
Ethanol-ethyl cellulose ablation therapy (ECE)
The WHO recommends the use of ablative therapies, including cryotherapy and thermocoagulation, to treat cervical dysplasia in resource-limited settings because they cost less than LEEP excision of the cervix, do not require removing tissue, therefore leaving the cervix intact, and can be performed by non-specialists. While both technologies effectively treat the superficial layers of cervical tissue, neither therapy effectively treats microinvasive disease or early carcinomas (stage IA and IB), which can extend beyond 5 mm in depth. Thus, there is a need for an accessible, robust therapeutic to treat deeper lesions.
To develop a complementary therapeutic that can address these limitations, we have developed a simple formulation combining ethanol and an inert polymer, ethyl cellulose to induce necrosis through protein denaturation and cytoplasmic dehydration. Ethyl cellulose is a freely flowing fluid in its soluble form; however, it undergoes a phase change into a biodegradable polymer gel in aqueous media encapsulating the solvent within a hydrophobic shell localizing the volume of destruction to the region where the injection is made. It has the added benefit of enhanced control in selecting needle depth and location(s) within the cervix. This therapeutic has an excellent strong safety profile with no deviations from normal vital signs, limited side effects, and no adverse events within 24 h of ablation.
ECE is an injectable gel therapeutic that allows for ablation of a local region of tissue where pre-cancer or early cancer is found. It can localize the zone of destruction (A) by controlling the needle depth and location(s) within the cervix resulting in a well-defined zone of necrosis (B). The formulation can be modified for different volumes of ablation.

Related Publications

Optimizing ethyl cellulose-ethanol delivery towards enabling ablation of cervical dysplasia

Development of enhanced ethanol ablation as an alternative to surgery in treatment of superficial solid tumors
