Background: In 2019, the WHO estimated that over 296 million people were living with chronic hepatitis B virus (HBV) infection and over 820,000 deaths attributable to hepatitis B. Most people living with HBV are unawa...Background: In 2019, the WHO estimated that over 296 million people were living with chronic hepatitis B virus (HBV) infection and over 820,000 deaths attributable to hepatitis B. Most people living with HBV are unaware of their immune status and live in endemic areas. This is the case of Benin and Senegal, which have little data on the disease. Objective: This study aimed to provide epidemiological furthers on hepatitis B in Dakar and Cotonou according to WHO recommendations about “obtaining data for action”. Materials and Methods: Our study took place at the Medical Biology Laboratory of the Idrissa Pouye General Hospital (LBM-HOGIP) in Dakar, Senegal. Participants were selected at the LBM-HOGIP of Dakar or at the LBMs of the health centres of the Archdiocese of Cotonou respectively from November to December 2019 and February to March 2020. All participants were tested for hepatitis B virus antigen (HBsAg) using a microparticle chemiluminescence immunoassay assay. Other risk factors including blood transfusion, haemodialysis, tattooing, cultural or clan scarification, piercing, injecting drug use, unprotected sex and surgical procedures were also investigated. Informed consent was obtained from each participant. The study was approved by the ethics committees in Senegal and Benin. For the biological tests, Excel and IBM SPSS Statistics software were used for the analysis of the results. Results: A total of 470 participants were recruited including 234 in Cotonou and 236 in Dakar. The median age in Cotonou was 29 years with extremes of 10 and 65 years, and 38 years in Dakar with extremes of 6 and 93 years. The prevalence of HBsAg was 12.39% in Cotonou and 19.91% in Dakar. The most affected age groups were 20 - 29 in Dakar and 30 - 39 in Cotonou. Except for piercing, none of the other risk factors considered in our study were found to be associated with HBV transmission in our populations. Conclusion: Our study is hospital-based and revealed high prevalence of HBsAg. These prevalences were higher in men.展开更多
Background: According to WHO estimates, by 2022 over 296 million people are living with chronic hepatitis B virus (HBV) infection, and over 820,000 have died from complications. In sub-Saharan African countries such a...Background: According to WHO estimates, by 2022 over 296 million people are living with chronic hepatitis B virus (HBV) infection, and over 820,000 have died from complications. In sub-Saharan African countries such as Benin and Senegal, few research studies have addressed the issue of HBV immunization. Objective: The main objective of this study was to evaluate immunization against the hepatitis B virus in populations residing in Cotonou and Dakar by titrating anti-HBs antibodies (Ab) and detecting total anti-HBc immunoglobulins (Ig). Materials and Methods: This was a prospective, descriptive, analytical study of two West African populations recruited in Dakar at the Laboratory of Medical Biology (LBM) of the General Hospital Idrissa Pouye (HOGIP) and in Cotonou at the LBMs of the health centres of the Cotonou archdiocese. HBsAg-negative patients constituted our study population. The study took place in November-December 2019 for Dakar and February-March 2020 for Cotonou. Anti-HBs antibodies were tested and titrated. In the event of anti-HBs positivity, total anti-HBc was determined. A microparticle chemiluminescence immunoassay was used for marker determination. The detection threshold was 2.50 IU/L for anti-HBs. Excel and IBM SPSS Statistics software were used for data analysis. Subjects’ sociodemographic characteristics were collected using a questionnaire, as was knowledge of their vaccination status. The study was approved by the ethics committees in Benin and Senegal. Results: A total of 394 HBs antigen-negative participants were recruited: 205 in Cotonou and 189 in Dakar. The population was predominantly female, with 65.36% (N = 134) and 57.14% (N = 108) women in Cotonou and Dakar respectively. The median age of participants was 29 years in Cotonou, with extremes of 10 and 65 years, versus 39 years in Dakar, with extremes of 6 and 93 years. Some participants claimed to be unaware of their vaccination status: 33.17% in Cotonou and 56.61% in Dakar. The total prevalence of anti-HBs-positive subjects was 88.78% (N = 182) in Cotonou and 98.41% (N = 186) in Dakar. In Cotonou (N = 205), 35.61% (N = 73) of subjects had protective anti-HBs levels between 11.60 IU/L and 10,000 IU/L. In Dakar, 61.38% (N = 116) of subjects had protective HBV immunity, with anti-HBs titres ranging from 10.30 IU/L to 11357 IU/L. In Cotonou, 80.82% (N = 59) of immunized subjects (N = 73) had anti-HBC antibodies, compared with 84.48% (N = 98) of immunized individuals (N = 116) in the population recruited in Dakar, indicating immunization following HBV infection. Conclusion: Our study involved a predominantly female population, many of whom were unaware of their serological status. Vaccination policies and knowledge of the viral hepatitis B epidemic need to be strengthened.展开更多
