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Ishida K, Osakunor DNM, Rossi M, Lamanna OK, Mbanefo EC, Cody JJ, Le L, Hsieh MH. RNA-seq gene expression profiling of the bladder in a mouse model of urogenital schistosomiasis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.29.601185. [PMID: 38979184 PMCID: PMC11230422 DOI: 10.1101/2024.06.29.601185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Background: Parasitic flatworms of the Schistosoma genus cause schistosomiasis, which affects over 230 million people. Schistosoma haematobium causes the urogenital form of schistosomiasis (UGS), which can lead to hematuria, fibrosis, and increased risk of secondary infections by bacteria or viruses. UGS is also linked to bladder cancer. To understand the bladder pathology during S. haematobium infection, our group previously developed a mouse model that involves the injection of S. haematobium eggs into the bladder wall. Using this model, we studied changes in epigenetics profile, as well as changes in gene and protein expression in the host bladder tissues. In the current study, we expand upon this work by examining the expression level of both host and parasite genes using RNA sequencing (RNA-seq) in the mouse bladder wall injection model of S. haematobium infection. Methods: We used a mouse model of S. haematobium infection in which parasite eggs or vehicle control were injected into the bladder walls of female BALB/c mice. RNA-seq was performed on the RNA isolated from the bladders four days after bladder wall injection. Results/Conclusions: RNA-seq analysis of egg- and vehicle control-injected bladders revealed the differential expression of 1025 mouse genes in the egg-injected bladders, including genes associated with cellular infiltration, immune cell chemotaxis, cytokine signaling, and inflammation We also observed the upregulation of immune checkpoint-related genes, which suggests that while the infection causes an inflammatory response, it also dampens the response to avoid excessive inflammation-related damage to the host. Identifying these changes in host signaling and immune responses improves our understanding of the infection and how it may contribute to the development of bladder cancer. Analysis of the differential gene expression of the parasite eggs between bladder-injected versus uninjected eggs revealed 119 S. haematobium genes associated with transcription, intracellular signaling, and metabolism. The analysis of the parasite genes also revealed fewer transcript reads compared to that found in the analysis of mouse genes, highlighting the challenges of studying parasite egg biology in the mouse model of S. haematobium infection. Author summary More than 230 million people worldwide are estimated to carry infection with parasites belonging to the Schistosoma genus, which cause morbidity associated with parasite egg deposition. Praziquantel, the drug of choice to treat the infection, does not prevent reinfection, and its decades-long history as the main treatment raises concerns for drug resistance. Of the schistosome species, Schistosoma haematobium causes urogenital disease and has a strong association with bladder cancer. The possibility for drug resistance and the gap in knowledge with respect to the mechanisms driving S. haematobium -related bladder cancer highlight the need to better understand the biology of the infection to aid in the development of new therapeutic strategies. In this study, we used a mouse model of S. haematobium infection that delivers parasite eggs directly to the host mouse bladder wall, and we examined the changes in the gene expression profile of the host and the parasite by RNA-sequencing. The results corroborated previous findings with respect to the host's inflammatory responses against the parasite eggs, as well as revealed alterations in other immune response genes that deepen our understanding of the mechanisms involved in urogenital schistosomiasis pathogenesis.
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Adewale B, Mafe MA, Mogaji HO, Balogun JB, Sulyman MA, Ajayi MB, Akande DO, Balogun EO. Urinary schistosomiasis and anemia among school-aged children from southwestern Nigeria. Pathog Glob Health 2024; 118:325-333. [PMID: 38419138 PMCID: PMC11234908 DOI: 10.1080/20477724.2024.2322800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024] Open
Abstract
Schistosomiasis and anemia, are one of the leading global public health problem among children between age 5 and 14 years in marginalized settings. In this study, we provide prevalence and intensity data for both conditions in three southwestern states of Nigeria, where such are lacking. Epidemiological assessment involving parasitological analysis of urine and blood samples was conducted among 1783 consenting school-aged children in Ondo, Osun, Ekiti States of Nigeria. Participants' age and sex data were obtained using field forms, and statistical analysis was performed in R software with a significance level of 95%. An overall prevalence of 26.8% and 29.5% was recorded for urinary schistosomiasis and anemia, respectively. Prevalence varied by location with (40.3% and 29.8%) in Ondo (34.4% and 37.5%) in Osun and (13.4% and 20.9%) in Ekiti for urinary schistosomiasis and anemia, respectively (p=0.00). Schistosoma infections were found among males (28.7%, p=0.05) and children between the age 9-11 years (30.0%, p=0.01). About 36% of children with anemia was also infected with schistosomiasis. Children who were positive for schistosomiasis (OR:1.51; 95% CI: 1.19, 1.93; p=0.001) and between the age category 15-16 years, (OR:1.86; 95% CI: 1.12, 3.09; p<0.05) were twice likely to become anemic. Our findings have shown that children infected with schistosomiasis are twice likely to become anemic than those without infection. It is important to complement ongoing MDA programmes targeted at schistosomiasis with nutrition intervention programs for example micronutrient supplementation for better impact and cost-effectiveness.
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Affiliation(s)
- Babatunde Adewale
- Public Health and Epidemiology Department, Nigerian Institute of Medical Research Nigeria, Lagos, Nigeria
| | - Margaret A. Mafe
- Public Health and Epidemiology Department, Nigerian Institute of Medical Research Nigeria, Lagos, Nigeria
| | - Hammed O. Mogaji
- Parasitology and Epidemiology Unit, Department of Animal and Environmental Biology, Federal University, Oye-Ekiti, Nigeria
| | - Joshua B. Balogun
- Department of Biological Sciences, Federal University Dutse, Dutse, Nigeria
| | - Medinat A. Sulyman
- Public Health and Epidemiology Department, Nigerian Institute of Medical Research Nigeria, Lagos, Nigeria
| | - Morakinyo B. Ajayi
- Public Health and Epidemiology Department, Nigerian Institute of Medical Research Nigeria, Lagos, Nigeria
| | - David O. Akande
- Public Health and Epidemiology Department, Nigerian Institute of Medical Research Nigeria, Lagos, Nigeria
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El-Shall MN, Aly I, Samen A, Salama WM, Baakdah F. Immunochromatography Lateral Flow Strip Enhancement Based on Passive Gold Nanoparticles Conjugation to Detect Schistosma haematobium Antigens in Human Serum. Acta Parasitol 2024; 69:1267-1274. [PMID: 38753102 PMCID: PMC11182813 DOI: 10.1007/s11686-024-00841-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 03/20/2024] [Indexed: 06/18/2024]
Abstract
PURPOSE This study aimed to develop and evaluate a lateral flow card for the detection of active Schistosoma haematobium infection. METHODS In order to prepare the immunochromatography lateral flow strip (ICLFS), antibodies purified from schistosomiasis were conjugated passively with gold nanoparticles using a potassium carbonate buffer. RESULTS The novel ICLFS was able to correctly identify 64 out of 67 samples of schistosomiasis, 6 out of 90 samples of other parasites, and 0 out of 27 control samples. Sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) were 95.5%, 93.3%, 90%, and 91.4% respectively. Comparatively, the sensitivity, specificity, NPV, and PPV of sandwich enzyme-linked immunosorbent assays (ELISA) conjugated with gold nanoparticles (AuNPs) were 91.1%, 88.8%, 85.9%, and 84.4% respectively. The increased sensitivity and specificity of ICLFS produced superior results to those of sandwich ELISA. CONCLUSION In conclusion, ICLFS is more beneficial and precise than sandwich ELISA for detection of S. haematobium infection at early stage.
