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Nguyen DD, Ho NT, Dover LG, Vo AHM, Ly HTT, Doan PM, Nguyen HT, Luu NTT, Pham AN, Tran HTT. Novel Variant and Known Mutation in 23S rRNA Gene of Mycoplasma pneumoniae, Northern Vietnam, 2023. Emerg Infect Dis 2024; 30:1034-1036. [PMID: 38573165 PMCID: PMC11060462 DOI: 10.3201/eid3005.231632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
During a 2023 outbreak of Mycoplasma pneumoniae-associated community-acquired pneumonia among children in northern Vietnam, we analyzed M. pneumoniae isolated from nasopharyngeal samples. In almost half (6 of 13) of samples tested, we found known A2063G mutations (macrolide resistance) and a novel C2353T variant on the 23S rRNA gene.
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Zhang Z, Dou H, Yuan Q, Shi D, Wan R, Tu P, Xin D, Guo S. Proteomic and Phenotypic Studies of Mycoplasma pneumoniae Revealed Macrolide-Resistant Mutation ( A2063G) Associated Changes in Protein Composition and Pathogenicity of Type I Strains. Microbiol Spectr 2023; 11:e0461322. [PMID: 37378520 PMCID: PMC10434051 DOI: 10.1128/spectrum.04613-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
Mycoplasma pneumoniae (MP) is an important respiratory pathogen, the prevalence of macrolide-resistant MP (mainly containing A2063G mutation in 23S rRNA) increased in recent years. Epidemiological studies suggest a higher prevalence of type I resistant (IR) strains than corresponding sensitive (IS/IIS) strains, but not type II resistant (IIR) strains. Here, we aimed to analyze the factors underlying the altered prevalence of IR strains. First, proteomic analyses exhibit the protein compositions were type specific, while more differential proteins were detected between IS and IR (227) than IIS and IIR strains (81). mRNA level detection suggested posttranscriptional regulation of these differential proteins. Differential protein-related phenotypic changes were also detected: (i) P1 abundance was different between genotypes (I < II, IR < IS), the adhesion of MPs showed accordance to P1 abundance within IS and IIS strains; (ii) type I, especially IR, strains had a higher proliferation rate, which is potentially associated with differential proteins participating in glycolysis and one carbon pool metabolisms; (iii) A549 cells infected with IR strains had lower activity of caspase-3 and higher levels IL-8, but the differences were not significant between groups (P > 0.05). Correlations of P1 abundance to caspase-3 activity and proliferation rate to the level of IL-8 were obtained. These results suggest changes in protein composition influenced the pathogenicity of MP, especially in IR strains, which may impact the prevalence of MP strains of different genotypes. IMPORTANCE The prevalence of macrolide-resistant MPs increased the difficulty in treatment of MP infections and posed potential threats to children's health. Epidemiological studies showed a high prevalence of IR-resistant strains (mainly A2063G in 23S rRNA) in these years. However, the trigger mechanisms for this phenomenon are not clear. In this paper, proteomic and phenotypic studies suggest that IR strains have reduced levels of multiple adhesion proteins and increased proliferation rate, which may lead to higher transmission rate of IR strains in the population. This suggests that we should pay attention to the prevalence of IR strains.
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Affiliation(s)
- Zhikun Zhang
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Department of Pathogenic Biology, School of Basic Medicine Southwest Medical University, Luzhou, China
| | - Haiwei Dou
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Qing Yuan
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Dawei Shi
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Ruijie Wan
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Peng Tu
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Deli Xin
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Shuilong Guo
- Department of Science and Technology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Guo D, Hu W, Xu B, Li J, Li D, Li S, Wu Z, Wei R, Tian X, Shen K, Xin D. Allele-specific real-time PCR testing for minor macrolide-resistant Mycoplasma Pneumoniae. BMC Infect Dis 2019; 19:616. [PMID: 31299916 PMCID: PMC6626384 DOI: 10.1186/s12879-019-4228-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 06/26/2019] [Indexed: 11/17/2022] Open
Abstract
Background The point mutations in 23S rRNA gene of Mycoplasma pneumoniae (M. pneumoniae) can lead to high-level resistance to macrolides. This study aimed to evaluate allele-specific real-time PCR (ASPCR) to detect the resistance-related mutations located at positions A2063G and A2064G of 23S rRNA gene. Methods We detected 178 pharyngeal swab specimens and calculated the proportions of resistant and sensitive quasispecies using ASPCR assays. ASPCR assays can detect down to 10 copies of 23S rRNA gene and achieved sensitivities of < 0.1% for A2063G and A2064G. We also compared the findings of ASPCR with the results of nested PCR with sequencing. Results Of 178 samples, 164 were found to have M. pneumoniae including 90.85% (149/164) samples with macrolide-resistant M. pneumoniae (MRMP) quasispecies by ASPCR, while 153 were found to be M. pneumoniae-positive including 71.90% (110/153) samples with MRMP quasispecies by nested PCR with sequencing. Of the 164 M. pneumoniae-positive samples, 61.59% (101/164) had the mixed population of wild-type and mutant M. pneumoniae, and 56.44% (57/101) of the latter contained the mutations at low frequency (≤50%). Conclusion ASPCR indicated that sensitive and resistant quasispecies coexisted in most of the M. pneumoniae positive samples. The ASPCR was a highly sensitive, accurate and rapid method for detecting the macrolide resistance-associated mutations and it could provide earlier and more drug-resistant information for M. pneumoniae research and the clinical therapy.
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Affiliation(s)
- Dongxing Guo
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Wenjuan Hu
- Department of Paediatrics, Civil Aviation General Hospital, Beijing, China
| | - Baoping Xu
- Department of Respiratory, Beijng Children's Hospital, Capital Medical University, No. 56 South Lishi Road, Xicheng District, Beijing, China
| | - Jingyi Li
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Dan Li
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Shaogang Li
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Zhaoyong Wu
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Ran Wei
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Xiujun Tian
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China
| | - Kunling Shen
- Department of Respiratory, Beijng Children's Hospital, Capital Medical University, No. 56 South Lishi Road, Xicheng District, Beijing, China.
| | - Deli Xin
- Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong an Road, Xicheng District, Beijing, China.
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