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Farmer A, Bobrow K, Leon N, Williams N, Phiri E, Namadingo H, Cooper S, Prince J, Crampin A, Besada D, Daviaud E, Yu LM, N'goma J, Springer D, Pauly B, Tarassenko L, Norris S, Nyirenda M, Levitt N. Correction to: Digital messaging to support control for type 2 diabetes (StAR2D): a multicentre randomised controlled trial. BMC Public Health 2022; 22:710. [PMID: 35413890 PMCID: PMC9006479 DOI: 10.1186/s12889-022-13085-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- A Farmer
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.
| | - K Bobrow
- Chronic Disease Initiative for Africa, University of Cape Town, Cape Town, South Africa
| | - N Leon
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - N Williams
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - E Phiri
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - H Namadingo
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - S Cooper
- Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa
| | - J Prince
- Institute of Biomedical Engineering, Oxford, UK
| | - A Crampin
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - D Besada
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - E Daviaud
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - L-M Yu
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - J N'goma
- Kamuzu Central Hospital, Lilongwe, Malawi
| | | | - B Pauly
- Department of Diabetes and Endocrinology, Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa
| | | | - S Norris
- Human Nutrition Unit, South African Medical Research Council, Johannesberg, South Africa
| | - M Nyirenda
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - N Levitt
- Chronic Disease Initiative for Africa, University of Cape Town, Cape Town, South Africa
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Farmer A, Bobrow K, Leon N, Williams N, Phiri E, Namadingo H, Cooper S, Prince J, Crampin A, Besada D, Daviaud E, Yu LM, N'goma J, Springer D, Pauly B, Tarassenko L, Norris S, Nyirenda M, Levitt N. Digital messaging to support control for type 2 diabetes (StAR2D): a multicentre randomised controlled trial. BMC Public Health 2021; 21:1907. [PMID: 34674688 PMCID: PMC8529732 DOI: 10.1186/s12889-021-11874-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 09/28/2021] [Indexed: 11/10/2022] Open
Abstract
Background Failure to take medicines for diabetes as prescribed contributes to poor outcomes from the condition. Mobile phones are ubiquitous and short message service (SMS) texts have shown promise as a low-cost intervention. We tested the effectiveness of SMS-text messaging in improving outcomes in adults with type 2 diabetes. Methods StAR2D was a 12-month two-arm randomised trial of SMS-text messaging and usual care in Cape Town, South Africa and Lilongwe, Malawi. Messages used behaviour change theory and were developed with patients and staff. The intervention group received four messages each week. The primary outcome was change in HbA1c. Secondary outcomes were the proportion of patients who collected > 80% medication and changes in systolic blood pressure, lipids, cardiovascular risk, and the proportion of the participants reaching treatment goals. Results The trial took place between 1 October, 2016 and 1 October 2018, 1186 participants were randomised to intervention (593) and control (593) groups. 91% of participants completed follow-up. There was a reduction in HbA1c (DCCT) in both groups but not in mean change (95% CI) between groups (− 0.08% (− 0.31 to 0.16) (IFCC − 0.82 mmol/mol (− 3.44 to 1.79). There was a small but not significant increase in the proportions of participants likely to have collected 80% or more of medication (Relative risk 1.11 (0.84 to 1.47; P = 0.47). There was a significant difference between groups in change in systolic blood pressure from baseline of 3.46 mmHg (1.48 to 5.44, P = 0.001) in favour of the intervention group. The between group difference in change in 10-year risk of coronary heart disease was − 0.71% (− 1.46 to 0.04, P = 0.064). The proportion of participants meeting treatment goals in the intervention group was 36.0% and in the control group 26.8% (Relative risk 1.36 (1.13 to 1.63, P = 0.001). Participants reported many challenges to adherence despite finding messages acceptable and useful. Conclusions Whilst SMS text messages do not lead to improved glycaemia in these low-resource settings there appeared to be an impact on blood pressure and achievement of treatment goals but the mechanisms for this are unclear. Text messages alone, may be unsuccessful unless accompanied by health system strengthening and other forms of self-management support for type 2 diabetes. Trial registration Trial registration: ISRCTN, ISRCTN70768808. Registered 1 July 2015, http://www.isrctn.com/I ISRCTN70768808. Supplementary Information The online version contains supplementary material available at 10.1186/s12889-021-11874-7.
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Affiliation(s)
- A Farmer
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.
| | - K Bobrow
- Chronic Disease Initiative for Africa, University of Cape Town, Cape Town, South Africa
| | - N Leon
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - N Williams
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - E Phiri
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - H Namadingo
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - S Cooper
- Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa
| | - J Prince
- Institute of Biomedical Engineering, Oxford, UK
| | - A Crampin
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - D Besada
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - E Daviaud
- Health Systems Research Unit, South-African Medical Research Council, Cape Town, South Africa
| | - L-M Yu
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - J N'goma
- Kamuzu Central Hospital, Lilongwe, Malawi
| | | | - B Pauly
- Department of Diabetes and Endocrinology, Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa
| | | | - S Norris
- Human Nutrition Unit, South African Medical Research Council, Johannesberg, South Africa
| | - M Nyirenda
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - N Levitt
- Chronic Disease Initiative for Africa, University of Cape Town, Cape Town, South Africa
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Opollo V, Sun X, Lando R, Miyahara S, Torres TS, Hosseinipour MC, Bisson GP, Kumwenda J, Gupta A, Nyirenda M, Katende K, Suryavanshi N, Beulah F, Shah NS. The effect of TB treatment on health-related quality of life for people with advanced HIV. Int J Tuberc Lung Dis 2021; 24:910-915. [PMID: 33156757 DOI: 10.5588/ijtld.19.0716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND: Study A5274 was an open-label trial of people with HIV (PLHIV) with CD4 cell count <50 cells/µL who were randomized to empirical TB treatment vs. isoniazid preventive therapy (IPT) in addition to antiretroviral therapy (ART). We evaluated health-related quality of life (HRQoL) by study arm, changes over time, and association with sociodemographic and clinical factors.METHODS: Participants aged >13 years were enrolled from outpatient clinics in 10 countries. HRQoL was assessed at Weeks 0, 8, 24 and 96 with questions about daily activity, hospital or emergency room visits, and general health status. We used logistic regression to examine HRQoL by arm and association with sociodemographic and clinical factors.RESULTS: Among 850 participants (424 empiric arm, 426 IPT arm), HRQoL improved over time with no difference between arms. At baseline and Week 24, participants with WHO Stage 3 or 4 events, or those who had Grade 3 or 4 signs/symptoms, were significantly more likely to report poor HRQoL using the composite of four HRQoL measures.CONCLUSION: HRQoL improved substantially in both arms during the study period. These findings show that ART, TB screening, and IPT can not only reduce mortality, but also improve HRQoL in PLHIV with advanced disease.
