Methimazole: an alternative route of administration

Methimazole was administered orally and rectally in a single dose of 60 mg to six euthyroid volunteers (three females and three males). Blood levels of methimazole were the same whether administered by the oral or rectal route, with peak levels of 1184 +/- 118 and 1163 +/- 150 (+/-SEM) ng/ml respectively. This study provides evidence that the rectal administration of methimazole may be an alternative to treating hyperthyroid patients who are unable to take this drug by mouth.

Seminal SIRT1 expression in infertile oligoasthenoteratozoospermic men with varicocoele

In a case-controlled study, we assessed the expressed seminal NAD-dependent protein deacetylase (SIRT1) expression in infertile oligoasthenoteratozoospermic (OAT) men associated with varicocoele. Our study involved 81 men, recruited from the University hospitals, after ethical approval and informed consent. They were allocated into fertile normozoospermic men (n = 23), infertile OAT men without varicocoele (n = 23) and infertile OAT men with varicocoele (n = 35). Inclusion criteria consisted of confirmation of abnormal semen parameters and normal female partners whereas exclusion criteria were leukocytospermia, tobacco smoking, hormonal therapy, immunological disorders, dyslipidemia, hypogonadism, cardiovascular disorders, morbid obesity, and hepatic or renal failures. All participants had an interview to assess clinical history, clinical examination, semen analysis, and estimation of seminal SIRT1 expression. Seminal SIRT1 expression was significantly lower in infertile OAT men than fertile men. Among infertile OAT men, seminal SIRT1 expression was significantly lower in those with varicocoele than in those without. Additionally, seminal SIRT1 expression was significantly lower in varicocoele grade III cases compared with other grades. Seminal SIRT1 expression was positively correlated with sperm concentration (r = 0.327, p = 0.001), total sperm motility (r = 0.532, p = 0.001), and sperm normal forms (r = 0.469, p = 0.001). Our results suggest that seminal SIRT1 expression has a role of male infertility being significantly decreased in infertile OAT men in general and in infertile OAT men associated with varicocoele in particular.

Cholinergic but not serotonergic mediation of exercise-induced growth hormone secretion

In order to clarify the roles of cholinergic and serotonergic neurotransmission in the mediation of exercise-induced growth hormone (GH) release, normal young volunteers of both sexes were studied. Exercise was for 20 minutes at 800 kpm for the men and 500 kpm for the women. Pretreatment with 0.4 mg atropine 1 hour prior to exercise, or with methysergide 2 mg po q 6 h for 48 hours prior to exercise, were used to evaluate the influence of cholinergic and serotonergic blockade, respectively. Five of the ten men studied failed to raise GH values with exercise, perhaps because the exercise was not vigorous enough for their high degree of fitness. Of three non-responders restudied, at the same workload, one responded on the second occasion. The mean peak GH with exercise 13.4 +/- 3.27 ng/ml, was reduced to 2.4 +/- 1.28 ng/ml (p less than 0.01) after atropine, but was unaffected by methysergide (15.2 +/- 6.58 ng/ml, p greater than 0.5). Prolactin did not rise with exercise, and was not affected by atropine, but lowered by methysergide as expected. Cholinergic neurotransmission therefore represents a key link in exercise-induced GH secretion, but serotonergic influences are probably not involved.

Pathophysiology of the Risk Factors Associated with Osteoporosis and their Correlation to the T-score Value in Patients with Osteopenia and Osteoporosis in the United Arab Emirates

Introduction:

Osteoporosis is a growing major health problem with medical, social, and economic burden. The pathogenesis of osteoporosis involves excessive bone resorption by osteoclasts and decreased new bone formation by osteoblasts. Early diagnosis is the key to minimize the impact of osteoporosis on patients. Dual-energy X-ray absorptiometry at the hip or spine is the main standard test for measuring bone mineral density, and according to the World Health Organization, the T-score value of –2.5 or less determines osteoporosis.

Aim:

In this work, we aimed to study the risk factors associated with osteoporosis among a population sample of osteoporotic and controls in the United Arab Emirates (UAE) and relate them to the T-score value.

