1
|
Liu HX, Yao WY, Cui G, Zhou J, Yan H, Guo H, Wang YW, Zhang Y. Design, synthesis, and antibacterial activity of pleuromutilin derivatives. Chem Biol Drug Des 2024; 103:e14554. [PMID: 38806405 DOI: 10.1111/cbdd.14554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/25/2024] [Accepted: 05/07/2024] [Indexed: 05/30/2024]
Abstract
This paper reports the design, synthesis, and antibacterial activity study of pleuromutilin derivatives with 2-methyl-4-nitroaniline and 2-methoxy-4-nitroaniline side chains at the C22 position. The structures of the new compounds were characterized by 1H-NMR, 13C-NMR and HRMS. The inhibitory activity of the compounds against MSSA, pyogeniccoccus, streptococcus, and MRSA strains was determined using the micro broth dilution method. The results showed that the compounds exhibited certain activity against Gram-positive bacteria, among which compounds A8a, A8b, A8c, A8d, and A7 demonstrated superior antibacterial activity against MSSA, MRSA, and pyogeniccoccus compared to tiamulin, although the derivatives showed lower antibacterial activity against streptococcus compared to the control drug. Based on the favorable in vitro activity of A8c, the time-kill kinetics against MRSA were evaluated, revealing that compound A8c could inhibit bacterial proliferation in a concentration-dependent manner.
Collapse
Affiliation(s)
- Hui-Xian Liu
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, PR China
| | - Wen-Yu Yao
- Jinan University College of Pharmacy, Guangzhou, PR China
| | - Ge Cui
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, PR China
| | - Jing Zhou
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, PR China
| | - Hao Yan
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, PR China
| | - Hui Guo
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, PR China
| | - Yu-Wei Wang
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, PR China
| | - Yue Zhang
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, PR China
- Hebei Research Center of Pharmaceutical and Chemical Engineering, Shijiazhuang, PR China
- Hebei Province Key Laboratory of Molecular Chemistry for Drug, Shijiazhuang, PR China
| |
Collapse
|
2
|
Suzuki K, Kaneko F, Matsushita A, Hata E. Outbreaks of bovine mastitis caused by specific Mycoplasma bovis strains recurring at multi-year intervals. J Vet Diagn Invest 2024; 36:457-462. [PMID: 38362635 PMCID: PMC11110772 DOI: 10.1177/10406387241230939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024] Open
Abstract
Mycoplasma bovis is a major cause of bovine mastitis. Intermittent shedding of the organism for many months is a feature of cows with intramammary infection. A dairy farm in Japan experienced a mastitis outbreak caused by M. bovis in 2016, as well as 2 additional outbreaks and 1 case in 2020-2021. The causative strains in the 3 outbreaks shared a common and identical genetic feature, the insertion of a transposase gene at the same site within the phosphate acetyltransferase-2 gene. Additionally, all isolates were genotyped to closely related sequence types (ST21 and ST141) by multilocus sequence typing, and had similar pulsopatterns by pulsed-field gel electrophoresis. Our results indicate that infection with the same causative strain remained in this herd and environment for 4 y. Treatment with fluoroquinolones, guided by antimicrobial susceptibility test results, eliminated M. bovis from 16 of 20 M. bovis-infected cows, as confirmed by culture and somatic cell counts. However, mastitis caused by other bacteria occurred in 9 M. bovis-free cows within 2 mo of the last treatment.
Collapse
Affiliation(s)
- Kenta Suzuki
- Matsumoto Livestock Hygiene Service Center, Matsumoto, Nagano, Japan
| | - Fumihiro Kaneko
- Natural Environment Division, Gunma Prefectural Governmental Office, Maebashi, Gunma, Japan
| | - Aya Matsushita
- Matsumoto Livestock Hygiene Service Center, Matsumoto, Nagano, Japan
| | - Eiji Hata
- National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| |
Collapse
|
3
|
Corrales JC, Sánchez A, Hernández X, Amores-Iniesta J, Esnal A, de la Fe C. A Set of Multiresistant Isolates of Mycoplasma bovis Subtype ST-1 with a Variable Susceptibility to Quinolones Are Also Circulating in Spain. Pathogens 2024; 13:329. [PMID: 38668284 PMCID: PMC11053527 DOI: 10.3390/pathogens13040329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/05/2024] [Accepted: 04/11/2024] [Indexed: 04/29/2024] Open
Abstract
Mycoplasma bovis (M. bovis) is one of the worldwide most important infectious agents involved in respiratory complex diseases (RCD). In Spain, the endemic presence of subtypes ST-2 and ST-3 with phenotypic differences linked to their susceptibility to fluoroquinolones opened the way to develop control strategies focused on previous diagnosis of the subtype and the use of directed therapies when M. bovis were involved in RCD. Surprisingly, microbiological studies conducted during 2023 evidenced for the first time the presence of Spanish isolates of a new polC-subtype, previously classified as ST-1, recovered from calves with respiratory symptoms and pneumonia in different areas of the country (n = 16). Curiously, the minimum inhibitory concentration (MIC) to a panel of antimicrobials revealed phenotypic differences between these ST-1 isolates when using fluoroquinolones (FLQ). There is no geographical correlation between MIC profiles even for a set of 8 isolates recovered from different animals in the same flock. Sequencing of 4 genes (gyrA, gyrB, parC and parE) encoding quinolone resistance-determining regions (QRDR) evidenced the presence of accumulate mutations in 2 ST-1 isolates with high FLQ MICs, but not in all them (n = 3), thus suggesting that, as previously recorded for ST-2 isolates, other mechanisms should be involved in the acquisition of resistence to these antimicrobials. Additionally, as previously detected in the Spanish ST-2 and ST-3, subtype ST-1 isolates are also resistant to macrolides or lincosamides.
Collapse
Affiliation(s)
- Juan Carlos Corrales
- Ruminant Health Research Group, Department of Animal Health, Faculty of Veterinary Sciences, University of Murcia, 30100 Murcia, Spain; (J.C.C.); (A.S.); (X.H.); (J.A.-I.)
| | - Antonio Sánchez
- Ruminant Health Research Group, Department of Animal Health, Faculty of Veterinary Sciences, University of Murcia, 30100 Murcia, Spain; (J.C.C.); (A.S.); (X.H.); (J.A.-I.)
| | - Xóchitl Hernández
- Ruminant Health Research Group, Department of Animal Health, Faculty of Veterinary Sciences, University of Murcia, 30100 Murcia, Spain; (J.C.C.); (A.S.); (X.H.); (J.A.-I.)
| | - Joaquín Amores-Iniesta
- Ruminant Health Research Group, Department of Animal Health, Faculty of Veterinary Sciences, University of Murcia, 30100 Murcia, Spain; (J.C.C.); (A.S.); (X.H.); (J.A.-I.)
| | - Antón Esnal
- Analítica Veterinaria, 48100 Mungía, Vasque Country, Spain;
| | - Christian de la Fe
- Ruminant Health Research Group, Department of Animal Health, Faculty of Veterinary Sciences, University of Murcia, 30100 Murcia, Spain; (J.C.C.); (A.S.); (X.H.); (J.A.-I.)
| |
Collapse
|
4
|
Liu Q, Zhang H, Yi Y, Wang P, Pu W, Wang S, Shang R. Synthesis and evaluation of novel pleuromutilin derivatives targeting the 50S ribosomal subunit for antibacterial ability. Eur J Med Chem 2023; 262:115882. [PMID: 37879170 DOI: 10.1016/j.ejmech.2023.115882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/23/2023] [Accepted: 10/13/2023] [Indexed: 10/27/2023]
Abstract
Multidrug-resistant bacteria, particularly methicillin-resistant Staphylococcus aureus, have become a major global public health concern. Therefore, developing new antibiotics that do not possess cross-resistance for the currently available antibiotics is critical. Herein, we synthesized a novel class of pleuromutilin derivatives containing substituted triazine with improved antibacterial activity. Among these derivatives, 6d, which contains 4-dimethylamino-1,3,5-triazine in the side chain of pleuromutilin, exhibited highly promising antimicrobial activity and mitigated antibiotic resistance. The high antibacterial potency of 6d was further supported by docking model analysis and green fluorescent protein inhibition assay. Additionally, cytotoxicity and acute oral toxicity evaluation and in vivo mouse systemic infection experiments revealed that 6d possessed tolerable toxicity and promising therapeutic efficacy.
Collapse
Affiliation(s)
- Qinqin Liu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Hongjuan Zhang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - YunPeng Yi
- Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Institute of Poultry Science, Shandong Academy of Agricultural Science, 202 Gongyebeilu, Jinan, 250023, Shandong, China
| | - Panpan Wang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Wanxia Pu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Shengyi Wang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| |
Collapse
|
5
|
Zhou Y, Yi Y, Yang J, Zhang H, Liu Q, Wang S, Pu W, Shang R. Anti-methicillin-resistant Staphylococcus aureus activity and safety evaluation of 14-O-[(5-ethoxycarbonyl-4,6-dimethylpyrimidine-2-yl) thioacetyl] mutilin (EDT). Sci Rep 2023; 13:15267. [PMID: 37709940 PMCID: PMC10502144 DOI: 10.1038/s41598-023-42621-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/12/2023] [Indexed: 09/16/2023] Open
Abstract
Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) have threated the public health worldwide, which emphasizes the urgent need for new drugs with novel mechanism of actions. 14-O-[(5-ethoxycarbonyl-4,6-dimethylpyrimidine-2-yl) thioacetyl] mutilin (EDT) is a pleuromutilin compound with high activity against several Gram-positive bacteria in vitro and in vivo. This study aimed to verifying the potential anti-MRSA activity and evaluating the safety of EDT. In in vitro antibacterial activity assays, EDT exhibited potent antibacterial activity against MRSA isolated from clinic (minimum inhibitory concentration = 0.0313-0.125 μg/mL), increased post-antibiotic effect (PAE) values and limited potential for the development of resistance. Docking model and green fluorescent protein (GFP) inhibition assay further elucidated the higher antibacterial activities of EDT via mechanism of action. In safety evaluation, EDT exhibited low cytotoxic effect and acute oral toxicity in mice and avoided to significantly increase the number of revertant colonies of six tested strains in the Ames study. Furthermore, EDT displayed a moderate inhibitory effect on CYP3A4 and moderate stability in mouse and human liver microsomes, providing a promising agent for the development of new antimicrobial candidate.
Collapse
Affiliation(s)
- Yuhang Zhou
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Yunpeng Yi
- Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan, 250023, People's Republic of China
| | - Jing Yang
- Gansu Analysis and Research Center, Lanzhou, 730000, People's Republic of China
| | - Hongjuan Zhang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Qinqin Liu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Shengyi Wang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Wanxia Pu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China.
| |
Collapse
|
6
|
Zhou Y, Yi Y, Wang J, Yang Z, Liu Q, Pu W, Shang R. Discovery of novel pleuromutilin derivatives as potent antibacterial agents. Eur J Med Chem 2022; 237:114403. [PMID: 35472849 DOI: 10.1016/j.ejmech.2022.114403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/22/2022]
Abstract
Novel pleuromutilin derivatives with 3,4-dihydropyrimidin and pyrimidine moieties were designed, synthesized, and evaluated for their antibacterial activities. Most of the synthesized derivatives, especially the compounds bearing the pyrimidine moieties, exhibited potent antibacterial activities against methicillin-resistant Staphylococcus aureus BNCC 337371 (MRSA-337371), Staphylococcus aureus ATCC 25923 (S. aureus-25923) and methicillin-resistant Staphylococcus epidermidis ATCC 51625 (MRSE-51625). Compounds 5a, 5g and 5h exerted the excellent antibacterial activities and selected to evaluate their bacterial killing kinetics. Compound 5h displayed the highest antibacterial activities with bacteriostatic activities against MRSA and further evaluated its efficacy in mouse systemic infection. The results showed that compound 5h exhibited potent in vivo antibacterial effects to significantly improve the survival rate of mice (ED50 = 16.14 mg/kg), reduce the bacterial load and alleviate the pathological changes in the lungs of the affected mice. Furthermore, molecular docking studies revealed that the selected compounds successfully localized in the pocket of 50S ribosomal subunit and the formed hydrogen bonds were the main interaction.
