AsiDNA Children, Adolescents and Young Adults

Study Purpose

HGG comprises diffuse midline gliomas (DMG), including diffuse infiltrating brainstem glioma (DIPG), characterised by histone gene mutations, as well as non-DM HGGs mainly in non-midline supratentorial areas, with distinct molecular abnormalities. First-line treatment comprises surgery when doable (non-DM HGGs), and radiotherapy in all cases. Chemotherapy or other drugs in clinical trials may be added during and/or after radiotherapy depending on the HGG subtype. The recurrence rate is nevertheless high in all paediatric and adolescent HGGs. If the time interval between the end of first-line radiotherapy and relapse is long enough, re-irradiation often provides good palliation of symptoms, delays disease progression, improves quality of life and has minimal and manageable toxicity. Nevertheless, strategies to increase efficacy without increasing toxicity in the treatment of recurrent paediatric HGG are much needed. AsiDNA™ is a DNA repair inhibitor that increases the vulnerability of tumour cells to irradiation without increasing toxicity in healthy tissues. Its novel mechanism of action, based on perturbation of the DNA damage recognition steps in DNA repair, makes its activity specific to tumour cells. Intravenous administration of AsiDNA is currently being investigated in adults with advanced solid tumours. The MTD was not reached during the escalating dose study on the safety, pharmacokinetics and pharmacodynamics of AsiDNA administered as a 1-hour infusion, however an optimal dose range (400-600 mg) was identified for further development, based on the favourable safety and PK profiles. Preclinical studies on AsiDNA added to radiotherapy have shown increased survival and no increase in short- or long-term toxicity due to the high doses of irradiation. The study will provide paediatric patients who have recurrent HGG with early access to innovation, even during the early drug development stage in adults.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Interventional
Eligible Ages	12 Months - 24 Years
Gender	All

More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Written informed consent from patient (depending on age) and/or parents or legal guardian; 2. Patient must be ≥ 12 months and < 25 years of age at the time of enrolment on the study; 3. Recurrent high-grade glioma (HGG), including diffuse midline glioma (DMG) and non-DMG, based on RAPNO criteria confirmed by central radiological review, with or without histology if biopsy performed prior to inclusion; 4. Available tumour material, at least paraffin embedded and/or also frozen material; 5. For DMG and non-DMG HGG, prior radiation dose prescribed ≤ 60 Gy, completed at least 6 months prior to inclusion, with stable disease; 6. Maximum cumulative radiation dose to optic chiasm and optic nerve < 56 Gy and < 54 Gy to upper cervical spine (at level C1); 7. Life expectancy > 2 months at Screening; 8. Patient must have a Lansky (≤ 16 years) or Karnofsky (> 16 years) score of ≥ 50 % , not taking into account neurological deficit; 9. No significant abnormality on laboratory tests at Screening, including: 1. Haemoglobin > 9 g/dL; 2. Neutrophils > 1.0 x 109/L; 3. Platelets > 100 x 109/L; 4. Total bilirubin < 1.5 x ULN; 5. AST and ALT< 2.5 x ULN; 6. Serum creatinine < 1.5 x ULN for age; 7. Normal coagulation tests. 10. No organ toxicity > grade 2 according to NCI CTCAE version 5.0 classification, notably cardiovascular, pulmonary or renal diseases, including congenital QT prolongation syndrome, nephrotic syndrome, glomerulopathy, uncontrolled high blood pressure despite appropriate treatment, interstitial pulmonary disease, pulmonary hypertension; 11. Negative serum pregnancy test for women of child-bearing potential, and highly effective birth control method for male and female patients of reproductive potential; 12. Patients covered by social security or health insurance in compliance with the national legislation relating to biomedical research.

Exclusion Criteria:

5. Prior radiation dose prescribed > 60 Gy; 6. Massive intra-tumour haemorrhage; 7. Pseudoprogression (including after central review); 8. Metastatic relapse; 9. Other anticancer treatment, on-going or within less than 4 weeks prior to inclusion; 10. Prior or concurrent malignant disease, other than HGG, diagnosed or treated within 5 years prior to inclusion; patients with CMMRD are eligible; 11. Uncontrolled intercurrent disease or active infection; 12. Concomitant disease or other significant medical, psychiatric, or surgical condition, currently uncontrolled by treatment, which may interfere with completion of the study; 13. Patients unable to comply with the protocol for any reason; 14. Organ toxicity > grade 2 according to NCI CTCAE version 5.0 classification, notably cardiovascular, pulmonary or renal diseases, including congenital QT prolongation syndrome, nephrotic syndrome, glomerulopathy, uncontrolled high blood pressure despite appropriate treatment, interstitial pulmonary disease, pulmonary hypertension 15. Breastfeeding or pregnancy

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT05394558
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.	Phase 1/Phase 2
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	Institut Curie
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	N/A
Principal Investigator Affiliation	N/A
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Other
Overall Status	Recruiting
Countries	France
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Recurrent High-grade Glioma

Arms & Interventions

Arms

Experimental: Radiotherapy + AsiDNA

Patients will receive the IMP which is the AsiDNA (etidaligide). AsiDNA will be administered intravenously as a 1-hour infusion. All patients will receive a loading dose for three consecutive days, with Day 1 being the start day of radiotherapy, followed by once weekly administrations during 11 weeks. The infusion of AsiDNA should be administered between 4 and 6 hours before the planned start of radiotherapy. After the administration of AsiDNA, Patients with DIBG will receive a total dose of 18 Gy, delivered in 10 fractions of 1.8 Gy, i.e. 5 fractions per week for 2 weeks, starting on Day 1. Patients with supratentorial non-DMG or DMG will receive a total dose of 36 Gy, delivered in 20 fractions of 1.8 Gy, i.e. 5 fractions per week for 4 weeks, starting on Day 1.

Active Comparator: Radiotherapy

Patients with DIBG will receive a total dose of 18 Gy, delivered in 10 fractions of 1.8 Gy, i.e. 5 fractions per week for 2 weeks, starting on Day 1. Patients with supratentorial non-DMG or DMG will receive a total dose of 36 Gy, delivered in 20 fractions of 1.8 Gy, i.e. 5 fractions per week for 4 weeks, starting on Day 1.

Interventions

Drug: - AsiDNA

Administration of AsiDNA followed by radiotherapy

Contact a Trial Team

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