Spero Therapeutics Announces Positive Recommendation to Continue Phase 3 Clinical Trial of SPR994 as Planned Following Independent Review Committee Analysis of SPR994 Treated Patients in Lead-in Cohort of Trial

CAMBRIDGE, MA, USA I October 03, 2019 I Spero Therapeutics, Inc. (Nasdaq:SPRO), a multi-asset clinical-stage biopharmaceutical company focused on identifying, developing and commercializing treatments in high unmet need areas involving multi-drug resistant (MDR) bacterial infections and rare diseases, today announced that an independent review committee evaluated pharmacokinetic data following enrollment of the first 70 patients in Spero’s ongoing ADAPT-PO pivotal Phase 3 clinical trial of SPR994, Spero’s oral carbapenem product candidate, and recommended that Spero continue the trial using the protocol-defined dose without modification. 

“The Phase 3 trial is designed to evaluate whether an oral-only regimen of SPR994 can achieve an outcome similar to that observed with an intravenous antibiotic therapy in patients with complicated urinary tract infections.   If SPR994 achieves this outcome and is ultimately approved, we believe it would represent a critical clinical and economic value proposition for the more than two million patients resistant to oral therapies currently used to treat such infections,” said Ankit Mahadevia, M.D., Chief Executive Officer of Spero Therapeutics.  “A primary objective of the independent review committee was to confirm that plasma levels of SPR994 in patients in the Phase 3 trial support the selected treatment dose consistent with our goals for the trial. We are very pleased that the independent review committee, after reviewing data from 33 patients who had been randomized to SPR994 in the Phase 3 trial, determined that the plasma levels of SPR994 in those patients were suitable and recommended that we continue the trial without dose modification.  This decision, based on patient data in context of our clinical trial, gives us additional confidence in SPR994’s potential to meet the needs of patients with resistant infections.  Enrollment continues to be on track, and we expect to report top-line data from the Phase 3 trial in the third quarter of 2020.”

The independent review committee reviewed interim plasma concentration data from 33 patients  who were randomized to SPR994 in the ongoing ADAPT-PO pivotal Phase 3 clinical trial for the treatment of complicated urinary tract infections (cUTI) and acute pyelonephritis (AP). ADAPT-PO is designed as a double-blind, double-dummy clinical trial to compare oral SPR994 dosed as 600 mg TID with a standard-of-care intravenous (IV) antibiotic, ertapenem, in approximately 1,200 patients with cUTI or AP, randomized 1:1 in each arm.  The Phase 3 trial will continue as planned and Spero expects to report top-line data in the third quarter of 2020.

About SPR994

SPR994 is Spero’s novel investigational oral formulation of tebipenem, a carbapenem-class antibiotic marketed by Meiji Seika Pharma Co. Ltd. (Meiji) in Japan as Orapenem® since 2009 for pediatric infections limited to pneumonia, otitis media and sinusitis. Carbapenems are an important class of antibiotics because they have been observed to be safe and effective against drug-resistant Gram-negative bacterial infections. Spero is conducting a pivotal Phase 3 clinical trial of SPR994 entitled ADAPT-PO (a Phase 3, randomized, double-blind, double-dummy, multicenter, prospective study to assess the efficacy, safety and pharmacokinetics of orally administered tebipenem pivoxil hydrobromide (SPR994) compared to intravenous ertapenem in patients with complicated urinary tract infection (cUTI) or acute pyelonephritis (AP)). SPR994 has been granted Qualified Infectious Disease Product (QIDP) and Fast Track designations by the FDA for the treatment of cUTI. 

About Spero

Spero Therapeutics, Inc. is a multi-asset, clinical-stage biopharmaceutical company focused on identifying, developing and commercializing novel treatments for multidrug-resistant (MDR) bacterial infections and rare diseases.

Spero’s lead product candidate, SPR994, is designed to be the first oral carbapenem-class antibiotic for use in adults to treat MDR Gram-negative infections.

Spero is also advancing SPR720, its novel oral therapy product candidate designed for the treatment of rare, orphan disease caused by pulmonary non-tuberculous mycobacterial (NTM) infections.

Spero also has a platform technology known as its Potentiator Platform that it believes will enable it to develop drugs that will expand the spectrum and potency of existing antibiotics, including formerly inactive antibiotics, against Gram-negative bacteria. Spero’s lead product candidates generated from its Potentiator Platform are two IV-administered agents, SPR206 and SPR741, designed to treat MDR Gram-negative infections in the hospital setting.

SPR994 Research Support

This project has been funded in part with Federal funds from the Department of Health and Human Services; Office of the Assistant Secretary for Preparedness and Response; Biomedical Advanced Research and Development Authority, under Contract No. HHSO100201800015C. 

SOURCE: Spero Pharmaceuticals

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