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Strawberry is one of the most popular fruits because of its sensorial and functional properties. However, strawberry crop is sensitive to salt stress conditions. Despite plants have plasticity, high salt concentrations induce molecular, biochemical, and physiological responses in plants. There is evidence that the abscisic acid (ABA) hormone acts as a signaling molecule under stress conditions; however, the molecular mechanisms involved in the synthesis and homeostasis of ABA and in the induction of phytochemical antioxidant compounds under stress conditions remain unclear. In this study, the effect of stress induced by NaCl (salt stress - SS), with or without the simultaneous application of ABA, on the ABA, phenylpropanoids and L-ascorbic acid (AsA) metabolisms were evaluated. The physiological aspects (Na, Cl and proline concentration, photosynthetic variables) were also studied. The results showed that salt stress increases the Na and Cl content in the leaves, affects photosynthetic variables and triggers the production of proline, pelargonidin-3-O-glucoside, total phenolic compounds and AsA content, alongside the upregulation of several genes from the phenylpropanoid and flavonoid pathways. These effects were accompanied by the induction of compounds and transcripts related to ABA biosynthesis, conjugation and catabolism. Otherwise, the exogenous application of ABA in salt stressed plants promotes a shift in gene expression and metabolism to mitigate the stress. Therefore, salt stress affects the metabolism of ABA, phenylpropanoids and AsA in strawberry increasing phytochemical composition which is strongly associated with an ABA-dependent mechanism.
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PURPOSE: To verify the minimal proximal and distal residual diameters by quantitative digital angiography and intravascular ultrasound, after the implantation of the intracoronary prosthesis. METHODS: We studied twenty patients with coronary atherosclerosis, ages ranging from 40 to 77 (56.7 +/- 10) years, 13 (65%) were male. Patients with eccentric obstructive atherosclerotic lesions of 70% or more in the proximal third of the anterior descendent, circumflex, or right coronary arteries received a stent implant as treatment for the obstruction. RESULTS: The mean proximal minimal residual diameters assessed by digital angiography were 3.32 +/- 0.33 mm and by ultrasound 3.08 +/- 0.31 mm (p < 0.05); the distal diameters by angiography were 3.33 +/- 0.37 mm and by ultrasound 3.05 +/- 0.39 mm (p < 0.05). Therefore, the measurements by ultrasound were always smaller. There is a significant linear correlation between measurements by angiography and ultrasound for both proximal (r = 0.92; p < 0.0001) and distal diameters (r = 0.91; p < 0.0001). The determination coefficient was 84% for proximal diameters and 87% for distal diameters. Therefore, the proximal diameters variate 16% and distal diameters 13% between both methods, due to the peculiarities of each method. CONCLUSION: Both methods correlate adequately, concerning to the measurements; the methods are interdependent, determining with the same accuracy intracoronary diameters in most cases studied; ultrasound is a safe and feasible technical resource for the evaluation of intravascular structures; the intravascular ultrasound system can contribute for the direct analysis inside the vascular structure, immediately after intracoronary stent implanting.
Assuntos
Doença da Artéria Coronariana/cirurgia , Stents , Adulto , Idoso , Angiografia Digital , Cateterismo Cardíaco , Doença da Artéria Coronariana/diagnóstico por imagem , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , UltrassonografiaRESUMO
E feita da literatura sobre o autotransplante de paratiroide e os autores sugerem a utilizacao deste procedimento para evitar o hipoparatireoidismo pos-tireoidectomias totais
Assuntos
Humanos , Hipoparatireoidismo , Glândulas Paratireoides , Tireoidectomia , Transplante AutólogoRESUMO
Os autores, com base num estudo de randomizacao de retalhos em ratos que comprova que, nestes animais, o tempo de formacao do pediculo secundario e de, aproximadamente nove dias, acreditam poder-se pressupor que, no homem, este tempo seja menor do ate entao utilizado