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Kouriba B, Arama C, Ouologuem DT, Cissoko Y, Diakite M, Beavogui AH, Wele M, Tekete M, Fofana B, Dama S, Maiga H, Kone A, Niangaly A, Diarra I, Daou M, Guindo A, Traore K, Coulibaly D, Kone AK, Dicko A, Clark TG, Doumbo OK, Djimde A. IFNγ, TNFα polymorphisms and IFNγ serum levels are associated with the clearance of drug-resistant P. falciparum in Malian children. Cytokine 2023; 164:156137. [PMID: 36773528 DOI: 10.1016/j.cyto.2023.156137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/11/2023]
Abstract
Host immunity has been suggested to clear drug-resistant parasites in malaria-endemic settings. However, the immunogenetic mechanisms involved in parasite clearance are poorly understood. Characterizing the host's immunity and genes involved in controlling the parasitic infection can inform the development of blood-stage malaria vaccines. This study investigates host regulatory cytokines and immunogenomic factors associated with the clearance of Plasmodium falciparum carrying a chloroquine resistance genotype. Biological samples from participants of previous drug efficacy trials conducted in two Malian localities were retrieved. The P. falciparum chloroquine resistance transporter (Pfcrt) gene was genotyped using parasite DNA. Children carrying parasites with the mutant allele (Pfcrt-76T) were classified based on their ability to clear their parasites. The levels of the different cytokines were measured in serum. The polymorphisms of specific human genes involved in malaria susceptibility were genotyped using human DNA. The prevalence of the Pfcrt-76T was significantly higher in Kolle than in Bandiagara (81.6 % vs 38.6 %, p < 10-6). The prevalence of children who cleared their mutant parasites was significantly higher in Bandiagara than in Kolle (82.2 % vs 67.4 %, p < 0.05). The genotyping of host genes revealed that IFN-γ -874 T and TNF-α -308A alleles were positively associated with parasite clearance. Cytokine profiling revealed that IFN-γ level was positively associated with parasite clearance (p = 0.04). This study highlights the role of host's immunity and immunogenetic factors to clear resistant parasites, suggesting further characterization of these polymorphisms may help to develop novel approaches to antiparasitic treatment strategies.
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Affiliation(s)
- Bourema Kouriba
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali; Centre d'Infectiologie Charles Mérieux-Mali, Mali.
| | - Charles Arama
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Dinkorma T Ouologuem
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Yacouba Cissoko
- Department of Infectious and Tropical Diseases, Point G Teaching Hospital, Bamako, Mali
| | - Mahamadou Diakite
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Abdoul Habib Beavogui
- Maferinyah National Training and Research Center in Rural Health, Forecariah, Guinea
| | - Mamadou Wele
- Institute of Applied Sciences, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Mamadou Tekete
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Bakary Fofana
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Souleymane Dama
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Hamma Maiga
- Institut National de Santé Publique, Bamako, Mali
| | - Aminatou Kone
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Amadou Niangaly
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Issa Diarra
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Modibo Daou
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Ando Guindo
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Karim Traore
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Drissa Coulibaly
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Abdoulaye K Kone
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Alassane Dicko
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Taane G Clark
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, Keppel St., London WC1E 7HT, UK; Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel St, London WC1E 7HT, UK
| | - Ogobara K Doumbo
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali
| | - Abdoulaye Djimde
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies, Bamako, Mali.