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Affiliation(s)
- V Opollo
- Kenya Medical Research Institute, HIV-Research Branch, Kisumu, Kenya
| | - X Sun
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - R Lando
- Kenya Medical Research Institute, HIV-Research Branch, Kisumu, Kenya
| | - S Miyahara
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - T S Torres
- Instituto Nacional de Infectologia Evandro Chagas (INI-FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - M C Hosseinipour
- University of North Carolina School of Medicine, Chapel Hill, NC, USA, University of North Carolina Project, Lilongwe, Malawi
| | - G P Bisson
- Perlman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | | | - A Gupta
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - K Katende
- Joint Clinical Research Centre Clinical Research Site, Kampala, Uganda
| | - N Suryavanshi
- Byramjee Jeejeebhoy Government Medical College Clinical Trials Unit, Pune, India
| | - F Beulah
- YR Gaitonde Centre for AIDS Research and Education, Chennai Antiviral Research and Treatment Clinical Research Site, Chennai, India
| | - N S Shah
- Centers for Disease Control and Prevention, Atlanta, GA, USA
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Morton B, Barnes KG, Anscombe C, Jere K, Kamng'ona R, Brown C, Nyirenda J, Phiri T, Banda N, Van Der Veer C, Mndolo KS, Mponda K, Rylance J, Phiri C, Mallewa J, Nyirenda M, Katha G, Kambiya P, Jafali J, Mwandumba HC, Gordon SB, Cornick J, Jambo KC. In depth analysis of patients with severe SARS-CoV-2 in sub-Saharan Africa demonstrates distinct clinical and immunological profiles. medRxiv 2021:2021.02.15.21251753. [PMID: 33619502 PMCID: PMC7899472 DOI: 10.1101/2021.02.15.21251753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Although the COVID-19 pandemic has left no country untouched there has been limited research to understand clinical and immunological responses in African populations. Here we comprehensively characterise patients hospitalised with suspected or confirmed COVID-19, and healthy community controls. PCR-confirmed COVID-19 participants were more likely to receive dexamethasone and a beta-lactam antibiotic, and survive to hospital discharge than PCR-/IgG+ and PCR-/IgG-participants. PCR-/IgG+ participants exhibited a nasal and systemic cytokine signature analogous to PCR-confirmed COVID-19 participants, but increased propensity for Staphylococcus aureus and Streptococcus pneumoniae colonisation. We did not find evidence that HIV co-infection in COVID-19 participants was associated with mortality or altered cytokine responses. The nasal immune signature in PCR-/IgG+ and PCR-confirmed COVID-19 participants was distinct and predominated by chemokines and neutrophils. In addition, PCR-/IgG+ individuals with high COVID-19 clinical suspicion had inflammatory profiles analogous to PCR-confirmed disease and potentially represent a target population for COVID-19 treatment strategies.
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Affiliation(s)
- B Morton
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
| | - K G Barnes
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
- Harvard School of Public Health, Boston, USA
- Broad Institute of MIT and Harvard, Cambridge, USA
- University of Glasgow MRC Centre for Virus Research, Glasgow, UK
| | - C Anscombe
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - K Jere
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
- University of Malawi-College of Medicine, Blantyre, Malawi
| | - R Kamng'ona
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
| | - C Brown
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
| | - J Nyirenda
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
| | - T Phiri
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - N Banda
- University of Malawi-College of Medicine, Blantyre, Malawi
| | - C Van Der Veer
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - K S Mndolo
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - K Mponda
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - J Rylance
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - C Phiri
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - J Mallewa
- University of Malawi-College of Medicine, Blantyre, Malawi
| | - M Nyirenda
- University of Malawi-College of Medicine, Blantyre, Malawi
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - G Katha
- Department of Medicine, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - P Kambiya
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
| | - J Jafali
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
| | - H C Mwandumba
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- University of Malawi-College of Medicine, Blantyre, Malawi
| | - S B Gordon
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - J Cornick
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - K C Jambo
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- University of Malawi-College of Medicine, Blantyre, Malawi
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Nyirenda M, Mcinnes I, Goodyear C. THU0039 DECIPHERING DISEASE-RELEVANT T CELL SUBSETS IN RHEUMATOID ARTHRITIS IDENTIFIES A NOVEL CELLULAR SUBSET OF PATHOGENETIC IMPORTANCE IN THERAPEUTIC RESISTANCE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Aberrant T cell responses are key in driving autoimmunity and are commonly associated with rheumatoid arthritis (RA). Unravelling pathways of importance in therapeutic partial response and failure is of critical importance, as this will potentially provide new insights into key drivers of immune-mediated pathogenesis.Objectives:To delineate disease-relevant T cell subsets in RA and assess their potential to act as cellular markers amenable to precision medicine approaches, particularly in the context of therapeutic partial or non-response.Methods:FACS-based immunophenotyping and ex-vivo functional response profiles of CD4+CD161+CCR2+CCR5+T cells were performed in peripheral blood mononuclear cells (PBMC) obtained from patients with RA and healthy controls, using previously characterised methodologies. RA patients fulfilled the 2010 ACR/EULAR criteria for RA. All samples were obtained after written consent, with the appropriate ethical approvals in place.Results:RA patients harboured a higher frequency of CCR2+CCR5+cells within the CD4+CD161+T cell compartment compared with healthy controls. In RA patients this T cell subset had a higher proportion of cells that secrete pro-inflammatory cytokines such as IL-17A, GM-CSF, IFN-γ, and TNF. Importantly, the CD4+CD161+CCR2+CCR5+T cell subset was significantly increased in DMARD non-responders compared to both responders and healthy controls. Moreover, in DMARD non-responders, these