1
|
Thiam F, Diop G, Coulonges C, Derbois C, Thiam A, Diouara AAM, Mbaye MN, Diop M, Nguer CM, Dieye Y, Mbengue B, Zagury JF, Deleuze JF, Dieye A. An elevated level of interleukin-17A in a Senegalese malaria cohort is associated with rs8193038 IL-17A genetic variant. BMC Infect Dis 2024; 24:275. [PMID: 38438955 PMCID: PMC10910704 DOI: 10.1186/s12879-024-09149-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 02/17/2024] [Indexed: 03/06/2024] Open
Abstract
Malaria infection is a multifactorial disease partly modulated by host immuno-genetic factors. Recent evidence has demonstrated the importance of Interleukin-17 family proinflammatory cytokines and their genetic variants in host immunity. However, limited knowledge exists about their role in parasitic infections such as malaria. We aimed to investigate IL-17A serum levels in patients with severe and uncomplicated malaria and gene polymorphism's influence on the IL-17A serum levels. In this research, 125 severe (SM) and uncomplicated (UM) malaria patients and 48 free malaria controls were enrolled. IL-17A serum levels were measured with ELISA. PCR and DNA sequencing were used to assess host genetic polymorphisms in IL-17A. We performed a multivariate regression to estimate the impact of human IL-17A variants on IL-17A serum levels and malaria outcomes. Elevated serum IL-17A levels accompanied by increased parasitemia were found in SM patients compared to UM and controls (P < 0.0001). Also, the IL-17A levels were lower in SM patients who were deceased than in those who survived. In addition, the minor allele frequencies (MAF) of two IL-17A polymorphisms (rs3819024 and rs3748067) were more prevalent in SM patients than UM patients, indicating an essential role in SM. Interestingly, the heterozygous rs8193038 AG genotype was significantly associated with higher levels of IL-17A than the homozygous wild type (AA). According to our results, it can be concluded that the IL-17A gene rs8193038 polymorphism significantly affects IL-17A gene expression. Our results fill a gap in the implication of IL-17A gene polymorphisms on the cytokine level in a malaria cohort. IL-17A gene polymorphisms also may influence cytokine production in response to Plasmodium infections and may contribute to the hyperinflammatory responses during severe malaria outcomes.
Collapse
Affiliation(s)
- Fatou Thiam
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal.
| | - Gora Diop
- Departement de Biologie Animale, Faculte Des Sciences Et Techniques, Unite Postulante de Biologie GenetiqueGenomique Et Bio-Informatique (G2B), Universite Cheikh Anta DIOP, Avenue Cheikh Anta DIOP, Dakar, BP: 5005, Senegal
- Pole d'Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, 36, Avenue Pasteur, Dakar, BP: 220, Senegal
| | - Cedric Coulonges
- Equipe GBA «GenomiqueBioinformatique & Applications», Conservatoire National Des Arts Et Metiers, 292, Rue Saint Martin, Paris Cedex 03, Paris, 75141, France
| | - Celine Derbois
- Centre National de Recherche en Génétique Humaine (CNRGH), Institut de Biologie François Jacob, 2 Rue Gaston Crémieux, CP 5721, Evry Cedex, 91057, France
| | - Alassane Thiam
- Pole d'Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, 36, Avenue Pasteur, Dakar, BP: 220, Senegal
| | - Abou Abdallah Malick Diouara
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal
| | - Mame Ndew Mbaye
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal
| | - Mamadou Diop
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal
| | - Cheikh Momar Nguer
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal
| | - Yakhya Dieye
- Groupe de Recherche Biotechnologies Appliquees & Bioprocedes Environnementaux, Ecole Superieure Polytechnique, Universite Cheikh Anta Diop de Dakar, Corniche Ouest, Dakar-Fann, BP: 5085, Senegal
- Pôle de Microbiologie, Institut Pasteur de Dakar, 36 Avenue Pasteur, Dakar, BP 220, Senegal
| | - Babacar Mbengue
- Service d'Immunologie, Faculté de Médecine, de Pharmacie Et d'Odontostomatologie, Université Cheikh Anta DIOP, Avenue Cheikh Anta DIOP, Dakar, BP: 5005, Senegal
| | - Jean-Francois Zagury
- Equipe GBA «GenomiqueBioinformatique & Applications», Conservatoire National Des Arts Et Metiers, 292, Rue Saint Martin, Paris Cedex 03, Paris, 75141, France
| | - Jean-Francois Deleuze
- Centre National de Recherche en Génétique Humaine (CNRGH), Institut de Biologie François Jacob, 2 Rue Gaston Crémieux, CP 5721, Evry Cedex, 91057, France
| | - Alioune Dieye
- Service d'Immunologie, Faculté de Médecine, de Pharmacie Et d'Odontostomatologie, Université Cheikh Anta DIOP, Avenue Cheikh Anta DIOP, Dakar, BP: 5005, Senegal
| |
Collapse
|
2
|
Ndiaye M, Diop G, Derbois C, Spadoni JL, Noirel J, Medina-Santos R, Coulonges C, Torres M, Dieye A, Sembene M, Deleuze JF, Toledano A, Dem A, Zagury JF, Le Clerc S. Gene expression profiling of peripheral blood mononuclear cells from women with cervical lesions reveals new markers of cancer. Oncol Rep 2023; 49:118. [PMID: 37114528 DOI: 10.3892/or.2023.8555] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 11/03/2022] [Indexed: 04/29/2023] Open
Abstract
Cervical cancer (CC) is a multifactorial disease of which human papillomavirus (HPV) is the main etiological agent. Despite cervical Pap smear screening and anti‑HPV vaccination, CC remains a major public health issue. Identification of specific gene expression signatures in the blood could allow better insight into the immune response of CC and could provide valuable information for the development of novel biomarkers. The present study performed a transcriptomic analysis of peripheral blood mononuclear cells (PBMCs) from Senegalese patients with CC (n=31), low‑grade cervical intraepithelial neoplasia (CIN1; n=27) and from healthy control (CTR) subjects (n=29). Individuals in the CIN1 and CTR groups exhibited similar patterns in gene expression. A total of 182 genes were revealed to be differentially expressed in patients with CC compared with individuals in the CIN1 and CTR groups. The IL1R2, IL18R1, MMP9 and FKBP5 genes were the most upregulated, whereas the T‑cell receptor α gene TRA was the most downregulated in the CC group compared with in the CIN1 and CTR groups. The pathway enrichment analysis of the differentially expressed genes revealed pathways directly and indirectly linked to inflammation. To the best of our knowledge, the present study is the first large transcriptomic study on CC performed using PBMCs from African women; the results revealed the involvement of genes and pathways related to inflammation, most notably the IL‑1 pathway, and the involvement of downregulation of the T‑cell receptor α, a key component of the immune response. Several of the stated genes have already been reported in other cancer studies as putative blood biomarkers, thus reinforcing the requirement for deeper investigation. These findings may aid in the development of innovative clinical biomarkers for CC prevention and should be further replicated in other populations.
Collapse
Affiliation(s)
- Moussa Ndiaye
- Department of Animal Biology, Sciences and Techniques Faculty, Cheikh Anta DIOP University, 10700 Dakar, Senegal
| | - Gora Diop
- Department of Animal Biology, Sciences and Techniques Faculty, Cheikh Anta DIOP University, 10700 Dakar, Senegal
| | - Celine Derbois
- National Research Center for Human Genetics (CNRGH), Genomics Institute‑CEA, 91057 Evry, France
| | - Jean-Louis Spadoni
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Josselin Noirel
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Raissa Medina-Santos
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Cedric Coulonges
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Magali Torres
- Aix Marseille University, INSERM, Laboratory TAGC, UMR U1090, 13288 Marseille, France
| | - Alioune Dieye
- Immunology Service, Medicine University of Pharmacy and Odontology, Cheikh Anta DIOP University, 10700 Dakar, Senegal
| | - Mbacke Sembene
- Department of Animal Biology, Sciences and Techniques Faculty, Cheikh Anta DIOP University, 10700 Dakar, Senegal
| | - Jean-François Deleuze
- National Research Center for Human Genetics (CNRGH), Genomics Institute‑CEA, 91057 Evry, France
| | - Alain Toledano
- Integrative Health Chair, National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Ahmadou Dem
- Cancerology Service, Aristide Le Dantec Hospital, Joliot‑Curie Institute, 10200 Dakar, Senegal
| | - Jean-François Zagury
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| | - Sigrid Le Clerc
- Genomics Laboratory, Bio‑informatics and Molecular Chemistry (Laboratory no. EA7528), National Art and Crafts Conservatory, HESAM University, 75003 Paris, France
| |
Collapse
|
3
|
Thiam A, Nisar S, Adjemout M, Gallardo F, Ka O, Mbengue B, Diop G, Dieye A, Marquet S, Rihet P. ATP2B4 regulatory genetic variants are associated with mild malaria. Malar J 2023; 22:68. [PMID: 36849945 PMCID: PMC9972758 DOI: 10.1186/s12936-023-04503-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 02/18/2023] [Indexed: 03/01/2023] Open
Abstract
BACKGROUND Genome-wide association studies have identified ATP2B4 as a severe malaria resistance gene. Recently, 8 potential causal regulatory variants have been shown to be associated with severe malaria. METHODS Genotyping of rs10900585, rs11240734, rs1541252, rs1541253, rs1541254, rs1541255, rs10751450, rs10751451 and rs10751452 was performed in 154 unrelated individuals (79 controls and 75 mild malaria patients). rs10751450, rs10751451 and rs10751452 were genotyped by Taqman assays, whereas the fragment of the ATP2B4 gene containing the remaining SNPs was sequenced. Logistic regression analysis was used to assess the association between the SNPs and mild malaria. RESULTS The results showed that mild malaria was associated with rs10900585, rs11240734, rs1541252, rs1541253, rs1541254, rs1541255, rs10751450, rs10751451 and rs10751452. The homozygous genotypes for the major alleles were associated with an increased risk of mild malaria. Furthermore, the haplotype containing the major alleles and that containing the minor alleles were the most frequent haplotypes. Individuals with the major haplotypes had a significantly higher risk of mild malaria compared to the carriers of the minor allele haplotype. CONCLUSIONS ATP2B4 polymorphisms that have been associated with severe malaria are also associated with mild malaria.
