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Research roundup: Overcoming EGFR-targeted therapy resistance in breast cancer, and more

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Femtech World explores the latest developments in women’s health research – from overcoming EGFR-targeted therapy resistance in breast cancer to understanding obesity’s role in triple-negative breast cancer, and more.

EGFR-targeted therapy resistance in breast cancer

Researchers have reviewed current research on why Epidermal Growth Factor Receptor (EGFR)-targeted therapies often fail in breast and head and neck cancers.

The article explores how cancer cells evade these treatments by activating alternative survival pathways and offers an in-depth look at the molecular barriers to EGFR inhibition, providing insights that could inform the development of more effective and durable treatments.

EGFR is a critical protein that regulates cell growth and survival, and it is frequently overexpressed in breast and head and neck cancers. Although therapies targeting EGFR showed early promise, resistance has become a significant challenge.

In breast cancer, resistance mechanisms include the movement of EGFR from the cell surface into the nucleus, where it promotes DNA repair, as well as ligand-dependent activation that helps tumour growth despite therapy.

The review describes how tumour cells in these cancers commonly activate other receptor tyrosine kinases (RTKs), such as MET, AXL, and RON, to continue growing even when EGFR is blocked.

By analysing these resistance mechanisms, the authors highlight combination therapies from current research that target EGFR and other key molecular pathways.

Strategies such as dual inhibition of EGFR and MET or blocking inflammation-driven survival signals may enhance treatment outcomes.

Several clinical trials are evaluating these approaches in patients.

For example, in breast cancer, combinations of EGFR inhibitors with chemotherapy and immune checkpoint inhibitors are being tested to improve responses, particularly in triple-negative breast cancer.

These efforts aim to overcome resistance and provide more effective treatment options for patients with EGFR-driven tumours.

The review also emphasises the necessity of identifying biomarkers to predict which patients are most likely to benefit from EGFR-based therapies.

Screening women with diabetes for intent to conceive at every doctor visit

Adverse pregnancy outcomes such as miscarriages or birth defects are common in individuals with pre-existing diabetes and are often related to modifiable factors such as maternal high blood sugar and body mass index (BMI).

With this in mind, a new, joint guideline released by the Endocrine Society and the European Society of Endocrinology (ESE) has recommended that women with diabetes receive proper preconception care.

This includes access to emerging diabetes technology and therapeutics to manage their blood sugar before, during and after pregnancy.

Screening women of reproductive age who have diabetes for intent to conceive at every reproductive, diabetes and primary care visit helps ensure they get the appropriate preconception care and reduces health risks.

Care suggestions from the guidelines include screening by asking all women with diabetes of reproductive age about intent to conceive at every reproductive, diabetes and primary care visit; timing delivery before 39 weeks for pregnant individuals with diabetes as the risks associated with continued pregnancy may outweigh those of early delivery; discontinuing anti-obesity medications called GLP-1s prior to pregnancy; and, avoiding prescribing metformin in pregnant individuals with preexisting diabetes already on insulin.

Further suggestions include using diabetes technology, recommending hybrid closed loop systems for pregnant individuals with type 1 diabetes; and suggesting that women with diabetes use contraception until they are ready to become pregnant.

Premenstrual symptoms linked to increased risk of cardiovascular disease

A new study has revealed that women diagnosed with premenstrual symptoms have a slightly increased risk of developing cardiovascular disease later in life.

Premenstrual symptoms include premenstrual syndrome (PMS) and the more severe form, premenstrual dysphoric disorder (PMDD).

The study followed more than 99,000 women with premenstrual symptoms for up to 22 years, comparing their health with women without these symptoms – both in the general population and by comparing them with their own sisters to take into account hereditary factors and upbringing.

The results show that women with premenstrual symptoms had about a 10 per cent higher risk of developing cardiovascular disease.

When the researchers also looked at different types of cardiovascular disease, they found that the link was particularly strong for heart rhythm disorders (arrhythmias), where the risk was 31 per cent higher, and for stroke caused by a blood clot, where the risk was 27 per cent higher.

Even after the researchers took into account other factors such as smoking, BMI and mental health, the link between premenstrual symptoms and increased disease risk remained.

Research has not yet identified the cause of this link, but the researchers behind the study suggest three possible explanations.

One is that women with premenstrual symptoms may have a disrupted regulation of the renin-angiotensin-aldosterone system (RAAS), which controls blood pressure and fluid balance in the body, among other things.

The second is that these women have increased levels of inflammation in the body, which is a known risk factor for atherosclerosis and other heart problems.