cells had a propensity to express increased proportions of pro-inflammatory cytokines. Notably, there was also a significant increase in the ratio of effector: regulatory T cell (Teff: Treg) compared to both responders and healthy controls. In addition, the CD4+CD161+CCR2+CCR5+T cell subset was less responsive to suppression by Tregs. In further support of a role for this T cell population in disease pathogenesis, the frequency of CD4+CD161+CCR2+CCR5+T cells significantly correlated with disease activity, as measured by the DAS28 (R2= 0.65; p = 0.003; n=11).Conclusion:Combined, our findings suggest that the CD4+CD161+CCR2+CCR5+T cell subset represents a substantially abnormal T cell subset in RA, exhibiting exaggerated pro-inflammatory responses, numerical abundance relative to Tregs, and resistant to regulation by Tregs. The CD4+CD161+CCR2+CCR5+T cell subset appears to be a marker of therapeutic response status in RA, via its contribution to disease pathology and highlights this subset as a potential therapeutic target in RA.References:[1]McInnes IB, Schett G. The pathogenesis of rheumatoid arthritis.N Engl J Med. 2011;365(23):2205-19.[2]Mexhitaj I, Nyirenda MH, Li R, O’Mahony J, Rezk A, Rozenberg A,et al. Abnormal effector and regulatory T cell subsets in paediatric-onset multiple sclerosis.Brain. 2019;142(3):617-32.[3]Cosmi L, Cimaz R, Maggi L, Santarlasci V, Capone M, Borriello F,et al. Evidence of the transient nature of the Th17 phenotype of CD4+CD161+T cells in the synovial fluid of patients with juvenile idiopathic arthritis.Arthritis Rheum. 2011;63(8):2504-15.Disclosure of Interests:Mukanthu Nyirenda: None declared, Iain McInnes Grant/research support from: Bristol-Myers Squibb, Celgene, Eli Lilly and Company, Janssen, and UCB, Consultant of: AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly and Company, Gilead, Janssen, Novartis, Pfizer, and UCB, Carl Goodyear: None declared
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Ekoru K, Young EH, Dillon DG, Gurdasani D, Stehouwer N, Faurholt-Jepsen D, Levitt NS, Crowther NJ, Nyirenda M, Njelekela MA, Ramaiya K, Nyan O, Adewole OO, Anastos K, Compostella C, Dave JA, Fourie CM, Friis H, Kruger IM, Longenecker CT, Maher DP, Mutimura E, Ndhlovu CE, Praygod G, Pefura Yone EW, Pujades-Rodriguez M, Range N, Sani MU, Sanusi M, Schutte AE, Sliwa K, Tien PC, Vorster EH, Walsh C, Gareta D, Mashili F, Sobngwi E, Adebamowo C, Kamali A, Seeley J, Smeeth L, Pillay D, Motala AA, Kaleebu P, Sandhu MS. HIV treatment is associated with a two-fold higher probability of raised triglycerides: Pooled Analyses in 21 023 individuals in sub-Saharan Africa. Glob Health Epidemiol Genom 2018; 3:e7. [PMID: 29881632 PMCID: PMC5985947 DOI: 10.1017/gheg.2018.7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 04/08/2018] [Accepted: 04/10/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Anti-retroviral therapy (ART) regimes for HIV are associated with raised levels of circulating triglycerides (TG) in western populations. However, there are limited data on the impact of ART on cardiometabolic risk in sub-Saharan African (SSA) populations. METHODS Pooled analyses of 14 studies comprising 21 023 individuals, on whom relevant cardiometabolic risk factors (including TG), HIV and ART status were assessed between 2003 and 2014, in SSA. The association between ART and raised TG (>2.3 mmol/L) was analysed using regression models. FINDINGS Among 10 615 individuals, ART was associated with a two-fold higher probability of raised TG (RR 2.05, 95% CI 1.51-2.77, I2=45.2%). The associations between ART and raised blood pressure, glucose, HbA1c, and other lipids were inconsistent across studies. INTERPRETATION Evidence from this study confirms the association of ART with raised TG in SSA populations. Given the possible causal effect of raised TG on cardiovascular disease (CVD), the evidence highlights the need for prospective studies to clarify the impact of long term ART on CVD outcomes in SSA.
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Affiliation(s)
- K. Ekoru
- Department of Medicine, University of Cambridge, Cambridge, UK
- Global Health and Populations Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - E. H. Young
- Department of Medicine, University of Cambridge, Cambridge, UK
- Global Health and Populations Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - D. G. Dillon
- Weill Cornell Medical College, New York City, New York, USA
| | - D. Gurdasani
- Department of Medicine, University of Cambridge, Cambridge, UK
- Global Health and Populations Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - N. Stehouwer
- University Hospitals Case Medical Center, Cleveland, Ohio, USA
| | - D. Faurholt-Jepsen
- Department of Infectious Diseases, University of Copenhagen (Rigshospitalet), Copenhagen, Denmark
| | - N. S. Levitt
- Division of Diabetic Medicine and Endocrinology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - N. J. Crowther
- Department of Chemical Pathology, National Health Laboratory Service, University of the Witwatersrand Medical School, Johannesburg, South Africa
| | - M. Nyirenda
- Malawi Epidemiology and Intervention Research Unit, Malawi, Lilongwe
| | - M. A. Njelekela
- Department of Physiology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - K. Ramaiya
- Shree Hindu Mandal Hospital, Dar es Salaam, Tanzania
| | - O. Nyan
- Royal Victoria Teaching Hospital, School of Medicine, University of The Gambia, Banjul, The Gambia
| | - O. O. Adewole
- Department of Medicine, Obafemi Awolowo University, Ile Ife, Nigeria
| | - K. Anastos
- Albert Einstein College of Medicine, Bronx NY, USA
| | - C. Compostella
- Department of Medicine, University of Padua, Padua, Italy
| | - J. A. Dave
- Division of Diabetic Medicine and Endocrinology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - C. M. Fourie
- HART (Hypertension in Africa Research Team), North-West University, Potchefstroom, South Africa
| | - H. Friis
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark
| | - I. M. Kruger
- Africa Unit for Transdisciplinary Health Research (AUTHeR), North-West University, Potchefstroom, South Africa
| | | | - D. P. Maher
- Special Programme for Research & Training in Tropical Diseases (TDR), World Health Organization, Geneva, Switzerland
| | - E. Mutimura
- Albert Einstein College of Medicine, Bronx NY, USA
| | - C. E. Ndhlovu
- Clinical Epidemiology Resource Training Centre, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - G. Praygod
- National Institute for Medical Research, Tanzania, Dar es Salaam
| | | | - M. Pujades-Rodriguez
- Epicentre, Médecins Sans Frontières, Paris, France
- Department of Epidemiology and Public Health, University College of London, Clinical Epidemiology Group, London, UK
