Spero and GSK report success in pivotal cUTI antibiotic trial

Published 28/05/2025, 12:06
Spero and GSK report success in pivotal cUTI antibiotic trial

CAMBRIDGE, Mass. - Spero Therapeutics, Inc. (NASDAQ: SPRO) and GSK plc (LSE/NYSE: GSK) announced positive outcomes from their Phase 3 trial of tebipenem HBr, a potentially groundbreaking oral antibiotic treatment for complicated urinary tract infections (cUTIs). GSK, with a market capitalization of $79.6 billion and robust gross profit margins of 72%, continues to demonstrate its strength as a prominent player in the pharmaceutical industry. According to InvestingPro analysis, GSK is currently trading below its Fair Value, suggesting potential upside opportunity for investors. The PIVOT-PO trial, which included 1,690 patients, met its primary endpoint, showing that tebipenem HBr was non-inferior to the intravenous antibiotic imipenem-cilastatin.

The Independent Data Monitoring Committee’s pre-specified interim analysis led to the early conclusion of the trial due to the efficacy of tebipenem HBr. The trial aimed to assess the overall response, which is a composite of clinical cure and microbiological eradication, at the test-of-cure visit for hospitalized adult patients with cUTIs, including pyelonephritis.

No new safety concerns were identified during the trial, with diarrhea and headache being the most commonly reported adverse events. Full results from the trial are to be presented at an upcoming scientific congress and are slated for publication in a peer-reviewed journal.

GSK intends to include the trial data in a US Food and Drug Administration (FDA) filing planned for the second half of 2025. If approved, tebipenem HBr could become the first oral carbapenem antibiotic available in the US for cUTI patients, potentially altering the current treatment landscape which heavily relies on hospital-based intravenous administration.

Complicated UTIs are a significant health concern in the US, with approximately 2.9 million cases treated annually. These infections often involve multi-drug-resistant pathogens and can lead to severe complications like sepsis and septic shock. The development of an oral treatment option like tebipenem HBr could reduce the necessity for hospital visits and help manage the over $6 billion in annual healthcare costs attributed to these infections. GSK’s strong financial position, with annual revenue exceeding $40.7 billion and a consistent dividend yield of 4.28%, positions it well to commercialize this treatment effectively. For deeper insights into GSK’s financial health and growth prospects, including 8 additional ProTips, explore InvestingPro’s comprehensive analysis tools and Pro Research Report.

The development of tebipenem HBr has been partially funded by the U.S. Department of Health and Human Services; Administration for Strategic Preparedness and Response; Biomedical Advanced Research and Development Authority (BARDA).

Esther Rajavelu, CEO of Spero, expressed confidence in tebipenem HBr’s potential impact on cUTI treatment. Tony Wood, Chief Scientific Officer at GSK, highlighted the significance of having effective oral treatments for drug-resistant infections, which could improve patient experience and reduce healthcare costs. With GSK’s strong financial health score of "GREAT" from InvestingPro and expected net income growth this year, the company appears well-positioned to capitalize on this market opportunity.

This news is based on a press release statement from Spero Therapeutics, Inc.

In other recent news, GSK reported first-quarter earnings and revenue that exceeded analyst expectations. The pharmaceutical company posted adjusted earnings per share of $1.20, surpassing the consensus estimate of $1.02, with revenue reaching $10.06 billion, higher than the expected $9.48 billion. GSK’s Specialty Medicines segment was a significant contributor, showing a 17% increase in sales. In another development, GSK announced the acquisition of efimosfermin alfa, a treatment for steatotic liver disease, from Boston Pharmaceuticals for $1.2 billion, with potential milestone payments of $800 million. This acquisition is expected to enhance GSK’s hepatology pipeline. Meanwhile, the company decided to halt the development of belrestotug, an anti-TIGIT monoclonal antibody, after phase 2 studies did not meet efficacy criteria. Additionally, GSK received FDA approval for Nucala as a treatment for eosinophilic COPD, offering a new option for patients with frequent exacerbations. These developments reflect GSK’s ongoing efforts to expand its portfolio and improve treatment options across various medical fields.

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