期刊
LASERS IN MEDICAL SCIENCE
卷 37, 期 9, 页码 3671-3679出版社
SPRINGER LONDON LTD
DOI: 10.1007/s10103-022-03651-8
关键词
5-Delta aminolevulinic acid; Photodynamic therapy; Osteoblasts; Protoporphyrin; Periodontitis; Light-emitting diode
资金
- Universita degli Studi G. D'Annunzio Chieti Pescara within the CRUI-CARE Agreement
- University of Chieti-Pescara Fund
- Ministry of Education, University, and Research (MIUR), Rome, Italy
- ALPHA Strumenti Srl, Melzo (MI), Italy
This study aimed to evaluate the effects of a new photodynamic protocol (ALAD-PDT) on primary human osteoblasts (hOBs). The results showed that ALAD-PDT enhanced cell proliferation and mineralized deposition, highlighting its potential for bone tissue regeneration.
This study aimed to evaluate the effects of a new photodynamic protocol (ALAD-PDT) on primary human osteoblasts (hOBs). The ALAD-PDT protocol consists of a heat-sensitive gel with 5% 5-delta aminolevulinic acid commercialized as Aladent (ALAD), combined with 630 nm LED. For this purpose, the hOBs, explanted from human mandible bone fragments, were used and treated with different ALAD concentrations (10%, 50%, 100% v/v) incubated for 45 min and immediately afterwards irradiated with a 630 nm LED device for 7 min. The untreated and unirradiated cells were considered control (CTRL). The cellular accumulation of the photosensitizer protoporphyrin IX (PpIX), the proliferation, the alkaline phosphatase (ALP) activity, and the calcium deposition were assessed. All concentrations (10, 50, 100%) determined a significant increment of PpIX immediately after 45 min of incubation (0 h) with the highest peak by ALAD (100%). The consequent 7 min of light irradiation caused a slight decrease in PpIX. At 48 h and 72 h, any increment of PpIX was observed. The concentration 100% associated with LED significantly increased hOB proliferation at 48 h (+46.83%) and 72 h (+127.75%). The 50% and 100% concentrations in combination to the red light also stimulated the ALP activity, +12.910% and +14.014% respectively. The concentration 100% with and without LED was selected for the assessment of calcium deposition. After LED irradiation, a significant increase in calcium deposition was observed and quantified (+72.33%). In conclusion, the ALAD-PDT enhanced proliferation, the ALP activity, and mineralized deposition of human oral osteoblasts, highlighting a promising potential for bone tissue regeneration.
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