Collapse
Affiliation(s)
- Yuhang Zhou
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Yunpeng Yi
- Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Institute of Poultry Science, Shandong Academy of Agricultural Science, 202 Gongyebeilu Jinan, 250023, Shandong, China.
| | - Jiangkun Wang
- School of Basic Medical Sciences, Lanzhou University, 730000, Lanzhou, China
| | - Zheng Yang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Qinqin Liu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Wanxia Pu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| |
Collapse
|
7
|
Zhang FL, Feng T. Diterpenes Specially Produced by Fungi: Structures, Biological Activities, and Biosynthesis (2010–2020). J Fungi (Basel) 2022; 8:jof8030244. [PMID: 35330246 PMCID: PMC8951520 DOI: 10.3390/jof8030244] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/25/2022] [Accepted: 02/27/2022] [Indexed: 12/11/2022] Open
Abstract
Fungi have traditionally been a very rewarding source of biologically active natural products, while diterpenoids from fungi, such as the cyathane-type diterpenoids from Cyathus and Hericium sp., the fusicoccane-type diterpenoids from Fusicoccum and Alternaria sp., the guanacastane-type diterpenoids from Coprinus and Cercospora sp., and the harziene-type diterpenoids from Trichoderma sp., often represent unique carbon skeletons as well as diverse biological functions. The abundances of novel skeletons, biological activities, and biosynthetic pathways present new opportunities for drug discovery, genome mining, and enzymology. In addition, diterpenoids peculiar to fungi also reveal the possibility of differing biological evolution, although they have similar biosynthetic pathways. In this review, we provide an overview about the structures, biological activities, evolution, organic synthesis, and biosynthesis of diterpenoids that have been specially produced by fungi from 2010 to 2020. We hope this review provides timely illumination and beneficial guidance for future research works of scholars who are interested in this area.
Collapse
|
8
|
Fan Y, Fu Y, Zhou Y, Liu Y, Hao B, Shang R. Acute, subacute oral toxicity and Ames test of Py-mulin: an antibacterial drug candidate. BMC Pharmacol Toxicol 2022; 23:2. [PMID: 34983673 PMCID: PMC8725322 DOI: 10.1186/s40360-021-00543-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 12/17/2021] [Indexed: 11/12/2022] Open
Abstract
Background Py-mulin is a new pleuromutilin derivative with potent antibacterial activities in vitro and in vivo, suggesting this compound may lead to a promising antibacterial drug after further development. The present study is aimed to evaluate the acute and subacute oral toxicity, and the genotoxicity with the standard Ames test according to standard protocols. Methods Acute oral toxicity of Py-mulin was determined using Kunming mice. The 28-day repeated dose oral toxicity study in SD rats was performed according to OECD guideline No. 407. The bacterial reverse mutation (Ames test) was carried out using four Salmonella typhimurium (S. typhimurium) strains TA97, TA98, TA100 and TA1535 with and without S9 metabolic activation. Results The LD50 values in acute oral toxicity were 2973 mg/kg (female mice) and 3891 mg/kg (male mice) calculated by the Bliss method. In subacute toxicity study, 50 mg/kg Py-mulin did not induce any abnormality in body weight, food consumption, clinical sign, hematology, clinical chemistry, organ weight, and histopathology in all of the treatment groups. However, high doses of Py-mulin (100 and 300 mg/kg) displayed slightly hepatotoxicity to female rats. Furthermore, Py-mulin did not significantly increase the number of revertant colonies of four standard S. typhimurium strains with the doses of 0.16–1000 μg/plate in the Ames study. Conclusions Based on our findings, our study provides some information for the safety profile of Py-mulin.
Collapse
Affiliation(s)
- Yuan Fan
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Yunxing Fu
- Zhengzhou Key Laboratory of Immunopharmacology of effective components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, 450046, Zhengzhou, People's Republic of China
| | - Yuhang Zhou
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Yu Liu
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Baocheng Hao
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province/Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs/Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agriculture Sciences, No. 335, Qilihe District, Lanzhou, 730050, People's Republic of China.
| |
Collapse
|
9
|
Enhanced Pathogenesis Caused by Influenza D Virus and Mycoplasma bovis Coinfection in Calves: a Disease Severity Linked with Overexpression of IFN-γ as a Key Player of the Enhanced Innate Immune Response in Lungs. Microbiol Spectr 2021; 9:e0169021. [PMID: 34937196 PMCID: PMC8694133 DOI: 10.1128/spectrum.01690-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Bovine respiratory disease (BRD) is a major disease of young cattle whose etiology lies in complex interactions between pathogens and environmental and host factors. Despite a high frequency of codetection of respiratory pathogens in BRD, data on the molecular mechanisms and pathogenesis associated with viral and bacterial interactions are still limited. In this study, we investigated the effects of a coinfection with influenza D virus (IDV) and Mycoplasma bovis in cattle. Naive calves were infected by aerosol with a French IDV strain and an M. bovis strain. The combined infection shortened the incubation period, worsened the disease, and led to more severe macroscopic and microscopic lesions compared to these parameters in calves infected with only one pathogen. In addition, IDV promoted colonization of the lower respiratory tract (LRT) by M. bovis and increased white cell recruitment to the airway lumen. The transcriptomic analysis highlighted an upregulation of immune genes in the lungs of coinfected calves. The gamma interferon (IFN-γ) gene was shown to be the gene most statistically overexpressed after coinfection at 2 days postinfection (dpi) and at least until 7 dpi, which correlated with the high level of lymphocytes in the LRT. Downregulation of the PACE4 and TMPRSS2 endoprotease genes was also highlighted, being a possible reason for the faster clearance of IDV in the lungs of coinfected animals. Taken together, our coinfection model with two respiratory pathogens that when present alone induce moderate clinical signs of disease was shown to increase the severity of the disease in young cattle and a strong transcriptomic innate immune response in the LRT, especially for IFN-γ. IMPORTANCE Bovine respiratory disease (BRD) is among the most prevalent diseases in young cattle. BRD is due to complex interactions between viruses and/or bacteria, most of which have a moderate individual pathogenicity. In this study, we showed that coinfection with influenza D virus (IDV) and Mycoplasma bovis increased the severity of the respiratory disease in calves in comparison with IDV or M. bovis infection. IDV promoted M. bovis colonization of the lower respiratory tract and increased white cell recruitment to the airway lumen. The transcriptomic analysis highlighted an upregulation of immune genes in the lungs of coinfected calves. The IFN-γ gene in particular was highly overexpressed after coinfection, correlated with the disease severity, immune response, and white cell recruitment in the lungs. In conclusion, we showed that IDV facilitates coinfections within the BRD complex by modulating the local innate immune response, providing new insights into the mechanisms involved in severe respiratory diseases.
Collapse
|
10
|
Pancza B, Szathmáry M, Gyurján I, Bánkuti B, Tudós Z, Szathmary S, Stipkovits L, Sipos-Kozma Z, Ásványi B, Varga L, Szenthe K, Bánáti F. A rapid and efficient DNA isolation method for qPCR-based detection of pathogenic and spoilage bacteria in milk. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
11
|
Fu Y, Leng C, Fan Y, Ma X, Li X, Wang X, Guo Z, Wang X, Shang R. In Vitro and In Vivo Activity of 14- O-[(4,6-Diamino-pyrimidine-2-yl) thioacetyl] Mutilin against Methicillin-Resistant Staphylococcus aureus. Molecules 2021; 26:3277. [PMID: 34071703 PMCID: PMC8199141 DOI: 10.3390/molecules26113277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/13/2021] [Accepted: 05/20/2021] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus aureus (S. aureus) is a major human pathogen that requires new antibiotics with unique mechanism. A new pleuromutilin derivative, 14-O-[(4,6-Diamino-pyrimidine-2-yl) thioacetyl] mutilin (DPTM), has been synthesized and proved as a potent antibacterial agent using in vitro and in vivo assays. In the present study, DPTM was further in vitro evaluated against methicillin-resistant Staphylococcus aureus (MRSA) isolated from dairy farms and outperformed tiamulin fumarate, a pleuromutilin drug used for veterinary. Moreover, a murine skin wound model caused by MRSA infection was established, and the healing effect of DPTM was investigated. The results showed that DPTM could promote the healing of MRSA skin infection, reduce the bacterial burden of infected skin MRSA and decrease the secretion of IL-6 and TNF-α inflammatory cytokines in plasma. These results provided the basis for further in-depth drug targeted studies of DPTM as a novel antibacterial agent.
Collapse
Affiliation(s)
- Yunxing Fu
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Chunqing Leng
- Department of Animal Production, Jinhua Polytechnic, Jinhua 321000, China;
| | - Yuan Fan
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China;
| | - Xia Ma
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Xianghui Li
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Xuefei Wang
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Zhenghuan Guo
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Xiujun Wang
- Zhengzhou Key Laboratory of Immunopharmacology of Effective Components of Chinese Veterinary Medicine, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China; (Y.F.); (X.M.); (X.L.); (X.W.); (Z.G.)
- Henan Provincial Research Center for the Inheritance and Innovation of Chinese Veterinary Medicine Classic Prescriptions, College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China
| | - Ruofeng Shang
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China;
| |
Collapse
|
12
|
A Cas9-transcription factor fusion protein enhances homology-directed repair efficiency. J Biol Chem 2021; 296:100525. [PMID: 33689695 PMCID: PMC8042446 DOI: 10.1016/j.jbc.2021.100525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 11/22/2022] Open
Abstract
Precise gene insertion or replacement in cells and animals that requires incorporation of a foreign DNA template into the genome target site by homology-directed repair (HDR) remains an inefficient process. One of the limiting factors for the inefficiency of HDR lies in the limited chance for colocalization of the donor template and target in the huge genome space. We here present a strategy to enhance HDR efficiency in animal cells by spatial and temporal colocalization of the donor and Cas9 by coupling the CRISPR system with a transcription factor (TF). We first identified that THAP domain-containing 11 (THAP11) can coordinate with CRISPR/Cas9 to increase HDR stably through screening multiple TFs from different species. We next designed donor structures with different fusion patterns with TF-specific DNA-binding motifs and found that appending two copies of THAP11-specific DNA binding motifs to both ends of the double-stranded donor DNA has an optimal effect to promote HDR. The THAP11-fused CRISPR system achieved more than twofold increase in HDR-mediated knock-in efficiency for enhanced green fluorescent protein (EGFP) tagging of endogenous genes in 293T cells. We also demonstrated up to 6-fold increases of knock-in through the combinational use of the TF-fused CRISPR and valnemulin, a recently discovered small-molecule HDR enhancer. This modified CRISPR system provides a simple but highly efficient platform to facilitate CRISPR-mediated KI manipulations.