Collapse
Affiliation(s)
- Alassane Thiam
- grid.418508.00000 0001 1956 9596Unité d’Immunogénétique, Institut Pasteur de Dakar, Dakar, Senegal
| | - Samia Nisar
- grid.5399.60000 0001 2176 4817Aix Marseille Univ, INSERM, TAGC, MarMaRa Institute, Marseille, France ,grid.444997.30000 0004 1761 3137Sardar Bahadur Khan Women’s University, Quetta, 1800 Balochistan Pakistan
| | - Mathieu Adjemout
- grid.5399.60000 0001 2176 4817Aix Marseille Univ, INSERM, TAGC, MarMaRa Institute, Marseille, France
| | - Frederic Gallardo
- grid.5399.60000 0001 2176 4817Aix Marseille Univ, INSERM, TAGC, MarMaRa Institute, Marseille, France
| | - Oumar Ka
- grid.8191.10000 0001 2186 9619Service d’Immunologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Babacar Mbengue
- grid.8191.10000 0001 2186 9619Service d’Immunologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Gora Diop
- grid.418508.00000 0001 1956 9596Unité d’Immunogénétique, Institut Pasteur de Dakar, Dakar, Senegal
| | - Alioune Dieye
- grid.8191.10000 0001 2186 9619Service d’Immunologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Sandrine Marquet
- Aix Marseille Univ, INSERM, TAGC, MarMaRa Institute, Marseille, France.
| | - Pascal Rihet
- Aix Marseille Univ, INSERM, TAGC, MarMaRa Institute, Marseille, France.
| |
Collapse
|
4
|
Thiam F, Diop G, Coulonges C, Derbois C, Mbengue B, Thiam A, Nguer CM, Zagury JF, Deleuze JF, Dieye A. G6PD and HBB polymorphisms in the Senegalese population: prevalence, correlation with clinical malaria. PeerJ 2022; 10:e13487. [PMID: 35811813 PMCID: PMC9266585 DOI: 10.7717/peerj.13487] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 05/03/2022] [Indexed: 01/24/2023] Open
Abstract
Background Host genetic factors contribute to the variability of malaria phenotypes and can allow a better understanding of mechanisms involved in susceptibility and/or resistance to Plasmodium falciparum infection outcomes. Several genetic polymorphisms were reported to be prevalent among populations living in tropical malaria-endemic regions and induce protection against malaria. The present study aims to investigate the prevalence of HBB (chr11) and G6PD (chrX) deficiencies polymorphisms among Senegalese populations and their associations with the risk for severe Plasmodium falciparum malaria occurrence. Methods We performed a retrospective study with 437 samples, 323 patients recruited in hospitals located in three different endemic areas where malaria episodes were confirmed and 114 free malaria controls. The patients enrolled were classified into two groups: severe malaria (SM) (153 patients) and uncomplicated malaria (UM) (170 patients). PCR and DNA sequencing assessed host genetic polymorphisms in HBB and G6PD. Using a multivariate regression and additive model, estimates of the impact of human HBB and G6PD polymorphisms on malaria incidence were performed. Results Six frequent SNPs with minor allele frequencies (MAF) > 3% were detected in the HBB gene (rs7946748, rs7480526, rs10768683, rs35209591, HbS (rs334) and rs713040) and two in the G6PD gene (rs762515 and rs1050828 (G6PD-202 G > A). Analysis of selected HbS polymorphism showed significant association with protective effect against severe malaria with a significant p-value = 0.033 (OR 0.38, 95% CI [0.16-0.91]) for SM vs. UM comparison. Surprisingly, our study did not identify the protective effect of variant HbC polymorphism against severe malaria. Finally, we found some of the polymorphisms, like HbS (rs334), are associated with age and biological parameters like eosinophils, basophils, lymphocytes etc. Conclusion Our data report HBB and G6PD polymorphisms in the Senegalese population and their correlation with severe/mild malaria and outcome. The G6PD and HBB deficiencies are widespread in West Africa endemic malaria regions such as The Gambia, Mali, and Burkina Faso. The study shows the critical role of genetic factors in malaria outcomes. Indeed, genetic markers could be good tools for malaria endemicity prognosis.
Collapse
Affiliation(s)
- Fatou Thiam
- Groupe de Recherche Biotechnologie Appliquée et Bioprocédés Environnementaux (GRBA-BE), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Département de Génie Chimique et Biologie Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, Dakar Fann, Dakar, Sénégal
| | - Gora Diop
- Unité Postulante de Biologie Génétique, Génomique et Bio-informatique (G2B), Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta DIOP, Avenue Cheikh Anta DIOP, Dakar Fann, Dakar, Sénégal,Pole d’Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Cedric Coulonges
- Equipe GBA «Génomique, Bioinformatique & Applications », Conservatoire National des Arts et Métiers, Paris, France
| | - Céline Derbois
- CEA, Centre National de Recherche en Génomique Humaine, Université Paris-Saclay, Evry, France
| | - Babacar Mbengue
- Service d’Immunologie, Faculté de Médecine, de Pharmacie et d’Odontostomatologie, Université Cheikh Anta DIOP, Dakar, Sénégal
| | - Alassane Thiam
- Pole d’Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Cheikh Momar Nguer
- Groupe de Recherche Biotechnologie Appliquée et Bioprocédés Environnementaux (GRBA-BE), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Département de Génie Chimique et Biologie Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, Dakar Fann, Dakar, Sénégal
| | - Jean Francois Zagury
- Equipe GBA «Génomique, Bioinformatique & Applications », Conservatoire National des Arts et Métiers, Paris, France
| | - Jean-Francois Deleuze
- CEA, Centre National de Recherche en Génomique Humaine, Université Paris-Saclay, Evry, France
| | - Alioune Dieye
- Service d’Immunologie, Faculté de Médecine, de Pharmacie et d’Odontostomatologie, Université Cheikh Anta DIOP, Dakar, Sénégal
| |
Collapse
|
5
|
Diouf D, Diop G, Fall C, Sarr S, Diarra CAT, Ngom AI, Ka S, Lo S, Faye O, Dem A. The Association of Molecular Biomarkers in the Diagnosis of Cervical Pre-Cancer and Cancer and Risk Factors in Senegalese. Asian Pac J Cancer Prev 2020; 21:3221-3227. [PMID: 33247678 PMCID: PMC8033140 DOI: 10.31557/apjcp.2020.21.11.3221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 05/13/2020] [Indexed: 12/24/2022] Open
Abstract
Background: Cervical intraepithelial neoplasia (CIN) grading is subjective and affected by substantial rates of discordance among pathologists. Although recent studies have suggested that p16INK4a may be a useful surrogate biomarker of cervical neoplasia, Ki-67 and human papillomavirus testing have also been shown to be useful in detecting neoplasia. The purpose of this study was to determine the expression of p16INK4a and Ki-67 in cervical neoplasia and its correlations with cofactors. Methods: The study involved 69 patients with and without cervical neoplasia who underwent colposcopic directed biopsy. On each patient, two samples were taken; the first was used for immunohistochemistry and the second for molecular testing, using HPV16and18 genotyping Real-Time PCR Kit. Results: The study revealed the expression level of p16INK4a and Ki-67 in a descending order, from invasive squamous cell carcinoma (SCC), CIN2/3, CIN1 and non-dysplastic lesions. Correlations showed an association between the staining of p16NK4a and Ki-67 with the increase of age (OR: 1.79 (95%IC: 0.49 – 6.55), p = 0.037) and marital status (OR: 0.17 (95%IC: 0.04 – 0.68), p = 0.003). We found that the expressions of p16INK4a and Ki-67 were significantly different between invasive SCC vs non-dysplasia (OR: 44.57 (95%IC: 4.91 – 403.91), p<0.0001). The study showed significant correlation between HPV 16and18 infection with p16 INK4a and Ki-67 expression (OR: 0.13 (95%IC: 0.03 – 0.52), p<0.0001). Strong expression of p16INK4a and Ki-67 were observed in invasive squamous cell carcinoma, moderate staining was found in CIN2/3, weak staining in CIN1 and normal histology. Conclusion: Our findings indicate that p16INK4a and Ki-67 expressions associated strongly with cervical pathology. Therefore, p16/Ki-67 could be considered as a suitable biomarker for cervical cancer screening, particularly in HPV-based screening programs.
