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1.
Health Promot Pract ; 24(4): 728-739, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-35414293

RESUMO

BACKGROUND AND PURPOSE: There is growing interest in expanding healthy eating interventions in the retail setting. The purpose of this study was to evaluate the implementation of a successful 2-for-1 price incentive for fruits and vegetables (F&V), including frozen and canned, that took place in partnership with a large chain grocery retailer in Maine. Intervention Approach. A randomized controlled trial (RCT) pilot study was conducted in 2015-2016, followed by a larger RCT in 2016-2017, to assess whether a supermarket double-dollar F&V incentive increased purchases of these items. EVALUATION METHODS: A convergent, parallel mixed-methods design was used to examine barriers and facilitators to implementing the interventions, using six implementation outcomes: acceptability, adoption, appropriateness, feasibility, implementation fidelity, and perceived cost. RESULTS: The intervention was deemed highly acceptable, appropriate, and feasible by shoppers, retailers, and researchers. The F&V discount had a high rate of initial adoption. There was a moderate degree of fidelity, which improved over time based on lessons learned from the pilot and applied to the subsequent RCT. Specific costs associated with implementation from the research perspective are reported. Implications for Practice, Policy, and Research. Partnerships between academic researchers and retailers can be an effective model for improving healthful purchases among shoppers. These findings are relevant for investigators, public health advocates, and retailers interested in implementing similar grocery retail-based interventions.


Assuntos
Frutas , Verduras , Humanos , Motivação , Marketing , Dieta Saudável , Comércio
2.
BMC Musculoskelet Disord ; 22(1): 138, 2021 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-33541314

RESUMO

BACKGROUND: Although telehealth is becoming more popular for delivery of care for individuals with musculoskeletal pain, to our knowledge telehealth has not been used to manage Achilles tendinopathy. This research aimed to explore the experience of participants and physiotherapists with gym-based exercise interventions for Achilles tendinopathy monitored via videoconference. METHODS: A qualitative, interpretive description design was performed using semi-structured interviews (8 participants) and a focus group (7 physiotherapists). Participants and physiotherapists were interviewed about their experiences of the use of telehealth during a gym-based exercise intervention incorporating different calf load parameters for Achilles tendinopathy. We employed an inductive thematic analysis approach to analyse the data. RESULTS: Three themes identified from both participants and physiotherapists included i) acceptability of telehealth; ii) enablers to adherence with telehealth; and iii) barriers to adherence with telehealth. Two extra themes arose from participants regarding adherence with gym-based exercise, including enablers to adherence with the exercise intervention, and barriers to adherence with the exercise intervention. Both participants and physiotherapists expressed overall satisfaction and acceptability of telehealth monitoring of gym-based exercise. CONCLUSION: Gym-based exercise intervention for Achilles tendinopathy involving weekly telehealth monitoring was acceptable to both participants and physiotherapists. Potential enablers and barriers were identified that may improve adherence to this type of intervention.


Assuntos
Tendão do Calcâneo , Fisioterapeutas , Telemedicina , Tendinopatia , Exercício Físico , Terapia por Exercício , Humanos , Tendinopatia/terapia
3.
Biochem Biophys Res Commun ; 525(4): 936-940, 2020 05 14.
Artigo em Inglês | MEDLINE | ID: mdl-32173534

RESUMO

Toll-like receptors (TLRs) play a key role in the recognition of microbes via detection of specific and conserved microbial molecular features. TLRs, mainly expressed in immune cells, interact with intestinal microbiome. Little is known about mechanism(s) of sensing of bacteria by the intestinal surface enteroendocrine cells (EECs). We show here that TLR9 is expressed by the EECs of proximal intestine in a range of species and is co-expressed with the satiety hormone cholecystokinin (CCK). CCK secreted in excess induces emesis (vomiting). Using an EEC model cell line, STC-1, we demonstrate that in response to the TLR9 agonist, DNA containing unmethylated CpG dinucleotide motifs, STC-1 cells secrete CCK and that this secretion is inhibited by specific inhibitors of TLR9. Exposure of STC-1 cells to heat-inactivated pathogenic bacteria, Escherichia coli O55/H7, Shigella flexneri 2457T, Salmonella typhimurium ST4/74, and non-pathogenic Lactobacillus amylovorus GRL1112, results to an increase in CCK secretion compared to untreated control. The magnitudes of CCK release are higher in response to pathogenic bacteria and lowest in response to the non-pathogenic L. amylovorus. The pathogenic strains not only have substantially bigger genomes than L. amylovorus, they also have significantly higher numbers/frequency of RR/CG/YY stimulatory CpG hexamers in their genomic DNA. Pathogen-induced excessive secretion of the gut hormone CCK, provoking emesis can serve as a protective mechanism against development of enteric infections.


