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001-es BibID:BIBFORM089749
035-os BibID:(cikkazonosító)8172 (scopus)85094855183 (wos)000588924400001
Első szerző:Alvarado, Gerardo
Cím:Heme-Induced Oxidation of Cysteine Groups of Myofilament Proteins Leads to Contractile Dysfunction of Permeabilized Human Skeletal Muscle Fibres / Alvarado Gerardo, Tóth Attila, Csősz Éva, Kalló Gergő, Dankó Katalin, Csernátony Zoltán, Smith Ann, Gram Magnus, Akerström Bo, Édes István, Balla György, Papp Zoltán, Balla József
Dátum:2020
ISSN:1661-6596 1422-0067
Megjegyzések:Heme released from red blood cells targets a number of cell components including the cytoskeleton. The purpose of the present study was to determine the impact of free heme (20?300 ?M) on human skeletal muscle fibres made available during orthopedic surgery. Isometric force production and oxidative protein modifications were monitored in permeabilized skeletal muscle fibre segments. A single heme exposure (20 ?M) to muscle fibres decreased Ca2+-activated maximal (active) force (Fo) by about 50% and evoked an approximately 3-fold increase in Ca2+-independent (passive) force (Fpassive). Oxidation of sulfhydryl (SH) groups was detected in structural proteins (e.g., nebulin, ?-actinin, meromyosin 2) and in contractile proteins (e.g., myosin heavy chain and myosin-binding protein C) as well as in titin in the presence of 300 ?M heme. This SH oxidation was not reversed by dithiothreitol (50 mM). Sulfenic acid (SOH) formation was also detected in the structural proteins (nebulin, ?-actinin, meromyosin). Heme effects on SH oxidation and SOH formation were prevented by hemopexin (Hpx) and ?1-microglobulin (A1M). These data suggest that free heme has a significant impact on human skeletal muscle fibres, whereby oxidative alterations in structural and contractile proteins limit contractile function. This may explain and or contribute to the weakness and increase of skeletal muscle stiffness in chronic heart failure, rhabdomyolysis, and other hemolytic diseases. Therefore, therapeutic use of Hpx and A1M supplementation might be effective in preventing heme-induced skeletal muscle alterations.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
skeletal muscle fibre
contractile dysfunction
heme
sulfhydryl groups
sulfenic acid formation
chronic heart failure
oxidation; hemopexin
[alfa]1-microglobulin
skeletal muscle myopathy
Megjelenés:International Journal Of Molecular Sciences. - 21 : 21 (2020), p. 1-17. -
További szerzők:Tóth Attila (1971-) (biológus) Csősz Éva (1977-) (biokémikus, molekuláris biológus) Kalló Gergő (1989-) (molekuláris biológus) Dankó Katalin (1952-2021) (belgyógyász, allergológus és klinikai immunológus) Csernátony Zoltán (1959-2023) (ortopéd sebész, traumatológus) Smith, Ann Gram, Magnus Akerström, Bo Édes István (1952-) (kardiológus) Balla György (1953-) (csecsemő és gyermekgyógyász, neonatológus) Papp Zoltán (1965-) (kardiológus, élettanász) Balla József (1959-) (belgyógyász, nephrológus)
Pályázati támogatás:EFOP-3.6.2-16-2017-00006
EFOP
OTKA-K-132828
OTKA
K-84300
OTKA
K-109083
OTKA
GINOP-2.3.2-15-2016-00043
GINOP
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001-es BibID:BIBFORM062133
Első szerző:Péter Andrea (kardiológus)
Cím:Echocardiographic abnormalities in new-onset polymyositis/dermatomyositis / Andrea Péter, Ágnes Balogh, Szabolcs Szilágyi, Réka Faludi, Melinda Nagy-Vincze, István Édes, Katalin Dankó
Dátum:2015
Megjegyzések:OBJECTIVE:To identify early echocardiographic abnormalities at the time of diagnosis of polymyositis (PM) and dermatomyositis (DM) and follow the echocardiographic findings during the first 3 months of therapy.METHODS:We included 30 PM/DM patients (23/7) with a mean age of 42.3 ? 1.6 years and without cardiovascular symptoms. Age-matched healthy patients served as controls. Clinical characteristics were recorded. Traditional echocardiography and tissue Doppler imaging (TDI) were performed to measure systolic [ejection fraction, right ventricular fractional area change (RV FAC), lateral and tricuspid annulus s velocities] and diastolic echocardiographic variables (mitral inflow velocities: E, A; deceleration time: DT; lateral and tricuspid annulus e', a' velocities, lateral E/e').RESULTS:The left and right ventricular systolic dysfunction detected by TDI at the time of the PM/DM diagnosis improved, and characteristic values at the end of the followup period were comparable to those of the controls (lateral s: 10.6 ? 0.2, 8.7 ? 0.4, 9.6 ? 0.3, 11.3 ? 0.2 cm/s; RV FAC: 45.2 ? 2.3, 36.9 ? 1.5, 42.2 ? 1.3, 46.9 ? 1.2%; tricuspid s: 13.3 ? 0.2, 9.5 ? 0.4, 10.3 ? 0.3, 11.6 ? 0.5 cm/s; control, 0, 1, and 3 mos, respectively). Measurements indicated the development of diastolic dysfunction at 3 mos (E/A: 1.4 ? 0.1, 1.29 ? 0.05, 1.03 ? 0.05, 0.92 ? 0.05; DT: 148.6 ? 3.6, 157.3 ? 5.7, 168.3 ? 6.0, 184.3 ? 6.2 ms; lateral e': 12.8 ? 0.3, 12.1 ? 0.5, 10.2 ? 0.6, 10.8 ? 0.8 cm/s; E/e': 5.6 ? 0.1, 5.0 ? 0.22, 6.92 ? 0.46, 7.64 ? 0.47; control, 0, 1, and 3 mos, respectively).CONCLUSION:TDI is a useful method to detect early cardiac abnormalities complementing the conventional echocardiographic measurements. LV and RV systolic dysfunction found in the acute phase significantly improved during the first 3 months of therapy; however, deterioration of diastolic dysfunction was also observed.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
DERMATOMYOSITIS
ECHOCARDIOGRAPHY
POLYMYOSITIS
SYSTOLIC AND DIASTOLIC DYSFUNCTION
TISSUE DOPPLER IMAGING
Megjelenés:The Journal of rheumatology. - 42 : 2 (2015), p. 272-281. -
További szerzők:Balogh Ágnes (1984-) (kardiológus) Szilágyi Szabolcs (1976-) (kardiológus) Faludi Réka Nagy-Vincze Melinda (1985-) (orvos) Édes István (1952-) (kardiológus) Dankó Katalin (1952-2021) (belgyógyász, allergológus és klinikai immunológus)
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