Collapse
Affiliation(s)
- Dominique Diouf
- Laboratory of Cytogenetic and Reproductive Biology, Hospital Aristide-Le-Dantec, Pasteur Avenue, Dakar, Senegal.,Laboratory of Anatomy and Pathology, Principal Military Hospital of Dakar, Nelson Mandela Avenue, Dakar, Senegal.,Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal
| | - Gora Diop
- Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal.,Cheikh Anta DIOP University, Department of Animal Biology, Faculty of Science and Technology, Postulant Unit of Genetic, Genomic and Bioinformatic of Infectious Diseases and Cancer, Cheikh Anta Diop Avenue, Dakar, Senegal.,Institut Pasteur Dakar, Pole d'immunophysiopathologie des maladies infectieuses (Pole IMI), Pasteur Avenue, Dakar, Senegal
| | - Cheikh Fall
- Institut Pasteur Dakar, Pole de Virologie, PO Box 220. 36, Pasteur Avenue, Dakar, Senegal
| | - Souleymane Sarr
- Laboratory of Anatomy and Pathology, Principal Military Hospital of Dakar, Nelson Mandela Avenue, Dakar, Senegal
| | - Cheikh Ahmadou Tidian Diarra
- Hopital Aristide LeDantec, Service de Cancerologie, Institut-Juliot-Curie, Pasteur Avenue, PO Box 3001, Dakar, Senegal
| | - Aminata Issa Ngom
- Laboratory of Cytogenetic and Reproductive Biology, Hospital Aristide-Le-Dantec, Pasteur Avenue, Dakar, Senegal
| | - Sidy Ka
- Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal.,Hopital Aristide LeDantec, Service de Cancerologie, Institut-Juliot-Curie, Pasteur Avenue, PO Box 3001, Dakar, Senegal
| | - Seynabou Lo
- Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal
| | - Oumar Faye
- Laboratory of Cytogenetic and Reproductive Biology, Hospital Aristide-Le-Dantec, Pasteur Avenue, Dakar, Senegal.,Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal
| | - Ahmadou Dem
- Cancer Studies and Research Group in Senegal (GERCS), FMPO, Cheikh Anta DIOP University, Cheikh Anta Diop Avenue, Dakar, Senegal.,Hopital Aristide LeDantec, Service de Cancerologie, Institut-Juliot-Curie, Pasteur Avenue, PO Box 3001, Dakar, Senegal
| |
Collapse
|
6
|
Diouf D, Diop G, Diarra CAT, Ngom AI, Niane K, Ndiaye M, Ka S, Faye O, Dem A. Systematic screening for cervical cancer in Dakar region: prevalence and correlation with biological and socio-demographic parameters. Infect Agent Cancer 2020; 15:24. [PMID: 32336981 PMCID: PMC7178929 DOI: 10.1186/s13027-020-00290-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 04/08/2020] [Indexed: 12/31/2022] Open
Abstract
Background Cervical cancer is a major public health problem. In 2018, globally 569,847 cervical cancer were diagnosed and 311,000 deaths were projected due to this preventable disease. Worldwide, therefore, the cervical cancer disease ranks as the fourth most frequently diagnosed cancer and the fourth leading cause of cancer death in women in 2018. The high rate of dysplasia in Senegal and the absence of well-organized screening programs informed this study, which aims to determine the prevalence of cervical dysplasia and its relationship to biological and socio-demographic characteristics. Methods This study is based on 1000 conventional smears collected during routine cervical cancer screening at the Gaspard Camara Health Center and the Histology - Embryology and Cytogenetics Laboratory of the Cheikh Anta DIOP University in Dakar. The smears were read according to the Bethesda and Richart systems. However, all data were returned to the Bethesda system using the correspondence table between the different classifications of squamous cell lesions of the cervix. Some of the patients with abnormal smears had colposcopy and if necessary a biopsy. Other patients with low-grade lesions were recommended to have their smears resumed in 6 months or 1 year later. Results Cytological analysis was performed for 1000 patients aged 16 to 82 years (mean age = 41 ± 11.16). Among these, 176 patients had abnormal smears, 23 had Atypical Squamous Cells of Undetermined Significance (ASCUS), 143 had a low-grade lesion, 9 had a high-grade lesion and 1 had carcinoma. Among the remaining 822 patients, cytological analysis revealed no suspected malignant lesions, but 623 among them had dystrophy and 2 were unsatisfactory. Among patients with abnormal smears, 104 patients (23 ASCUS + 71 low grade + 9 high grade + 1 carcinoma) had performed colposcopy, 40 of whom had normal colposcopy and 64 had abnormalities. Sixty-four (64) biopsies were performed. Four (4) were not satisfactory. However, for 26/60 biopsies, the histology was normal, 21/60 had a low grade, 11 displayed a high grade and only 2 had carcinoma. Among the 176 patients with abnormal smears, 72 low-grade patients had undergone cytological examination 6 months to 1 year later to determine the persistence, regression or progression of low-grade dysplasia. During follow-up, persistence was observed in 25% (n = 18) of cases, progression to High-grade squamous intraepithelial lesion (HSIL) was detected in 2.78% (n = 2), while 72.22% (n = 52) of the patients experienced regression. Conclusion In this study, the prevalence of abnormal smear was 17.60% for cytology. Meanwhile, the Colposcopy and histology confirmed just 3.40%. These results underline the interest and need for a review of the discrepancies observed between pathologists.
Collapse
Affiliation(s)
- Dominique Diouf
- 1Laboratory of cytogenetic and reproductive biology, Hopital Aristide-Le-Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal.,Institut-Juliot-Curie, Hospital Aristide Le Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal.,Laboratory of anatomy and pathology, Principal military Hospital of Dakar, Nelson Mandela Avenue, PO Box 3006, Dakar, Senegal.,Cancer Studies and Research Group in Senegal (GERCS), Cheikh Anta Diop Avenue, PO 5005, Dakar, Senegal
| | - Gora Diop
- Cancer Studies and Research Group in Senegal (GERCS), Cheikh Anta Diop Avenue, PO 5005, Dakar, Senegal.,5Department of Animal Biology, Faculty of Science and Technology, Postulant Unit of Genetic, Genomic and Bioinformatic of Infectious Diseases, Cheikh Anta DIOP University, PO Box 55, Cheikh Anta Diop Avenue, Dakar, Senegal.,6Immunology & Biology of infectious diseases Unit, Institut Pasteur Dakar, 36, avenue Pasteur, PO Box 220, Dakar, Senegal
| | | | - Aminata Issa Ngom
- 1Laboratory of cytogenetic and reproductive biology, Hopital Aristide-Le-Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal
| | - Khadija Niane
- 6Immunology & Biology of infectious diseases Unit, Institut Pasteur Dakar, 36, avenue Pasteur, PO Box 220, Dakar, Senegal
| | - Moussa Ndiaye
- 6Immunology & Biology of infectious diseases Unit, Institut Pasteur Dakar, 36, avenue Pasteur, PO Box 220, Dakar, Senegal
| | - Sidy Ka
- Institut-Juliot-Curie, Hospital Aristide Le Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal.,Cancer Studies and Research Group in Senegal (GERCS), Cheikh Anta Diop Avenue, PO 5005, Dakar, Senegal
| | - Oumar Faye
- 1Laboratory of cytogenetic and reproductive biology, Hopital Aristide-Le-Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal.,Laboratory of anatomy and pathology, Principal military Hospital of Dakar, Nelson Mandela Avenue, PO Box 3006, Dakar, Senegal.,Cancer Studies and Research Group in Senegal (GERCS), Cheikh Anta Diop Avenue, PO 5005, Dakar, Senegal
| | - Ahmadou Dem
- Institut-Juliot-Curie, Hospital Aristide Le Dantec, Pasteur Avenue, PO Box 3001, Dakar, Senegal.,Laboratory of anatomy and pathology, Principal military Hospital of Dakar, Nelson Mandela Avenue, PO Box 3006, Dakar, Senegal
| |
Collapse
|
7
|
Thiam A, Sanka M, Ndiaye Diallo R, Torres M, Mbengue B, Nunez NF, Thiam F, Diop G, Victorero G, Nguyen C, Dieye A, Rihet P. Gene expression profiling in blood from cerebral malaria patients and mild malaria patients living in Senegal. BMC Med Genomics 2019; 12:148. [PMID: 31666081 PMCID: PMC6821028 DOI: 10.1186/s12920-019-0599-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 04/19/2019] [Accepted: 10/09/2019] [Indexed: 01/06/2023] Open
Abstract
Background Plasmodium falciparum malaria remains a major health problem in Africa. The mechanisms of pathogenesis are not fully understood. Transcriptomic studies may provide new insights into molecular pathways involved in the severe form of the disease. Methods Blood transcriptional levels were assessed in patients with cerebral malaria, non-cerebral malaria, or mild malaria by using microarray technology to look for gene expression profiles associated with clinical status. Multi-way ANOVA was used to extract differentially expressed genes. Network and pathways analyses were used to detect enrichment for biological pathways. Results We identified a set of 443 genes that were differentially expressed in the three patient groups after applying a false discovery rate of 10%. Since the cerebral patients displayed a particular transcriptional pattern, we focused our analysis on the differences between cerebral malaria patients and mild malaria patients. We further found 842 differentially expressed genes after applying a false discovery rate of 10%. Unsupervised hierarchical clustering of cerebral malaria-informative genes led to clustering of the cerebral malaria patients. The support vector machine method allowed us to correctly classify five out of six cerebral malaria patients and six of six mild malaria patients. Furthermore, the products of the differentially expressed genes were mapped onto a human protein-protein network. This led to the identification of the proteins with the highest number of interactions, including GSK3B, RELA, and APP. The enrichment analysis of the gene functional annotation indicates that genes involved in immune signalling pathways play a role in the occurrence of cerebral malaria. These include BCR-, TCR-, TLR-, cytokine-, FcεRI-, and FCGR- signalling pathways and natural killer cell cytotoxicity pathways, which are involved in the activation of immune cells. In addition, our results revealed an enrichment of genes involved in Alzheimer’s disease. Conclusions In the present study, we examine a set of genes whose expression differed in cerebral malaria patients and mild malaria patients. Moreover, our results provide new insights into the potential effect of the dysregulation of gene expression in immune pathways. Host genetic variation may partly explain such alteration of gene expression. Further studies are required to investigate this in African populations.
