Oncolytic Adenovirus, DNX-2401, for Naive Diffuse Intrinsic Pontine Gliomas

Oncolytic adenovirus for pediatric naive DIPG, to be infused after tumor biopsy through the same trajectory in the cerebellar peduncle.

Sex

All

Minimum age

1 Year

Maximum age

18 Years

Inclusion Criteria:

1. Informed consent OF PATIENT OR PARENTS
2. Patient must be, in the investigator opinion, able to comply with all the protocol procedures.
3. Age 1 - 18 years
4. Negative pregnant blood test in case of fertile women (A woman is considered of childbearing potential (WOCBP), i.e. fertile, following menarche and unless permanently sterile. Permanent sterilization methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy.
5. Patient newly diagnosed of DIPG in MRI
6. Lansky Performance Status ≥ 70 before inclusion
7. Lesion considered by the investigator to be accessible for stereotactic biopsy. Lesion location will allow injection without entrance of virus in the ventricular system.
8. No previous treatment for DIPG

Exclusion Criteria:

1. Severe infections or intercurrent medical conditions including, but not limited to, severe renal, hepatic, heart or bone marrow failure, that, on investigator´s criteria, do not allow the inclusion. Patients must be afebrile at baseline \[i.e., \< 38 degrees (Cº)\].
2. Investigational medication in the previous 30 days.
3. Subjects with immunodeficiency, autoimmune conditions or active hepatitis.
4. Any medical or psychological condition that might interfere with the subject's ability to participate if older than 16 years or parents ability when younger than 16, or give informed consent or would compromise the patient's ability to tolerate therapy or any disease that will obscure toxicity or dangerously alter drug metabolism.
5. Tumor with multiple locations or doubt in MRI of a DIPG.
6. Pregnant or breast-feeding females will be excluded, due to the risk for the fetal development of a recombinant virus containing genes related to cellular growth and differentiation.
7. Severe bone marrow hypoplasia.
8. AST (aspartate transaminase) and/or ALT (alanine transaminase)\> 3 times over upper normal laboratory level
9. Neutrophils \< 1 x 109/L
10. Thrombocytes ≤ 100 x 109/L
11. Hemoglobin \< 9g/dl

13\. Patients with Li-Fraumeni Syndrome or with a known germ line deficit in the retinoblastoma gene or its related pathways.

14\. Vaccinations of any kind within 30 days prior to DNX-2401 administration. 15. Transfusions or medications (G-CSF) to treat pancytopenia or other hematological conditions within 28 days of baseline.

• RESULTAlonso MM, Gomez-Manzano C, Bekele BN, Yung WK, Fueyo J. Adenovirus-based strategies overcome temozolomide resistance by silencing the O6-methylguanine-DNA methyltransferase promoter. Cancer Res. 2007 Dec 15;67(24):11499-504. doi: 10.1158/0008-5472.CAN-07-5312. PMID 18089777
• RESULTJansen MH, Veldhuijzen van Zanten SE, Sanchez Aliaga E, Heymans MW, Warmuth-Metz M, Hargrave D, van der Hoeven EJ, Gidding CE, de Bont ES, Eshghi OS, Reddingius R, Peeters CM, Schouten-van Meeteren AY, Gooskens RH, Granzen B, Paardekooper GM, Janssens GO, Noske DP, Barkhof F, Kramm CM, Vandertop WP, Kaspers GJ, van Vuurden DG. Survival prediction model of children with diffuse intrinsic pontine glioma based on clinical and radiological criteria. Neuro Oncol. 2015 Jan;17(1):160-6. doi: 10.1093/neuonc/nou104. Epub 2014 Jun 5. PMID 24903904
• RESULTJiang H, Gomez-Manzano C, Aoki H, Alonso MM, Kondo S, McCormick F, Xu J, Kondo Y, Bekele BN, Colman H, Lang FF, Fueyo J. Examination of the therapeutic potential of Delta-24-RGD in brain tumor stem cells: role of autophagic cell death. J Natl Cancer Inst. 2007 Sep 19;99(18):1410-4. doi: 10.1093/jnci/djm102. Epub 2007 Sep 11. PMID 17848677
• DERIVEDGallego Perez-Larraya J, Garcia-Moure M, Labiano S, Patino-Garcia A, Dobbs J, Gonzalez-Huarriz M, Zalacain M, Marrodan L, Martinez-Velez N, Puigdelloses M, Laspidea V, Astigarraga I, Lopez-Ibor B, Cruz O, Oscoz Lizarbe M, Hervas-Stubbs S, Alkorta-Aranburu G, Tamayo I, Tavira B, Hernandez-Alcoceba R, Jones C, Dharmadhikari G, Ruiz-Moreno C, Stunnenberg H, Hulleman E, van der Lugt J, Idoate MA, Diez-Valle R, Esparragosa Vazquez I, Villalba M, de Andrea C, Nunez-Cordoba JM, Ewald B, Robbins J, Fueyo J, Gomez-Manzano C, Lang FF, Tejada S, Alonso MM. Oncolytic DNX-2401 Virus for Pediatric Diffuse Intrinsic Pontine Glioma. N Engl J Med. 2022 Jun 30;386(26):2471-2481. doi: 10.1056/NEJMoa2202028. PMID 35767439
• DERIVEDMartinez-Velez N, Garcia-Moure M, Marigil M, Gonzalez-Huarriz M, Puigdelloses M, Gallego Perez-Larraya J, Zalacain M, Marrodan L, Varela-Guruceaga M, Laspidea V, Aristu JJ, Ramos LI, Tejada-Solis S, Diez-Valle R, Jones C, Mackay A, Martinez-Climent JA, Garcia-Barchino MJ, Raabe E, Monje M, Becher OJ, Junier MP, El-Habr EA, Chneiweiss H, Aldave G, Jiang H, Fueyo J, Patino-Garcia A, Gomez-Manzano C, Alonso MM. The oncolytic virus Delta-24-RGD elicits an antitumor effect in pediatric glioma and DIPG mouse models. Nat Commun. 2019 May 28;10(1):2235. doi: 10.1038/s41467-019-10043-0.