Free amino acid composition in blood and muscle of the gobi Precottus glehni at the period of preparation and completion of hibernation

Phosphoethanolamine in brain of the euritherm lake fish Perccottus glehni (Eleotridae, Perciformes, Dyb. 1877) as a phenomenon depending on temperature factor

“…As shown earlier, in blood and different organs of ectothermic teleosts (in muscles, liver, lungs, kidneys, etc. ), taurine is intensively accumulated during the process of the seasonal temperature decrease or acclimation [18][19][20][21]. However, in brain, according to results of the present work, the behavior of taurine under similar conditions is opposite to its response in the above-listed organs ( Table 1, 2, Fig.…”

“…Like PEA, taurine in the process of phylogenesis is revealed in not all species of ectothermic animals. Its content is low in the body of different invertebrate species including freshwater molluscs, insects, and crustacean [12][13][14][15][16], a quantitative rise of its content occurring only in vertebrates [17][18][19]. The littoral molluscs and mussels, in which the taurine content reaches 55-77% of the total pool of free amino acids [20], are an exception among invertebrates and possibly represent an example of biochemical convergence.…”

Taurine Promotes Neurite Outgrowth and Synapse Development of Both Vertebrate and Invertebrate Central Neurons

“…Specifically, in marine invertebrates, taurine's robust role in osmoregulation is well characterized (Lange, 1963;Allen and Garrett, 1971;Gilles, 1972;Smith and Pierce, 1987;Miles et al, 2018). Other potential roles of taurine in invertebrates have been suggested such as an H 2 S scavenger in hydrothermal vent invertebrates (Koito et al, 2018), a source of energy for marine prokaryotes (Clifford et al, 2019), and a regulator of temperature tolerance in the fish Preccottus glehnii (Karanova, 2009). Similar to vertebrates, taurine has been found in high concentrations in some invertebrate larvae species during development and metamorphosis (Welborn and Manahan, 1995).…”

Influence of Low Temperature on the Evolution of Amino Acid Pools Adaptive Modifications inPoikilothermal Animals

“…The most impressive data are obtained for non-proteinogenic sulphoamino acidtaurine when studying the effect of low temperatures on the adaptation of fish and reptiles [26][27][28][29][30][31][32]. The phenomenon of аdaptive accumulation of taurine (2-amino-ethanesulfonic acid) is found first in our works in examining the impact of seasonal temperature drops or cold shock effect on the pattern of FAA in the eurythermal freshwater fish P. glehni [26][27].…”

“…In winter, before beginning hibernation, the contents of taurine in the muscles increases over the summer period to 4,3 times, making up 52,6% of the total FAA pool (table 3, Fig 2) [26]. The level of taurine in the blood rises in December to 7,7 times in comparison with July and is 45% of the total pool (table 4, Fig 2) [26].In contrast to the proteinogenic amino acid that alter their pools during the three-month hibernation of P. glehni in ice, level of taurine during this period virtually unchanged, but in the spring, after the release of the winter torpor, turns sharply, accounting for 11,9 % of the total FAA pool [26]. This fact indicates that metabolism is carried out even in a state of torpor at zero temperature and proteinogenic FAA are involved in it.…”