Assuntos
Colecistocinina/metabolismo , Células Enteroendócrinas/metabolismo , Células Enteroendócrinas/microbiologia , Interações Hospedeiro-Patógeno/fisiologia , Receptor Toll-Like 9/metabolismo , Animais , Linhagem Celular , Feminino , Genoma Bacteriano , Intestinos/citologia , Masculino , Camundongos Endogâmicos C57BL , Suínos , Receptores Toll-Like/metabolismo
4.
Br J Dermatol ; 182(1): 147-155, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31049933

RESUMO

BACKGROUND: The malignant mechanisms that control the development of cutaneous T-cell lymphoma (CTCL) are beginning to be identified. Recent evidence suggests that disturbances in specific intracellular signalling pathways, such as RAS-mitogen-activated protein kinase, T-cell receptor (TCR)-phospholipase C gamma 1 (PLCG1)-nuclear factor of activated T cells (NFAT) and Janus kinase (JAK)-signal transducer and activator of transcription (STAT), may play an essential role in the pathogenesis of CTCL. OBJECTIVES: To investigate the mechanisms controlling disease development and progression in mycosis fungoides (MF), the most common form of CTCL. METHODS: We collected 100 samples that were submitted for diagnosis of, or a second opinion regarding, MF between 2001 and 2018, 80% of which were in the early clinical stages of the disease. Formalin-fixed paraffin-embedded tissues were used for histological review and to measure the expression by immunohistochemistry of surrogate markers of activation of the TCR-PLCG1-NFAT, JAK-STAT and NF-κB pathways. Folliculotropism and large-cell transformation were also examined. RESULTS: NFAT and nuclear factor kappa B (NF-κB) markers showed a comparable activation status in early and advanced stages, while STAT3 activation was more frequent in advanced stages and was associated with large-cell transformation. Consistently with this observation, STAT3 activation occurred in parallel with MF progression in two initially MF-negative cases. A significant association of NFAT with NF-κB markers was also found, reflecting a common mechanism of activation in the two pathways. Genomic studies identified nine mutations in seven genes known to play a potential role in tumorigenesis in T-cell leukaemia/lymphoma, including PLCG1, JAK3 and STAT3, which underlies the activation of these key cell-survival pathways. A higher mutational allele frequency was detected in advanced stages. CONCLUSIONS: Our results show that STAT3 is activated in advanced cases and is associated with large-cell transformation, while the activation of NFAT and NF-κB is maintained throughout the disease. These findings could have important diagnostic and therapeutic implications. What's already known about this topic? Mycosis fungoides is characterized by a clonal expansion of T cells in the skin. The mechanisms controlling disease development and progression are not fully understood. What does this study add? An association of the nuclear factor of activated T cells and nuclear factor kappa B pathways was found, which could reflect a common mechanism of activation. These pathways were activated in early and advanced stages at the same level. Signal transducer and activator of transcription 3 activation was associated with large-cell transformation and was more frequent in advanced stages. A genomic analysis of cutaneous T-cell lymphoma-associated genes was performed. Nine mutations were detected. What is the translational message? These results could have important implications for the treatment of MF in the near future.


Assuntos
Linfoma Cutâneo de Células T , Micose Fungoide , NF-kappa B , Fatores de Transcrição NFATC , Fator de Transcrição STAT3 , Neoplasias Cutâneas , Humanos , Micose Fungoide/genética , Fator de Transcrição STAT3/genética , Fator de Transcrição STAT3/metabolismo , Neoplasias Cutâneas/genética , Linfócitos T/metabolismo
5.
Reprod Health ; 15(1): 19, 2018 Feb 02.
Artigo em Inglês | MEDLINE | ID: mdl-29394947

RESUMO

BACKGROUND: The health of women and children are critical for global development. The Sustainable Development Goals (SDG) agenda and the Global Strategy for Women's, Children's, and Adolescent's Health 2016-2030 aim to reduce maternal and newborn deaths, disability, and enhancement of well-being. However, information and data on measuring countries' progress are limited given the variety of methodological challenges of measuring care around the time of birth, when most maternal and neonatal deaths and morbidities occur. MAIN BODY: In 2015, the World Health Organization launched Mother and Newborn Information for Tracking Outcomes and Results (MoNITOR), a technical advisory group to WHO. MoNITOR comprises 14 independent global experts from a variety of disciplines selected in a competitive process for their technical expertise and regional representation. MoNITOR will provide technical guidance to WHO to ensure harmonized guidance, messages, and tools so that countries can collect useful data to track progress toward achieving the Sustainable Development Goals. SHORT CONCLUSION: Ultimately, MoNITOR will provide technical guidance to WHO to ensure harmonized guidance, messages, and tools so that countries can collect useful data to track progress toward achieving the Sustainable Development Goals.


