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1.
BMJ Open ; 12(4): e054672, 2022 04 18.
Article in English | MEDLINE | ID: mdl-35437245

ABSTRACT

OBJECTIVE: To evaluate the value of the person-centred, integrated care programme Care Chain Frail Elderly (CCFE) compared with usual care, using multicriteria decision analysis (MCDA). DESIGN: In a 12-month quasi-experimental study, triple-aim outcomes were measured at 0, 6 and 12 months by trained interviewers during home-visits. SETTING: Primary care, community-based elderly care. PARTICIPANTS: 384 community-dwelling frail elderly were enrolled. The 12-month completion rate was 70% in both groups. Propensity score matching was used to balance age, gender, marital status, living situation, education, smoking status and 3 month costs prior to baseline between the two groups. INTERVENTION: The CCFE is an integrated care programme with unique features like the presence of the elderly and informal caregiver at the multidisciplinary team meetings, and a bundled payment. PRIMARY AND SECONDARY OUTCOMES MEASURES: The MCDA results in weighted overall value scores that combines the performance on physical functioning, psychological well-being, social relationships and participation, enjoyment of life, resilience, person-centredness, continuity of care and costs, with importance weights of patients, informal caregivers, professionals, payers and policy-makers. RESULTS: At 6 months, the overall value scores of CCFE were higher in all stakeholder groups, driven by enjoyment of life (standardised performance scores 0.729 vs 0.685) and person-centredness (0.749 vs 0.663). At 12 months, the overall value scores in both groups were similar from a patient's perspective, slightly higher for CCFE from an informal caregiver's and professional's perspective, and lower for CCFE from a payer's and policy-maker's perspective. The latter was driven by a worse performance on physical functioning (0.682 vs 0.731) and higher costs (€22 816 vs €20 680). CONCLUSIONS: The MCDA indicated that the CCFE is the preferred way of delivering care to frail elderly at 6 months. However, at 12 months, MCDA results showed little difference from the perspective of patients, informal caregivers and professionals, while payers and policy-makers seemed to prefer usual care.


Subject(s)
Delivery of Health Care, Integrated , Frail Elderly , Aged , Caregivers/psychology , Decision Support Techniques , Delivery of Health Care, Integrated/methods , Frail Elderly/psychology , Humans , Independent Living
2.
Value Health ; 24(7): 966-975, 2021 07.
Article in English | MEDLINE | ID: mdl-34243840

ABSTRACT

OBJECTIVES: Multi-criteria decision analysis (MCDA) has been recommended to support policy making in healthcare. However, practical applications of MCDA are sparse. One potential use for MCDA is for the evaluation of programs for complex and vulnerable patients. These complex patients benefit from integrated care programs that span healthcare and social care and aim to improve more than just health outcomes. MCDA can evaluate programs that aim to improve broader outcomes because it allows the evaluation of multiple outcomes alongside each other. In this study, we evaluate an innovative integrated care program in the Netherlands using MCDA. METHODS: We used an innovative MCDA framework with broad outcomes of health, well-being, and cost to evaluate the Better Together in Amsterdam North (BSiN) program using preferences of patients, partners, providers, payers, and policy makers in the Netherlands. BSiN provides case management support for a period of 6 months. Seven outcomes that previous research has deemed important to complex patients were measured, including physical functioning and social relationships and participation. RESULTS: We find that the program improved the overall MCDA score marginally, and, thus, after 6 and after 12 months, BSiN was preferred to usual care by all stakeholders. BSiN was preferred to usual care, mostly owing to improvements in psychological well-being and social relationships and participation. CONCLUSIONS: The integrated healthcare and social care program BSiN in the Netherlands was preferred to usual care according to an MCDA evaluation. MCDA seems a useful method to evaluate complex programs with benefits beyond health.


