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Acides aminés, peptides et protéines
Protéines
Métalloprotéines
Protéines de liaison au fer
Protéines à fer non hème
Ferrosulfoprotéines
Complexe II de la chaîne respiratoire
Complexe II de la chaîne respiratoire : Questions médicales fréquentes
Termes MeSH sélectionnés :
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"description": "Comment diagnostiquer une dysfonction du complexe II ?\nQuels examens sont utilisés pour évaluer le complexe II ?\nQuels marqueurs biochimiques indiquent une anomalie du complexe II ?\nLe diagnostic nécessite-t-il une imagerie ?\nLes tests de fonction respiratoire sont-ils utiles ?",
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"@type": "Question",
"name": "Comment diagnostiquer une dysfonction du complexe II ?",
"position": 1,
"acceptedAnswer": {
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"text": "Des tests génétiques et des analyses biochimiques peuvent identifier des anomalies."
}
},
{
"@type": "Question",
"name": "Quels examens sont utilisés pour évaluer le complexe II ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les biopsies musculaires et les tests d'activité enzymatique sont courants."
}
},
{
"@type": "Question",
"name": "Quels marqueurs biochimiques indiquent une anomalie du complexe II ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des niveaux élevés de succinate et des déficits en ATP peuvent être observés."
}
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{
"@type": "Question",
"name": "Le diagnostic nécessite-t-il une imagerie ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "L'imagerie n'est pas spécifique, mais peut aider à évaluer des dommages tissulaires."
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{
"@type": "Question",
"name": "Les tests de fonction respiratoire sont-ils utiles ?",
"position": 5,
"acceptedAnswer": {
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"text": "Ils peuvent aider à évaluer l'impact sur la respiration cellulaire."
}
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{
"@type": "Question",
"name": "Quels sont les symptômes d'une déficience du complexe II ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Fatigue, faiblesse musculaire, et troubles neurologiques peuvent survenir."
}
},
{
"@type": "Question",
"name": "Les troubles cognitifs sont-ils liés au complexe II ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des déficiences peuvent entraîner des troubles cognitifs et neurologiques."
}
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{
"@type": "Question",
"name": "Y a-t-il des symptômes cardiaques associés ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des arythmies et des cardiomyopathies peuvent être observées dans certains cas."
}
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{
"@type": "Question",
"name": "Les symptômes varient-ils selon l'âge ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les symptômes peuvent se manifester différemment selon l'âge du patient."
}
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{
"@type": "Question",
"name": "Des douleurs musculaires sont-elles fréquentes ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des douleurs musculaires peuvent être un symptôme courant de la déficience."
}
},
{
"@type": "Question",
"name": "Peut-on prévenir les déficiences du complexe II ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "La prévention est difficile, mais un mode de vie sain peut réduire les risques."
}
},
{
"@type": "Question",
"name": "Les tests génétiques peuvent-ils aider à la prévention ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils peuvent identifier les individus à risque de déficiences héréditaires."
}
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{
"@type": "Question",
"name": "L'exercice régulier est-il recommandé ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'exercice peut améliorer la santé mitochondriale et la fonction énergétique."
}
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{
"@type": "Question",
"name": "Les antioxydants sont-ils bénéfiques ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les antioxydants peuvent aider à protéger les cellules des dommages oxydatifs."
}
},
{
"@type": "Question",
"name": "Une surveillance médicale régulière est-elle nécessaire ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, un suivi régulier peut aider à détecter précocement des anomalies."
}
},
{
"@type": "Question",
"name": "Quels traitements sont disponibles pour les déficiences du complexe II ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les traitements incluent des suppléments énergétiques et des thérapies ciblées."
}
},
{
"@type": "Question",
"name": "La thérapie génique est-elle une option ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "La thérapie génique est en recherche, mais pas encore largement disponible."
}
},
{
"@type": "Question",
"name": "Les changements alimentaires peuvent-ils aider ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une alimentation riche en nutriments peut soutenir la fonction mitochondriale."
}
},
{
"@type": "Question",
"name": "Des médicaments spécifiques existent-ils ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certains médicaments peuvent améliorer la fonction énergétique, mais sont limités."
}
},
{
"@type": "Question",
"name": "La physiothérapie est-elle bénéfique ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la physiothérapie peut aider à améliorer la force musculaire et la fonction."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir avec une déficience du complexe II ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications incluent des troubles cardiaques, neurologiques et métaboliques."
}
},
{
"@type": "Question",
"name": "Les complications sont-elles réversibles ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines complications peuvent être gérées, mais d'autres peuvent être permanentes."
}
},
{
"@type": "Question",
"name": "Y a-t-il un risque accru de maladies métaboliques ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les déficiences peuvent augmenter le risque de maladies métaboliques."
}
},
{
"@type": "Question",
"name": "Les complications affectent-elles la qualité de vie ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles peuvent significativement réduire la qualité de vie des patients."