Assuntos
Serviços de Saúde da Criança/organização & administração , Fidelidade a Diretrizes , Saúde do Lactente/normas , Serviços de Saúde Materna/organização & administração , Saúde da Mulher/normas , Feminino , Humanos , Recém-Nascido , Gravidez
6.
Am J Transplant ; 17(4): 1112-1118, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-27643615

RESUMO

Beta cell death may occur both after islet isolation and during infusion back into recipients undergoing total pancreatectomy with islet autotransplantation (TPIAT) for chronic pancreatitis. We measured the novel beta cell death marker unmethylated insulin (INS) DNA in TPIAT recipients before and immediately after islet infusion (n = 21) and again 90 days after TPIAT, concurrent with metabolic functional assessments (n = 25). As expected, INS DNA decreased after pancreatectomy (p = 0.0002). All TPIAT recipients had an elevated unmethylated INS DNA ratio in the first hours following islet infusion. In four samples (three patients), INS DNA was also assessed immediately after islet isolation and again before islet infusion to assess the impact of the isolation process: Unmethylated and methylated INS DNA fractions both increased over this interval, suggesting death of beta cells and exocrine tissue before islet infusion. Higher glucose excursion with mixed-meal tolerance testing was associated with persistently elevated INS DNA at day 90. In conclusion, we observed universal early elevations in the beta cell death marker INS DNA after TPIAT, with pronounced elevations in the islet supernatant before infusion, likely reflecting beta cell death induced by islet isolation. Persistent posttransplant elevation of INS DNA predicted greater hyperglycemia at 90 days.


Assuntos
Metilação de DNA , DNA/química , Diabetes Mellitus Tipo 1/cirurgia , Células Secretoras de Insulina/patologia , Insulina/genética , Transplante das Ilhotas Pancreáticas , Pancreatectomia/efeitos adversos , Pancreatite Crônica/cirurgia , Adolescente , Adulto , Biomarcadores/metabolismo , Criança , DNA/genética , Feminino , Rejeição de Enxerto , Sobrevivência de Enxerto , Humanos , Células Secretoras de Insulina/metabolismo , Masculino , Complicações Pós-Operatórias , Prognóstico , Estudos Prospectivos , Fatores de Risco , Transplante Autólogo , Adulto Jovem
7.
Am J Transplant ; 17(2): 443-450, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27459721

RESUMO

Insulin independence after total pancreatectomy and islet autotransplant (TPIAT) for chronic pancreatitis is limited by a high rate of postprocedure beta cell apoptosis. Endogenous glucagon-like peptide-1 and glucose-dependent insulinotropic peptide, which are increased by dipeptidyl peptidase 4 inhibitor therapy (sitagliptin) may protect against beta cell apoptosis. To determine the effect of sitagliptin after TPIAT, 83 adult TPIAT recipients were randomized to receive sitagliptin (n = 54) or placebo (n = 29) for 12 months after TPIAT. At 12 and 18 months after TPIAT, participants were assessed for insulin independence; metabolic testing was performed with mixed meal tolerance testing and frequent sample intravenous glucose tolerance testing. Insulin independence did not differ between the sitagliptin and placebo groups at 12 months (42% vs. 45%, p = 0.82) or 18 months (36% vs. 44%, p = 0.48). At 12 months, insulin dose was 9.0 (standard error 1.7) units/day and 7.9 (2.2) units/day in the sitagliptin and placebo groups, respectively (p = 0.67) and at 18 months 10.3 (1.9) and 7.1 (2.6) units/day, respectively (p = 0.32). Hemoglobin A1c levels and insulin secretory measures were similar in the two groups, as were adverse events. In conclusion, sitagliptin could be safely administered but did not improve metabolic outcomes after TPIAT.


Assuntos
Diabetes Mellitus/terapia , Rejeição de Enxerto/tratamento farmacológico , Sobrevivência de Enxerto/efeitos dos fármacos , Células Secretoras de Insulina/patologia , Transplante das Ilhotas Pancreáticas/efeitos adversos , Pancreatectomia/efeitos adversos , Fosfato de Sitagliptina/uso terapêutico , Adulto , Glicemia , Feminino , Hemoglobinas Glicadas , Rejeição de Enxerto/etiologia , Humanos , Hipoglicemiantes/uso terapêutico , Masculino , Transplante Autólogo
9.
Am J Transplant ; 16(2): 527-34, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26588810

