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To study the effect of parecoxib sodium in alleviating inflammation in burned rats and restoring cognitive function in burned rats. 30 SPF grade SD rats were randomly divided into 6 groups: (1) Blank control group (Group C). (2) Sham surgery group (Group Sham). (3) Second-degree burn model (Group B). (4) Low-dose (1 mg/kg/d) parecoxib sodium (Group L+B). (5) Medium-dose (10 mg/kg/d) parecoxib sodium (Group M+B). (6) High-dose (20 mg/kg/d) parecoxib sodium (Group H+B). ELISA measures inflammatory factor IL-2, IL-6, TNF-α and IFN-γ, cognitive function factor NSE, cortisol and S-100ß. Combined with water maze and dark avoidance experiments to further verify the recovery of cognitive function in rats. The contents of IL-2, TNF-α and IL-6 in Group M+B were significantly lower than those in Group Sham (P<0.05), and the content of IFN-γ was significantly lower than that in Group Sham (P<0.05). The cognitive markers NSE, S-100ß and cortisol levels in Group M+B were significantly higher than those in Group Sham at 2h, 1d, 5d and 10d after operation (P<0.05). In the Group M+B dark-avoidance experiment, the number of probes and errors were not significantly different than those in Group Sham and Group C (P>0.05), and the number of times Group M+B found a platform in the water maze experiment and crossed the platform was second only to Group B and Group C. Parecoxib sodium can effectively reduce inflammation in burn rats and promote cognitive recovery in burn rats, and the optimal dose of parecoxib sodium for burn rats is 10 mg/kg.
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As a new means of rehabilitation, blood flow restriction training (BFRT) is widely used in the field of musculoskeletal rehabilitation. To observe whether BFRT can improve the efficacy of routine rehabilitation intervention in patients with chronic ankle instability (CAI). Twenty-three patients with CAI were randomly divided into a routine rehabilitation group (RR Group) and a routine rehabilitation â+ âblood flow restriction training group (RR â+ âBFRT Group) according to the Cumberland Ankle Instability Tool (CAIT) score. The RR Group was treated with routine rehabilitation means for intervention, and the RR â+ âBFRT Group was treated with a tourniquet to restrict lower limb blood flow for rehabilitation training based on routine training. Before and after the intervention, the CAIT score on the affected side, standing time on one leg with eyes closed, comprehensive scores of the Y-balance test, and surface electromyography data of tibialis anterior (TA) and peroneus longus (PL) were collected to evaluate the recovery of the subjects. Patients were followed up 1 year after the intervention. After 4 weeks of intervention, the RR â+ âBFRT Group CAIT score was significantly higher than the RR Group (19.33 VS 16.73, p â< â0.05), the time of standing on one leg with eyes closed and the comprehensive score of Y-balance were improved, but there was no statistical difference between groups (p â> â0.05). RR â+ âBFRT Group increased the muscle activation of the TA with maximum exertion of the ankle dorsal extensor (p â< â0.05) and had no significant change in the muscle activation of the PL with maximum exertion of the ankle valgus (p â> â0.05). There was no significant difference in the incidence of resprains within 1 year between the groups (36.36% VS 16.67%, p â> â0.05). The incidence of ankle pain in the RR â+ âBFRT Group was lower than that in the RR Group (63.64% VS 9.09%, p â< â0.01). Therefore, four-weeks BFRT improves the effect of the routine intervention, and BFRT-related interventions are recommended for CAI patients with severe ankle muscle mass impairment or severe pain.
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Polyureas have been widely applied in many fields, such as coatings, fibers, foams and dielectric materials. Traditionally, polyureas are prepared from isocyanates, which are highly toxic and harmful to humans and the environment. Synthesis of polyureas via non-isocyanate routes is green, environmentally friendly and sustainable. However, the application of non-isocyanate polyureas is quite restrained due to their brittleness as the result of the lack of a soft segment in their molecular blocks. To address this issue, we have prepared polyester polyureas via an isocyanate-free route and introduced polyester-based soft segments to improve their toughness and endow high impact resistance to the polyureas. In this paper, the soft segments of polyureas were synthesized by the esterification and polycondensation of dodecanedioic acid and 1,4-butanediol. Hard segments of polyureas were synthesized by melt polycondensation of urea and 1,10-diaminodecane without a catalyst or high pressure. A series of polyester polyureas were synthesized by the polycondensation of the soft and hard segments. These synthesized polyester-type polyureas exhibit excellent mechanical and thermal properties. Therefore, they have high potential to substitute traditional polyureas.
