title: Pathogenesis and association of Mycoplasma pneumoniae infection with cardiac and hepatic damage.
abstract: The aim of this study was to investigate the pathogenesis of Mycoplasma pneumoniae (MP) infection and its association with cardiac and hepatic damage. Between March 2013 and March 2014, 59 children with MP pneumonia (MPP) and 30 healthy children were enrolled. Serum titers of TLR4, T cell immunoglobulin and mucin-domain (TIM) 3, IL-10, TNF-α, and IFN-γ were measured both in children with MPP and healthy children. Additionally, MP-specific antibody titer and creatine kinase-MB (CK-MB), and alanine transaminase (ALT) titers were measured in patients with MPP. There were significant differences between the MPP patients and healthy controls in titers of TIM1 (P < 0.01), TLR2 (P = 0.028), TLR4 (P = 0.019), IL-10 (P < 0.01), TNF-α (P < 0.01) and IFN-γ (P < 0.01); however, no significant difference was found in TIM3 titers (P = 0.8181). TIM1 was correlated with CK-MB (P = 0.025), whereas both TIM1 and TLR2 titers were correlated with MP-specific antibody titers (P < 0.001; P = 0.003, respectively). Additionally, there were correlations between ALT, TIM3, and TLR2 titers (P = 0.025; P = 0.037, respectively). The titers of TIM1 were significantly higher in patients with cardiac damage (P = 0.007) than in those without it, whereas the titers of TLR2 were significantly higher in patients with hepatic damage (P = 0.026) than in those without it. TLR2, TLR4 and TIM1 may be involved in the process of MP infection. Additionally, TLR2, TLR4, TIM1 and TIM3 may play particular roles in the pathogenesis of MPP-associated cardiac and hepatic damage.
authors.affiliation: Department of Pediatrics, Jinan Maternity and Child Care Hospital, Shandong, 250001, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Fan
authors.affiliation: Department of Pediatrics, People's Hospital of Dezhou, Shandong, 253014, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Meng
authors.affiliation: Department of Pediatrics, Jinan Maternity and Child Care Hospital, Shandong, 250001, China.
authors.forename: Peijie
authors.initials: P
authors.lastname: Li
authors.affiliation: Department of Pediatrics, Jinan Maternity and Child Care Hospital, Shandong, 250001, China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Pediatrics, Jinan Maternity and Child Care Hospital, Shandong, 250001, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Pediatrics, Jinan Maternity and Child Care Hospital, Shandong, 250001, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yan
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D002648:Child; D002675:Child, Preschool; D005260:Female; D000072597:Hepatitis A Virus Cellular Receptor 2; D006801:Humans; D007223:Infant; D016753:Interleukin-10 / Q000097:blood; D008099:Liver / Q000276:immunology*; D008297:Male; D008565:Membrane Proteins / Q000097:blood; D009177:Mycoplasma pneumoniae / Q000502:physiology*; D009206:Myocardium / Q000276:immunology*; D011019:Pneumonia, Mycoplasma / Q000097:blood / Q000235:genetics / Q000276:immunology* / Q000382:microbiology; D014409:Tumor Necrosis Factor-alpha / Q000097:blood
chemical_list: D000907:Antibodies, Bacterial; C448908:HAVCR2 protein, human; D000072597:Hepatitis A Virus Cellular Receptor 2; C508609:IL10 protein, human; D008565:Membrane Proteins; C439524:TNF protein, human; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10
keywords: Mycoplasma pneumoniae; cardiac and hepatic damages