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Eini P, Hatami M, Eini P, Poorolajal J. Evaluation and Comparison of Serum Vitamin D Levels between Injection Drug Users with and without Chronic Hepatitis C Infection in Hamadan-Iran. MAEDICA 2023; 18:437-441. [PMID: 38023763 PMCID: PMC10674129 DOI: 10.26574/maedica.2023.18.3.437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Background and objective: Hepatitis C virus (HCV) infection causes disruption in the metabolism of biochemicals, such as vitamin D, and subsequently alters their serum level via the involvement of the liver. The current study aimed at determining the serum level of vitamin D in injection drug users with chronic HCV infection. Methods:The current case-control study was conducted on 46 injection drug users referred to Imam Khomeini Specialty Clinic in Hamadan City, Iran, between 2017 and 2019, when their HCV infection was diagnosed with HCV PCR test, and 46 healthy injection drug users as the control group in order to compare serum vitamin D levels and liver enzymes. Both the case and control groups were matched for age and gender. ELISA technique was used to measure serum vitamin D level. The collected data were analyzed with STATA software based on 95% significance level. Results:In the present study, 43 (93.5%) of all subjects were male and three (6.6%) females. The mean age of subjects in the case and control groups was 41.87 ± 11.97 and 40.66 ± 11.89 years, respectively. The mean serum vitamin D levels in the case and control groups were 21.20 ± 19.84 and 42.42 ± 29.08 ng/L, respectively (P = 0.001). The mean serum vitamin D levels in the injection drug users with mild, moderate, and severe HCV infection was 32.90, 30.34 and 29.74 ng/L, respectively (P = 0.454). The correlation between vitamin D level and AST and ALT enzymes was -0.053 and -0.103, respectively (P >0.05). Conclusion:Serum vitamin D level decreases in addicts with chronic HCV infection. With increasing the severity of HCV infection, the serum level of vitamin D decreases.
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Affiliation(s)
- Peyman Eini
- Department of Infectious Diseases, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | - Pooya Eini
- Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jalal Poorolajal
- Department of Epidemiology, Hamadan University of Medical Sciences, Hamadan, Iran
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2
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Calcaterra V, Magenes VC, Tagi VM, Grazi R, Bianchi A, Cena H, Zuccotti G, Fabiano V. Association between Vitamin D Levels, Puberty Timing, and Age at Menarche. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1243. [PMID: 37508740 PMCID: PMC10378582 DOI: 10.3390/children10071243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/15/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023]
Abstract
Pubertal development represents the process of physical maturation where an adolescent reaches sexual maturity and attains reproductive function. The effects of vitamin D are mainly mediated by the vitamin D receptor (VDR), which is expressed in almost all body cells, including the ovary and human pituitary gland and animal hypothalamus. Thus, vitamin D has gained great interest as pathogenic factor of pubertal disorders and fertility. This narrative review aimed to provide a broad overview of the available literature regarding the association between vitamin D levels, puberty timing, and age at menarche. A review of the data on the involvement of micronutrient deficiency, as a modifiable cause of pubertal disorders, is important for the prediction and prevention of deficiencies as well as for fertility protection and should be considered a public health priority. Reported data support that vitamin D is a regulator of neuroendocrine and ovarian physiology and, more in detail, a deficiency of vitamin D is involved in altered pubertal timing. Considering the long-term consequences of early pubertal development and early menarche, the detection of modifiable causes is crucial in preventive strategies. Future studies in humans and with an increased scale are needed to elucidate the vitamin D role in sexual maturation and puberty development.
