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. 2015 Jan 1;8(1):719-26.
eCollection 2015.

Role of growth differentiation factor-5 and bone morphogenetic protein type II receptor in the development of lumbar intervertebral disc degeneration

Yi-Fan Li  1 , Xian-Zhong Tang  1 , Chao-Ge Liang  1 , Yao-Ming Hui  1 , Yun-Han Ji  1 , Wei Xu  1 , WenJun Qiu  1 , Li-Ming Cheng  2
Affiliations

Role of growth differentiation factor-5 and bone morphogenetic protein type II receptor in the development of lumbar intervertebral disc degeneration

Yi-Fan Li et al. Int J Clin Exp Pathol. .

Abstract

The present study was designed to evaluate the role of growth differentiation factor-5 (GDF-5) and bone morphogenetic protein type II receptor (BMPR-II) in the development of lumbar intervertebral disc degeneration (IDD). A total of 24 patients with lumbar IDD (experiment group) and 6 patients with lumbar vertebral fracture (control group) were enrolled in the study. Tissue samples of IVD from the experiment group and control group were obtained during lumbar fusion operation, respectively. Fixation and decalcification of IVD tissue were performed, and then HE staining was carried out to observe the morphological changes of the lumbar IVD tissues. The expression of GDF-5 and BMPRII in human lumbar IVD was detected by immunohistochemical staining. HE staining results showed that non- and minimal degeneration was found in 11 cases (score range, 0-3), moderate degeneration in 12 cases (score range, 4-8), and severe degeneration in 7 cases (score range, 9-12). According to the immunohistochemical results, the positive expression rates of GDF-5 and BMPRII in NP were higher than those in AF of the non- and minimal degeneration group, moderate degeneration group and severe degeneration group (all P < 0.05). However, no significant difference in GDF-5 or BMPRII positive expression was observed among the normal, non- and minimal, moderate and severe degeneration groups in neither NP area nor AF area (all P > 0.05). In conclusion, our results showed that GDF-5 and BMPRII expressed both in normal and degenerated IVD tissues, and GDF-5 might have an inhibition effect on degenerated lumbar IVD, suggesting that gene therapy may be a useful approach in producing physiological effects during early- and late-phase of lumbar IDD.

Keywords: Growth differentiation factor-5; bone morphogenetic protein type II receptor; intervertebral disc; lumbar intervertebral disc degeneration.

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Figures

Figure 1
Figure 1
H&E staining and histological grade of lumbar IVD tissue.
Figure 2
Figure 2
Immunohistochemical staining for GDF-5 and BMPRII in human lumbar IVD; brown indicates a positive reaction; GDF-5 (row A), BMPRII (row B).
See this image and copyright information in PMC

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