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Krishnan R, Jang YS, Kim JO, Oh MJ. Altered expression of immune factors in sevenband grouper, Hyporthodus septemfasciatus following nervous necrosis virus challenge at optimal and suboptimal temperatures. FISH & SHELLFISH IMMUNOLOGY 2021; 119:442-451. [PMID: 34699974 DOI: 10.1016/j.fsi.2021.10.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/24/2021] [Accepted: 10/22/2021] [Indexed: 06/13/2023]
Abstract
The nervous necrosis virus (NNV) infection is generally observed in aquafarms when the seawater temperature is higher than 24 °C and the fishes seem to be refractory to disease at suboptimal temperatures below 20 °C suggesting a role of thermoregulation in NNV pathogenesis. The present study profiled the temperature-dependent regulation of cytokines (TNF-α, IL-1β and IFN-γ), innate antiviral factors (IFN-1, Mx, ISG-15), adaptive immune factors (CD-4, CD-8, IgM), signaling regulators (SOCS-1, SOCS-3), transcription factors (STAT-1, STAT-3) and microglial and NCC/NK specific cell markers (TMEM-119 and NCCRP-1) during NNV challenge in seven-band grouper, Hyporthodus septemfasciatus. The co-habitation challenge at 17 °C with showed a sustained expression of proinflammatory cytokines and following rechallenge with a dose of 104 TCID50/100μL/fish at optimal temperature, the survivors also exhibited a stable expression of immune factors. The 100% survival following the challenge at sub-optimal (17 °C) and rechallenge at optimal (25 °C) was due to the stable and sustained activation of the immune response. However, at 25 °C, the rechallenge displayed a priming effect with hyperactivation of the immune system evident from the immune gene expression profile. The mortality pattern observed is co-related with the cytokine storm as is evident from the gene expression profile. Whereas, neither of the adaptive immune markers was suggestive of humoral immune response in the 17 °C groups. Also, the data suggest a possible role of NK cell and microglia in mediating antiviral immune response following infection in the brain at different temperatures, where, former is beneficial in restricting viral infection with higher host tolerance.
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Affiliation(s)
- Rahul Krishnan
- Department of Aqualife Medicine, Chonnam National University, Yeosu, Republic of Korea
| | - Yo-Seb Jang
- Department of Aqualife Medicine, Chonnam National University, Yeosu, Republic of Korea
| | - Jong-Oh Kim
- Department of Microbiology, Pukyong National University, Busan, Republic of Korea
| | - Myung-Joo Oh
- Department of Aqualife Medicine, Chonnam National University, Yeosu, Republic of Korea.
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The effect of anemia on the efficacy and safety of treating chronic hepatitis C infection with direct-acting antivirals in patients with chronic kidney disease. Int Urol Nephrol 2020; 53:749-761. [PMID: 33111161 DOI: 10.1007/s11255-020-02656-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 09/14/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND/AIM Chronic hepatitis-C infection is a great health burden in Egypt. The effect of anemia on the efficacy and safety of direct-acting anti-viral (DAA) therapies for those with chronic-kidney disease (CKD) has not been evaluated. PATIENTS/METHODS This single-center retrospective study included 235 renal patients: i.e., 70-CKD patients not on hemodialysis (42 with anemia, 28 without); 40 hemodialysis patients (16 anemic; 24 non-anemic), and 125 kidney-transplant (KTx) recipients (40 anemic; 85 non-anemic). Anemia was defined by a hemoglobin level < 10.5 g/dL. Hemodialysis patients received ritonavir-boosted paritaprevir/ombitasvir. KTx patients received sofosbuvir/daclatasvir. CKD patients with eGFR > 30 mL/min/1.73 m2 received sofosbuvir/daclatasvir. Those with eGFR < 30 mL/min/1.73 m2 received ritonavir-boosted paritaprevir/ombitasvir; 64 non-anemic patients also received ribavirin therapy. RESULTS Mean age of CKDs was 49.1 years, 43.2 years for HDs, and 45.2 years for KTx patients. Most were male; body-mass index was ~ 23.8. Anemia did not affect the efficacy of DAAs in hemodialysis, CKD, or KTx patients. Most patients achieved a rapid virologic response (RVR), and a 12- and 24-week sustained viral response. Worsening of anemia among the non-anemic group was mostly related to ribavirin therapy in hemodialysis patients (11/16 patients). Acute kidney injury in CKDs occurred more frequently within the anemic group (59.5%) compared to the non-anemic group (32.1%). For KTx, graft impairment was more common among the anemic group (7/40) compared to the non-anemic group (2/85). CONCLUSION Hemoglobin levels of < 10.5 g/dL prior to DAA treatment did not affect the virological response in renal patients but was associated with increased serum creatinine among KTx and those with CKD.
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