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Affiliation(s)
- Valeria Calcaterra
- Department of Internal Medicine and Therapeutics, University of Pavia, 27100 Pavia, Italy
- Pediatric Department, Buzzi Children's Hospital, 20154 Milano, Italy
| | | | | | - Roberta Grazi
- Pediatric Department, Buzzi Children's Hospital, 20154 Milano, Italy
| | - Alice Bianchi
- Pediatric Department, Buzzi Children's Hospital, 20154 Milano, Italy
| | - Hellas Cena
- Laboratory of Dietetics and Clinical Nutrition, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
- Clinical Nutrition and Dietetics Service, Unit of Internal Medicine and Endocrinology, Clinical Scientific Institutes Maugeri IRCCS, 27100 Pavia, Italy
| | - Gianvincenzo Zuccotti
- Pediatric Department, Buzzi Children's Hospital, 20154 Milano, Italy
- Department of Biomedical and Clinical Science, University of Milano, 20157 Milano, Italy
| | - Valentina Fabiano
- Pediatric Department, Buzzi Children's Hospital, 20154 Milano, Italy
- Department of Biomedical and Clinical Science, University of Milano, 20157 Milano, Italy
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3
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Domenici R, Vierucci F. Exclusive Breastfeeding and Vitamin D Supplementation: A Positive Synergistic Effect on Prevention of Childhood Infections? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052973. [PMID: 35270666 PMCID: PMC8910000 DOI: 10.3390/ijerph19052973] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 02/01/2023]
Abstract
Human milk is the best food for infants. Breastfeeding has been associated with a reduced risk of viral and bacterial infections. Breast milk contains the perfect amount of nutrients needed to promote infant growth, except for vitamin D. Vitamin D is crucial for calcium metabolism and bone health, and it also has extra-skeletal actions, involving innate and adaptive immunity. As exclusive breastfeeding is a risk factor for vitamin D deficiency, infants should be supplemented with vitamin D at least during the first year. The promotion of breastfeeding and vitamin D supplementation represents an important objective of public health.
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4
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Liu G, Hong T, Yang J. A Single Large Dose of Vitamin D Could be Used as a Means of Coronavirus Disease 2019 Prevention and Treatment. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:3429-3434. [PMID: 32904593 PMCID: PMC7457388 DOI: 10.2147/dddt.s271754] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/07/2020] [Indexed: 12/14/2022]
Abstract
There is no specific and effective medication for coronavirus disease 2019 (COVID-19), and avaccine is not available in recent months. Here, we hypothesize that a single large dose of vitamin D (Vit D) could be an option for trial in COVID-19. Vit D deficiency or insufficiency is very common in the general population as well as in patients with COVID-19. It has been shown that low Vit D level is associated with viral infection, and Vit D supplementation is beneficial for people infected with viruses, such as HIV and hepatitis C virus. Although COVID-19 is a respiratory disease, the morbidity and mortality of this disease are driven by coagulopathy. Clinical studies have shown that Vit D can exert anticoagulant effects. Vit D, a lipid-soluble vitamin, can be administered as a draught. Vit D supplementation is safe and has rare toxic events. In addition, the cost of Vit D is fairly low. Based on these observations, we speculate that a single dose of 300,000 IU Vit D may have a role in the prevention and treatment of COVID-19.
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Affiliation(s)
- Guoqiang Liu
- Department of Endocrinology and Metabolism, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Tianpei Hong
- Department of Endocrinology and Metabolism, Peking University Third Hospital, Beijing 100191, People's Republic of China
| | - Jin Yang
- Department of Endocrinology and Metabolism, Peking University Third Hospital, Beijing 100191, People's Republic of China
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5
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Lee C. Controversial Effects of Vitamin D and Related Genes on Viral Infections, Pathogenesis, and Treatment Outcomes. Nutrients 2020; 12:nu12040962. [PMID: 32235600 PMCID: PMC7230640 DOI: 10.3390/nu12040962] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/23/2020] [Accepted: 03/26/2020] [Indexed: 12/11/2022] Open
Abstract
Vitamin D (VD) plays an essential role in mineral homeostasis and bone remodeling. A number of different VD-related genes (VDRG) are required for the metabolic activation of VD and the subsequent induction of its target genes. They include a set of genes that encode for VD-binding protein, metabolic enzymes, and the VD receptor. In addition to its well-characterized skeletal function, the immunoregulatory activities of VD and the related polymorphisms of VDRG have been reported and linked to its therapeutic and preventive actions for the control of several viral diseases. However, in regards to their roles in the progression of viral diseases, inconsistent and, in some cases, contradictory results also exist. To resolve this discrepancy, I conducted an extensive literature search by using relevant keywords on the PubMed website. Based on the volume of hit papers related to a certain viral infection, I summarized and compared the effects of VD and VDRG polymorphism on the infection, pathogenesis, and treatment outcomes of clinically important viral diseases. They include viral hepatitis, respiratory viral infections, acquired immunodeficiency syndrome (AIDS), and other viral diseases, which are caused by herpesviruses, dengue virus, rotavirus, and human papillomavirus. This review will provide the most current information on the nutritional and clinical utilization of VD and VDRG in the management of the key viral diseases. This information should be valuable not only to nutritionists but also to clinicians who wish to provide evidence-based recommendations on the use of VD to virally infected patients.
