Healthy body

So, what is the Warburg effect good for? Otto Warburg and subsequent scientists until the late 1990s were unable to answer this question satisfactory. Research since then has shown that a key function of the metabolic reprogramming in cancer is to generate glycolytic intermediates and other energy metabolites as substrates for anabolism, which is the part of metabolism that synthesises “cellular components from precursors of low molecular weight” (International Union of Pure and Applied Chemistry definition 1997). More specifically, proliferating cells take up more glucose, glutamine [8] and other small molecules, and then channel these molecules into glycolysis or other energy metabolic reactions, which are “feeder pathways” for anabolic reactions. These anabolic reactions include the synthesis of nucleotides for DNA and RNA, the synthesis of non-essential amino acids for protein synthesis and the synthesis of other macromolecules. How energy metabolism is connected to anabolism is for example illustrated by the IUBMB-Nicholson Metabolic Pathways Chart

Most but not all healthy and cancerous proliferating cells take up more glucose as well as synthesise more lactate in the presence of oxygen than non-proliferating cells [4, 5]. Otto Warburg hypothesised that this was because of a mitochondrial defect causing cancer cells to rely on glycolysis for ATP resynthesis [6]. However, many cancers have functioning mitochondria [7] and thus a defective oxidative phosphorylation does not generally explain increased glycolytic flux in cancer.

We conducted a systematic review with meta-analysis, systematically searching PubMed, Web of Science, Scopus, and SPORTDiscus (since inception to 14 May 2021) for studies comparing the risk of death from neurodegenerative disease in athletes participating in contact sports in which their heads recurrently receive blows from the bodies of other participants or from a ball versus a control group or dataset representing the general population.

Professional athletes seem to have a lower overall mortality risk than the general population, but controversy exists about whether athletes in sports associated with repetitive head impacts have a higher risk of mortality from neurodegenerative diseases.

Aging is a complex process, involving changes of all organ systems. Although FEV1 constitutes a “pulmonary function parameter”, various aging-related changes contribute to the FEV1 decline. For example, the prevalence of hyperkyphosis in older adults varies between 20 and 40% among both sexes and is closely associated with the FEV1 decline . In addition to the well-known age-related structural changes concerning the spine, muscles, and ribs, specific functional impairments compromise pulmonary function at an advanced age. These include decreased respiratory muscle performance, reduced cough strength, and increasing mucociliary dysfunction due to poor airway clearance associated with ventilatory restriction. Aging-related changes in the alveolar-capillary membrane and in lung mechanical properties contribute to impaired lung diffusion capacity and an increased ventilation-perfusion mismatch, especially during exercise.

Президент України підписав указ про санкції проти Анатолія Тимощука Анатолій Тимощук: проти ексфутболіста збірної України запровадили персональні санкції президента України, у чому полягає зміст обмежувальних заходів відносно ек...

"Реал Мадрид" встановив унікальне досягнення у 121-річній історії клубу "Реал Мадрид": у матчі 16-го туру Прімери проти "Вільярреала" команда вийшла з перших хвилин без іспанських футболістів та установила унікальне досягнення у своїй 121-....