Objective: Despite the existence of several therapeutic strategies, the management of cervical cancer remains challenging. Our region has very little data on the interaction between the immune system and the clinical ...Objective: Despite the existence of several therapeutic strategies, the management of cervical cancer remains challenging. Our region has very little data on the interaction between the immune system and the clinical response to chemotherapy. This work examines plasma levels of galectin-3 (Gal-3) and percentages of activated T cells in patients with cervical cancer treated with chemotherapy and investigates if there is a relationship between the rates of these two elements. Methods: We compared data from 37 patients with cervical cancer undergoing chemotherapy and 42 controls with normal cervical cytology. Plasma Gal-3 concentrations were assessed by ELISA and expression of activation markers by T cells (CD69 and HLA-DR) was assessed by flow cytometry at three different time points during chemotherapy. Results: Our results showed that patients had a significantly higher concentration of Gal-3 compared to controls (4.025 vs. 1.340, p 0.001), similarly, they had a significantly high percentage of activated lymphocytes (2.610 vs. 0.731;p 0.0001). According to the response to treatment, patients with no response to treatment had a lower concentration of circulating Gal-3 but had approximately the same percentage of activated CD4 and CD8 lymphocytes as patients with a partial or total response. In addition, we found a positive correlation between the Gal-3 level and CD4 T cells expressing the activation marker CD69 (p 0.05;rho = 0.44). Conclusion: In conclusion, our results show that there would be a relationship between circulating galectin-3 and the percentage of peripheral CD4+</sup>CD69+</sup> cells in cervical cancer.展开更多
Background and Objectives: Cervical cancer is a leading cause of cancer death in female populations. It is a virally induced carcinoma resulting from sexually transmitted high risk Human Papillomavirus infections (e.g...Background and Objectives: Cervical cancer is a leading cause of cancer death in female populations. It is a virally induced carcinoma resulting from sexually transmitted high risk Human Papillomavirus infections (e.g. HPV-16, HPV-18). Previous studies have shown associations between IL-17A levels in cancer micro-environments and metastasis of tumor cells. In Africa, chemotherapy (CT) is the standard first-line treatment for cervical cancer and the prognosis remains poor for metastatic and recurrent cases. The impact of CT as a treatment option is still unclear. We investigated the prognostic relevance of IL-17A profiles in Cervical cancer patients (CP) patients treated with cisplatin in combination with 5-fluouracil (5FU) for three cycles. Methods: The study included 57 CP and 59 women with no history of malignancy as healthy controls (HC). IL-17A plasma levels were evaluated by ELISA. For each CP, three blood samples were collected at three-week intervals before initiation of the chemotherapy protocol. Results: Before chemotherapy CP showed higher serum levels of IL-17A compared to HCs (p = 0.035). No relation was detected between age and IL-17A levels. We observed a significant increase in serum IL-17A during treatment of the CP group (p Conclusion: Our results suggest that high serum levels of IL-17A are associated with poor responses to classical chemotherapy. However, considering these results to design CC biomarkers, we need further investigations particularly about the relevant prognostic indicator following chemotherapy.展开更多
Objective: Evaluate the immunological status to hepatitis B virus of Senegalese pregnant women by screening HBs antigen. Material and methods: The selection criteria of women were presence at the laboratory for biolog...Objective: Evaluate the immunological status to hepatitis B virus of Senegalese pregnant women by screening HBs antigen. Material and methods: The selection criteria of women were presence at the laboratory for biological exams of pregnancy follow-up. All volunteers for the study were screened for HBs antigen (HBs Ag). Investigation of chronic hepatitis B markers (HBe Ag, anti-HBe, viral quantification) was performed in HBs Ag positive participants. The concentration of anti-HBs antibodies was assessed in HBs Ag negative women. Results: One hundred and fifteen (115) pregnant women were included in the study from July to October 2014. The mean age was 29 ± 6 years, ranging from 16 to 47. The seroprevalence of HBs Ag was 12% and the majority of women (90%) were not vaccinated. Any of the 14 HBs Ag-positive subjects did not express serum HBe Ag, (marker of active viral replication) and all were positive for anti-HBe antibodies. Their viral load (HBV DNA) was undetectable and serum transaminases were normal. The anti-HBs antibodies titrated in HBs-Ag negative women serum revealed that only 46 had protective levels against HBV whilst 55 of them were unprotected.展开更多
