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Quantitative analysis of exogenous IGF-1 administration of intervertebral disc through intradiscal injection
- Source :
-
Journal of Biomechanics . Apr2012, Vol. 45 Issue 7, p1149-1155. 7p. - Publication Year :
- 2012
-
Abstract
- Abstract: Exogenous administration of IGF-1 has been proposed as a therapy for disc degeneration. The objectives of this study were to develop a numerical model for quantitatively analysing exogenous administration of IGF-1 into the intervertebral disc (IVD) via intradiscal injection and to investigate the effects of IGF-1 administration on distribution of glucose and oxygen in the IVD. In this study, the reversible binding reaction between IGF-1 and IGF binding proteins was incorporated into the mechano-electrochemical mixture model. The model was used to numerically analyse transport of IGF-1, glucose, oxygen and lactate in the IVD after IGF-1 administration. The enhancement of IGF-1 on lactate production was also taken into account in the theoretical model. The numerical analyses using finite element method demonstrated that the binding reactions significantly affect the time-dependent distribution of IGF-1 in the IVD. It was found that the region affected by IGF-1 was smaller and the duration of the therapeutic IGF-1 level was longer in the degenerated disc with a higher concentration of IGF binding proteins. It was also found that the IGF-1 injection can reduce glucose concentration and increase lactate accumulation (i.e., lower pH) in the IVD and these influences were regulated by the IGF-1 binding reactions. This study indicated the complexity of intradiscal administration of growth factors, which needs to be fully analysed in order to achieve a successful outcome. The new theoretical model developed in this study can serve as a powerful tool in analysing and designing the optimal treatments of growth factors for disc degeneration. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219290
- Volume :
- 45
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Biomechanics
- Publication Type :
- Academic Journal
- Accession number :
- 74309741
- Full Text :
- https://doi.org/10.1016/j.jbiomech.2012.02.005