Hepatic Upregulation of Tumor Necrosis Factor Alpha and Activation of Nuclear Factor Kappa B Following Methyl Methacrylate Administration in the Rat

The health and quality of life of dental workers in jordan during COVID-19: A cross-sectional study

BACKGROUND

Dental team members are susceptible to high mental and physical stress levels, which could have increased during the Coronavirus disease 2019 (COVID-19).

OBJECTIVE

This study aimed to evaluate Jordanian dental workers' health-related quality of life (HRQoL) and determine its predictors during the COVID-19 Pandemic.

METHODS

This was a cross-sectional survey study conducted on dental team members, namely; Dentists, dental Assistants, and Dental Technicians. The survey questionnaire was composed of questions related to stress during COVID-19, a short-form survey of 12 items (SF-12), a Depression, Anxiety, and Stress scale (DASS-21), and a Nordic musculoskeletal disorder questionnaire (NMQ). Descriptive analyses were used to describe the main outcome measures, and multiple variable regression analysis was conducted to identify the quality of life predictors.

RESULTS

Participants' HRQoL measured by SF-12 showed a mean±SD score of 67.1±17.19 for the physical component and 54.51±20.27 for the mental component. The Nordic scale showed symptoms of lower back pain as 63.9% over 12 months, 32% over 12 months' functional limitation symptoms, and 45% in 7 days The regression model was found strong for our study with 53.8% variations (r2 = 0.538, F = 43.739, P < 0.001) in health-related quality of life.

CONCLUSIONS

Our study concluded that the level of HRQoL among Jordanian dental specialists during COVID-19 was observed to impact levels of physical and mental well-being which negatively influence the quality of life. Predictive factors like depression, stress, anxiety, musculoskeletal health, and individual everyday quality of life significantly affect the HRQoL of dental specialists.

Endurance exercise training suppresses myostatin upregulation and nuclear factor-kappa B activation in a mouse model of Parkinson's disease

Background and Aim:

Muscle atrophy is common in Parkinson’s disease (PD). Although myostatin has been implicated in muscle atrophy, its expression in PD skeletal muscle has not been investigated. Therefore, this study aimed to elucidate the influence of PD induction and exercise training on myostatin expression in the gastrocnemius skeletal muscle.

Materials and Methods:

Thirty albino mice were randomly selected and separated into three groups of 10 mice each: Sedentary control, sedentary PD (SPD), and exercised PD (EPD). 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine and probenecid were used to induce chronic parkinsonism in the PD groups. Immunohistochemistry was used to investigate the expression of myostatin and nuclear factor kappa B (NF-kB) in gastrocnemius muscles of all three groups.

Results:

Myostatin expression and NF-kB nuclear localization, indicative of its activation, were significantly (p<0.01) higher in gastrocnemius skeletal muscle in the SPD group than in the control and EPD groups. Concomitantly, the average cross-sectional area of gastrocnemius muscle fibers in the SPD albino mice was significantly smaller (p<0.01) than in the control and EPD groups, indicating muscle atrophy.

Conclusion:

The present data are the first to indicate a correlation between PD induction and myostatin overexpression and NF-kB activation in the gastrocnemius muscle, potentially promoting the muscle atrophy commonly seen in PD. Additionally, the current data are the first to indicate the beneficial effects of exercise training on PD-associated myostatin overexpression, NF-κB activation, and muscle atrophy. Thus, our data are the first to suggest that myostatin and NF-κB might be regarded as potential therapeutic targets in an attempt to ameliorate skeletal muscle abnormalities commonly observed in PD.

Endurance exercise training suppresses Parkinson disease-induced overexpression of apoptotic mediators in the heart

BACKGROUNDWe have shown elevated levels of p53 and active caspase-3 in the heart with Parkinson disease (PD). The main aim of this study is to examine the effect of treadmill training on the cardiac expression of p53 and active caspase-3 in the mouse with induced Parkinsonism.

METHODS

Thirty randomly selected normal albino mice were equally divided into the following 3 groups: sedentary control (SC), sedentary Parkinson diseased (SPD), and exercised Parkinson diseased (EPD). 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and probenecid (MPTP/p) were used to induce chronic Parkinson disease in the SPD and EPD animals. The expression of p53 and active caspase-3 was investigated, using immunohistochemistry, in the heart in each animal group.

RESULTS

Both p53 and active caspase-3 expression was significantly (p value < 0.05) reduced in the PD heart following endurance exercise training.

CONCLUSION

Our present data suggest that chronic exercise training reduced PD-induced upregulation of p53 and active caspase-3 in the heart. Thus, our study suggests that inhibiting p53 and/or active caspase-3 may be considered as a therapeutic approach to ameliorate PD cardiomyopathy.