Background: Substance P-saporin (SP-SAP), a chemical conjugate of substance P and a recombinant version of the ribosome-inactivating protein, saporin, when administered intrathecally, acts as a targeted neurotoxin producing selective destruction of superficial neurokinin-1 receptor-bearing cells in the spinal dorsal horn. The goal of this study was to provide proof-of-concept data that a single intrathecal injection of SP-SAP could safely provide effective pain relief in spontaneous bone cancer pain in companion (pet) dogs.
Methods: In a single-blind, controlled study, 70 companion dogs with bone cancer pain were randomized to standard-of-care analgesic therapy alone (control, n=35) or intrathecal SP-SAP (20-60 µg) in addition to standard-of-care analgesic therapy (n=35). Activity, pain scores, and videography data were collected at baseline, 2 weeks postrandomization, and then monthly until death.
Results: Although the efficacy results at the 2-week postrandomization point were equivocal, the outcomes evaluated beyond 2 weeks revealed a positive effect of SP-SAP on chronic pain management. Significantly, more dogs in the control group (74%) required unblinding and adjustment in analgesic protocol or euthanasia within 6 weeks of randomization than dogs that were treated with SP-SAP (24%; P<0.001); and overall, dogs in the control group required unblinding significantly sooner than dogs that had been treated with SP-SAP (P<0.01).
Conclusion: Intrathecal administration of SP-SAP in dogs with bone cancer produces a time-dependent antinociceptive effect with no evidence of development of deafferentation pain syndrome which can be seen with neurolytic therapies.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868346 | PMC |
| http://dx.doi.org/10.1097/ALN.0b013e3182a95188 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Regulation of metastatic organotropism.
Trends Cancer
December 2024
Herbert Irving Comprehensive Cancer Center, New York, NY, 10032, USA; Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY, 10032, USA; Division of Digestive and Liver Diseases, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032, USA. Electronic address:
Metastasis is responsible for most cancer-related deaths. Different cancers have their own preferential sites of metastases, a phenomenon termed metastatic organotropism. The mechanisms underlying organotropism are multifactorial and include the generation of a pre-metastatic niche (PMN), metastatic homing, colonization, dormancy, and metastatic outgrowth.
View Article and Find Full Text PDFTranscriptomic data integration and analysis revealing potential mechanisms of doxorubicin resistance in chondrosarcoma cells.
Biochem Pharmacol
December 2024
Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung 41354, Taiwan; Graduate Institute of Biomedical Science, China Medical University, Taichung 40402, Taiwan; Department of Pharmacology, School of Medicine, China Medical University, Taichung 40402, Taiwan; Chinese Medicine Research Center, China Medical University, Taichung 40402, Taiwan; Department of Medical Research, China Medical University Hsinchu Hospital, Hsinchu 30205, Taiwan. Electronic address:
Chondrosarcoma is a type of bone cancer that originates from cartilage cells. In clinical practice, surgical resection is the primary treatment for chondrosarcoma, but chemotherapy becomes essential for patients with metastasis or tumors in surgically inaccessible sites. However, drug resistance often leads to treatment failure.
View Article and Find Full Text PDFAntisense oligonucleotides-based approaches for the treatment of multiple myeloma.
Int J Biol Macromol
December 2024
Faculty of Medical Engineering, National University of Science and Technology Politehnica Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania; Advanced Polymer Materials Group, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania; ebio-Hub Research Centre, University Politehnica of Bucharest-Campus, Iuliu Maniu 6, 061344 Bucharest, Romania. Electronic address:
Multiple myeloma (MM), a hematological malignancy which affects the monoclonal plasma cells in the bone marrow, is in rising incidence around the world, accounting for approximately 2 % of newly diagnosed cancer cases in the US, Australia, and Western Europe. Despite the progress made in the last few years in the available therapeutic options (e.g.
View Article and Find Full Text PDFLate-onset disseminated BCG infection with hepatosplenomegaly after intravesical BCG immunotherapy in a non-immunocompromised patient.
Clin J Gastroenterol
December 2024
Department of Gastroenterology and Hepatology, Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, Nagoya, 453-8511, Japan.
Intravesical Bacillus Calmette-Guérin (BCG) immunotherapy for bladder cancer rarely leads to disseminated BCG infections, most of which occur early after BCG instillations or in immunocompromised patients. We report late-onset disseminated BCG infection after intravesical BCG immunotherapy in a non-immunocompromised patient. A 78-year-old non-immunocompromised man was admitted with fever and hepatosplenomegaly.
View Article and Find Full Text PDFRetraction Note: MicroRNA-143 targets MAPK3 to regulate the proliferation and bone metastasis of human breast cancer cells.
AMB Express
December 2024
Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!