Collapse
Affiliation(s)
- Alassane Thiam
- Unité d'Immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - Michel Sanka
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France
| | - Rokhaya Ndiaye Diallo
- Service de Génétique Humaine, Faculté de Médecine, de Pharmacie et d'Odontostomatologie, UCAD, Dakar, Sénégal
| | - Magali Torres
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France
| | - Babacar Mbengue
- Service Immunologie, Faculte de Medecine, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Nicolas Fernandez Nunez
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France
| | - Fatou Thiam
- Département de Génie chimique et biologie, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Gora Diop
- Unité d'Immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal.,Département de Biologie animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Geneviève Victorero
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France
| | - Catherine Nguyen
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France
| | - Alioune Dieye
- Unité d'Immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal.,Service Immunologie, Faculte de Medecine, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Pascal Rihet
- Aix Marseille Univ, INSERM, TAGC UMR U1090, 163 Av de Luminy, 13288, Marseille, cedex 9, France.
| |
Collapse
|
8
|
Ndom M, Diop G, Yanagida T, Quilichini Y, Dieye A, Marchand B, Nakao M, Ito A, Cheikh TBA. Morphological and genetic characterizations of Avitellina tapeworms from domestic ruminants in Senegal: An evidence of specificity among sheep and cattle host. Vet Parasitol Reg Stud Reports 2019; 18:100337. [PMID: 31796200 DOI: 10.1016/j.vprsr.2019.100337] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 09/03/2019] [Accepted: 09/15/2019] [Indexed: 11/25/2022]
Abstract
Avitellina tapeworms are common intestinal parasites of ruminants with a worldwide distribution. In Senegal, only Avitellina centripunctata tapeworm has been reported to date, and genetic diversity was previously confirmed by enzymatic analysis. This study aims to clarify the diversity of Avitellina tapeworms isolated from sheep and cattle in Senegal. In total, 613 adult Avitellina tapeworms were collected from sheep and cattle. Morphological analysis by the light microscopy and scanning electron microscopy identified three Avitellina "morphospecies": A. centripunctata and Avitellina sp.2 were detected in sheep while Avitellina sp.3 was identified in cattle. Molecular phylogenetic analysis based on the complete mitochondrial cytochrome c oxidase subunit 1 gene (cox1) sequences revealed that 101 Avitellina tapeworms were divided into 54 haplotypes grouped into three clades, of which two were specific to sheep and one specific to cattle. Three morphospecies corresponded to each of three clades and the maximum pairwise divergence among the clades ranged from 9.7 to 18.5% in cox1. The present study demonstrates the unexpected diversity of Avitellina tapeworms in domestic ruminants, and emphasize the necessity of re-evaluation of the taxonomy of the genus.
Collapse
Affiliation(s)
- Mallé Ndom
- Laboratoire de Biologie Évolutive, d'Écologie et de Gestion des Écosystèmes, Faculté des Sciences et Techniques, Université Cheikh Anta DIOP de Dakar, BP 5005 Dakar, Sénégal.
| | - Gora Diop
- Laboratoire de Biologie Évolutive, d'Écologie et de Gestion des Écosystèmes, Faculté des Sciences et Techniques, Université Cheikh Anta DIOP de Dakar, BP 5005 Dakar, Sénégal
| | - Tetsuya Yanagida
- Laboratory of Veterinary Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi 753-8515, Japan
| | - Yann Quilichini
- CNRS -UMR SPE 6134, Service d'Étude et de Recherche en Microscopie Électronique, Campus Grimaldi, BP 52, 20250 Corte, Université de Corse, Corse, France
| | - Alioune Dieye
- Service d'Immunologie FMPO, Université Cheikh Anta DIOP de Dakar, Dakar, Sénégal
| | - Bernard Marchand
- CNRS -UMR SPE 6134, Service d'Étude et de Recherche en Microscopie Électronique, Campus Grimaldi, BP 52, 20250 Corte, Université de Corse, Corse, France
| | - Minoru Nakao
- Department of Parasitology, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Akira Ito
- Department of Parasitology, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Tidiane B A Cheikh
- Laboratoire de Biologie Évolutive, d'Écologie et de Gestion des Écosystèmes, Faculté des Sciences et Techniques, Université Cheikh Anta DIOP de Dakar, BP 5005 Dakar, Sénégal
| |
Collapse
|
9
|
Diop G, Derbois C, Loucoubar C, Mbengue B, Ndao BN, Thiam F, Thiam A, Ndiaye R, Dieye Y, Olaso R, Deleuze JF, Dieye A. Genetic variants of RNASE3 (ECP) and susceptibility to severe malaria in Senegalese population. Malar J 2018; 17:61. [PMID: 29402293 PMCID: PMC5800030 DOI: 10.1186/s12936-018-2205-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 01/23/2018] [Indexed: 11/10/2022] Open
Abstract
Background Severe forms of malaria (SM) are an outcome of Plasmodium falciparum infection and can cause death especially in children under 4 years of age. RNASE3 (ECP) has been identified as an inhibitor of Plasmodium parasites growth in vitro, and genetic analysis in hospitalized Ghanaian subjects has revealed the RNASE3 +371G/C (rs2073342) polymorphism as a susceptibility factor for cerebral malaria. The +371 C allele results in an Arg/Thr mutation that abolishes the cytotoxic activity of the ECP protein. The present study aims to investigate RNASE3 gene polymorphisms and their putative link to severe malaria in a malaria cohort from Senegal. Methods/results Patients enrolled from hospitals were classified as having either uncomplicated (UM) or severe malaria (SM). The analysis of the RNASE3 gene polymorphisms was performed in 241 subjects: 178 falciparum infected (96 SM, 82 UM) and 63 non-infected subjects as population control group (CTR). Six frequent SNPs (MAF > 3%) were identified, and one SNP was associated with malaria severity by performing a logistic regression analysis SM vs.UM: RNASE3 +499G/C (rs2233860) under age, sex as covariates and HbS/HbC polymorphisms adjustment (p = 0.003, OR 0.43, CI 95% 0.20–0.92). The polymorphisms: +371G/C (rs2073342), +499G/C (rs2233860) and +577A/T (rs8019343) defined a haplotype risk (G-G-T) for malaria severity (Fisher exact test, p = 0.03) (OR 4.1, IC 95% (1.1–14.9). Conclusion In addition to the previously described association of +371G/C polymorphism in Ghanaians cohort, the RNASE3 +499G/C polymorphism was associated with susceptibility to SM in a Senegalese population. The haplotype +371G/+499G/+577T defined by RNASE3 polymorphisms was associated with severity. The genetic association identified independently in the Senegalese population provide additional evidence of a role of RNASE3 (ECP) in malaria severity.
Collapse
Affiliation(s)
- Gora Diop
- Faculté des Sciences et Techniques, Département de Biologie animale, Unité postulante de Biologie Génétique, Génomique et Bioinformatique (G2B), Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Sénégal. .,Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal.
| | - Céline Derbois
- Unité de Moyen-bas Débit, Institut de Génomique-CEA, Centre National de Recherche en Génomique Humaine, 2 rue Gaston Crémieux, CP 5721, 91057, Evry Cedex, France
| | - Cheikh Loucoubar
- Groupe G4, Biostatistique et Bioinformatique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal
| | - Babacar Mbengue
- Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal.,Faculté de Médecine, de Pharmacie et d'Odontologie, Service d'Immunologie, Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Senegal
| | - Bineta Niakhana Ndao
- Faculté des Sciences et Techniques, Département de Biologie animale, Unité postulante de Biologie Génétique, Génomique et Bioinformatique (G2B), Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Sénégal
| | - Fatou Thiam
- Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal.,Département de Génie chimique et Biologie appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Senegal
| | - Alassane Thiam
- Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal
| | - Rokhaya Ndiaye
- Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal.,Faculté de Médecine, de Pharmacie et d'Odontologie, Service d'Immunologie, Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Senegal
| | - Yakhya Dieye
- Département de Génie chimique et Biologie appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Senegal
| | - Robert Olaso
- Unité de Moyen-bas Débit, Institut de Génomique-CEA, Centre National de Recherche en Génomique Humaine, 2 rue Gaston Crémieux, CP 5721, 91057, Evry Cedex, France
| | - Jean-Francois Deleuze
- Unité de Moyen-bas Débit, Institut de Génomique-CEA, Centre National de Recherche en Génomique Humaine, 2 rue Gaston Crémieux, CP 5721, 91057, Evry Cedex, France
| | - Alioune Dieye
- Unité d'Immunogénétique, Institut Pasteur de Dakar, 36, avenue Pasteur, BP: 220, Dakar, Senegal.,Faculté de Médecine, de Pharmacie et d'Odontologie, Service d'Immunologie, Université Cheikh Anta DIOP de Dakar, UCAD, Avenue Cheikh Anta DIOP, BP: 5005, Dakar, Senegal
| |
Collapse
|
10
|
Ndom M, Yanagida T, Diop G, Quilichini Y, Ba A, Sako Y, Nakao M, Marchand B, Dieye A, Ba CT, Ito A. Genetic and morphological characterization of Thysaniezia tapeworms from cattle and sheep in Senegal. Vet Parasitol Reg Stud Reports 2018; 11:27-31. [PMID: 31014614 DOI: 10.1016/j.vprsr.2017.11.008] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 11/05/2017] [Accepted: 11/16/2017] [Indexed: 11/26/2022]
Abstract
Genetic and morphological diversity of Thysaniezia tapeworms from cattle and sheep in Senegal was investigated using light and scanning microscopic observations and molecular analysis based on mitochondrial cytochrome c oxidase subunit 1 (cox1) and nuclear small subunit ribosomal RNA gene (SSU rDNA). A total of 52 adult tapeworms were collected from sheep and cattle. Although the tapeworms of the two hosts were morphologically very close, phylogenetic analysis based on cox1 and SSU rDNA gene sequences showed that they were divided into two clades corresponding each to a host. The maximum pairwise divergence between the clades were 12.1% in cox1 and 2.9% in SSU rDNA, indicating they are distinct species. The tapeworms collected from sheep were morphologically identified as Thysaniezia ovilla, a cosmopolitan species in domestic ruminants. Detailed morphological observations revealed a consistent difference between the tapeworms obtained from sheep and those from cattle. The latter were identified as Thysaniezia connochaeti. The present study highlights presence of two species of Thysaniezia among domestic ruminants in Senegal: T. ovilla specific to sheep and T. connochaeti specific to cattle. Our work is the first report of T. connochaeti from domestic animals.