| | - N. Range
- National Institute for Medical Research, Tanzania, Dar es Salaam
| | - M. U. Sani
- Cardiology Unit, Department of Medicine, Aminu Kano Teaching Hospital, Kano, Nigeria
| | - M. Sanusi
- Cardiology Unit, Department of Medicine, Aminu Kano Teaching Hospital, Kano, Nigeria
| | - A. E. Schutte
- HART (Hypertension in Africa Research Team), North-West University, Potchefstroom, South Africa
- MRC Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa
| | - K. Sliwa
- Soweto Cardiovascular Research Unit, Chris Hani Baragwanath Hospital, University of the Witwatersrand, Johannesburg, South Africa
| | - P. C. Tien
- Department of Medicine, University of California, San Francisco, USA
| | - E. H. Vorster
- Faculty of Health Sciences, North-West University, Potchefstroom, South Africa
| | - C. Walsh
- Department of Nutrition and Dietetics, University of the Free State, Bloemfontein, South Africa
| | - D. Gareta
- Africa Health Research Institute, University of KwaZulu-Natal, Durban, South Africa
| | - F. Mashili
- National Institute for Medical Research, Tanzania, Dar es Salaam
| | - E. Sobngwi
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Cameroon, Yaoundé
| | - C. Adebamowo
- Institute of Human Virology, Abuja, Nigeria
- Department of Epidemiology and Public Health, Institute of Human Virology and Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, USA
| | - A. Kamali
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda
| | - J. Seeley
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda
| | - L. Smeeth
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - D. Pillay
- Africa Health Research Institute, University of KwaZulu-Natal, Durban, South Africa
| | - A. A. Motala
- Department of Diabetes and Endocrinology, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - P. Kaleebu
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda
| | - M. S. Sandhu
- Department of Medicine, University of Cambridge, Cambridge, UK
- Global Health and Populations Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
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Becker MS, Durant SM, Watson FGR, Parker M, Gottelli D, M'soka J, Droge E, Nyirenda M, Schuette P, Dunkley S, Brummer R. Using dogs to find cats: detection dogs as a survey method for wide‐ranging cheetah. J Zool (1987) 2017. [DOI: 10.1111/jzo.12445] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- M. S. Becker
- Zambian Carnivore Programme Mfuwe Zambia
- Conservation Biology and Ecology Program Department of Ecology Montana State University Bozeman MT USA
| | - S. M. Durant
- Institute of Zoology Zoological Society of London London UK
- Wildlife Conservation Society Bronx Zoo Bronx NY USA
| | - F. G. R. Watson
- Zambian Carnivore Programme Mfuwe Zambia
- School of Natural Sciences California State University Monterey Bay Seaside CA USA
| | - M. Parker
- Working Dogs for Conservation Bozeman MT USA
| | - D. Gottelli
- Institute of Zoology Zoological Society of London London UK
| | - J. M'soka
- Zambian Carnivore Programme Mfuwe Zambia
- Conservation Biology and Ecology Program Department of Ecology Montana State University Bozeman MT USA
- Zambia Department of National Parks and Wildlife Chilanga Zambia
| | - E. Droge
- Zambian Carnivore Programme Mfuwe Zambia
- Conservation Biology and Ecology Program Department of Ecology Montana State University Bozeman MT USA
| | - M. Nyirenda
- World Wide Fund for Nature Zambia Country Office Lusaka Zambia
| | - P. Schuette
- Zambian Carnivore Programme Mfuwe Zambia
- Alaska Center for Conservation Science University of Alaska Anchorage Anchorage AK USA
| | - S. Dunkley
- Zambian Carnivore Programme Mfuwe Zambia
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Fraser-Taliente T, Mackie NE, Kaye S, Nyirenda M, Foster C. Off-licence use of once-daily maraviroc in children and adolescents with perinatally acquired HIV-1 infection. HIV Med 2016; 18:311-313. [PMID: 27981720 DOI: 10.1111/hiv.12467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - N E Mackie
- Imperial College Healthcare NHS Trust, London, W2 1NY
| | - S Kaye
- Imperial College, London, W2 1NY
| | - M Nyirenda
- Imperial College Healthcare NHS Trust, London, W2 1NY
| | - C Foster
- Imperial College Healthcare NHS Trust, London, W2 1NY
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9
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Ho A, Aston S, Jary H, Alaerts M, Menyere M, Mallewa J, Nyirenda M, Everett D, French N, Heyderman R. The impact of HIV infection on the burden and severity of influenza illness in Malawian adults. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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10
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Ekoru K, Young EH, Adebamowo C, Balde N, Hennig BJ, Kaleebu P, Kapiga S, Levitt NS, Mayige M, Mbanya JC, McCarthy MI, Nyan O, Nyirenda M, Oli J, Ramaiya K, Smeeth L, Sobngwi E, Rotimi CN, Sandhu MS, Motala AA. H3Africa multi-centre study of the prevalence and environmental and genetic determinants of type 2 diabetes in sub-Saharan Africa: study protocol. Glob Health Epidemiol Genom 2016; 1:e5. [PMID: 29276615 PMCID: PMC5732581 DOI: 10.1017/gheg.2015.6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/20/2015] [Accepted: 12/25/2015] [Indexed: 12/30/2022] Open
Abstract
The burden and aetiology of type 2 diabetes (T2D) and its microvascular complications may be influenced by varying behavioural and lifestyle environments as well as by genetic susceptibility. These aspects of the epidemiology of T2D have not been reliably clarified in sub-Saharan Africa (SSA), highlighting the need for context-specific epidemiological studies with the statistical resolution to inform potential preventative and therapeutic strategies. Therefore, as part of the Human Heredity and Health in Africa (H3Africa) initiative, we designed a multi-site study comprising case collections and population-based surveys at 11 sites in eight countries across SSA. The goal is to recruit up to 6000 T2D participants and 6000 control participants. We will collect questionnaire data, biophysical measurements and biological samples for chronic disease traits, risk factors and genetic data on all study participants. Through integrating epidemiological and genomic techniques, the study provides a framework for assessing the burden, spectrum and environmental and genetic risk factors for T2D and its complications across SSA. With established mechanisms for fieldwork, data and sample collection and management, data-sharing and consent for re-approaching participants, the study will be a resource for future research studies, including longitudinal studies, prospective case ascertainment of incident disease and interventional studies.