Collapse
|
13
|
Bokma J, Gille L, De Bleecker K, Callens J, Haesebrouck F, Pardon B, Boyen F. Antimicrobial Susceptibility of Mycoplasma bovis Isolates from Veal, Dairy and Beef Herds. Antibiotics (Basel) 2020; 9:antibiotics9120882. [PMID: 33316982 PMCID: PMC7764132 DOI: 10.3390/antibiotics9120882] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 01/28/2023] Open
Abstract
Mycoplasma bovis is an important pathogen causing mostly pneumonia in calves and mastitis in dairy cattle. In the absence of an effective vaccine, antimicrobial therapy remains the main control measure. Antimicrobial use in veal calves is substantially higher than in conventional herds, but whether veal calves also harbor more resistant M. bovis strains is currently unknown. Therefore, we compared antimicrobial susceptibility test results of M. bovis isolates from different cattle sectors and genomic clusters. The minimum inhibitory concentration of nine antimicrobials was determined for 141 Belgian M. bovis isolates (29 dairy, 69 beef, 12 mixed, 31 veal farms), and was used to estimate the epidemiological cut-off. Acquired resistance was frequently observed for the macrolides, while no acquired resistance to oxytetracycline and doxycycline, minimal acquired resistance to florfenicol and tiamulin, and a limited acquired resistance to enrofloxacin was seen. M. bovis isolates from beef cattle or genomic cluster III had higher odds of being gamithromycin-resistant than those from dairy cattle or genomic clusters IV and V. In this study, no cattle industry could be identified as source of resistant M. bovis strains. A single guideline for antimicrobial use for M. bovis infections, with a small remark for gamithromycin, is likely sufficient.
Collapse
Affiliation(s)
- Jade Bokma
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (L.G.); (B.P.)
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (F.H.); (F.B.)
- Correspondence:
| | - Linde Gille
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (L.G.); (B.P.)
| | - Koen De Bleecker
- Animal Health Service-Flanders, Industrielaan 29, 8820 Torhout, Belgium; (K.D.B.); (J.C.)
| | - Jozefien Callens
- Animal Health Service-Flanders, Industrielaan 29, 8820 Torhout, Belgium; (K.D.B.); (J.C.)
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (F.H.); (F.B.)
| | - Bart Pardon
- Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (L.G.); (B.P.)
| | - Filip Boyen
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (F.H.); (F.B.)
| |
Collapse
|
14
|
Fan Y, Liu Y, Wang H, Shi T, Cheng F, Hao B, Yi Y, Shang R. Novel pleuromutilin derivatives with substituted 6-methylpyrimidine: Design, synthesis and antibacterial evaluation. Eur J Med Chem 2020; 207:112735. [PMID: 32827940 DOI: 10.1016/j.ejmech.2020.112735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/15/2020] [Accepted: 08/05/2020] [Indexed: 10/23/2022]
Abstract
A series of novel pleuromutilin derivatives with substituted 6-methylpyrimidine moieties was designed, synthesized, and evaluated for their antibacterial activities. Most of the tested compounds exhibited potent antibacterial activities against Staphylococcus aureus ATCC 25923 (S. aureus-25923), methicillin-resistant Staphylococcus epidermidis ATCC 51625 (MRSE-51625), methicillin-resistant Staphylococcus aureus BNCC 337371 (MRSA-337371), Streptococcus dysgalactiae (S. dysgalactiae) and Streptococcus agalactiae (S. agalactiae). Compounds 5c and 5g were the most active and displayed bacteriostatic activities against MRSA. In vivo mouse systemic infection experiment showed that 5c significantly improved the survival rate of mice (ED50 = 18.02 mg/kg), reduced the bacterial load and alleviated the pathological changes in the lungs of the affected mice.
Collapse
Affiliation(s)
- Yuan Fan
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China.
| | - Yu Liu
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China
| | - Hao Wang
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China
| | - Tao Shi
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Feng Cheng
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China
| | - Baocheng Hao
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China.
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province, China; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, No. 335, Qilihe District, Lanzhou, 730050, China.
| |
Collapse
|
15
|
Fu Y, Yi Y, Fan Y, Shang R. Cytochrome P450 inhibition potential and initial genotoxic evaluation of 14-O-[(4,6-diaminopyrimidine-2-yl)thioacetyl] mutilin. Sci Rep 2020; 10:13474. [PMID: 32778735 PMCID: PMC7417534 DOI: 10.1038/s41598-020-70400-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 06/03/2020] [Indexed: 01/05/2023] Open
Abstract
14-O-[(4,6-Diaminopyrimidine-2-yl)thioacetyl] mutilin (DPTM) is a promising drug candidate with excellent antibacterial activity against Gram-positive bacteria. The present study was designed to characterize its Cytochrome P450 (CYP) enzymes inhibition activities and the genotoxicity with the standard Ames test. We determined the inhibitory effects of DPTM on CYP1A2, CYP2D1/6, CYP2E1, CYP2C11/9 and CYP3A/4 in rat liver microsomes (RLMs) and in human liver microsomes (HLMs). The mRNA expressions of the above CYP isoforms and their transcriptional regulators were also evaluated using the Hep G2 cell model. The results showed DPTM exhibited a moderate inhibitory potential against CYP3A/4 (IC50 values of 10 ± 2 and 8 ± 2 μM, respectively) and weak against the other CYP enzymes based on their IC50 values. Compared to the control, CYP isoforms and their transcriptional regulators mRNA expressions significantly increased when the Hep G2 cells were treated with DPTM for a certain period of time. In the Ames test, Salmonella strains TA97, TA98, TA100, TA102 and TA1535 were treated with or without the metabolic activation (S9). Analysis showed the average number of revertant colonies per plate was less in double in the groups treated with DPTM than that in the negative control plate and showed no dose-related increase.
Collapse
Affiliation(s)
- Yunxing Fu
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Qilihe District, No. 335, Lanzhou, 730050, People's Republic of China.,Henan University of Animal Husbandry and Economy, Zhengzhou, 450046, People's Republic of China
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Qilihe District, No. 335, Lanzhou, 730050, People's Republic of China
| | - Yuan Fan
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Qilihe District, No. 335, Lanzhou, 730050, People's Republic of China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Qilihe District, No. 335, Lanzhou, 730050, People's Republic of China.
| |
Collapse
|
16
|
Mycoplasma bovis in Spanish Cattle Herds: Two Groups of Multiresistant Isolates Predominate, with One Remaining Susceptible to Fluoroquinolones. Pathogens 2020; 9:pathogens9070545. [PMID: 32645913 PMCID: PMC7399988 DOI: 10.3390/pathogens9070545] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/26/2020] [Accepted: 06/30/2020] [Indexed: 11/16/2022] Open
Abstract
Mycoplasma bovis is an important bovine pathogen causing pneumonia, mastitis, and arthritis and is responsible for major economic losses worldwide. In the absence of an efficient vaccine, control of M. bovis infections mainly relies on antimicrobial treatments, but resistance is reported in an increasing number of countries. To address the situation in Spain, M. bovis was searched in 436 samples collected from beef and dairy cattle (2016–2019) and 28% were positive. Single-locus typing using polC sequences further revealed that two subtypes ST2 and ST3, circulate in Spain both in beef and dairy cattle, regardless of the regions or the clinical signs. Monitoring of ST2 and ST3 isolates minimum inhibitory concentration (MIC) to a panel of antimicrobials revealed one major difference when using fluoroquinolones (FQL): ST2 is more susceptible than ST3. Accordingly, whole-genome sequencing (WGS) further identified mutations in the gyrA and parC regions, encoding quinolone resistance-determining regions (QRDR) only in ST3 isolates. This situation shows the capacity of ST3 to accumulate mutations in QRDR and might reflect the selective pressure imposed by the extensive use of these antimicrobials. MIC values and detection of mutations by WGS also showed that most Spanish isolates are resistant to macrolides, lincosamides, and tetracyclines. Valnemulin was the only one effective, at least in vitro, against both STs.
Collapse
|
17
|
Na G, Hu X, Sun Y, Kwee S, Xing G, Xing Y, Zhang G. A highly sensitive monoclonal antibody-based paper sensor for simultaneously detecting valnemulin and tiamulin in porcine liver. J Food Sci 2020; 85:1681-1688. [PMID: 32418205 DOI: 10.1111/1750-3841.15136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/20/2020] [Accepted: 03/28/2020] [Indexed: 11/30/2022]
Abstract
Valnemulin (VAL) and tiamulin (TIA) are pleuromutilin antibiotics used primarily for treating bacterial infections in swine or other food animals. Furthermore, VAL and TIA are also employed as feed additives to promote animal growth. However, the illegal use of VAL and TIA could cause a series of hazards to consumers. Here, VAL was designed to be conjugated with bovine serum protein to prepare immunogen. A highly sensitive monoclonal antibody that recognized both VAL and TIA has been successfully produced. Moreover, an immunochromatographic strip assay for rapidly screening VAL and TIA in porcine liver was established with visual detection limits (cutoff values) of 50 and 25 ng/g, respectively. The IC50 values calculated from the equation of the standard curve were 6.06 and 3.45 ng/g and the limits of detection were 0.96 and 0.29 ng/g for VAL and TIA. According to the recovery experiment results, the test strip exhibited acceptable accuracy and precision. Generally, the proposed strip provided a practical tool for the detection of VAL and TIA. PRACTICAL APPLICATION: We produced a highly sensitive monoclonal antibody and developed an immunoassay strip for simultaneously monitoring TIA and VAL. Additionally it was preliminarily confirmed that the rapid detection tool was suitable for screening TIA and VAL in porcine liver.
Collapse
Affiliation(s)
- Guanqiong Na
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Xiaofei Hu
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yaning Sun
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Sharon Kwee
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, U.S.A
| | - Guangxu Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yunrui Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China
| |
Collapse
|
18
|
Li YG, Wang JX, Zhang GN, Zhu M, You XF, Wang YC, Zhang F. Design, synthesis, and biological activity evaluation of a series of pleuromutilin derivatives with novel C14 side chains. Bioorg Med Chem Lett 2020; 30:126969. [PMID: 32014384 DOI: 10.1016/j.bmcl.2020.126969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 01/04/2020] [Accepted: 01/13/2020] [Indexed: 01/08/2023]
Abstract
In this work, according to the 'me-too me-better' design strategy, a peculiar side chain different from lefamulin at C14 position of pleuromutilin was introduced. A series of novel thioether pleuromutilin derivatives containing cyclohexane in the C14 chain was synthesized by ten-step synthesis reaction. All derivatives were characterized by Nuclear Magnetic Resonance (NMR) and High Resolution Mass Spectrometer (HRMS). Furthermore, majority of derivatives displayed moderate antibacterial activity in vitro. However, the compound 2C and 2J exhibited comparable or superior antibacterial activity to lefamulin. The summarized structure-activity relationship not only made the variety of pleuromutilin derivatives more diverse, but also provided new ideas for its design and development.