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Affiliation(s)
- Mahmoud N El-Shall
- Department of Parasitology, Theodor Bilharz Research Institute, Giza, Egypt
| | - Ibrahim Aly
- Department of Parasitology, Theodor Bilharz Research Institute, Giza, Egypt
| | - Alaa Samen
- Zoology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Wesam M Salama
- Zoology Department, Faculty of Science, Tanta University, Tanta, Egypt.
| | - Fadi Baakdah
- Department of Medical Laboratory Science, Faculty of Applied Medical Sciences, King Abdulaziz University, 21589, Jeddah, Saudi Arabia
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, 21589, Jeddah, Saudi Arabia
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Ponzo E, Midiri A, Manno A, Pastorello M, Biondo C, Mancuso G. Insights into the epidemiology, pathogenesis, and differential diagnosis of schistosomiasis. Eur J Microbiol Immunol (Bp) 2024; 14:86-96. [PMID: 38498078 PMCID: PMC11097794 DOI: 10.1556/1886.2024.00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 02/29/2024] [Indexed: 03/19/2024] Open
Abstract
Schistosomiasis is a neglected tropical disease that is prevalent in low- and middle-income countries. There are five human pathogenic species, of which Schistosoma haematobium, Schistosoma mansoni and Schistosoma japonicum are the most prevalent worldwide and cause the greatest burden of disease in terms of mortality and morbidity. In addition, hybrid schistosomes have been identified through molecular analysis. Human infection occurs when cercariae, the larval form of the parasite, penetrate the skin of people while bathing in contaminated waters such as lakes and rivers. Schistosomiasis can cause both urogenital and intestinal symptoms. Urogenital symptoms include haematuria, bladder fibrosis, kidney damage, and an increased risk of bladder cancer. Intestinal symptoms may include abdominal pain, sometimes accompanied by diarrhoea and blood in the stool. Schistosomiasis affects more than 250 million people and causes approximately 70 million Disability-Adjusted Life Years (DALYs), mainly in Africa, South America, and Asia. To control infection, it is essential to establish sensitive and specific diagnostic tests for epidemiological surveillance and morbidity reduction. This review provides an overview of schistosomiasis, with a focus on available diagnostic tools for Schistosoma spp. Current molecular detection methods and progress in the development of new diagnostics for schistosomiasis infection are also discussed.
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Affiliation(s)
- Elena Ponzo
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
| | - Angelina Midiri
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
| | - Andrea Manno
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
| | - Martina Pastorello
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
| | - Carmelo Biondo
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
| | - Giuseppe Mancuso
- Department of Human Pathology, Laboratory of Parasitology, University of Messina, 98125Messina, Italy
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Keltner C, Causbie J, Haynes R, Mandia J, Imad H, Matsee W. Surveillance cystoscopy for atypical Schistosoma haematobium infection associated with recurrent UTIs. Travel Med Infect Dis 2024; 59:102702. [PMID: 38423232 DOI: 10.1016/j.tmaid.2024.102702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/02/2024]
Affiliation(s)
- Case Keltner
- Department of Public Health, Madigan Army Medical Center, Washington, USA.
| | | | - Robert Haynes
- Department of Public Health, Madigan Army Medical Center, Washington, USA
| | - Jeremy Mandia
- Department of Public Health, Madigan Army Medical Center, Washington, USA
| | - Hisham Imad
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Thai Travel Clinic, Hospital for Tropical Diseases, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wasin Matsee
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Thai Travel Clinic, Hospital for Tropical Diseases, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Aribodor OB, Azugo NO, Jacob EC, Ngenegbo UC, Onwusulu ND, Obika I, Obikwelu EM, Nebe OJ. Assessing urogenital schistosomiasis and female genital schistosomiasis (FGS) among adolescents in Anaocha, Anambra State, Nigeria: implications for ongoing control efforts. BMC Public Health 2024; 24:952. [PMID: 38566137 PMCID: PMC10988871 DOI: 10.1186/s12889-024-18378-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 03/18/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Urogenital schistosomiasis (UgS) remains a persistent health challenge among adolescents in Anambra State, Nigeria, despite ongoing control efforts. Mass praziquantel treatment programs, initiated in 2013, primarily target primary school-aged children (5-14 years old), leaving adolescents (10-19 years old) enrolled in secondary schools vulnerable to urogenital schistosomiaisis. Additionally, the extent of female genital schistosomiasis (FGS), a neglected gynaecological manifestation of UgS remains unclear. METHODOLOGY To address these gaps, a cross-sectional study was conducted in Anaocha Local Government Area from February to May 2023. Four hundred and seventy consenting adolescents aged 10-19 years were enrolled. Urinalysis including urine filtration was employed to confirm haematuria and detect urogenital schistosomiasis (UGS) among the participants. For females with heavy infections (≥ 50 eggs/10 ml urine), a gynaecologist performed colposcopy examinations, complemented by acetic acid and Lugol's iodine staining to assess for female genital schistosomiasis (FGS) lesions or other related reproductive health conditions. Socio-demographic data, including information on potential risk factors, were systematically collected using the Kobo ToolBox software, following gender-sensitive data collection guidelines. Data were analysed using SPSS version 25, incorporating descriptive statistics, multinomial logistic regression, odds ratios, and significance testing. RESULTS Among the 470 adolescents (52.8% females, 47.2% males) examined, an overall UgS prevalence of 14.5% was observed, with an average of 5.25 eggs per 10 ml of urine. Females had a slightly higher prevalence (16.1%), and 7.5% had heavy infections. Although gender differences in infection rates were not statistically significant, males had slightly higher odds of infection (OR: 1.332; 95% CI: 0.791-2.244; p-value: 0.280). Adolescents aged 10-14 had the highest prevalence, with significantly increased odds of infection (OR: 1.720; 95% CI: 1.012-2.923; p-value: 0.045). Colposcopy examinations of females with heavy infections revealed FGS lesions and co-infections with Trichomonas vaginalis. Haematuria, though prevalent (24.6%), was not the sole indicator, as those without it faced significantly higher odds of infection (OR: 2.924; 95% CI: 1.731-4.941; p-value: 0.000). Dysuria and genital itching/burning sensation were other UgS and FGS associated symptoms. Direct water contact was associated with higher infection odds (OR: 2.601; 95% CI: 1.007-6.716; p-value: 0.048). Various risk factors were associated with UgS. CONCLUSION The study highlights the need for a comprehensive Urogenital Schistosomiasis (UGS) control strategy that includes secondary school adolescents, emphasizes risk factor management, promotes safe water practices, and raises awareness about UGS and Female Genital Schistosomiasis (FGS) among adolescents, thus improving control efforts and mitigating this health challenge in the region.
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Affiliation(s)
- Ogechukwu B Aribodor
- Department of Zoology, Nnamdi Azikiwe University, Awka, Nigeria.
