Összesen 2 találat.


001-es BibID:BIBFORM080103
035-os BibID:(cikkazonosító)3361 (scopus)85071306288 (wos)000477041100245
Első szerző:Pierantozzi, Enrico
Cím:Calcium Homeostasis Is Modified in Skeletal Muscle Fibers of Small Ankyrin1 Knockout Mice / Enrico Pierantozzi, Péter Szentesi, Dána Al-Gaadi, Tamás Oláh, Beatrix Dienes, Mónika Sztretye, Daniela Rossi, Vincenzo Sorrentino, László Csernoch
ISSN:1661-6596 1422-0067
Megjegyzések:Small Ankyrins (sAnk1) are muscle-specific isoforms generated by the Ank1 gene that participate in the organization of the sarcoplasmic reticulum (SR) of striated muscles. Accordingly, the volume of SR tubules localized around the myofibrils is strongly reduced in skeletal muscle fibers of 4- and 10-month-old sAnk1 knockout (KO) mice, while additional structural alterations only develop with aging. To verify whether the lack of sAnk1 also alters intracellular Ca2+ handling, cytosolic Ca2+ levels were analyzed in stimulated skeletal muscle fibers from 4- and 10-month-old sAnk1 KO mice. The SR Ca2+ content was reduced in sAnk1 KO mice regardless of age. The amplitude of the Ca2+ transients induced by depolarizing pulses was decreased in myofibers of sAnk1 KO with respect to wild type (WT) fibers, while their voltage dependence was not affected. Furthermore, analysis of spontaneous Ca2+ release events (sparks) on saponin-permeabilized muscle fibers indicated that the frequency of sparks was significantly lower in fibers from 4-month-old KO mice compared to WT. Furthermore, both the amplitude and spatial spread of sparks were significantly smaller in muscle fibers from both 4- and 10-month-old KO mice compared to WT. These data suggest that the absence of sAnk1 results in an impairment of SR Ca2+ release, likely as a consequence of a decreased Ca2+ store due to the reduction of the SR volume in sAnk1 KO muscle fibers.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
sarcoplasmic reticulum
calcium release
Megjelenés:International Journal of Molecular Sciences. - 20 : 13 (2019), p. 3361. -
További szerzők:Szentesi Péter (1967-) (élettanász) Al-Gaadi, Dana (1991-) Oláh Tamás (1983-) (élettanász) Dienes Beatrix (1972-) (élettanász, molekuláris biológus) Sztretye Mónika (1981-) (élettanász, elektrofiziológus) Rossi, Daniela Sorrentino, Vincenzo Csernoch László (1961-) (élettanász)
Pályázati támogatás:NKFIH K-115461
Internet cím:Szerző által megadott URL
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001-es BibID:BIBFORM110527
035-os BibID:(cikkazonosító)6933 (Scopus)85156172024 (WoS)000979332900001
Első szerző:Sztretye Mónika (élettanász, elektrofiziológus)
Cím:Unravelling the Effects of Syndecan-4 Knockdown on Skeletal Muscle Functions / Mónika Sztretye, Zoltán Singlár, Nyamkhuu Ganbat, Dána Al-Gaadi, Kitti Szabó, Zoltán Márton Köhler, László Dux, Anikó Keller-Pintér, László Csernoch, Péter Szentesi
Megjegyzések:The remodelling of the extracellular matrix plays an important role in skeletal muscle development and regeneration. Syndecan-4 is a cell surface proteoglycan crucial for muscle differentiation. Syndecan-4?/? mice have been reported to be unable to regenerate following muscle damage. To investigate the consequences of the decreased expression of Syndecan-4, we have studied the in vivo and in vitro muscle performance and the excitation?contraction coupling machinery in young and aged Syndecan-4+/? (SDC4) mice. In vivo grip force was decreased significantly as well as the average and maximal speed of voluntary running in SDC4 mice, regardless of their age. The maximal in vitro twitch force was reduced in both EDL and soleus muscles from young and aged SDC4 mice. Ca2+ release from the sarcoplasmic reticulum decreased significantly in the FDB fibres of young SDC4 mice, while its voltage dependence was unchanged regardless of age. These findings were present in muscles from young and aged mice as well. On C2C12 murine skeletal muscle cells, we have also found altered calcium homeostasis upon Syndecan-4 silencing. The decreased expression of Syndecan-4 leads to reduced skeletal muscle performance in mice and altered motility in C2C12 myoblasts via altered calcium homeostasis. The altered muscle force performance develops at an early age and is maintained throughout the life course of the animal until old age.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
skeletal muscle
calcium homeostasis
Megjelenés:International Journal Of Molecular Sciences. - 24 : 8 (2023), p. 6933. -
További szerzők:Singlár Zoltán (1994-) (biotechnológus) Ganbat, Nyamkhuu Al-Gaadi, Dana (1991-) Szabó Kitti Köhler Zoltán Márton Dux László Keller-Pintér Anikó Csernoch László (1961-) (élettanász) Szentesi Péter (1967-) (élettanász)
Pályázati támogatás:NKFIH K137600
NKFIH FK-142481
NKFIH FK134684
Internet cím:Szerző által megadott URL
Intézményi repozitóriumban (DEA) tárolt változat
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