Collapse
Affiliation(s)
- Mallé Ndom
- Université Cheikh Anta Diop de Dakar, Laboratoire de Biologie Évolutive, d'Écologie et Gestion des Écosystèmes, Faculté des Sciences et Techniques, BP 5005 Dakar, Senegal.
| | - Tetsuya Yanagida
- Laboratory of Veterinary Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi 753-8515, Japan
| | - Gora Diop
- Université Cheikh Anta Diop de Dakar, Laboratoire de Biologie Évolutive, d'Écologie et Gestion des Écosystèmes, Faculté des Sciences et Techniques, BP 5005 Dakar, Senegal
| | - Yann Quilichini
- CNRS, Université de Corse, UMR SPE 6134, Service d'Étude et de Recherche en Microscopie Électronique, Campus Grimaldi, BP 52, 20250 Corte, Corse, France
| | - Aïssatou Ba
- Université Cheikh Anta Diop de Dakar, Laboratoire de Biologie Évolutive, d'Écologie et Gestion des Écosystèmes, Faculté des Sciences et Techniques, BP 5005 Dakar, Senegal
| | - Yasuhito Sako
- Department of Parasitology, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Minoru Nakao
- Department of Parasitology, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Bernard Marchand
- CNRS, Université de Corse, UMR SPE 6134, Service d'Étude et de Recherche en Microscopie Électronique, Campus Grimaldi, BP 52, 20250 Corte, Corse, France
| | - Alioune Dieye
- Unité d'Immunogénétique, Institut Pasteur de Dakar, Dakar, Senegal
| | - Cheikh Tidiane Ba
- Université Cheikh Anta Diop de Dakar, Laboratoire de Biologie Évolutive, d'Écologie et Gestion des Écosystèmes, Faculté des Sciences et Techniques, BP 5005 Dakar, Senegal
| | - Akira Ito
- Department of Parasitology, Asahikawa Medical University, Asahikawa 078-8510, Japan
| |
Collapse
|
11
|
Boudzoumou-Diagambana EB, Diagne N, Ndiaye M, Diop G, Ndiaye M. La maladie de Charcot-Marie-Tooth : à propos d’une observation. Neurophysiol Clin 2017. [DOI: 10.1016/j.neucli.2017.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
12
|
Mbengue B, Kpodji P, Sylla Niang M, Varela ML, Thiam A, Sow A, Ndiaye K, Aidara M, Thiam F, Ndiaye R, Diop G, Nguer CM, Perraut R, Dièye A. [Profiles of IgG responses against CSP, GLURP and LSA-3NR2 in urban malaria (Dakar): relations with haemoglobin levels and parasite densities]. Bull Soc Pathol Exot 2016; 109:91-98. [PMID: 27100862 DOI: 10.1007/s13149-016-0485-2] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 02/23/2016] [Indexed: 06/05/2023]
Abstract
Malaria remains a major health problem in sub- Saharan African countries despite substantial decreases in morbidity and mortality due to sustained control programs. Vaccines candidates were mainly tested in rural endemic setting; however increasing proportion of the population is living in urban area. Evaluation of the qualitative or quantitative immune responses to key targets of anti-Plasmodium immunity requires further investigation in urban area. In a cohort of 144 patients with mild malaria living in Dakar, we analyzed IgG responses against target antigens of P. falciparum: CSP, LSA-3NR2 and GLURP by ELISA. A mean age of 15 yrs (4-65 yrs) was found and patients were separated in 59 adults (<15yrs) and 85 children (≤15 yrs). Parasites densities (0,01-15%) did not differ between the two age groups. In contrast, haemoglobin levels appeared lower in children (4.5-16.6 g/dl) (p<0.01). For the immune results, the most recognized antigens were GLURP and CSP compared to LSA-3NR2. Levels of IgG against these antigens were significantly different between the two age groups and they were positively correlated (rho = 0.32; p<0.001). In addition, levels of IgG anti-GLURP were associated with low parasitemia (≤1%) and absence of anemia (≥11g/dl), particularly in adults (p<0.001). In a multiple regression analysis, no significant relationship was found between parasite densities and IgG responses against all the tested antigens. Our study shows the implication of IgG anti-GLURP in humoral immune response against the parasite. The present work contributes to determine IgG levels that can be used as relevant immunologic biomarkers in urban clinical malaria.
Collapse
Affiliation(s)
- B Mbengue
- Service d'immunologie FMPO, Université Cheikh Anta Diop, Dakar, Sénégal.
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal.
| | - P Kpodji
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - M Sylla Niang
- Service d'immunologie FMPO, Université Cheikh Anta Diop, Dakar, Sénégal
| | - M L Varela
- Unité d'immunologie, Institut Pasteur de Dakar, Dakar, Sénégal
| | - A Thiam
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - A Sow
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - K Ndiaye
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - M Aidara
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - F Thiam
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - R Ndiaye
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - G Diop
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| | - C M Nguer
- Département génie chimique et biologie appliquée, ESP, Université Cheikh Anta Diop, Dakar, Sénégal
| | - R Perraut
- Unité d'immunologie, Institut Pasteur de Dakar, Dakar, Sénégal
| | - A Dièye
- Unité d'immunogénétique, Institut Pasteur de Dakar, Dakar, Sénégal
| |
Collapse
|
13
|
Diop F, Diop G, Niang M, Diouf B, Ndiaye D, Richard V, Balde AT. The value of local malaria strains for serological studies: local strains versus Palo Alto reference strain. Malar J 2015; 14:229. [PMID: 26026312 PMCID: PMC4464863 DOI: 10.1186/s12936-015-0734-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 05/20/2015] [Indexed: 11/30/2022] Open
Abstract
Background The standardization of the type of crude Plasmodium falciparum extracts for assays to evaluate the overall anti-blood-stage immune response in humans may be beneficial to malaria pre-elimination programmes. However, there is no consensus on which strain is appropriate for routine analyses. This study aimed to compare the responses of malaria IgG antibodies in serum collections from Dielmo and Ndiop to crude extracts of merozoites and schizonts of local and reference strains of P. falciparum. Methods Malaria antibodies were evaluated using serological tests for exposure to three local strains (0703, F15 and F16) and the P. falciparum reference Palo Alto strain (PA). A total of 218 sera collected in 2000 from inhabitants of the villages of Dielmo and Ndiop were used: 142 from Dielmo and 76 from Ndiop. The biological collection was used to evaluate by ELISA the prevalence of IgG antibodies against crude merozoite and schizont extracts. The genetics of the local and reference strains were compared. Results There was genetic divergence between strains 0703, F15, F16 and PA. IgG responses against local and reference strains correlated well (0.6 to 0.8; p < 0.01). Ig G responses were highest to schizont and merozoite extracts from the field strain of P. falciparum 0703 adapted to in vitro culture. Extracts of P. falciparum strain 0703 isolated from a subject in Dielmo was the most widely recognized [91.3 % (199/218) and 81.2 % (177/218) for schizonts and merozoites, respectively], although the responses were high for merozoites from PA [85.3 % (186/218)] the reference strain, and the two strains isolated from subjects living in Dakar: F15 [90.4 % (197/218)] and F16 [72.5 % (158/218)]. Conclusions For serological studies, the local strain provided the most complete picture of exposure to transmission and malaria prevalence in the local context. However, for the standardization of this method by different laboratories, the reference strain appeared to perform sufficiently well to be used for the evaluation of malaria control programmes.
Collapse
Affiliation(s)
- Fode Diop
- Immunology Unit, Institut Pasteur Dakar, Dakar, Senegal. .,Laboratory of Parasitology-Biology, Faculty of Sciences and Technology, Cheikh Anta DIOP University of Dakar, Dakar, Senegal.
| | - Gora Diop
- Laboratory of Parasitology-Biology, Faculty of Sciences and Technology, Cheikh Anta DIOP University of Dakar, Dakar, Senegal. .,Immunogenetic Unit, Institut Pasteur Dakar, Dakar, Senegal.
| | - Makhtar Niang
- Immunology Unit, Institut Pasteur Dakar, Dakar, Senegal.
| | - Babacar Diouf
- Immunology Unit, Institut Pasteur Dakar, Dakar, Senegal.
| | - Daouda Ndiaye
- Laboratory of Parasitology-Mycology, Faculty of Medicine and Pharmacy, Cheikh Anta Diop University of Dakar, Dakar, Senegal.
| | | | | |
Collapse
|
14
|
Diop G, Yanagida T, Hailemariam Z, Menkir S, Nakao M, Sako Y, Ba CT, Ito A. Genetic characterization of Moniezia species in Senegal and Ethiopia. Parasitol Int 2015; 64:256-60. [PMID: 25752566 DOI: 10.1016/j.parint.2015.02.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Revised: 02/20/2015] [Accepted: 02/25/2015] [Indexed: 11/24/2022]
Abstract
Genetic diversity of Moniezia spp. from domestic ruminants in Senegal and Ethiopia was investigated based on the nucleotide sequences of mitochondrial cytochrome c oxidase subunit 1 (cox1) and nuclear small subunit ribosomal RNA gene (SSU rDNA). A total of 64 adult tapeworms were collected from sheep, goat and cattle, and the tapeworms from cattle were all morphologically identified as Moniezia benedeni. On the other hand, the tapeworms obtained from sheep and goat were identified as Moniezia expansa or could not be identified because of the lack of diagnostic morphologic character, i.e. interproglottidal glands (IPGs). Phylogenetic analysis based on cox1 gene sequences revealed that the worms from sheep/goat and cattle formed distinct clades, and three mitochondrial lineages were confirmed within the sheep/goat tapeworms. The maximum pairwise divergences among the three mitochondrial linages were about 3% in cox1 and 0.1% in SSU rDNA, while that between the worms from sheep/goat and cattle reached 13% in cox1 and 2.7% in SSU rDNA. All of the three mitochondrial lineages contained tapeworms morphologically identified as M. expansa, and the tapeworms without IPGs were confirmed in one of the three lineages, indicating the tapeworms without IPGs were also M. expansa.
