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Baleen whales are vulnerable to environmental impacts due to low fecundity, capital breeding strategies, and their reliance on a large amount of prey resources over large spatial scales. There has been growing interest in monitoring health and physiological stress in these species but, to date, few measures have been validated. The purpose of this study was to examine whether blubber cortisol could be used as a measure of physiological stress in humpback whales. Cortisol concentrations were initially compared between live, presumably 'healthy' whales (n = 187) and deceased whales (n = 35), which had died after stranding or entanglement, or washed ashore as a carcass. Deceased whales were found to have significantly higher cortisol levels (mean ± SD; 5.47 ± 4.52 ng/g) than live whales (0.51 ± 0.14 ng/g; p less then 0.001), particularly for those animals that had experienced prolonged trauma (e.g. stranding) prior to death. Blubber cortisol levels in live whales were then examined for evidence of life history-related, seasonal, or sampling-related effects. Life history group and sampling-related factors, such as encounter time and the number of biopsy sampling attempts per animal, were found to be poor predictors of blubber cortisol levels in live whales. In contrast, blubber cortisol levels varied seasonally, with whales migrating north towards the breeding grounds in winter having significantly higher levels (0.54 ± 0.21 ng/g, p = 0.016) than those migrating south towards the feeding grounds in spring (0.48 ± 1.23 ng/g). These differences could be due to additional socio-physiological stress experienced by whales during peaks in breeding activity. Overall, blubber cortisol appears to be a suitable measure of chronic physiological stress in humpback whales. In orange-spotted grouper, androgen can promote the development of testis and spermatogenesis, but the effect of androgen on testis development is unclear. Forkhead box L 3 (Foxl3) is important in the development of fish testis. Rec8 and fbxo47 are involved in meiosis, which impacts spermatogenesis. The present study investigated the plausible role of testis development through the Foxl3 transcriptional regulation of rec8 and fbxo47. The results of tissue distribution showed that rec8 and fbxo47 are highly expressed in gonad. In addition, the highest expression of foxl3, rec8, and fbxo47 was in the testis and intersex compared with the other stages of gonadal development, suggesting that foxl3, rec8, and fbxo47 are important in testis development. In addition, by using dual-luciferase assays, we found that the androgen can increase foxl3 promoter activity and Foxl3 can upregulate rec8 and fbxo47 promoter activity. Furthermore, the addition of β-testosterone significantly increased foxl3, rec8, and fbxo47 promoter activity. Together, these results suggest that foxl3 plays a decisive role in testis development by regulating the expression of rec8 or fbxo47 and imply that AR-foxl3-rec8/fbxo47 affects the testis development pathway. BACKGROUND Anti-centromere auto-antibodies (ACA) have been described as a marker in Systemic sclerosis (SSc) disease. CENP-B is the major centromere auto-antigen recognized by SSc patients with positive ACA. Our aim was to characterize the major epitope involved in the anti-CENP-B immune response of Moroccan SSc patients. PATIENTS AND METHOD For identification of SSc biomarkers, 80 sera from patients with SSc and systemic lupus erythematosus (SLE) were screened by indirect immunofluorescence test (IIF) to assess the presence of ANA reactivity. Immunoblotting analysis was performed for 11 sera with positive ACA using the N-terminal and C-terminal region of CENP-B protein as antigens. RESULTS 29 out of 30 (96, 66 %) patients with SSc had positive ANA. 11 out of 30 (36, 67 %) patients were ACA positive and 6 of them produced auto-antibodies against Nt-CENPB antigen. Two of these 6 Nt-CENPB positive sera produced also other auto-antibodies associated to primary biliary cirrhosis. None of all sera tested showed reactivity against Ct-CENPB. CONCLUSION Our data showed, for the first time in Morocco, that the Nt-CENPB contains a major epitope for Moroccan SSc patients. These findings could provide additional information that would contribute to improving the diagnosis and management of these patients. The highly variable physiological conditions within the gastrointestinal tract can cause variable drug release and absorption from the orally administrated dosage forms. https://www.selleckchem.com/products/kp-457.html The emptying of the gastric content is one of the most critical physiological processes, dictating the amount of the active ingredient available for absorption into the systemic circulation. In this study, we prepared two water gastric emptying regimes on advanced gastric simulator (AGS) with programmable "pyloric" valve. Gastric emptying regimes were designed in such a way to capture the main findings of the MRI (magnetic resonance imaging) in vivo studies, conducted under fasted conditions according to the EMA and FDA guidelines for bioavailability and bioequivalence studies. Four immediate release formulations containing a model drug of BCS class III were tested. Comparative dissolution tests were also performed with the USP2 apparatus. In vitro release profiles were compared to the in vivo data in order to evaluate the importance of gastric emptying for subsequent absorption of the active substance from the tested formulations. Our bio-relevant in vitro dissolution model showed good discriminatory power for all of the tested formulations. Moreover, a better relation to in vivo data was achieved with AGS with respect to the tested conventional dissolution method. For establishing a precise system for predicting in vivo bioavailability following intranasal (IN) administration, the relationships among membrane permeability of drugs across Calu-3 cells, in situ nasal mucosal drug permeation rate, and in vivo drug absorption following IN administration were quantified. The membrane permeability coefficient (Papp) was determined for sixteen model drugs by in vitro permeation studies in Calu-3 cells. The drug permeation rate constant through the nasal mucosa (kn) was calculated from the in situ nasal perfusion of the drug solutions in rats. Bioavailability following IN administration of six model drugs with different membrane permeabilities were determined by in vivo drug absorption studies in rats. The correlations among in vitro membrane permeability properties, in situ nasal mucosal drug permeation rate, and in vivo drug absorption following IN administration, were assessed. The significant correlation between the in vitro Calu-3 cell permeability and nasal mucosal drug permeation rate (r2 = 0.
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