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Affiliation(s)
- Choongho Lee
- College of Pharmacy, Dongguk University, Goyang 10326, Korea
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6
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Savić Ž, Vračarić V, Milić N, Nićiforović D, Damjanov D, Pellicano R, Medić-Stojanoska M, Abenavoli L. Vitamin D supplementation in patients with alcoholic liver cirrhosis: a prospective study. Minerva Med 2018; 109:352-357. [PMID: 29963831 DOI: 10.23736/s0026-4806.18.05723-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The liver is involved in the metabolism of vitamin D. The prevalence of osteopenia in alcoholic liver disease (ALD) patients is 34-48%, and the prevalence of osteoporosis is 11-36%. Advanced liver disease is considered a risk factor for the development of osteoporosis. The aim of this study was to establish the relationship between vitamin D level and Child-Pugh score in patients with alcoholic liver cirrhosis (ALC), and to evaluate the effects of oral vitamin D supplementation. METHODS Seventy male ALC patients in the absence of active alcohol intake were enrolled and their clinical and laboratory data were recorded. A supplementation of cholecalciferol 1000 IU/day was administered. The vitamin D status was analyzed during the study, in patients stratified by Child-Pugh score. RESULTS The study was completed by fifty patients. At the enrollment, the mean level of vitamin D was 60.73±28.02, 50.53±39.52 and 26.71±12.81 nmol/L, respectively for Child-Pugh score class A, B and C. During vitamin D supplementation it was found in all the patients a significant increase of its levels during the first six months (P<0.05). However, in class C the improvement was consistent also after year (P<0.05). At the end of the study, two of seven patients initially in class C changed in class A, four from class C to B, and one remained in class C (P=0.012). Out of seventeen patients initially in class B, eleven changed to class A, and six remained in class B. CONCLUSIONS In patients with ALC, higher level of vitamin D level is related with lower Child-Pugh score. The supplementation of 1000 IU/day of vitamin D in these patients was optimal for a period of at least six months. A decrease in the Child-Pugh score was also found, with a redistribution of the patients in different classes.
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Affiliation(s)
- Željka Savić
- Clinic of Gastroenterology and Hepatology, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Vladimir Vračarić
- Clinic of Gastroenterology and Hepatology, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Nataša Milić
- Department of Pharmacy, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Dijana Nićiforović
- Clinic of Radiology, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Dragomir Damjanov
- Clinic of Gastroenterology and Hepatology, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | | | - Milica Medić-Stojanoska
- Clinic for Endocrinology, Diabetes, and Metabolic Diseases, Clinical Center of Vojvodina, University of Novi Sad, Novi Sad, Serbia
| | - Ludovico Abenavoli
- Department of Health Sciences, Magna Græcia University, Catanzaro, Italy -
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7
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Saggese G, Vierucci F, Prodam F, Cardinale F, Cetin I, Chiappini E, de’ Angelis GL, Massari M, Miraglia Del Giudice E, Miraglia Del Giudice M, Peroni D, Terracciano L, Agostiniani R, Careddu D, Ghiglioni DG, Bona G, Di Mauro G, Corsello G. Vitamin D in pediatric age: consensus of the Italian Pediatric Society and the Italian Society of Preventive and Social Pediatrics, jointly with the Italian Federation of Pediatricians. Ital J Pediatr 2018; 44:51. [PMID: 29739471 PMCID: PMC5941617 DOI: 10.1186/s13052-018-0488-7] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 04/16/2018] [Indexed: 02/07/2023] Open
Abstract
Vitamin D plays a pivotal role in the regulation of calcium-phosphorus metabolism, particularly during pediatric age when nutritional rickets and impaired bone mass acquisition may occur.Besides its historical skeletal functions, in the last years it has been demonstrated that vitamin D directly or indirectly regulates up to 1250 genes, playing so-called extraskeletal actions. Indeed, recent data suggest a possible role of vitamin D in the pathogenesis of several pathological conditions, including infectious, allergic and autoimmune diseases. Thus, vitamin D deficiency may affect not only musculoskeletal health but also a potentially wide range of acute and chronic conditions. At present, the prevalence of vitamin D deficiency is high in Italian children and adolescents, and national recommendations on vitamin D supplementation during pediatric age are lacking. An expert panel of the Italian Society of Preventive and Social Pediatrics reviewed available literature focusing on randomized controlled trials of vitamin D supplementation to provide a practical approach to vitamin D supplementation for infants, children and adolescents.
