Attaporn Prueksakorn1, Subin Puasiri2, Supanigar Ruangsri3, Anupong Makeudom4, Thanapat Sastraruji5, Suttichai Krisanaprakornkit5, Pattama Chailertvanitkul1. 1. Department of Restorative Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand. 2. Department of Community Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand. 3. Department of Oral Biology, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand. 4. Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand. 5. Center of Excellence in Oral and Maxillofacial Biology, Department of Oral Biology and Diagnostic Sciences, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Abstract
BACKGROUND/AIM: Tooth avulsion causes an injury to the periodontal ligament (PDL). The success of tooth replantation depends on the quantity and quality of PDL cells. The aim of this study was to examine the preservative and proliferative effects of Thai propolis extract, previously shown to exert anti-inflammatory and antioxidant activities, on human PDL cells. MATERIALS AND METHODS: Ninety-six premolars were left to air dry for 30 min and stored in Hank's balanced salt solution (HBSS), milk, or various concentrations of propolis extract from 0.25 to 10 mg ml-1 for 3 h. PDL cells were isolated by collagenase and trypsin digestion, and their viability was determined by a trypan blue dye exclusion assay. PDL tissues were also scraped off the root surface and cultured to determine cell growth and morphology. The alamarBlue® and BrdU assays were performed to determine the cytotoxic and proliferative effects of the extract on cultured PDL cells, respectively. RESULTS: A non-toxic dose of 2.5 mg ml-1 of propolis extract yielded the greatest percentage of cell viability (78.84 ± 3.34%), which was significantly higher than those of the other concentrations (P < 0.001). Nevertheless, this percentage was not significantly different from that of HBSS (80.14 ± 2.44%; P = 1.00), but was significantly higher than that of milk (71.27 ± 2.79%; P < 0.001). The cells grown from PDL explants looked like fibroblasts. However, 2.5 mg ml-1 of the extract did not induce PDL cell proliferation. CONCLUSION: Thai propolis extract at 2.5 mg ml-1 appears to be the most effective dose for preserving the viability of PDL cells, and this was comparable to HBSS.
BACKGROUND/AIM: Tooth avulsion causes an injury to the periodontal ligament (PDL). The success of tooth replantation depends on the quantity and quality of PDL cells. The aim of this study was to examine the preservative and proliferative effects of Thai propolis extract, previously shown to exert anti-inflammatory and antioxidant activities, on human PDL cells. MATERIALS AND METHODS: Ninety-six premolars were left to air dry for 30 min and stored in Hank's balanced salt solution (HBSS), milk, or various concentrations of propolis extract from 0.25 to 10 mg ml-1 for 3 h. PDL cells were isolated by collagenase and trypsin digestion, and their viability was determined by a trypan blue dye exclusion assay. PDL tissues were also scraped off the root surface and cultured to determine cell growth and morphology. The alamarBlue® and BrdU assays were performed to determine the cytotoxic and proliferative effects of the extract on cultured PDL cells, respectively. RESULTS: A non-toxic dose of 2.5 mg ml-1 of propolis extract yielded the greatest percentage of cell viability (78.84 ± 3.34%), which was significantly higher than those of the other concentrations (P < 0.001). Nevertheless, this percentage was not significantly different from that of HBSS (80.14 ± 2.44%; P = 1.00), but was significantly higher than that of milk (71.27 ± 2.79%; P < 0.001). The cells grown from PDL explants looked like fibroblasts. However, 2.5 mg ml-1 of the extract did not induce PDL cell proliferation. CONCLUSION: Thai propolis extract at 2.5 mg ml-1 appears to be the most effective dose for preserving the viability of PDL cells, and this was comparable to HBSS.
Authors: Jerry P Nolan; Ian Maconochie; Jasmeet Soar; Theresa M Olasveengen; Robert Greif; Myra H Wyckoff; Eunice M Singletary; Richard Aickin; Katherine M Berg; Mary E Mancini; Farhan Bhanji; Jonathan Wyllie; David Zideman; Robert W Neumar; Gavin D Perkins; Maaret Castrén; Peter T Morley; William H Montgomery; Vinay M Nadkarni; John E Billi; Raina M Merchant; Allan de Caen; Raffo Escalante-Kanashiro; David Kloeck; Tzong-Luen Wang; Mary Fran Hazinski Journal: Resuscitation Date: 2020-10-21 Impact factor: 6.251