RESUMO

Total pancreatectomy with islet autotransplantation (TPIAT) may relieve the pain of chronic pancreatitis while avoiding postsurgical diabetes. Minimizing hyperglycemia after TPIAT limits beta cell apoptosis during islet engraftment. Closed-loop (CL) therapy combining an insulin pump with a continuous glucose monitor (CGM) has not been investigated previously in islet transplant recipients. Our objective was to determine the feasibility and efficacy of CL therapy to maintain glucose profiles close to normoglycemia following TPIAT. Fourteen adult subjects (36% male; aged 35.9 ± 11.4 years) were randomized to subcutaneous insulin via CL pump (n = 7) or multiple daily injections with blinded CGM (n = 7) for 72 h at transition from intravenous to subcutaneous insulin. Mean serum glucose values were significantly lower in the CL pump group than in the control group (111 ± 4 vs. 130 ± 13 mg/dL; p = 0.003) without increased risk of hypoglycemia (percentage of time <70 mg/dL: CL pump 1.9%, control 4.8%; p = 0.46). Results from this pilot study suggest that CL therapy is superior to conventional therapy in maintaining euglycemia without increased hypoglycemia. This technology shows significant promise to safely maintain euglycemic targets during the period of islet engraftment following islet transplantation.


Assuntos
Glicemia/análise , Hipoglicemia/prevenção & controle , Transplante das Ilhotas Pancreáticas , Pâncreas Artificial , Pancreatectomia , Pancreatite Crônica/terapia , Adulto , Estudos de Casos e Controles , Feminino , Seguimentos , Rejeição de Enxerto , Sobrevivência de Enxerto , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Complicações Pós-Operatórias , Prognóstico , Fatores de Risco , Transplante Autólogo , Adulto Jovem
10.
J Public Health (Oxf) ; 38(2): 206-11, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-25968133

RESUMO

BACKGROUND: Fuel poverty negatively impacts a population's health affecting life chances along the life course. Moreover, it represents a substantial inequality in the UK. Healthcare practitioners (HCPs) have a key role in identifying and supporting patients who are fuel poor. METHODS: A qualitative inquiry with District Nurses and General Practitioners, to explore their understanding and experiences of dealing with patients living in fuel poverty. RESULTS: Participants recognize fuel poverty by observing material cues. They perceive their relationship with the patient as pivotal to recognizing the fuel poor. Practitioners' sense of responsibility for their patients' social concerns is determined by their knowledge about the link to health outcomes. The services that they sign-post to are motivated by their experience dealing with the service, or their patients' experiences of the service. CONCLUSION: Participants' reliance on temporary material cues resulted in few experiences of recognition of the fuel poor. HCPs' perceptions of patient pride and the lack of personal relationship between doctor and patient presented barriers to identifying fuel poor patients. A limitation of this study is the small sample size of nine participants. These came from two professional groups, which afforded more depth of exploration, but may limit applicability to other professionals.


Assuntos
Calefação , Relações Enfermeiro-Paciente , Relações Médico-Paciente , Pobreza , Humanos , Entrevistas como Assunto , Petróleo/economia , Problemas Sociais/economia , Problemas Sociais/psicologia , Reino Unido
11.
Am J Transplant ; 15(7): 1991-4, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25765064

RESUMO

Total pancreatectomy with islet autotransplantation (TPIAT) is performed for definitive treatment of chronic pancreatitis; patients are not diabetic before surgery, or have C-peptide positive pancreatogenous diabetes. Thus, TPIAT recipients are not traditionally considered at risk for autoimmune loss of the islet graft. We describe a 43-year-old female who underwent TPIAT with high mass islet graft of 6031 IEQ/kg, with no evidence of presurgical ß cell autoimmunity who developed type 1 diabetes within the first year after TPIAT, resulting in complete loss of beta cell function. The patient had positive GAD and insulin autoantibodies at 1 year and 18 months after TPIAT, not present prior, and undetectable C-peptide after mixed meal and intravenous glucose tolerance testing at 18 months. Glucagon secretion was preserved, suggesting the transplanted alpha cell mass was intact. HLA typing revealed a DR3/DR4 class II haplotype. This case highlights the need to consider de novo type 1 diabetes in patients with unexpected islet graft failure after TPIAT.


Assuntos
Autoimunidade , Diabetes Mellitus Tipo 1/cirurgia , Rejeição de Enxerto/etiologia , Células Secretoras de Insulina/patologia , Transplante das Ilhotas Pancreáticas/efeitos adversos , Pancreatectomia/efeitos adversos , Adulto , Diabetes Mellitus Tipo 1/complicações , Feminino , Rejeição de Enxerto/metabolismo , Rejeição de Enxerto/patologia , Sobrevivência de Enxerto , Humanos , Complicações Pós-Operatórias , Prognóstico , Fatores de Risco , Transplante Autólogo
12.
Intern Med J ; 45(8): 860-3, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25871923

