Insight
GSK ovarian and womb cancer drug shows promise in early trial
GSK said its ovarian cancer drug shrank or cleared tumours in more than 60 per cent of patients in an early trial as CCO Luke Miels pushes faster development.
The company said that in an early-stage trial, Mocertatug Rezetecan, known as Mo-Rez, shrank or eliminated tumours in 62 per cent of patients with ovarian cancer after chemotherapy had failed, and in 67 per cent of those with endometrial cancer.
Hesham Abdullah, GSK’s global head of cancer research and development, said: “Treatment of gynaecological cancers remains a major challenge, with a pressing need for new therapies that offer improved response rates.
“With Mo-Rez we now have compelling evidence of a promising clinical profile.”
GSK acquired the Mo-Rez treatment, an antibody-drug conjugate, from China’s Hansoh Pharma in late 2023 and has trialled it in 224 patients around the world, including the UK, over the past year.
Only a few patients needed to stop treatment because of side effects, the most common being nausea.
It is given every three weeks by intravenous infusion, meaning directly into a vein.
Combined with data from a separate intermediate trial in China, the results have given the British drugmaker the confidence to go straight to late-stage trials, with five clinical studies planned globally in the next few months, including on patients in the UK.
Speaking to journalists before the conference, Abdullah described Mo-Rez as a “key asset” in the company’s growing cancer portfolio.
It is expected to be a blockbuster drug, with peak annual sales of more than £2bn, which GSK hopes will help it achieve its 2031 sales target of £40bn.
A few years ago GSK did not have any cancer drugs on the market, but it now has four approved medicines and 13 in clinical development.
Last year, oncology generated nearly £2bn in sales, up 43 per cent from 2024, with sales of its endometrial cancer drug Jemperli rising 89 per cent.
The Women and Equalities Committee (WEC) has warned against “financial half measures” on women’s health as the government published its response to the report.
Ministers launched the renewed Women’s Health Strategy in April after the committee’s March report concluded it was not convinced that the menstrual and gynaecological needs of young women and girls had been sufficiently prioritised in wider healthcare reforms.
It followed the committee’s 2024 “medical misogyny” report, which found women with painful reproductive health conditions such as endometriosis, adenomyosis and heavy menstrual bleeding were frequently finding their symptoms “normalised” and their “pain dismissed” when seeking help.
In both reports, MPs called on the government to recognise the benefits of increased investment in early diagnosis and treatment of women’s reproductive health conditions and provide additional funding needed to transform the support available to millions of women.
In its response, published on 26 May as a command paper, the Department of Health and Social Care outlined action on reducing gynae waiting times, ensuring procedures are conducted with women’s full consent and adequate pain relief, and improving access to contraception for menstrual healthcare in line with the committee’s recommendations.
It said: “The government agrees with the committee’s overarching findings and recommendations for improving women’s health outcomes and experiences.
“We acknowledge the impact that menstrual health conditions can have on women’s lives, relationships, and participation in education and the workforce.
“We recognise that more needs to be done to support women with menstrual health conditions, particularly around listening to women, improving information and education, and enhancing patient experience.”
However, there was no commitment to increase school nurse provision, no measurable actions and targets on countering online misinformation, no new commitments to end inappropriate censorship of women’s online health content, and no further initiatives on tackling racial discrimination or understanding the menstrual wellbeing needs of young disabled and Deaf women.
The response comes after analysis by The Times suggested the government is allocating 60 per cent more funding to its men’s health strategy than to its renewed strategy for women’s health.
Sarah Owen, chair of the Women and Equalities Committee and Labour MP, said: “WEC’s 2024 ‘medical misogyny’ report warned 18 months ago of women in unnecessary pain and undiagnosed for years and called on the Government to recognise the benefits of increased investment in early diagnosis and treatment.
“Our follow up report this March cautioned girls’ and women’s health are not being sufficiently prioritised in system-wide NHS reforms, while initiatives which have proven to be successful in reducing waiting lists and improving women’s healthcare access, such as women’s health hubs, risked being scaled back or discontinued.
“While it’s welcome to see a focus on tackling ‘medical misogyny’ in April’s renewed Women’s Health Strategy and an emphasis on women’s voices being heard, this must be backed by adequate funding, not financial half measures, particularly when compared to men’s health.
“Significant questions remain following today’s response publication over the adequacy of investment being provided, including for workforce training, menstrual health education in schools, research and additional ring-fenced funding for women’s health hubs to deliver services within the emerging neighbourhood health framework.
“There are both opportunities and risks when it comes to increasing use of technology in women’s healthcare.
“As the Committee’s report set out, social media companies should be held to account for inappropriate and disgraceful ‘shadow banning’ censorship of important women’s health content and there should be a rigorous approach to tackling the risks from ineffective, unsafe and exploitative for-profit FemTech apps.
“The Government should take the problem of ‘shadow banning’ more seriously.
“A strategy which does not fully address the concerns set out in WEC’s report, alongside measurable actions and timescales, will only scratch the surface of the issues facing women’s health.
“WEC will keep a close eye on progress and continue to push for long overdue tangible change for women and girls.”
An early PET scan after one cycle of chemotherapy may help predict how aggressive breast cancer responds to treatment, a study suggests.
Research led by The Institute of Cancer Research, London and King’s College London suggests that an early scan taken after one cycle of chemotherapy could help predict how well a patient’s cancer will respond to treatment.
