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Rêgo JL, de Lima Santana N, Machado PRL, Ribeiro-Alves M, de Toledo-Pinto TG, Castellucci LC, Moraes MO. Whole blood profiling of leprosy type 1(reversal) reactions highlights prominence of innate immune response genes. BMC Infect Dis 2018; 18:422. [PMID: 30143000 PMCID: PMC6109344 DOI: 10.1186/s12879-018-3348-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 08/20/2018] [Indexed: 12/02/2022] Open
Abstract
Background The major factors contributing for nerve damage and permanent disabilities in leprosy are type 1 or reversal reactions (RR) and type 2 or erythema nodosum leprosum (ENL). Gene profiling of leprosy reactions have shown that different pathways are activated during the course of reactions, which is consistent with the exacerbated immune response exhibited by these patients. Methods We used qPCR to screen a panel of 90 genes related to the immune response in leprosy in RNA-derived peripheral leukocytes of patients with (N = 94) and without leprosy reactions (N = 57) in order to define expression signatures correlated to RR or ENL. Results Our results show that there is a marked signature for RR in the blood, comprising genes mostly related to the innate immune responses, including type I IFN components, autophagy, parkins and Toll like receptors. On the other hand, only Parkin was differentially expressed in the ENL group. Conclusions The data put together corroborates previous work that brings evidence that an acute uncontrolled exacerbated immune response designed to contain the spread of M. leprae antigens might be cause of RR pathogenesis. Identifying a blood profile useful to predict leprosy reactions prior to its development might help to reduce the morbidity associated to this disabling disease.
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Affiliation(s)
- Jamile Leão Rêgo
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
| | - Nadja de Lima Santana
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
| | - Paulo Roberto Lima Machado
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, Salvador, Brazil.,Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
| | | | | | - Léa Cristina Castellucci
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, Salvador, Brazil. .,Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil. .,Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Rua João das Botas, S/N°, 5° andar, Salvador, Bahia, 40.110-160, Brazil.
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van Rensburg IC, du Toit L, Walzl G, du Plessis N, Loxton AG. Decreased neutrophil-associated miRNA and increased B-cell associated miRNA expression during tuberculosis. Gene 2018; 655:35-41. [PMID: 29477867 DOI: 10.1016/j.gene.2018.02.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/16/2018] [Accepted: 02/21/2018] [Indexed: 12/11/2022]
Abstract
MicroRNAs are short non-coding RNAs that regulate gene expression by binding to, and suppressing the expression of genes. Research show that microRNAs have potential to be used as biomarkers for diagnosis, treatment response and can be used for therapeutic interventions. Furthermore, microRNA expression has effects on immune cell functions, which may lead to disease. Considering the important protective role of neutrophils and B-cells during M.tb infection, we evaluated the expression of microRNAs, known to alter function of these cells, in the context of human TB. We utilised real-time PCR to evaluate the levels of microRNA transcripts in the peripheral blood of TB cases and healthy controls. We found that neutrophil-associated miR-197-3p, miR-99b-5p and miR-191-5p transcript levels were significantly lower in TB cases. Additionally, B-cell-associated miR-320a, miR-204-5p, miR331-3p and other transcript levels were higher in TB cases. The miRNAs differentially expressed in neutrophils are predominantly implicated in signalling pathways leading to cytokine productions. Here, the decreased expression in TB cases may imply a lack of suppression on signalling pathways, which may lead to increased production of pro-inflammatory cytokines such as interferon-gamma. Furthermore, the miRNAs differentially expressed in B-cells are mostly involved in the induction/suppression of apoptosis. Further functional studies are however required to elucidate the significance and functional effects of changes in the expression of these microRNAs.
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Affiliation(s)
- I C van Rensburg
- SA MRC Centre for TB Research, DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa
| | - L du Toit
- SA MRC Centre for TB Research, DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa
| | - G Walzl
- SA MRC Centre for TB Research, DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa
| | - N du Plessis
- SA MRC Centre for TB Research, DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa
| | - A G Loxton
- SA MRC Centre for TB Research, DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 241, Cape Town 8000, South Africa.
