Isolation and purification of human islet cells with semi-automated digestion.
- Author:
Hua ZHANG
1
;
De-hong CAI
;
Jun-ling HAN
;
Guo-hong WEI
;
Jia SUN
;
Wei-ping SUN
;
Jian ZHANG
;
Hong CHEN
;
Long-yi ZENG
;
Jian-ping WENG
Author Information
- Publication Type:Journal Article
- MeSH: Cell Count; Cell Separation; instrumentation; methods; Cell Survival; Glucose; pharmacology; Humans; Insulin; secretion; Islets of Langerhans; cytology; drug effects; metabolism; Reproducibility of Results
- From: Journal of Southern Medical University 2007;27(6):824-826
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo establish an semi-automated effective method for large-scale purification of islet cells from human pancreas.
METHODSHuman pancreas tissue was digested with collagenase P using a semi-automated pancreas-digestion system followed by purification in a HCA-Ficoll continuous gradient using Cobe2991 cell separator. After isolation, the islet cell yield and purity was evaluated with light microscope with DTZ staining, and the islet function assessed by insulin release assay in vitro.
RESULTSThe number of the islets collected from each pancreas averaged 38 6201-/+78 219 islet equivalents (IEQ) before purification, and 231 420-/+28 054 IEQ after the purification with discontinuous gradient centrifugation. From each gram of the pancreatic tissue, 3148-/+317 IEQ were obtained with an average purity of (62.81-/+2.68) %. The purified islets responded well to high-concentration (16.7 mmol/L) glucose stimulation with a 2.53-fold increase of insulin secretion over the basal level (3.3 mmol/l, P<0.001).
CONCLUSIONThe established semi-automated method can be applicable for large-scale purification of fully functional islet cells from human pancreas.
