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Home NEWS Science News Cancer

St. Jude creates resource for pediatric brain tumor research

Bioengineer by Bioengineer
June 23, 2020
in Cancer
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Researchers worldwide can access orthotopic patient-derived xenograft models to speed discovery and test novel therapies for childhood brain tumors

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Credit: St. Jude Children’s Research Hospital

Scientists at St. Jude Children’s Research Hospital have created orthotopic patient-derived xenograft (O-PDX) models representing a variety of pediatric brain tumor types. The models are molecularly characterized and available through a cloud-based data portal. Acta Neuropathologica recently published a report detailing these models.

Brain tumors are the most common solid tumors affecting children. O-PDXs are research models that are created with the consent of patients and parents by implanting cancerous cells orthotopically, or in the same tissue, in immune-compromised mice. These models have recently emerged as a useful way to test new therapies because they remain faithful to the biology of the original tumors from which they derive.

“We started out by researching medulloblastoma and needing a good model that we could use to screen for novel therapies,” said corresponding and co-senior author Martine Roussel, Ph.D., St. Jude Tumor Cell Biology. “Our current database of models is the result of many years of work by our lab as well as with many collaborators in surgery, oncology, pathology and computational biology.”

St. Jude researchers have created 37 O-PDX models generated from samples of pediatric medulloblastoma, ependymoma, atypical teratoid rhabdoid tumor and embryonal tumors donated by patient families. Scientists have thoroughly characterized these models using a combination of histopathology, whole-genome and whole-exome sequencing, RNA-sequencing and DNA methylation analysis. The O-PDXs provide a novel modeling strategy based upon individual genomes.

“To effectively treat childhood brain tumors, we need to have additional treatment strategies in our toolkit,” said author Frederick Boop, M.D., St. Jude Pediatric Neurosurgery Division chief. “It takes many different scientific and medical specialties working together to create these types of models and conduct essential preclinical research that paves the way for new clinical trials.”

At St. Jude, work done in some of these models provided support to launch three clinical trials for pediatric brain tumors (SJMB12, SJDAWN and SJELIOT).

The O-PDX models and their associated data are available through an interactive web-based portal as part of St. Jude Cloud. St. Jude Cloud provides data and analysis resources for pediatric cancer and other pediatric catastrophic diseases through a cloud-based infrastructure.

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The co-first authors are Kyle Smith and Ke Xu, and co-senior authors are Paul Northcott and Giles Robinson, all of St. Jude. Additional authors include Kimberly Mercer, Paul Klimo, Michael DeCuyere, Jose Grenet, Sarah Robinson, Paige Dunphy, Suzanne Baker, David Ellison, Thomas Merchant, Santosh Upadayaya, Amar Gajjar, Gang Wu and Brent Orr, all of St. Jude.

The research was funded in part by the National Cancer Institute (P01-CA-096832, R01CA232143-01, CA021765); the Brain Tumor Charity (Quest for Cures and Clinical Biomarkers), and ALSAC, the fundraising and awareness organization of St. Jude.

St. Jude Children’s Research Hospital

St. Jude Children’s Research Hospital is leading the way the world understands, treats and cures childhood cancer and other life-threatening diseases. It is the only National Cancer Institute-designated Comprehensive Cancer Center devoted solely to children. Treatments developed at St. Jude have helped push the overall childhood cancer survival rate from 20% to 80% since the hospital opened more than 50 years ago. St. Jude freely shares the breakthroughs it makes, and every child saved at St. Jude means doctors and scientists worldwide can use that knowledge to save thousands more children. Families never receive a bill from St. Jude for treatment, travel, housing and food — because all a family should worry about is helping their child live. To learn more, visit stjude.org or follow St. Jude on social media at @stjuderesearch.

Media Contact
Katy Hobgood
[email protected]

Related Journal Article

http://dx.doi.org/10.1007/s00401-020-02171-5

Tags: cancerMedicine/Health
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