In Treating Glucocorticoids Induced Osteoporosis in Temporomandibular Joint of Albino Rats; Which are More Effective Microvesicles or Mesenchymal Stem Cells? | ||||
| Egyptian Journal of Histology | ||||
| Article 13, Volume 43, Issue 3, September 2020, Page 849-862 PDF (2.57 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejh.2020.20936.1213 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Rehab Ali Abdel Moneim 1; Abeer Mostafa2; Marwa Magdy Saad Abbass  3
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| 1Oral biology department, faculty of dentistry, Cairo university and Future university in Egypt | ||||
| 2Medical Biochemistry and Molecular Biology, Faculty of medicine, Cairo University | ||||
| 36 Bahget st. Elnozha, Heliopolis | ||||
| Abstract | ||||
| Background: Osteoporosis is a systemic skeletal disorder that increases bone fragility and risk of fractures. Current medications for treating osteoporosis are associated with osteonecrosis due to their anti-angiogenic effect that leads to ischaemic and necrotic changes. Aim: The present research compared two new approaches in treating glucocorticoids induced osteoporosis in temporomandibular joints (TMJs) of albino rats; Microvesicles (MVs) and Mesenchymal stem cells (MSCs). Materials and Methods: 39 adult female albino rats were divided into 3 groups. All rats were intraperitoneally injected once daily throughout the experimental period (60 days); 13 rats with 9% saline and 26 rats with dexamethasone (200μg/100 g body weight). After 30 days; the first group (control group) received a local injection of 1 ml PBS in TMJs of both sides. Half the dexamethasone injected rats were locally injected in the right side TMJs with 1x107/ml/week MVs (Microvesicles group). The remaining rats (Stem cells group) received 1 million MSCs/ ml/week. In the later 2 groups, the left side TMJs received 1 ml PBS injection (untreated sides). The osteogenic potential was examined histologically, by western blotting, ELISA and RT-PCR. Results: Histologically; both sides from MSCs group exhibited abnormal configuration of the joint’s anatomy while a marked improvement of bone architecture in the microvesicles treated TMJs was detected. Treated sides in both groups (MVs, MSCs) showed a significant increase in osteogenic markers (ALP, BMP and RUNX-2) and a decrease in inflammatory markers (IL-1β, TNF-α, IL-6) as well as in RANKL expression as compared to untreated ones. Conclusion: Microvesicles treated TMJs showed an enhanced pattern of bone regeneration confirmed by the higher mean bone area % as compared to MSCs group. On the contrary, MSCs treated TMJs showed a significantly elevated level of osteogenic markers; yet the osteogenic reactivity was very aggressive that caused deformity to the TMJ architecture. | ||||
| Keywords | ||||
| Dexamethasone; mesenchymal stem cells; microvesicles; osteoporosis; TMJ | ||||
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