Unexpected Ally In Cancer Care

Scientists working in a laboratory with microscopes and test tubes

Sugarcane, long demonized as a cavity culprit, now yields a protein that shields cancer patients’ teeth from devastating decay.

Story Snapshot

CANECPI-5 protein from sugarcane forms enamel shield against acids and bacteria in artificial saliva.
Targets head and neck cancer patients suffering radiotherapy-induced dry mouth and rampant cavities.
First product using acquired pellicle concept; outperforms alone, excels with fluoride and xylitol.
In vitro tests on irradiated enamel show reduced demineralization and bacterial activity.
Published in Journal of Dentistry; promises better quality of life for vulnerable patients.

Cancer Radiotherapy Devastates Oral Health

Radiotherapy for head and neck cancer destroys salivary glands at Bauru School of Dentistry’s research site in Brazil. Patients develop xerostomia, or dry mouth, losing saliva’s natural defense against bacteria and acids. Tooth enamel erodes rapidly from dietary acids, beverages, and stomach reflux. Cavities form aggressively without saliva’s buffering. This gap demanded innovation beyond generic artificial salivas that merely ease discomfort.

FOB-USP researchers extracted CANECPI-5 from sugarcane and modified it in labs. Professor Marília Afonso Rabelo Buzalaf coordinated the thematic project funded by FAPESP. The protein binds directly to enamel, forming an acquired pellicle—a thin protective layer mimicking natural saliva function. This shield resists acid attacks while curbing bacterial growth.

CANECPI-5 Mechanism Creates Enamel Armor

CANECPI-5 adheres to tooth surfaces, blocking acids from bacterial metabolism, sodas, and gastric sources. Dr. Silva’s team tested it on irradiated bovine enamel mimicking cancer patients’ teeth. Biofilms from actual patients simulated real oral conditions. Results showed marked reduction in demineralization, where teeth lose calcium and phosphate.

Formulations include mouthwash, gel, and orodispersible film for versatile use. Patients swish or apply as needed, addressing temporary or permanent dry mouth. Professor Buzalaf notes some require lifelong use post-radiotherapy.

Synergistic Boost from Fluoride and Xylitol

CANECPI-5 alone protects, but combinations amplify power. With fluoride and xylitol, artificial saliva slashed bacterial activity and enamel loss in tests. Fluoride remineralizes; xylitol starves bacteria. This trio targets root causes of post-radiation caries, far surpassing symptom relief. American Dental Association highlights higher caries risk in these patients, validating the approach.

In vitro data from Journal of Dentistry publication confirms efficacy. No human trials yet limit claims, but bovine enamel models predict human success. Scalability from abundant sugarcane hints at affordable access, cutting long-term dental costs for survivors.

Path to Clinical Reality and Broader Impact

Peer-reviewed status elevates credibility for regulatory paths like FDA approval. Short-term, oncologists and dentists gain a tool raising patient awareness. Long-term, commercialization could expand to Sjögren’s syndrome or medication-induced dry mouth. Researchers eye fusions with statherin for gastric acid defense and periodontal applications.

Brazilian innovation spotlights global biotech potential from plant sources. Economic wins include fewer restorations; social gains mean less pain for cancer fighters.