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Metabolic Rate - Crossref

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Last Updated: 23 April 2022

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Glioma surgery using a multimodal navigation system with integrated metabolic images

For glioma surgery, a multimodal neuronavigation device based on metabolic images with PET and anatomical images from MR images is illustrated here. Methods Thirty-three patients with cerebral glioma underwent 36 operations with the assistance of either a multimodal or conventional navigation system. The multimodal navigation system proved to be more effective than the conventional navigation system in determining the area to be resected by displaying a more definite tumor boundary, particularly in cases of recurrent tumors that had not established a normal gyral pattern. The multimodal navigation device was also more efficient than the traditional navigation device in reducing the mass of the tumor remnants in the resectable portion of the tumor remnants. The multimodal navigation system-guided surgery improved patient survival by a significant amount more than the conventional navigation-guided surgery method.

Source link: https://doi.org/10.3171/2008.4.17569


Effect of hyperoxia on cerebral metabolic rate for oxygen measured using positron emission tomography in patients with acute severe head injury

Object Description According to recent reports, traumatic brain injury may be correlated with mitochondrial dysfunction. Patients with a TBI have been referred to a great deal in the potential use of ventilation with 100% oxygen to treat patients with TBIs. The authors directly measured the cerebral respiratory rate for oxygen with positron emission tomography before and after ventilation with 100% oxygen to determine if normobaric hyperoxia elevates brain oxygen metabolism following acute TBI. Methods Baseline measurements of arterial and jugular venous blood gases, mean arterial blood pressure, cerebral blood flow, cerebral blood supply, oxygen extraction percentage, and CMRO 2 were estimated at baseline, despite the patients receiving ventilation with a fraction of inspired oxygen from 0. 3 to 0. 5 percent. Conclusions: Normobaric hyperoxia did not improve brain oxygen metabolism, not improved brain oxygen metabolism, according to the authors.

Source link: https://doi.org/10.3171/jns.2007.106.4.526


Cardiac contractility modulation ameliorates myocardial metabolic remodeling in a rabbit model of chronic heart failure through activation of AMPK and PPAR-α pathway

In the rabbit model with HF, we investigated the effects of cardiac contractility modulation on myocardial metabolic remodeling. By periodic acid-Schiff and Oil Red O staining, we found the accumulation of glycogen and lipid droplets in myocardial tissues. We compared glucose, free fatty acid, lactic acid, pyruvate, and adenosine triphosphate levels in myocardial tissues using corresponding kits and the expression levels of key factors influencing myocardial substrate uptake and usage by western blotting. With HF, CCM has significantly improved the cardiac architecture and function in the rabbit model. The accumulation of glycogen and lipid droplets in CCM therapy has also reduced. With CCM therapy, protein synthesis was noticeably enhanced, as demonstrated by more activating adenosine monophosphate-activated protein kinase and peroxisome proliferator-mediated receptor receptor- signaling pathways.

Source link: https://doi.org/10.1515/med-2022-0415


Septuagenarians Approach 4 Times the Basal Metabolic Rate During Race Across America

Historical studies have shown that Tour de France riders have average daily energy expenditures of between 3. 5 and 5. 5 percent above the basal metabolic rate. In comparison, TDEE for healthy male septuagenarians has been reported to be 1. 3 to 2. 0 percent. During the cross-continent cycling Race Across America, measure the TDEE and water efflux during ultraendurance employment in an older population. Methods: Before beginning the Race Across America for TDEE estimation, a 4-man septuagenarian team received an oral dose of doubly labeled water. Nude body mass measurements were also compared to urine samples obtained. During the race, water efflux averaged 10. 2 L 24 h 1 resulting in a total turnover of 45. 3 L, equal to 1. 5 times total body water during the run. These values are twice those of previously observed healthy but less active septuagenarian men and are comparable to professional riders during portions of the Tour de France.

Source link: https://doi.org/10.1123/ijspp.2021-0309


Critical metabolic pathways and SAD/FADs, WRI1s, and DGATs cooperate for high-oleic acid oil production in developing oil tea ( Camellia oleifera) seeds

Abstract Oil tea trees grow high-quality edible oils with deceptively high oleic acid and low linolenic and linoleic fatty acid levels, but a significant obstacle in producing high-yield and quality oil tea varieties has been a lack of knowledge of tea oil biosynthesis and regulation. We dissected the essential metabolic pathways including glycolysis, fatty acid, and triacylglycerol biosynthesis, as well as genes that are important for tea seed oil production by integrating metabolite and transcriptome studies of the developing oil tea seeds. Two diacylglycerols O-acyltransferases that may prefer to synthesize 18:1-TAG were clinically tested and may have been equally relevant for high 18:1-TAG production. This report provides an in depth insight into the production of tea seed oils and determination of genes that may be used as molecular markers to breed oil tea varieties with higher oil yield and quality.

Source link: https://doi.org/10.1093/hr/uhac087

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions