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Journal List > J Korean Assoc Oral Maxillofac Surg > v.36(5) > 1032419

Kim, Jung, Shin, Kim, Kim, Kim, Hwang, Jung, Kim, and Kim: Effect of adipose-derived stem cells on bone healing on titanium implant in tibia of diabetes mellitus induced rats

Abstract

Introduction

Diabetes mellitus, as a major health problem for the elderly has been shown to alter the properties of the bone and impair bone healing around a titanium implant in both humans and animals. The aim of this study was to examine the effect of adipose-derived stem cells on the healing process around a titanium implant in streptozotocin-induced diabetic rats.

Materials and Methods

Thirteen rats were divided into two groups: adipose-derived stem cells injected group and a control group. A titanium screw implant (diameter: 2.0 mm, length: 3.5 mm) was placed into both tibia of 13 rats: 13 right tibia as the control group and 13 left tibia as the experimental group. The rats were sacrificed at different intervals (1, 2, and 4 weeks) after implantation for histopathology observations and immuno-histochemistric analysis.

Results

The histopathological findings revealed earlier new formed bone in the experimental group than the control group. In particular, at 1 week after implantation, the experimental group showed more newly formed bone and collagen around the implant than the control group. In immunohisto-chemistric analysis, osteoprotegerin (OPG) expression in the experimental group increased early compared to that of the control group until 2 weeks after implantation. However, after 2 weeks, OPG expression in the experimental group was similar to OPG expression in the control group. The receptor activator of nuclear factor κ B ligand (RANKL) expression in the experimental group increased early compared to that of the control group, and then decreased at 2 weeks. After 2 weeks, the level of RANKL expression was similar in both groups.

Conclusion

These results suggest that adipose-derived stem cells in implantation can promote bone healing around titanium, particularly in diabetes mellitus induced animals.

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jkaoms-36-392f1.tif
Fig. 1.
Blood sugar level test.
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Fig. 2.
Microphotograph of stem cell (Original magnification×100).
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Fig. 3.
Photo of stem cell injection.
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Fig. 4.
Photo of Implantation.
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Fig. 5.
Microphotograph at 1 week after implantation in control rat.(H&E staining, original magnification ×100)
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Fig. 6.
Microphotograph at 2 weeks after implantation in control rat.(H&E staining, original magnification ×100)
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Fig. 7.
Microphotograph at 4 weeks after implantation in control rat.(H&E staining, original magnification ×100)
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Fig. 8.
Microphotograph at 1 week after implantation in experimental rat.(H&E staining, original magnification ×100)
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Fig. 9.
Microphotograph at 2 weeks after implantation in experimental rat.(H&E staining, original magnification ×100)
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Fig. 10.
Microphotograph at 4 weeks after implantation in experimental rat.(H&E staining, original magnification ×100)
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Fig. 11.
Microphotograph at 1 week after implantation in control rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 12.
Microphotograph at 2 weeks after implantation in control rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 13.
Microphotograph at 4 weeks after implantation in control rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 14.
Microphotograph at 1 week after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 15.
Microphotograph at 2 weeks after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 16.
Microphotograph at 4 weeks after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100)
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Fig. 17.
Osteoproteogrin antibody reaction of regenerating bone at 1 week after implantation on tibia of the control rat. ×200.
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Fig. 18.
Osteoproteogrin antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the control rat. ×200.
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Fig. 19.
Osteoproteogrin antibody reaction of regenerating bone at 1 week after implantation on tibia of the Experimental rat. ×200.
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Fig. 20.
Osteoproteogrin antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Experimental rat. ×200.
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Fig. 21.
Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 1 weeks after implantation on tibia of the Control rat. ×200.
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Fig. 22.
Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Control rat. ×200.
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Fig. 23.
Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 1 weeks after implantation on tibia of the Experimental rat. ×200.
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Fig. 24.
Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Experimental rat. ×200.
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Table 1.
Osteoprotegerin (OPG) Expression after Implantation.
Periods after implantation control experimental group
1 week + +/++
2 week +/++ ++

(−: no immunoreactivity; +: weak but visible staining; ++: moderate staining; +++: strong staining intensity)

Table 2.
Receptor activator of nuclear factor kB ligand (RAN-KL) Expression after Implantaion
Periods after implantation control experimental group
1 week ++ ++/+++
2 week ++/+++ ++

(−: no immunoreactivity; +: weak but visible staining; ++: moderate staining; +++: strong staining intensity)

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