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Affiliation(s)
- K. Ekoru
- Department of Medicine, University of Cambridge, Cambridge, UK
- Genetic Epidemiology Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - E. H. Young
- Department of Medicine, University of Cambridge, Cambridge, UK
- Genetic Epidemiology Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - C. Adebamowo
- Institute of Human Virology, Abuja, Nigeria
- Department of Epidemiology and Public Health, Institute of Human Virology and Greenebaum Cancer Center, University of Maryland Baltimore School of Medicine, MD, USA
| | - N. Balde
- CHU Donka, University of Conakry, Non Communicable Disease Unit, Ministry of Health, Conackry, Guinea
| | - B. J. Hennig
- MRC International Nutrition Group at MRC Keneba, MRC Unit, The Gambia
- MRC International Nutrition Group, London School of Hygiene and Tropical Medicine, UK
| | - P. Kaleebu
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda
| | - S. Kapiga
- Mwanza Intervention Trials Unit/NIMR, Mwanza, Tanzania
- University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - N. S. Levitt
- Division of Diabetic Medicine and Endocrinology, Department of Medicine, University of Cape Town, Cape Town, Chronic Diseases Initiative in Africa, South Africa
| | - M. Mayige
- National Institute for Medical Research, Dar es Salaam, Tanzania
| | - J. C. Mbanya
- Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, Yaounde, Cameroon
| | - M. I. McCarthy
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Churchill Hospital, Old Road, Headington, Oxford, UK
- Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, UK
- Oxford NIHR Biomedical Research Centre, Churchill Hospital, Old Road, Headington, Oxford, UK
| | - O. Nyan
- Edward Francis Small Teaching Hospital, School of Medicine, University of The Gambia, Banjul, The Gambia
| | - M. Nyirenda
- Malawi Epidemiology and Intervention Research Unit, Lilongwe, Malawi
| | - J. Oli
- University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - K. Ramaiya
- Department of Medicine, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - L. Smeeth
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - E. Sobngwi
- Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, Yaounde, Cameroon
| | - C. N. Rotimi
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - M. S. Sandhu
- Department of Medicine, University of Cambridge, Cambridge, UK
- Genetic Epidemiology Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - A. A. Motala
- Department of Diabetes and Endocrinology, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
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Affiliation(s)
- W P Nakanga
- Malawi Epidemiology and Intervention Research Unit (MEIRU), Lilongwe, Malawi
| | - A Crampin
- Malawi Epidemiology and Intervention Research Unit (MEIRU), Lilongwe, Malawi
| | - M Nyirenda
- Malawi Epidemiology and Intervention Research Unit (MEIRU), Lilongwe, Malawi
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Abstract
BACKGROUND Anaemia is an important complication of trypanosomiasis. The mechanisms through which trypanosomal infection leads to anaemia are poorly defined. A number of studies have implicated inflammatory cytokines, but these data are limited and inconsistent. In this article, we reviewed the published literature on cytokines associated with Trypanosoma brucei infections and their role in the immunopathology leading to anaemia. METHODOLOGY Articles were searched in PubMed through screening of titles and abstracts with no limitation on date of publishing and study design. Articles in English were searched using keywords "African trypanosomiasis", "sleeping sickness", "Trypanosoma brucei", in all possible combinations with "anaemia" and/or "cytokines". RESULTS Twelve articles examining cytokines and their role in trypanosomeinduced anaemia were identified out of 1095 originally retrieved from PubMed. None of the articles identified were from human-based studies. A total of eight cytokines were implicated, with four cytokines (IFN-γ, IL-10, TNF-α, IL-12) showing an association with anaemia. These articles reported that mice lacking TNF-α were able to control anaemia, and that IFN-γ was linked to severe anaemia given its capacity to suppress erythropoiesis, while IL-10 was shown to regulate IFN-γ and TNF-α, providing a balance that was associated with severity of anaemia. IFN-γ and TNF-α have also been reported to work in concert with other factors such as nitric oxide and iron in order to induce anaemia. CONCLUSION IFN-γ, IL-10, and TNF-α were the three major cytokines identified to be heavily involved in anaemia caused by Trypanosoma brucei infection. The anti-inflammatory cytokine, IL-10, was shown to counter the effects of proinflammatory cytokines in order to balance the severity of anaemia. The mechanism of anaemia is multifactorial and therefore requires further, more elaborate research. Data from human subjects would also shed more light.
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Affiliation(s)
- J Musaya
- Department of Pathology, Microbiology Unit, College of Medicine, University of Malawi, Blantyre, Malawi
| | - E Matovu
- Department of Biotechnical and Diagnostic Sciences, College of Veterinary Sciences, Animal Resource and Biosecurity, Makerere University, Kampala, Uganda
| | - M Nyirenda
- Department of Medicine, College of Medicine, University of Malawi & Malawi-Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - J Chisi
- Department of Basic Medical Sciences, Anatomy Unit, College of Medicine, University of Malawi, Blantyre, Malawi
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13
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Touzard Romo F, Smeaton LM, Campbell TB, Riviere C, Mngqibisa R, Nyirenda M, Supparatpinyo K, Kumarasamy N, Hakim JG, Flanigan TP. Renal and metabolic toxicities following initiation of HIV-1 treatment regimen in a diverse, multinational setting: a focused safety analysis of ACTG PEARLS (A5175). HIV Clin Trials 2015; 15:246-60. [PMID: 25433664 DOI: 10.1310/hct1506-246] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Convenient dosing, potency, and low toxicity support use of tenofovir disoproxil fumarate (TDF) as preferred nucleotide reverse transcriptase inhibitor (NRTI) for HIV-1 treatment. However, renal and metabolic safety of TDF compared to other NRTIs has not been well described in resource-limited settings. METHODS This was a secondary analysis examining the occurrence of renal abnormalities (RAs) and renal and metabolic serious non-AIDS-defining events (SNADEs) through study follow-up between participants randomized to zidovudine (ZDV)/lamivudine/ efavirenz and TDF/emtricitabine/efavirenz treatment arms within A5175/PEARLS trial. Exact logistic regression explored associations between baseline covariates and RAs. Response profile longitudinal analysis compared creatinine clearance (CrCl) over time between NRTI groups. RESULTS Twenty-one of 1,045 participants developed RAs through 192 weeks follow-up; there were 15 out of 21 in the TDF arm (P = .08). Age 41 years or older (odds ratio [OR], 3.35; 95% CI, 1.1-13.1), his- tory of diabetes (OR, 10.7; 95% CI, 2.1-55), and lower baseline CrCl (OR, 3.1 per 25 mL/min decline; 95% CI, 1.7-5.8) were associated with development of RAs. Renal SNADEs occurred in 42 participants; 33 were urinary tract infections and 4 were renal failure/insufficiency; one event was attributed to TDF. Significantly lower CrCl values were maintained among patients receiving TDF compared to ZDV (repeated measures analysis, P = .05), however worsening CrCl from baseline was not observed with TDF exposure over time. Metabolic SNADEs were rare, but were higher in the ZDV arm (20 vs 3; P < .001). CONCLUSIONS TDF is associated with lower serious metabolic toxicities but not higher risk of RAs, serious renal events, or worsening CrCl over time compared to ZDV in this randomized multinational study.