RESUMO

BACKGROUND: Statins are very effective in reducing coronary disease and ischaemic stroke but guidelines although evolving have not been clear on statin dose. AIM: To audit and review community statin prescribing. METHODS: A retrospective audit of the type and dose of statin dispensed was undertaken at five pharmacies in and around Perth, the capital city of Western Australia. Patients were de-identified. RESULTS: Statins made up 6.5% of all prescriptions. Statin dose when adjusted for different potency effectively varied 64-fold between patients. Rosuvastatin and atorvastatin accounted for 79% of prescriptions, at a mean dose of 10 times the effective dose 50. CONCLUSION: The extraordinarily wide variation in statin dose is at odds with the more consistent doses of other drugs used in the management of arterial disease. Unnecessarily high statin dosing increases side-effects and may not improve clinical outcomes appreciably. Rational prescribing of statins based on the pharmacodynamic evidence, with lower doses in most patients, combined with close attention to reduction of smoking, blood pressure and weight, is likely to reduce arterial disease most efficiently and safely.


Assuntos
Prescrições de Medicamentos/estatística & dados numéricos , Inibidores de Hidroximetilglutaril-CoA Redutases/administração & dosagem , Padrões de Prática Médica/estatística & dados numéricos , Atenção Primária à Saúde/estatística & dados numéricos , Doença das Coronárias/prevenção & controle , Humanos , Estudos Retrospectivos , Acidente Vascular Cerebral/prevenção & controle , Austrália Ocidental
13.
Am J Physiol Lung Cell Mol Physiol ; 306(3): L284-91, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24318115

RESUMO

The cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel inhabits the apical membrane of airway epithelia, where its function is essential for mucus hydration, mucociliary clearance, and airway defense. Chronic obstructive pulmonary disease (COPD), most often a consequence of cigarette smoke (CS) exposure, affects 15 million persons in the US. Clinically, COPD is characterized by many of the salient features of cystic fibrosis lung disease, where CFTR is either absent or reduced in function. CS is an acidic aerosol (pH 5.3 to 6.3) reported to contain over 4,000 constituents. Acute CS exposure has been reported to decrease airway transepithelial voltage in vivo and short-circuit current in vitro; however, the mechanistic basis of these effects is uncertain. The goal of the studies described here was to develop a bioassay to characterize the effects of aqueous CS preparations on the channel function of CFTR. We studied aqueous CS extract (CSE) prepared in our laboratory, as well as commercial cigarette smoke condensate (CSC) in Xenopus oocytes expressing human CFTR. Application of CSE at pH 5.3 produced a reversible, voltage-dependent inhibition of CFTR conductance. CSE neutralized to pH 7.3 produced less inhibition of CFTR conductance. Serial dilution of CSE revealed a dose-dependent effect at acidic and neutral pH. In contrast, CSC did not inhibit CFTR conductance in oocytes. We conclude that one or more components of CSE inhibits CFTR in a manner similar to diphenylamine-2-carboxylate, a negatively charged, open-channel blocker.


Assuntos
Regulador de Condutância Transmembrana em Fibrose Cística/antagonistas & inibidores , Doença Pulmonar Obstrutiva Crônica/fisiopatologia , Fumaça , Animais , Humanos , Oócitos/metabolismo , Nicotiana , Xenopus laevis
14.
Biofouling ; 30(10): 1175-82, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25397362

RESUMO

In the present study, the efficacy of generally recognised as safe (GRAS) antimicrobial plant metabolites in regulating the growth of Staphylococcus aureus and S. epidermidis was investigated. Thymol, carvacrol and eugenol showed the strongest antibacterial action against these microorganisms, at a subinhibitory concentration (SIC) of ≤ 50 µg ml(-1). Genistein, hydroquinone and resveratrol showed antimicrobial effects but with a wide concentration range (SIC = 50-1,000 µg ml(-1)), while catechin, gallic acid, protocatechuic acid, p-hydroxybenzoic acid and cranberry extract were the most biologically compatible molecules (SIC ≥ 1000 µg ml(-1)). Genistein, protocatechuic acid, cranberry extract, p-hydroxybenzoic acid and resveratrol also showed anti-biofilm activity against S. aureus, but not against S. epidermidis in which, surprisingly, these metabolites stimulated biofilm formation (between 35% and 1,200%). Binary combinations of cranberry extract and resveratrol with genistein, protocatechuic or p-hydroxibenzoic acid enhanced the stimulatory effect on S. epidermidis biofilm formation and maintained or even increased S. aureus anti-biofilm activity.