Cervical cancer is the leading cause of cancer deaths of women in developing world. Several studies demonstrated evidences of inflammatory cytokines implication in cancer progression including in initiation, promotion...Cervical cancer is the leading cause of cancer deaths of women in developing world. Several studies demonstrated evidences of inflammatory cytokines implication in cancer progression including in initiation, promotion and invasion by affecting the immune surveillance. Our aim was to measure blood circulating pro- and anti-inflammatory cytokines levels, their profiles according to treatment issue and relation with prognostic factors in cervical cancer during chemotherapy. Blood samples were collected from a cohort of 35 cervical cancer women and 42 women healthy controls (HC) with no history of malignancy. For each CP, three samples were taken at three-week intervals. The first one (S1) was taken before initiation of the chemotherapy protocol. S2 and S3 were samples collected respectively at day 21 and day 42. Cytokines levels were evaluated by ELISA. Mean age of patients was 54.1 year (35 - 77 yo). In groups, no relation was observed between age and cytokines levels. Before chemotherapy, high levels of IL-6, IL-4 and IFN-γ were observed in CP compared to HC (p 0.001) and at the same period, IL-10 and TNF-α levels were significantly low in CP (p 0.05) and negatively correlated (r = —0.79;p = 0.017). In this CP group, IL-4 levels were positively correlated between S1 and S2 (r = 0.72;p = 0.002) and between S1 and S3 (r = 0.74;p = 0.019). Similar correlations were observed for TNF-α levels: S1/S2 (r = 0.54;p = 0.027), S2/S3 (r = 0.82;p = 0.009) and S1/S3 (r = 0.66;p = 0.036) with a significant increase of TNF-α in blood during treatment. Depending on chemotherapy’s efficacy, CP patients were separated into 1) non responders (NR), 2) partial responders (PR) and 3) good responders (GR). Compared to PR and GR groups, NR patients showed: a) higher serum levels of IL-6, IL-10 and IFN-γ during the follow-up and b) lower serum levels of IL-4 and TNF-α. In addition, serum levels of IL-4 were significantly higher in GR patients however TNF-α was the predominant cytokines in PR group. Our results highlight the variation of circulating cytokines such as IL-6, IL-10 and IFN-γ during cervical cancer chemotherapy. In addition, this study suggested that IL-4 and TNF-α might represent potential biomarkers candidate in cervical cancer. Applications in cancer management need further investigations particularly about the relevant prognostic indicator following chemotherapy and validation studies must provide more assurance for translation into clinical practice.展开更多
We investigated relationship between galectin-3 (Gal-3) levels and T lymphocytes apoptosis and the activation rates in breast cancer during chemotherapy. We used plasma samples from 112 women classified into two group...We investigated relationship between galectin-3 (Gal-3) levels and T lymphocytes apoptosis and the activation rates in breast cancer during chemotherapy. We used plasma samples from 112 women classified into two groups: 70 women with breast cancer (BC) and submitted to neoadjuvant chemotherapy (3 cycles) and 42 healthy women used as controls. In the group of BC, blood samples were taken before each cycle of chemotherapy and Gal-3 levels was evaluated by ELISA sandwich. Flow cytometry was used to study T cells apoptosis and activation. Before treatment, median value of Gal-3 was 6.31 ng/ml (range 1.07 - 50.74) in BC and 0.84 ng/ml (range 0.00 - 4.82) in HC. Gal-3 levels were highest in plasmas from BC (p p p = 0.010). In addition, we found a dynamic relationship between gal-3 levels, tumor size and T lymphocytes apoptosis rates during treatment depending to the cure efficiency. We suggest gal-3 plasma concentrations could be used as predictive biomarker for chemotherapy efficiency in breast cancer patients.展开更多
Malaria caused by the Plasmodium falciparum parasite is responsible for more than 240 million cases per year and killed 627,000 people in 2020,mostly African children.The malaria parasite is transmitted by mosquitos b...Malaria caused by the Plasmodium falciparum parasite is responsible for more than 240 million cases per year and killed 627,000 people in 2020,mostly African children.The malaria parasite is transmitted by mosquitos belonging to the genus Anopheles.After an asymptomatic liver stage,the parasite is released into the bloodstream to invade red blood cells(RBCs)and replicate asexually.This erythrocytic phase is associated with a variety of clinical manifestations,including mild and severe malaria.Cerebral malaria(CM)is one of the most severe forms,characterized by the sequestration of parasitized RBCs in the small capillaries of the brain and the local development of cytokine-mediated inflammation.Genetic variants in genes encoding proteins involved in red blood cell physiology are protective factors against severe malaria,as clearly demonstrated for the sickle cell variant of hemoglobin(HbS).展开更多
