Glioblastoma Multiforme, Hyperglycemia
Conditions
Keywords
glucose monitoring
Brief summary
This pilot study aims to evaluate the feasibility of close glucose monitoring and management of patients (targeting fasting and pre-meal glucose of 4-7 mmol/L) using state-of-the-art flash glucose monitoring (FGM) technology. The glycemic intervention will be personalized based on individual blood glucose levels. Although the glycemic interventions used in this study include standard medications and methods of glucose monitoring used for patients with diabetes, this pilot study will specifically evaluate the feasibility of using these approaches in patients with GBM, appreciating their additional medical, functional and social challenges.
Detailed description
The purpose of this pilot study is to determine the feasibility of using close monitoring and management of glucose levels in patients undergoing radiation and chemotherapy for glioblastoma. The glucose management will include the use of standard metformin a common treatment for patients with early type 2 diabetes that has also shown anti-tumor effects in GBM, and will be further personalized based on individual blood glucose levels. Additional anti-hyperglycemic management will be provided at the discretion of the Endocrinologist. Close glucose monitoring will include flash glucose monitoring (FGM) with a device called an FreeStyle Libre Pro Flash Glucose Monitoring System, finger-prick glucose measures (standard approach for patients with diabetes) and weekly blood tests (our current standard for patients with GBM). In addition to determining the feasibility of using these approaches, this pilot study will help identify the simplest and most effective approach of managing glucose levels in patients with GBM appreciating their additional medical, functional and social challenges.
Interventions
None listed
Sponsors
Sinai Health System
University Health Network, Toronto
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Adult patients (\> 18 years old) with a new histologically-confirmed diagnosis of glioblastoma who are planned to receive a 6-week course of concurrent radiation and temozolomide * Has evidence of random glucose of at least 7.8 mmol/L or fasting blood glucose of at least 6.1 mmol/L (meeting criteria for oral diabetic medications) * Able to provide informed consent * Able to understand and follow instructions regarding self-administered capillary glucose measurements
Exclusion criteria
* Contraindication to MRI with gadolinium * Taking anti-hyperglycemic medications at the time of study eligibility screen * Unable to participate in neurocognitive evaluation in English
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Total time spent in target glucose level | 1 week | total time spent in target range of 4-10 mmol/L based on FGM data during week 6 of radiotherapy and temozolomide therapy |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Area under the curve for glycemic exposure and variability | baseline, week 1, 2, 3, 4, 5, 6, 10-13, 3 months | Glucose levels measured using FGM vs conventional clinical measures (e.g. capillary blood glucose) |
| Neurocognitive Function | Baseline | To explore the association between glycemia and neurocognitive functions patients will undergo standardized tests |
| prevalence of sensor site problems | From baseline to week 6 - the time from sensor insertion through completion of study intervention | infection, irritation, and secondary complication in the study cohort |
Countries
Canada
Outcome results
None listed