Subject(s)
Decision Support Techniques , Policy Making , Social Support , Choice Behavior , Delivery of Health Care , Humans , Netherlands , Technology Assessment, Biomedical
3.
BMJ Open ; 10(10): e037547, 2020 10 10.
Article in English | MEDLINE | ID: mdl-33039997

ABSTRACT

OBJECTIVES: To measure relative preferences for outcomes of integrated care of patients with multimorbidity from eight European countries and compare them to the preferences of other stakeholders within these countries. DESIGN: A discrete choice experiment (DCE) was conducted in each country, asking respondents to choose between two integrated care programmes for persons with multimorbidity. SETTING: Preference data collected in Austria (AT), Croatia (HR), Germany (DE), Hungary (HU), the Netherlands (NL), Norway (NO), Spain (ES), and UK. PARTICIPANTS: Patients with multimorbidity, partners and other informal caregivers, professionals, payers and policymakers. MAIN OUTCOME MEASURES: Preferences of participants regarding outcomes of integrated care described as health/well-being, experience with care and cost outcomes, that is, physical functioning, psychological well-being, social relationships and participation, enjoyment of life, resilience, person-centredness, continuity of care and total costs. Each outcome had three levels of performance. RESULTS: 5122 respondents completed the DCE. In all countries, patients with multimorbidity, as well as most other stakeholder groups, assigned the (second) highest preference to enjoyment of life. The patients top-three most frequently included physical functioning, psychological well-being and continuity of care. Continuity of care also entered the top-three of professionals, payers and policymakers in four countries (AT, DE, HR and HU). Of the five stakeholder groups, preferences of professionals differed most often from preferences of patients. Professionals assigned lower weights to physical functioning in AT, DE, ES, NL and NO and higher weights to person-centredness in AT, DE, ES and HU. Payers and policymakers assigned higher weights than patients to costs, but these weights were relatively low. CONCLUSION: The well-being outcome enjoyment of life is the most important outcome of integrated care in multimorbidity. This calls for a greater involvement of social and mental care providers. The difference in opinion between patients and professionals calls for shared decision-making, whereby efforts to improve well-being and person-centredness should not divert attention from improving physical functioning.


Subject(s)
Delivery of Health Care, Integrated , Multimorbidity , Austria , Croatia , Europe , Humans , Hungary , Netherlands , Norway , Spain
4.
BMC Health Serv Res ; 19(1): 370, 2019 Jun 11.
Article in English | MEDLINE | ID: mdl-31185997

ABSTRACT

BACKGROUND: Comprehensive assessment of integrated care deployment constitutes a major challenge to ensure quality, sustainability and transferability of both healthcare policies and services in the transition toward a coordinated service delivery scenario. To this end, the manuscript articulates four different protocols aiming at assessing large-scale implementation of integrated care, which are being developed within the umbrella of the regional project Nextcare (2016-2019), undertaken to foster innovation in technologically-supported services for chronic multimorbid patients in Catalonia (ES) (7.5 M inhabitants). Whereas one of the assessment protocols is designed to evaluate population-based deployment of care coordination at regional level during the period 2011-2017, the other three are service-based protocols addressing: i) Home hospitalization; ii) Prehabilitation for major surgery; and, iii) Community-based interventions for frail elderly chronic patients. All three services have demonstrated efficacy and potential for health value generation. They reflect different implementation maturity levels. While full coverage of the entire urban health district of Barcelona-Esquerra (520 k inhabitants) is the main aim of home hospitalization, demonstration of sustainability at Hospital Clinic of Barcelona constitutes the core goal of the prehabilitation service. Likewise, full coverage of integrated care services addressed to frail chronic patients is aimed at the city of Badalona (216 k inhabitants). METHODS: The population-based analysis, as well as the three service-based protocols, follow observational and experimental study designs using a non-randomized intervention group (integrated care) compared with a control group (usual care) with a propensity score matching method. Evaluation of cost-effectiveness of the interventions using a Quadruple aim approach is a central outcome in all protocols. Moreover, multi-criteria decision analysis is explored as an innovative method for health delivery assessment. The following additional dimensions will also be addressed: i) Determinants of sustainability and scalability of the services; ii) Assessment of the technological support; iii) Enhanced health risk assessment; and, iv) Factors modulating service transferability. DISCUSSION: The current study offers a unique opportunity to undertake a comprehensive assessment of integrated care fostering deployment of services at regional level. The study outcomes will contribute refining service workflows, improving health risk assessment and generating recommendations for service selection. TRIALS REGISTRATION: NCT03130283 (date released 04/06/2018), NCT03768050 (date released 12/05/2018), NCT03767387 (date released 12/05/2018).