- Social Innovation in Health Initiative (SIHI) Hub, Nnamdi Azikiwe University, Awka, Nigeria.
| | - Nwadiuto O Azugo
- Department of Zoology, Nnamdi Azikiwe University, Awka, Nigeria
- Social Innovation in Health Initiative (SIHI) Hub, Nnamdi Azikiwe University, Awka, Nigeria
| | - Eunice C Jacob
- Department of Zoology, Nnamdi Azikiwe University, Awka, Nigeria
- Social Innovation in Health Initiative (SIHI) Hub, Nnamdi Azikiwe University, Awka, Nigeria
| | - Uche C Ngenegbo
- Department of Parasitology and Entomology, Nnamdi Azikiwe University, Awka, Nigeria
| | - Nnaemeka D Onwusulu
- Department of Obstetrics and Gynaecology, Nnamdi Azikiwe University, Awka, Nigeria
| | - Ifeanyi Obika
- Department of Zoology, Nnamdi Azikiwe University, Awka, Nigeria
| | - Emmanuel M Obikwelu
- Neglected Tropical Diseases Unit, Anambra State Ministry of Health, Awka, Nigeria
| | - Obiageli J Nebe
- Neglected Tropical Diseases Division, Federal Ministry of Health, Abuja, Nigeria
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Russo AE, Memon A, Ahmed S. Bladder Cancer and the Urinary Microbiome-New Insights and Future Directions: A Review. Clin Genitourin Cancer 2024; 22:434-444. [PMID: 38220540 DOI: 10.1016/j.clgc.2023.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/26/2023] [Accepted: 12/28/2023] [Indexed: 01/16/2024]
Abstract
The presence of a microbiome in the urinary system has been established through recent advancements in technology and investigation of microbial communities in the human body. The study of the taxonomic and genomic ecology of microbial communities has been greatly improved by the use of metagenomics. The research in this area has expanded our understanding of microbial ecosystems and shows that the urinary tract contains over 100 species from over 50 genera, with Lactobacillus, Gardnerella, and Streptococcus being the most common. Previous studies have suggested that the microbiota in the urinary tract may play a role in carcinogenesis by causing chronic inflammation and genotoxicity, but more research is needed to reach a definite conclusion. This is a narrative review. We conducted a search for relevant publications by using the databases Medline/PubMed and Google Scholar. The search was based on keywords such as "urinary microbiome," "bladder cancer," "carcinogenesis," "urothelial carcinoma," and "next-generation sequencing." The retrieved publications were then reviewed to study the contribution of the urinary microbiome in the development of bladder cancer. The results have been categorized into four sections to enhance understanding of the urinary microbiome and to highlight its role in the emergence of bladder cancer through alterations in the immune response that involve T-cells and antibodies. The immune system and microbiome play crucial roles in maintaining health and preventing disease. Manipulating the immune system is a key aspect of various cancer treatments, and certain gut bacteria have been linked to positive responses to immunotherapies. However, the impact of these treatments on the urinary microbiome, and how diet and lifestyle affect it, are not well understood. Research in this area could have significant implications for improving bladder cancer treatment and patient outcomes.
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Affiliation(s)
- Angela E Russo
- Larner College of Medicine, University of Vermont, Burlington, VT.
| | - Areeba Memon
- Medical College, Aga Khan University, Karachi, Sindh, Pakistan
| | - Shahid Ahmed
- Department of Hematology and Oncology, University of Vermont, Burlington, VT
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Jain S, Rana M. From the discovery of helminths to the discovery of their carcinogenic potential. Parasitol Res 2023; 123:47. [PMID: 38095695 DOI: 10.1007/s00436-023-08022-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023]
Abstract
Cancer involves a major aberration in the normal behaviour of cells, making them divide continuously, which interferes with the normal physiology of the body. The link between helminths and their cancer-inducing potential has been proposed in the last century. The exact pathway is still not clear but chronic inflammation in response to the deposited eggs, immune response against soluble egg antigens, and co-infection with a third party (a bacteria, a virus, or infection leading to a change in microbiome) seems to be the reasons for cancer induction. This review looks into the historical outlook on helminths along with their epidemiology, morphology, and life cycle. It then focuses on providing correlations between helminth infection and molecular mechanism of carcinogenesis by elaborating upon epidemiological, clinical, and surgical studies. While the cancer-inducing potential has been convincingly established only for a few helminths and studies point out towards possible cancer-inducing ability of the rest of the helminths elucidated in this work, however, more insights into the immunobiology of helminths as well as infected patients are required to conclusively comment upon this ability of the latter.
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Affiliation(s)
- Sidhant Jain
- Institute for Globally Distributed Open Research and Education (IGDORE), Rewari, Haryana, India.
| | - Meenakshi Rana
- Dyal Singh College, University of Delhi, Lodhi Road, Pragati Vihaar, New Delhi, India
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Peng Z, Zhuang J, Shen B. The role of microbiota in tumorigenesis, progression and treatment of bladder cancer. MICROBIOME RESEARCH REPORTS 2023; 3:5. [PMID: 38455086 PMCID: PMC10917617 DOI: 10.20517/mrr.2023.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/09/2023] [Accepted: 11/13/2023] [Indexed: 03/09/2024]
Abstract
For decades, the urinary system was regarded as a sterile environment due to the absence of any bacterial growth in clinical standard urine cultures from healthy individuals. However, a diverse array of microbes colonizes the urinary system in small quantities, exhibiting a variable compositional signature influenced by differences in sex, age, and pathological state. Increasing pieces of evidence suggest microbiota exists in tumor tissue and plays a crucial role in tumor microenvironment based on research in multiple cancer models. Current studies about microbiota and bladder cancer have preliminarily characterized the bladder cancer-related microbiota, but how the microbiota influences the biological behavior of bladder cancer remains unclarified. This review summarizes the characteristics of microbiota in bladder cancer, aims to propose possible mechanisms that microbiota acts in tumorigenesis and progression of bladder cancer based on advances in gut microbiota, and discusses the potential clinical application of microbiota in bladder cancer.
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Affiliation(s)
| | | | - Bing Shen
- Correspondence to: Prof. Bing Shen, Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, NO. 85 Wu Jin Road, Hongkou District, Shanghai 200080, China. E-mail:
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Borlase A, Prada JM, Crellen T. Modelling morbidity for neglected tropical diseases: the long and winding road from cumulative exposure to long-term pathology. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220279. [PMID: 37598702 PMCID: PMC10440174 DOI: 10.1098/rstb.2022.0279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 07/13/2023] [Indexed: 08/22/2023] Open
Abstract
Reducing the morbidities caused by neglected tropical diseases (NTDs) is a central aim of ongoing disease control programmes. The broad spectrum of pathogens under the umbrella of NTDs lead to a range of negative health outcomes, from malnutrition and anaemia to organ failure, blindness and carcinogenesis. For some NTDs, the most severe clinical manifestations develop over many years of chronic or repeated infection. For these diseases, the association between infection and risk of long-term pathology is generally complex, and the impact of multiple interacting factors, such as age, co-morbidities and host immune response, is often poorly quantified. Mathematical modelling has been used for many years to gain insights into the complex processes underlying the transmission dynamics of infectious diseases; however, long-term morbidities associated with chronic or cumulative exposure are generally not incorporated into dynamic models for NTDs. Here we consider the complexities and challenges for determining the relationship between cumulative pathogen exposure and morbidity at the individual and population levels, drawing on case studies for trachoma, schistosomiasis and foodborne trematodiasis. We explore potential frameworks for explicitly incorporating long-term morbidity into NTD transmission models, and consider the insights such frameworks may bring in terms of policy-relevant projections for the elimination era. This article is part of the theme issue 'Challenges and opportunities in the fight against neglected tropical diseases: a decade from the London Declaration on NTDs'.
