships. J Med Chem 1989; 32:1895-905. [PMID: 2502631 DOI: 10.1021/jm00128a035] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Quantitative structure-activity relationships (QSAR) have been derived for the action of 68 5-(substituted benzyl)-2,4-diaminopyrimidines on dihydrofolate reductase (DHFR) from Lactobacillus casei and chicken liver. The QSAR are analyzed with respect to the stereographics models of the active sites of the enzymes and found to be in good agreement. Using these QSAR equations, we have attempted to design new trimethoprim-type antifolates having higher selectivity for the bacterial enzyme. The general problem of developing selective inhibitors is discussed.
Collapse
Affiliation(s)
- C D Selassie
- Department of Chemistry, Pomona College, Claremont, California 91711
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Wang J, Golden T, Li RL. Cobalt phthalocyanine/cellulose acetate chemically modified electrodes for electrochemical detection in flowing streams. Multifunctional operation based upon the coupling of electrocatalysis and permselectivity. Anal Chem 1988; 60:1642-5. [PMID: 3223577 DOI: 10.1021/ac00166a038] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
27
|
Li RL. [Advances in research on the serodiagnosis of candidiasis]. Zhonghua Liu Xing Bing Xue Za Zhi 1988; 9:116-9. [PMID: 3044603] [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: 01/03/2023]
|
28
|
Li RL, Poe M. Quantitative structure-activity relationships for the inhibition of Escherichia coli dihydrofolate reductase by 5-(substituted benzyl)-2,4-diaminopyrimidines. J Med Chem 1988; 31:366-70. [PMID: 3276891 DOI: 10.1021/jm00397a017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [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: 01/05/2023]
Abstract
Quantitative structure-activity relationships for the inhibition of Escherichia coli (MB 1428) dihydrofolate reductase (DHFR) by 61 5-(substituted benzyl)-2,4-diaminopyrimidines are reported and analyzed. The 61 compounds include 17 congeners whose activities have not been previously reported, five of which have a 5'-substituent larger than a methoxy group. The correlation equations indicated that the molar refractivity (MR) values of the 5'-substituent, just as with the 3'- and 4'-substituents, contributed maximally at the value of 0.79 with no increment of binding for compounds with MR larger than 0.79 (which corresponds to a 5'-methoxy substitution). This experimental result is in agreement with the crystal structure of the Escherichia coli DHFR-trimethoprim complex, which shows a reasonably large trimethoprim-binding site. The inhibition of E. coli (MB 1428) DHFR by nine of the 17 new benzylpyrimidines is at lower concentrations than for trimethoprim. However, all 17 are much less potent than trimethoprim in inhibition of growth of E. coli (1515).
Collapse
Affiliation(s)
- R L Li
- Department of Medicinal Chemistry, Beijing Medical University, China
| | | |
Collapse
|
29
|
Fang ZX, Li RL, Jiang YM, Gao JN. [The synthesis of the dihydrofolate reductase inhibitors 2,4-diamino-5-substituted-benzylpyrimidines and their inhibition on L. casei DHFR and chicken liver DHFR]. Yao Xue Xue Bao 1988; 23:108-14. [PMID: 3188916] [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: 01/04/2023]
|
30
|
Li YS, Zhang TD, Li CW, Zhao XL, Wei ZR, Tan W, Li RL, Ma YY. [Traditional Chinese and Western medicine in the treatment of 27 patients with malignant lymphoma]. Zhonghua Zhong Liu Za Zhi 1988; 10:61-2. [PMID: 3416701] [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: 01/05/2023]
Abstract
Twenty-seven patients with malignant lymphoma (14 Hodgkin's disease, 9 histiocytosarcoma, 2 plasmacytoma, 2 lympholeucosarcoma) were treated by Ailin-injection plus Chinese herbal medicine. The latter's composition and dose varied depending on the clinical manifestations. All the patients had stage III and IV lesions. The total remission rate was 70.37% (complete remission 13 patients, partial remission 6 patients, no remission 8 patients). In addition, we also studied the suppressive effect of Ailin on transplanted tumor in vivo (S-180). The suppression rates were 36.09%, 48.80%, 32.67% by three repetitions with an average of 39.18% (P less than 0.002). They were 37.25%, 35.29% on S37 with an average of 36.27% (P less than 0.005). They were 46.53%, 44.56%, 51.35%, 45.95% on Ehrlich ascites tumor cells with an average of 47.09% (P less than 0.001). The clinical and experimental studies suggest that Ailin-1 has no serious side effects and is well tolerated by patients with malignant lymphoma at moderate or advanced stages. No toxic reactions were observed at the clinical dose. In the above combination therapy, the Chinese herbal medicine has obvious supplementary effect in the treatment of the patients' cachexia and immuno-suppression.