文摘Background: In 2019, the WHO estimated that over 296 million people were living with chronic hepatitis B virus (HBV) infection and over 820,000 deaths attributable to hepatitis B. Most people living with HBV are unaware of their immune status and live in endemic areas. This is the case of Benin and Senegal, which have little data on the disease. Objective: This study aimed to provide epidemiological furthers on hepatitis B in Dakar and Cotonou according to WHO recommendations about “obtaining data for action”. Materials and Methods: Our study took place at the Medical Biology Laboratory of the Idrissa Pouye General Hospital (LBM-HOGIP) in Dakar, Senegal. Participants were selected at the LBM-HOGIP of Dakar or at the LBMs of the health centres of the Archdiocese of Cotonou respectively from November to December 2019 and February to March 2020. All participants were tested for hepatitis B virus antigen (HBsAg) using a microparticle chemiluminescence immunoassay assay. Other risk factors including blood transfusion, haemodialysis, tattooing, cultural or clan scarification, piercing, injecting drug use, unprotected sex and surgical procedures were also investigated. Informed consent was obtained from each participant. The study was approved by the ethics committees in Senegal and Benin. For the biological tests, Excel and IBM SPSS Statistics software were used for the analysis of the results. Results: A total of 470 participants were recruited including 234 in Cotonou and 236 in Dakar. The median age in Cotonou was 29 years with extremes of 10 and 65 years, and 38 years in Dakar with extremes of 6 and 93 years. The prevalence of HBsAg was 12.39% in Cotonou and 19.91% in Dakar. The most affected age groups were 20 - 29 in Dakar and 30 - 39 in Cotonou. Except for piercing, none of the other risk factors considered in our study were found to be associated with HBV transmission in our populations. Conclusion: Our study is hospital-based and revealed high prevalence of HBsAg. These prevalences were higher in men.
文摘Background: According to WHO estimates, by 2022 over 296 million people are living with chronic hepatitis B virus (HBV) infection, and over 820,000 have died from complications. In sub-Saharan African countries such as Benin and Senegal, few research studies have addressed the issue of HBV immunization. Objective: The main objective of this study was to evaluate immunization against the hepatitis B virus in populations residing in Cotonou and Dakar by titrating anti-HBs antibodies (Ab) and detecting total anti-HBc immunoglobulins (Ig). Materials and Methods: This was a prospective, descriptive, analytical study of two West African populations recruited in Dakar at the Laboratory of Medical Biology (LBM) of the General Hospital Idrissa Pouye (HOGIP) and in Cotonou at the LBMs of the health centres of the Cotonou archdiocese. HBsAg-negative patients constituted our study population. The study took place in November-December 2019 for Dakar and February-March 2020 for Cotonou. Anti-HBs antibodies were tested and titrated. In the event of anti-HBs positivity, total anti-HBc was determined. A microparticle chemiluminescence immunoassay was used for marker determination. The detection threshold was 2.50 IU/L for anti-HBs. Excel and IBM SPSS Statistics software were used for data analysis. Subjects’ sociodemographic characteristics were collected using a questionnaire, as was knowledge of their vaccination status. The study was approved by the ethics committees in Benin and Senegal. Results: A total of 394 HBs antigen-negative participants were recruited: 205 in Cotonou and 189 in Dakar. The population was predominantly female, with 65.36% (N = 134) and 57.14% (N = 108) women in Cotonou and Dakar respectively. The median age of participants was 29 years in Cotonou, with extremes of 10 and 65 years, versus 39 years in Dakar, with extremes of 6 and 93 years. Some participants claimed to be unaware of their vaccination status: 33.17% in Cotonou and 56.61% in Dakar. The total prevalence of anti-HBs-positive subjects was 88.78% (N = 182) in Cotonou and 98.41% (N = 186) in Dakar. In Cotonou (N = 205), 35.61% (N = 73) of subjects had protective anti-HBs levels between 11.60 IU/L and 10,000 IU/L. In Dakar, 61.38% (N = 116) of subjects had protective HBV immunity, with anti-HBs titres ranging from 10.30 IU/L to 11357 IU/L. In Cotonou, 80.82% (N = 59) of immunized subjects (N = 73) had anti-HBC antibodies, compared with 84.48% (N = 98) of immunized individuals (N = 116) in the population recruited in Dakar, indicating immunization following HBV infection. Conclusion: Our study involved a predominantly female population, many of whom were unaware of their serological status. Vaccination policies and knowledge of the viral hepatitis B epidemic need to be strengthened.