Collapse
Affiliation(s)
- Yun-Ge Li
- School of Pharmacy, Jinzhou Medical University, Jinzhou 121001, PR China
| | - Ju-Xian Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Guo-Ning Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Mei Zhu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Xue-Fu You
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China
| | - Yu-Cheng Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, PR China.
| | - Fan Zhang
- School of Pharmacy, Jinzhou Medical University, Jinzhou 121001, PR China
| |
Collapse
|
19
|
Relationship between Antimicrobial Susceptibility and Multilocus Sequence Type of Mycoplasma bovis Isolates and Development of a Method for Rapid Detection of Point Mutations Involved in Decreased Susceptibility to Macrolides, Lincosamides, Tetracyclines, and Spectinomycin. Appl Environ Microbiol 2019; 85:AEM.00575-19. [PMID: 31053579 DOI: 10.1128/aem.00575-19] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/24/2019] [Indexed: 01/16/2023] Open
Abstract
Mycoplasma bovis isolates belonging to the sequence type 5 (ST5) group, the dominant group in Japan since 1999, were low susceptible to 16-membered macrolides and tetracyclines and were confirmed to have a guanine-to-adenine transition mutation at position 748 in the 23S rRNA gene (rrl) and adenine-to-thymine transversion mutations at positions 965 and 967 in the 16S rRNA gene (rrs) (Escherichia coli numbering). Moreover, isolates of ST93 and ST155, members of the ST5 group, were low susceptible to lincosamides and azithromycin and showed an adenine-to-guanine transition mutation at position 2059 of rrl Isolates of ST93 were additionally low susceptible to spectinomycin and showed a cytosine-to-adenine transversion mutation at position 1192 of rrs Strains of the ST5 group seem to spread to Japan and Europe from North America with imported cows, while strains of ST93 and ST155 originated in Japan. Melting curve analysis using hybridization probes revealed the existence of point mutations involved in decreased susceptibility to macrolides, lincosamides, and spectinomycin, as demonstrated by changes in the melting curve shape and/or decreases in the melting peak temperature, so the susceptibility to these antimicrobials can be assessed on the same day. For decreased susceptibility to fluoroquinolones to exist, nonsynonymous mutations in the DNA gyrase gene (gyrA) and topoisomerase IV gene (parC) had to coexist. The combination of amino acid substitutions of serine at position 83 in gyrA and serine at position 80 in parC resulted in particularly low susceptibility to fluoroquinolones.IMPORTANCE Mycoplasma bovis is the main causal species of bovine mycoplasmal disease and leads to significant economic losses because of its severe symptoms, strong infectivity, and refractoriness. As for mastitis, culling cows with intramammary infections is a general countermeasure to prevent spreading. The conventional antimicrobial susceptibility test for mycoplasma is time-consuming and troublesome, but no quick and easy method for grasping the antimicrobial susceptibility of the causal strain exists at present. Treatment without antimicrobial susceptibility information may be one reason why M. bovis infection is refractory. Detecting a mutation involved in decreased susceptibility to antimicrobial agents of the causal strain makes it possible to easily select suitable antimicrobials for treatment, and this technique will help improve the cure rate and prevent the overuse of ineffective antimicrobial agents. In this study, we developed a technique to quickly and easily assess antimicrobial susceptibility based on the genetic characteristics of M. bovis strains in Japan.
Collapse
|
20
|
Zhu X, Xu S, Lu L, Wang S, Zhao Q, Li D, Li J, Zhao H, Xu B. Preparation, characterization, and in vivo evaluation of a polymorphic form of valnemulin hydrogen tartrate. J Vet Sci 2019; 20:e16. [PMID: 30944538 PMCID: PMC6441808 DOI: 10.4142/jvs.2019.20.e16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/20/2019] [Accepted: 02/08/2019] [Indexed: 12/03/2022] Open
Abstract
We prepared a polymorphic form of valnemulin hydrogen tartrate (Form I) to overcome the instability and irritating odor of valnemulin hydrochloride that affect its use in the production and application of veterinary drugs. The physicochemical properties of Form I were characterized by scanning electron microscopy, X-ray powder diffraction, infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. The results showed the crystal structure and thermal properties of Form I were very different from those of a commercially available form of valnemulin hydrogen tartrate (Form II). Form I and Form II were more stable than valnemulin hydrochloride after storage under irradiation and high humidity conditions, respectively. The solubility of Form I was 2.6 times that of Form II, and Form I was selected for use in pharmaceutical kinetics experiments in vivo. Compared to valnemulin hydrochloride, after oral administration at a dose of 10 mg/kg in pigs, Form I had similar pharmaceutical kinetic behavior but a slightly higher area under the concentration–time curve from time zero to the last measurable concentration. Consequently, Form I should be suitable for the development of simple formulations and be effective in the clinical application of veterinary drugs.
Collapse
Affiliation(s)
- Xinle Zhu
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Shixin Xu
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Lianshou Lu
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Shensen Wang
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Qi Zhao
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Dan Li
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Jian Li
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Hui Zhao
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Bingen Xu
- Safety Assessment Department, China Institute of Veterinary Drug Control, Beijing 100081, China
| |
Collapse
|
21
|
Fu Y, Liu Y, Yi Y, Liang J, Wu Q, Shang R. A Validated HPLC-MS/MS Assay for 14- O-[(4,6-Diaminopyrimidine-2-yl)thioacetyl] Mutilin in Biological Samples and Its Pharmacokinetic, Distribution and Excretion via Urine and Feces in Rats. Molecules 2019; 24:E790. [PMID: 30813235 PMCID: PMC6413085 DOI: 10.3390/molecules24040790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/09/2019] [Accepted: 02/15/2019] [Indexed: 11/16/2022] Open
Abstract
14-O-[(4,6-Diaminopyrimidine-2-yl)thioacetyl] mutilin (DPTM), a novel pleuromutilin candidate with a substituted pyrimidine moiety, has been confirmed to possess excellent antibacterial activity against Gram-positive bacteria. To illustrate the pharmacokinetic profile after intravenous (i.v.), intramuscular (i.m.) and oral (p.o.) administrations with DPTM, as well as tissue distribution and excretion via urine and feces in vivo, a specific, sensitive and robust HPLC-MS/MS method was first developed to determine DPTM in rat plasma, various tissues, urine and feces. The plasma, tissues, urine and feces samples were treated by protein precipitation with acetonitrile using tiamulin fumarate as an internal standard (IS). This method which was achieved on an HPLC system detector equipped with an ESI interface, was sensitive with 5 ng/mL as the lower limit of detection and exhibited good linearity (R² > 0.9900) in the range of 5⁻4000 ng/mL for plasma, various tissues, urine and feces, as well as intra-day precision, inter-day precision and accuracy. The matrix effects ranged from 94.2 to 109.7% with RSD ≤ 9.4% and the mean extraction recoveries ranged from 95.4 to 109.5% in plasma, tissue homogenates, urine and feces (RSD ≤ 9.9). After i.v., i.m. and p.o. administrations, DPTM was rapidly absorbed and metabolized in rats with the half-life (t1/2) of 1.70⁻1.86, 3.23⁻3.49 and 4.38⁻4.70 for 10, 25 and 75 mg/kg doses, respectively. The tissue distribution showed that DPTM was diffused into all the tested tissues, especially into the intestine and lung. Excretion via urine and feces studies demonstrated that DPTM was mainly excreted by feces after administration.
Collapse
Affiliation(s)
- Yunxing Fu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China.
| | - Yu Liu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China.
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China.
| | - Jianping Liang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China.
| | - Qingfeng Wu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China.
| |
Collapse
|
22
|
Fu Y, Ma L, Yi Y, Fan Y, Liang J, Shang R. A new pleuromutilin candidate with potent antibacterial activity against Pasteurella multocida. Microb Pathog 2019; 127:202-207. [PMID: 30529392 DOI: 10.1016/j.micpath.2018.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/06/2018] [Accepted: 12/06/2018] [Indexed: 12/27/2022]
Abstract
This study assessed the antimicrobial activity of 14-O-[(4,6-Diaminopyrimidine-2-yl) thioacetyl] mutilin (DPTM), a novel pleuromutilin candidate with a substituted pyrimidine moiety, against Pasteurella multocida. Minimum Inhibitory Concentration (MIC), Oxford Cup assay, and time-kill experiments were used to measure the activity of DPTM against P. multocida serotype A in vitro. We observed that DPTM was potent against Pasteurella multocida serotype A with the MIC value of 0.781 μg/mL. The mean inhibition-zone diameters of DPTM (50, 25, and 12.5 μg/mL) were 29.4, 24.2 and 20.1 mm, respectively. Time-kill experiments showed that the drug caused a rapid decline in the number of bacteria compared with the initial inoculum at 4 h and killed 94.6% of the bacteria during 24 h. Furthermore, DPTM activity was also assessed in a lung infection model challenged with 4.0 × 109 CFU/mL P. multocida serotype A. The results showed that DPTM significantly reduced mortality rate and bacterial load, and alleviated the pathological changes of lung. The antibacterial effect of DPTM found in this study suggested that it was useful in the prevention or control of pneumonia caused by P. multocida.
Collapse
Affiliation(s)
- Yunxing Fu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Lijun Ma
- The Second People's Hospital of Lanzhou City, Lanzhou, 730046, China
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Yuan Fan
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Jianping Liang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, PR China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| |
Collapse
|
23
|
Goethe O, Heuer A, Ma X, Wang Z, Herzon SB. Antibacterial properties and clinical potential of pleuromutilins. Nat Prod Rep 2019; 36:220-247. [PMID: 29979463 DOI: 10.1039/c8np00042e] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Covering: up to 2018Pleuromutilins are a clinically validated class of antibiotics derived from the fungal diterpene (+)-pleuromutilin (1). Pleuromutilins inhibit bacterial protein synthesis by binding to the peptidyl transferase center (PTC) of the ribosome. In this review we summarize the biosynthesis and recent total syntheses of (+)-pleuromutilin (1). We review the mode of interaction of pleuromutilins with the bacterial ribosome, which involves binding of the C14 extension and the tricyclic core to the P and A sites of the PTC, respectively. We provide an overview of existing clinical agents, and discuss the three primary modes of bacterial resistance (mutations in ribosomal protein L3, Cfr methylation, and efflux). Finally we collect structure-activity relationships from publicly available reports, and close with some forward looking statements regarding future development.
Collapse
Affiliation(s)
- Olivia Goethe
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA.
| | - Abigail Heuer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA.
| | - Xiaoshen Ma
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA.
| | - Zhixun Wang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA.
| | - Seth B Herzon
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA. and Department of Pharmacology, Yale School of Medicine, New Haven, Connecticut 06520, USA
| |
Collapse
|
24
|
Lemieux MR, Siricilla S, Mitachi K, Eslamimehr S, Wang Y, Yang D, Pressly JD, Kong Y, Park F, Franzblau SG, Kurosu M. An antimycobacterial pleuromutilin analogue effective against dormant bacilli. Bioorg Med Chem 2018; 26:4787-4796. [PMID: 30145051 PMCID: PMC6154393 DOI: 10.1016/j.bmc.2018.07.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/06/2018] [Accepted: 07/19/2018] [Indexed: 11/17/2022]
Abstract
Pleuromutilin is a promising pharmacophore to design new antibacterial agents for Gram-positive bacteria. However, there are limited studies on the development of pleuromutilin analogues that inhibit growth of Mycobacterium tuberculosis (Mtb). In screening of our library of pleuromutilin derivatives, UT-800 (1) was identified to kill replicating- and non-replicating Mtb with the MIC values of 0.83 and 1.20 μg/mL, respectively. UT-800 also kills intracellular Mtb faster than rifampicin at 2× MIC concentrations. Pharmacokinetic studies indicate that 1 has an oral bioavailability with an average F-value of 27.6%. Pleuromutilin may have the potential to be developed into an orally administered anti-TB drug.