Assuntos
Antibacterianos/farmacologia , Biofilmes/efeitos dos fármacos , Extratos Vegetais/farmacologia , Staphylococcus/efeitos dos fármacos , Biofilmes/crescimento & desenvolvimento , Genisteína/farmacologia , Hidroxibenzoatos/farmacologia , Testes de Sensibilidade Microbiana , Resveratrol , Dermatopatias Bacterianas/tratamento farmacológico , Infecções Estafilocócicas/tratamento farmacológico , Estilbenos/farmacologia , Vaccinium macrocarpon/química
15.
J Dairy Sci ; 97(8): 4955-72, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24881785

RESUMO

Absorption of glucose from the lumen of the intestine into enterocytes is accomplished by sodium-glucose co-transporter 1 (SGLT1). In the majority of mammalian species, expression (this includes activity) of SGLT1 is upregulated in response to increased dietary monosaccharides. This regulatory pathway is initiated by sensing of luminal sugar by the gut-expressed sweet taste receptor. The objectives of our studies were to determine (1) if the ruminant intestine expresses the sweet taste receptor, which consists of two subunits [taste 1 receptor 2 (T1R2) and 3 (T1R3)], and other key signaling molecules required for SGLT1 upregulation in nonruminant intestines, and (2) whether T1R2-T1R3 sensing of artificial sweeteners induces release of glucagon-like peptide-2 (GLP-2) and enhances SGLT1 expression. We found that the small intestine of sheep and cattle express T1R2, T1R3, G-protein gustducin, and GLP-2 in enteroendocrine L-cells. Maintaining 110-d-old ruminating calves for 60d on a diet containing a starter concentrate and the artificial sweetener Sucram (consisting of saccharin and neohesperidin dihydrochalcone; Pancosma SA, Geneva, Switzerland) enhances (1) Na(+)-dependent d-glucose uptake by over 3-fold, (2) villus height and crypt depth by 1.4- and 1.2-fold, and (3) maltase- and alkaline phosphatase-specific activity by 1.5-fold compared to calves maintained on the same diet without Sucram. No statistically significant differences were observed for rates of intestinal glucose uptake, villus height, crypt depth, or enzyme activities between 50-d-old milk-fed calves and calves maintained on the same diet containing Sucram. When adult cows were kept on a diet containing 80:20 ryegrass hay-to-concentrate supplemented with Sucram, more than a 7-fold increase in SGLT1 protein abundance was noted. Collectively, the data indicate that inclusion of this artificial sweetener enhances SGLT1 expression and mucosal growth in ruminant animals. Exposure of ruminant sheep intestinal segments to saccharin or neohesperidin dihydrochalcone evokes secretion of GLP-2, the gut hormone known to enhance intestinal glucose absorption and mucosal growth. Artificial sweeteners, such as Sucram, at small concentrations are potent activators of T1R2-T1R3 (600-fold>glucose). This, combined with oral bioavailability of T1R2-T1R3 and the understanding that artificial sweetener-induced receptor activation evokes GLP-2 release (thus leading to increased SGLT1 expression and mucosal growth), make this receptor a suitable target for dietary manipulation.


Assuntos
Glucose/farmacocinética , Mucosa Intestinal/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Edulcorantes/administração & dosagem , Paladar , Ração Animal , Animais , Bovinos , Dieta/veterinária , Peptídeo 2 Semelhante ao Glucagon/genética , Peptídeo 2 Semelhante ao Glucagon/metabolismo , Absorção Intestinal/efeitos dos fármacos , Mucosa Intestinal/efeitos dos fármacos , Intestinos/efeitos dos fármacos , Receptores Acoplados a Proteínas G/genética , Ruminantes/metabolismo , Ovinos , Transportador 1 de Glucose-Sódio/genética , Transportador 1 de Glucose-Sódio/metabolismo , Suíça , Transducina/genética , Transducina/metabolismo , Regulação para Cima
16.
Reprod Domest Anim ; 49(2): 254-62, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24467598

RESUMO

Apoptosis in the testis is required to ensure an efficient spermatogenesis. However, sometimes, defective germ cells that are marked for elimination during this process escape elimination in the testes, giving rise to ejaculates with increased percentages of abnormal and apoptotic spermatozoa and a high percentage of apoptotic bodies. Apoptosis markers in the ejaculate have been associated with low fertility, either in animals or humans. Therefore, the goal of this study was to investigate whether fresh equine semen contains apoptotic bodies [initially named Merocyanine 540 (M540) bodies] and to study the relationship between the quantity of these bodies and cell concentration, the volume of ejaculate, viability and motility. Moreover, we also studied whether the presence apoptotic bodies in fresh semen was related to the resistance of the stallion spermatozoa to being incubated at 37 °C or being frozen and thawed. Fresh equine semen was stained with fluorescent dyes such as M540 and Annexin-V. Active Caspase 3 was studied in fresh semen through Western blotting and immunofluorescence with a specific antibody. Sperm kinematics was assessed in fresh, incubated and thawed samples using computer-assisted semen analysis, and viability was evaluated with the LIVE/DEAD Sperm Viability Kit. Overall, our results demonstrate for the first time the presence of apoptotic bodies in equine semen. The quantity of apoptotic bodies was highly variable among stallions and was positively correlated with Caspase 3 activity in fresh samples and negatively correlated with the viability and motility of stallion spermatozoa after the cryopreservation process.