Subject(s)
Cost-Benefit Analysis/standards , Delivery of Health Care, Integrated/standards , Aged , Clinical Protocols , Delivery of Health Care, Integrated/economics , Female , Health Services Research , Humans , Male , Observational Studies as Topic , Outcome Assessment, Health Care , Spain
5.
BMC Health Serv Res ; 18(1): 576, 2018 07 24.
Article in English | MEDLINE | ID: mdl-30041653

ABSTRACT

BACKGROUND: Evaluation of integrated care programmes for individuals with multi-morbidity requires a broader evaluation framework and a broader definition of added value than is common in cost-utility analysis. This is possible through the use of Multi-Criteria Decision Analysis (MCDA). METHODS AND RESULTS: This paper presents the seven steps of an MCDA to evaluate 17 different integrated care programmes for individuals with multi-morbidity in 8 European countries participating in the 4-year, EU-funded SELFIE project. In step one, qualitative research was undertaken to better understand the decision-context of these programmes. The programmes faced decisions related to their sustainability in terms of reimbursement, continuation, extension, and/or wider implementation. In step two, a uniform set of decision criteria was defined in terms of outcomes measured across the 17 programmes: physical functioning, psychological well-being, social relationships and participation, enjoyment of life, resilience, person-centeredness, continuity of care, and total health and social care costs. These were supplemented by programme-type specific outcomes. Step three presents the quasi-experimental studies designed to measure the performance of the programmes on the decision criteria. Step four gives details of the methods (Discrete Choice Experiment, Swing Weighting) to determine the relative importance of the decision criteria among five stakeholder groups per country. An example in step five illustrates the value-based method of MCDA by which the performance of the programmes on each decision criterion is combined with the weight of the respective criterion to derive an overall value score. Step six describes how we deal with uncertainty and introduces the Conditional Multi-Attribute Acceptability Curve. Step seven addresses the interpretation of results in stakeholder workshops. DISCUSSION: By discussing our solutions to the challenges involved in creating a uniform MCDA approach for the evaluation of different programmes, this paper provides guidance to future evaluations and stimulates debate on how to evaluate integrated care for multi-morbidity.


Subject(s)
Delivery of Health Care, Integrated/standards , Multiple Chronic Conditions/therapy , Cost-Benefit Analysis , Decision Making , Decision Support Techniques , Europe , Evidence-Based Medicine , Humans , Program Evaluation , Uncertainty
6.
J Glob Health ; 8(2): 020601, 2018 12.
Article in English | MEDLINE | ID: mdl-30023054

ABSTRACT

BACKGROUND: The role of community health workers (CHWs) in the West Africa Ebola outbreak has been highlighted to advocate for increasing numbers of CHWs globally to build resilience, strengthen health systems, and provide emergency response capacity. However, the roles CHWs played, the challenges they faced, and their effectiveness during the outbreak are not well documented. This study assessed the impact of Ebola on community-based maternal, newborn, and child health (MNCH) services, documented the contribution of CHWs and other community-based actors to the Ebola response, and identified lessons learned to strengthen resilience in future emergencies. METHODS: This mixed methods study was conducted in Guinea, Liberia, and Sierra Leone, with data collected in four Ebola-affected districts of each country. Qualitative data were collected through in-depth interviews and focus group discussions with stakeholders at national, district, and community levels. Quantitative program data were used to assess trends in delivery of community-based MNCH services. RESULTS: There was a sharp decline in MNCH service provision due to weak service delivery, confusion over policy, and the overwhelming nature of the outbreak. However, many CHWs remained active in their communities and were willing to continue providing services. When CHWs received clear directives and were supported, service provision rebounded. Although CHWs faced mistrust and hostility from community members because of their linkages to health facilities, the relationship between CHWs and communities proved resilient over time, and CHWs were more effectively able to carry out Ebola-related activities than outsiders. Traditional birth attendants, community health committees, community leaders, and traditional healers also played important roles, despite a lack of formal engagement or support. Service delivery weaknesses, especially related to supply chain and supervision, limited the effectiveness of community health services before, during, and after the outbreak. CONCLUSIONS: CHWs and other community-level actors played important roles during the Ebola outbreak. However, maintenance of primary care services and the Ebola response were hampered because community actors were engaged late in the response and did not receive sufficient support. In the future, communities should be placed at the forefront of emergency preparedness and response plans and they must be adequately supported to strengthen service delivery.


