Exogenous γ-aminobutyric acid treatment improves the cold tolerance of zucchini fruit during postharvest storage.

This work examines the effect of a treatment with 1 mM of γ-aminobutyric acid (GABA) on zucchini fruit during postharvest cold storage. Specifically, the effect of GABA on postharvest quality was measured, as well as its implication in the GABA shunt and other related metabolic pathways. The treatments were performed in Sinatra, a variety of zucchini highly sensitive to low-temperature storage. The application of GABA improved the quality of zucchini fruit stored at 4 °C, with a reduction of chilling-injury index, weight loss, and cell death, as well as a lower rate of electrolyte leakage. GABA content was significantly higher in the treated fruit than in the control fruit at all times analyzed. At the end of the storage period, GABA-treated fruit had higher contents of both proline and putrescine. The catabolism of this polyamine was not affected by exogenous GABA. Also, over the long term, the treatment induced the GABA shunt by increasing the activities of the enzymes GABA transaminase (GABA-T) and glutamate decarboxylase (GAD). GABA-treated fruit contained higher levels of fumarate and malate than did non-treated fruit, as well as higher ATP and NADH contents. These results imply that the GABA shunt is involved in providing metabolites to produce energy, reduce power, and help the fruit to cope with cold stress over the long term.

Knowledge and attitudes of low back pain in physicians based in clinical practice guidelines / Conhecimento e conduta em casos de lombalgia com base nas diretivas de prática clínica / Conocimientos y actitudes sobre lumbalgia de médicos basados en la guía práctica clínica

Objective: To determine the level of knowledge and attitudes of physicians in Tijuana based on Clinical Practice Guidelines (CPG) for the prevention, diagnosis and treatment of Nonspecific Low Back Pain (NLBP). Methods: Prospective, cross-sectional, descriptive study. Data were obtained from doctors who practice in clinics, private surgeries, and/or government institutions. Results: Of a total of 56 doctors surveyed, 37 were men and 19 women. None of the doctors said they had not seen a patient with Back Pain. 49% knew the GPC, and 51% did not know of its existence. Conclusions: Although some physicians reported knowledge of the GPC, according to the results, there was a lack of full knowledge of, and adherence to these guidelines. Not knowing the GPC did not make it impossible to complete the questionnaire. The doctors felt more connected to the health system, but with less confidence in the management of cases of NLBP.

Objetivo: Determinar o nível de conhecimentos e a conduta dos médicos de Tijuana, com base nas Diretivas de Prática Clínica (DPC) para prevenção, diagnóstico e tratamento da dor lombar não específica (DLNE). Métodos: Estudo prospectivo, transversal e descritivo. Os dados foram obtidos junto a médicos que prestam serviços em clínicas, consultórios particulares e/ou instituições governamentais. Resultados: Atingiu-se um total de 56 médicos entrevistados, dos quais 37 eram homens e 19 mulheres. Nenhum médico disse que não atende um paciente com dor lombar. Do total, 49% conhecem as DPC e 51% não sabiam da sua existência. Conclusões: Apesar de alguns médicos relatarem conhecer as DPC, de acordo com os resultados obtidos, falta-lhes maior domínio e conformidade com relação a essas diretivas. Não conhecer as DPC não impossibilita responder ao questionário. Os médicos sentem-se mais conectados ao sistema de saúde, mas com menos confiança na conduta em casos DLI.

Objetivo: Determinar el nivel de conocimientos y las actitudes de los médicos en Tijuana, con base en la Guía de Práctica Clínica (GPC) para la prevención, diagnóstico y tratamiento del Dolor Lumbar Inespecífico (DLI). Métodos: Estudio prospectivo, transversal y descriptivo. Los datos fueron obtenidos de los médicos que prestan sus servicios en clínicas, consultorios privados y/o instituciones de gobierno. Resultados: Se obtuvo un total de 56 médicos encuestados, 37 hombres y 19 mujeres. Ningún médico contestó que no atiende un paciente con dolor lumbar. El 49% conocen la GPC y el 51% no saben de su existencia. Conclusiones: A pesar de que algunos médicos refieren conocer la GPC, según los resultados obtenidos falta mayor dominio y apego de la misma. El no conocer la GPC no hace imposible contestar el cuestionario. Los médicos se sienten más conectados con el sistema de salud, pero con menor autoconfianza en el manejo del DLI.