Collapse
Affiliation(s)
- Gora Diop
- Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, Senegal
| | - Tetsuya Yanagida
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510 Japan.
| | - Zerihun Hailemariam
- College of Veterinary Medicine, Haramaya University, P.O. Box 281, Dire-Dawa Ethiopia
| | - Sissay Menkir
- Department of Biology, Haramaya University, P.O. Box 138, Dire-Dawa Ethiopia
| | - Minoru Nakao
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510 Japan
| | - Yasuhito Sako
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510 Japan
| | - Cheikh Tidiane Ba
- Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, Senegal
| | - Akira Ito
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510 Japan
| |
Collapse
|
15
|
Mbengue B, Sylla Niang M, Ndiaye Diallo R, Diop G, Thiam A, Ka O, Touré A, Tall A, Perraut R, Dièye A. [IgG responses to candidate malaria vaccine antigens in the urban area of Dakar (Senegal): evolution according to age and parasitemia in patients with mild symptoms]. ACTA ACUST UNITED AC 2015; 108:94-101. [PMID: 25925805 DOI: 10.1007/s13149-015-0419-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 11/25/2014] [Indexed: 12/22/2022]
Abstract
Malaria remains a major problem in African countries despite substantial decreases in morbidity and mortality due to sustained control programs. Studies for the evaluation of qualitative or quantitative Ab responses to key targets of anti-plasmodium immunity were mostly done in rural endemic setting compared to urban area. In a cohort of 200 patients with mild malaria and living in Dakar, we analyze total and subclasses IgG responses to a panel of P. falciparum blood stage antigens: MSP1p19, MSP3, EB200, GST-5 and R23. A mean age of 15 yrs (4 to 56 yrs) and parasitemia between 0.1 to 17% were found. Levels of IgG anti-MSP3 were higher in patients with low parasitemia (≤1%) and appear negatively correlated to parasite densities (Rho =. 0.54; p= 0.021). This correlation is more significant in children (≤ 15 yrs). In addition, an increase of IgG responses against MSP1p19 is highly observed in adults having a parasitemia less than 1%. In those patients, we find that IgG1 subclasses were predominant (p <0.01). Our study shows an association between Ab responses and parasitemia. This association is dependant to IgG anti-MSP3 in children and IgG anti-MSP1p19 in adults living in urban area.
Collapse
Affiliation(s)
- B Mbengue
- Service d'immunologie UCAD FMPO, Dakar, Sénégal,
| | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Diop F, Richard V, Diouf B, Sokhna C, Diagne N, Trape JF, Faye MM, Tall A, Diop G, Balde AT. Dramatic declines in seropositivity as determined with crude extracts of Plasmodium falciparum schizonts between 2000 and 2010 in Dielmo and Ndiop, Senegal. Malar J 2014; 13:83. [PMID: 24602390 PMCID: PMC3975713 DOI: 10.1186/1475-2875-13-83] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 02/26/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Programmes of pre-elimination of malaria have been implemented in Senegal since 2010, and the burden of malaria has decreased substantially. These changes in the epidemiology should be monitored with effective tools that allow changes in patterns of transmission to be estimated. In Dielmo and Ndiop, two villages of Senegal with different malaria endemicity, infections have been followed longitudinally for 20 years, during which time there have been several control interventions leading to substantial decreases of transmission. This study aimed to compare malaria antibody responses of the inhabitants of these two villages, between 2000 and 2010, using schizont crude extracts of a local strain of P. falciparum (Pf Sch07/03). METHODS Sera collected from inhabitants of the two villages (141 from Dielmo and 79 from Ndiop in 2000; 143 from Dielmo and 79 from Ndiop in 2010) were used to assess the prevalence of antibodies against crude schizont extracts of Pf Sch07/03. Three ages groups were defined: [5-9] yrs, [10-14] yrs and [15-19] yrs. Statistical comparisons were performed. Seroprevalence and the magnitude of antibody responses were compared between age groups, villages and periods. RESULTS Overall seroprevalence to P.fSch07/03 decreased between 2000 and 2010 in both villages: from 94.4% to 44.4% in Dielmo and from 74.4% to 34.6% in Ndiop. The difference between Dielmo and Ndiop was highly significant in 2000 (p<0.001) but not in 2010 (p >0.20). The decrease in seroprevalence was larger in younger (more than 40%) than older (less than 19%) inhabitants. Longitudinal monitoring of the younger group showed that seroprevalence decreased between 2000 and 2010 in Dielmo from 98.7 to 79.3, but not in Ndiop from 67.6 to 66.7. The magnitude of antibody responses in seropositive individuals was significantly higher in 2000 than 2010 for both villages. CONCLUSIONS Crude extracts of P. falciparum are appropriate tools for evaluating malaria prevalence at different periods, and in both low and high endemic area. Using crude extracts from local strains to assess transmission may allow efficient evaluation of the consequences of control programs on malaria transmission.
Collapse
|
17
|
Terao C, Ohmura K, Katayama M, Takahashi M, Kokubo M, Diop G, Toda Y, Yamamoto N, Shinkura R, Shimizu M, Gut I, Heath S, Melchers I, Manabe T, Lathrop M, Mimori T, Yamada R, Matsuda F. Myelin basic protein as a novel genetic risk factor in rheumatoid arthritis--a genome-wide study combined with immunological analyses. PLoS One 2011; 6:e20457. [PMID: 21673997 PMCID: PMC3108877 DOI: 10.1371/journal.pone.0020457] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 04/21/2011] [Indexed: 02/05/2023] Open
Abstract
Rheumatoid arthritis (RA) is a major cause of adult chronic inflammatory arthritis and a typical complex trait. Although several genetic determinants have been identified, they account for only a part of the genetic susceptibility. We conducted a genome-wide association study of RA in Japanese using 225,079 SNPs genotyped in 990 cases and 1,236 controls from two independent collections (658 cases and 934 controls in collection1; 332 cases and 302 controls in collection2), followed by replication studies in two additional collections (874 cases and 855 controls in collection3; 1,264 cases and 948 controls in collection4). SNPs showing p<0.005 in the first two collections and p<10−4 by meta-analysis were further genotyped in the latter two collections. A novel risk variant, rs2000811, in intron2 of the myelin basic protein (MBP) at chromosome 18q23 showed strong association with RA (p = 2.7×10−8, OR 1.23, 95% CI: 1.14–1.32). The transcription of MBP was significantly elevated with the risk allele compared to the alternative allele (p<0.001). We also established by immunohistochemistry that MBP was expressed in the synovial lining layer of RA patients, the main target of inflammation in the disease. Circulating autoantibody against MBP derived from human brain was quantified by ELISA between patients with RA, other connective tissue diseases and healthy controls. As a result, the titer of anti-MBP antibody was markedly higher in plasma of RA patients compared to healthy controls (p<0.001) and patients with other connective tissue disorders (p<0.001). ELISA experiment using citrullinated recombinant MBP revealed that a large fraction of anti-MBP antibody in RA patients recognized citrullinated MBP. This is the first report of a genetic study in RA implicating MBP as a potential autoantigen and its involvement in pathogenesis of the disease.
Collapse
Affiliation(s)
- Chikashi Terao
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Global Centers of Excellence (COE) program, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Koichiro Ohmura
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masaki Katayama
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Meiko Takahashi
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Miki Kokubo
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Core Research of Evolutional Science and Technology (CREST) program, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
| | - Gora Diop
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshinobu Toda
- Center for Anatomical Studies, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Natsuki Yamamoto
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | | | - Reiko Shinkura
- Department of Immunology and Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masakazu Shimizu
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ivo Gut
- Commisariat a l'energie Atomique (CEA), Institut Genomique, Centre National de Genotypage, Evry, France
| | - Simon Heath
- Commisariat a l'energie Atomique (CEA), Institut Genomique, Centre National de Genotypage, Evry, France
| | - Inga Melchers
- Clinical Research Unit for Rheumatology, University Medical Center, Freiburg, Germany
| | - Toshiaki Manabe
- Laboratory of Diagnostic Pathology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Mark Lathrop
- Commisariat a l'energie Atomique (CEA), Institut Genomique, Centre National de Genotypage, Evry, France
- Fondation Jean Dausset, Centre d'Etude du Polymorphisme Humain, Paris, France
| | - Tsuneyo Mimori
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ryo Yamada
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Unit of Statistical Genetics, Center for Genomic Medicine Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - Fumihiko Matsuda
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Core Research of Evolutional Science and Technology (CREST) program, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
- Institut National de la Sante et de la Recherche Medicale (INSERM) Unite U852, Kyoto University Graduate School of Medicine, Kyoto, Japan
- * E-mail:
| |
Collapse
|
18
|
Limou S, Coulonges C, Herbeck JT, van Manen D, An P, Le Clerc S, Delaneau O, Diop G, Taing L, Montes M, van't Wout AB, Gottlieb GS, Therwath A, Rouzioux C, Delfraissy JF, Lelièvre JD, Lévy Y, Hercberg S, Dina C, Phair J, Donfield S, Goedert JJ, Buchbinder S, Estaquier J, Schächter F, Gut I, Froguel P, Mullins JI, Schuitemaker H, Winkler C, Zagury JF. Multiple-cohort genetic association study reveals CXCR6 as a new chemokine receptor involved in long-term nonprogression to AIDS. J Infect Dis 2010; 202:908-15. [PMID: 20704485 DOI: 10.1086/655782] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND The compilation of previous genomewide association studies of AIDS shows a major polymorphism in the HCP5 gene associated with both control of the viral load and long-term nonprogression (LTNP) to AIDS. METHODS To look for genetic variants that affect LTNP without necessary control of the viral load, we reanalyzed the genomewide data of the unique LTNP Genomics of Resistance to Immunodeficiency Virus (GRIV) cohort by excluding "elite controller" patients, who were controlling the viral load at very low levels (<100 copies/mL). RESULTS The rs2234358 polymorphism in the CXCR6 gene was the strongest signal (P=2.5 x 10(-7); odds ratio, 1.85) obtained for the genomewide association study comparing the 186 GRIV LTNPs who were not elite controllers with 697 uninfected control subjects. This association was replicated in 3 additional independent European studies, reaching genomewide significance of P(combined)=9.7 x 10(-10). This association with LTNP is independent of the CCR2-CCR5 locus and the HCP5 polymorphisms. CONCLUSIONS The statistical significance, the replication, and the magnitude of the association demonstrate that CXCR6 is likely involved in the molecular etiology of AIDS and, in particular, in LTNP, emphasizing the power of extreme-phenotype cohorts. CXCR6 is a chemokine receptor that is known as a minor coreceptor in human immunodeficiency virus type 1 infection but could participate in disease progression through its role as a mediator of inflammation.