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Alzheimer's disease (AD) is a progressively debilitating neurodegenerative condition primarily affecting the elderly. Emerging research suggests that microRNAs (miRNAs) play a role in the development of AD. This study investigates the impact of miR-107-5p on neurological damage, oxidative stress, and immune responses in AD. We utilized APP/PS1 mice as AD mouse models and C57BL/6 J mice as controls. AD mice received treatment with agomir miR-107-5p (to overexpress miR-107-5p) or BAY11-7082 (an NF-κB pathway inhibitor). We evaluated learning and memory abilities through the Morris water maze test. Histopathological changes, hippocampal neuron distribution, and apoptosis were assessed using hematoxylin-eosin, Nissl, and TUNEL staining. Reactive oxygen species (ROS) levels, amyloid-Aß (Aß1-40/42) contents, and inflammatory factors (TNF-α, IL-6, IL-1ß) in hippocampal tissues were measured using ROS kits and enzyme-linked immunosorbent assay (ELISA). Microglial activation in hippocampal tissues was observed under a fluorescence microscope. miR-107-5p's binding to TLR4 was predicted via the TargetScan database and confirmed through a dual-luciferase assay. miR-107-5p expression, along with TLR4, APOE, and TREM2 in hippocampal tissue homogenate, and NF-κB p65 protein expression in the nucleus and cytoplasm were assessed via RT-qPCR and Western blot. Overexpression of miR-107-5p ameliorated hippocampal neurological damage, oxidative stress, and immune responses. This was evidenced by improved enhanced learning/memory abilities, reduced Aß1-40 and Aß1-42 levels, diminished neuronal injuries, decreased ROS and TNF-α, IL-6, and IL-1ß levels, increased APOE and TREM2 levels, and suppressed microglial activation. miR-107-5p directly targeted and inhibited TLR4 expression, leading to reduced nuclear translocation of NF-κB p65 in the NF-κB pathway. Inhibition of the NF-κB pathway similarly improved neurological damage, oxidative stress, and immune response in AD mice. miR-107-5p exerts its beneficial effects by suppressing the TLR4/NF-κB pathway, ultimately ameliorating neurological damage, oxidative stress, and immune responses in AD mice.
Assuntos
Doença de Alzheimer , MicroRNAs , Animais , Humanos , Camundongos , Doença de Alzheimer/genética , Apolipoproteínas E/metabolismo , Imunidade , Interleucina-6/metabolismo , Camundongos Endogâmicos C57BL , MicroRNAs/genética , MicroRNAs/metabolismo , NF-kappa B/genética , NF-kappa B/metabolismo , Estresse Oxidativo/genética , Espécies Reativas de Oxigênio , Transdução de Sinais/genética , Receptor 4 Toll-Like/genética , Receptor 4 Toll-Like/metabolismo , Fator de Necrose Tumoral alfa/genética , Fator de Necrose Tumoral alfa/metabolismoRESUMO
BACKGROUND: Whether neuromuscular block (NMB) affects Intra-abdominal pressure (IAP) and cognition in Prostate cancer (PC) patients with Robotic-assisted laparoscopic radical prostatectomy (RALRP) remains unclear. Here we aimed to compare the effects of deep and moderate NMB on the IAP, inflammation, and cognition. METHODS: The Moderate neuromuscular block (MNMB) group (N = 44) and Deep neuromuscular block (DNMB) group (N = 47) were recruited. Intra-abdominal pressure was adjusted to meet RALRP requirements. The expression of pro-inflammatory factors was measured by ELISA. MMSE scores were recorded before the operation, 1 day and 1 week after the operation. RESULTS: Significant decreases in IAP (p < 0.001) and IL-1ß, IL-6, TNF-a, and S-100ß (p ≤ 0.01) expressions were found in the DNMB group. The MMSE score in the DNMB group was higher than that in the MNMB group on day one (p = 0.046). The incidence of nausea and vomiting was lower in the DNMB group than that in the MNMB group (p = 0.013). CONCLUSIONS: DNMB reduces IAP and inflammation and improves post-operative cognitive functions in PC patients with RALRP.