Assuntos
Apoptose/fisiologia , Cavalos/fisiologia , Análise do Sêmen/veterinária , Sêmen/fisiologia , Adulto , Animais , Criopreservação/métodos , Criopreservação/veterinária , Humanos , Masculino , Preservação do Sêmen/métodos , Preservação do Sêmen/veterinária , Motilidade dos Espermatozoides , Espermatozoides/fisiologia , Adulto Jovem
17.
Am J Transplant ; 13(10): 2664-71, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23924045

RESUMO

Islet autotransplant (IAT) may ameliorate postsurgical diabetes following total pancreatectomy (TP), but outcomes are dependent upon islet mass, which is unknown prior to pancreatectomy. We evaluated whether preoperative metabolic testing could predict islet isolation outcomes and thus improve assessment of TPIAT candidates. We examined the relationship between measures from frequent sample IV glucose tolerance tests (FSIVGTT) and mixed meal tolerance tests (MMTT) and islet mass in 60 adult patients, with multivariate logistic regression modeling to identify predictors of islet mass ≥2500 IEQ/kg. The acute C-peptide response to glucose (ACRglu) and disposition index from FSIVGTT correlated modestly with the islet equivalents per kilogram body weight (IEQ/kg). Fasting and MMTT glucose levels and HbA1c correlated inversely with IEQ/kg (r values -0.33 to -0.40, p ≤ 0.05). In multivariate logistic regression modeling, normal fasting glucose (<100 mg/dL) and stimulated C-peptide on MMTT ≥4 ng/mL were associated with greater odds of receiving an islet mass ≥2500 IEQ/kg (OR 0.93 for fasting glucose, CI 0.87-1.0; OR 7.9 for C-peptide, CI 1.75-35.6). In conclusion, parameters obtained from FSIVGTT correlate modestly with islet isolation outcomes. Stimulated C-peptide ≥4 ng/mL on MMTT conveyed eight times the odds of receiving ≥2500 IEQ/kg, a threshold associated with reasonable metabolic control postoperatively.


Assuntos
Glicemia/metabolismo , Diabetes Mellitus Tipo 1/prevenção & controle , Transplante das Ilhotas Pancreáticas , Ilhotas Pancreáticas/metabolismo , Pancreatectomia , Pancreatite Crônica/cirurgia , Complicações Pós-Operatórias/prevenção & controle , Adulto , Peptídeo C/análise , Feminino , Seguimentos , Teste de Tolerância a Glucose , Humanos , Masculino , Cuidados Pré-Operatórios , Prognóstico , Estudos Prospectivos , Fatores de Risco , Transplante Autólogo
18.
Int J Obes (Lond) ; 37(3): 420-3, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22508338

RESUMO

OBJECTIVE: In obesity, adipose tissue becomes a significant source of chemokines and inflammatory cytokines that are associated with chronic systemic low-grade inflammation and may lead to insulin resistance. Studies in children have mainly focused on inflammatory cytokines and there are limited data for chemokines in adolescents and young adults. We studied the relation of chemokines to cardiovascular (CV)-risk factors, insulin resistance and adipocytokines in 18-21-year-old individuals. SUBJECTS AND DESIGN: Cross-sectional data collected in a cohort originally enrolled at mean age 13, with data for the present study obtained from 252 examined at age 18.7±0.1 years. METHODS: Multiple linear regression models were used to analyze the associations among chemokines (monocyte chemotactic protein-1, macrophage inflammatory protein-1ß (MIP-1ß), visfatin and interleukin-8 (IL-8)) and between chemokines and body mass index (BMI), glucose, lipids, blood pressure (BP), insulin resistance (euglycemic hyperinsulinemic clamp) and adipocytokines (IL-6, TNF-α and adiponectin). RESULTS: Chemokine levels were significantly intercorrelated. Significant associations (P<0.05) with adjustment for age, race and sex included: MIP-1ß with waist circumference and IL-6, IL-8 with systolic BP and visfatin with IL-6. No other significant relations were found between the chemokines and the other variables. Further adjustment for BMI did not alter these conclusions. CONCLUSION: Considered in the context of prior studies in children and adults, these results suggest that in large part, the association between chemokines and CV risk or inflammatory factors does not appear to develop until adult life.