Collapse
Affiliation(s)
- Maddie R Lemieux
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Shajila Siricilla
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Katsuhiko Mitachi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Shakiba Eslamimehr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Yuehong Wang
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612, United States
| | - Dong Yang
- Department of Microbiology, Immunology & Biochemistry, University of Tennessee Health Science Center, 858 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Jeffrey D Pressly
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Ying Kong
- Department of Microbiology, Immunology & Biochemistry, University of Tennessee Health Science Center, 858 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Frank Park
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States
| | - Scott G Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood Street, Chicago, IL 60612, United States
| | - Michio Kurosu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163-0001, United States.
| |
Collapse
|
25
|
Shang R, Zhang C, Yi Y, Liu Y, Pu W. Determination of a New Pleuromutilin Derivative in Broiler Chicken Plasma by RP-HPLC-UV and Its Application to a Pharmacokinetic Study. J Chromatogr Sci 2018; 56:604-610. [PMID: 29668863 DOI: 10.1093/chromsci/bmy033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 03/28/2018] [Indexed: 11/14/2022]
Abstract
A simple, sensitive and reproducible high-performance liquid chromatography method was developed and validated for the determination of 14-O-[(2-amino-1,3,4-thiadiazol-5-yl) thioacetyl] mutilin (ATTM), a new synthesized pleuromutilin derivative with potent antibacterial activity, in broiler chicken plasma after a single intravenous (i.v.), intramuscular (i.m.) or oral (p.o.) administration. Satisfactory separation was achieved on a ZORBAX Ecliplus C18 column (250 × 4.6, 5 μm) with UV detection at 279 nm, using a mobile phase comprising acetonitrile and ultrapure water (50:50, v/v). The elution was isocratic at ambient temperature with a flow rate of 1.0 mL/min. The method exhibited good linearity (R2 > 0.999) over the assayed concentration range (0.12-120.00 μg/mL) and demonstrated good intra- and inter-day precision and accuracy. The method was validated and successfully applied to the pharmacokinetic study of ATTM in chicken plasma after i.v. and p.o. administration.
Collapse
Affiliation(s)
- Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, Gansu Province, China
| | - Chao Zhang
- Lianyungang Animal Health Inspection Institute, Lianyungang, Jiangsu Province, China
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, Gansu Province, China
| | - Yu Liu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, Gansu Province, China
| | - Wanxia Pu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, Gansu Province, China
| |
Collapse
|
26
|
Richter MF, Hergenrother PJ. The challenge of converting Gram-positive-only compounds into broad-spectrum antibiotics. Ann N Y Acad Sci 2018; 1435:18-38. [PMID: 29446459 DOI: 10.1111/nyas.13598] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 12/07/2017] [Accepted: 12/14/2017] [Indexed: 12/14/2022]
Abstract
Multidrug resistant Gram-negative bacterial infections are on the rise, and there is a lack of new classes of drugs to treat these pathogens. This drug shortage is largely due to the challenge of finding antibiotics that can permeate and persist inside Gram-negative species. Efforts to understand the molecular properties that enable certain compounds to accumulate in Gram-negative bacteria based on retrospective studies of known antibiotics have not been generally actionable in the development of new antibiotics. A recent assessment of the ability of >180 diverse small molecules to accumulate in Escherichia coli led to predictive guidelines for compound accumulation in E. coli. These "eNTRy rules" state that compounds are most likely to accumulate if they contain a nonsterically encumbered ionizable Nitrogen (primary amines are the best), have low Three-dimensionality (globularity ≤ 0.25), and are relatively Rigid (rotatable bonds ≤ 5). In this review, we look back through 50+ years of antibacterial research and 1000s of derivatives and assess this historical data set through the lens of these predictive guidelines. The results are consistent with the eNTRy rules, suggesting that the eNTRy rules may provide an actionable and general roadmap for the conversion of Gram-positive-only compounds into broad-spectrum antibiotics.
Collapse
Affiliation(s)
- Michelle F Richter
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Paul J Hergenrother
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois
| |
Collapse
|
27
|
Alberti F, Khairudin K, Venegas ER, Davies JA, Hayes PM, Willis CL, Bailey AM, Foster GD. Heterologous expression reveals the biosynthesis of the antibiotic pleuromutilin and generates bioactive semi-synthetic derivatives. Nat Commun 2017; 8:1831. [PMID: 29184068 PMCID: PMC5705593 DOI: 10.1038/s41467-017-01659-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 10/06/2017] [Indexed: 11/10/2022] Open
Abstract
The rise in antibiotic resistance is a major threat for human health. Basidiomycete fungi represent an untapped source of underexploited antimicrobials, with pleuromutilin-a diterpene produced by Clitopilus passeckerianus-being the only antibiotic from these fungi leading to commercial derivatives. Here we report genetic characterisation of the steps involved in pleuromutilin biosynthesis, through rational heterologous expression in Aspergillus oryzae coupled with isolation and detailed structural elucidation of the pathway intermediates by spectroscopic methods and comparison with synthetic standards. A. oryzae was further established as a platform for bio-conversion of chemically modified analogues of pleuromutilin intermediates, and was employed to generate a semi-synthetic pleuromutilin derivative with enhanced antibiotic activity. These studies pave the way for future characterisation of biosynthetic pathways of other basidiomycete natural products in ascomycete heterologous hosts, and open up new possibilities of further chemical modification for the growing class of potent pleuromutilin antibiotics.
Collapse
Affiliation(s)
- Fabrizio Alberti
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK
- School of Life Sciences and Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Khairunisa Khairudin
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK
| | | | - Jonathan A Davies
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Patrick M Hayes
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - Christine L Willis
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Andy M Bailey
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK.
| | - Gary D Foster
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK.
| |
Collapse
|
28
|
Sulyok KM, Bekő K, Kreizinger Z, Wehmann E, Jerzsele Á, Rónai Z, Turcsányi I, Makrai L, Szeredi L, Jánosi S, Nagy SÁ, Gyuranecz M. Development of molecular methods for the rapid detection of antibiotic susceptibility of Mycoplasma bovis. Vet Microbiol 2017; 213:47-57. [PMID: 29292003 DOI: 10.1016/j.vetmic.2017.11.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/12/2017] [Accepted: 11/17/2017] [Indexed: 10/18/2022]
Abstract
Determining the antibiotic susceptibility profile of Mycoplasma bovis isolates in vitro provides the basis for the appropriate choice of antibiotics in the therapy. Traditionally, the antibiotic susceptibility examination of mycoplasmas is technically demanding, time-consuming and rarely performed in diagnostic laboratories. The aim of the present study was to develop rapid molecular assays to determine mutations responsible for elevated minimal inhibitory concentrations (MICs) to fluoroquinolones, tetracyclines, aminocyclitols, macrolides, lincosamides, phenicols and pleuromutilins in M. bovis. The nine mismatch amplification mutation assays (MAMA) and seven high resolution melt (HRM) tests designed in the present study enable the simultaneous detection of these genetic markers. The sensitivity of the assays varied between 102-105 copy numbers/reaction. Cross-reactions with other mycoplasmas occurring in cattle were detected in assays targeting universal regions (e.g. 16S rRNA). Nevertheless, results of the novel method were in accordance with sequence and MICs data of the M. bovis pure cultures. Also, the tests of clinical samples containing high amount of M. bovis DNA were congruent even in the presence of other Mycoplasma spp. The presented method is highly cost-effective and can provide an antibiogram to 12 antibiotics in approximately 3-4 days when previous isolation of M. bovis is applied. In order to assure the proper identification of the genetic markers at issue, the regions examined by the MAMA and HRM tests are overlapping. In conclusion, the developed assays have potential to be used in routine diagnostics for the detection of antibiotic susceptibility in M. bovis.
Collapse
Affiliation(s)
- Kinga M Sulyok
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary
| | - Katinka Bekő
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary
| | - Zsuzsa Kreizinger
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary
| | - Enikő Wehmann
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary
| | - Ákos Jerzsele
- University of Veterinary Medicine, Budapest, István utca 2, Hungary
| | - Zsuzsanna Rónai
- Veterinary Diagnostic Directorate, National Food Chain Safety Office, Budapest, 1143, Tábornok utca 2, Hungary
| | - Ibolya Turcsányi
- Veterinary Diagnostic Directorate, National Food Chain Safety Office, Budapest, 1143, Tábornok utca 2, Hungary
| | - László Makrai
- University of Veterinary Medicine, Budapest, István utca 2, Hungary
| | - Levente Szeredi
- Veterinary Diagnostic Directorate, National Food Chain Safety Office, Budapest, 1143, Tábornok utca 2, Hungary
| | - Szilárd Jánosi
- Veterinary Diagnostic Directorate, National Food Chain Safety Office, Budapest, 1143, Tábornok utca 2, Hungary
| | - Sára Ágnes Nagy
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary
| | - Miklós Gyuranecz
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, 1143, Hungária körút 21, Hungary.
| |
Collapse
|
29
|
Shang R, Yi Y, Zhang C, Fu Y, Liang J, Pu W. Antibacterial activity and pharmacokinetic profile of a promising antibacterial agent: 14-O-[(4-Amino-6-hydroxy-pyrimidine-2-yl)thioacetyl] mutilin. Pharmacol Res 2017; 129:424-431. [PMID: 29133214 DOI: 10.1016/j.phrs.2017.11.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/09/2017] [Accepted: 11/09/2017] [Indexed: 01/21/2023]
Abstract
A new pleuromutilin derivative, 14-O-[(4-Amino-6-hydroxy-pyrimidine-2-yl)thioacetyl] mutilin (APTM), has been synthesized and proved most potent antibacterial agent in in vitro assays, suggesting that further development of this compound may lead to a promising antibacterial drug. In this study, we further evaluated the cytotoxicity, antibacterial efficacy and the pharmacokinetic profile of APTM. In BRL 3A cells, 50% of viability was obtained when 363μg/mL of APTM was used, while retapamulin and tiamulin fumarate needed 49 and 28μg/mL, respectively, to reach this viability. Compared to tiamulin fumarate, APTM showed higher inhibition efficacy and faster bactericidal activity against S. aureus and lower 50% effective dose (ED50) in mice after a lethal challenge with methicillin-resistant Staphylococcus aureus (MRSA). Docking experiment for APTM showed a similar binding pattern with tiamulin. Furthermore, a simple, accurate and sensitive HPLC method for the determination of APTM in rabbit plasma was developed and successfully applied to pharmacokinetic study, in which the half life (t1/2), clearance rate (Cl) and the area under the plasma concentration-time curve (AUC0→∞) were 3.37h, 0.35L/h/kg and 70.68μg·h/m, respectively.