Subject(s)
Community Health Workers , Disease Outbreaks/prevention & control , Hemorrhagic Fever, Ebola/epidemiology , Hemorrhagic Fever, Ebola/prevention & control , Maternal-Child Health Services/organization & administration , Child, Preschool , Female , Focus Groups , Guinea/epidemiology , Humans , Infant , Infant, Newborn , Liberia/epidemiology , Pregnancy , Professional Role , Qualitative Research , Sierra Leone/epidemiology
7.
J Steroid Biochem Mol Biol ; 175: 138-145, 2018 01.
Article in English | MEDLINE | ID: mdl-28161533

ABSTRACT

Vitamin D deficiency is common in patients with chronic obstructive pulmonary disease (COPD), yet a comprehensive analysis of environmental and genetic determinants of serum 25-hydroxyvitamin D (25[OH]D) concentration in patients with this condition is lacking. We conducted a multi-centre cross-sectional study in 278 COPD patients aged 41-92 years in London, UK. Details of potential environmental determinants of vitamin D status and COPD symptom control and severity were collected by questionnaire, and blood samples were taken for analysis of serum 25(OH)D concentration and DNA extraction. All participants performed spirometry and underwent measurement of weight and height. Quadriceps muscle strength (QS) was measured in 134 participants, and sputum induction with enumeration of lower airway eosinophil and neutrophil counts was performed for 44 participants. Thirty-seven single nucleotide polymorphisms (SNP) in 11 genes in the vitamin D pathway (DBP, DHCR7, CYP2R1, CYP27B1, CYP24A1, CYP27A1, CYP3A4, LRP2, CUBN, RXRA, and VDR) were typed using Taqman allelic discrimination assays. Linear regression was used to identify environmental and genetic factors independently associated with serum 25(OH)D concentration and to determine whether vitamin D status or genetic factors independently associated with % predicted forced expiratory volume in one second (FEV1), % predicted forced vital capacity (FVC), the ratio of FEV1 to FVC (FEV1:FVC), daily inhaled corticosteroid (ICS) dose, respiratory quality of life (QoL), QS, and the percentage of eosinophils and neutrophils in induced sputum. Mean serum 25(OH)D concentration was 45.4nmol/L (SD 25.3); 171/278 (61.5%) participants were vitamin D deficient (serum 25[OH]D concentration <50nmol/L). Lower vitamin D status was independently associated with higher body mass index (P=0.001), lower socio-economic position (P=0.037), lack of vitamin D supplement consumption (P<0.001), sampling in Winter or Spring (P for trend=0.006) and lack of a recent sunny holiday (P=0.002). Vitamin D deficiency associated with reduced % predicted FEV1 (P for trend=0.060) and % predicted FVC (P for trend=0.003), but it did not associate with FEV1:FVC, ICS dose, QoL, QS, or the percentage of eosinophils or neutrophils in induced sputum. After correction for multiple comparisons testing, genetic variation in the vitamin D pathway was not found to associate with serum 25(OH)D concentration or clinical correlates of COPD severity. Vitamin D deficiency was common in this group of COPD patients in the UK, and it associated independently with reduced % predicted FEV1 and FVC. However, genetic variation in the vitamin D pathway was not associated with vitamin D status or severity of COPD.


Subject(s)
Pulmonary Disease, Chronic Obstructive/epidemiology , Vitamin D Deficiency/epidemiology , Vitamin D/analogs & derivatives , Adult , Aged , Aged, 80 and over , Body Mass Index , Cross-Sectional Studies , Cytochrome P-450 Enzyme System/blood , Cytochrome P-450 Enzyme System/genetics , DNA-Binding Proteins/blood , DNA-Binding Proteins/genetics , Eosinophils/metabolism , Eosinophils/pathology , Female , Gene Expression Regulation , Humans , London/epidemiology , Low Density Lipoprotein Receptor-Related Protein-2/blood , Low Density Lipoprotein Receptor-Related Protein-2/genetics , Male , Middle Aged , Neutrophils/metabolism , Neutrophils/pathology , Oxidoreductases Acting on CH-CH Group Donors/blood , Oxidoreductases Acting on CH-CH Group Donors/genetics , Prevalence , Pulmonary Disease, Chronic Obstructive/blood , Pulmonary Disease, Chronic Obstructive/complications , Pulmonary Disease, Chronic Obstructive/genetics , Racial Groups , Receptors, Calcitriol/blood , Receptors, Calcitriol/genetics , Receptors, Cell Surface/blood , Receptors, Cell Surface/genetics , Respiratory Function Tests , Severity of Illness Index , Transcription Factors/blood , Transcription Factors/genetics , Vitamin D/blood , Vitamin D Deficiency/blood , Vitamin D Deficiency/complications , Vitamin D Deficiency/genetics
8.
Biol Res ; 48: 65, 2015 Nov 18.
Article in English | MEDLINE | ID: mdl-26581452