Material and Methods:

Two hundred male and female participants were recruited in the study. A questionnaire was used and data were correlated with the T-score value of the participants.

Results:

Results showed a positive correlation between the T-score value of the patients with osteoporosis and their calcium intake, exercise duration, and the age at menopause of female patients, whereas a negative correlation was evident between the T-score value and both caffeine and nicotine consumption. Results also revealed that patients with osteoporosis have significantly low body mass index, low calcium intake, and shorter duration of exposure to the sun than the control group.

Conclusion:

In conclusion, more intervention should be directed toward changing the modifiable risk factors in patients with osteoporosis and more studies should be directed toward osteoporosis in the UAE.

Optimizing mHealth Interventions for Children's Oral Hygiene: A Factorial Trial

Behavioral interventions can improve children's oral hygiene practices. The multiphase optimization strategy (MOST) offers a framework to prepare, optimize, and evaluate behavioral interventions. This optimization trial tested 3 intervention components-brief motivational interviewing (MI), storytelling videos (STVs), and oral health promotion messages (OHPMs)-in enhancing mother's self-reported brushing of their preschool children's teeth. A total of 128 mothers with children <5 y old were included in a 23 factorial trial. The primary outcome was children's plaque accumulation, assessed using the modified Plaque Index of Silness and Löe, with scores ranging from 0 to 3. The secondary outcome was mothers' self-reported frequency of brushing their children's teeth, categorized as at least once daily or less than once daily. Mothers were randomized to 8 experimental conditions based on combinations of on-off levels of the 3 components. Linear regression and generalized linear regression with logit link function were used to assess the impact of the components and their interactions on plaque score and daily toothbrushing after 3 mo. Multiple imputation was used for missing values. The principle of effect hierarchy guided the selection of components for inclusion in the optimized package, giving priority to main effects and 2-way over 3-way interactions. Plaque was reduced from mean = 1.8 at baseline to mean = 1.5 and daily toothbrushing increased from 50.8% to 69.5% after 3 mo. MI led to non-significantly less plaque and non-significantly more daily toothbrushing. Combining OHPMs and STVs together without MI canceled each other. Neither the main effects nor the 2- or 3-way interactions significantly affected the 2 outcomes. Individual or combined components did not significantly reduce plaque or increase daily toothbrushing. MI had the greatest promise for behavior change, and the m-oral health components need modification before they can be combined with MI in a health promotion package.

Peroxisome proliferator-activated receptor gamma, a possible culprit in mycosis fungoides: an immunohistochemical study

BACKGROUND

It still remains debatable whether peroxisome proliferator-activated receptor gamma (PPARγ) is pro- or antineoplastic, and its exact role in mycosis fungoides (MF) remains unclear.

OBJECTIVE

This prospective comparative study aimed to investigate the expression of PPARγ in MF and compare it with psoriatics and controls in a trial to deduce its possible role in MF. Also, we tried to clarify the relation between PPARγ and Bcl-2 in MF.

METHODS

Twenty MF patients, 20 psoriatic patients and 20 controls were included. All participants underwent a skin biopsy, and immunohistochemical staining for both PPARγ and Bcl-2 were performed. Western blot analysis was performed for detection of both PPARγ and Bcl-2.

RESULTS

The mean area per cent of PPARγ measured in the MF patients (57.1217±9.502417) was significantly higher (P<0.001) when compared with that of both the psoriatics (2.989±1.723) and controls (35.9357±8.1789). The mean area per cent of Bcl-2 in MF patients (9.3763±6.6328) was significantly higher (P<0.001) than that of both the psoriatics (2.35±1.35) and the controls (0.73105±0.5302)]. Our results were confirmed using the western blot analysis. We detected a highly significant positive correlation between the PPARγ and Bcl-2 mean area per cents in all patients. In our MF patients, both parameters were also positively correlated with the age of the patient, duration and stage of MF (P<0.05).

CONCLUSION

Our data suggest a possible role for PPARγ in the pathogenesis of MF possibly through several mechanisms, one of which might be conferring upon the lymphoma cells, a survival advantage at least partially through up regulating Bcl-2.