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Affiliation(s)
- F Touzard Romo
- The Miriam Hospital, Providence, Rhode Island, USA Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - L M Smeaton
- Harvard School of Public Health, Boston, Massachusetts, USA
| | - T B Campbell
- University of Colorado Denver, Aurora, Colorado, USA
| | - C Riviere
- Institut Nacional de Laboratoire et Recherches, Port-au-Prince, Haiti
| | - R Mngqibisa
- University of KwaZulu-Natal, Durban, South Africa
| | - M Nyirenda
- College of Medicine - Johns Hopkins Research Project, Blantyre, Malawi
| | | | - N Kumarasamy
- YRG Centre for AIDS Research and Education, Chennai, India
| | - J G Hakim
- University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - T P Flanigan
- The Miriam Hospital, Providence, Rhode Island, USA Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
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14
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Syakalima M, Noinyane M, Ramaili T, Motsei L, Nyirenda M. A coprological assessment of cryptosporidiosis and giardiosis in pigs of mafikeng villages, north west province of South Africaa. INDIAN J ANIM RES 2015. [DOI: 10.5958/0976-0555.2015.00027.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Jaffar S, Amberbir A, Kayuni N, Musicha C, Nyirenda M. Viewpoint: scaling up testing services for non-communicable diseases in Africa: priorities for implementation research. Trop Med Int Health 2013; 18:1353-6. [DOI: 10.1111/tmi.12180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Jaffar
- London School of Hygiene and Tropical Medicine; London UK
| | - A. Amberbir
- London School of Hygiene and Tropical Medicine; London UK
- Karonga Prevention Study; Lilongwe Malawi
| | - N. Kayuni
- Karonga Prevention Study; Lilongwe Malawi
| | - C. Musicha
- Karonga Prevention Study; Lilongwe Malawi
| | - M. Nyirenda
- London School of Hygiene and Tropical Medicine; London UK
- Karonga Prevention Study; Lilongwe Malawi
- College of Medicine; University of Malawi; Blantyre Malawi
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16
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van der Maaten GC, Davies J, Nyirenda M, Chitani A, Allain TJ, Beeching NJ, Beadsworth MBJ, van Oosterhout JJ. HIV post-exposure prophylaxis programmes in the developed and developing world: can we learn from each other? Int J STD AIDS 2011; 22:751-2. [DOI: 10.1258/ijsa.2011.010423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In an audit of HIV post-exposure prophylaxis (PEP) programmes in Blantyre, Malawi, and Liverpool, UK, a striking common deficiency was poor attendance of follow-up visits and of HIV testing to determine efficacy of PEP. Causes of poor follow-up after PEP need to be explored in both settings.
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Affiliation(s)
| | - J Davies
- Tropical and Infectious Disease Unit, Royal Liverpool University Hospital and Liverpool School of Tropical Medicine, Liverpool, UK
| | - M Nyirenda
- Department of Medicine, College of Medicine, Blantyre, Malawi
| | - A Chitani
- Department of Medicine, College of Medicine, Blantyre, Malawi
| | - T J Allain
- Department of Medicine, College of Medicine, Blantyre, Malawi
| | - N J Beeching
- Tropical and Infectious Disease Unit, Royal Liverpool University Hospital and Liverpool School of Tropical Medicine, Liverpool, UK
| | - M B J Beadsworth
- Department of Medicine, College of Medicine, Blantyre, Malawi
- Tropical and Infectious Disease Unit, Royal Liverpool University Hospital and Liverpool School of Tropical Medicine, Liverpool, UK
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17
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Kumwenda JJ, Nyirenda M, Tomoka T, Ricken D, Chalulu K, Kamiza S. Case report-right iliac fossa mass in an HIV-positive woman. Cryptococcal meningitis. Malawi Med J 2011; 22:57-8. [PMID: 21614883 DOI: 10.4314/mmj.v22i2.58862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- J J Kumwenda
- Department of Internal Medicine, College of Medicine, University of Malawi
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18
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Mulinde HF, Tweya H, Chiwoko J, Feldacker C, Phiri S, Nyirenda M, Weigel R, Mlundira L. Cancer chemotherapy: early experience with combined chemotherapy for HIV-infected Kaposi's sarcoma patients at Lighthouse clinic, Lilongwe, Malawi. J Int AIDS Soc 2010. [PMCID: PMC3113001 DOI: 10.1186/1758-2652-13-s4-p216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Davies J, van Oosterhout JJG, Nyirenda M, Bowden J, Moore E, Hart IJ, Zijlstra EE, Chaponda M, Faragher B, Beeching NJ, Beadsworth MBJ. Reliability of rapid testing for hepatitis B in a region of high HIV endemicity. Trans R Soc Trop Med Hyg 2010; 104:162-4. [PMID: 19931107 DOI: 10.1016/j.trstmh.2009.10.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 10/20/2009] [Accepted: 10/20/2009] [Indexed: 12/14/2022] Open
Abstract
Hepatitis B (HBV) and HIV co-infection is common in resource-poor settings. A recent study from Malawi revealed poor correlation between hepatitis B surface antigen (HBsAg) point-of-care tests and reference tests in patients co-infected with HIV. We studied a cohort of 300 Malawian adults entering a treatment programme for HIV. Sera were tested for HBsAg first using the Determine rapid test and re-tested using a commercial enzyme immunoassay (EIA). All tests were done under optimal conditions in Liverpool, UK. Sera from all 25 patients positive for HBsAg using the rapid test and from 50 who were negative, were re-tested using the EIA, with complete concordance of results. The kappa correlation was 1, specificity 100% (93-100%) and sensitivity 100% (86-100%) compared to the reference test. Patients had advanced immune suppression (mean CD4=175 cells x 10(6)/l). In a non-field setting, the results of point-of-care Determine rapid hepatitis B tests appear reliable in patients with HIV-1 co-infection.
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Affiliation(s)
- J Davies
- Tropical and Infectious Disease Unit, Royal Liverpool University Hospital, Liverpool L7 8XP, UK
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20
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Gladstone M, Lancaster G, Umar E, Nyirenda M, Kayira E, van den Broek N, Smyth RL. Perspectives of normal child development in rural Malawi - a qualitative analysis to create a more culturally appropriate developmental assessment tool. Child Care Health Dev 2010; 36:346-53. [PMID: 19719769 DOI: 10.1111/j.1365-2214.2009.01008.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Child development in developing countries is often evaluated using assessment tools created for 'Western' settings. Recent work has demonstrated that, for certain developmental milestones, 'Western' tools may be inaccurate as they include items unfamiliar to children of different cultural settings. METHODS We used qualitative methods to gather information about normal development in an African setting. Ten village and two professional focus group discussions (FGDs) were conducted. We used purposive sampling methods to recruit groups of mothers, grandmothers and men in four areas of Southern Malawi for village FGDs. Separate FGDs were carried out with professionals working in areas relating to child development. A thematic content analysis established main patterns and themes and dissemination of results and continued feedback allowed for respondent validation and reflection of results. The information then gathered was used to create questions for a revised Malawian developmental assessment tool. RESULTS Social and gross motor milestones were the main focus of interest for village and professional FGDs with the latter creating new language and fine motor concepts. Social milestones highlighted included 'duties and chores', 'sharing' and 'taking up leadership roles'. Language milestones included 'reporting events' and 'shrugging to indicate no' and fine motor milestones included 'peeling bananas', 'sorting maize' and 'making patterns with bottle tops'. Intelligence was described in relation to social and community integrity rather than 'Western' concepts of numeracy and literacy. CONCLUSIONS Concepts, ideas and language relating to normal development in a sub-Saharan African setting have been gathered in this study. These have been used to create items for a more culturally appropriate developmental assessment tool.