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Affiliation(s)
- Anna Borlase
- Department of Biology, University of Oxford, Oxford OX1 3SZ, UK
- Big Data Institute, Li Ka Shing Centre for Health Information and Discovery, University of Oxford, Oxford OX3 7LF, UK
| | - Joaquin M. Prada
- Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Thomas Crellen
- Big Data Institute, Li Ka Shing Centre for Health Information and Discovery, University of Oxford, Oxford OX3 7LF, UK
- School of Biodiversity, One Health & Veterinary Medicine, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK
- Wellcome Centre for Integrative Parasitology, Sir Graeme Davies Building, University of Glasgow, Glasgow G12 8TA, UK
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Yang Y, Wang XY, Duan C, Wang ZJ, Sheng HY, Xu XL, Wang WJ, Yang JH. Clinicopathological characteristics and its association with digestive system tumors of 1111 patients with Schistosomiasis japonica. Sci Rep 2023; 13:15115. [PMID: 37704736 PMCID: PMC10500003 DOI: 10.1038/s41598-023-42456-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 09/11/2023] [Indexed: 09/15/2023] Open
Abstract
Schistosomiasis japonicum can cause different degrees of organ damage and complex human immune pathological reactions, which often invade the intestine and liver. The purpose of this study was to explore the pathological types and pathological changes of Schistosomiasis and their correlation with some digestive system tumors. Hematoxylin eosin staining was performed on the diseased tissues of 1111 Schistosomiasis cases. We counted the deposition sites of Schistosoma eggs, analyzed the pathological characteristics, and compared the clinicopathological characteristics of Schistosomiasis associated digestive system tumors and non-Schistosomiasis digestive system tumors. We found that Schistosoma japonicum can cause multi organ and multi system damage, with 469 cases of inflammation, 47 cases of adenoma, and 519 cases of adenocarcinoma. Other types include cysts, stromal tumors, malignant lymphomas, and neuroendocrine tumors. Schistosomiasis associated tumors, including gastric cancer, liver cancer, colon cancer and rectal cancer, were compared with non-Schistosomiasis tumors. There were significant differences in age, gender and tumor differentiation between the two groups. Our study shows Schistosomiasis is a systemic disease, causing multiple organ and system damage in the human body. Its clinicopathological types are diverse, and there may be a pathological change process of "Inflammation-adenoma-carcinoma". Schistosomiasis associated digestive system tumors differ from non-Schistosomiasis tumors in some clinicopathological features.
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Affiliation(s)
- Yang Yang
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
- Class1 Grade 2019, Department of Stomatology, Bengbu Medical College, Bengbu, Anhui, People's Republic of China
| | - Xiao-Yi Wang
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Chun Duan
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Zi-Jian Wang
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Hao-Yu Sheng
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Xiu-Liang Xu
- Department of Infectious Diseases, The People's Hospital of Chizhou, Chizhou, Anhui, People's Republic of China
| | - Wen-Jie Wang
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Jiang-Hua Yang
- Department of Infectious Diseases, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, People's Republic of China.
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Fonti N, Parisi F, Mancianti F, Freer G, Poli A. Cancerogenic parasites in veterinary medicine: a narrative literature review. Infect Agent Cancer 2023; 18:45. [PMID: 37496079 PMCID: PMC10373346 DOI: 10.1186/s13027-023-00522-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/17/2023] [Indexed: 07/28/2023] Open
Abstract
Parasite infection is one of the many environmental factors that can significantly contribute to carcinogenesis and is already known to be associated with a variety of malignancies in both human and veterinary medicine. However, the actual number of cancerogenic parasites and their relationship to tumor development is far from being fully understood, especially in veterinary medicine. Thus, the aim of this review is to investigate parasite-related cancers in domestic and wild animals and their burden in veterinary oncology. Spontaneous neoplasia with ascertained or putative parasite etiology in domestic and wild animals will be reviewed, and the multifarious mechanisms of protozoan and metazoan cancer induction will be discussed.
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Affiliation(s)
- Niccolò Fonti
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy.
| | - Francesca Parisi
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
| | - Francesca Mancianti
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
| | - Giulia Freer
- Dipartimento di Ricerca Traslazionale e delle Nuove Tecnologie in Medicina e Chirurgia, Università di Pisa, Via Savi, 10, 56126, Pisa, Italy
| | - Alessandro Poli
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
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13
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Idigoras Viedma P, Gomariz Díaz M, Manzanal Pérez A, Alkorta Gurrutxaga M. [Sub-Saharan migrants, sterile pyuria and schistosomiasis]. Semergen 2023; 49:101952. [PMID: 37336035 DOI: 10.1016/j.semerg.2023.101952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/06/2023] [Accepted: 02/17/2023] [Indexed: 06/21/2023]
Affiliation(s)
- P Idigoras Viedma
- Servicio de Microbiología, Hospital Universitario Donostia, Osakidetza, San Sebastián, Guipúzcoa, España.
| | - M Gomariz Díaz
- Servicio de Microbiología, Hospital Universitario Donostia, Osakidetza, San Sebastián, Guipúzcoa, España
| | - A Manzanal Pérez
- Servicio de Microbiología, Hospital Universitario Donostia, Osakidetza, San Sebastián, Guipúzcoa, España
| | - M Alkorta Gurrutxaga
- Servicio de Microbiología, Hospital Universitario Donostia, Osakidetza, San Sebastián, Guipúzcoa, España
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14
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Cherkaoui D, Mesquita SG, Huang D, Lugli EB, Webster BL, McKendry RA. CRISPR-assisted test for Schistosoma haematobium. Sci Rep 2023; 13:4990. [PMID: 36973334 PMCID: PMC10042105 DOI: 10.1038/s41598-023-31238-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/08/2023] [Indexed: 03/29/2023] Open
Abstract
Schistosomiasis is a major neglected tropical disease targeted for elimination as a public health issue by 2030, however there is an urgent need for more sensitive and specific diagnostic tests suitable to resource-limited settings. Here we developed CATSH, a CRISPR-assisted diagnostic test for Schistosoma haematobium, utilising recombinase polymerase amplification, Cas12a-targeted cleavage and portable real-time fluorescence detection. CATSH showed high analytical sensitivity, consistent detection of a single parasitic egg and specificity for urogenital Schistosoma species. Thanks to a novel CRISPR-compatible sample preparation developed using simulated urine samples containing parasitic eggs, CATSH had a sample-to-result within 2 h. The components of CATSH can be lyophilised, reducing cold chain dependence and widening access to lower and middle-income countries. This work presents a new application of CRISPR diagnostics for highly sensitive and specific detection of parasitic pathogens in remote areas and could have a significant impact on the elimination of neglected tropical diseases.
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Affiliation(s)
- Dounia Cherkaoui
- London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK.
- Division of Medicine, University College London, London, WC1E 6BT, UK.
| | - Silvia G Mesquita
- Wolfson Wellcome Biomedical Laboratories, Department of Science, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
- René Rachou Institute, Oswaldo Cruz Foundation, Belo Horizonte, Minas Gerais, Brazil
- London Centre for Neglected Tropical Disease Research (LCNTDR), London, W21 PG, UK
| | - Da Huang
- London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK
| | - Elena B Lugli
- Wolfson Wellcome Biomedical Laboratories, Department of Science, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
- London Centre for Neglected Tropical Disease Research (LCNTDR), London, W21 PG, UK
| | - Bonnie L Webster
- Wolfson Wellcome Biomedical Laboratories, Department of Science, Natural History Museum, Cromwell Road, London, SW7 5BD, UK.
- London Centre for Neglected Tropical Disease Research (LCNTDR), London, W21 PG, UK.
| | - Rachel A McKendry
- London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK.
- Division of Medicine, University College London, London, WC1E 6BT, UK.