Collapse
Affiliation(s)
- Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, P. R. China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 730050 Lanzhou, China.
| | - Yunpeng Yi
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, P. R. China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 730050 Lanzhou, China
| | - Chao Zhang
- Lianyungang Animal Health Inspection Institute, Lianyungang, 222000, Lianyungang, China
| | - Yunxing Fu
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, P. R. China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 730050 Lanzhou, China
| | - Jianping Liang
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, P. R. China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 730050 Lanzhou, China
| | - Wanxia Pu
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, P. R. China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 730050 Lanzhou, China.
| |
Collapse
|
30
|
Siricilla S, Mitachi K, Yang J, Eslamimehr S, Lemieux MR, Meibohm B, Ji Y, Kurosu M. A New Combination of a Pleuromutilin Derivative and Doxycycline for Treatment of Multidrug-Resistant Acinetobacter baumannii. J Med Chem 2017; 60:2869-2878. [PMID: 28291943 PMCID: PMC5469366 DOI: 10.1021/acs.jmedchem.6b01805] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Multidrug-resistant (MDR) Acinetobacter baumannii is one of the most difficult Gram-negative bacteria to treat and eradicate. In a cell-based screening of pleuromutilin derivatives against a drug sensitive A. baumannii strain, new molecules (2-4) exhibit bacteriostatic activity with 3.13 μg/mL concentration and 1 shows bactericidal activity with an MBC of 6.25 μg/mL. The pleuromutilin derivative 1 displays strong synergistic effects with doxycycline in a wide range of concentrations. A 35/1 ratio of 1 and doxycycline (1-Dox 35/1) kills drug susceptible A. baumannii with the MBC of 2.0 μg/mL and an MDR A. baumannii with the MBC of 3.13 μg/mL. In vitro anti-Acinetobacter activity of 1-Dox 35/1 is superior to that of clinical drugs such as tobramycin, tigecycline, and colistin. The efficacy of 1-Dox 35/1 is evaluated in a mouse septicemia model; treatment of the infected C57BL/6 mice with 1-Dox 35/1 protects from lethal infection of A. baumannii with an ED50 value of <2.0 mg/kg.
Collapse
Affiliation(s)
- Shajila Siricilla
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| | - Katsuhiko Mitachi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| | - Junshu Yang
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 205 VSB, 1971 Commonwealth Avenue, St. Paul, MN 55108, United States
| | - Shakiba Eslamimehr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| | - Maddie R. Lemieux
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| | - Bernd Meibohm
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| | - Yinduo Ji
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 205 VSB, 1971 Commonwealth Avenue, St. Paul, MN 55108, United States
| | - Michio Kurosu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Avenue, Memphis, TN 38163, United States
| |
Collapse
|
31
|
Parker AM, House JK, Hazelton MS, Bosward KL, Sheehy PA. Comparison of culture and a multiplex probe PCR for identifying Mycoplasma species in bovine milk, semen and swab samples. PLoS One 2017; 12:e0173422. [PMID: 28264012 PMCID: PMC5338856 DOI: 10.1371/journal.pone.0173422] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 02/19/2017] [Indexed: 11/19/2022] Open
Abstract
Mycoplasma spp. are a major cause of mastitis, arthritis and pneumonia in cattle, and have been associated with reproductive disorders in cows. While culture is the traditional method of identification the use of PCR has become more common. Several investigators have developed PCR protocols to detect M. bovis in milk, yet few studies have evaluated other sample types or other important Mycoplasma species. Therefore the objective of this study was to develop a multiplex PCR assay to detect M. bovis, M. californicum and M. bovigenitalium, and evaluate its analytical performance against traditional culture of bovine milk, semen and swab samples. The PCR specificity was determined and the limit of detection evaluated in spiked milk, semen and swabs. The PCR was then compared to culture on 474 field samples from individual milk, bulk tank milk (BTM), semen and swab (vaginal, preputial, nose and eye) samples. Specificity analysis produced appropriate amplification for all M. bovis, M. californicum and M. bovigenitalium isolates. Amplification was not seen for any of the other Mollicutes or eubacterial isolates. The limit of detection of the PCR was best in milk, followed by semen and swabs. When all three Mycoplasma species were present in a sample, the limit of detection increased. When comparing culture and PCR, overall there was no significant difference in the proportion of culture and PCR positive samples. Culture could detect significantly more positive swab samples. No significant differences were identified for semen, individual milk or BTM samples. PCR identified five samples with two species present. Culture followed by 16S-23S rRNA sequencing did not enable identification of more than one species. Therefore, the superior method for identification of M. bovis, M. californicum and M. bovigenitalium may be dependent on the sample type being analysed, and whether the identification of multiple target species is required.
Collapse
Affiliation(s)
- Alysia M. Parker
- The University of Sydney, Sydney School of Veterinary Science, Faculty of Science, Camden, New South Wales Australia
- * E-mail:
| | - John K. House
- The University of Sydney, Sydney School of Veterinary Science, Faculty of Science, Camden, New South Wales Australia
| | - Mark S. Hazelton
- The University of Sydney, Sydney School of Veterinary Science, Faculty of Science, Camden, New South Wales Australia
| | - Katrina L. Bosward
- The University of Sydney, Sydney School of Veterinary Science, Faculty of Science, Camden, New South Wales Australia
| | - Paul A. Sheehy
- The University of Sydney, Sydney School of Veterinary Science, Faculty of Science, Camden, New South Wales Australia
| |
Collapse
|
32
|
Wang G, Zhao F. Crystal structure of 5-hydroxy-4,6,9,10-tetramethyl-1-oxo-6-vinyldecahydro-3a,9-propanocyclopenta[8]annulen-8-yl 2-((2-methyl-1-(3-methylbenzamido)propan-2-yl)thio)acetate, C 34H 49NO 5S. Z KRIST-NEW CRYST ST 2017. [DOI: 10.1515/ncrs-2016-0175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C34H49NO5S, monoclinic, P21 (no. 4), a = 14.4605(4) Å, b = 9.9703(4) Å, c = 22.7599(7) Å, β = 94.799(3) Å; V = 3269.90 Å3, Z = 4, R
gt(F) = 0.0638, wR
ref(F
2) = 0.1482, T = 293 K.
Collapse
Affiliation(s)
- Guirong Wang
- Gansu Agricultural University, No.1 Yingmen Village, Anning District, Lanzhou 730070, Gansu Province, P. R. China
| | - Fengwu Zhao
- Lanzhou Vocational Technical College, No. 37, LiushaGonglu, Anning District, Lanzhou 730070, Gansu Province, P. R. China
| |
Collapse
|
33
|
Yi Y, Xu X, Liu Y, Xu S, Huang X, Liang J, Shang R. Synthesis and antibacterial activities of novel pleuromutilin derivatives with a substituted pyrimidine moiety. Eur J Med Chem 2017; 126:687-695. [PMID: 27940400 DOI: 10.1016/j.ejmech.2016.11.054] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/20/2016] [Accepted: 11/26/2016] [Indexed: 11/28/2022]
Abstract
The alarming growth of multidrug-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococci (VRE) has become a major global health hazard. Therefore, urgent demand for new antibiotics with a unique mechanism of action is very necessary. The present study reports the design, synthesis, and antibacterial studies of a series of novel pleuromutilin derivatives with substituted 6-amino pyrimidine moieties. Most of the tested compounds exhibited highly potent anti-MRSA or Staphylococcus aureus (S. aureus) activities. 14-O-[(4,6-Diamino -pyrimidine-2-yl) thioacetyl] mutilin (3) and 14-O-[(2-((3R)-3-Hydroxymethylpiperidine-1-yl)-acetamido-6-aminopyrimidine-2-yl) thioacetyl] mutilin (5h) were the most active compounds and showed higher antibacterial activities. Compound 3 displayed rapid bactericidal activity and affected bacterial growth with the same manner as tiamulin fumarate. Docking experiments for compounds 3 and 5h carried out on the peptidyl transferase center (PTC) of 23S rRNA provided the information about the binding model. In vivo mouse systemic infection experimental results confirmed the therapeutic efficacy of compound 3, with ED50 of 4.22 mg/kg body weight against MRSA.
Collapse
Affiliation(s)
- Yunpeng Yi
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 335 Jiangouyan, Lanzhou, 730050, China
| | - Ximing Xu
- Institut Pasteur, Unité de Pathogenèse des infections vasculaires, Département de Biologie Cellulaire et Infection, Paris, 75015, France
| | - Yu Liu
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 335 Jiangouyan, Lanzhou, 730050, China
| | - Shuijin Xu
- Yancheng YouHua Pharmaceutical & Chemical Technology Co., Ltd., Yancheng, 224555, China
| | - Xin Huang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 335 Jiangouyan, Lanzhou, 730050, China
| | - Jianping Liang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 335 Jiangouyan, Lanzhou, 730050, China.
| | - Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, China; Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, 335 Jiangouyan, Lanzhou, 730050, China.
| |
Collapse
|
34
|
Mutations Associated with Decreased Susceptibility to Seven Antimicrobial Families in Field and Laboratory-Derived Mycoplasma bovis Strains. Antimicrob Agents Chemother 2017; 61:AAC.01983-16. [PMID: 27895010 DOI: 10.1128/aac.01983-16] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 11/17/2016] [Indexed: 11/20/2022] Open
Abstract
The molecular mechanisms of resistance to fluoroquinolones, tetracyclines, an aminocyclitol, macrolides, a lincosamide, a phenicol, and pleuromutilins were investigated in Mycoplasma bovis For the identification of mutations responsible for the high MICs of certain antibiotics, whole-genome sequencing of 35 M. bovis field isolates and 36 laboratory-derived antibiotic-resistant mutants was performed. In vitro resistant mutants were selected by serial passages of M. bovis in broth medium containing subinhibitory concentrations of the antibiotics. Mutations associated with high fluoroquinolones MICs were found at positions 244 to 260 and at positions 232 to 250 (according to Escherichia coli numbering) of the quinolone resistance-determining regions of the gyrA and parC genes, respectively. Alterations related to elevated tetracycline MICs were described at positions 962 to 967, 1058, 1195, 1196, and 1199 of genes encoding the 16S rRNA and forming the primary tetracycline binding site. Single transversion at position 1192 of the rrs1 gene resulted in a spectinomycin MIC of 256 μg/ml. Mutations responsible for high macrolide, lincomycin, florfenicol, and pleuromutilin antibiotic MICs were identified in genes encoding 23S rRNA. Understanding antibiotic resistance mechanisms is an important tool for future developments of genetic-based diagnostic assays for the rapid detection of resistant M. bovis strains.
Collapse
|
35
|
Gallo P, Di Marco Pisciottano I, Urbani V, Bianco R, Picarelli E. A novel method to determine valnemulin in feedingstuffs for several animal species by liquid chromatography-electrospray tandem mass spectrometry. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2016; 33:1678-1684. [DOI: 10.1080/19440049.2016.1237780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Pasquale Gallo
- Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | | | - Valeria Urbani
- Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Raffaele Bianco
- Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Emanuela Picarelli
- Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| |
Collapse
|
36
|
Lysnyansky I, Ayling RD. Mycoplasma bovis: Mechanisms of Resistance and Trends in Antimicrobial Susceptibility. Front Microbiol 2016; 7:595. [PMID: 27199926 PMCID: PMC4846652 DOI: 10.3389/fmicb.2016.00595] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 04/11/2016] [Indexed: 11/13/2022] Open
Abstract
Mycoplasma bovis is a cell-wall-less bacterium and belongs to the class Mollicutes. It is the most important etiological agent of bovine mycoplasmoses in North America and Europe, causing respiratory disease, mastitis, otitis media, arthritis, and reproductive disease. Clinical disease associated with M. bovis is often chronic, debilitating, and poorly responsive to antimicrobial therapy, resulting in significant economic loss, the full extent of which is difficult to estimate. Until M. bovis vaccines are universally available, sanitary control measures and antimicrobial treatment are the only approaches that can be used in attempts to control M. bovis infections. However, in vitro studies show that many of the current M. bovis isolates circulating in Europe have high minimum inhibitory concentrations (MIC) for many of the commercially available antimicrobials. In this review we summarize the current MIC trends indicating the development of antimicrobial resistance in M. bovis as well as the known molecular mechanisms by which resistance is acquired.
