20/01/2023
Muscle fibres are, in contrast to proliferating cells, non-proliferating syncytia (i.e. multi-nuclear cells) with thousands of nuclei and muscle fibres can reach a length of up to ≈ 20 cm in humans [15]. However, given that proliferating cells reprogramme their metabolism to channel more energy metabolites into anabolism, and given that muscle hypertrophy relies on anabolism, an intriguing question is: Do hypertrophying, post-mitotic muscle fibres reprogramme their metabolism similar to proliferating cells?
20/01/2023
In summary, a key function of the metabolic reprogramming of proliferating cells is to provide substrates for anabolic pathways that generate the biomass necessary for cell proliferation. Otto Warburg already in 1924 stated that such reprogramming was not unique to cancer but also occurred for example in the growing chick embryo [13]. Several reviews discuss specific aspects of metabolic reprogramming in cancer such as the regulation of the metabolic reprogramming, the metabolic pathways involved (Fig. 1), the function of metabolic reprogramming beyond energy metabolism and anabolism, research methods to analyse metabolic reprogramming as well as unanswered questions
20/01/2023
Ювентус вийшов у чвертьфінал Кубка Італії, не без проблем впоравшись з Монцою
В 1/8 Кубка Італії Ювентус з мінімальною перевагою обіграв Монцу.
20/01/2023
У боях з росіянами на фронті загинули четверо фанатів Кривбаса
Українці продовжують неймовірно високою ціною протистояти вторгненню російських окупантів.
20/01/2023
"Рости він уже точно не буде": Леоненко розкритикував Циганкова за трансфер у Жирону
Екс-форвард збірної України Віктор Леоненко прокоментував перехід Віктора Циганкова в Жирону.
18/01/2023
Longitudinal bending stiffness is a key consideration for both marathon shoes and track spikes. Although sprint spikes have been stiffened with carbon fiber plates for more than 20 years, the exact effect of increased longitudinal bending stiffness on sprinting performance is still not well understood.
One benefit of increased bending stiffness is decreasing the amount of energy lost at the metatarsal-phalangeal (MTP) joint. While running and sprinting, the MTP joint dorsiflexes during stance phase, absorbing mechanical energy, and remains dorsiflexed throughout the majority of the push-off, returning little of that energy. On average, energy loss at the MTP joint has been reported to be ~ 48 J during sprinting at 7.1–8.4 m/s and 13–21 J during running at 4.0–4.4 m/s [31, 32]. Stiffening the sole will limit MTP dorsiflexion, and, in turn, limit the amount of energy lost. Along with altering MTP mechanics, increasing longitudinal bending stiffness shifts the point of force application more anteriorly, creating a larger moment arm at the ankle. Moreover, the change in moment arm might offer the potential to improve the effectiveness of horizontal force application, thereby improving sprint performance, as suggested by Willwacher et al. [14]. However, increasing the bending stiffness will increase force demands from the plantar flexor muscles, which can be detrimental for performance
18/01/2023
Стартлист жіночого спринту на етапі Кубка світу з біатлону в Антгольці
Шостий етап Кубка світу з біатлону 2022/23 у італійському Антгольці: визначився стартлист на першу гонку року – спринт серед жінок: коли бігтимуть українки та лідерки...
18/01/2023
"Прометей" здобув сьому перемогу в баскетбольному Єврокубку: турнірна таблиця
"Прометей" – "Брешія": результат матчу 11-го туру Єврокубка 2022/23, турнірна таблиця – як зіграли українці, що означає цей результат та хто наступний суперник