During aging, wear, and tear of intervertebral discs, human discs undergo a series of morphological and biochemical changes. Degradation of extracellular matrix proteins, e.g., collagen, arises as an important contributor and accelerator in this process. Existing methods to detect collagen degradation at the tissue level include histology and immunohistochemistry. Unfortunately, most of these methods only depict overall collagen content without the ability to specifically discern degraded collagen and to assess the severity of degeneration. To fill this technological gap, we developed a robust and simple approach to detect and assess early disc degeneration with a collagen hybridizing peptide (CHP) that hybridizes with the flawed triple helix structure in degraded collagen. Intriguingly, the CHP signal in mouse lumbar discs exhibited a linear incremental pattern with age. This finding was corroborated with histological analysis based on established methods. When comparing this analysis, a positive linear correlation was found between CHP fluorescence intensity and the histological score with a regression value of r(2) = 0.9478. In degenerative mouse discs elicited by pro-inflammatory stimuli (IL-1 beta and LPS) ex vivo, the newly developed approach empowered prediction of the severity of disc degeneration. We further demonstrated higher CHP signals in a degenerative human disc tissue when compared to a normal sample. These findings also resonated with histological analysis. This approach lays a solid foundation for specific detection and assessment of intervertebral disc degeneration at the molecular level and will promote development of future disc regeneration strategies.
基金:
National Institute of Health NIAMS [R01AR064792, R21AR057.512]; Commonwealth Health Research Board (CHRB) Grant [207-10-18]; North American Spine Society (NASS); Department of Orthopedic Surgery at University of Virginia
第一作者单位:[1]Univ Virginia, Dept Orthopaed Surg, 135 Hosp Dr,Cobb Hall, Charlottesville, VA 22908 USA
通讯作者:
通讯机构:[1]Univ Virginia, Dept Orthopaed Surg, 135 Hosp Dr,Cobb Hall, Charlottesville, VA 22908 USA[5]Univ Virginia, Dept Biomed Engn, 415 Lane Rd, Charlottesville, VA 22904 USA
推荐引用方式(GB/T 7714):
Xiao Li,Majumdar Rahul,Dai Jun,et al.Molecular Detection and Assessment of Intervertebral Disc Degeneration via a Collagen Hybridizing Peptide[J].ACS BIOMATERIALS SCIENCE & ENGINEERING.2019,5(4):1661-1667.doi:10.1021/acsbiomaterials.9b00070.
APA:
Xiao, Li,Majumdar, Rahul,Dai, Jun,Li, Yang,Xie, Lin...&Li, Xudong.(2019).Molecular Detection and Assessment of Intervertebral Disc Degeneration via a Collagen Hybridizing Peptide.ACS BIOMATERIALS SCIENCE & ENGINEERING,5,(4)
MLA:
Xiao, Li,et al."Molecular Detection and Assessment of Intervertebral Disc Degeneration via a Collagen Hybridizing Peptide".ACS BIOMATERIALS SCIENCE & ENGINEERING 5..4(2019):1661-1667