ABSTRACT

BACKGROUND: Tridax procumbens flavonoids (TPFs) are well known for their medicinal properties among local natives. Besides traditionally used for dropsy, anemia, arthritis, gout, asthma, ulcer, piles, and urinary problems, it is also used in treating gastric problems, body pain, and rheumatic pains of joints. TPFs have been reported to increase osteogenic functioning in mesenchymal stem cells. Our previous study showed that TPFs were significantly suppressed the RANKL-induced differentiation of osteoclasts and bone resorption. However, the effects of TPFs to promote osteoblasts differentiation and bone formation remain unclear. TPFs were isolated from Tridax procumbens and investigated for their effects on osteoblasts differentiation and bone formation by using primary mouse calvarial osteoblasts. RESULTS: TPFs promoted osteoblast differentiation in a dose-dependent manner demonstrated by up-regulation of alkaline phosphatase and osteocalcin. TPFs also upregulated osteoblast differentiation related genes, including osteocalcin, osterix, and Runx2 in primary osteoblasts. TPFs treated primary osteoblast cells showed significant upregulation of bone morphogenetic proteins (BMPs) including Bmp-2, Bmp-4, and Bmp-7. Addition of noggin, a BMP specific-antagonist, inhibited TPFs induced upregulation of the osteocalcin, osterix, and Runx2. CONCLUSION: Our findings point towards the induction of osteoblast differentiation by TPFs and suggested that TPFs could be a potential anabolic agent to treat patients with bone loss-associated diseases such as osteoporosis.


Subject(s)
Asteraceae/chemistry , Cell Differentiation/drug effects , Flavonoids/pharmacology , Osteoblasts/drug effects , Osteogenesis/drug effects , Alkaline Phosphatase/drug effects , Alkaline Phosphatase/metabolism , Animals , Bone Morphogenetic Proteins/metabolism , Calcification, Physiologic/drug effects , Core Binding Factor Alpha 1 Subunit/genetics , Core Binding Factor Alpha 1 Subunit/metabolism , Flavonoids/analysis , Medicine, Traditional , Mice, Inbred C57BL , Osteoblasts/cytology , Osteoblasts/metabolism , Osteocalcin/drug effects , Osteocalcin/genetics , Primary Cell Culture , Reverse Transcriptase Polymerase Chain Reaction , Skull/cytology , Skull/drug effects , Sp7 Transcription Factor , Transcription Factors/genetics , Up-Regulation/genetics
9.
Lancet Respir Med ; 3(2): 120-130, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25476069

ABSTRACT

BACKGROUND: Patients with chronic obstructive pulmonary disease (COPD) often have vitamin D deficiency, which is associated with increased susceptibility to upper respiratory infection-a major precipitant of exacerbation. Multicentre trials of vitamin D supplementation for prevention of exacerbation and upper respiratory infection in patients with COPD are lacking. We therefore investigated whether vitamin D3 (colecalciferol) supplementation would reduce the incidence of moderate or severe COPD exacerbations and upper respiratory infections. METHODS: We did a randomised, double-blind, placebo-controlled trial of vitamin D3 supplementation in adults with COPD in 60 general practices and four Acute National Health Service Trust clinics in London, UK. Patients were allocated to receive six 2-monthly oral doses of 3 mg vitamin D3 or placebo over 1 year in a 1:1 ratio using computer-generated permuted block randomisation. Participants and study staff were masked to treatment assignment. Coprimary outcomes were time to first moderate or severe exacerbation and first upper respiratory infection. Analysis was by intention to treat. A prespecified subgroup analysis was done to assess whether effects of the intervention on the coprimary outcomes were modified by baseline vitamin D status. This trial is registered with ClinicalTrials.gov, number NCT00977873. FINDINGS: 240 patients were randomly allocated to the vitamin D3 group (n=122) and placebo group (n=118). Vitamin D3 compared with placebo did not affect time to first moderate or severe exacerbation (adjusted hazard ratio 0·86, 95% CI 0·60-1·24, p=0·42) or time to first upper respiratory infection (0·95, 0·69-1·31, p=0·75). Prespecified subgroup analysis showed that vitamin D3 was protective against moderate or severe exacerbation in participants with baseline serum 25-hydroxyvitamin D concentrations of less than 50 nmol/L (0·57, 0·35-0·92, p=0·021), but not in those with baseline 25-hydroxyvitamin D levels of at least 50 nmol/L (1·45, 0·81-2·62, p=0·21; p=0·021 for interaction between allocation and baseline serum 25-hydroxyvitamin D status). Baseline vitamin D status did not modify the effect of the intervention on risk of upper respiratory infection (pinteraction=0·41). INTERPRETATION: Vitamin D3 supplementation protected against moderate or severe exacerbation, but not upper respiratory infection, in patients with COPD with baseline 25-hydroxyvitamin D levels of less than 50 nmol/L. Our findings suggest that correction of vitamin D deficiency in patients with COPD reduces the risk of moderate or severe exacerbation. FUNDING: UK National Institute for Health Research.


