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Can Plasmodium falciparum Induce Homocysteinemia in Malaria Patients?

Journal of Biosciences and Medicines 2022年第5期10卷 117-128页

作者： Noé Yaméogo Abdoul Karim ouattara Bapio Valérie Bazié alfred rakissida ouédraogo Florencia Wendkuuni Djigma Jacques Simporé Laboratoire de Biologie Moléculaires et de Génétique (LABIOGENE) UFR-SVT Université Joseph KI-ZERBO Ouagadougou Burkina Faso Centre Hospitalier Universitaire de Bogodogo Ouagadougou Burkina Faso Centre de Recherche Biomoléculaire Pietro Annigoni (CERBA) Ouagadougou Burkina Faso Université Norbert Zongo (UNZ) Centre Universitaire de Manga Koudougou Burkina Faso Centre National de Recherche Scientifique et Technologique Ouagadougou Burkina Faso UFR-SDS Université Joseph KI-ZERBO Ouagadougou Burkina Faso

Background: Plasmodium falciparum has developed elaborate strategies to survive in the hostile intracellular environment of the infected host cell, including resistance to oxidative stress. Cysteine is a metabolic product of homocysteine and a precursor of the antioxidant glutathione used by Plasmodium falciparum to escape harmful oxidation. Objectives: In the present study we aimed to assess whether Plasmodium falciparum can induce homocysteinemia in malaria patients of Burkina Faso. Methods: Eighty-five (85) individuals including 25 affected by severe malaria, 44 by simple malaria, and 12 negative controls for P. falciparum infection were included in the present study. An enzymatic assay of plasma homocysteinemia was performed using the Homocysteine Enzymatic Assay reagent (ref 05385415 190) on the Roche/ Hitachi Cobas c. Results: The results of the present study show that the mean plasma homocysteine concentrations were 15.1 ± 8.4 μmol/L among patients with severe malaria, 14.0 ± 6.0 μmol/L in patients with uncomplicated malaria, and 12.6 ± 4.1 μmol/L in negative controls for malaria parasite. Conclusions: our findings suggest high homocysteinemia in malaria patients, especially in those with severe malaria. Monitoring homocysteinemia in the latter group will be useful to avoid complications when an elevated plasma level of homocysteine is a known risk factor for cardiovascular diseases.

关键词： Homocysteine Malaria Burkina Faso

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Effect of Fertilization on the Dynamics and Activity of Iron-Reducing Bacterial Populations in a West African Rice Paddy Soil Planted with Two Rice Varieties: Case Study of Kou Valley in Burkina Faso

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Journal of Environmental Protection 2016年第8期7卷 1119-1131页

作者： Cè cile Harmonie Otoidobiga Adama Sawadogo Yapi Sinarè Ibrahima ouè draogo Prosper Zombrè Susumu Asakawa alfred S. Traore Dayè ri Dianou Research Center for Biological Alimentary and Nutritional Sciences Research and Training Unit Life and Earth Sciences University of Ouagadougou Ouagadougou Burkina Faso Institute of Environment and Agricultural Research Bobo Dioulasso Burkina Faso Laboratory of Soil-Materials and Environment Research and Training Unit Life and Earth Sciences University of Ouagadougou Ouagadougou Burkina Faso Soil Biology and Chemistry Graduate School of Bio-Agricultural Sciences Nagoya University Chikusa Nagoya Japan National Center for Sciences and Technology Research Ouagadougou Burkina Faso

