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Recent advances in anti-coxsackievirus A16 viral drug research. Future Med Chem 2023; 15:97-117. [PMID: 36538291 DOI: 10.4155/fmc-2022-0195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Hand, foot and mouth disease, a childhood disorder caused by enteroviruses, is intermittently endemic in the Asia-Pacific region and endangers the lives of many infants and young children. Coxsackievirus A16 (CV-A16) is one of the major pathogens causing hand, foot, and mouth disease on occasion, resulting in catastrophic neurological sequelae and patient death. Currently, no clinical interventions are available that completely block the CV-A16 infection. Therefore, research on anti-CV-A16 treatment continues to be a significant focus of interest. This report provides a detailed background on and an introduction to CV-A16; a description of the viral gene and protein structures and a summary of the current advances in pharmaceutical targets, drug research and other related areas.
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Ngere SH, Akelo V, Ondeng’e K, Ridzon R, Otieno P, Nyanjom M, Omore R, Barr BAT. Traditional Medicine Beliefs and Practices among Caregivers of Children under Five Years-The Child Health and Mortality Prevention Surveillance (CHAMPS), Western Kenya: A qualitative study. PLoS One 2022; 17:e0276735. [PMID: 36322582 PMCID: PMC9629611 DOI: 10.1371/journal.pone.0276735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/13/2022] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Approximately 80% of the population residing in sub-Saharan Africa relies on Traditional Medicine (TM). However, literature on factors motivating the use of TM for children under the age of five in these settings is limited. Such information can guide policy formulation for integration of TM into mainstream health care services. This study aimed to describe the motivation on use of TM among caregivers of children residing in rural and urban communities in western Kenya. METHODS The socio-behavioral sciences (SBS) arm of the Child Health and Mortality Prevention Surveillance (CHAMPS) program in western Kenya, conducted a cross-sectional qualitative study in Manyatta-an urban informal settlement located in Kisumu town and Karemo-a rural setting in Siaya County. We performed 29 in-depth interviews, 5 focus group discussions and 11 semi-structured interviews with community representatives (n = 53), health workers (n = 17), and community leaders (n = 18). All the participants were purposively sampled. We performed thematic analysis using both inductive and deductive approaches. Data management was completed on Nvivo 11.0 software (QSR International, Melbourne, Australia). RESULTS Our findings reveal that some caregivers prefer TM to treat some childhood diseases. Use of TM was informed by illness beliefs about etiology of disease. We observed an appreciation from the study participants that malaria can effectively be treated by Conventional Medicine (CM) while TM was preferred to treat measles and diseases believed to be associated with supernatural etiology such as witchcraft, evil spirit or breaching cultural taboos. TM was also used in instances where CM failed to provide a diagnosis or when CM was 'slow'. TM in such cases was used as a last resort. CONCLUSION We observed varied beliefs that motivate caregivers' choice of TM use among children in western Kenya. It is therefore crucial to consider perceptions and socio-cultural beliefs about illnesses when formulating interventions that are geared towards child health.
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Affiliation(s)
- Sarah Hawi Ngere
- Kenya Medical Research Institute, Center for Global Health Research, (KEMRI-CGHR), Kisumu, Kenya
- * E-mail:
| | - Victor Akelo
- Centers for Disease Control and prevention (CDC), Nairobi, Kenya
| | - Ken Ondeng’e
- Kenya Medical Research Institute, Center for Global Health Research, (KEMRI-CGHR), Kisumu, Kenya
| | - Renee Ridzon
- Centers for Disease Control and prevention (CDC), Nairobi, Kenya
| | - Peter Otieno
- Kenya Medical Research Institute, Center for Global Health Research, (KEMRI-CGHR), Kisumu, Kenya
| | - Maryanne Nyanjom
- Kenya Medical Research Institute, Center for Global Health Research, (KEMRI-CGHR), Kisumu, Kenya
| | - Richard Omore
- Kenya Medical Research Institute, Center for Global Health Research, (KEMRI-CGHR), Kisumu, Kenya
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Leung AKC, Lam JM, Barankin B, Leong KF, Hon KL. Hand, Foot, and Mouth Disease: A Narrative Review. RECENT ADVANCES IN INFLAMMATION & ALLERGY DRUG DISCOVERY 2022; 16:77-95. [PMID: 36284392 DOI: 10.2174/1570180820666221024095837] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/08/2022] [Accepted: 09/19/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Hand, foot, and mouth disease is a common viral disease in childhood. Because the disease has the potential to reach epidemic levels and mortality is high in some countries, early recognition of this disease is of paramount importance. OBJECTIVE This purpose of this article is to familiarize pediatricians with the clinical manifestations and management of hand, foot, and mouth disease. METHODS A search was conducted in February 2022 in PubMed Clinical Queries using the key term "hand, foot, and mouth disease". The search strategy included all clinical trials, observational studies, and reviews published within the past 10 years. Only papers published in English were included in this review. RESULTS Hand, foot, and mouth disease is characterized by a painful oral enanthem and asymptomatic exanthem on the palms and soles. Children younger than 5 years are most commonly affected. Hand, foot, and mouth disease caused by enterovirus A71 is more severe and has a higher rate of complications than that attributed to other viruses such as coxsackievirus A16. Circulatory failure secondary to myocardial impairment and neurogenic pulmonary edema secondary to brainstem damage are the main causes of death. Fortunately, the disease is usually benign and resolves in 7 to10 days without sequelae. Given the self-limited nature of most cases, treatment is mainly symptomatic and supportive. Intravenous immunoglobulin should be considered for the treatment of severe/complicated hand, foot, and mouth disease and has been recommended by several national and international guideline committees. Currently, there are no specific antiviral agents approved for the treatment of the disease. Drugs such as ribavirin, suramin, mulberroside C, aminothiazole analogs, and sertraline have emerged as potential candidates for the treatment of hand, foot, and mouth disease. Vaccination of susceptible individuals in high-risk areas and good personal hygiene are important preventative measures to combat the disease. CONCLUSION Familiarity of the disease including its atypical manifestations is crucial so that a correct diagnosis can be made, and appropriate treatment initiated. A timely diagnosis can help avoid contact with the affected individual and decrease the risk of an outbreak.