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Affiliation(s)
- Giuseppe Saggese
- Department of Clinical and Experimental Medicine, Section of Paediatrics, University of Pisa, Pisa, Italy
| | | | - Flavia Prodam
- Division of Pediatrics, Department of Health Sciences, Interdisciplinary Research Center of Autoimmune Diseases (IRCAD), University of Piemonte Orientale, Novara, Italy
| | - Fabio Cardinale
- Pediatric Unit, Division of Pulmonology, Allergy, and Immunology, AOU Policlinico-Giovanni XXIII, Bari, Italy
| | - Irene Cetin
- Department of Mother and Child, Hospital Luigi Sacco, University of Milano, Milan, Italy
| | - Elena Chiappini
- Pediatric Infectious Disease Unit, Department of Health Sciences, University of Florence, Anna Meyer Children’s University Hospital, Florence, Italy
| | - Gian Luigi de’ Angelis
- Gastroenterology and Digestive Endoscopy Unit and Clinical Paediatrics Unit, Department of Paediatrics and Maternal Medicine, University of Parma Hospital Trust, Parma, Italy
| | - Maddalena Massari
- Department of Mother and Child, Hospital Luigi Sacco, University of Milano, Milan, Italy
| | - Emanuele Miraglia Del Giudice
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Michele Miraglia Del Giudice
- Department of Woman, Child and General and Specialist Surgery, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Diego Peroni
- Department of Clinical and Experimental Medicine, Section of Paediatrics, University of Pisa, Pisa, Italy
| | - Luigi Terracciano
- Pediatric Primary Care, National Pediatric Health Care System, Milan, Italy
| | | | - Domenico Careddu
- Pediatric Primary Care, National Pediatric Health Care System, Novara, Italy
| | - Daniele Giovanni Ghiglioni
- Pediatric Highly Intensive Care Unit, Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Gianni Bona
- Division of Pediatrics, University of Piemonte Orientale, Novara, Italy
| | - Giuseppe Di Mauro
- Pediatric Primary Care, National Pediatric Health Care System, Caserta, Italy
| | - Giovanni Corsello
- Department of Sciences for Health Promotion and Mother and Child Care, Neonatal Intensive Care Unit, AOUP, University of Palermo, Palermo, Italy
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8
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Hoan NX, Tong HV, Song LH, Meyer CG, Velavan TP. Vitamin D deficiency and hepatitis viruses-associated liver diseases: A literature review. World J Gastroenterol 2018; 24:445-460. [PMID: 29398866 PMCID: PMC5787780 DOI: 10.3748/wjg.v24.i4.445] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/08/2018] [Accepted: 01/15/2018] [Indexed: 02/06/2023] Open
Abstract
The secosteroid hormone vitamin D has, in addition to its effects in bone metabolism also functions in the modulation of immune responses against infectious agents and in inhibiting tumorigenesis. Thus, deficiency of vitamin D is associated with several malignancies, but also with a plethora of infectious diseases. Among other communicable diseases, vitamin D deficiency is involved in the pathogenesis of chronic liver diseases caused by hepatitis B and C viruses (HBV, HCV) and high prevalence of vitamin D deficiency with serum levels below 20 mg/mL in patients with HBV and HCV infection are found worldwide. Several studies have assessed the effects of vitamin D supplementation on the sustained virological response (SVR) to interferon (IFN) plus ribavirin (RBV) therapy in HBV and HCV infection. In these studies, inconsistent results were reported. This review addresses general aspects of vitamin D deficiency and, in particular, the significance of vitamin D hypovitaminosis in the outcome of HBV- and HCV-related chronic liver diseases. Furthermore, current literature was reviewed in order to understand the effects of vitamin D supplementation in combination with IFN-based therapy on the virological response in HBV and HCV infected patients.
