Potentiation of Chemotherapy in Brain Tumors by Zinc

NCT ID: NCT04488783

Last Updated: 2020-07-28

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-07-30
• Study Completion Date: 2022-12-30

Brief Summary

Glioblastoma (GB) is the most common and aggressive type of primary malignant brain tumor in adults. Despite advances in surgical resection, radiotherapy and chemotherapy, prognosis remains very poor. Temozolomide (TMZ) as an alkylating agent has become part of GBM management but it has contributed only marginally to prolongation of life in GBM patients. Our aim is to evaluate the therapeutic potential of the trace element zinc to facilitate temozolomide tumor cell toxicity in GBM. P53 gene is inactive/mutant in most of these patients which may affect the resistance to apoptosis of tumor cells by chemotherapy. Zinc (Zn) has a crucial role in the biology of p53, in that p53 binds to DNA through a structurally complex domain stabilized by zinc atom. We have shown that the cytotoxic activity of TMZ is substantially increased with the addition of zinc in vitro with GBM cell lines as well as in vivo, with intracranial GBM xenografts. Numerous studies of zinc in animal models and in human subjects support its use in the treatment and possibly the prevention of cancer. Zinc has been consumed by the public as an essential mineral (and thus is category A drug) in concentrations which allows this effect with Temozolomide. Vitamin C could add to this by priming the immune system for lymphocyte- linked cancer killing. The vitamin c increases the number of tumor infiltrating lymphocytes and enhances the activation of the immune system.We propose a single arm phase II clinical trial in 30 newly diagnosed GBM patients who will be treated with the standard chemo-radiotherapy with the addition of zinc and vitamin C.

Detailed Description

We propose a single arm phase II clinical trial in 30 newly diagnosed GBM patients who will be treated with the standard chemo-radiotherapy with the addition of daily zinc. We will follow the toxicity, Progression free survival and overall survival of this group of patients. We hope to demonstrate the anti-tumor activity of zinc that will enhance the activity of temozolomide chemotherapy in adult glioblastoma patients. We will also follow the safety and monitor quality of life during treatment. In this study, we will compare results of patients receiving zinc to historical patient data. We will review patient portfolios with GB tumors that received treatment as the subjects in this study in the last five years before the study began. Collecting the data and separating the identified data from the file in a way that cannot be retrieved in any way will be done by a staff member from Dr Ruty Shai's laboratory who is authorized to open medical files. We will adjust the age and number of patients in each gender. Data collected: date of birth, age of disease development, gender, data after receiving treatment: Progression free survival and overall survival of this group of patients, side effects, and quality of life.

Conditions

Newly Diagnosed Glioblastoma Who Underwent at Least Partial Resection of the Tumor Surgically

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Glioblastoma patients

newly diagnosed GB who underwent at least partial resection of the tumor surgically

Group Type: EXPERIMENTAL

zinc and ascorbate

Intervention Type: DIETARY_SUPPLEMENT

oral zinc and ascorbate

Interventions

zinc and ascorbate

oral zinc and ascorbate

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

Inclusion Criteria

• Males and Females,
• age ≥ 18 years old,
• newly diagnosed GBM, Karnofsky performance status of ≥ 70,
• after partial resection or gross tumor resection (GTR) who recovered from surgical resection.

Exclusion Criteria

• GB patients with less than 20% of tumor removed,
• Prior treatment for GB (other than surgical resection),
• any known malignancy outside of the brain in the last 5 years,
• in ability to swallow drugs.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 90 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Sheba Medical Center

OTHER_GOV

Sponsor Role: lead

Responsible Party

Dr. Leor Zach, MD

MD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Sheba Medical Center

Ramat Gan, , Israel

Site Status: RECRUITING

Countries

Israel

Central Contacts

Ruty Shai, PhD

Role: CONTACT

ruty.shai@sheba.health.gov.il

972-543938318

Facility Contacts

Ruty Shai, Ph.D

Role: primary

ruty.shai@sheba.health.gov.il

972543938318

Other Identifiers

4266-17-SMC

Identifier Type: -

Identifier Source: org_study_id