Finally, it may be because women with premenstrual symptoms may have metabolic abnormalities, which are linked to an increased risk of both stroke and heart attack.

Obesity’s role in triple-negative breast cancer

Among the various subtypes of breast cancer, triple-negative breast cancer (TNBC) stands out due to its aggressive nature and poor prognosis.

It is characterised by the absence of three critical hormone receptors: oestrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2, which are common targets for breast cancer therapies.

Consequently, TNBC lacks targeted treatment options, relying primarily on conventional cytotoxic therapies, often referred to as chemotherapy in which drugs kill or damage cancer cells.

This limitation contributes to the subtype’s high recurrence rates and significantly lower survival rates compared to other forms of breast cancer.

Researchers have now discovered that exosomes, messenger nanovesicles that carry proteins, RNA, and other molecules to other cells, that are released into the blood by different organs and tissues in obese, insulin-resistant models, carry signals that turn otherwise slow-moving TNBC cells into highly mobile, invasive cells.

This is the first time a study has shown that exosomes from an obese, diabetic environment directly cause this aggressive change in TNBC, and that Rho-proteins (molecular switches that turn “on” or turn “off” signal transduction pathways) play a key role in driving the change.

According to the researchers, by revealing how obesity-driven exosomes push aggressive breast cancer to spread, they hope to unlock new blood tests and drug targets, like Rho-protein inhibitors that stop this deadly process.

“These findings support the development of clinical tests to quantify obesity-derived exosomes in patient plasma as noninvasive biomarkers of metastatic risk, allowing earlier identification and tailored management of aggressive TNBC,” said corresponding author Gerald Denis, Shipley Prostate Cancer Research professor and professor of pharmacology, physiology and biophysics.

“Ultimately, our goal is to improve survival and quality of life for patients facing both metabolic disease and hard-to-treat cancers.”

Mental health

Pilates may improve heart and metabolic health in sedentary women, study finds

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A four-week Pilates programme may improve heart, metabolic and stress measures in previously sedentary women, a small study suggests.

Pilates is a mind-body form of exercise that has been linked to better fitness, balance, posture, muscular endurance, mental wellbeing and quality of life in different groups.

Built around breathing, concentration, control, precision, centring and flow, Pilates is already used in physiotherapy, rehabilitation and preventive health. The new study looked at whether a structured four-week programme could affect cardiovascular, metabolic, body and stress-related measures in sedentary adult women.

The longitudinal study included 30 sedentary women split into two age groups, 30 to 40 and 50 to 60.

All participants completed a standardised, supervised Pilates programme lasting four weeks, with three sessions a week lasting 50 to 60 minutes.

Researchers measured resting heart rate, systolic and diastolic blood pressure, body mass index, abdominal circumference, fasting blood glucose and serum cortisol at the start and end of the programme.

Systolic and diastolic blood pressure are the top and bottom readings in a blood pressure test. Cortisol is a hormone linked to the body’s stress response.

The four-week Pilates programme was linked to improvements in cardiovascular, metabolic, body and neuroendocrine measures, although not every change reached statistical significance within each age group.

In the younger group, significant reductions were seen in heart rate, blood pressure, body mass index and fasting blood glucose after the intervention.

The reduction in blood pressure after the programme was significantly greater in the older group than in the younger group.

Older participants also showed a greater reduction in glucose and cortisol levels after the intervention than younger participants.

Analysis also found significant links between cardiovascular, metabolic and neuroendocrine changes.

In the younger group, this was particularly seen between heart rate and blood pressure responses.

In the older group, it was particularly seen between changes in body mass index and fasting glucose.

The findings suggest Pilates could be a useful multidimensional exercise approach for cardiometabolic health and stress regulation in previously sedentary women.

The researchers said the larger reduction in blood pressure seen in the older group may reflect a higher cardiometabolic burden at the start, leaving more room for improvement after the programme.

The greater reduction in fasting glucose and cortisol in older participants may similarly suggest that people with higher baseline metabolic and neuroendocrine dysfunction could benefit more from structured exercise such as Pilates.

Although Pilates is known to improve body composition through energy use, neuromuscular activation and support for healthier habits, the researchers said the fall in body mass index over four weeks is unlikely to be explained by Pilates alone.

They noted that participants were also told to avoid alcohol, sugar-containing products and sugar-sweetened drinks during the intervention, which may have contributed to the change.

In the younger group, the link between heart rate and blood pressure suggested coordinated cardiovascular responses after Pilates.

The researchers also found that cortisol appeared to be linked to blood pressure and body mass index, suggesting stress-related changes may be tied to cardiovascular and body regulation after the intervention.