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Affiliation(s)
- Nghiem Xuan Hoan
- Institute of Clinical Infectious Diseases, 108 Military Central Hospital, Hanoi 10004, Vietnam
- Molecular Genetics of Infectious Diseases, Institute of Tropical Medicine, University of Tübingen, Tübingen 72074, Germany
- Vietnamese-German Center of Medical Research (VG-CARE), Hanoi 10004, Vietnam
| | - Hoang Van Tong
- Vietnamese-German Center of Medical Research (VG-CARE), Hanoi 10004, Vietnam
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 10004, Vietnam
| | - Le Huu Song
- Institute of Clinical Infectious Diseases, 108 Military Central Hospital, Hanoi 10004, Vietnam
- Vietnamese-German Center of Medical Research (VG-CARE), Hanoi 10004, Vietnam
| | - Christian G Meyer
- Molecular Genetics of Infectious Diseases, Institute of Tropical Medicine, University of Tübingen, Tübingen 72074, Germany
- Vietnamese-German Center of Medical Research (VG-CARE), Hanoi 10004, Vietnam
- Medical Faculty, Duy Tan University, Da Nang, Vietnam
| | - Thirumalaisamy P Velavan
- Molecular Genetics of Infectious Diseases, Institute of Tropical Medicine, University of Tübingen, Tübingen 72074, Germany
- Vietnamese-German Center of Medical Research (VG-CARE), Hanoi 10004, Vietnam
- Medical Faculty, Duy Tan University, Da Nang, Vietnam
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9
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Vitamin D serostatus and dengue fever progression to dengue hemorrhagic fever/dengue shock syndrome. Epidemiol Infect 2017; 145:2961-2970. [DOI: 10.1017/s0950268817002059] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
SUMMARYVitamin D could modulate pathways leading to dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS). We examined the associations of serum total 25-hydroxy vitamin D [25(OH)D] and vitamin D binding protein (VDBP) concentrations in patients with uncomplicated dengue fever (DF) with risk of progression to DHF/DSS. In a case–control study nested in a cohort of DF patients who were followed during the acute episode in Bucaramanga, Colombia, we compared 25(OH)D and VDBP at onset of fever between 110 cases who progressed to DHF/DSS and 235 DF controls who did not progress. 25(OH)D concentrations were also compared between the acute sample and a sample collected >1 year post-convalescence in a subgroup. Compared with 25(OH)D ⩾75 nmol/l, adjusted odds ratios (95% CI) for progression were 0·44 (0·22–0·88) and 0·13 (0·02–1·05) for 50 to 75 nmol/l (vitamin D insufficiency) and <50 nmol/l (vitamin D deficiency), respectively (P, trend = 0·003). Mean 25(OH)D concentrations were much lower post-convalescence compared with the acute episode, regardless of case status. Compared with controls, mean VDBP was non-significantly lower in cases. We conclude that low serum 25(OH)D concentrations in DF patients predict decreased odds of progression to DHF/DSS.
