Salivary biomarkers of obstructive sleep apnea syndrome in children.

OBJECTIVES: The present pilot study was performed to evaluate the HPA axis and ANS activity by measuring salivary cortisol and α-amylase diurnal trajectory and production, respectively, in mild or moderate-to-severe (MS) OSA-affected, but otherwise healthy, children. Moreover, a correlative analysis was performed between the salivary biomarker concentrations and the PSG variables characterizing the OSA severity. METHODS: We studied 27 consecutive OSA patients (13 mild OSA; 14 MS OSA) and seven healthy children who were enrolled as controls by collecting salivary samples and measuring cortisol and α-amylase levels using enzyme-linked bioassays. RESULTS: Compared with controls, both mild and MS OSA children showed: (1) increased salivary cortisol diurnal production, (2) maintenance of the physiological circadian activity of the HPA axis, and (3) no changes in α-amylase diurnal trajectory and production. In addition, morning salivary cortisol concentrations was negatively associated with the disease severity in the MS OSA group. CONCLUSIONS: OSA is associated with dysregulation of the HPA axis activity in children, the latter potentially underlying some of the adverse consequences of the disease.

Menopausal symptoms after the discontinuation of long-term hormone replacement therapy in women under 60: a 3-year follow-up.

BACKGROUND: Prescriptions for hormone replacement therapy (HRT) declined following the publication of the Women's Health Initiative study. The number of women who experience recurrence of menopausal symptoms after discontinuation of long-term HRT (LT-HRT), the length of time these symptoms last and the preferred alternative treatments remain unknown. METHODS: This prospective 3-year follow-up study analyses the prevalence and intensity of menopausal symptoms that occur in young postmenopausal women who discontinued LT-HRT. Symptoms were evaluated using the Menopause Rating Scale. RESULTS: Women (254) who discontinued LT-HRT (mean use: 6.9 ± 2.3 years) were recruited. Mean age at menopause was 48.1 ± 3.4 years. Mean age at discontinuation was 56.8 ± 3.7 years. 23% of the women were lost to follow-up. Of the remaining 196 women, 93% experienced a recurrence of menopausal symptoms within the first year, 25% resumed low-dose HRT, 62% used vaginal estrogens, 54% used phytoestrogens, and 2% used alternative therapies. A decrease in symptom prevalence and intensity was observed during the 3-year follow-up. CONCLUSIONS: Symptoms re-appeared in a significant proportion of patients within the first year after discontinuation of LT-HRT. However, after 3 years, the majority of these women were asymptomatic. Patients who discontinue LT-HRT may require a more detailed follow-up immediately after the discontinuation of treatment.

In vitro and in vivo study of cucurbitacins-type triterpene glucoside from Citrullus colocynthis growing in Saudi Arabia against hepatocellular carcinoma.

Chromatographic investigation of fruits obtained from Citrullus colocynthis, growing in Saudi Arabia, led to isolation of two compounds; Cucurbitacin E glucoside (Cu E, 1), and Cucurbitacin I glucoside (Cu I, 2). The chemical structures of 1 and 2, were elucidated by spectroscopic analyses include; 1D ((1)H and (13)C) and 2D (COSY, HMQC and HMBC) NMR and ESI-MS spectroscopy. The in vitro cytotoxic activity against hepatoma cell line (HepG2) and mice-bearing tumor of Ehrlich's ascites carcinoma (EAC) of the compounds were estimated. Both compounds had potent inhibitory activity on HepG2 with IC(50) 3.5 and 2.8 nmol/mL, respectively. In addition to these activities, the in vivo study employing EAC, showed the capability of both compounds to prolong the survival time, life span and normalize the biochemical parameters of the infected mice with EAC.

Effects of the administration of corticosterone, parathyroid hormone, or both, and of their withdrawal, on rat bone and cartilage histomorphometric parameters, and on osteoprotegerin and RANKL mRNA expression and proteins.

We have studied the effects of the treatment with corticosterone (CORT), parathyroid hormone (PTH), or both (CORT + PTH), and of their withdrawal (CORT-rec and CORT + PTH-rec), on the osteoprotegerin (OPG) and receptor activator of nuclear factor-kB ligand (RANKL) localization and expression and on histomorphometric parameters in primary and secondary spongiosa of rat femur and tibia metaphyses. In the secondary spongiosa of the CORT group, the bone remodeling and the OPG/RANKL mRNA ratio decreased. In the PTH group, the bone turnover and the structural and connectivity indices increased, and the OPG/RANKL mRNA ratio fell; this ratio rose, however, in the primary spongiosa. In the CORT + PTH group, remodeling values intermediate between those of the CORT and PTH groups, were detected in the secondary spongiosa, where OPG and RANKL mRNA rose. Return towards control values was found in the recovery groups. The Cartilage Growth Plate Width was reduced in the CORT and CORT + PTH groups and returned to normal values in the recovery groups, while it was not affected by PTH. Independently of treatments, both OPG and RANKL mRNA and proteins were co-localized in the same cartilage and bone cells and in several bone marrow cells. In conclusion, the catabolic effects induced by CORT treatment occur together with an OPG fall and a RANKL rise. In the PTH group in which the bone turnover increase, the OPG and RANKL mRNA expressions differ in the primary and secondary spongiosa, confirming that the bone tissue in these sites can have different metabolic trends.