Evaluation of Oxidative Stress and Metabolic Profile in a Preclinical Kidney Transplantation Model According to Different Preservation Modalities.

This study addresses a joint nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) spectroscopy approach to provide a platform for dynamic assessment of kidney viability and metabolism. On porcine kidney models, ROS production, oxidative damage kinetics, and metabolic changes occurring both during the period between organ retrieval and implantation and after kidney graft were examined. The 1H-NMR metabolic profile—valine, alanine, acetate, trimetylamine-N-oxide, glutathione, lactate, and the EPR oxidative stress—resulting from ischemia/reperfusion injury after preservation (8 h) by static cold storage (SCS) and ex vivo machine perfusion (HMP) methods were monitored.

Acute Effects of Triathlon Race on Oxidative Stress Biomarkers.

The response to strenuous exercise was investigated by reactive oxygen species (ROS) production, oxidative damage, thiol redox status, and inflammation assessments in 32 enrolled triathlon athletes (41.9 ± 7.9 yrs) during Ironman® (IR), or half Ironman® (HIR) competition.

R(+)-Thioctic Acid Effects on Oxidative Stress and Peripheral Neuropathy in Type II Diabetic Patients: Preliminary Results by Electron Paramagnetic Resonance and Electroneurography.

Objectives: Diabetic neuropathy is the most common complication of diabetes. The idea of alterations in energy metabolism in diabetes is emerging. The biogenic antioxidant R(+)-thioctic acid has been successfully used in the treatment of diabetic polyneuropathic (DPN) patients.

Structural and Nutritional Properties of Pasta from Triticum monococcum and Triticum durum Species. A Combined ¹H NMR, MRI, and Digestibility Study.

The aim of the present study was to characterize the structure of two different types of pasta, namely Triticum turgidum ssp. durum (cv. Saragolla) and Triticum monococcum ssp.

Structural characterization of recombinant human myoglobin isoforms by (1)H and (129)Xe NMR and molecular dynamics simulations.

Myoglobin (Mb), the main cytosolic oxygen storage/deliver protein, is also known to interact with different small ligands exerting other fundamental physiological roles. In Humans up to five different Mb isoforms are present. The two most expressed ones (>90%) differ only at the 54th position, K54 (Mb-I) and E54 (Mb-II) respectively.

A quantitative method to assess muscle tissue oxygenation in vivo by monitoring 1H nuclear magnetic resonance myoglobin resonances.

A nuclear magnetic resonance (NMR) method was implemented to assess in vivo oxygenation levels by a quantitative determination of the 1H NMR myoglobin (Mb) resonances. The proximal His-F8 NdeltaH at 70-90 ppm and Val-E11 gammaCH3 resonance at -2.8 ppm, reflecting deoxygenated (deoxy-Mb) and oxygenated (met-Mb) states, were alternately recorded.

Osmotic and aging effects in caviar oocytes throughout water and lipid changes assessed by 1H NMR T1 and T2 relaxation and MRI.

By combining NMR relaxation spectroscopy and magnetic resonance imaging techniques, unsalted (us) and salted (s) caviar (Acipenser transmontanus) oocytes were characterized over a storage period of up to 90 days. The aging and the salting effects on the two major cell constituents, water and lipids, were separately assessed. T1 and T2 decays were interpreted by assuming a two-site exchange model.

Monitoring the effects of storage in caviar from farmed Acipenser transmontanus using chemical, SEM, and NMR methods.

The effects of storage at 4 degrees C on the quantity and quality of chemical components in the caviar from farmed Acipenser transmontanus have been analyzed by SEM, chemical methods, and NMR and MRI techniques. Particular attention has been focused on the lipid components, the distribution and mobility of which were strongly affected by the storage time. MRI and relaxation data indicated that lipids are endowed with two different mobility regimes, one slow (short T1) and one fast (long T1), both lengthening with the storage time.

Temperature and pH dependence of energy balance by (31)P- and (1)H-MRS in anaerobic frog muscle.

The temperature (T)-dependence of energy consumption of resting anaerobic frog gastrocnemii exposed to different, changing electrochemical gradients was assessed. To this aim, the rate of ATP resynthesis (delta approximately P/deltat) was determined by (31)P- and (1)H-MRS as the sum of the rates of PCr hydrolysis (delta[PCr]/deltat) and of anaerobic glycolysis (delta[La]/ deltat, based on a approximately P/La ratio of 1.5).

Effects of temperature and extracellular pH on metabolites: kinetics of anaerobic metabolism in resting muscle by 31P- and 1H-NMR spectroscopy.

Environmental stress, such as low temperature, extracellular acidosis and anoxia, is known to play a key role in metabolic regulation. The aim of the present study was to gain insight into the combined temperature-pH regulation of metabolic rate in frog muscle, i.e.