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10
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Kim HB, Myung SK, Lee YJ, Park BJ. Efficacy of vitamin D supplementation in combination with conventional antiviral therapy in patients with chronic hepatitis C infection: a meta-analysis of randomised controlled trials. J Hum Nutr Diet 2017; 31:168-177. [PMID: 28833855 DOI: 10.1111/jhn.12503] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Although a contributory role of vitamin D levels for the development of chronic hepatitis C has been suggested, the efficacy of vitamin D supplementation in combination with conventional antiviral therapy consisting of pegylated interferon-α (Peg-IFN-α) injection and oral ribavirin (RBV) remains unclear. We investigated its efficacy in the treatment of chronic hepatitis C via a meta-analysis of randomised controlled trials. METHODS We searched PubMed, EMBASE, the Cochrane Library, ClinicalTrials.gov and the bibliographies of relevant articles to locate additional publications in September 2016. Three evaluators independently reviewed and selected eligible studies based on predetermined selection criteria. RESULTS Of 522 articles meeting our initial criteria, a total of seven open-label, randomised controlled trials involving 548 participants, were included in the final analysis. Vitamin D supplementation in combination with Peg-IFN-α injection and oral RBV significantly increased the rate of viral response for hepatitis C at 24 weeks after treatment in a random-effects meta-analysis (relative risk = 1.30; 95% confidence interval = 1.04-1.62; I2 = 75.9%). Also, its significant efficacy was observed in patients with hepatitis C virus genotype 1, which is known to be refractory to antiviral therapy. CONCLUSIONS In summary, we observed that additional use of vitamin D has a positive effect on sustained viral response rates of patients with chronic hepatitis C infection. However, we cannot establish the efficacy because of substantial heterogeneity, a small sample size and a low methodological quality.
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Affiliation(s)
- H-B Kim
- Department of Family Medicine, MyongJi Hospital, Goyang, Gyeonggi-do, Korea.,Department of Family Medicine, School of Medicine, Yonsei University, Seoul, Korea
| | - S-K Myung
- Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Gyeonggi-do, Korea.,Cancer Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center, Goyang, Korea.,Department of Family Medicine, Center for Cancer Prevention and Detection, Hospital, National Cancer Center, Goyang, Korea
| | - Y-J Lee
- Department of Family Medicine, School of Medicine, Yonsei University, Seoul, Korea.,Department of Family Medicine, Gangnam Severance Hospital, Seoul, Korea
| | - B-J Park
- Department of Family Medicine, School of Medicine, Yonsei University, Seoul, Korea.,Department of Family Medicine, Yongin Severance Hospital, Yongin, Gyeonggi-do, Korea
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11
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Abstract
Chronic viral hepatitis is a global health threat and financial burden. Hepatitis B and C viruses (HBV and HCV) are the most common causes of chronic viral hepatitis in the United States. Most cases are asymptomatic before adulthood. Research has resulted in effective therapy for HCV and the promise of effective therapies for HBV. For HCV, therapy is pegylated interferon and ribavirin. Clinical trials with effective direct-acting antiviral agents are underway in pediatrics. For HBV, approved agents are alpha-interferon, lamivudine, adefovir, tenofovir, and entecavir. However, treatment seldom results in functional cure and more effective therapies are urgently needed.
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Affiliation(s)
- Wikrom Karnsakul
- Pediatric Liver Center, Department of Pediatrics, Johns Hopkins University School of Medicine, 600 North Wolfe Street, CMSC 2-117, Baltimore, MD 21287, USA.
| | - Kathleen B Schwarz
- Professor, Pediatric Liver Center, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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12
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Hernández-Alvarez N, Pascasio Acevedo JM, Quintero E, Fernández Vázquez I, García-Eliz M, de la Revilla Negro J, Crespo García J, Hernández-Guerra M. Effect of season and sunlight on viral kinetics during hepatitis C virus therapy. BMJ Open Gastroenterol 2017; 4:e000115. [PMID: 28321328 PMCID: PMC5353279 DOI: 10.1136/bmjgast-2016-000115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/28/2016] [Accepted: 11/28/2016] [Indexed: 02/07/2023] Open
Abstract
Background and aims Rapid viral response (RVR) during antiviral treatment for hepatitis C virus (HCV) predicts sustained viral response (SVR). Recently, vitamin D levels have been associated with SVR. As sunlight is the most important source of vitamin D and shows seasonal variation, we evaluated the effect of season on viral kinetics during peginterferon/ribavirin-based therapy for HCV. Methods Consecutive HCV patients treated with peginterferon/ribavirin and boceprevir/ telaprevir (June 2011–July 2014) were included. Patients were grouped according to season when therapy was initiated (Season A: May–October and Season B: November–April) depending on hours of daily sunlight. Multiple logistic regression analysis included factors known to influence SVR to treatment. The dependent variables were undetectable viral load (VL) or VL ≤15 UI/mL (VL ≤15) at weeks 4, 8 and 12, end of treatment and SVR. Results The study included 930 patients (66.8% men; median 54 years) treated with telaprevir (n=537) or boceprevir, without (n=481) or with lead-in therapy of peginterferon/ribavirin. Baseline characteristics of patients in Season A (45.3%, n=421) and Season B groups were similar. Overall, a higher rate of RVR (23.5% vs 16.1%, p=0.005) and VL ≤15 (51.0% vs 38.6%, p≤0.001) was observed in patients starting treatment during Season A versus Season B. By logistic regression analysis, initiating treatment in Season A proved to be an independent predictor of RVR and VL ≤15. Conclusions In our setting, seasonality affects viral kinetics in HCV genotype 1 patients treated with peginterferon/ribavirin-based therapy. Our findings support the hypothesis that vitamin D influences viral response to peginterferon/ribavirin-based therapy.
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Affiliation(s)
| | | | | | | | - María García-Eliz
- Hospital Universitari i Politècnic La Fe, CIBERehd , Valencia , Spain
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13
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Rieder FJJ, Gröschel C, Kastner MT, Kosulin K, Laengle J, Zadnikar R, Marculescu R, Schneider M, Lion T, Bergmann M, Kallay E, Steininger C. Human cytomegalovirus infection downregulates vitamin-D receptor in mammalian cells. J Steroid Biochem Mol Biol 2017; 165:356-362. [PMID: 27520300 PMCID: PMC5705058 DOI: 10.1016/j.jsbmb.2016.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 08/05/2016] [Accepted: 08/08/2016] [Indexed: 12/31/2022]
Abstract
Vitamin D (VD) is essential for the human body and involved in a wide variety of critical physiological processes including bone, muscle, and cardiovascular health, as well as innate immunity and antimicrobial responses. Here, we elucidated the significance of the VD system in cytomegalovirus (CMV) infection, which is one of the most common opportunistic infections in immunocompromised or -suppressed patients. We found that expression of vitamin D receptor (VDR) was downregulated in CMV-infected cells within 12h [hrs] post infection [p.i.] to 12% relative to VDR expression in mock-infected fibroblasts and did not recover during the CMV replication cycle of 96h. None of the biologically active metabolites of VD, cholecalciferol, calcidiol, or calcitriol, inhibit CMV replication significantly in human fibroblasts. In a feedback loop, expression of CYP24A1 dropped to 3% by 12h p.i. and expression of CYP27B1 increased gradually during the replication cycle of CMV to 970% probably as a consequence of VDR inhibition. VDR expression was not downregulated during influenza virus or adenovirus replication. The potent synthetic vitamin D analog EB-1089 was not able to inhibit CMV replication or antagonize its effect on VDR expression. Only CMV replication, and none of the other viral pathogens evaluated, inhibited the vitamin D system in vitro. In view of the pleiotropism of VDR, CMV-mediated downregulation may have far-reaching virological, immunological, and clinical implications and thus warrant further evaluations in vitro and in vivo.
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Affiliation(s)
- Franz J J Rieder
- Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Charlotte Gröschel
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Marie-Theres Kastner
- Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Karin Kosulin
- Children's Cancer Research Institute, Vienna, Austria
| | - Johannes Laengle
- Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Rene Zadnikar
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Rodrig Marculescu
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Martina Schneider
- Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Thomas Lion
- Children's Cancer Research Institute, Vienna, Austria; Department of Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Michael Bergmann
- Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Enikö Kallay
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Christoph Steininger
- Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria.