Subject(s)
Cholecalciferol/therapeutic use , Dietary Supplements , Pulmonary Disease, Chronic Obstructive/diet therapy , Vitamins/therapeutic use , Aged , Double-Blind Method , Female , Humans , Male , Middle Aged , Pulmonary Disease, Chronic Obstructive/blood , Pulmonary Disease, Chronic Obstructive/complications , Respiratory Tract Infections/epidemiology , Respiratory Tract Infections/etiology , Vitamin D/analogs & derivatives , Vitamin D/blood , Vitamin D Deficiency/blood , Vitamin D Deficiency/complications , Vitamin D Deficiency/diet therapy
10.
Biol. Res ; 48: 1-8, 2015. graf, tab
Article in English | LILACS | ID: biblio-950829

ABSTRACT

BACKGROUND: Tridaxprocumbens flavonoids (TPFs) are well known for their medicinal properties among local natives. Besides traditionally used for dropsy, anemia, arthritis, gout, asthma, ulcer, piles, and urinary problems, it is also used in treating gastric problems, body pain, and rheumatic pains of joints. TPFs have been reported to increase osteogenic functioning in mesenchymal stem cells. Our previous study showed that TPFs were significantly suppressed the RANKL-induced differentiation of osteoclasts and bone resorption. However, the effects of TPFs to promote osteoblasts differentiation and bone formation remain unclear. TPFs were isolated from Tridax procumbens and investigated for their effects on osteoblasts differentiation and bone formation by using primary mouse calvarial osteoblasts. RESULTS: TPFs promoted osteoblast differentiation in a dose-dependent manner demonstrated by up-regulation of alkaline phosphatase and osteocalcin. TPFs also upregulated osteoblast differentiation related genes, including osteocalcin, osterix, and Runx2 in primary osteoblasts. TPFs treated primary osteoblast cells showed significant upregulation of bone morphogenetic proteins (BMPs) including Bmp-2, Bmp-4, and Bmp-7. Addition of noggin, a BMP specific-antagonist, inhibited TPFs induced upregulation of the osteocalcin, osterix, and Runx2. CONCLUSION: Our findings point towards the induction of osteoblast differentiation by TPFs and suggested that TPFs could be a potential anabolic agent to treat patients with bone loss-associated diseases such as osteoporosis.


Subject(s)
Animals , Mice , Osteoblasts/drug effects , Osteogenesis/drug effects , Flavonoids/pharmacology , Cell Differentiation/drug effects , Asteraceae/chemistry , Osteoblasts/cytology , Osteoblasts/metabolism , Skull/cytology , Skull/drug effects , Transcription Factors/genetics , Flavonoids/analysis , Calcification, Physiologic/drug effects , Osteocalcin/drug effects , Osteocalcin/genetics , Up-Regulation/genetics , Bone Morphogenetic Proteins/metabolism , Reverse Transcriptase Polymerase Chain Reaction , Alkaline Phosphatase/drug effects , Alkaline Phosphatase/metabolism , Core Binding Factor Alpha 1 Subunit/genetics , Core Binding Factor Alpha 1 Subunit/metabolism , Primary Cell Culture , Sp7 Transcription Factor , Medicine, Traditional , Mice, Inbred C57BL
11.
Proc Natl Acad Sci U S A ; 109(38): 15449-54, 2012 Sep 18.
Article in English | MEDLINE | ID: mdl-22949664

