PMID- 32256753 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231113 IS - 1792-0981 (Print) IS - 1792-1015 (Electronic) IS - 1792-0981 (Linking) VI - 19 IP - 4 DP - 2020 Apr TI - Decreased basal and stimulated salivary parameters by histopathological lesions and secretory dysfunction of parotid and submandibular glands in rats with type 2 diabetes. PG - 2707-2719 LID - 10.3892/etm.2020.8505 [doi] AB - Patients with type 2 diabetes mellitus (T2DM) present with dry mouth, polydipsia and taste impairment due to salivary secretion disorder. However, the underlying functional mechanism of T2DM remains unknown. The present study found that T2DM rats had significantly lower salivary flow rate and salivary alpha amylase activity, and attenuated salivary secretion responses to acid stimulation compared with control rats. Histopathological observation found that T2DM rats had inflammatory cell infiltration with increased expressions of IL-6 and TNF-alpha, oxidative stress, including decreased total superoxide dismutase activity and increased malondialdehyde content, and decreased expressions of beta1 adrenergic receptor, cholinergic receptor, aquaporin-5 and protein kinase A in salivary glands, in particular the parotid gland. These results indicated that parotid gland impairment was more severe compared with submandibular gland impairment. Reduced salivary secretion may be associated with histopathological lesions and decreased regulation in secretory pathways in salivary glands. CI - Copyright: (c) Chen et al. FAU - Chen, Si-Yu AU - Chen SY AD - Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China. FAU - Wang, Ying AU - Wang Y AD - Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China. FAU - Zhang, Chun-Lei AU - Zhang CL AD - Department of Stomatology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510632, P.R. China. FAU - Yang, Ze-Min AU - Yang ZM AD - Department of Biochemistry and Molecular Biology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China. LA - eng PT - Journal Article DEP - 20200210 PL - Greece TA - Exp Ther Med JT - Experimental and therapeutic medicine JID - 101531947 PMC - PMC7086285 OTO - NOTNLM OT - histopathological lesion OT - parotid glands OT - salivary parameters OT - secretory dysfunction OT - submandibular gland OT - type 2 diabetes mellitus EDAT- 2020/04/08 06:00 MHDA- 2020/04/08 06:01 PMCR- 2020/02/10 CRDT- 2020/04/08 06:00 PHST- 2019/05/24 00:00 [received] PHST- 2020/01/17 00:00 [accepted] PHST- 2020/04/08 06:00 [entrez] PHST- 2020/04/08 06:00 [pubmed] PHST- 2020/04/08 06:01 [medline] PHST- 2020/02/10 00:00 [pmc-release] AID - ETM-0-0-8505 [pii] AID - 10.3892/etm.2020.8505 [doi] PST - ppublish SO - Exp Ther Med. 2020 Apr;19(4):2707-2719. doi: 10.3892/etm.2020.8505. Epub 2020 Feb 10.