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How does Chlorotoxin affect the nervous system?

Author

Sarah Thomas

Updated on August 05, 2026

How does Chlorotoxin affect the nervous system?

A substance being studied in the diagnosis and treatment of glioma (a type of brain cancer) and other types of cancer. It binds to cancer cells in the brain and peripheral nervous system and may keep them from spreading.

What is Chlorotoxin used for?

Its ability to preferentially bind to tumor cells has been harnessed to develop an imaging agent to help visualize tumors during surgical resection. In addition, chlorotoxin has attracted interest as a vehicle to deliver anti-cancer drugs specifically to cancer cells.

Is Chlorotoxin a neurotoxin?

CTX is a small neurotoxin of 36 amino acids, isolated in 1993 from the venom of the Israeli scorpion Leiurus quinquestriatus [12]. It holds great promise for the treatment of glioma and other solid tumors.

What is peptide chlorotoxin?

Chlorotoxin is a 36-amino acid peptide found in the venom of the deathstalker scorpion (Leiurus quinquestriatus) which blocks small-conductance chloride channels.

What is Chlorotoxin attracted to?

Chlorotoxin, a 36-amino acid peptide isolated from the venom of the giant Israeli scorpion (Leiurus quinquestriatus), has attracted increasing attention due to its high selectivity for glioma and other tumors of neuroectodermal origin by binding to matrix metalloproteinase-2. Wang et al.

How was Chlorotoxin discovered?

Strichartz at Harvard Medical School discovered that its mode of toxicity is to block small-conductance chloride channels, which results in paralysis. Chlorotoxin preferentially binds to glioma cells, which prompted researchers to investigate it as a tool for diagnosing and treating some cancers.

How does tumor paint work?

Jim Olson, a pediatric brain-cancer expert at the Fred Hutchinson Cancer Research Center in Seattle, Washington. This tumor paint is an experimental substance derived from scorpion venom. This paint is injected into a patient’s vein, and it crosses the blood-brain barrier, finding its way to a brain tumor.

Who discovered Chlorotoxin?

What was the tumor paint created from?

Tumor Paint was created using a peptide, or a small protein, from the Israeli deathstalker scorpion. But the formula is entirely synthetic. It is currently being evaluated in a phase 2/3 clinical trial with pediatric patients.

What is Tozuleristide?

Tozuleristide is a drug that is thought to attach to tumor tissue and then fluoresces (glows) when a special light from the Canvas is shined on it.

What is tumor paint?

Also known as BLZ-100, tozuleristide is what the company refers to as “Tumor Paint,” a molecule that binds to cancer cells and lights them up to help brain surgeons remove tumors. Tumor Paint was created using a peptide, or a small protein, from the Israeli deathstalker scorpion. But the formula is entirely synthetic.

What type of organism did tumor paint come from?

Derived from the DNA of the Israeli death stalker scorpion, Tumor Paint chemically adheres to cancer cells and causes them to glow. It is thousands of times more sensitive than MRI imagery, enabling surgeons to distinguish easily between deadly cancer cells and surrounding healthy tissue.