Research Tools and Topics
A list of resources to help make tools and information more broadly accessible and help save time and effort for scientists devoted to helping our patient community.
Research Compass
Disease Models
iPSC:
- multiple lines of patient derived available at both the COMBINEDBrain and Coriell biorepositories (see Biorepository information below)
- isogenic cell lines (SLC2A1+/-) available from Abraham Al-Ahmad, PhD @ Texas Tech (donated and available through Coriell)
mouse:
- Mutant Mouse Resource and Research Center (MMRRC)
Charles Heilig model RIKEN/Tamio Furuse model - Jackson Labs
- Juan Pascual, MD, PhD @ Weill Cornell
- Umrao Monani, PhD @ Columbia University
fly:
- Fly Base database of available fly models
Research Tools
Information shared from Abraham Al-Ahmad, PhD and Quin Ma, PhD
Assays:
- 14C-glucose (radioactive) preferred
- colorimetric/fluorimetric based assays seem to have limitations in terms of accuracy, sensitivity and/or reproducibility
Antibodies:
- SPM498 clone (Thermofisher) works well on IF and flow, but not Western Blot
- SA0377 (MA5-31960, Thermofisher) works well for Western Blot and flow, but on IF it was not as good as SPM498
- polyclonal rabbit recognizing the N-terminus - still a work in progress for optimization
- MilliporeSigma (catalog number: 07-1401) works well using a general Western Blot protocol and a concentration of 1:1000
GEO (Gene Expression Omnibus) Data Sets for GLUT1 Deficiency:
- RNAseq Data
Project Title: Impacts of Glut1 Deficiency and High Glucose Exposure on Transcriptomic Profiling in Human Brain Microvascular Endothelial Cells - Astrocytic Translatome Data
Project Title: Effect of astrocytic absence of glucose transporter 1 (GLUT1) on the cortical astrocytic translatome
Biorepositories
If you are ordering biosamples from either the Cornell or COMBINEDBrain biorepositories, please reach out to G1DF Science Director Dr. Sandra Ojeda ([email protected]) to inquire about natural history or phenotypic information that may be available for any specific samples.
COMBINEDBrain
The GLUT1 Deficiency Foundation has a quickly growing biorepository as part of a collaborative effort through our membership in the COMBINEDBrain consortium. There are samples from over 40 GLUT1 Deficiency patients plus healthy controls as well as from patients across more than 30 neurodevelopment disorders in COMBINEDBrain. De-identified samples will be linked to any available natural history study data through a unique clinical research identifier.
current sample types available:
- plasma
- PBMC's
- patient-derived iPSC's (several lines representing diverse variants and phenotypes - list at the link)
- urine
- blood spots
If you are a researcher interested in obtaining samples or a patient/family interested in donating samples, please contact G1DF Science Director Dr. Sandra Ojeda [email protected] for further information.
Coriell Institute for Medical Research
The GLUT1 Deficiency Foundation is helping facilitate the establishment of a biobank repository at Coriell Institute for Medical Research. Cell lines and other biological samples are available to researchers around the world who are working to advance the diagnosis and treatment of GLUT1 Deficiency. Patient samples along with unaffected family members are available.
current sample types available:
- LCL (lymphoblastoid cell lines)
- fibroblasts
- isogenic cell lines (SLC2A1+/-) available from Abraham Al-Ahmad, PhD @ Texas Tech
(donated and available through Coriell) - patient-derived iPSC with isogenic control line
(reach out to the GLUT1 Deficiency Foundation for additional phenotypic data for this line through our Natural History Study)
If you are a patient and would like to find out more about contributing samples to this important initiative or are a researcher looking for a source, please contact Jose Santana at Coriell. The catalog of resources can be found at the link below.
Tissue Banks
Brain Bank: Brain and tissue donation is a powerful research tool and an incredibly personal and meaningful gift. The G1DF has created a partnership with the University of Maryland Brain and Tissue Bank to make this opportunity available to the GLUT1 Deficiency community - learn more.
Summary Notes from the Hemlock family's 2022 conference presentation on their tissue donation experience.
Eye Bank: Dr. Ivy Samuels, a researcher who studies GLUT1 in the retina, is helping coordinate a study to look more closely at any retina impacts for GLUT1 Deficiency patients. In collaboration with Eversight, an eye bank is being set up to learn more.
Please check back for more details as this program is established.
Natural History Study
The G1DF has two natural history study opportunities to collect data about patient experiences so we can better understand the full picture of Glut1 Deficiency and how that changes over time.
Patient reported data will be collected on the Matrix platform with the plan to add clinical data in the future. De-identified data may also be linked to any biorepository samples available.
Clinical reported outcomes are being collected on the Citizen platform through the collection and analysis of patient health records that include information about diagnoses, symptoms, treatments, and tests.
Please visit the link below to learn more about these studies or contact G1DF Science Director Sandra Ojeda with questions.
Clinical Trial Information
Please visit our Clinical Trials informational page for more details on current or upcoming trial opportunities.
ClinicalTrials.gov
Find a listing of recent, current, and future clinical trial studies for Glucose Transporter Type1 Deficiency Syndrome.
The GLUT1 Deficiency Foundation urges prospective clinical trial participants to carefully examine each project, its purpose, its informed consent paperwork, and the protocol for the study in order to make the most informed decisions. Changes in care and decisions about clinical trial participation should be made under the guidance of trusted healthcare professionals knowledgeable about GLUT1 Deficiency and familiar with individual patient needs. Learn more about clinical studies from the National Institutes of Health here and from our Research Ready Series resources.
Diagnostic Tools
Metafora Biosystems is a company based in France that is developing a blood test, METAGlut1, to diagnose GLUT1 Deficiency through detecting cell energy abnormalities. The test is currently available in France, Belgium, and Luxembourg with more research and development underway to make it more widely available.
Lumbar puncture and genetic testing remain the standard tools for diagnosis. Please find more information at the link below.
Collaborations
The GLUT1 Deficiency Foundation is pleased to be members of several collaborative organizations who are working to share resources, information, and strategies to help better support patients and families and drive research progress.
Chan Zuckerberg Initiative Rare As One Network
COMBINEDBrain
Rare Epilepsy Network (REN)
RESOLUTE is a public-private partnership with 13 partners from academia and industry with an overarching goal: To trigger an escalation in the appreciation and intensity of research on solute carriers (SLCs) worldwide and to establish SLCs as a tractable target class for medical research and development.
Life Sciences Protocols
Bio-Protocol believes that traditional methods sections of a research article are often brief and incomplete, making it difficult to replicate experiments without extensive trouble-shooting.
Launched in 2011 by a group of Stanford postdoctoral researchers, Bio-protocol aims to solve this issue with the Bio-protocol journal, an online peer-reviewed protocol journal curating and hosting high quality, free access protocols across the life sciences. Sharing detailed methods and fostering direct communication among researchers will improve reproducibility and accelerate discovery.