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15
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Status Quo and Future Perspectives of Molecular and Genomic Studies on the Genus Biomphalaria-The Intermediate Snail Host of Schistosoma mansoni. Int J Mol Sci 2023; 24:ijms24054895. [PMID: 36902324 PMCID: PMC10003693 DOI: 10.3390/ijms24054895] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 03/06/2023] Open
Abstract
Schistosomiasis, or also generally known as bilharzia or snail fever, is a parasitic disease that is caused by trematode flatworms of the genus Schistosoma. It is considered by the World Health Organisation as the second most prevalent parasitic disease after malaria and affects more than 230 million people in over 70 countries. People are infected via a variety of activities ranging from agricultural, domestic, occupational to recreational activities, where the freshwater snails Biomphalaria release Schistosoma cercariae larvae that penetrate the skin of humans when exposed in water. Understanding the biology of the intermediate host snail Biomphalaria is thus important to reveal the potential spread of schistosomiasis. In this article, we present an overview of the latest molecular studies focused on the snail Biomphalaria, including its ecology, evolution, and immune response; and propose using genomics as a foundation to further understand and control this disease vector and thus the transmission of schistosomiasis.
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16
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Domingues C, Cabral C, Jarak I, Veiga F, Dourado M, Figueiras A. The Debate between the Human Microbiota and Immune System in Treating Aerodigestive and Digestive Tract Cancers: A Review. Vaccines (Basel) 2023; 11:vaccines11030492. [PMID: 36992076 DOI: 10.3390/vaccines11030492] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/23/2023] Open
Abstract
The human microbiota comprises a group of microorganisms co-existing in the human body. Unbalanced microbiota homeostasis may impact metabolic and immune system regulation, shrinking the edge between health and disease. Recently, the microbiota has been considered a prominent extrinsic/intrinsic element of cancer development and a promising milestone in the modulation of conventional cancer treatments. Particularly, the oral cavity represents a yin-and-yang target site for microorganisms that can promote human health or contribute to oral cancer development, such as Fusobacterium nucleatum. Moreover, Helicobacter pylori has also been implicated in esophageal and stomach cancers, and decreased butyrate-producing bacteria, such as Lachnospiraceae spp. and Ruminococcaceae, have demonstrated a protective role in the development of colorectal cancer. Interestingly, prebiotics, e.g., polyphenols, probiotics (Faecalibacterium, Bifidobacterium, Lactobacillus, and Burkholderia), postbiotics (inosine, butyrate, and propionate), and innovative nanomedicines can modulate antitumor immunity, circumventing resistance to conventional treatments and could complement existing therapies. Therefore, this manuscript delivers a holistic perspective on the interaction between human microbiota and cancer development and treatment, particularly in aerodigestive and digestive cancers, focusing on applying prebiotics, probiotics, and nanomedicines to overcome some challenges in treating cancer.
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Affiliation(s)
- Cátia Domingues
- Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- LAQV-REQUIMTE, Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Cristiana Cabral
- Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Ivana Jarak
- Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Francisco Veiga
- Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- LAQV-REQUIMTE, Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Marília Dourado
- Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Health Studies and Research of the University of Coimbra (CEISUC), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Studies and Development of Continuous and Palliative Care (CEDCCP), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Ana Figueiras
- Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- LAQV-REQUIMTE, Laboratory of Drug Development and Technologies, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
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17
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Ido F, Ouedraogo A, Savadogo I, Hafing T, Ouattara S. Epididymal bilharzia simulating a testicular tumor: A case report. IDCases 2023; 32:e01770. [PMID: 37131488 PMCID: PMC10149191 DOI: 10.1016/j.idcr.2023.e01770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 05/04/2023] Open
Abstract
Bilharzia or schistosomiasis is a parasitic disease due to infestation by a hematophagous trematode of the genus Schistosoma. It is the second most frequent parasitic endemic in the world after malaria. The most frequent tissue infections are intestinal and genitourinary. Testicular localizations of schistosoma are very rare. When lesions become chronic, they present as non-specific masses, bilharziomas, posing enormous problems of differential diagnosis with other benign and malignant pathologies, which impacts management. We report a case of epididymal schistosomiasis in a 37 years old patient simulating a malignant tumor. This case allowed us to review the diagnostic difficulties of this rare localization and the challenges of management.
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Affiliation(s)
- F.A.H.A. Ido
- Department of Anatomy and Pathological Cytology CHU, Tengandogo, Ouagadougou, Burkina Faso
- Correspondence to: 11 BP 104 CMS Ouagadougou 01, Burkina Faso.
| | - A.S. Ouedraogo
- Department of Anatomy and Pathological Cytology CHU, Bogododgo, Ouagadougou, Burkina Faso
| | - I. Savadogo
- Department of Anatomy and Pathological Cytology CHU-R of Ouahigouya, Burkina Faso
| | - T. Hafing
- Department of Urology CHU, Tengandogo, Ouagadougou, Burkina Faso
| | - S. Ouattara
- Department of Anatomy and Pathological Cytology CHU, Tengandogo, Ouagadougou, Burkina Faso
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18
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Efared B, Bako ABA, Idrissa B, Alhousseini D, Boureima HS, Sodé HC, Nouhou H. Urinary bladder Schistosoma haematobium-related squamous cell carcinoma: a report of two fatal cases and literature review. Trop Dis Travel Med Vaccines 2022; 8:3. [PMID: 35164874 PMCID: PMC8845255 DOI: 10.1186/s40794-022-00161-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 01/02/2022] [Indexed: 11/30/2022] Open
Abstract
Background Schistosomiasis is still a public health issue in certain areas of developing countries (especially in sub-saharan Africa). Schistosoma haematobium is a proven carcinogenic agent that causes mainly bladder squamous cell carcinoma. This type of cancer has characteristic epidemiological, clinical and histopathological features with poor prognosis as compared to other urinary bladder cancers not associated with this parasite. Cases presentation We report two fatal cases of advanced-stage bladder squamous cell carcinoma associated with Schistosoma haematobium in a sub-saharan developing African country (Niger), illustrating the devastating complications of this tropical neglected disease. The two cases were a 38-year-old woman and a 37-year-old male. They presented with chronic pelvic pain and hematuria. The clinical and radiological work-up revealed invasive urivary bladder tumor extended to the pelvis, that was histopathologically proven to be an invasive squamous cell carcinoma associated with Schistosoma haematobium. The two patients died shortly after the diagnosis before chemotherapy prescription. Conclusion Schistosoma-associated bladder squamous cell carcinoma has characteristic features with dismal prognosis. Eradication of this parasite remains the only efficient way to prevent the devastating consequences of this particular cancer.
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19
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Wen Y, Zhu Y, Zhang C, Yang X, Gao Y, Li M, Yang H, Liu T, Tang H. Chronic inflammation, cancer development and immunotherapy. Front Pharmacol 2022; 13:1040163. [PMID: 36313280 PMCID: PMC9614255 DOI: 10.3389/fphar.2022.1040163] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/03/2022] [Indexed: 12/03/2022] Open
Abstract
Chronic inflammation plays a pivotal role in cancer development. Cancer cells interact with adjacent cellular components (pro-inflammatory cells, intrinsic immune cells, stromal cells, etc.) and non-cellular components to form the inflammatory tumor microenvironment (TME). Interleukin 6 (IL-6), macrophage migration inhibitory factor (MIF), immune checkpoint factors and other pro-inflammatory cytokines produced by intrinsic immune cells in TME are the main mediators of intercellular communication in TME, which link chronic inflammation to cancer by stimulating different oncogenic signaling pathways and improving immune escape to promote cancer development. In parallel, the ability of monocytes, T regulatory cells (Tregs) and B regulatory cells (Bregs) to perform homeostatic tolerogenic functions is hijacked by cancer cells, leading to local or systemic immunosuppression. Standard treatments for advanced malignancies such as chemotherapy and radiotherapy have improved in the last decades. However, clinical outcomes of certain malignant cancers are not satisfactory due to drug resistance and side effects. The clinical application of immune checkpoint therapy (ICT) has brought hope to cancer treatment, although therapeutic efficacy are still limited due to the immunosuppressive microenvironment. Emerging evidences reveal that ideal therapies including clearance of tumor cells, disruption of tumor-induced immunosuppression by targeting suppressive TME as well as reactivation of anti-tumor T cells by ICT. Here, we review the impacts of the major pro-inflammatory cells, mediators and their downstream signaling molecules in TME on cancer development. We also discuss the application of targeting important components in the TME in the clinical management of cancer.
