PMID- 16440596 OWN - NLM STAT- MEDLINE DCOM- 20060302 LR - 20191109 IS - 1138-7548 (Print) IS - 1138-7548 (Linking) VI - 61 IP - 3 DP - 2005 Sep TI - Influence of streptozotocin-induced diabetes on hexokinase activity of rat salivary glands. PG - 421-7 AB - The influence of diabetes on the enzyme hexokinase (HK) was examined in the salivary glands of rats. Diabetes was induced by an intraperitoneal injection of streptozotocin (60 mg/Kg body weight) in overnight fasted rats (180-200 g). The animals were killed 48 hours and 30 days after the induction of diabetes and the submandibular and parotid salivary glands extracted for use. Hyperglycemia was evaluated by determining the blood sugar. The area occupied by each intralobular component, acini, ducts, total parenchyma and stroma was measured, and no differences were observed compared with control. In the soluble fraction of the submandibular gland, no difference in the specific activity of HK was observed, between the diabetic and control animals, however, the activity per gland and per g of tissue showed lower values than control. The specific activity of the bound form was reduced in the diabetic gland. The results obtained for the parotid gland were different from the submandibular. The specific activity of both the soluble and bound forms were increased in the diabetic animals. The DEAE-cellulose column chromatography of the soluble and bound forms of the enzyme from both glands showed a first peak appearing during the washing of the column and two other peaks were eluted by the gradient. Thus, three isoenzymes in the submandibular and parotid salivary glands for the control and diabetic rats have been found. FAU - Nogueira, F N AU - Nogueira FN AD - Oral Biology Research Center, Faculty of Dentistry, University of Sao Paulo, Brazil. FAU - Santos, M F dos AU - Santos MF FAU - Nicolau, J AU - Nicolau J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Spain TA - J Physiol Biochem JT - Journal of physiology and biochemistry JID - 9812509 RN - 5W494URQ81 (Streptozocin) RN - EC 2.7.1.1 (Hexokinase) SB - IM MH - Animals MH - Chromatography, DEAE-Cellulose MH - Diabetes Mellitus, Experimental/*enzymology MH - Hexokinase/*metabolism MH - Male MH - Rats MH - Rats, Wistar MH - Salivary Glands/*enzymology MH - Streptozocin EDAT- 2006/01/31 09:00 MHDA- 2006/03/03 09:00 CRDT- 2006/01/31 09:00 PHST- 2006/01/31 09:00 [pubmed] PHST- 2006/03/03 09:00 [medline] PHST- 2006/01/31 09:00 [entrez] AID - 10.1007/BF03168448 [doi] PST - ppublish SO - J Physiol Biochem. 2005 Sep;61(3):421-7. doi: 10.1007/BF03168448.