Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats
Abstract Minimally invasive techniques and biological autograft alternatives such as the bone morphogenetic proteins (BMPs) can reduce morbidity associated with spinal fusions. This study was a proof-of-concept for gene-therapy-mediated anterior spine fusion that could be adapted to percutaneous tec...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21208-1 |
| _version_ | 1828339445952151552 |
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| author | Matthew E. Cunningham Natalie H. Kelly Bernard A. Rawlins Oheneba Boachie-Adjei Marjolein C. H. van der Meulen Chisa Hidaka |
| author_facet | Matthew E. Cunningham Natalie H. Kelly Bernard A. Rawlins Oheneba Boachie-Adjei Marjolein C. H. van der Meulen Chisa Hidaka |
| author_sort | Matthew E. Cunningham |
| collection | DOAJ |
| description | Abstract Minimally invasive techniques and biological autograft alternatives such as the bone morphogenetic proteins (BMPs) can reduce morbidity associated with spinal fusions. This study was a proof-of-concept for gene-therapy-mediated anterior spine fusion that could be adapted to percutaneous technique for clinical use. Isogeneic bone marrow stromal cells genetically programmed to express b-galactosidase (LACZ, a marker gene), BMP2, BMP7, a mixture of BMP2 and BMP7 infected cells (homodimers, HM), or BMP2/7 heterodimers (HT) were implanted into the discs between lumbar vertebrae 4 and 5 (L4/5) and L5/6 of male Lewis rats. Spine stiffening was monitored at 4, 8 and 12 weeks using noninvasive-induced angular displacement (NIAD) testing. At 12 weeks isolated spines were assessed for fusion and bone formation by palpation, biomechanical testing [four-point bending stiffness, moment to failure in extension, and in vitro angular displacement (IVAD)], faxitron x-rays, microCT, and histology. Progressive loss of NIAD occurred in only the HT group (p < 0.001), and biomechanical tests correlated with the NIAD results. Significant fusion occurred only in the HT group (94% of animals with one or both levels) as assessed by palpation (p < 0.001), which predicted HT bone production assessed by faxitron (p ≤ 0.001) or microCT (p < 0.023). Intervertebral bridging bone was consistently observed only in HT-treated specimens. Induced bone was located anterior and lateral to the disc space, with no bone formation noted within the disc. Percutaneous anterior spine fusions may be possible clinically, but induction of bone inside the disc space remains a challenge. |
| first_indexed | 2024-04-13T22:42:49Z |
| format | Article |
| id | doaj.art-a75db7759e544e68ae5ba078ed980efa |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T22:42:49Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a75db7759e544e68ae5ba078ed980efa2022-12-22T02:26:33ZengNature PortfolioScientific Reports2045-23222022-10-0112111410.1038/s41598-022-21208-1Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis ratsMatthew E. Cunningham0Natalie H. Kelly1Bernard A. Rawlins2Oheneba Boachie-Adjei3Marjolein C. H. van der Meulen4Chisa Hidaka5HSS Research Institute, Hospital for Special SurgeryHSS Research Institute, Hospital for Special SurgeryHSS Research Institute, Hospital for Special SurgeryHSS Research Institute, Hospital for Special SurgeryHSS Research Institute, Hospital for Special SurgeryHSS Research Institute, Hospital for Special SurgeryAbstract Minimally invasive techniques and biological autograft alternatives such as the bone morphogenetic proteins (BMPs) can reduce morbidity associated with spinal fusions. This study was a proof-of-concept for gene-therapy-mediated anterior spine fusion that could be adapted to percutaneous technique for clinical use. Isogeneic bone marrow stromal cells genetically programmed to express b-galactosidase (LACZ, a marker gene), BMP2, BMP7, a mixture of BMP2 and BMP7 infected cells (homodimers, HM), or BMP2/7 heterodimers (HT) were implanted into the discs between lumbar vertebrae 4 and 5 (L4/5) and L5/6 of male Lewis rats. Spine stiffening was monitored at 4, 8 and 12 weeks using noninvasive-induced angular displacement (NIAD) testing. At 12 weeks isolated spines were assessed for fusion and bone formation by palpation, biomechanical testing [four-point bending stiffness, moment to failure in extension, and in vitro angular displacement (IVAD)], faxitron x-rays, microCT, and histology. Progressive loss of NIAD occurred in only the HT group (p < 0.001), and biomechanical tests correlated with the NIAD results. Significant fusion occurred only in the HT group (94% of animals with one or both levels) as assessed by palpation (p < 0.001), which predicted HT bone production assessed by faxitron (p ≤ 0.001) or microCT (p < 0.023). Intervertebral bridging bone was consistently observed only in HT-treated specimens. Induced bone was located anterior and lateral to the disc space, with no bone formation noted within the disc. Percutaneous anterior spine fusions may be possible clinically, but induction of bone inside the disc space remains a challenge.https://doi.org/10.1038/s41598-022-21208-1 |
| spellingShingle | Matthew E. Cunningham Natalie H. Kelly Bernard A. Rawlins Oheneba Boachie-Adjei Marjolein C. H. van der Meulen Chisa Hidaka Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats Scientific Reports |
| title | Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats |
| title_full | Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats |
| title_fullStr | Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats |
| title_full_unstemmed | Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats |
| title_short | Lumbar spine intervertebral disc gene delivery of BMPs induces anterior spine fusion in lewis rats |
| title_sort | lumbar spine intervertebral disc gene delivery of bmps induces anterior spine fusion in lewis rats |
| url | https://doi.org/10.1038/s41598-022-21208-1 |
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