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Affiliation(s)
- Yalei Wen
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Yingjie Zhu
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Caishi Zhang
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Xiao Yang
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Yuchen Gao
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Mei Li
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China
| | - Hongyan Yang
- Department of Central Laboratory, The First Affiliated Hospital of Jinan University, Guangzhou, China,*Correspondence: Hongyan Yang, ; Tongzheng Liu, ; Hui Tang,
| | - Tongzheng Liu
- College of Pharmacy/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, China,*Correspondence: Hongyan Yang, ; Tongzheng Liu, ; Hui Tang,
| | - Hui Tang
- Department of Central Laboratory, The First Affiliated Hospital of Jinan University, Guangzhou, China,Department of Clinical Laboratory, The Fifth Affiliated Hospital of Jinan University (Heyuan Shenhe People’s Hospital), Heyuan, China,*Correspondence: Hongyan Yang, ; Tongzheng Liu, ; Hui Tang,
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20
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Chienwichai P, Nogrado K, Tipthara P, Tarning J, Limpanont Y, Chusongsang P, Chusongsang Y, Tanasarnprasert K, Adisakwattana P, Reamtong O. Untargeted serum metabolomic profiling for early detection of Schistosoma mekongi infection in mouse model. Front Cell Infect Microbiol 2022; 12:910177. [PMID: 36061860 PMCID: PMC9433908 DOI: 10.3389/fcimb.2022.910177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 07/29/2022] [Indexed: 11/13/2022] Open
Abstract
Mekong schistosomiasis is a parasitic disease caused by blood flukes in the Lao People’s Democratic Republic and in Cambodia. The standard method for diagnosis of schistosomiasis is detection of parasite eggs from patient samples. However, this method is not sufficient to detect asymptomatic patients, low egg numbers, or early infection. Therefore, diagnostic methods with higher sensitivity at the early stage of the disease are needed to fill this gap. The aim of this study was to identify potential biomarkers of early schistosomiasis using an untargeted metabolomics approach. Serum of uninfected and S. mekongi-infected mice was collected at 2, 4, and 8 weeks post-infection. Samples were extracted for metabolites and analyzed with a liquid chromatography-tandem mass spectrometer. Metabolites were annotated with the MS-DIAL platform and analyzed with Metaboanalyst bioinformatic tools. Multivariate analysis distinguished between metabolites from the different experimental conditions. Biomarker screening was performed using three methods: correlation coefficient analysis; feature important detection with a random forest algorithm; and receiver operating characteristic (ROC) curve analysis. Three compounds were identified as potential biomarkers at the early stage of the disease: heptadecanoyl ethanolamide; picrotin; and theophylline. The levels of these three compounds changed significantly during early-stage infection, and therefore these molecules may be promising schistosomiasis markers. These findings may help to improve early diagnosis of schistosomiasis, thus reducing the burden on patients and limiting spread of the disease in endemic areas.
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Affiliation(s)
- Peerut Chienwichai
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand
| | - Kathyleen Nogrado
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Phornpimon Tipthara
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Joel Tarning
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, United Kingdom
| | - Yanin Limpanont
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Phiraphol Chusongsang
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Yupa Chusongsang
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Kanthi Tanasarnprasert
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Poom Adisakwattana
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Onrapak Reamtong
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- *Correspondence: Onrapak Reamtong,
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21
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Leija-Montoya AG, González-Ramírez J, Martínez-Coronilla G, Mejía-León ME, Isiordia-Espinoza M, Sánchez-Muñoz F, Chávez-Cortez EG, Pitones-Rubio V, Serafín-Higuera N. Roles of microRNAs and Long Non-Coding RNAs Encoded by Parasitic Helminths in Human Carcinogenesis. Int J Mol Sci 2022; 23:ijms23158173. [PMID: 35897749 PMCID: PMC9331937 DOI: 10.3390/ijms23158173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/15/2022] [Accepted: 07/21/2022] [Indexed: 12/14/2022] Open
Abstract
Infectious agents such as viruses, bacteria, and parasites can lead to cancer development. Infection with the helminthic parasite Schistosoma haematobium can cause cancer of the urinary bladder in humans, and infection with the parasites Clonorchis sinensis and Opisthorchis viverrini can promote cholangiocarcinoma. These three pathogens have been categorized as “group 1: carcinogenic to humans” by the International Agency for Research on Cancer (IARC). Additionally, the parasite Schistosoma japonicum has been associated with liver and colorectal cancer and classified as “group 2B: possibly carcinogenic to humans”. These parasites express regulatory non-coding RNAs as microRNAs (miRNAs) and long non-coding RNAs (lncRNAs), which modulate genic expression in different biological processes. In this review, we discuss the potential roles of miRNAS and lncRNAs encoded by helminthic parasites that are classified by the IARC as carcinogenic and possibly carcinogenic to humans. The miRNAs of these parasites may be involved in carcinogenesis by modulating the biological functions of the pathogen and the host and by altering microenvironments prone to tumor growth. miRNAs were identified in different host fluids. Additionally, some miRNAs showed direct antitumoral effects. Together, these miRNAs show potential for use in future therapeutic and diagnostic applications. LncRNAs have been less studied in these parasites, and their biological effects in the parasite–host interaction are largely unknown.
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Affiliation(s)
- Ana Gabriela Leija-Montoya
- Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, Centro Cívico, Mexicali 21000, BC, Mexico; (A.G.L.-M.); (G.M.-C.); (M.E.M.-L.)
| | - Javier González-Ramírez
- Facultad de Enfermería, Universidad Autónoma de Baja California, Av. Álvaro Obregón y Calle “G” S/N, Col. Nueva, Mexicali 21100, BC, Mexico;
| | - Gustavo Martínez-Coronilla
- Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, Centro Cívico, Mexicali 21000, BC, Mexico; (A.G.L.-M.); (G.M.-C.); (M.E.M.-L.)
| | - María Esther Mejía-León
- Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, Centro Cívico, Mexicali 21000, BC, Mexico; (A.G.L.-M.); (G.M.-C.); (M.E.M.-L.)
| | - Mario Isiordia-Espinoza
- Instituto de Investigación en Ciencias Médicas, Departamento de Clínicas, División de Ciencias Biomédicas, Centro Universitario de Los Altos, Universidad de Guadalajara, Av. Rafael Casillas Aceves 1200, Tepatitlán de Morelos 47600, JAL, Mexico;
| | - Fausto Sánchez-Muñoz
- Departamento de Inmunología, Instituto Nacional de Cardiología, Juan Badiano No. 1, Col. Sección XVI, Tlapan 140080, DF, Mexico;
| | - Elda Georgina Chávez-Cortez
- Centro de Ciencias de la Salud, Facultad de Odontología, Universidad Autónoma de Baja California, Zotoluca s/n, Fracc. Calafia, Mexicali 21040, BC, Mexico; (E.G.C.-C.); (V.P.-R.)
| | - Viviana Pitones-Rubio
- Centro de Ciencias de la Salud, Facultad de Odontología, Universidad Autónoma de Baja California, Zotoluca s/n, Fracc. Calafia, Mexicali 21040, BC, Mexico; (E.G.C.-C.); (V.P.-R.)
| | - Nicolas Serafín-Higuera
- Centro de Ciencias de la Salud, Facultad de Odontología, Universidad Autónoma de Baja California, Zotoluca s/n, Fracc. Calafia, Mexicali 21040, BC, Mexico; (E.G.C.-C.); (V.P.-R.)
