Abstract
Purpose
The aims of this study were to evaluate the effects of systemic administration of Salvia officinalis Linnaeus (L.) leaf extract on new bone formation in the expanded premaxillary suture in rats in vivo and to examine the antioxidant effects and phenolic profile of Salvia officinalis (SO) leaf and root extracts in vitro.
Methods
Fourteen male Sprague Dawley rats were allocated to two groups: SO group (n = 7) and control group (n = 7). An open-loop spring was attached to the upper incisors of each rat to expand the premaxillae. A 5-day expansion period followed by a 12-day retention period was observed. The rats in the SO group received systemic administration of 20 mg SO/kg/day via the orogastric route for 17 days. Histomorphometric examinations were carried out to examine the amount of new bone formation, number of capillaries, and intensity of inflammatory cell response. Immunohistochemical analysis was conducted to examine the number of osteoblasts and osteoclasts. Leaf and root extracts of SO were also analyzed for antioxidant activity and phenolic compounds in vitro.
Results
Statistical analysis showed that the following were higher in the SO group than in the control group: new bone formation, number of osteoblasts and osteoclasts, intensity of inflammatory cell response (neutrophils, lymphocytes, and macrophages), and number of capillaries. The major compound identified in SO leaf extract was rosmarinic acid, while luteolin derivatives, salvianolic acid F, and medioresinol were also present.
Conclusions
Salvia officinalis L. from leaf extract provided antioxidant effects and stimulated enhanced new bone formation in the expanded midpalatal suture after maxillary expansion in rats.
Zusammenfassung
Zielsetzung
Ziele dieser Studie waren die Bewertung der Auswirkungen einer systemischen Verabreichung von Salvia officinalis Linnaeus (L.) auf die Knochenneubildung in der erweiterten prämaxillären Naht bei Ratten unter In-vivo-Bedingungen sowie die Untersuchung der antioxidativen Wirkungen und des phenolischen Profils von Salvia officinalis(SO)-Extrakten unter In-vitro-Bedingungen.
Methoden
Vierzehn männliche Sprague-Dawley-Ratten wurden 2 Gruppen zugeordnet: SO- (n = 7) und Kontrollgruppe (n = 7). An den oberen Schneidezähnen jeder Ratte wurde eine offene Feder zur prämaxillären Erweiterung angebracht. Untersucht wurden eine 5‑tägige Expansionsperiode, gefolgt von einer 12-tägigen Retentionsdauer. Den Ratten in der SO-Gruppe wurde 17 Tage lang 20 mg SO/kg/Tag über eine orogastrale Sonde verabreicht. Histomorphometrische Untersuchungen wurden durchgeführt, um die Menge der Knochenneubildung, die Anzahl der Kapillaren und die Intensität der Entzündungszellen zu ermitteln, ferner eine immunhistochemische Analyse, um die Anzahl der Osteoblasten und Osteoklasten zu bestimmen. Blatt- und Wurzelextrakte von SO wurden zudem in vitro auf antioxidative Aktivität und phenolische Verbindungen analysiert.
Ergebnisse
Die statistische Analyse hat gezeigt, dass die Knochenneubildung, die Anzahl der Osteoblasten und Osteoklasten, die Intensität der Entzündungszellen sowie die Anzahl der Kapillaren in der SO-Gruppe höher waren als in der Kontrollgruppe. Die wichtigste im SO-Blattextrakt identifizierte Verbindung war Rosmarinsäure, zusätzlich waren Luteolinderivate, Salvianolsäure F und Medioresinol nachweisbar.
Schlussfolgerung
Der Salvia-officinalis-L.-Blattextrakt hatte antioxidative Wirkungen und stimulierte die erhöhte Knochenneubildung in der erweiterten mittleren Gaumennaht nach Expansion des Oberkiefers bei Ratten.
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Abbreviations
- ABTS:
-
2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)
- BHT:
-
Butylated hydroxytoluene
- DPPH:
-
2,2-diphenyl-1-picrylhydrazyl
- EDTA:
-
Ethylenediamine tetra-acetic acid
- HPLC:
-
High-performance liquid chromatography
- IC50 :
-
50% inhibitory concentration
- LC-MS/MS:
-
Liquid chromatography with tandem mass spectrometry
- RME:
-
Rapid maxillary expansion
- SO:
-
Salvia officinalis
- TEAC:
-
Trolox equivalent antioxidant capacity
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Funding
This study was supported by the Scientific Research Projects Commission (BAP) of Anadolu University (Eskisehir, Turkey; project number 1701S029).
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E. Kayalar, F. Goger, G. Tas Deynek, O.E. Tok and S. Kucuk declare that they have no competing interests.
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The animal experimental protocol in this study was approved by the Bezmialem Foundation University Institutional Review Board and Animal Use Committee (protocol no.: 2016/110). Consent for publication: Not applicable. Consent to participate: Not applicable.
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Kayalar, E., Goger, F., Tas Deynek, G. et al. New bone-generative effect of Salvia officinalis L. in the expanded midpalatal suture. J Orofac Orthop 83 (Suppl 1), 85–95 (2022). https://doi.org/10.1007/s00056-021-00366-3
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DOI: https://doi.org/10.1007/s00056-021-00366-3