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1.
BMJ Open ; 8(5): e020673, 2018 05 05.
Artigo em Inglês | MEDLINE | ID: mdl-29730627

RESUMO

OBJECTIVE: To assess changes in metabolic risk factors and cancer-related growth factors associated with short-term abstinence from alcohol. DESIGN: Prospective, observational study. SETTING: Single tertiary centre. PARTICIPANTS: Healthy subjects were recruited based on intention to: (1) abstain from alcohol for 1 month (abstinence group), or (2) continue to drink alcohol (control group). Inclusion criteria were baseline alcohol consumption >64 g/week (men) or >48 g/week (women). Exclusion criteria were known liver disease or alcohol dependence. PRIMARY AND SECONDARY OUTCOME MEASURES: The primary outcome was change in insulin resistance (homeostatic model assessment (HOMA) score). Secondary outcomes were changes in weight, blood pressure (BP), vascular endothelial growth factor (VEGF), epidermal growth factor (EGF) and liver function tests. Primary and secondary outcomes were adjusted for changes in diet, exercise and cigarette smoking. RESULTS: The abstinence group comprised 94 participants (mean age 45.5 years, SD ±1.2) and the control group 47 participants (mean age 48.7 years, SD ±1.8). Baseline alcohol consumption in the abstinence group was 258.2 g/week, SD ±9.4, and in the control group 233.8 g, SD ±19.0. Significant reductions from baseline in the abstinence group (all p<0.001) were found in: HOMA score (-25.9%, IQR -48.6% to +0.3%), systolic BP (-6.6%, IQR -11.8% to 0.0%), diastolic BP (-6.3%, IQR -14.1% to +1.3%), weight (-1.5%, IQR -2.9% to -0.4%), VEGF (-41.8%, IQR -64.9% to -17.9%) and EGF (-73.9%, IQR -86.1% to -36.4%). None of these changes were associated with changes in diet, exercise or cigarette smoking. No significant changes from baseline in primary or secondary outcomes were noted in the control group. CONCLUSION: These findings demonstrate that abstinence from alcohol in moderate-heavy drinkers improves insulin resistance, weight, BP and cancer-related growth factors. These data support an independent association of alcohol consumption with cancer risk, and suggest an increased risk of metabolic diseases such as type 2 diabetes and fatty liver disease.


Assuntos
Consumo de Bebidas Alcoólicas/efeitos adversos , Alcoolismo/complicações , Doenças Cardiovasculares/etiologia , Etanol/farmacologia , Resistência à Insulina , Fígado/efeitos dos fármacos , Neoplasias/etiologia , Adulto , Consumo de Bebidas Alcoólicas/sangue , Alcoolismo/sangue , Pressão Sanguínea/efeitos dos fármacos , Peso Corporal/efeitos dos fármacos , Doenças Cardiovasculares/sangue , Doenças Cardiovasculares/prevenção & controle , Diabetes Mellitus Tipo 2/etiologia , Fator de Crescimento Epidérmico/sangue , Etanol/administração & dosagem , Fígado Gorduroso/etiologia , Feminino , Humanos , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Neoplasias/sangue , Neoplasias/prevenção & controle , Estudos Prospectivos , Fatores de Risco , Fator A de Crescimento do Endotélio Vascular/sangue
2.
PLoS One ; 12(3): e0173811, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28333945

RESUMO

The Mycobacterium genus comprises over one-hundred-and-fifty recognised species, the majority of which reside in the environment and many of which can be pathogenic to mammals. Some species of environmental mycobacteria may interfere with BCG vaccination efficacy and in tuberculin test interpretation. Examining biogeographic trends in the distribution of members of the mycobacteria across a number of physicochemical and spatial gradients in soil and water environments across Ethiopia using oligotyping identified differential distributions of pathogenic and significant species. The tuberculosis complex was identified in more than 90% of water samples and taxonomic groups implicated in lower BCG vaccine efficiency were core in both soil and water Mycobacterium communities. A reservoir of Mycobacterium bovis was identified in water, with up to 7.3×102 genome equivalents per ml. Elevation, temperature, habitat and vegetation type were important predictors of both soil and water Mycobacterium communities. These results represent the first step in understanding the potential risk of exposure to environmental mycobacteria that may undermine efforts to reduce disease incidence.


Assuntos
Reservatórios de Doenças/microbiologia , Mycobacterium/fisiologia , Altitude , Biodiversidade , Meio Ambiente , Etiópia/epidemiologia , Humanos , Mycobacterium bovis/fisiologia , Microbiologia do Solo , Microbiologia da Água
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