- Correspondence:
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22
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Ogongo P, Nyakundi RK, Chege GK, Ochola L. The Road to Elimination: Current State of Schistosomiasis Research and Progress Towards the End Game. Front Immunol 2022; 13:846108. [PMID: 35592327 PMCID: PMC9112563 DOI: 10.3389/fimmu.2022.846108] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/21/2022] [Indexed: 12/14/2022] Open
Abstract
The new WHO Roadmap for Neglected Tropical Diseases targets the global elimination of schistosomiasis as a public health problem. To date, control strategies have focused on effective diagnostics, mass drug administration, complementary and integrative public health interventions. Non-mammalian intermediate hosts and other vertebrates promote transmission of schistosomiasis and have been utilized as experimental model systems. Experimental animal models that recapitulate schistosomiasis immunology, disease progression, and pathology observed in humans are important in testing and validation of control interventions. We discuss the pivotal value of these models in contributing to elimination of schistosomiasis. Treatment of schistosomiasis relies heavily on mass drug administration of praziquantel whose efficacy is comprised due to re-infections and experimental systems have revealed the inability to kill juvenile schistosomes. In terms of diagnosis, nonhuman primate models have demonstrated the low sensitivity of the gold standard Kato Katz smear technique. Antibody assays are valuable tools for evaluating efficacy of candidate vaccines, and sera from graded infection experiments are useful for evaluating diagnostic sensitivity of different targets. Lastly, the presence of Schistosomes can compromise the efficacy of vaccines to other infectious diseases and its elimination will benefit control programs of the other diseases. As the focus moves towards schistosomiasis elimination, it will be critical to integrate treatment, diagnostics, novel research tools such as sequencing, improved understanding of disease pathogenesis and utilization of experimental models to assist with evaluating performance of new approaches.
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Affiliation(s)
- Paul Ogongo
- Division of Experimental Medicine, Department of Medicine, University of California, San Francisco, San Francisco, CA, United States.,Department of Tropical and Infectious Diseases, Institute of Primate Research, Nairobi, Kenya
| | - Ruth K Nyakundi
- Department of Tropical and Infectious Diseases, Institute of Primate Research, Nairobi, Kenya
| | - Gerald K Chege
- Primate Unit & Delft Animal Centre, South African Medical Research Council, Cape Town, South Africa.,Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Lucy Ochola
- Department of Tropical and Infectious Diseases, Institute of Primate Research, Nairobi, Kenya.,Department of Environmental Health, School of Behavioural and Lifestyle Sciences, Faculty of Health Sciences, Nelson Mandela University, Gqeberha, South Africa
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23
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He X, Pan W. Host–parasite interactions mediated by cross-species microRNAs. Trends Parasitol 2022; 38:478-488. [DOI: 10.1016/j.pt.2022.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/21/2022] [Accepted: 02/21/2022] [Indexed: 10/18/2022]
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24
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Zarei A, Javid H, Sanjarian S, Senemar S, Zarei H. Metagenomics studies for the diagnosis and treatment of prostate cancer. Prostate 2022; 82:289-297. [PMID: 34855234 DOI: 10.1002/pros.24276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 11/09/2021] [Accepted: 11/19/2021] [Indexed: 12/19/2022]
Abstract
AIM Mutation occurs in the prostate cell genes, leading to abnormal prostate proliferation and ultimately cancer. Prostate cancer (PC) is one of the most common cancers amongst men, and its prevalence worldwide increases relative to men's age. About 16% of the world's cancers are the result of microbes in the human body. Impaired population balance of symbiosis microbes in the human reproductive system is linked to PC development. DISCUSSION With the advent of metagenomics science, the genome sequence of the microbiota of the human body has been unveiled. Therefore, it is now possible to identify a higher range of microbiome changes in PC tissue via the Next Generation Technique, which will have positive consequences in personalized medicine. In this review, we intend to question the role of metagenomics studies in the diagnosis and treatment of PC. CONCLUSION The microbial imbalance in the men's genital tract might have an effect on prostate health. Based on next-generation sequencing-generated data, Proteobacteria, Firmicutes, Actinobacteria, and Bacteriodetes are the nine frequent phyla detected in a PC sample, which might be involved in inducing mutation in the prostate cells that cause cancer.
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Affiliation(s)
- Ali Zarei
- Department of Human Genetics, Iranian Academic Center for Education, Culture and Research (ACECR)-Fars Branch Institute for Human Genetics Research, Shiraz, Iran
| | - Hossein Javid
- Department of Human Genetics, Iranian Academic Center for Education, Culture and Research (ACECR)-Fars Branch Institute for Human Genetics Research, Shiraz, Iran
| | - Sara Sanjarian
- Department of Human Genetics, Iranian Academic Center for Education, Culture and Research (ACECR)-Fars Branch Institute for Human Genetics Research, Shiraz, Iran
| | - Sara Senemar
- Department of Human Genetics, Iranian Academic Center for Education, Culture and Research (ACECR)-Fars Branch Institute for Human Genetics Research, Shiraz, Iran
| | - Hanieh Zarei
- Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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25
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Shams M, Khazaei S, Ghasemi E, Nazari N, Javanmardi E, Majidiani H, Bahadory S, Anvari D, Fatollahzadeh M, Nemati T, Asghari A. Prevalence of urinary schistosomiasis in women: a systematic review and meta-analysis of recently published literature (2016-2020). Trop Med Health 2022; 50:12. [PMID: 35093180 PMCID: PMC8800356 DOI: 10.1186/s41182-022-00402-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 01/12/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Urinary schistosomiasis is a serious threat in endemic territories of Africa and the Middle East. The status of female urinary schistosomiasis (FUS) in published literature between 2016 and 2020 was investigated. METHODS A systematic search in PubMed, Scopus, Google Scholar, and Web of Science, based on the 'Preferred Reporting Items for Systematic Reviews and Meta-analyses' checklist, and a meta-analysis using random-effects model to calculate the weighted estimates and 95% confidence intervals (95% CIs) were done. RESULTS Totally, 113 datasets reported data on 40,531 women from 21 African countries, showing a pooled prevalence of 17.5% (95% CI: 14.8-20.5%). Most studies (73) were performed in Nigeria, while highest prevalence was detected in Mozambique 58% (95% CI: 56.9-59.1%) (one study). By sample type and symptoms, vaginal lavage [25.0% (95% CI: 11.4-46.1%)] and hematuria 19.4% (95% CI: 12.2-29.4%) showed higher FUS frequency. Studies using direct microscopy diagnosed a 17.1% (95% CI: 14.5-20.1%) prevalence rate, higher than PCR-based studies 15.3% (95% CI: 6.1-33.2%). Except for sample type, all other variables had significant association with the overall prevalence of FUS. CONCLUSIONS More studies are needed to evaluate the true epidemiology of FUS throughout endemic regions.