文摘Objective: Despite the existence of several therapeutic strategies, the management of cervical cancer remains challenging. Our region has very little data on the interaction between the immune system and the clinical response to chemotherapy. This work examines plasma levels of galectin-3 (Gal-3) and percentages of activated T cells in patients with cervical cancer treated with chemotherapy and investigates if there is a relationship between the rates of these two elements. Methods: We compared data from 37 patients with cervical cancer undergoing chemotherapy and 42 controls with normal cervical cytology. Plasma Gal-3 concentrations were assessed by ELISA and expression of activation markers by T cells (CD69 and HLA-DR) was assessed by flow cytometry at three different time points during chemotherapy. Results: Our results showed that patients had a significantly higher concentration of Gal-3 compared to controls (4.025 vs. 1.340, p 0.001), similarly, they had a significantly high percentage of activated lymphocytes (2.610 vs. 0.731;p 0.0001). According to the response to treatment, patients with no response to treatment had a lower concentration of circulating Gal-3 but had approximately the same percentage of activated CD4 and CD8 lymphocytes as patients with a partial or total response. In addition, we found a positive correlation between the Gal-3 level and CD4 T cells expressing the activation marker CD69 (p 0.05;rho = 0.44). Conclusion: In conclusion, our results show that there would be a relationship between circulating galectin-3 and the percentage of peripheral CD4+</sup>CD69+</sup> cells in cervical cancer.
文摘Background and Objectives: Cervical cancer is a leading cause of cancer death in female populations. It is a virally induced carcinoma resulting from sexually transmitted high risk Human Papillomavirus infections (e.g. HPV-16, HPV-18). Previous studies have shown associations between IL-17A levels in cancer micro-environments and metastasis of tumor cells. In Africa, chemotherapy (CT) is the standard first-line treatment for cervical cancer and the prognosis remains poor for metastatic and recurrent cases. The impact of CT as a treatment option is still unclear. We investigated the prognostic relevance of IL-17A profiles in Cervical cancer patients (CP) patients treated with cisplatin in combination with 5-fluouracil (5FU) for three cycles. Methods: The study included 57 CP and 59 women with no history of malignancy as healthy controls (HC). IL-17A plasma levels were evaluated by ELISA. For each CP, three blood samples were collected at three-week intervals before initiation of the chemotherapy protocol. Results: Before chemotherapy CP showed higher serum levels of IL-17A compared to HCs (p = 0.035). No relation was detected between age and IL-17A levels. We observed a significant increase in serum IL-17A during treatment of the CP group (p Conclusion: Our results suggest that high serum levels of IL-17A are associated with poor responses to classical chemotherapy. However, considering these results to design CC biomarkers, we need further investigations particularly about the relevant prognostic indicator following chemotherapy.
文摘Objective: Evaluate the immunological status to hepatitis B virus of Senegalese pregnant women by screening HBs antigen. Material and methods: The selection criteria of women were presence at the laboratory for biological exams of pregnancy follow-up. All volunteers for the study were screened for HBs antigen (HBs Ag). Investigation of chronic hepatitis B markers (HBe Ag, anti-HBe, viral quantification) was performed in HBs Ag positive participants. The concentration of anti-HBs antibodies was assessed in HBs Ag negative women. Results: One hundred and fifteen (115) pregnant women were included in the study from July to October 2014. The mean age was 29 ± 6 years, ranging from 16 to 47. The seroprevalence of HBs Ag was 12% and the majority of women (90%) were not vaccinated. Any of the 14 HBs Ag-positive subjects did not express serum HBe Ag, (marker of active viral replication) and all were positive for anti-HBe antibodies. Their viral load (HBV DNA) was undetectable and serum transaminases were normal. The anti-HBs antibodies titrated in HBs-Ag negative women serum revealed that only 46 had protective levels against HBV whilst 55 of them were unprotected.