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Affiliation(s)
- Alexander K C Leung
- Department of Paediatrics, The University of Calgary, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Joseph M Lam
- Department of Pediatrics and Department of Dermatology and Skin Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Kin Fon Leong
- Pediatric Institute, Kuala Lumpur General Hospital, Kuala Lumpur, Malaysia
| | - Kam Lun Hon
- Department of Paediatrics, Hong Kong Institute of Integrative Medicine, and the Jockey Club School of Public Health and Primary Care, The Chinese University Hong Kong, Hong Kong
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Tee HK, Zainol MI, Sam IC, Chan YF. Recent advances in the understanding of enterovirus A71 infection: a focus on neuropathogenesis. Expert Rev Anti Infect Ther 2021; 19:733-747. [PMID: 33183118 DOI: 10.1080/14787210.2021.1851194] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Introduction: Hand, foot, and mouth disease caused by enterovirus A71 (EV-A71) is more frequently associated with neurological complications and deaths compared to other enteroviruses.Areas covered: The authors discuss current understanding of the neuropathogenesis of EV-A71 based on various clinical, human, and animal model studies. The authors discuss the important advancements in virus entry, virus dissemination, and neuroinvasion. The authors highlight the role of host immune system, host genetic factors, viral quasispecies, and heparan sulfate in EV-A71 neuropathogenesis.Expert opinion: Comparison of EV-A71 with EV-D68 and PV shows similarity in primary target sites and dissemination to the central nervous system. More research is needed to understand cellular tropisms, persistence of EV-A71, and other possible invasion routes. EV-A71 infection has varied clinical manifestations which may be attributed to multiple receptors usage. Future development of antivirals and vaccines should target neurotropic enteroviruses. Repurposing drug and immunomodulators used in combination could reduce the severity of EV-A71 infection. Only a few drugs have been tested in clinical trials, and in the absence of antiviral and vaccines (except China), active virus surveillance, good hand hygiene, and physical distancing should be advocated. A better understanding of EV-A71 neuropathogenesis is critical for antiviral and multivalent vaccines development.
