Early effect of laser irradiation in signaling pathways of diabetic rat submandibular salivary glands

Author(s)

Fukuoka, Cintia Yuki ^[1] ; Vicari, Hugo Passos ^[1] ; Sipert, Carla Renata ^[2] ; Bhawal, Ujjal Kumar ^[3] ; Abiko, Yoshimitsu ^[3] ; Arana-Chavez, Victor Elias ^[1] ; Simoes, Alyne ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Dent, Dept Biomat & Oral Biol, Lab Oral Biol, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Dent, Div Endodont, Dept Restorat Dent, Sao Paulo - Brazil

^[3] Nihon Univ, Dept Biochem & Mol Biol, Sch Dent Matsudo, Matsudo, Chiba - Japan

• Document type: Journal article
• Source: PLoS One; v. 15, n. 8 AUG 4 2020.
• Web of Science Citations: 0

Abstract

Low-power laser irradiation (LPLI) is clinically used to modulate inflammation, proliferation and apoptosis. However, its molecular mechanisms are still not fully understood. This study aimed to describe the effects of LPLI upon inflammatory, apoptotic and proliferation markers in submandibular salivary glands (SMGs) in an experimental model of chronic disorder, 24h after one time irradiation. Diabetes was induced in rats by the injection of streptozotocin. After 29 days, these animals were treated with LPLI in the SMG area, and euthanized 24h after this irradiation. Treatment with LPLI significantly decreased diabetes-induced high mobility group box 1 (HMGB1) and tumor necrosis factor alpha (TNF-alpha) expression, while enhancing the activation of the transcriptional factor cAMP response element binding (CREB) protein. LPLI also reduced the expression of bax, a mitochondrial apoptotic marker, favoring the cell survival. These findings suggest that LPLI can hamper the state of chronic inflammation and favor homeostasis in diabetic rats SMGs. (AU)

• FAPESP's process: 14/21214-1 - Biomodulation effect of low level laser therapy in diabetes: action mechanism and dosimetry
• Grantee: Alyne Simões Gonçalves
• Support Opportunities: Regular Research Grants