title: Lessons from in vitro perifusion of pancreatic islets isolated from 80 human pancreases.
abstract: We report the average insulin response to acute glucose measured by in vitro perifusion of pancreatic islets isolated from 80 consecutive human organs. Different perifusion parameters were considered [basal release, stimulation index (SI), time to peak, incremental area under the curve delta-AUC alpha)], and the correlation among them was determined. SI positively correlated with delta-AUC alpha (p < 0.001, r = 0.80) while negatively with time to peak (p < 0.05, r = -0.23). We also evaluated several variables of the isolation procedure that might affect responsiveness to glucose by human islets. Sex and age of pancreas donors, cold ischemia time, duration of the digestion, collagenase concentration, and lot characteristics (collagenase, trypsin, clostripain, and proteases activity), and final islet yield were considered. Multivariate regression analysis showed only an independent association between SI and the concentration of collagenase (p = 0.01).
authors.affiliation: Istituto Scientifico San Raffaele, Department of Surgery, University of Milan, Italy. bertuzzi.federico@hsr.it
authors.forename: F
authors.initials: F
authors.lastname: Bertuzzi
authors.forename: P
authors.initials: P
authors.lastname: Garancini
authors.forename: T C
authors.initials: TC
authors.lastname: Socci
authors.forename: R
authors.initials: R
authors.lastname: Nano
authors.forename: M V
authors.initials: MV
authors.lastname: Taglietti
authors.forename: M
authors.initials: M
authors.lastname: Santopinto
authors.forename: V
authors.initials: V
authors.lastname: Di Carlo
authors.forename: A M
authors.initials: AM
authors.lastname: Davalli
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005947:Glucose / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D007515:Islets of Langerhans / Q000187:drug effects / Q000378:metabolism*; D016381:Islets of Langerhans Transplantation; D008297:Male; D008875:Middle Aged; D010477:Perfusion
chemical_list: D005947:Glucose