}
},
{
"@type": "Question",
"name": "Des complications neurologiques sont-elles fréquentes ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des complications neurologiques comme l'épilepsie peuvent survenir."
}
},
{
"@type": "Question",
"name": "Quels sont les facteurs de risque pour les déficiences du complexe II ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les facteurs incluent des antécédents familiaux, des mutations génétiques et l'âge."
}
},
{
"@type": "Question",
"name": "Les maladies métaboliques augmentent-elles le risque ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines maladies métaboliques peuvent prédisposer à des déficiences."
}
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{
"@type": "Question",
"name": "Le mode de vie influence-t-il le risque ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Un mode de vie sédentaire et une mauvaise alimentation peuvent augmenter le risque."
}
},
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"@type": "Question",
"name": "Les infections peuvent-elles être un facteur de risque ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines infections virales peuvent exacerber les symptômes chez les patients à risque."
}
},
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"@type": "Question",
"name": "L'exposition à des toxines est-elle un facteur de risque ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'exposition à certaines toxines environnementales peut affecter la fonction mitochondriale."
}
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Biological motors function at the interface of biology, physics, and chemistry, and it remains unsettled what rules from which disciplines account for how these motors work. Myosin motors are enzymes ...
Active learning and practices are strongly encouraged or made mandatory by local, national, and European organizations. Therefore, we set up an interactive practical classroom, engaging all of the att...
Neuromuscular electrical stimulation (NMES) is effective in muscle strengthening after orthopedic injury particularly when muscle activation failure is present, but the associated pain can be a barrie...
Healthy participants, 18-30 years of age experienced 3 conditions: 10 NMES contractions, 10 bursts of NxES on the patella, and 10 volitional contractions on the right knee. Pressure pain thresholds (P...
Pain ratings were higher in the NxES condition compared to NMES (p = .000). No differences in PPTs prior to each condition were observed but PPTs were significantly higher in the right and left knees ...
NxES and NMES produced higher PPTs in both knees but not in the finger, suggesting that the mechanisms responsible for the reduction in pain are located in the spinal cord and local tissues. Pain redu...
Hundred years ago, Fenn demonstrated that when a muscle shortens faster, its energy liberation increases. Fenn's results were the first of many that led to the general understanding that isometric mus...
Changes in elbow flexion torque and biceps brachii electromyogram (EMG) activity over 30 repetitive maximal voluntary concentric-only (CON-only), eccentric-only (ECC-only), and alternative concentric ...
Fifteen healthy young men performed CON-only, ECC-only and CON-ECC in their maximal effort between 10° and 100° elbow flexion on an isokinetic dynamometer at an angular velocity of 30°/s with a 3-s re...
The torque decreased (p < 0.01) from the first to 30th contraction in CON-only (- 49.5 ± 11.0%), ECC-only (- 32.2 ± 7.4%), and concentric (- 62.3 ± 8.7%) as well as eccentric phase (- 58.9 ± 9.3%) in ...
These results suggest greater fatigue resistance in repetitive maximal eccentric than concentric contractions, but the fatigue assessed by MVC-ISO does not show it....
Eccentric contraction (ECC) often results in large and long-lasting force deficits accompanied by muscle soreness, primarily due to muscle damage. In this sense, exercises that involve ECC are less de...
This paper aimed to compare the involuntary stimulated neuromuscular response of thigh muscles in top-level karate athletes and recreational groups....
The study included 13 male karate athletes (KAs) and 14 non-athlete male individuals (NAs). Tensiomyographic (TMG) measurements were obtained from the rectus femoris (RF), vastus medialis (VM), vastus...
Statistically significant differences were observed between KAs and NAs in knee extensor/flexor delay time (Td), contraction time (Tc), total contraction time (Tct), maximal radial displacement of the...
The lower Tct values indicate an improved ability of top-level karateka to make fast contractions of the agonist muscles. KAs' higher RMTD values suggest on strength characteristics needed in breaking...
To minimize neuromuscular electrical stimulation during electroporation-based treatments, the replacement of long monophasic pulses with bursts of biphasic high-frequency pulses in the range of micros...
During muscle contraction, not only are the fascicles shortening but also the pennation angle changes, which leads to a faster contraction of the muscle than of its fascicles. This phenomenon is calle...
The aim of the present study was to investigate whether exercise-induced muscle damage (EIMD) influences cardiovascular responses to isometric exercise and post-exercise circulatory occlusion (PECO). ...
Eleven male and nine female participants performed unilateral isometric knee extension at 30% of maximal voluntary contraction (MVC) for 3-min. A thigh cuff was rapidly inflated to 250 mmHg for two mi...
EIMD caused 21% decrease in MVC (baseline: 634.6 ± 229.3 N, 48 h: 504.0 ± 160 N), and a 17-fold increase in perceived soreness using a visual-analogue scale (0-100 mm; VAS...
The MAP correlations with muscle soreness, RPE and Pain during contractions of damaged muscles suggests that higher afferent activity was associated with higher MAP responses to exercise....