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GSK sees blockbuster potential in targeted cancer therapy after promising early data

Published by Global Banking & Finance Review

Posted on April 12, 2026

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· Last updated: April 13, 2026

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GSK sees blockbuster potential in targeted cancer therapy after promising early data
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By Bhanvi Satija LONDON, April 12 (Reuters) - British drugmaker GSK's experimental targeted cancer drug Mo-rez has blockbuster potential, its head of oncology research has told reporters, after early

GSK Reports Promising Early Data for Mo-rez Targeted Cancer Therapy

Breakthroughs and Business Impact of GSK's Mo-rez Cancer Drug

By Bhanvi Satija

Early Clinical Results Show Tumor Reduction

LONDON, April 12 (Reuters) - British drugmaker GSK's experimental targeted cancer drug Mo-rez has blockbuster potential, its head of oncology research has told reporters, after early data showed the drug helped shrink tumors in patients with advanced, hard-to-treat cancers. 

Expert Insights from GSK Leadership

"This is one of our priority assets at this stage," GSK's Hesham Abdullah said on a call with journalists discussing the early data, which is being presented at a medical conference in Puerto Rico on Sunday.

"Do we think it would be a blockbuster? Yes, absolutely," GSK's Hesham Abdullah said on the call.

Clinical Trial Outcomes

Initial results measured the proportion of patients who achieved a meaningful reduction in tumor size, defined as at least a 30% shrinkage. In platinum-resistant ovarian cancer, 62% of patients met that threshold, while 67% did so in endometrial cancer.

Momentum for GSK's Oncology Business

Market and Business Implications

DATA GIVE MOMENTUM TO GSK'S ONCOLOGY BUSINESS

Analysts have not yet projected future sales for mo-rez given early trial data. 

The data give momentum to GSK's fast-growing oncology business. CEO Luke Miels, who started in the role in January, has said the company will speed up work on new medicines, a shift Abdullah said is already being reflected in its product development. 

Leadership Perspective on Future Development

"I think it has been reflected in the type of pace that you are seeing and the type of conviction that we have in our programmes moving forward," he added.

Ongoing and Future Clinical Trials

GSK is testing Mo-rez in two late-stage trials in ovarian and endometrial cancers and plans to start three additional studies in coming months.

About Mo-rez and Market Potential

Mechanism and Licensing

Mo-rez, an antibody‑drug conjugate, targets the B7H4 protein found on gynaecological cancer cells but is largely absent from healthy tissue. The market for ADC treatments is projected to reach $31 billion by 2030.

GSK licensed the drug from China's Hansoh Pharma in 2023. 

(Reporting by Bhanvi Satija; Editing by David Holmes)

Key Takeaways

  • Mo‑rez (GSK5733584), a B7‑H4‑targeting ADC licensed from Hansoh Pharma in October 2023, demonstrated objective response rates of 62% in platinum‑resistant ovarian cancer and 67% in endometrial cancer in early data presented April 12 in Puerto Rico.
  • The ADC market is expanding rapidly: global forecasts range from ~$30 billion by early 2030s to as high as ~$39 billion by 2030, underscoring the potential commercial impact of breakthrough ADCs like Mo‑rez.
  • GSK’s oncology strategy, under new CEO Luke Miels since January 2026, emphasizes speed and conviction—Mo‑rez’s progress, including two late‑stage trials and three more in the pipeline, exemplifies this accelerated development approach.

References

Frequently Asked Questions

What is GSK's Mo-rez cancer drug?
Mo-rez is an experimental targeted cancer therapy developed by GSK, shown to help shrink tumors in advanced, hard-to-treat cancers.
What cancers is Mo-rez being tested for?
Mo-rez is currently being tested in late-stage trials for ovarian and endometrial cancers.
How effective is Mo-rez according to early data?
Initial data shows tumor reduction in 62% of platinum-resistant ovarian cancer patients and 67% in endometrial cancer.
What makes Mo-rez a potential blockbuster drug?
Early positive trial results and large market projections for antibody-drug conjugates position Mo-rez as a potential blockbuster therapy.
Who did GSK license Mo-rez from?
GSK licensed Mo-rez from China's Hansoh Pharma in 2023.

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