| 1. |
- Alvarado, Gerardo, et al.
(författare)
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Heme-induced oxidation of cysteine groups of myofilament proteins leads to contractile dysfunction of permeabilized human skeletal muscle fibres
- 2020
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Ingår i: International Journal of Molecular Sciences. - : MDPI AG. - 1661-6596 .- 1422-0067. ; 21:21
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Tidskriftsartikel (refereegranskat)abstract
- Background: 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 µM) on human skeletal muscle fibres made available during orthopedic surgery. Methods: Isometric force production and oxidative protein modifications were monitored in permeabilized skeletal muscle fibre segments. Results: A single heme exposure (20 µM) 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, α-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 µM heme. This SH oxidation was not reversed by dithiothreitol (50 mM). Sulfenic acid (SOH) formation was also detected in the structural proteins (nebulin, α-actinin, meromyosin). Heme effects on SH oxidation and SOH formation were prevented by hemopexin (Hpx) and α1-microglobulin (A1M). Conclusions: 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.
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| 2. |
- Csenge, Szeverenyi, et al.
(författare)
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Az ortopédiai nagymǔtétek során alkalmazott terápiás szuggesztiók hatása a beteg gyógyulására
- 2018
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Ingår i: Orvosi Hetilap. - : Akademiai Kiado Zrt.. - 0030-6002 .- 1788-6120. ; 159:48, s. 2011-2020
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Tidskriftsartikel (refereegranskat)abstract
- Introduction and aim: Hip and knee replacement surgery is very demanding for patients. Medication consumption is further increased by perioperative anxiety. Besides pain killer and anxiolytic medications, patients' recovery can be enhanced by applying therapeutic suggestions, which are easily applicable during the patient-physician communication. Method: In our prospective, randomized, controlled study we examined the effects of positive suggestions on patients undergoing hip or knee arthroplasty in spinal anaesthesia. Members of the suggestion group received the therapeutic suggestions during a pre-surgery physician visit, and by listening to an audio recording during surgery. Results: Compared to the control group (n = 50), in the suggestion group (n = 45) the need of medication (pain killer and adjuvant pain medication) during the surgery was lower (p = 0.037), the mean change from baseline in the well-being of the patients was better on the 2nd [1.31 (0.57; 2.04); p<0.001] and 4th [0.97 (0.23; 1.7); p = 0.011] postoperative day and less transfusion had to be administered (OR: 2.37; p = 0.004). However, there was no difference between the two groups in the postoperative need of medications, in the length of hospitalisation and in the frequency of complications. Conslusion: Our results indicate that the administration of therapeutic suggestions in the perioperative period may be beneficial for orthopaedic surgery patients.
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| 3. |
- Szeverenyi, Csenge, et al.
(författare)
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The use of adjunct psychosocial interventions can decrease postoperative pain and improve the quality of clinical care in orthopedic surgery. A systematic review and meta-analysis of randomized controlled trials
- 2018
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Ingår i: Journal of Pain. - : Elsevier BV. - 1526-5900. ; 19:11, s. 1231-1252
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Tidskriftsartikel (refereegranskat)abstract
- This study aims to assess the effectiveness of psychosocial techniques to decrease postoperative pain and improve perioperative clinical care in orthopedic surgery. A systematic review and meta-analysis was performed to evaluate the effects of psychosocial methods among adults undergoing orthopedic surgeries. The systematic review included both randomized and nonrandomized trials, but only randomized controlled clinical trials (RCTs) were included in the meta-analysis. Key outcomes were postoperative pain, analgesic requirement, perioperative anxiety, quality of life, and recovery. After searching the databases from January 1980 to September 2016, a total of 62 RCTs were included with a pooled sample size of 4,908. Psychosocial interventions significantly reduced postoperative pain (Hedges’ g = 0.31 [95% confidence interval = 0.14, 0.48]), and preoperative and postoperative anxiety (g = 0.26 [0.11, 0.42] and g = 0.4 [0.21, 0.59], respectively). Furthermore, psychosocial interventions improved recovery (g = 0.38 [0.22, 0.54]). However, no significant effects were found for postoperative analgesic use (g = 0.16 [−0.01, 0.32]) and quality of life (g = 0.14 [−0.05, 0.33]). Patient education and relaxation techniques produced the most consistent positive effects, showing benefits on pain, anxiety, and recovery. Cognitive or behavioral techniques improved recovery. Furthermore, larger effects were found for studies that included acute surgeries compared to elective surgeries. The results indicate that psychosocial interventions, especially patient education and relaxation training, may reduce perioperative side effects and improve recovery in patients undergoing orthopedic procedures, but the quality of evidence is generally low. More well-powered, high-quality studies are needed to increase confidence.
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| 4. |
- Kenanidis, Eustathios, et al.
(författare)
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Acetabular dysplasia
- 2018
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Ingår i: The adult hip - master case series and techniques. - Cham : Springer. - 9783319641775 - 9783319641751 ; , s. 107-213
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Bokkapitel (refereegranskat)
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