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Affiliation(s)
- Han Kang Tee
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Izwan Zainol
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - I-Ching Sam
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yoke Fun Chan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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Song H, Hou X, Zeng M, Chen X, Chen X, Yang T, Xu F, Peng J, Peng Q, Cai X, Yu R. Traditional Chinese Medicine Li-Zhong-Tang accelerates the healing of indomethacin-induced gastric ulcers in rats by affecting TLR-2/MyD88 signaling pathway. JOURNAL OF ETHNOPHARMACOLOGY 2020; 259:112979. [PMID: 32442585 DOI: 10.1016/j.jep.2020.112979] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/25/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Li-Zhong-Tang (LZT) is a well-known Chinese herbal formulation first described in one of traditional Chinese medicine (TCM) scriptures, Treatise on Febrile Diseases. LZT has been commonly prescribed for the treatment of various gastrointestinal diseases for over 1800 years, and has demonstrated pronounced therapeutic effects on patients with gastric ulcers. AIM OF THE STUDY The present study aimed to scientifically evaluate protective effects of LZT on indomethacin (IND)-induced gastric injury in rats and to elucidate whether LZT exerts its gastro-protective effects via enhancing mucosal immunity by regulating TLR-2/MyD88 signaling pathway. MATERIAL AND METHODS Gastric ulcers were induced in male Sprague-Dawley (SD) rats with a single oral dose of 150 mg/kg IND. Ulcer index (UI) and curative index (CI) were evaluated. Histopathological examinations were performed and microscopic score (MS) was macroscopically calculated. The volume of gastric juice, free acidity, total acidity, and gastric pH was measured. The gastroprotective and inflammatory biomarkers including levels of nitric oxide (NO), tumor necrosis factor-α (TNF-α), prostaglandin E2 (PGE2), and malondialdehyde (MDA) were determined. Expression levels of TLR-2 and MyD88 mRNA were assessed by qRT-PCR. The expression, distribution, and co-localization of TLR-2 and MyD88 protein were determined by Western blot, immunohistochemistry, and immunofluorescence, respectively. RESULTS Induction of gastric ulcers in rats resulted in very significantly increased UI and elevated volume and acidity of gastric juice, which were markedly attenuated by LZT treatment. Microscopic examinations of the IND-induced gastric ulcers revealed severe gastric hemorrhagic necrosis, submucosal edema, and destruction of epithelial cells, which were significantly attenuated in LZT-treated rats. Moreover, treatment with LZT remarkably increased gastric mucosal levels of PGE2 and NO, and lowered highly elevated levels of TNF-α and MDA in gastric ulcerative rats. Mechanistically, LZT inhibited mRNA and protein expression of TLR-2 and MyD88 and enhanced immune function in gastric mucosa. Immunohistochemical analyses and immunofluorescent detection further confirmed a markedly decreased co-localization of TLR-2 and MyD88 protein in the gastric mucosa of LZT-treated rats as compared to that of gastric ulcerative rats. CONCLUSIONS These findings indicate that LZT alleviates serious gastric mucosal ulcerations induced by IND. Protective effects of LZT on gastric ulcers are believed to be associated with the intensification of the anti-oxidative defense system, mitigation of proinflammatory cytokines, stimulation of the production of cytoprotective mediators, and improvement of the mucosal immunity through TLR-2/MyD88 signaling pathway.
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Affiliation(s)
- Houpan Song
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Xueqin Hou
- Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai' an, Shandong, 271016, China.
| | - Meiyan Zeng
- Hunan Provincial Key Laboratory of Translational Research in TCM Prescriptions and Zheng, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Xiaojuan Chen
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China; Hunan Provincial Key Laboratory of Translational Research in TCM Prescriptions and Zheng, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Xinyi Chen
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China; Hunan Provincial Key Laboratory of Translational Research in TCM Prescriptions and Zheng, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Tao Yang
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Fuping Xu
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510120, China.
| | - Jun Peng
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Qinghua Peng
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Xiong Cai
- Hunan Provincial Key Laboratory of Diagnostic Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China; Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
| | - Rong Yu
- Hunan Provincial Key Laboratory of Translational Research in TCM Prescriptions and Zheng, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China.
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Velástegui J, Cova L, Galarza Y, Fierro P, León Baryolo L, Bustillos A. [A case report of hand, foot, and mouth disease with necrotizing mucocutaneous lesions]. Medwave 2019; 19:e7683. [PMID: 31442216 DOI: 10.5867/medwave.2019.07.7683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/07/2019] [Indexed: 11/27/2022] Open
Abstract
In most cases, the cause of hand, foot, and mouth disease (HFMD) is coxsackievirus A type 16. The infection can also be caused by other strains of coxsackievirus, spreading mainly by the oral-fecal route, while it is less likely to be transmitted through secretions. HFMD occurs mainly in summer and is more common in children under ten. Skin lesions develop during the disease but rarely become necrotic. When present, they are a severe complication requiring hospitalization. This paper reports the case of a patient with HFMD who developed necrotic mucocutaneous lesions that responded favorably to intravenous acyclovir, fluids, and electrolyte support therapy.
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Affiliation(s)
- Janett Velástegui
- Hospital General Docente Ambato, Unidad de Pediatría, Ambato, Ecuador. ORCID: 0000-0002-3921-1185
| | - Ligia Cova
- Hospital General Docente Ambato, Unidad de Pediatría, Ambato, Ecuador. ORCID: 0000-0002-5586-6130
| | - Yomaira Galarza
- Hospital General Docente Ambato, Unidad de Pediatría, Ambato, Ecuador. ORCID: 0000-0002-7055-6149
| | - Pablo Fierro
- Hospital General Docente Ambato, Unidad de Pediatría, Ambato, Ecuador. ORCID: 0000-0002-6380-2882
| | - Lenier León Baryolo
- Carrera de Medicina, Facultad de Ciencias de la Salud, Universidad Técnica de Ambato, Ambato, Ecuador. ORCID: 0000-0002-8140-4140
| | - Alberto Bustillos
- Carrera de Medicina, Facultad de Ciencias de la Salud, Universidad Técnica de Ambato, Ambato, Ecuador. Address: Avenida Colombia y Chile CP 180104, Ambato, Tungurahua. . ORCID: 0000-0002-4409-8113
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