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OBJECTIVE: Alzheimer's disease (AD) is a neurological disease. Dexmedetomidine (Dex) has been evidenced to exert neuroprotective effects on multiple neurological diseases, while the function of microRNA(miR)- 214-5p on Dex-mediated AD progression via targeting the suppressor of zest 12 (SUZ12) remains unclear. This study obligates to investigate the regulatory functions of Dex, miR-214-5p and SUZ12 on AD. METHODS: The expression of miR-214-5p and SUZ12 in APPswe/PS1dE9 mice (hereinafter referred to as AD mice) was examined. Thereafter, the AD mice were treated with Dex or increased miR-214-5p or reduced SUZ12 to determine the spatial memory ability, apoptosis of hippocampal neurons and the contents of serum inflammatory and oxidative stress factors of AD mice. Finally, the target relationship between miR-214-5p and SUZ12 was detected. RESULTS: MiR-214-5p was reduced and SUZ12 was elevated in AD mice. Dex administration reduced the apoptosis of hippocampal neurons, the contents of serum inflammatory factor and oxidative stress, and attenuated the cognitive impairment of AD mice accompanied by up-regulated miR-214-5p and down-regulated SUZ12, and the overexpression of miR-214-5p or reduction of SUZ12 could effectively enhance the Dex-treated effects on AD mice. MiR-214-5p targeted SUZ12. CONCLUSION: Dex may have a potential neuroprotective effect on AD via the miR-214-5p/SUZ12 axis. This study provides novel therapeutic targets for AD treatment.
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Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/metabolismo , Dexmedetomidina/farmacologia , Hipocampo/efeitos dos fármacos , MicroRNAs/metabolismo , Fármacos Neuroprotetores/farmacologia , Complexo Repressor Polycomb 2/metabolismo , Animais , Dexmedetomidina/administração & dosagem , Modelos Animais de Doenças , Camundongos , MicroRNAs/efeitos dos fármacos , Fármacos Neuroprotetores/administração & dosagem , Complexo Repressor Polycomb 2/efeitos dos fármacosRESUMO
OBJECTIVE: The objective is to compare the effect of general anesthesia (GA) and monitored anesthesia care (MAC) on clinical outcomes in patients with endovascular therapy for vertebrobasilar occlusion stroke. METHODS: 139 patients undergoing endovascular therapy for vertebrobasilar stroke, were recruited. The patients were randomized into GA group and MAC group (about 1:1 ratio). GA group received general anesthesia and MAC group received monitored anesthesia care during endovascular therapy. The primary outcome measure was the shift in the degree of disability among the 2 groups as measured by the modified Rankin scale score (mRS) at 90 days (80-100 days). Secondary end points included infarct volume and related complications. RESULTS: The patients were assigned randomly (about 1:1 allocation) to GA group (n=72) and MAC group (n=67). The primary outcome of functional independence measured by 90-day mRS score was not significantly different between the 2 groups (median (IQR), 2 (1-3) vs. 3 (1-4); P=0.316). Final infarct volume was smaller in the GA group than in the MAC group (median (IQR), 27.60 (13.75-83.52) vs. 33.60 (26.85-92.95); P=0.045). There were no differences with statistical significance in rates of successful reperfusion (modified Thrombolysis in Cerebral Ischemia (mTICI) 2b-3) between 2 groups (73.61% vs. 76.12%; P=0.734). Early neurological outcomes measured by the 24-hour National Institutes of Health Stroke Scale scores (NIHSS) showed that 11 (interquartile range (IQR), 3-22) in GA group and 11 (interquartile range (IQR), 7-25) in MAC group, but were not statistically significant. There was no statistical difference in postoperative complications between the two groups. CONCLUSION: For patients who underwent endovascular therapy for vertebrobasilar occlusion strok caused by occlusions in the posterior circulation, MAC appears to be as effective as GA. However, MAC is associated with bigger final infarct volume. Future studies are warranted to confirm our findings.