文摘Cervical cancer is the leading cause of cancer deaths of women in developing world. Several studies demonstrated evidences of inflammatory cytokines implication in cancer progression including in initiation, promotion and invasion by affecting the immune surveillance. Our aim was to measure blood circulating pro- and anti-inflammatory cytokines levels, their profiles according to treatment issue and relation with prognostic factors in cervical cancer during chemotherapy. Blood samples were collected from a cohort of 35 cervical cancer women and 42 women healthy controls (HC) with no history of malignancy. For each CP, three samples were taken at three-week intervals. The first one (S1) was taken before initiation of the chemotherapy protocol. S2 and S3 were samples collected respectively at day 21 and day 42. Cytokines levels were evaluated by ELISA. Mean age of patients was 54.1 year (35 - 77 yo). In groups, no relation was observed between age and cytokines levels. Before chemotherapy, high levels of IL-6, IL-4 and IFN-γ were observed in CP compared to HC (p 0.001) and at the same period, IL-10 and TNF-α levels were significantly low in CP (p 0.05) and negatively correlated (r = —0.79;p = 0.017). In this CP group, IL-4 levels were positively correlated between S1 and S2 (r = 0.72;p = 0.002) and between S1 and S3 (r = 0.74;p = 0.019). Similar correlations were observed for TNF-α levels: S1/S2 (r = 0.54;p = 0.027), S2/S3 (r = 0.82;p = 0.009) and S1/S3 (r = 0.66;p = 0.036) with a significant increase of TNF-α in blood during treatment. Depending on chemotherapy’s efficacy, CP patients were separated into 1) non responders (NR), 2) partial responders (PR) and 3) good responders (GR). Compared to PR and GR groups, NR patients showed: a) higher serum levels of IL-6, IL-10 and IFN-γ during the follow-up and b) lower serum levels of IL-4 and TNF-α. In addition, serum levels of IL-4 were significantly higher in GR patients however TNF-α was the predominant cytokines in PR group. Our results highlight the variation of circulating cytokines such as IL-6, IL-10 and IFN-γ during cervical cancer chemotherapy. In addition, this study suggested that IL-4 and TNF-α might represent potential biomarkers candidate in cervical cancer. Applications in cancer management need further investigations particularly about the relevant prognostic indicator following chemotherapy and validation studies must provide more assurance for translation into clinical practice.
文摘We investigated relationship between galectin-3 (Gal-3) levels and T lymphocytes apoptosis and the activation rates in breast cancer during chemotherapy. We used plasma samples from 112 women classified into two groups: 70 women with breast cancer (BC) and submitted to neoadjuvant chemotherapy (3 cycles) and 42 healthy women used as controls. In the group of BC, blood samples were taken before each cycle of chemotherapy and Gal-3 levels was evaluated by ELISA sandwich. Flow cytometry was used to study T cells apoptosis and activation. Before treatment, median value of Gal-3 was 6.31 ng/ml (range 1.07 - 50.74) in BC and 0.84 ng/ml (range 0.00 - 4.82) in HC. Gal-3 levels were highest in plasmas from BC (p p p = 0.010). In addition, we found a dynamic relationship between gal-3 levels, tumor size and T lymphocytes apoptosis rates during treatment depending to the cure efficiency. We suggest gal-3 plasma concentrations could be used as predictive biomarker for chemotherapy efficiency in breast cancer patients.
基金supported by the African Higher Education Centers of Excellence Project(CEA-SAMEF)at UCAD,the Pasteur Institute in Dakar,the Pasteur Institute in Paris,the French Embassy in Senegal,INSERM,and Aix-Marseille University.MA and SN were supported by a Ph.D.fellowship from the French Ministry of Research and the Higher Education Commission(HEC)in Pakistan,respectivelysupport from the French Government under the France 2030 Investment Plan,as part of the Initiative d'Excellence d'Aix-Marseille Université-A∗MIDEX-Institute MarMaRa(No.AMX-19-IET-007).
文摘Malaria caused by the Plasmodium falciparum parasite is responsible for more than 240 million cases per year and killed 627,000 people in 2020,mostly African children.The malaria parasite is transmitted by mosquitos belonging to the genus Anopheles.After an asymptomatic liver stage,the parasite is released into the bloodstream to invade red blood cells(RBCs)and replicate asexually.This erythrocytic phase is associated with a variety of clinical manifestations,including mild and severe malaria.Cerebral malaria(CM)is one of the most severe forms,characterized by the sequestration of parasitized RBCs in the small capillaries of the brain and the local development of cytokine-mediated inflammation.Genetic variants in genes encoding proteins involved in red blood cell physiology are protective factors against severe malaria,as clearly demonstrated for the sickle cell variant of hemoglobin(HbS).