Collapse
Affiliation(s)
- Sophie Limou
- Chaire de Bioinformatique, Conservatoire National des Arts et Métiers
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Vasilescu A, Terashima Y, Enomoto M, Heath S, Poonpiriya V, Gatanaga H, Do H, Diop G, Hirtzig T, Auewarakul P, Lauhakirti D, Sura T, Charneau P, Marullo S, Therwath A, Oka S, Kanegasaki S, Lathrop M, Matsushima K, Zagury JF, Matsuda F. A haplotype of the human CXCR1 gene protective against rapid disease progression in HIV-1+ patients. Proc Natl Acad Sci U S A 2007; 104:3354-9. [PMID: 17360650 PMCID: PMC1805621 DOI: 10.1073/pnas.0611670104] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Indexed: 11/18/2022] Open
Abstract
Chemokines and their receptors are key factors in the onset and progression of AIDS. Among them, accumulating evidence strongly indicates the involvement of IL-8 and its receptors, CXCR1 and CXCR2, in AIDS-related conditions. Through extensive investigation of genetic variations of the human CXCR1-CXCR2 locus, we identified a haplotype of the CXCR1 gene (CXCR1-Ha) carrying two nonsynonymous single nucleotide polymorphisms, CXCR1_300 (Met to Arg) in the N terminus extracellular domain and CXCR1_142 (Arg to Cys) in the C terminus intracellular domain. Transfection experiments with CXCR1 cDNAs corresponding to the CXCR1-Ha and the alternative CXCR1-HA haplotype showed reduced expression of CD4 and CXCR4 in CXCR1-Ha cells in human osteosarcoma cells as well as in Jurkat and CEM human T lymphocytes. Furthermore, the efficiency of X4-tropic HIV-1(NL4-3) infection was significantly lower in CXCR1-Ha cells than in CXCR1-HA cells. The results were further confirmed by a series of experiments using six HIV-1 clinical isolates from AIDS patients. A genetic association study was performed by using an HIV-1(+) patient cohort consisting of two subpopulations of AIDS with extreme phenotypes of rapid and slow progression of the disease. The frequency of the CXCR1-Ha allele is markedly less frequent in patients with rapid disease onset than those with slow progression (P = 0.0003). These results provide strong evidence of a protective role of the CXCR1-Ha allele on disease progression in AIDS, probably acting through modulation of CD4 and CXCR4 expression.
Collapse
Affiliation(s)
- A. Vasilescu
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - Y. Terashima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - M. Enomoto
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - S. Heath
- Centre National de Génotypage, 91057 Evry, France
| | - V. Poonpiriya
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
| | - H. Gatanaga
- AIDS Clinical Center, International Medical Center of Japan, Tokyo 162-8655, Japan
| | - H. Do
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - G. Diop
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - T. Hirtzig
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - P. Auewarakul
- Department of Microbiology, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - D. Lauhakirti
- Department of Microbiology, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - T. Sura
- Department of Molecular Biology, Ramathibodi Hospital, Mahidol University, Bangkok 10700, Thailand
| | - P. Charneau
- Virologie Moléculaire et Vectorologie, Institut Pasteur, 75724 Paris, France
| | - S. Marullo
- Département de Biologie Cellulaire et de Maladies Infectieuses, Institut Cochin, 75014 Paris, France
| | - A. Therwath
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
- Laboratoire d'Oncologie Moléculaire, Université Paris 7, 75251 Paris, France; and
| | - S. Oka
- AIDS Clinical Center, International Medical Center of Japan, Tokyo 162-8655, Japan
| | - S. Kanegasaki
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - M. Lathrop
- Centre National de Génotypage, 91057 Evry, France
| | - K. Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
| | - J.-F. Zagury
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - F. Matsuda
- Centre National de Génotypage, 91057 Evry, France
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| |
Collapse
|
20
|
Do H, Vasilescu A, Carpentier W, Meyer L, Diop G, Hirtzig T, Coulonges C, Labib T, Spadoni JL, Therwath A, Lathrop M, Matsuda F, Zagury JF. Exhaustive genotyping of the interleukin-1 family genes and associations with AIDS progression in a French cohort. J Infect Dis 2006; 194:1492-504. [PMID: 17083033 DOI: 10.1086/508545] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Accepted: 05/24/2006] [Indexed: 11/03/2022] Open
Abstract
Interleukin (IL)-1 family members are key players in inflammatory processes but have been the subject of few studies of acquired immunodeficiency syndrome (AIDS). To better evaluate the impact of the IL-1 family on AIDS development, we genotyped the IL1 alpha , IL1 beta , IL1Ra, and IL1R1 genes in 245 slow progressor (SP) and 82 rapid progressor (RP) human immunodeficiency virus type 1-seropositive patients as well as in 446 control subjects, all of whom were of white ethnicity. One hundred sixteen frequent polymorphisms were identified, of which 23 were newly characterized by our study. Many putative associations were found between single-nucleotide polymorphism (SNP) or haplotype alleles and the extreme profiles of progression. Most of them corresponded to weak associations (.01<P<.05); however, the SNP IL1Ra_2134 exhibited a consistent association, found at the level of the SNP, haplotypes, and haploblocks, when the SP and control populations were compared (P=.0002). The IL-1-dependent inflammatory response is, thus, likely to play a role in AIDS progression via the regulation of IL-1Ra expression. This association will need to be confirmed in other AIDS cohorts, and experiments will also have to be performed to unravel the biological mechanisms at work. The data presented here will be useful for future genomic studies of the IL-1 family members in other infectious and chronic inflammatory diseases.
Collapse
Affiliation(s)
- Herve Do
- Centre National de Genotypage, Evry, Conservatoire National des Arts et Metiers, Paris, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Diop G, Hirtzig T, Do H, Coulonges C, Vasilescu A, Labib T, Spadoni JL, Therwath A, Lathrop M, Matsuda F, Zagury JF. Exhaustive genotyping of the interferon alpha receptor 1 (IFNAR1) gene and association of an IFNAR1 protein variant with AIDS progression or susceptibility to HIV-1 infection in a French AIDS cohort. Biomed Pharmacother 2006; 60:569-77. [PMID: 17027223 DOI: 10.1016/j.biopha.2006.08.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Accepted: 08/09/2006] [Indexed: 11/28/2022] Open
Abstract
We have undertaken a systematic genomic approach in order to explore the role of the interferon alpha (IFN-alpha) pathway in AIDS disease development. As it is very difficult to genotype the IFN-alpha gene itself since it has many pseudo-genes, we have focused our interest on the genetic polymorphisms of the IFN-alpha receptor 1 (IFNAR1). We genotyped the Genetics of Resistance to Immunodeficiency Virus (GRIV) cohort composed of patients with extreme profiles of progression to AIDS, slow progressors (SP) and rapid progressors (RP), as well as seronegative controls (CTR). We identified 19 single nucleotide polymorphisms (SNPs) with a minor allele frequency (MAF) greater than 1% among which two were newly characterized by our study. We found putative associations with AIDS disease development for four SNP alleles and for three haplotypes. The most interesting signals were found for two SNPs in linkage disequilibrium, the SNP IFNAR1_18339 corresponding to a Val168Leu mutation in the extracellular domain of the protein and the intronic SNP, IFNAR1_30127. The intronic SNP IFNAR1_30127 yielded a strong signal both when comparing SP with CTR (P=0.002) and RP with CTR (P=0.005) while IFNAR1_18339 yielded a smaller signal because less patients were analyzed; these SNPs could thus be involved in AIDS progression or in susceptibility to human immunodeficiency virus 1 (HIV-1) infection. Interestingly, two independent studies have previously pointed out the SNP IFNAR1_18339 in susceptibility to multiple sclerosis and to malaria. This is the first work investigating the polymorphisms of the IFNAR1 gene in AIDS. Our results which point out a possible role for the IFN-alpha pathway in susceptibility to HIV-1 infection or progression to AIDS need a necessary confirmation by genomic studies in other AIDS cohorts.
Collapse
Affiliation(s)
- G Diop
- Equipe génomique, bio-informatique et pathologies du système immunitaire, Inserm U736, 15, rue de l'Ecole-de-Médecine, 75006 Paris, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Do H, Vasilescu A, Diop G, Hirtzig T, Coulonges C, Labib T, Heath SC, Spadoni JL, Therwath A, Lathrop M, Matsuda F, Zagury JF. Associations of the IL2Ralpha, IL4Ralpha, IL10Ralpha, and IFN (gamma) R1 cytokine receptor genes with AIDS progression in a French AIDS cohort. Immunogenetics 2006; 58:89-98. [PMID: 16491350 DOI: 10.1007/s00251-005-0072-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2005] [Accepted: 11/28/2005] [Indexed: 10/25/2022]
Abstract
We have performed an extensive analysis of Th1/Th2 cytokine receptors IL2Ralpha, IL4Ralpha, IL10Ralpha, and IFNgammaR1 gene polymorphisms to evaluate their impact on AIDS progression. The coding regions and promoters of these genes were sequenced in the genetics of resistance to immunodeficiency virus cohort, composed of 327 HIV-1-positive patients with extreme progression phenotypes, slow and rapid progressors, and of 446 healthy control subjects, all of them of Caucasian descent. Overall, 104 single nucleotide polymorphisms and four insertions/deletions with a minor allelic frequency higher than 1% were identified, 21 of them being newly characterized. We observed weak associations for 13 polymorphisms of IL2Ralpha, IL4Ralpha, IL10Ralpha, and IFNgammaR1, and 11 haplotypes of IL2Ralpha, IL4Ralpha, and IFNgammaR1. However, we could not relate these positive signals to any relevant biological information on the gene function. To affirm these putative associations in AIDS, further confirmation on other AIDS cohorts will be needed. This complete catalog of polymorphisms in IL2Ralpha, IL4Ralpha, IL10Ralpha, and IFNgammaR1 cytokine receptor genes should also be useful for investigating associations in other immune-related diseases.
