Abstract:
OBJECTIVES:Bisphosphonate-associated osteonecrosis of the jaw is a severe side effect in patients receiving nitrogen-containing bisphosphonates (N-BPs). One characteristic is its high recurrence rate; therefore, basic research for new therapeutic options is necessary. N-BPs inhibit the farnesylpyrophosphate synthase in the mevalonate pathway causing a depletion of the cellular geranylgeranyl pool, resulting in a constriction of essential functions of different cell lines. Geranylgeraniol (GGOH) has been proven to antagonise the negative biological in vitro effects of bisphosphonates. MATERIAL AND METHODS:This study analyses the influence of the isoprenoids eugenol, farnesol, R-limonene, menthol and squalene on different functions of zoledronate-treated human umbilicord vein endothelial cells (HUVEC), fibroblasts and osteogenic cells. In addition to the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl 2H-tetrazolium bromide (MTT) vitality test, the migration capacity was analysed by scratch wound assay and the morphological architecture of the treated cells by phallacidin staining. RESULTS:In contrast to GGOH, none of the other tested isoprenoids were able to prevent cells from having negative zoledronate effects. CONCLUSIONS:Despite structural analogy to GGOH, the investigated isoprenoids are not able to prevent the N-BP effect. The negative impact of zoledronate on fibroblasts, HUVEC and osteogenic cells is due to inhibition of protein geranylgeranylation since the substitution of squalene and farnesyl did not have any effect on viability and wound healing capacity whereas GGOH did reduce the negative impact. CLINICAL RELEVANCE:These data suggest the importance and exclusiveness of the mevalonate pathway intermediate GGOH as a potential therapeutic approach to bisphosphonate-associated osteonecrosis of the jaws.
journal_name
Clin Oral Investigjournal_title
Clinical oral investigationsauthors
Hagelauer N,Ziebart T,Pabst AM,Walter Cdoi
10.1007/s00784-014-1320-4subject
Has Abstractpub_date
2015-06-01 00:00:00pages
1079-91issue
5eissn
1432-6981issn
1436-3771journal_volume
19pub_type
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