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Affiliation(s)
- M Gladstone
- Department of Paediatrics, University of Liverpool, Liverpool, UK.
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21
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Maher D, Biraro S, Hosegood V, Isingo R, Lutalo T, Mushati P, Ngwira B, Nyirenda M, Todd J, Zaba B. Translating global health research aims into action: the example of the ALPHA network. Trop Med Int Health 2010; 15:321-8. [PMID: 20070637 DOI: 10.1111/j.1365-3156.2009.02456.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There is increasing consensus on the importance of strengthening global health research to meet health and development goals. Three key global health research aims are to ensure that research (i) addresses priority health needs, (ii) contributes to policy development, and (iii) adds value to investments in developing countries through South-South collaboration and capacity-strengthening in the South. The ALPHA network (Analysing Longitudinal Population-based HIV/AIDS data on Africa) is an illustrative example of how these global health research aims can be translated into action. The network facilitates additional collaborative HIV epidemiological research among six independent research projects in Africa studying population-based cohorts. Under the first of the earlier mentioned aims, the network addresses key epidemiology research issues in HIV/AIDS which are crucial to making progress and monitoring progress in the response against HIV/AIDS. Under the second aim, the network's scientific programme of research has contributed to strengthening the evidence base on HIV epidemiology in Africa and has informed policy development in areas such as targeted HIV prevention, social support, monitoring epidemic response and epidemic forecasting. Under the third aim, investment in the network has added value to the research investment in the individual projects through capacity development among African researchers as well as through the collaborative research outputs of the individual projects. Lessons from the network are relevant to collaborations facing similar challenges in other areas of global health research. These include the importance of establishing transparent and efficient governance for research collaborations, developing advance consensus on data sharing, ensuring effective communication for networking and demonstrating the added value of research investment in South-South collaborations.
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Affiliation(s)
- D Maher
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda.
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22
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Nyirenda M, Latham T, Glover S. Ward Round - Recurrent anemia and infection in an HIVpositive woman. Malawi Med J 2009. [DOI: 10.4314/mmj.v21i2.44557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
OBJECTIVES To identify factors associated with sexual debut and early age at first sex (AFS) among young men and women (12-25 years) in a population with a high prevalence and incidence of HIV in rural South Africa. METHODS Longitudinal data from four rounds (2003-7) of a prospective population-based HIV and sexual behaviour survey in rural KwaZulu-Natal were used to investigate the distribution and predictors of earlier first sex. Survival analyses were used, and each analysis considered men and women separately. RESULTS Among the 4724 women and 4029 men who were virgins at the beginning of the period, the median AFS was 18.5 and 19.2 years, respectively. In multivariable models, factors associated with earlier AFS across gender were periurban residence (vs rural), ever use of alcohol and knowing at least one person who had HIV, while school attendance had a significant protective effect. Other factors were important for one gender only. Maternal death was significantly associated with earlier AFS for women, in the same way that paternal death was for young men, while mother's membership of the same household significantly delayed AFS of young men. The analysis of early first sex confirmed the same factors to be important as in the overall analyses for men and women. CONCLUSION Given the association of individual, household and community level factors with sexual debut, a multisectorial approach to prevention and targeting in youth programmes is recommended.
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Affiliation(s)
- N McGrath
- Infectious Disease Epidemiology Unit, London School of Hygiene and Tropical Medicine, London, UK.
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24
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Marston M, Slaymaker E, Cremin I, Floyd S, McGrath N, Kasamba I, Lutalo T, Nyirenda M, Ndyanabo A, Mupambireyi Z, Zaba B. Trends in marriage and time spent single in sub-Saharan Africa: a comparative analysis of six population-based cohort studies and nine Demographic and Health Surveys. Sex Transm Infect 2009; 85 Suppl 1:i64-71. [PMID: 19307343 PMCID: PMC2654103 DOI: 10.1136/sti.2008.034249] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/20/2009] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To describe trends in age at first sex (AFS), age at first marriage (AFM) and time spent single between events and to compare age-specific trends in marital status in six cohort studies. METHODS Cohort data from Uganda, Tanzania, South Africa, Zimbabwe and Malawi and Demographic and Health Survey (DHS) data from Uganda, Tanzania and Zimbabwe were analysed. Life table methods were used to calculate median AFS, AFM and time spent single. In each study, two surveys were chosen to compare marital status by age and identify changes over time. RESULTS Median AFM was much higher in South Africa than in the other sites. Between the other populations there were considerable differences in median AFS and AFM (AFS 17-19 years for men and 16-19 years for women, AFM 21-24 years and 18-19 years, respectively, for the 1970-9 birth cohort). In all surveys, men reported a longer time spent single than women (median 4-7 years for men and 0-2 years for women). Median years spent single for women has increased, apart from in Manicaland. For men in Rakai it has decreased slightly over time but increased in Kisesa and Masaka. The DHS data showed similar trends to those in the cohort data. The age-specific proportion of married individuals has changed little over time. CONCLUSIONS Median AFS, AFM and time spent single vary considerably among these populations. These three measures are underlying determinants of sexual risk and HIV infection, and they may partially explain the variation in HIV prevalence levels between these populations.
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Affiliation(s)
- M Marston
- Centre for Population Studies, London School of Hygiene and Tropical Medicine, London, UK.
