PTGX Stock: Why It Significantly Decreased Today

By Amit Chowdhry ● Sep 17, 2021
  • The stock price of Protagonist Therapeutics Inc (NASDAQ: PTGX) fell over 60% during intraday trading today. This is why it happened.

The stock price of Protagonist Therapeutics Inc (NASDAQ: PTGX) fell over 60% during intraday trading today. Investors are responding negatively to Protagonist Therapeutics announcing the receipt of verbal communication from the U.S. Food and Drug Administration (FDA) that Protagonist’s clinical studies for rusfertide, an investigational product candidate currently in development, have been placed on a clinical hold.

The clinical hold follows Protagonist’s notification to the FDA of a recent non-clinical finding in a 26-week rasH2 transgenic mouse model study. And the rasH2 model is designed to detect signals related to tumorigenicity, and benign and malignant subcutaneous skin tumors were observed in this study.

Protagonist Therapeutics is working with the FDA and will be prepared to make all appropriate updates to clinical study documents and determine the next steps in consultation with the FDA. And the company will provide additional clinical safety reports, update the investigator brochures and patient informed consent forms, and make necessary modifications to study protocols. The dosing of patients in all ongoing clinical trials with rusfertide will be put on hold, and study investigators have been contacted to facilitate patient notification.

KEY QUOTE:

“Patient safety is our absolute top priority. We are fully committed to working closely with the FDA in understanding and evaluating potential clinical risks and determining next steps for the development of rusfertide.”

— Dinesh Patel, President and Chief Executive Officer of Protagonist

Disclaimer: This content is intended for informational purposes. Before making any investment, you should do your own analysis.