In the older group, the link between body mass index and fasting glucose highlighted the relationship between body fat and metabolic regulation.

A positive link between blood pressure and body mass index in this group also suggested that improvements in vascular regulation may be associated with reductions in body mass.

Overall, the findings suggest Pilates-related physiological changes may involve interconnected cardiovascular, body, metabolic and neuroendocrine mechanisms, with different response patterns by age.

The study has important limits. It did not include a non-exercise control group, so it cannot prove Pilates directly caused the changes.

The sample size was also small, which limits how far the findings can be applied more widely.

The authors also noted that cortisol was measured using a single fasting morning sample, which limits conclusions about broader hypothalamic-pituitary-adrenal axis regulation, the system involved in the body’s stress response.

They said larger studies with longer follow-up will be needed to confirm whether Pilates causes these physiological changes over time.

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Being female not a universal stroke risk factor for patients with AF, study finds

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Female sex may not raise stroke risk across all atrial fibrillation (AF) patients, with higher risk mainly seen in women aged 75 and older, a study suggests.

Researchers said stroke prevention for women with the condition should be more personalised, especially for patients under 75.

Dr Amitabh C Pandey, director of cardiovascular translational research at Tulane University School of Medicine, said: “For years, female sex has been included as a risk factor along with other factors such as high blood pressure and diabetes, meaning women were more likely to be prescribed anticoagulants.

“Our study shows younger women may not have as much added stroke risk as previously thought, while older women, particularly those over 75, appear to have a higher risk that deserves close attention.”

The new Tulane University study challenges a long-standing assumption in heart care that being female automatically increases stroke risk for patients with atrial fibrillation.

Atrial fibrillation, often called AF, is a common heart rhythm disorder that causes the heart to beat irregularly.

It is associated with a higher risk of stroke and is often treated with anticoagulants, also known as blood thinners.

The study found that stroke risk did not increase equally across all female patients with AF.

Instead, researchers said being female may act more as a risk modifier, with increased stroke risk seen primarily among women aged 75 and older or those with a greater burden of other health conditions.

Clinicians often use a scoring system to decide whether people with AF should be prescribed blood thinners.

The system gives points for factors including age, heart failure, diabetes, previous stroke, vascular disease and high blood pressure.

Women also receive one point for sex alone.

Researchers said this can mean women with AF become eligible for blood thinners earlier or more often than men with otherwise similar risk profiles.

While blood thinners can help prevent clot-related strokes, they can also increase the risk of bruising, prolonged bleeding, gastrointestinal bleeding and other serious complications.

The researchers analysed approximately 950,000 patients with AF using TriNetX, a large anonymised electronic health record database.

They compared stroke outcomes between male and female patients across three age groups: younger than 65, 65 to 74, and 75 and older.

Male and female patients were matched based on age, other health problems and whether they had been prescribed anticoagulation medicine.

Among patients younger than 75, the study found no significant difference in one-year stroke risk between men and women.

However, among patients aged 75 and older, women had a modest but statistically significant increase in stroke risk compared with men.

In patients aged 75 and older with no additional risk factors beyond age, women had about one additional stroke per 629 patients compared with their male counterparts.

The findings support growing interest in a newer AF risk score, known as CHA2DS2-VA, which removes sex as a standalone risk factor.

However, researchers said more studies are needed and medical guidance remains inconsistent.

Han Feng, assistant professor at Tulane University School of Medicine, said: “This general approach came from women being underrepresented in AFib trials and studies comprising only about one-third of study populations.

“Our study shows not all women with AFib have the same risk profile, and these decisions should be individualised.

Pandey said: “These findings highlight the need for modern tools and approaches that can personalise risk profiles to individuals.

“The goal is not to undertreat patients who need stroke prevention, but to better identify who is most likely to benefit from anticoagulation and who may be exposed to unnecessary risk.”

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Hormonal health

Iron deficiency in women: The tiredness everyone normalises

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Article produced in association with Spital Clinic

Feeling permanently tired has become so normal for so many women that most of us have stopped questioning it. But one of the most common reasons behind it is also one of the easiest to miss – and one of the most satisfying to fix.

The tiredness that gets explained away

There’s a particular kind of tired that a lot of women simply live with. The mid-afternoon slump that no amount of coffee touches. Needing an early night and still waking up flat. Putting it all down to work, kids, stress, age or hormones – anything except a cause you could actually do something about.

Often, though, that’s exactly what it is: a cause you could do something about. Low iron is one of the most common reasons women feel wiped out, and because it builds so gradually, it rarely announces itself. You don’t wake up one morning feeling different. You just slowly get used to running on less, until “exhausted” starts to feel like your baseline.