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14
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Nama N, Iliriani K, Xia MY, Chen BP, Zhou LL, Pojsupap S, Kappel C, O'Hearn K, Sampson M, Menon K, McNally JD. A pilot validation study of crowdsourcing systematic reviews: update of a searchable database of pediatric clinical trials of high-dose vitamin D. Transl Pediatr 2017; 6:18-26. [PMID: 28164026 PMCID: PMC5253266 DOI: 10.21037/tp.2016.12.01] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Completing large systematic reviews and maintaining them up to date poses significant challenges. This is mainly due to the toll required of a small group of experts to screen and extract potentially eligible citations. Automated approaches have failed so far in providing an accessible and adaptable tool to the research community. Over the past decade, crowdsourcing has become attractive in the scientific field, and implementing it in citation screening could save the investigative team significant work and decrease the time to publication. METHODS Citations from the 2015 update of a pediatrics vitamin D systematic review were uploaded to an online platform designed for crowdsourcing the screening process (http://www.CHEORI.org/en/CrowdScreenOverview). Three sets of exclusion criteria were used for screening, with a review of abstracts at level one, and full-text eligibility determined through two screening stages. Two trained reviewers, who participated in the initial systematic review, established citation eligibility. In parallel, each citation received four independent assessments from an untrained crowd with a medical background. Citations were retained or excluded if they received three congruent assessments. Otherwise, they were reviewed by the principal investigator. Measured outcomes included sensitivity of the crowd to retain eligible studies, and potential work saved defined as citations sorted by the crowd (excluded or retained) without involvement of the principal investigator. RESULTS A total of 148 citations for screening were identified, of which 20 met eligibility criteria (true positives). The four reviewers from the crowd agreed completely on 63% (95% CI: 57-69%) of assessments, and achieved a sensitivity of 100% (95% CI: 88-100%) and a specificity of 99% (95% CI: 96-100%). Potential work saved to the research team was 84% (95% CI: 77-89%) at the abstract screening stage, and 73% (95% CI: 67-79%) through all three levels. In addition, different thresholds for citation retention and exclusion were assessed. With an algorithm favoring sensitivity (citation excluded only if all four reviewers agree), sensitivity was maintained at 100%, with a decrease of potential work saved to 66% (95% CI: 59-71%). In contrast, increasing the threshold required for retention (exclude all citations not obtaining 3/4 retain assessments) decreased sensitivity to 85% (95% CI: 65-96%), while improving potential workload saved to 92% (95% CI: 88-95%). CONCLUSIONS This study demonstrates the accuracy of crowdsourcing for systematic review citations screening, with retention of all eligible articles and a significant reduction in the work required from the investigative team. Together, these two findings suggest that crowdsourcing could represent a significant advancement in the area of systematic review. Future directions include further study to assess validity across medical fields and determination of the capacity of a non-medical crowd.
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Affiliation(s)
- Nassr Nama
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | | | - Meng Yang Xia
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Brian P Chen
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | | | - Supichaya Pojsupap
- Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Coralea Kappel
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Katie O'Hearn
- Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Margaret Sampson
- Department of Volunteers Communication and Information Resources, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Kusum Menon
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada;; Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - James Dayre McNally
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada;; Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
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15
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Pawlowska M, Domagalski K, Pniewska A, Smok B, Halota W, Tretyn A. What's new in hepatitis C virus infections in children? World J Gastroenterol 2015; 21:10783-9. [PMID: 26478670 PMCID: PMC4600580 DOI: 10.3748/wjg.v21.i38.10783] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 06/17/2015] [Accepted: 09/02/2015] [Indexed: 02/06/2023] Open
Abstract
The number of hepatitis C virus (HCV) infection cases is relatively low in children. This low number may be connected with the lack of screening tests and the asymptomatic course of infection. Currently, mother-to-infant transmission is the most common cause of HCV infection amongst children in developed countries. It is important to introduce routine screening tests for HCV in pregnant women. The risk of vertical transmission of HCV is estimated at approximately 5% (3%-10%). Currently, we do not have HCV transmission prevention methods. Some factors could potentially be eliminated by elective caesarean section. Currently, the method of prevention of perinatal HCV infection is the early identification and effective treatment of infections in young women in the preconception period. We describe genetic tests (IL-28B single nucleotide polymorphisms) to identify children with an increased chance of spontaneous clearance or sustained virologic response achievement and vitamin D level as a potential predictor of treatment response in children. It is also important to develop non-invasive tests that can predict liver fibrosis. The existence of differences in the mechanisms leading to liver injury between children and adults creates new perspectives of action to reduce liver disease progression in children in the early years of life.
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