Assuntos
Adipocinas/sangue , Doenças Cardiovasculares/sangue , Quimiocinas/sangue , Resistência à Insulina , Obesidade/sangue , Adolescente , Biomarcadores/sangue , Glicemia/metabolismo , Pressão Sanguínea , Índice de Massa Corporal , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/etiologia , Quimiocina CCL4/sangue , Estudos Transversais , Feminino , Técnica Clamp de Glucose , Humanos , Inflamação/sangue , Interleucina-6/sangue , Interleucina-8/sangue , Lipídeos/sangue , Masculino , Nicotinamida Fosforribosiltransferase/sangue , Obesidade/complicações , Obesidade/epidemiologia , Fatores de Risco , Fator de Necrose Tumoral alfa/sangue , Estados Unidos/epidemiologia , Adulto Jovem
19.
JAMA ; 310(6): 591-608, 2013 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-23842577

RESUMO

IMPORTANCE: Understanding the major health problems in the United States and how they are changing over time is critical for informing national health policy. OBJECTIVES: To measure the burden of diseases, injuries, and leading risk factors in the United States from 1990 to 2010 and to compare these measurements with those of the 34 countries in the Organisation for Economic Co-operation and Development (OECD) countries. DESIGN: We used the systematic analysis of descriptive epidemiology of 291 diseases and injuries, 1160 sequelae of these diseases and injuries, and 67 risk factors or clusters of risk factors from 1990 to 2010 for 187 countries developed for the Global Burden of Disease 2010 Study to describe the health status of the United States and to compare US health outcomes with those of 34 OECD countries. Years of life lost due to premature mortality (YLLs) were computed by multiplying the number of deaths at each age by a reference life expectancy at that age. Years lived with disability (YLDs) were calculated by multiplying prevalence (based on systematic reviews) by the disability weight (based on population-based surveys) for each sequela; disability in this study refers to any short- or long-term loss of health. Disability-adjusted life-years (DALYs) were estimated as the sum of YLDs and YLLs. Deaths and DALYs related to risk factors were based on systematic reviews and meta-analyses of exposure data and relative risks for risk-outcome pairs. Healthy life expectancy (HALE) was used to summarize overall population health, accounting for both length of life and levels of ill health experienced at different ages. RESULTS: US life expectancy for both sexes combined increased from 75.2 years in 1990 to 78.2 years in 2010; during the same period, HALE increased from 65.8 years to 68.1 years. The diseases and injuries with the largest number of YLLs in 2010 were ischemic heart disease, lung cancer, stroke, chronic obstructive pulmonary disease, and road injury. Age-standardized YLL rates increased for Alzheimer disease, drug use disorders, chronic kidney disease, kidney cancer, and falls. The diseases with the largest number of YLDs in 2010 were low back pain, major depressive disorder, other musculoskeletal disorders, neck pain, and anxiety disorders. As the US population has aged, YLDs have comprised a larger share of DALYs than have YLLs. The leading risk factors related to DALYs were dietary risks, tobacco smoking, high body mass index, high blood pressure, high fasting plasma glucose, physical inactivity, and alcohol use. Among 34 OECD countries between 1990 and 2010, the US rank for the age-standardized death rate changed from 18th to 27th, for the age-standardized YLL rate from 23rd to 28th, for the age-standardized YLD rate from 5th to 6th, for life expectancy at birth from 20th to 27th, and for HALE from 14th to 26th. CONCLUSIONS AND RELEVANCE: From 1990 to 2010, the United States made substantial progress in improving health. Life expectancy at birth and HALE increased, all-cause death rates at all ages decreased, and age-specific rates of years lived with disability remained stable. However, morbidity and chronic disability now account for nearly half of the US health burden, and improvements in population health in the United States have not kept pace with advances in population health in other wealthy nations.


Assuntos
Doença Crônica/mortalidade , Efeitos Psicossociais da Doença , Nível de Saúde , Expectativa de Vida , Ferimentos e Lesões/mortalidade , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Países Desenvolvidos/estatística & dados numéricos , Pessoas com Deficiência/estatística & dados numéricos , Feminino , Saúde Global , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Morbidade , Mortalidade Prematura , Fatores de Risco , Estados Unidos/epidemiologia
20.
J Environ Manage ; 122: 1-7, 2013 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-23524371

RESUMO

The present study examines the effect of the organic loading rate and the configuration of a semi-pilot modular microbial electrolysis cell (MEC) on the energy consumption during domestic (dWW) wastewater treatment. The MEC reactor consisted of twin tubular units hydraulically connected in series and was able to reduce up to 85% of the chemical oxygen demand (COD) concentration of the influent dWW at a relatively low energy consumption (1.6 kW h kg-COD(-1)). Hydrogen production was limited by the reduced amounts of organic matter fed into the reactor and the poor performance of the cathode. Overall, the results identified both an organic loading rate (OLR) threshold that makes the use of MECs for dWW treatment feasible in terms of energy consumption and COD removal efficiency and an OLR threshold that justifies the operation of two MECs in series to provide the required degree of COD removal.


Assuntos
Eletrólise/métodos , Eliminação de Resíduos Líquidos/métodos , Águas Residuárias/microbiologia , Análise da Demanda Biológica de Oxigênio , Reatores Biológicos/microbiologia
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