Day: May 27, 2026

Categories : ExerciseTags : Leave a comment

Early Fitness Linked to Healthier Arteries

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Photo by Ketut Subiyanto on Unsplash

People with good physical fitness in their 30s and 50s have more elastic arteries later in life. This is shown in a new study from Karolinska Institutet, published in the journal Scientific Reports. The association remains regardless of cholesterol levels and other risk factors.

Cardiovascular disease is the leading cause of death worldwide. One early sign of increased risk is stiffening of the arteries, which can contribute to heart attack and stroke. In the present study, researchers investigated whether physical fitness earlier in life can predict how elastic the blood vessels are in older age.

The study is based on data from the Swedish longitudinal study SPAF‑1958, led by Maria Westerståhl, senior lecturer at the Department of Laboratory Medicine, where 425 individuals were followed across adulthood. Participants were examined at ages 34, 52, and 63. The researchers assessed fitness using a cycle ergometer test, analysed blood samples to study lipids, and measured arterial stiffness at age 63 using a non-invasive method.

Fitness more important than blood lipids

The results show that individuals with higher fitness at ages 34 and 52 had more elastic arteries at age 63. The association remained even after accounting for factors such as blood pressure, body weight, smoking, and cholesterol levels. However, neither cholesterol nor more advanced measures of so-called “good” HDL cholesterol could predict arterial stiffness.

“Our findings show that good physical fitness early in life is linked to vascular health later in life, independently of traditional risk factors,” says Andrea Tryfonos, postdoctoral researcher at the Department of Laboratory Medicine, Karolinska Institutet.

According to the researchers, the results suggest that regular physical activity may have long-term effects on cardiovascular health that are not captured by blood lipids and other common risk markers alone.

“This highlights the importance of maintaining good fitness from early adulthood to reduce the risk of cardiovascular disease,” says Andrea Tryfonos.

Next step

The researchers are now planning a follow-up of the participants at age 68 to investigate how changes in fitness over time affect vascular health later in life.

The study was conducted in collaboration with the division of clinical physiology and the division of clinical chemistry at the department of laboratory medicine, as well as Karolinska University Hospital in Huddinge. Information on funding and potential conflicts of interest is not available in the provided material.

Source: Karolinska Institutet

Categories : Cancer GeneticsTags : Leave a comment

Gene Analysis Predicts Breast Cancer Response to Chemotherapy

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Photo by National Cancer Institute on Unsplash

A new study from Karolinska Institutet shows that gene analysis of breast cancer tumours can identify patients who do not benefit from chemotherapy given before surgery. The findings, published in the journal Nature Communications, could in the long term contribute to more personalised treatment.

The study included 179 patients with hormone dependent, HER2 negative breast cancer who took part in the Swedish PREDIX LumB trial. Before surgery, all patients received both treatments, but in different sequences. They were given either chemotherapy followed by hormone blocking therapy together with the drug palbociclib, which slows the division of cancer cells, or the reverse sequence.

When the researchers analysed the results, they found that the treatments led to similar reductions in tumour size overall. Survival was also similar regardless of whether treatment started with chemotherapy or with palbociclib and hormone blocking therapy.

Not all tumours responded

At the same time, the analyses showed that there was a subgroup of tumours with a poorer response to chemotherapy but a better response to palbociclib in combination with hormone‑blocking therapy.

To understand why some tumours did not respond to chemotherapy, the researchers analysed tumour gene expression, how active different genes are in the tumour, in tissue samples taken before treatment started. Based on these analyses, they developed a model called CDKPredX, which can identify tumours that respond poorly to chemotherapy but better to palbociclib combined with hormone blocking therapy.

“Today, we lack reliable ways to determine in advance which patients will actually benefit from chemotherapy before surgery. Our results show that tumour gene expression can provide important information in this respect,” says first author Alexios Matikas, docent at the Department of Oncology‑Pathology, Karolinska Institutet. 

The model is based on patterns of gene expression in the tumour, including genes involved in cell division, hormone signalling and the immune system. When the researchers tested the model in other patient groups, they observed similar patterns.

Further studies are needed

“In the longer term, this type of analysis could help patients avoid treatments that do not benefit them, such as chemotherapy, and instead receive treatment that has a better chance of working. At the same time, further studies are needed before the method can be used in clinical practice,” says senior author Theodoros Foukakis, professor at the same department. 

The researchers emphasise that the study is exploratory and that the genetic analysis is not yet ready for clinical use. Nevertheless, the results provide new insights into why different tumours respond differently to treatment.

Source: Karolinska Institutet

Categories : Hospitals Medical IndustryTags : Leave a comment

SAMED Calls for Urgent Action as Gauteng Health Supplier Debt Crisis Reaches Critical Point

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The South African Medical Technology Industry Association (SAMED) has called for urgent and measurable action to resolve the escalating supplier debt crisis within Gauteng’s public health system, warning that continued delays in payments and procurement failures are placing both healthcare delivery and supplier sustainability at serious risk.

The call comes ahead of the Gauteng Department of Health’s hospital-level engagements with suppliers on 27 May, following MEC for Health and Wellness Faith Mazibuko’s recent acknowledgement that approximately R8 billion is owed to suppliers.

SAMED’s latest member data shows that R245 517 666.12 is owed to 27 medical technology suppliers, with a significant portion overdue well beyond the public sector’s 30-day payment requirement. Many affected suppliers are South African SMEs now operating under severe financial strain, forced to absorb the consequences of systemic procurement and payment failures while continuing to supply essential medical devices, diagnostics, consumables, and other critical technologies needed for patient care.