ABSTRACT

Calcidiol, the major circulating metabolite of vitamin D, supports induction of pleiotropic antimicrobial responses in vitro. Vitamin D supplementation elevates circulating calcidiol concentrations, and thus has a potential role in the prevention and treatment of infection. The immunomodulatory effects of administering vitamin D to humans with an infectious disease have not previously been reported. To characterize these effects, we conducted a detailed longitudinal study of circulating and antigen-stimulated immune responses in ninety-five patients receiving antimicrobial therapy for pulmonary tuberculosis who were randomized to receive adjunctive high-dose vitamin D or placebo in a clinical trial, and who fulfilled criteria for per-protocol analysis. Vitamin D supplementation accelerated sputum smear conversion and enhanced treatment-induced resolution of lymphopaenia, monocytosis, hypercytokinaemia, and hyperchemokinaemia. Administration of vitamin D also suppressed antigen-stimulated proinflammatory cytokine responses, but attenuated the suppressive effect of antimicrobial therapy on antigen-stimulated secretion of IL-4, CC chemokine ligand 5, and IFN-α. We demonstrate a previously unappreciated role for vitamin D supplementation in accelerating resolution of inflammatory responses during tuberculosis treatment. Our findings suggest a potential role for adjunctive vitamin D supplementation in the treatment of pulmonary infections to accelerate resolution of inflammatory responses associated with increased risk of mortality.


Subject(s)
Tuberculosis/immunology , Vitamin D/metabolism , Adult , Antimicrobial Cationic Peptides/pharmacology , Antitubercular Agents/pharmacology , Female , Gene Expression Regulation , Genotype , Humans , Immune System , Inflammation , Kinetics , Male , Middle Aged , Polymorphism, Genetic , Regression Analysis , Risk , Steroids/chemistry , Time Factors , Tuberculosis/therapy , Vitamin D/therapeutic use
12.
Lancet ; 377(9761): 242-50, 2011 Jan 15.
Article in English | MEDLINE | ID: mdl-21215445

ABSTRACT

BACKGROUND: Vitamin D was used to treat tuberculosis in the pre-antibiotic era, and its metabolites induce antimycobacterial immunity in vitro. Clinical trials investigating the effect of adjunctive vitamin D on sputum culture conversion are absent. METHODS: We undertook a multicentre randomised controlled trial of adjunctive vitamin D in adults with sputum smear-positive pulmonary tuberculosis in London, UK. 146 patients were allocated to receive 2·5 mg vitamin D(3) or placebo at baseline and 14, 28, and 42 days after starting standard tuberculosis treatment. The primary endpoint was time from initiation of antimicrobial treatment to sputum culture conversion. Patients were genotyped for TaqI and FokI polymorphisms of the vitamin D receptor, and interaction analyses were done to assess the influence of the vitamin D receptor genotype on response to vitamin D(3). This trial is registered with ClinicalTrials.gov number NCT00419068. FINDINGS: 126 patients were included in the primary efficacy analysis (62 assigned to intervention, 64 assigned to placebo). Median time to sputum culture conversion was 36·0 days in the intervention group and 43·5 days in the placebo group (adjusted hazard ratio 1·39, 95% CI 0·90-2·16; p=0.14). TaqI genotype modified the effect of vitamin D supplementation on time to sputum culture conversion (p(interaction)=0·03), with enhanced response seen only in patients with the tt genotype (8·09, 95% CI 1·36-48·01; p=0·02). FokI genotype did not modify the effect of vitamin D supplementation (p(interaction)=0·85). Mean serum 25-hydroxyvitamin D concentration at 56 days was 101·4 nmol/L in the intervention group and 22·8 nmol/L in the placebo group (95% CI for difference 68·6-88·2; p<0·0001). INTERPRETATION: Administration of four doses of 2·5 mg vitamin D(3) increased serum 25-hydroxyvitamin D concentrations in patients receiving intensive-phase treatment for pulmonary tuberculosis. Vitamin D did not significantly affect time to sputum culture conversion in the whole study population, but it did significantly hasten sputum culture conversion in participants with the tt genotype of the TaqI vitamin D receptor polymorphism. FUNDING: British Lung Foundation.


Subject(s)
Antitubercular Agents/therapeutic use , Cholecalciferol/administration & dosage , Tuberculosis, Pulmonary/drug therapy , Vitamins/administration & dosage , Adult , Double-Blind Method , Female , Humans , Male , Polymorphism, Genetic , Receptors, Calcitriol/genetics , Sputum/microbiology , Taq Polymerase/genetics , Young Adult
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