Collapse
Affiliation(s)
- Inna Lysnyansky
- Mycoplasma Unit, Division of Avian and Aquatic Diseases, Kimron Veterinary Institute Beit Dagan, Israel
| | - Roger D Ayling
- Department of Bacteriology, Animal and Plant Health Agency Addlestone, UK
| |
Collapse
|
37
|
Li H, Wang Y, Li X, Fu Q, Shan Y, Liu T, Xia X. Determination of valnemulin in swine and bovine tissues by ultra-high performance liquid chromatography–tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1014:102-6. [DOI: 10.1016/j.jchromb.2016.02.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/05/2016] [Accepted: 02/06/2016] [Indexed: 11/29/2022]
|
38
|
Responses in whole-body amino acid kinetics to an acute, sub-clinical endotoxin challenge in lambs. Br J Nutr 2015; 115:576-84. [DOI: 10.1017/s0007114515004894] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AbstractSome effects of parasitism, endotoxaemia or sepsis can be mitigated by provision of extra protein. Supplemented protein may encompass a metabolic requirement for specific amino acids (AA). The current study investigates a method to identify and quantify the amounts of AA required during inflammation induced by an endotoxin challenge. One of each pair of six twin sheep was infused in the jugular vein for 20 h with either saline (control) or lipopolysaccharide (LPS, 2 ng/kg body weight per min) fromEscherichia coli. Between 12 and 20 h a mixture of stable isotope-labelled AA was infused to measure irreversible loss rates. From 16 to 20 h all sheep were supplemented with a mixture of unlabelled AA infused intravenously. Blood samples were taken before the start of infusions, and then continuously over intervals between 14 and 20 h. At 20 h the sheep were euthanised, and liver and kidney samples were taken for measurement of serine-threonine dehydratase (SDH) activity. LPS infusion decreased plasma concentrations of most AA (P<0·05;P<0·10 for leucine and tryptophan), except for phenylalanine (which increasedP=0·022) and tyrosine. On the basis of the incremental response to the supplemental AA, arginine, aspartate, cysteine, glutamate, lysine (tendency only), glycine, methionine, proline, serine and threonine were important in the metabolic response to the endotoxaemia. The AA infusion between 16 and 20 h restored the plasma concentrations in the LPS-treated sheep for the majority of AA, except for glutamine, isoleucine, methionine, serine and valine. LPS treatment increased (P<0·02) SDH activity in both liver and kidney. The approach allows quantification of key AA required during challenge situations.
Collapse
|
39
|
Yuan LG, Tang YZ, Zhang YX, Sun J, Luo XY, Zhu LX, Zhang Z, Wang R, Liu YH. Dosage assessment of valnemulin in pigs based on population pharmacokinetic and Monte Carlo simulation. J Vet Pharmacol Ther 2015; 38:400-9. [PMID: 25604162 DOI: 10.1111/jvp.12199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 11/21/2014] [Indexed: 11/27/2022]
Abstract
To estimate the valnemulin pharmacokinetic profile in a swine population and to assess a dosage regimen for increasing the likelihood of optimization. This study was, respectively, performed in 22 sows culled by p.o. administration and in 80 growing-finishing pigs by i.v. administration at a single dose of 10 mg/kg to develop a population pharmacokinetic model and Monte Carlo simulation. The relationships among the plasma concentration, dose, and time of valnemulin in pigs were illustrated as C(i,v) = X(0 )(8.4191 × 10(-4) × e(-0.2371t) + 1.2788 × 10(-5) × e(-0.0069t)) after i.v. and C(p.o) = X(0) (-8.4964 × 10(-4) × e(-0.5840t) + 8.4195 × e(-0.2371t) + 7.6869 × 10(-6) × e(-0.0069t)) after p.o. Monte Carlo simulation showed that T(>MIC) was more than 24 h when a single daily dosage at 13.5 mg/kg BW in pigs was administrated by p.o., and MIC was 0.031 mg/L. It was concluded that the current dosage regimen at 10-12 mg/kg BW led to valnemulin underexposure if the MIC was more than 0.031 mg/L and could increase the risk of treatment failure and/or drug resistance.
Collapse
Affiliation(s)
- L G Yuan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China.,Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou, Guangdong Province, China
| | - Y Z Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China.,Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou, Guangdong Province, China
| | - Y X Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China.,Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou, Guangdong Province, China
| | - J Sun
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - X Y Luo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - L X Zhu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Z Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - R Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Y H Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, China
| |
Collapse
|
40
|
Zhu X, Xu S, Xu Q. Preparation of valnemulin hydrogen fumarate and its enhanced stability compared with valnemulin hydrochloride. Pharm Dev Technol 2015; 21:338-45. [PMID: 25597619 DOI: 10.3109/10837450.2014.1003656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT It is necessary to develop a new salt of valnemulin to replace the veterinary antibiotic, e.g. valnemulin hydrochloride, in order to overcome its instability during storage and preparation. OBJECTIVE The objective of this study was to prepare a novel organic acid salt, valnemulin hydrogen fumarate, and to investigate its stability compared with valnemulin hydrochloride. MATERIALS AND METHODS The crystal of valnemulin hydrogen fumarate was prepared by modified crystallization method; the enhanced stabilities of valnemulin hydrogen fumarate were conducted under irradiation and humid conditions, and the experimental results were simulated at AM1 level of calculations. RESULTS Valnemulin hydrogen fumarate was more stable than valnemulin hydrochloride. After irradiation for 180 days, the content of valnemulin hydrogen fumarate decreased slightly 2.7%, whereas the content of valnemulin hydrochloride had an obvious decrease of 32.8%. Meanwhile, valnemulin hydrogen fumarate showed better anti-RH (relative humidity) ability than valnemulin hydrochloride. Under conditions of 65% and 85% RH, the absorption values of valnemulin hydrogen fumarate towards water were 0.75% and 1.20% at 48 h, whereas those of valnemulin hydrochloride were 4.50% and 9.71%, respectively. CONCLUSION The enhanced stability of valnemulin hydrogen fumarate could be attributed to its good crystallinity in comparison with the amorphous valnemulin hydrochloride.
Collapse
Affiliation(s)
- Xinle Zhu
- a Safety Assessment Department , China Institute of Veterinary Drug Control , Beijing , China
| | - Shixin Xu
- a Safety Assessment Department , China Institute of Veterinary Drug Control , Beijing , China
| | - Qian Xu
- a Safety Assessment Department , China Institute of Veterinary Drug Control , Beijing , China
| |
Collapse
|
41
|
Yang S, Shi W, Hu D, Zhang S, Zhang H, Wang Z, Cheng L, Sun F, Shen J, Cao X. In vitro and in vivo metabolite profiling of valnemulin using ultraperformance liquid chromatography-quadrupole/time-of-flight hybrid mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:9201-10. [PMID: 25156794 PMCID: PMC4166035 DOI: 10.1021/jf5012402] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Valnemulin, a semisynthetic pleuromutilin derivative related to tiamulin, is broadly used to treat bacterial diseases of animals. Despite its widespread use, metabolism in animals has not yet been fully investigated. To better understand valnemulin biotransformation, in this study, metabolites of valnemulinin in in vitro and in vivo rats, chickens, swines, goats, and cows were identified and elucidated using ultraperformance liquid chromatography-quadrupole/time-of-flight hybrid mass spectrometry (UPLC-Q/TOF-MS). As a result, there were totally 7 metabolites of valnemulin identified in vitro and 75, 61, and 74 metabolites detected in in vivo rats, chickens, and swines, respectively, and the majority of metabolites were reported for the first time. The main metabolic pathways of valnemulin were found to be hydroxylation in the mutilin part (the ring system) and the side chain, oxidization on the sulfur of the side chain to form S-oxides, hydrolysis of the amido bond, and acetylization in the amido of the side chain. In addition, hydroxylation in the mutilin part was proposed to be the primary metabolic route. Furthermore, the results revealed that 2β-hydroxyvalnemulin (V1) and 8α-hydroxyvalnemulin (V2) were the major metabolites for rats and swines and S-oxides (V6) in chickens.
Collapse
Affiliation(s)
- Shupeng Yang
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Weimin Shi
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Dingfei Hu
- Department
of Civil and Environmental Engineering, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Suxia Zhang
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Huiyan Zhang
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Zhanhui Wang
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Linli Cheng
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Feifei Sun
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Jianzhong Shen
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
| | - Xingyuan Cao
- College
of Veterinary Medicine, China Agricultural University, Beijing Laboratory for Food Quality and Safety and
Beijing Key Laboratory of Detection Technology for Animal-Derived
Food Safety, Beijing 100193, People’s Republic of China
- Key
Laboratory of Detection for Veterinary Drug Residue and Illegal Additive, Ministry of Agriculture, Beijing 100193, People’s Republic of China
- (X.C.) Phone: +86-10-6273-1201. Fax: +86-10-6273-1032. E-mail:
| |
Collapse
|
42
|
Shang R, Pu X, Xu X, Xin Z, Zhang C, Guo W, Liu Y, Liang J. Synthesis and biological activities of novel pleuromutilin derivatives with a substituted thiadiazole moiety as potent drug-resistant bacteria inhibitors. J Med Chem 2014; 57:5664-78. [PMID: 24892980 DOI: 10.1021/jm500374c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of novel pleuromutilin derivatives possessing thiadiazole moieties were synthesized via acylation reactions under mild conditions. The in vitro antibacterial activities of the derivatives against methicillin-resistant Staphylococcus aureus, methicillin-resistant Staphylococcus epidermidis, Escherichia coli, and Streptococcus agalactiae were tested by the agar dilution method and Oxford cup assay. The majority of the tested compounds displayed moderate antibacterial activities. Importantly, the three compounds with amino or tertiary amine groups in their side chains, 11, 13b, and 15c, were the most active antibacterial agents. Docking experiments carried out on the peptidyl transferase center (PTC) of 23S rRNA proved that there is a reasonable direct correlation between the binding free energy (ΔGb, kcal/mol) and the antibacterial activity. Moreover, the pharmacokinetic profiles of 11 and 15c in rat were characterized by moderate clearance and oral bioavailability.
