VYNE Stock Price Increases Over 10% Pre-Market: Why It Happened

By Amit Chowdhry ● Feb 2, 2021
  • The stock price of Vyne Therapeutics Inc (NASDAQ: VYNE) is trading at over 10% pre-market. This is why it happened.

The stock price of Vyne Therapeutics Inc (NASDAQ: VYNE) — a specialty pharmaceutical company focused on developing and commercializing proprietary therapies to address unmet needs in dermatology — is trading at over 10% pre-market. Investors appear to be responding to an approval by the U.S. Food and Drug Administration (“FDA”) to include new information in the product label for AMZEEQ (minocycline) topical foam, 4% referencing the low propensity of P. acnes strains to develop resistance to minocycline (the active ingredient in AMZEEQ). AMZEEQ is indicated for the treatment of inflammatory lesions of non-nodular moderate to severe acne vulgaris in adults and pediatric patients 9 years of age and older.

Specifically, the FDA-approved AMZEEQ label is now providing that with respect to resistance, P. acnes strains displayed a low propensity for the development of resistance to minocycline with spontaneous mutation frequencies occurring <10−8 (or 1 in 100 million) at 2 to 16 times the minimum inhibitory concentration (MIC). And the update to the microbiology section in the label further states that although the clinical significance is unknown, the active ingredient in AMZEEQ (minocycline), is proven to be active in vitro against most isolates of P. acnes.

The FDA approval was supported by an extensive antimicrobial characterization program by VYNE for both AMZEEQ and minocycline that was published last year in the peer-reviewed journal Anaerobe. And the program evaluated the on-target potency of AMZEEQ and minocycline against P. acnes and further evaluated the potential for the development of minocycline-resistant strains that could reduce the potency of AMZEEQ in the treatment of acne.

P. acnes (recently renamed Cutibacterium acnes) is an anaerobic bacterium that resides within the pilosebaceous unit in the skin and is the primary microbial initiator and propagator in the development of acne. And the use of antibiotics to counteract the effect of this bacterium remains a major cornerstone of acne disease management. But concerns over the development of antibiotic-resistant strains are factors for a prescriber’s choice of antibiotic and route of administration. Resistant strains of P. acnes are common although primarily linked to the macrolide and lincosamide class of antibiotic use (erythromycin and clindamycin respectively).


“The risk of antimicrobial resistance is a primary concern for dermatologists or, indeed, any routine prescriber of antibiotics. We are pleased that the inclusion of this valuable additional information for AMZEEQ will support prescribers in making informed decisions on both their choice of antibiotic and administration route when selecting a treatment for acne.”

— David Domzalski, CEO of VYNE

“Both dermatologists and payors have had keen interest in antimicrobial resistance data as they balance patient care with antibiotic stewardship. We believe the label update will be well-received.”

— Matt Wiley, Chief Commercial Officer for VYNE