Why women are far more likely to run low

Iron is what your body uses to carry oxygen around in your blood. When levels fall, everything has to work a little harder to do the same job – which is why feeling tired is usually the very first thing you notice.

The reason this affects women so disproportionately is simple: periods. Every cycle carries a small iron cost, and over months and years that quietly adds up. Pregnancy adds to the demand too, when the body’s iron needs rise sharply.

But heavy periods are the big one – left unchecked, they can steadily drain your iron, which is why the NHS treats them as something worth looking into rather than just putting up with.

So if your periods sit on the heavier side, you’re not just dealing with the inconvenience in the moment – you may be slowly draining your iron stores at the same time, month after month.

The reassuring part is that heavy periods can be treated, so it’s worth having them looked at rather than soldiering on.

What low iron actually feels like

Tiredness is the headline, but it’s rarely the only clue. Low iron can show up as feeling breathless going up stairs you used to manage without thinking, a foggy, can’t-quite-focus feeling, looking paler than usual, or noticing your heart racing or thumping for no obvious reason.

Then there are the stranger signs people almost never connect to iron: brittle nails, more hair than usual collecting in the brush, restless legs at night, and – oddly – craving and crunching ice. On their own, each of these is easy to shrug off. Lined up together, they’re very often the same story.

Why it so often slips under the radar

Part of the problem is that none of these symptoms screams “iron.” They’re vague, they overlap with ordinary life, and they arrive slowly enough that you adjust without realising. Most of us are also remarkably good at minimising our own tiredness – we assume everyone feels like this, so there’s nothing to mention.

The result is that low iron can go unaddressed for years, not because it’s hard to find, but because nobody thinks to look. It’s a genuinely common, genuinely treatable issue that quietly chips away at how good you’re allowed to feel.

When “heavy” periods are actually heavy

Here’s the tricky bit: most women have no real benchmark for what counts as heavy, because the only period we ever experience is our own. A useful rule of thumb is needing to change a pad or tampon every hour or two, bleeding that lasts longer than seven days, or passing clots bigger than a 10p coin.

NICE frames it even more usefully: periods count as heavy if they’re getting in the way of your life – physically, emotionally or socially. You don’t have to measure anything. If you’re planning your week around your period, doubling up on protection, or it’s leaving you drained, that’s reason enough to take it seriously.

And the good part is they don’t have to be permanent. If yours have crept up over time, getting them under control is worth it in its own right – and it often tackles the iron problem at its source, rather than topping you up only to lose it again next month.

How you actually find out

You can’t tell your iron levels from how you feel. Plenty of women feel rough with results that look “borderline fine,” and some feel reasonably okay while their reserves are already running low.

The only way to know is a straightforward blood test that checks both your blood count and your ferritin – the marker that reflects how much iron you’ve actually got stored away.

Ferritin is the one that matters here, because it tends to drop first, before a standard anaemia test would flag anything as wrong. That’s exactly why a woman can be told her bloods are “normal” and still feel exhausted: the headline number looks acceptable, but the reserves sitting behind it have been running down for a while.

The good news: it’s very fixable

This is the part worth holding onto. Iron deficiency is one of the more rewarding things to put right. The NHS approach is usually a course of iron tablets over several months to rebuild your stores, paired with a source of vitamin C – even just a glass of orange juice – to help your body absorb them properly.

Alongside that, dealing with whatever’s causing the loss in the first place is what stops you ending up back at square one.

Most women start to notice the difference within a few weeks, often well before their levels are fully restored. The fog lifts, the stairs get easier, and the version of “normal” you’d quietly resigned yourself to turns out not to have been normal at all.

The takeaway

The exhaustion so many women treat as a fixed fact of life frequently isn’t one. Low iron is common, it’s quick to check, and it’s straightforward to put right – but only if someone actually looks for it.

If you’ve been tired for longer than you can remember, especially if your periods are heavy, it’s worth getting your iron checked rather than explaining it away for another year. Speaking to a GP is usually all it takes to get that started – and more often than not, the fix turns out to be far simpler than the months of tiredness would suggest.

Disclaimer: This article is produced for informational purposes only and does not constitute medical advice, diagnosis or treatment. Clinical guidance referenced reflects published NHS and NICE information as at May 2026. Individual circumstances vary; readers are advised to consult a qualified healthcare professional before acting on any information in this article. This piece was produced in association with Spital Clinic, which provided background clinical information for editorial purposes. Hyperlinks to external sources are included for reference only and do not represent an endorsement of any product, service or organisation.

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