Collapse
Affiliation(s)
- Ruofeng Shang
- Key Laboratory of New Animal Drug Project of Gansu Province; Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS , 335 Jiangouyan, Lanzhou 730050, China
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Horwood PF, Schibrowski ML, Fowler EV, Gibson JS, Barnes TS, Mahony TJ. IsMycoplasma bovisa missing component of the bovine respiratory disease complex in Australia? Aust Vet J 2014; 92:185-91. [DOI: 10.1111/avj.12184] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2013] [Indexed: 12/14/2022]
Affiliation(s)
- PF Horwood
- Animal Science; Queensland Department of Agriculture, Fisheries & Forestry; St Lucia Queensland Australia
| | - ML Schibrowski
- The University of Queensland; School of Veterinary Science; Gatton Queensland Australia
- The University of Queensland; Queensland Alliance for Agriculture and Food Innovation; Centre for Animal Science; St Lucia Queensland 4072 Australia
| | - EV Fowler
- Animal Science; Queensland Department of Agriculture, Fisheries & Forestry; St Lucia Queensland Australia
| | - JS Gibson
- The University of Queensland; School of Veterinary Science; Gatton Queensland Australia
| | - TS Barnes
- The University of Queensland; Queensland Alliance for Agriculture and Food Innovation; Centre for Animal Science; St Lucia Queensland 4072 Australia
| | - TJ Mahony
- The University of Queensland; Queensland Alliance for Agriculture and Food Innovation; Centre for Animal Science; St Lucia Queensland 4072 Australia
| |
Collapse
|
44
|
Zhao DH, Zhou YF, Yu Y, Shi W, Yang X, Xiao X, Deng H, Qiao GG, Fang BH, Liu YH. Integration of pharmacokinetic and pharmacodynamic indices of valnemulin in broiler chickens after a single intravenous and intramuscular administration. Vet J 2014; 201:109-15. [PMID: 24906499 DOI: 10.1016/j.tvjl.2014.05.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 03/06/2014] [Accepted: 05/02/2014] [Indexed: 11/30/2022]
Abstract
The antibacterial efficacy of valnemulin against Staphylococcus aureus was studied ex vivo in broiler chickens after intravenous and intramuscular administration at a dose of 10 mg/kg bodyweight (BW). The minimum inhibitory concentrations (MICs) of valnemulin against S. aureus strains ATCC 25923 in broth and serum were 0.12 and 1 µg/mL, respectively. The MIC50 and MIC90 of valnemulin against all susceptible S. aureus strains isolated from chickens in the test population were 0.06 and 0.12 μg/mL, respectively. Protein binding, which greatly influences the efficacy of valnemulin, was assayed by equilibrium dialysate in vitro. A high binding fraction of 86.2% was found, which seems in good agreement with the difference of bacterial susceptibility tests observed in broth and serum. The surrogate index of AUC0-24/MIC required for the lowest bacteriostatic effect, and 2 log10CFU reduction in bacterial count were 24.4 h and 38.0 h, respectively. The required daily dose of valnemulin for a bacteriostatic activity was calculated to be 15 mg/kg BW based on the MIC90 of 0.12 µg/mL. Considering the slow disposition process of valnemulin and an AUC0-24 h value of more than 10-fold obtained from diseased animals, a suggested dose of 3 mg/kg BW is sufficient to achieve a satisfactory therapeutic efficacy in infected broilers. Due to the time-dependent antibacterial characteristics of valnemulin, the recommended daily dose should be split into two or three sub-doses to achieve the highest effectiveness while diminishing the risk of development of bacterial resistance.
Collapse
Affiliation(s)
- Dong-Hao Zhao
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Yu-Feng Zhou
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Yang Yu
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Wei Shi
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Xue Yang
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Xia Xiao
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Hui Deng
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Guilin Gary Qiao
- 8725, John J Kingman Rd, MS 6201, Ft Belvoir, VA, 22060-6201, USA
| | - Bing-Hu Fang
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ya-Hong Liu
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China.
| |
Collapse
|
45
|
Guo H, Liu Y, Fang B, Ding H, Wang M, He L. DETERMINATION OF VALNEMULIN RESIDUES IN PORCINE TISSUES BY MOLECULARLY IMPRINTED SOLID-PHASE EXTRACTION COUPLING WITH HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.803203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Hongbin Guo
- a National Reference Laboratory of Veterinary Drug Residues (SCAU) , College of Veterinary Medicine, South China Agricultural University , Guangzhou , China
- b Supervision and Testing Center of Food Quality , Ministry of Agriculture , Zhanjiang , China
| | - Yahong Liu
- a National Reference Laboratory of Veterinary Drug Residues (SCAU) , College of Veterinary Medicine, South China Agricultural University , Guangzhou , China
| | - Binghu Fang
- a National Reference Laboratory of Veterinary Drug Residues (SCAU) , College of Veterinary Medicine, South China Agricultural University , Guangzhou , China
| | - Huanzhong Ding
- a National Reference Laboratory of Veterinary Drug Residues (SCAU) , College of Veterinary Medicine, South China Agricultural University , Guangzhou , China
| | - Mingyue Wang
- b Supervision and Testing Center of Food Quality , Ministry of Agriculture , Zhanjiang , China
| | - Limin He
- a National Reference Laboratory of Veterinary Drug Residues (SCAU) , College of Veterinary Medicine, South China Agricultural University , Guangzhou , China
| |
Collapse
|
46
|
Gautier-Bouchardon AV, Ferré S, Le Grand D, Paoli A, Gay E, Poumarat F. Overall decrease in the susceptibility of Mycoplasma bovis to antimicrobials over the past 30 years in France. PLoS One 2014; 9:e87672. [PMID: 24503775 PMCID: PMC3913625 DOI: 10.1371/journal.pone.0087672] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 12/28/2013] [Indexed: 11/18/2022] Open
Abstract
Mycoplasma (M.) bovis is frequently implicated in respiratory diseases of young cattle worldwide. Today, to combat M. bovis in Europe, only antimicrobial therapy is available, but often fails, leading to important economical losses. The antimicrobial susceptibility of M. bovis is not covered by antimicrobial resistance surveillance networks. The objectives of this study were to identify resistances that were acquired over the last 30 years in France and to determine their prevalence within contemporary strains. The minimum inhibition concentration (MIC) values of 12 antimicrobials, considered active on M. bovis, were compared, using an agar dilution method, between 27 and 46 M. bovis isolates respectively obtained in 1978-1979 and in 2010-2012 from 73 distinct respiratory disease outbreaks in young cattle all over France. For eight antimicrobials, resistances were proven to be acquired over the period and expressed by all contemporary strains. The increase of the MIC value that inhibited 50% of the isolates (MIC50) was: i) substantial for tylosin, tilmicosin, tulathromycin and spectinomycin, from 2 to >64, 2 to >128, 16 to 128 and 4 to >64 µg/mL, respectively, ii) moderate for enrofloxacin, danofloxacin, marbofloxacin and oxytetracycline, from 0.25 to 0.5, 0.25 to 0.5, 0.5 to 1, 32 to >32 µg/mL, respectively. No differences were observed for gamithromycin, tildipirosin, florfenicol and valnemulin with MIC50 of 128, 128, 8, <0.03 µg/mL, respectively. If referring to breakpoint MIC values published for respiratory bovine pathogens, all contemporary isolates would be intermediate in vivo for fluoroquinolones and resistant to macrolides, oxytetracycline, spectinomycin and florfenicol.
Collapse
Affiliation(s)
- Anne V. Gautier-Bouchardon
- ANSES, Laboratoire de Ploufragan/Plouzané, Unité Mycoplasmologie-Bactériologie, Ploufragan, France
- Université Européenne de Bretagne, Rennes, France
| | - Séverine Ferré
- ANSES, Laboratoire de Ploufragan/Plouzané, Unité Mycoplasmologie-Bactériologie, Ploufragan, France
- Université Européenne de Bretagne, Rennes, France
| | - Dominique Le Grand
- ANSES, Laboratoire de Lyon, UMR Mycoplasmoses des Ruminants, Lyon, France
- Université de Lyon, VetAgro Sup, UMR Mycoplasmoses des Ruminants, Marcy L’Etoile, France
| | - Agnès Paoli
- ANSES, Laboratoire de Lyon, UMR Mycoplasmoses des Ruminants, Lyon, France
- Université de Lyon, VetAgro Sup, UMR Mycoplasmoses des Ruminants, Marcy L’Etoile, France
| | - Emilie Gay
- ANSES, Laboratoire de Lyon, Unité Epidémiologie, Lyon, France
| | - François Poumarat
- ANSES, Laboratoire de Lyon, UMR Mycoplasmoses des Ruminants, Lyon, France
- Université de Lyon, VetAgro Sup, UMR Mycoplasmoses des Ruminants, Marcy L’Etoile, France
| |
Collapse
|
47
|
Stanton AL, Kelton DF, LeBlanc SJ, Wormuth J, Fox LK, Leslie KE. Effects of tulathromycin on incidence of various diseases and growth of young heifers. J Am Vet Med Assoc 2013; 243:267-76. [DOI: 10.2460/javma.243.2.267] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
48
|
Zhao DH, Zhang Z, Zhang CY, Liu ZC, Deng H, Yu JJ, Guo JP, Liu YH. Population pharmacokinetics of valnemulin in swine. J Vet Pharmacol Ther 2013; 37:59-65. [PMID: 23617793 DOI: 10.1111/jvp.12054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 03/26/2013] [Indexed: 11/27/2022]
Abstract
This study was carried out in 121 pigs to develop a population pharmacokinetic (PPK) model by oral (p.o.) administration of valnemulin at a single dose of 10 mg/kg. Serum biochemistry parameters of each pig were determined prior to drug administration. Three to five blood samples were collected at random time points, but uniformly distributed in the absorption, distribution, and elimination phases of drug disposition. Plasma concentrations of valnemulin were determined by high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The concentration-time data were fitted to PPK models using nonlinear mixed effect modeling (NONMEM) with G77 FORTRAN compiler. NONMEM runs were executed using Wings for NONMEM. Fixed effects of weight, age, sex as well as biochemistry parameters, which may influence the PK of valnemulin, were investigated. The drug concentration-time data were adequately described by a one-compartmental model with first-order absorption. A random effect model of valnemulin revealed a pattern of log-normal distribution, and it satisfactorily characterized the observed interindividual variability. The distribution of random residual errors, however, suggested an additive model for the initial phase (<12 h) followed by a combined model that consists of both proportional and additive features (≥ 12 h), so that the intra-individual variability could be sufficiently characterized. Covariate analysis indicated that body weight had a conspicuous effect on valnemulin clearance (CL/F). The featured population PK values of Ka , V/F and CL/F were 0.292/h, 63.0 L and 41.3 L/h, respectively.
Collapse
Affiliation(s)
- D H Zhao
- National Reference Laboratory of Veterinary Drug Residues (SCAU), College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Sun J, Yuan L, Zhu L, He L, Luo X, Wang R, Liu Y. Pharmacokinetics and bioavailability of valnemulin in Muscovy ducks (Cairina moschata). Br Poult Sci 2012; 53:374-8. [DOI: 10.1080/00071668.2012.703776] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
50
|
Hermeyer K, Peters M, Brügmann M, Jacobsen B, Hewicker-Trautwein M. Demonstration of Mycoplasma bovis by immunohistochemistry and in situ hybridization in an aborted bovine fetus and neonatal calf. J Vet Diagn Invest 2012; 24:364-9. [PMID: 22362536 DOI: 10.1177/1040638711435145] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Mycoplasmas are host-specific commensals on mucous membranes of the genital tract, but infection and clinical disease by Mycoplasma bovis in the genital tract of cattle is not well described. In the current study, 1 aborted bovine fetus and 1 neonatal calf were examined macroscopically and histologically. For the detection of M. bovis, bacterial isolation, immunohistochemistry (IHC), and in situ hybridization (ISH) were performed. For further characterization of the inflammatory infiltrates, IHC was performed using antibodies to cluster of differentiation (CD)3, CD79a, lysozyme, L1, S-100A8, S-100A9, and von Willebrand factor VIII. Gross examination revealed a lobular consolidation of the lung. Histologically, the lungs of both animals showed an interstitial pneumonia associated with suppurative bronchopneumonia, intraalveolar multinucleated giant cells, and lymphocytic aggregates. The expression of L1, S-100A8, and S-100A9 in multinucleated giant cells supports a histiocytic origin. Mycoplasma bovis antigen was detected by IHC in brain, lung, liver, and placenta of the fetus, and M. bovis DNA was detected by ISH in various organs of the fetus, including lung and placenta and within the lung of the calf.
Collapse
Affiliation(s)
- Kathrin Hermeyer
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | | | | | | |
Collapse
|