Collapse
Affiliation(s)
- Hervé Do
- Equipe génomique, bioinformatique et pathologies du système immunitaire, INSERM U736, 15 rue de l'Ecole de Médecine, 75006, Paris, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Diop G, Spadoni JL, Do H, Hirtzig T, Coulonges C, Labib T, Issing W, Rappaport J, Therwath A, Lathrop M, Matsuda F, Zagury JF. Genomic approach of AIDS pathogenesis: exhaustive genotyping of the TNFR1 gene in a French AIDS cohort. Biomed Pharmacother 2006; 59:474-80. [PMID: 16153798 DOI: 10.1016/j.biopha.2005.07.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2005] [Indexed: 12/30/2022] Open
Abstract
Large-scale genomic studies in cohorts have been made possible for the last few years thanks to the progress of molecular biology and bioinformatics. This systematic approach allows a better understanding of the molecular mechanisms of disease development and as a consequence can contribute to the rational design of new diagnostic and therapeutic tools. We present here the exhaustive genotyping of a candidate gene, tumor necrosis factor receptor 1 (TNFR1), in the genetic of resistance to immunodeficiency virus (GRIV) AIDS cohort. This gene was chosen because it is likely to be involved in the apoptosis pathways of CD4+ and CD8+ T-cells during human immunodeficiency virus 1 (HIV-1) infection. Seven frequent polymorphisms were characterized in 319 HIV-1 seropositive patients from the GRIV cohort with extreme disease progression phenotypes, slow progression or rapid progression, and in 427 healthy controls. The TNFR1 gene locus does not appear to be part of any haploblock and contains only a small haploblock of two successive SNPs. One promoter SNP (TNFR1_17444594, position -581) and one intronic SNP (TNFR1_27223241, position +11511) gave weak positive signals of association (resp. P=0.03 and P=0.04) as well as two haplotypes. To our knowledge, this is the first genetic association study dealing with the TNFR1 gene in AIDS and the putative associations identified will need to be validated through other AIDS cohort analyses or by further biological experimentation.
Collapse
Affiliation(s)
- Gora Diop
- Equipe génomique, bioinformatique et pathologies du système immunitaire, Inserm EMI0355, 15, rue de l'Ecole-de-Médecine, 75006 Paris, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Diop G, Spadoni JL, Do H, Hirtzig T, Coulonges C, Labib T, Issing W, Rappaport J, Therwath A, Lathrop M, Matsuda F, Zagury JF. Genomic approach of AIDS pathogenesis: exhaustive genotyping of the TNFR1 gene in a French AIDS cohort. Pharmacotherapy 2005. [DOI: 10.1016/j.biopha.2005.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
25
|
de Parseval N, Diop G, Blaise S, Helle F, Vasilescu A, Matsuda F, Heidmann T. Comprehensive search for intra- and inter-specific sequence polymorphisms among coding envelope genes of retroviral origin found in the human genome: genes and pseudogenes. BMC Genomics 2005; 6:117. [PMID: 16150157 PMCID: PMC1236922 DOI: 10.1186/1471-2164-6-117] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Accepted: 09/09/2005] [Indexed: 12/11/2022] Open
Abstract
Background The human genome carries a high load of proviral-like sequences, called Human Endogenous Retroviruses (HERVs), which are the genomic traces of ancient infections by active retroviruses. These elements are in most cases defective, but open reading frames can still be found for the retroviral envelope gene, with sixteen such genes identified so far. Several of them are conserved during primate evolution, having possibly been co-opted by their host for a physiological role. Results To characterize further their status, we presently sequenced 12 of these genes from a panel of 91 Caucasian individuals. Genomic analyses reveal strong sequence conservation (only two non synonymous Single Nucleotide Polymorphisms [SNPs]) for the two HERV-W and HERV-FRD envelope genes, i.e. for the two genes specifically expressed in the placenta and possibly involved in syncytiotrophoblast formation. We further show – using an ex vivo fusion assay for each allelic form – that none of these SNPs impairs the fusogenic function. The other envelope proteins disclose variable polymorphisms, with the occurrence of a stop codon and/or frameshift for most – but not all – of them. Moreover, the sequence conservation analysis of the orthologous genes that can be found in primates shows that three env genes have been maintained in a fully coding state throughout evolution including envW and envFRD. Conclusion Altogether, the present study strongly suggests that some but not all envelope encoding sequences are bona fide genes. It also provides new tools to elucidate the possible role of endogenous envelope proteins as susceptibility factors in a number of pathologies where HERVs have been suspected to be involved.
Collapse
Affiliation(s)
- Nathalie de Parseval
- UMR 8122 CNRS, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, France
| | - Gora Diop
- Centre National de Génotypage, 2, rue Gaston Crémieux, Évry, France
| | - Sandra Blaise
- UMR 8122 CNRS, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, France
| | - François Helle
- UMR 8122 CNRS, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, France
| | | | - Fumihiko Matsuda
- Centre National de Génotypage, 2, rue Gaston Crémieux, Évry, France
| | - Thierry Heidmann
- UMR 8122 CNRS, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, France
| |
Collapse
|
26
|
Do H, Vasilescu A, Diop G, Hirtzig T, Heath SC, Coulonges C, Rappaport J, Therwath A, Lathrop M, Matsuda F, Zagury JF. Exhaustive genotyping of the CEM15 (APOBEC3G) gene and absence of association with AIDS progression in a French cohort. J Infect Dis 2004; 191:159-63. [PMID: 15609224 DOI: 10.1086/426826] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2004] [Accepted: 08/04/2004] [Indexed: 11/03/2022] Open
Abstract
CEM15 (or APOBEC3G) has recently been identified as an inhibitor of human immunodeficiency virus type 1 (HIV-1) replication in vitro. To evaluate the impact of its genetic variations on the progression of acquired immunodeficiency syndrome (AIDS), we have performed an extensive genetic analysis of CEM15. We have sequenced CEM15 in a cohort of 327 HIV-1-seropositive patients with extreme disease progression phenotypes--either slow progression or rapid progression--and in 446 healthy control subjects, all of white descent. We have identified 29 polymorphisms with allele frequencies >1%, 14 of which were newly characterized. There were no significant associations between the polymorphisms or haplotypes of CEM15 and a disease progression phenotype in our cohort.
Collapse
Affiliation(s)
- Hervé Do
- Equipe Genomique, Bioinformatique et Pathologies du Systeme Immunitaire, INSERM EMI0355, 15 rue de l'Ecole de Médecine, 75006 Paris, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Vasilescu A, Heath SC, Diop G, Do H, Hirtzig T, Hendel H, Bertin-Maghit S, Rappaport J, Therwath A, Lathrop GM, Matsuda F, Zagury JF. Genomic analysis of Fas and FasL genes and absence of correlation with disease progression in AIDS. Immunogenetics 2004; 56:56-60. [PMID: 15042330 DOI: 10.1007/s00251-004-0664-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2004] [Revised: 02/26/2004] [Indexed: 10/26/2022]
Abstract
Apoptosis has been suggested as a major mechanism for the CD4(+) T-lymphocyte depletion observed in patients infected with human immunodeficiency virus 1 (HIV-1). To evaluate the impact of genetic variations to apoptosis during progression of acquired immunodeficiency syndrome (AIDS), we have performed an extensive genetic analysis of Fas and Fas ligand ( FasL) genes. The coding regions and promoters of these genes were resequenced in a cohort of 212 HIV-1-seropositive patients presenting extreme disease phenotypes and 155 healthy controls of Caucasian origin. Overall, 33 single nucleotide polymorphisms (SNPs) with an allele frequency >1% were identified and evaluated for their association with disease progression. Among them, 14 polymorphisms were newly characterized. We did not find any statistically significant association of Fas and FasL polymorphisms and haplotypes with AIDS progression.
Collapse
Affiliation(s)
- A Vasilescu
- Centre National de Génotypage, 2 rue Gaston Crémieux, 91000 Evry, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Vallat JM, Dumas M, Grunitzky EK, Akani F, Diop G, Ramiandrisoa H, Denis F. Lack of association between peripheral neuropathy and HTLV-I infection in west Africa. Epidemiological, serological and nerve biopsy study. J Neurol Sci 1993; 119:141-5. [PMID: 8277327 DOI: 10.1016/0022-510x(93)90126-j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Patients (n = 1166) with various neurological disorders hospitalized in Dakar, Abidjan, Lomé and Ouagadougou were examined prospectively over a 42-month period. Seropositivity for HTLV-I alone was found to be 1.8%, which is comparable to that estimated for the general population in Africa. Eighteen of the patients with TSP and only 5 with PN were HTLV-I positive, but co-infections were found in 30-40% of cases. Discrete and unspecific lesions were observed on light and electron microscopic examination of peripheral nerve biopsies from 11 patients. Since spastic paraparesis emerges as the disorder containing the largest number of HTLV-I-positive individuals, it may be premature to conclude that HTLV-I is a causal agent in PN. Nevertheless, their rarity and the frequency of retroviral co-infections distinguish these cases of African HTLV-I-associated myelopathy from comparable cases observed in other parts of the world.
Collapse
Affiliation(s)
- J M Vallat
- Department of Neurology, Faculty of Medicine, University Hospital, Limoges, France
| | | | | | | | | | | | | |
Collapse
|
29
|
Koaté P, Ndiaye IP, Diouf S, Sylla M, Diop G, Sarr M, Ba SA. [Diabetic macroangiopathy in Senegalese]. Ann Cardiol Angeiol (Paris) 1982; 31:235-40. [PMID: 7125568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
30
|
Koate P, Diouf S, Sylla M, Diop G. [Diabetes mellitus and ischemic cardiopathies in the Senegalese]. Dakar Med 1981; 26:347-356. [PMID: 7338132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|