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Yuan Y, You Y, Wen Y, Liu J, Li H, Zhang Y, Wu N, Liu S, Zhang S, Chen J, Ai J, Zhang W, Zhang Y. Identification of novel genetic loci GAL3ST4 and CHGB involved in susceptibility to leprosy. Sci Rep 2017; 7:16352. [PMID: 29180661 PMCID: PMC5703986 DOI: 10.1038/s41598-017-16422-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/30/2017] [Indexed: 01/26/2023] Open
Abstract
Leprosy has long been thought to have a strong genetic component, and so far, only positional cloning and genomewide association studies have been used to study the genetic susceptibility to leprosy,while whole exome sequencing (WES) approach has not yet been applied. In this study, we used WES approach on four leprosy patients and four healthy control relatives from two leprosy families. We found three new susceptible loci of leprosy, one in GAL3ST4 and two in CHGB. We went on to validate the findings of WES using 151 leprosy cases and 226 healthy controls by Sanger sequencing. Stratified by gender, GAL3ST4 was found to be the susceptible gene only for the female population, and CHGB48 and CHGB23 were susceptibile to leprosy for the male population, respectively). Moreover, the gene expression levels of the three susceptible loci were measured by real-time PCR after the stimulation by M. leprae antigens in the PBMC (peripheral blood mononuclear cells) of 69 healthy people. The results showed that the female subjects with high frequent genotype in GAL3ST4 had a fivefold elevated expression. We suggest the polymorphisms in GAL3ST4 in different population are associated with increased risk of leprosy.
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Affiliation(s)
- Youhua Yuan
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Clinical laboratory, Henan Provincial People's Hospital, Zhengzhou, China
| | - Yuangang You
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
| | - Yan Wen
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Jian Liu
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Huanying Li
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yumeng Zhang
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Nan Wu
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shuang Liu
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shanshan Zhang
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jiazhen Chen
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jingwen Ai
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wenhong Zhang
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ying Zhang
- Key Laboratory of Medical Virology, Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China. .,Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA.
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Santana NDL, Rêgo JL, Oliveira JM, Almeida LFD, Braz M, Machado LMM, Machado PRL, Castellucci LC. Polymorphisms in genes TLR1, 2 and 4 are associated with differential cytokine and chemokine serum production in patients with leprosy. Mem Inst Oswaldo Cruz 2017; 112:260-268. [PMID: 28327786 PMCID: PMC5354609 DOI: 10.1590/0074-02760160366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 12/23/2016] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Leprosy or hansen's disease is a spectral disease whose clinical forms mostly depends on host's immune and genetic factors. Different Toll-like receptors (TLR) variants have been described associated with leprosy, but with some lack of replication across different populations. OBJECTIVES To evaluate the role of polymorphisms in genes TLR1, TLR2 and TLR4 and susceptibility to leprosy in a genetic case control study; to verify the association between genotypes of these markers and the immunological profile in the serum of patients with leprosy. METHODS Pre-designed TaqMan® assays were used to genotype markers at TLR1 (rs4833095, rs5743551), TLR2 (rs7656411, rs3804099) and TLR4 (rs1927914, rs1927911). A panel of cytokines and chemokines was accessed by enzime-linked immunosorbent assay (ELISA) test in the serum of a subgroup of patients with and without leprosy reactions. FINDINGS Our results show an association between the T allele of rs3804099 at the TLR2 gene and increased risk for leprosy per se [Odds ratio (OR) = 1.296, p = 0,022]. In addition, evaluating the association between different genotypes of the TLR1, 2 and 4 markers and cytokine/chemokine serological levels, IL-17 appears as an immunological marker regulated by the polymorphism of the three TLR genes evaluated, whereas different TLR1 genotypes were associated with differential production of IL-12p40 and MCP-1(CCL2). Furthermore, other relevant serum markers such as CXCL-10 and IL-6 seemed to be regulated by TLR2 variants and IL-1β was related to TLR4 genotypes. MAIN CONCLUSIONS All together our data points that the tested TLR markers may have a regulatory role in the immunity against Mycobacterium leprae, by driving the host's production of key cytokines and chemokines involved in the pathogenesis of this disease.
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Affiliation(s)
- Nadja de Lima Santana
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | - Jamile Leão Rêgo
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | - Joyce Moura Oliveira
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil
| | - Lucas Frederico de Almeida
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil
| | - Marcos Braz
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | | | - Paulo Roberto Lima Machado
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, Salvador, BA, Brasil.,Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | - Léa Cristina Castellucci
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, Salvador, BA, Brasil.,Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
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Molecular Pathogenesis of Leprosy. CURRENT TROPICAL MEDICINE REPORTS 2016. [DOI: 10.1007/s40475-016-0094-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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