The study focused on patients with triple-negative breast cancer (TNBC), an aggressive form of the disease in which cancer cells lack receptors for the hormones oestrogen and progesterone, as well as the HER2 protein.
Patients with TNBC are usually treated with chemotherapy prior to surgery. While many respond well, residual disease at surgery, typically around six months later, is associated with a significantly poorer prognosis. Identifying people sooner who are unlikely to respond remains a major clinical challenge.
The research explored whether using PET imaging shortly after treatment begins, rather than relying only on MRI scans later in the treatment process, could provide earlier insight into how a patient’s cancer is responding. Twenty-two patients were recruited, with fourteen undergoing FDG-PET scans before treatment and after the first cycle of chemotherapy.
The findings, published in Clinical Cancer Research, showed that changes seen on PET scans after just one cycle of chemotherapy were strongly associated with subsequent response, including whether there was no detectable cancer, known as a complete response, by the end of treatment. Importantly, early PET response showed stronger associations with treatment outcomes than standard mid-treatment MRI scans in this study.
Being able to identify patients who are not responding well at an early stage could allow clinicians to adjust treatment sooner or consider alternative approaches. These findings may also support future strategies to better tailor treatment intensity to individual patients.
The study also compared two types of PET tracers, FDG and FLT, to determine which was most suitable. While both met the study’s technical criteria, FDG-PET was selected for further evaluation due to its better image quality, greater consistency and wider use in clinical practice.
The research also explored how imaging changes after just one cycle of chemotherapy relate to the body’s immune response to treatment. Biopsies taken before and after the first cycle of chemotherapy showed that an increase in immune cells within the tumour was strongly associated with both early PET changes and improved treatment outcomes.
The researchers emphasise that these findings now need to be validated in larger studies. Future work will aim to confirm these results in broader patient groups and explore more accessible imaging approaches, such as ultrasound, alongside PET and MRI.
Sheeba Irshad, professor of cancer immunology at King’s College London and lead of the Breast Cancer Now KCL Research Unit, said:
“In patients who had PET scans both before treatment and after the first cycle, we found that this early scan could predict whether they were likely to achieve a complete response by the end of treatment. These findings highlight the potential of early imaging to guide treatment decisions, and now need to be validated in larger, modern clinical trials.”
Andrew Tutt, professor of breast oncology at The Institute of Cancer Research, London, said:
“Research that helps us determine early who is already benefitting from standard neoadjuvant chemotherapy and who might benefit from clinical trials to find better treatments is vital. This study shows that FDG-PET may have great value in this regard. We hope to be able to design studies that further investigate and validate these findings.”
The study was supported by funding from King’s College London and Guy’s and St Thomas’ NHS Foundation Trust, Breast Cancer Now, Cancer Research UK, and Guy’s and St Thomas’ Charity.
Ki-67, a protein used to measure tumour growth, may also help prevent chromosome errors that drive cancer, a study suggests.
The findings could change how scientists view Ki-67, a marker commonly used in breast cancer and other tumours to assess how quickly cancer cells are growing.
Researchers found the protein may help preserve genome stability by maintaining the structural integrity of centromeres, key parts of chromosomes that help ensure DNA is shared correctly during cell division.
The research was led by professor Paola Vagnarelli at Brunel University of London in collaboration with scientists at the University of Edinburgh and the Technical University of Berlin.
Professor Vagnarelli said: “Doctors already measure Ki-67 to see how aggressive a cancer might be. But our results suggest it is actually helping maintain genome stability.
“That means it may be more than a marker. It could potentially also be a therapeutic target.”
The study examined three proteins that attach to chromosomes during cell division and help rebuild the molecular system that tells each new cell what kind of cell it is.
Every human cell carries identical DNA. What makes a liver cell different from a brain cell is which genes are switched on and which are kept inactive.
When a cell divides, that entire system of switches must be rebuilt. The three proteins involved in this process were Ki-67, Repo-Man and PNUTS.
Vagnarelli’s team developed a method that individually removes each protein from a living cell at the precise point of division. Older techniques could not isolate that moment cleanly.
They found that cells rely on all three proteins to reset themselves after division, but each failed in a different way when removed.
Without PNUTS, gene activity spiralled out of control and thousands of genes switched on at once.
Without Repo-Man, cells escaped safety checkpoints that usually stop damaged or abnormal cells from continuing to divide.
“What we didn’t expect was how clean the separation was,” said Vagnarelli.
Each protein fails in its own specific way. There is no redundancy, no safety net. Which means there are three separate points at which this process can go wrong.
“When the system breaks down, cells can emerge with the wrong number of chromosomes. That condition, called aneuploidy, is seen in disorders such as Down syndrome and in many cancers.
“We also found that these chromosome errors can trigger inflammatory signals inside the cell.”
Aneuploidy means a cell has too many or too few chromosomes, which can disrupt normal growth and function.
Inflammatory signals are chemical messages that can make a cell behave as if it is responding to injury or infection.
“These cells behave almost as if they are under attack,” said Vagnarelli.
“The immune response switches on because the genome is unstable.
“That link between chromosome imbalance and inflammation could help explain patterns we see in several diseases.”
The researchers said the findings may help cancer scientists better understand how chromosome instability, loss of gene regulation and cells dividing before they are ready contribute to tumour growth.
They said understanding the normal machinery that prevents these errors may help researchers find ways to push cancer cells into making mistakes they cannot survive.
“We now have a clearer map of the machinery that resets the cell after division,” said Vagnarelli.
“That knowledge gives us a starting point for thinking about new therapeutic approaches.”
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