The present study analyzed, the influence of the treatment with juvenile hormone on the ultrastructure of Apis mellifera L. workers' venom glands. Newly emerged workers received topical application of 1 microl of juvenile hormone diluted in hexane, in the concentration of 2 microg/pl. Two controls were used; one control received no treatment (group C1) and other received topical application of ...

PURPOSE Live/killed mycobacteria and culture supernatants can suppress asthmatic reactions. This study investigated whether mycobacterial secretory proteins have therapeutic effects on asthma. METHODS Mycobacterium bovis bacille Calmette-Guérin (BCG; 2×10(5) CFUs) and mycobacterial secretory proteins (Ag85 complex, 38-kDa protein or MPB70; 4 or 20 µg) were administered intraperitoneally to fe...

In children with obesity, insulin hypersecretion is proposed to precede resistance. We investigated if metformin could be used attenuate secretion from palmitate-treated isolated islets and its implication for obesity. Human were exposed palmitate 0.5 or 1 day, when was introduced. After culture, glucose-stimulated (GSIS) measured. Children who had received over six months (n = 21, age 13.9 ± 1...

Picornaviruses replicate their genomes in association with cellular membranes. While enteroviruses are believed to utilize membranes of the early secretory pathway, the origin of the membranes used by foot-and-mouth disease virus (FMDV) for replication are unknown. Secretory-vesicle traffic through the early secretory pathway is mediated by the sequential acquisition of two distinct membrane co...

Neuropeptides are released into the extracellular space from large secretory granules. In order to reach their release sites, these granules are translocated on microtubules and thought to interact with filamentous actin as they approach the cell membrane. We have used a green fluorescent protein-tagged neuropeptide prohormone (prepro-orphanin FQ) to visualize vesicle trafficking dynamics in NS...

BACKGROUND Bisphenol A (BPA) exposure early in life results in organizational changes in reproductive organs, but the effect of BPA on conducting airway cellular maturation has not been studied. Late gestation is characterized by active differentiation of secretory cells in the lung epithelium. OBJECTIVE We evaluated the hypothesis that BPA exposure disrupts epithelial secretory cell developm...

Glycogen and its products of metabolism are considered to be the most important and direct source of nutrient for the early conceptus. The premenstrual biopsies were taken from 100 women with primary infertility whose male partners had normal semenograms. The biopsies were then subjected to Haematoxylin and Eosin (H & E) and Periodic Acid Schiff (PAS) staining with and without diastase to study...

Mesenchymal stem cells (MSCs) play important roles in tissue repair and cancer progression. Our recent work suggests that some mesenchymal cells, notably myofibroblasts exhibit regulated exocytosis resembling that seen in neuroendocrine cells. We now report that MSCs also exhibit regulated exocytosis. Both a G-protein coupled receptor agonist, chemerin, and a receptor tyrosine kinase stimulant,...