Collapse
Affiliation(s)
- Y S Li
- Haerbin University of Medical Sciences
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Zhao WZ, Yan B, Li RL. [Synthesis and antibacterial activity of 2,4-diamino-5-(substituted anilino) pyrimidines]. Yao Xue Xue Bao 1987; 22:541-4. [PMID: 3450155] [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: 01/05/2023]
|
32
|
Li RL, Zhang WS, Wang JC, Poe M. [Structure-activity relationships of the inhibition of Escherichia coli dihydrofolate reductase (MB1428) by 5-(substituted phenyl) thio and 5-(substituted phenyl) seleno-2,4-diaminopyrimidines]. Yao Xue Xue Bao 1987; 22:233-7. [PMID: 3310518] [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: 01/05/2023]
|
33
|
Zhang WS, Li RL, Wang QJ. [Studies on the synthesis of dihydrofolate reductase inhibitor, 5-(substituted phenyl)-thio(seleno)-2, 4-diaminopyrimidines and their inhibitory activity on L. casei and chicken liver DHFR]. Yao Xue Xue Bao 1987; 22:136-40. [PMID: 3113176] [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: 01/04/2023]
|
34
|
Fang ZX, Li RL, Qian Y, Liang HL. [Quantitative structure-activity relationships of the inhibition of Escherichia coli bacteria (1515) by 5-(substituted-benzyl)-2,4-diaminopyrimidines]. Yao Xue Xue Bao 1987; 22:23-7. [PMID: 3300163] [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: 01/05/2023]
|
35
|
Li RL, Fang ZX. [Investigation of the selectivity of the dihydrofolate reductase inhibitor 5-substituted benzyl-2,4-diamino-pyrimidines]. Yao Xue Xue Bao 1986; 21:753-60. [PMID: 3577775] [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: 01/06/2023]
|
36
|
Li RL, Wang SY. [Quantitative structure-anticonvulsant activity relationships of cinnamamides]. Yao Xue Xue Bao 1986; 21:580-5. [PMID: 3811951] [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: 01/07/2023]
|
37
|
Wang SY, Li RL, Liu WQ, Wang GQ, Liu P, Song JM, Pei YQ, Yao HY, Gao XM. [Structure-anticonvulsant activity relationships of some cinnamamides of substituted aromatic ring]. Yao Xue Xue Bao 1986; 21:542-5. [PMID: 3811946] [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: 01/07/2023]
|
38
|
Selassie CD, Fang ZX, Li RL, Hansch C, Klein T, Langridge R, Kaufman BT. Inhibition of chicken liver dihydrofolate reductase by 5-(substituted benzyl)-2,4-diaminopyrimidines. A quantitative structure-activity relationship and graphics analysis. J Med Chem 1986; 29:621-6. [PMID: 3701780 DOI: 10.1021/jm00155a006] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The inhibition of chicken liver dihydrofolate reductase by a series of substituted benzylpyrimidines has been investigated. From the inhibition constants a quantitative structure-activity relationship has been formulated. This mathematical model is compared with molecular graphics models constructed from the X-ray crystallographic coordinates of trimethoprim and 5-(3,4-dimethoxy-4-isopropenylbenzyl)-2,4- diaminopyrimidine bound to the enzyme. There is good correspondence between the two types of models.
Collapse
|
39
|
Gu ZP, Wang WC, Qi LM, Shen PJ, Zhao SX, Li RL. Antifertility effects of 2 alpha, 17 alpha-diethynyl, A-nor-androstane, 2 beta, 17 beta-dihydroxy, 2 beta-semisuccinate (AF-57). Zhongguo Yao Li Xue Bao 1985; 6:121-4. [PMID: 2934945] [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: 01/03/2023]
|
40
|
Lien EJ, Guo ZR, Li RL, Su CT. Use of dipole moment as a parameter in drug-receptor interaction and quantitative structure-activity relationship studies. J Pharm Sci 1982; 71:641-55. [PMID: 7097526 DOI: 10.1002/jps.2600710611] [Citation(s) in RCA: 96] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
41
|
Wang J, Bao YF, Xiong GH, Jin CF, Guang LR, Qu JQ, Li RL, Zhang JQ, Jiang YL. [Mebendazole in the experimental treatment of cysticercosis]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1981; 3 Suppl 1:63-5. [PMID: 6459882] [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: 01/20/2023]
|
42
|
Li RL, Dietrich SW, Hansch C. Quantitative structure-selectivity relationships. Comparison of the inhibition of Escherichia coli and bovine liver dihydrofolate reductase by 5-(substituted-benzyl)-2,4-diaminopyrimidines. J Med Chem 1981; 24:538-44. [PMID: 7017146 DOI: 10.1021/jm00137a012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In our previous publication (Blaney, J. M.; Dietrich, S. W.; Reynolds, M. A.; Hansch, C. J. Med. Chem. 1979, 22, 614), correlation equations were presented for the inhibition of bovine liver and Escherichia coli dihydrofolate reductase (DHFR) by 5-(substituted benzyl)-2,4-diaminopyrimidines. These equations brought out differences in the way these two enzymes interact with substituents, which explain the high selectivity of drugs like trimethoprim. We have tested and further developed these equations in this report. It is of particular interest that our previously published correlation equation for E. coli DHFR accurately predicted the potency of a commercial competitor of trimethoprim (tetroxoprim) now in clinical use. We believe that new and effective competitors for trimethoprim can be designed by means of the two correlation equations.
Collapse
|