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Affiliation(s)
- Morteza Shams
- Zoonotic Diseases Research Center, Ilam University of Medical Sciences, Ilam, Iran
| | - Sasan Khazaei
- Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ezatollah Ghasemi
- Department of Medical Parasitology, School of Medicine, Dezful University of Medical Sciences, Dezful, Iran
| | - Naser Nazari
- Department of Parasitology and Mycology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Erfan Javanmardi
- Clinical Research Development Center, "The Persian Gulf Martyrs" Hospital of Bushehr University of Medical Sciences, Bushehr, Iran
| | - Hamidreza Majidiani
- Department of Basic Medical Sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Saeed Bahadory
- Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Davood Anvari
- Department of Parasitology, Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran
- School of Medicine, Iranshahr University of Medical Sciences, Iranshahr, Iran
| | - Mohammad Fatollahzadeh
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Taher Nemati
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Asghari
- Department of Medical Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
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26
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Padalino G, El-Sakkary N, Liu LJ, Liu C, Harte DSG, Barnes RE, Sayers E, Forde-Thomas J, Whiteland H, Bassetto M, Ferla S, Johnson G, Jones AT, Caffrey CR, Chalmers I, Brancale A, Hoffmann KF. Anti-schistosomal activities of quinoxaline-containing compounds: From hit identification to lead optimisation. Eur J Med Chem 2021; 226:113823. [PMID: 34536671 PMCID: PMC8626775 DOI: 10.1016/j.ejmech.2021.113823] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/13/2021] [Accepted: 08/27/2021] [Indexed: 12/18/2022]
Abstract
Schistosomiasis is a neglected disease of poverty that is caused by infection with blood fluke species contained within the genus Schistosoma. For the last 40 years, control of schistosomiasis in endemic regions has predominantly been facilitated by administration of a single drug, praziquantel. Due to limitations in this mono-chemotherapeutic approach for sustaining schistosomiasis control into the future, alternative anti-schistosomal compounds are increasingly being sought by the drug discovery community. Herein, we describe a multi-pronged, integrated strategy that led to the identification and further exploration of the quinoxaline core as a promising anti-schistosomal scaffold. Firstly, phenotypic screening of commercially available small molecules resulted in the identification of a moderately active hit compound against Schistosoma mansoni (1, EC50 = 4.59 μM on schistosomula). Secondary exploration of the chemical space around compound 1 led to the identification of a quinoxaline-core containing, non-genotoxic lead (compound 22). Compound 22 demonstrated substantially improved activities on both intra-mammalian (EC50 = 0.44 μM, 0.20 μM and 84.7 nM, on schistosomula, juvenile and adult worms, respectively) and intra-molluscan (sporocyst) S. mansoni lifecycle stages. Further medicinal chemistry optimisation of compound 22, resulting in the generation of 20 additional analogues, improved our understanding of the structure-activity relationship and resulted in considerable improvements in both anti-schistosome potency and selectivity (e.g. compound 30; EC50 = 2.59 nM on adult worms; selectivity index compared to the HepG2 cell line = 348). Some derivatives of compound 22 (e.g. 31 and 33) also demonstrated significant activity against the two other medically important species, Schistosoma haematobium and Schistosoma japonicum. Further optimisation of this class of anti-schistosomal is ongoing and could lead to the development of an urgently needed alternative to praziquantel for assisting in schistosomiasis elimination strategies. Lead compound 22 was identified with EC50 of 0.44 µM and 84.7 nM for schistosomula and adult worms. 20 analogues of the lead compound 22 were synthesised. Compounds 25, 30 and 32 showed the best selectivity profile. Compounds 31 and 33 are the most active on three medically important schistosome species.
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Affiliation(s)
- Gilda Padalino
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom
| | - Nelly El-Sakkary
- Center for Discovery and Innovation in Parasitic Diseases (CDIPD), Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Lawrence J Liu
- Center for Discovery and Innovation in Parasitic Diseases (CDIPD), Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Chenxi Liu
- Center for Discovery and Innovation in Parasitic Diseases (CDIPD), Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Danielle S G Harte
- Swansea University Medical School, Swansea University, Swansea, SA2 8PP, United Kingdom
| | - Rachel E Barnes
- Swansea University Medical School, Swansea University, Swansea, SA2 8PP, United Kingdom
| | - Edward Sayers
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, United Kingdom
| | - Josephine Forde-Thomas
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom
| | - Helen Whiteland
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom
| | - Marcella Bassetto
- Department of Chemistry, College of Science and Engineering, Swansea University, Swansea, SA2 8PP, United Kingdom
| | - Salvatore Ferla
- Swansea University Medical School, Swansea University, Swansea, SA2 8PP, United Kingdom
| | - George Johnson
- Swansea University Medical School, Swansea University, Swansea, SA2 8PP, United Kingdom
| | - Arwyn T Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, United Kingdom
| | - Conor R Caffrey
- Center for Discovery and Innovation in Parasitic Diseases (CDIPD), Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Iain Chalmers
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom
| | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, United Kingdom
| | - Karl F Hoffmann
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom.
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27
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Sangare M, Berthe A, Dolo H, Diabaté AF, Konipo FDN, Soumaoro L, Doumbia SS, Coulibaly ME, Diarra L, Sanogo Y, Atsou KM, Diallo AA, Coulibaly SY, Keita M, Doumbia S, Coulibaly YI. Evaluation of mass drug administration for schistosomiasis and soil-transmitted helminths in school-aged children in Bankass, Mali. Int J Infect Dis 2021; 112:196-201. [PMID: 34481965 DOI: 10.1016/j.ijid.2021.08.063] [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: 04/12/2021] [Revised: 08/20/2021] [Accepted: 08/26/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND In 2004, Mali implemented mass drug administration (MDA) aimed at controlling schistosomiasis and soil-transmitted helminths. Despite several rounds of MDA, the health district of Bankass reported low coverage (64.8%) for praziquantel and albendazole in 2017, meaning that this district was still facing challenges in accomplishing the targeted 75% coverage. This study aimed to explore the barriers and gaps that hindered MDA implementation in Bankass. METHODS A cross-sectional study was performed. Questionnaires were administrated to all school-aged children in randomly selected villages. Technical directors of community health centers and community drug distributors in the selected villages were included in the interviews. RESULTS A total of 2128 children and 52 health workers were interviewed. Coverage rates were 93.51% (1990/2128) for praziquantel and 95.25% (2027/2128) for albendazole. Among the untreated children, 31.63% (31/98) reported being unaware of the campaign and 26.53% (26/98) were unable to reach the distribution points. Most of the health workers suggested increasing incentives. CONCLUSION The data showed satisfactory coverage >90%, in contrast with lower rates initially reported by the district health information system. These results raise concerns about the reliability of programmatic data and highlight the importance of population-based surveys for the evaluation of control interventions.
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Affiliation(s)
- Moussa Sangare
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali.
| | - Adama Berthe
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Housseini Dolo
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Abdoul Fatao Diabaté
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Fatoumata Dite Nènè Konipo
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Lamine Soumaoro
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Salif Seriba Doumbia
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Michel Emmanuel Coulibaly
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Lamine Diarra
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Yacouba Sanogo
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Kueshivi Midodji Atsou
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Abdallah Amadou Diallo
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Siaka Yamoussa Coulibaly
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | | | - Seydou Doumbia
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali
| | - Yaya Ibrahim Coulibaly
- International Center for Excellence in Research Mali (ICER-Mali), University of Sciences, Techniques, and Technologies of Bamako (USTTB), Bamako, Mali; Dermatology Hospital of Bamako, Bamako, Mali
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