Some multicellular glands are tubular and extrude their secretion into a central space or lumen; some, like the oil-producing sebaceous glands of mammals, form their product by complete breakdown of the cells, a method of secretion known as holocrine.
Norepinephrine, an α-adrenergic agonist, stimulates discharge of the type I granular gland by a holocrine method of secretion with discharge of cellular mRNA [ 24, 25].
A different method of secretion drainage is the Mucus Slurper, a modified tube equipped with multiple aspirating holes opening on the tip of the ETT.
Aralar1-overexpressing cells therefore secreted significantly more insulin than control LacZ-transduced cells upon stimulation with 16.7 mmol/l D-glucose, and the magnitude of the increase from Aralar1-overexpressing cells over LacZ-overexpressing cellsol cells was similar between the two methods of reporting secretion.
This case illustrates the capricious nature of Cushing's disease and demonstrates the necessity of both keeping a differential diagnosis in mind, and the utility of using different methods of assessing cortisol secretion in this diagnostically challenging condition.
The temporary confinement of the volume into which proteins are secreted enhances the sensitivity of the method for low rates of secretion, and makes the measurements more robust across a range of dissociation constants for the capture ligand, compared to open-well configurations.
We found that secretion measured with TIRF-Microscopy is representative of the overall secretion of the cells, thereby validating for the first time the TIRF method as a measure of secretion.
Insulin resistance and β-cell function are major predictors of type 2 diabetes, but studies using direct methods of insulin resistance and secretion are few and relatively small.
Our studies do not rule out the possibility that SNAP23 also participates in constitutive secretion of housekeeping proteins in epithelial secretory cells, nor that low levels of SNAP23 below the limits of our methods of detection mediate constitutive secretion in non-secretory epithelial cells.
The method to increase the efficiency of secretion is to fuse a nucleotide sequence encoding the antigenic protein to a nucleotide sequence encoding the synthetic peptide LEISSTCDA (Guimaraes et al. 2006).