Iron toxicity is a major stress to rice caused by a high concentration of reduced iron, in the soil in many lowlands worldwide. To reduce iron toxicity in the West African lowlands, an investigation was performed at the site of the University of ouagadougou, in pots containing an iron toxic soil from the Kou Valley (West of Burkina Faso). The experiment objective was to study the effect of mineral fertilizer on Iron Reducing Bacteria (IRB) dynamics and activity during rice cultivation, iron accumulation in rice plant and rice biomass yield under iron toxicity conditions. BouAKE-189 and ROK-5 rice varieties, sensitive and tolerant to iron toxicity, respectively, were used for the experiment. The pots were amended with chemical fertilizers (NPK + Urea and NPK + Urea + Ca + Mg + Zn complex). Control pots without fertilization were prepared similarly. The kinetics of IRB and ferrous iron content in soil near rice roots were monitored throughout the cultural cycle using MPN and colorimetric methods, respectively. The total iron content was evaluated in rice plant using spectrometric method. Data obtained were analyzed in relation to fertilization mode, rice growth stage and rice yield using the student’s t-test and XLSTAT 2014 statistical software. The experiment revealed that NPK + Urea and NPK + Urea + Ca + Mg + Zn fertilization, decreased significantly (p ouAKE-189 rice varieties. In most pots, highest IRB densities and ferrous iron content in soil were recorded from rice tillering and flowering to maturity stages, indicating that rice plants promoted microbial processes and iron reduction in soil. From the study, the NPK + Urea amendment decreased significantly ferrous iron content (p ouAKE-189 and ROK-5 rice varieties roots relatively to control pots. However, NPK + Urea + Ca + Zn + Mg amendment increased significantly ferrous iron content (p < 0.0001) in the soil near roots, Fe accumulation in pla

关键词： Iron-Reducing Bacteria Rice Iron Toxicity Fertilization

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Effect of Combined Application of Subsurface Drainage and Mineral Fertilization on Iron-Reducing Bacterial Populations’ Developments and Fe²⁺Uptake by Two Rice Varieties in an Iron Toxic Paddy Soil of Burkina Faso (West Africa)

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Agricultural Sciences 2016年第11期7卷 783-804页

作者： Cécile Harmonie Otoidobiga Honoré Kam Adama Bagayogo Aboubacar Savadogo Joseph B. Sawadogo Sayouba Sawadogo Adama Sawadogo Yapi Sinaré Ibrahima ouédraogo Prosper Zombré Susumu Asakawa alfred S. Traoré Dayéri Dianou Research Center for Biological Alimentary and Nutritional Sciences Research and Training Unit Life and Earth Sciences University of Ouagadougou Ouagadougou Burkina Faso Institute of Environment and Agricultural Research Bobo-Dioulasso Burkina Faso National Center for Sciences and Technology Research Ouagadougou Burkina Faso Laboratory of Soil-Materials and Environment Research and Training Unit Life and Earth Sciences University of Ouagadougou Ouagadougou Burkina Faso Soil Biology and Chemistry Graduate School of Bioagri Cultural Sciences Nagoya University Nagoya Japan

Rice is one of the staple crops in Burkina Faso. However, the local production covers only 47% of the population demands. One of the main reasons of the poor productivity in Burkina Faso is iron toxicity which is related mainly to the activity of Iron Reducing Bacteria in the rice field’s ecosystems. In order to control the harmful effects of Iron Reducing Bacterial populations and to improve rice productivity, a pots experiment was conducted at the experimental site of the University ouaga I Pr. Joseph KI-ZERBO. An iron toxic soil from Kou Valley (West of Burkina Faso) and two rice varieties, BouAKE-189 and ROK-5, sensitive and tolerant to iron toxicity, respectively, were used for the experiment. The pots were drained for 14 days (D2) and amended with chemical fertilizers (NPK + Urea and NPK + Urea + Ca + Mg + Zn complexes). Control pots without drainage and fertilization (D0/NF) were prepared similarly. The kinetics of Iron Reducing Bacterial populations and ferrous iron content in soil near rice roots were monitored throughout the cultural cycle using MPN and colorimetric methods, respectively. The total iron content was evaluated in rice plant using a spectrometric method. Data obtained were analyzed in relation to drainage and fertilization mode, rice growth stage and rice yield using the Student’s t-test and XLSTAT 2014 statistical software. The experiment showed that the combined application of subsurface drainage and NPK + Urea + Ca + Mg + Zn fertilization, reduced significantly the number of IRB in the soil near rice roots for both rice varieties (p = 0.050 and p = 0.020) increased the leaf tissue tolerance to excess amounts of Fe, and rice yield.

关键词： Iron Reducing Bacteria Rice Variety Iron Uptake Subsurface Drainage Fertilization

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