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Nyirenda M, Beadsworth MBJ, Stephany P, Hart CA, Hart IJ, Munthali C, Beeching NJ, Zijlstra EE. Prevalence of infection with hepatitis B and C virus and coinfection with HIV in medical inpatients in Malawi. J Infect 2008; 57:72-7. [PMID: 18555534 DOI: 10.1016/j.jinf.2008.05.004] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 05/12/2008] [Accepted: 05/12/2008] [Indexed: 01/03/2023]
Abstract
BACKGROUND Coinfection with hepatitis B (HBV) or hepatitis C (HCV) adversely affects the prognosis of HIV infection and vice versa, and results in complex interactions with antiretroviral therapy. These infections are common in sub-Saharan Africa but there are few data on prevalence of coinfection. All three components of the most common ART regimen used in Africa, stavudine, lamivudine and nevirapine, can cause hepatic problems and lamivudine resistant HBV is known to emerge after HBV monotherapy in coinfected patients. Point of care (POC) tests for HBV and HCV are widely used but have not been validated in field tests in sub-Saharan Africa. METHODS Prospective observational study of sequential adult inpatients in medical wards of a large urban teaching hospital in Malawi in 2004. Comparison of demographic risk factors with HIV antibody status determined using local double POC test protocols, and with HBsAg and HCV antibody prevalence as estimated in a reference laboratory in Liverpool, UK. Results of locally performed POC tests for HBV using Determine HBsAg (Abbott) and for HCV antibody using HCV-SPOT (Genelabs) were compared with results of reference methods in the UK. RESULTS Of 226 adults (39% male), median (range) age 35 (14-80) years, 81% had a history of traditional scarification, 12% a history of blood transfusion and 11% a history of jaundice. HIV antibodies were present in 76.1%, HBsAg in 17.5% and HCV in 4.5%, with HIV/HBV coinfection in 20.4% and HIV/HCV coinfection in 5% of those with HIV. There was no correlation between prevalence of any of the three viruses and demographic risk factors or presence of either of the other two viruses. Point of care tests gave misleading results with prevalence estimates of 38% for HBV and 4.5% for HCV. For both of these POC tests the performance indices were unacceptable for individual patient management or epidemiological survey purposes. CONCLUSIONS The high prevalence of hepatitis/HIV coinfections may impact on treatment with antiretroviral therapy, especially if there are unintended interruptions of therapy, and studies are needed to document the possible clinical impact on ART programmes. The poor performance of POC tests for HBV and HCV may be due to local operational problems or to unexpected technical issues not revealed by early validation tests. These tests are widely used in resource poor settings and should be revalidated in prospective field studies in areas of the tropics with high HIV prevalence rates.
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Affiliation(s)
- M Nyirenda
- Department of Medicine, College of Medicine, Private Bag 360, Chichiri, Blantyre 3, Malawi
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Abstract
BACKGROUND Screening of children in household contact with smear-positive tuberculosis (TB) is universally recommended but seldom practiced in resource-poor settings. It has huge potential to reduce the burden of TB disease in children, particularly if streamlined to focus on those at greatest risk. AIMS To assess the prevalence of infection and disease amongst children aged < or = 5 yrs in household contact with smear-positive TB. To identify which source case characteristics are risk factors for infection. METHODS A prospective, hospital-based audit was conducted over a 17-mth period in Southern Malawi. Smear-positive adults were identified and encouraged to bring their children to the outpatient clinic, in accordance with the national TB programme guidelines. Full assessment was performed, including tuberculin skin test. RESULTS 195 children aged < or = 5 yrs who were contacts of 161 source cases were assessed. Prevalences of TB infection and disease were high (45% and 23%, respectively). The likelihood of a child being infected was significantly greater with increasing smear-positivity of the source case, and also if the source case were female (OR 2.25, 95% CI 1.19-4.27, p = 0.01). CONCLUSIONS The high prevalence of TB infection and disease in child contacts attending this hospital-based clinic supports the current policy of contact-screening in Malawi. However, community-based studies are needed to provide a more accurate assessment of prevalence and risks for child contacts.
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Affiliation(s)
- R Sinfield
- Department of Paediatrics, College of Medicine University of Malawi, Malawi.
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Nyirenda M, Sinfield R, Haves S, Molyneux EM, Graham SM. Poor attendance at a child TB contact clinic in Malawi. Int J Tuberc Lung Dis 2006; 10:585-7. [PMID: 16704044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
SETTING Child tuberculosis (TB) contact clinic, Queen Elizabeth Central Hospital, Blantyre, Malawi. DESIGN Patients registered with smear-positive pulmonary TB (PTB) were encouraged to bring childhood household contacts to the clinic for assessment and management. Data of TB cases registered over the same period were collected from the Blantyre District TB Office. RESULTS Attendance at the contact clinic was very poor, representing only 7.7% of all adults registered with smear-positive PTB over 17 months, and was significantly lower for potential male source cases than females (OR 0.36, 95% CI 0.23-0.55, P < 0.001). DISCUSSION Improved uptake and implementation of child contact management in Malawi is a challenge.
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Affiliation(s)
- M Nyirenda
- Department of Paediatrics, College of Medicine, Blantyre, Malawi
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Nyirenda M, Borgstein ES, Graham SM. Persistent cough and haemoptysis in an 8-year old boy - case report. Malawi Med J 2006. [DOI: 10.4314/mmj.v17i3.10889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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McCormick JA, Lyons V, Jacobson MD, Noble J, Diorio J, Nyirenda M, Weaver S, Ester W, Yau JL, Meaney MJ, Seckl JR, Chapman KE. 5'-heterogeneity of glucocorticoid receptor messenger RNA is tissue specific: differential regulation of variant transcripts by early-life events. Mol Endocrinol 2000; 14:506-17. [PMID: 10770488 DOI: 10.1210/mend.14.4.0438] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Glucocorticoid receptor (GR) gene expression is regulated in a complex tissue-specific manner, notably by early-life environmental events that program tissue GR levels. We have identified and characterized several new rat GR mRNAs. All encode a common protein, but differ in their 5'-leader sequences as a consequence of alternate splicing of, potentially, 11 different exon 1 sequences. Most are located in a 3-kb CpG island, upstream of exon 2, that exhibits substantial promoter activity in transfected cells. Ribonuclease (RNase) protection analysis demonstrated significant levels of six alternate exons 1 in vivo in rat, with differences between liver, hippocampus, and thymus reflecting tissue-specific differences in promoter activity. Two of the alternate exons 1 (exons 1(6) and 1(10)) were expressed in all tissues examined, together present in 77-87% of total GR mRNA. The remaining GR transcripts contained tissue-specific alternate first exons. Importantly, tissue-specific first exon usage was altered by perinatal environmental manipulations. Postnatal handling, which permanently increases GR in the hippocampus, causing attenuation of stress responses, selectively elevated GR mRNA containing the hippocampus-specific exon 1(7). Prenatal glucocorticoid exposure, which increases hepatic GR expression and produces adult hyperglycemia, decreased the proportion of hepatic GR mRNA containing the predominant exon 1(10), suggesting an increase in a minor exon 1 variant. Such tissue specificity of promoter usage allows differential GR regulation and programming.
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Affiliation(s)
- J A McCormick
- Molecular Endocrinology, University of Edinburgh, Molecular Medicine Centre, Western General Hospital, United Kingdom
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