While SAMED welcomes the Department’s willingness to engage directly with suppliers, the association stresses that these discussions must lead to concrete commitments and operational action.

For SAMED and its members, this crisis is not new.

The association has spent more than a decade raising concerns about systemic procurement dysfunction, delayed payments, weak supply chain controls, and administrative failures that continue to undermine the effective functioning of the public healthcare system.

Today, those longstanding failures have evolved into a critical risk for both the healthcare sector and the businesses that support it.

In some cases, suppliers are delivering urgently needed products to hospitals while administrative bottlenecks make timely payment structurally impossible. This is particularly acute where delayed purchase orders, including for consignment stock arrangements, create a mismatch between supply delivery and budget allocation.

Monica Lucas, SAMED Board Member said, “SAMED members have continued supporting public healthcare under extraordinary financial strain because patient care cannot simply pause. But suppliers cannot indefinitely act as the financiers of a dysfunctional system. This is no longer just a debt issue; it is a structural operational failure that requires urgent executive intervention.”

Following the Department’s engagement with service providers on 23 May, SAMED has formally written to MEC Mazibuko requesting greater transparency on the Department’s debt reduction plans, and stronger accountability across finance, supply chain management, and hospital leadership.

SAMED will participate constructively in the upcoming hospital engagements and remains committed to finding practical solutions in partnership with government.

However, the association cautions that engagement without accountability will not restore supplier confidence.

After years of repeated commitments and limited progress, the sector requires clear timelines, written commitments, and measurable implementation.

“Direct engagement with leadership is welcome, but suppliers need more than reassurance. We need transparency, accountability, and a credible plan to resolve both the immediate debt burden and the underlying operational failures that continue to create it. Without that, the risks to healthcare continuity will only deepen.” – Scott de Oliveira, SAMED Chairperson

SAMED is calling for immediate action, including:

  • Publication of a verified and transparent debt position
  • A time-bound repayment plan for outstanding supplier debt
  • Executive oversight of hospital procurement and payment failures
  • Improved responsiveness from finance and supply chain leadership
  • Structured follow-up engagements with measurable progress reporting

SAMED remains committed to constructive engagement but warns that the public healthcare system cannot continue relying on suppliers to absorb systemic dysfunction indefinitely.

This week’s engagements must mark the beginning of real corrective action, not another cycle of discussion.

Categories : Emergency Medicine Injury & TraumaLeave a comment

Whole Blood and Components Equally Effective in Prehospital Trauma Care

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Photo by Mat Napo on Unsplash

Giving whole blood or the component parts of blood are equally effective options for paramedics and emergency medical technicians to use in treating patients with severe, traumatic bleeding before arriving at the hospital, according to a large, nationwide trial directed by University of Pittsburgh and UPMC clinicians and scientists.  

The results, published in the New England Journal of Medicine, provide flexibility to prehospital emergency care providers and could increase the odds that traumatically injured patients receive blood as soon as possible.  

“Traumatic bleeding is the leading cause of trauma death and is the most time-sensitive injury a person could suffer æ more time sensitive than a stroke or heart attack,” said co-lead author Jason Sperry,  professor of surgery in Pitt’s School of Medicine, and chief of trauma surgery at UPMC. “But it is preventable – and that starts with giving blood back to the injured person before they even arrive at the hospital.”  

Donated blood is usually separated into parts – red cells, plasma and platelets – for storage and so the parts can be used individually as needed. When someone is bleeding, emergency clinicians will often give all or some of these parts to the patient at once. Giving either whole blood or its component parts had long been considered safe options. 

But which is better for treating severe bleeding: Giving never-separated whole blood or giving the components? The answer matters for blood bank and emergency care logistics.  

Sperry and fellow principal investigators Francis Guyette, professor of emergency medicine in Pitt’s School of Medicine, and Stephen Wisniewski, professor of epidemiology and associate vice chancellor for clinical trials coordination at Pitt, launched the “Type O Whole Blood and Assessment of Age During Prehospital Resuscitation (TOWAR) Trial” to find out.  

The multicentre trial, which ran from May 2022 to June 2025, enrolled and included 1020 severely bleeding patients who were transferred to a trauma centre by medical helicopter. The patients were randomised 2-to-1 to receive either whole blood or blood components.   

The research team found no statistically significant difference between the two study arms. In both cases about a fifth to a quarter of the patients died within 30 days, compared to a third of traumatically bleeding patients who do not receive blood before arriving at the hospital. 

“This is good news,” said co-lead author Guyette, who is also medical director of STAT MedEvac, which is directed by a consortium of UPMC hospitals and is the nation’s largest academic, nonprofit critical care transport group. “It means that emergency responders can use whatever form of blood is most accessible to them. In U.S. civilian emergencies that may be component blood because that is how most blood banks package it, but in military settings whole blood is often all that is available. We’ve shown that both are equally great options.” 

In March, a European group announced the results of a similar, slightly smaller trial conducted in England, also published in the New England Journal of Medicine. Like the Pittsburgh team, they also found that giving whole blood or blood components was equally effective. The clinician-researchers believe that the combined findings will be reflected in guidelines set by various societies that oversee trauma care, surgery and blood handling.  

Whole blood is good for 21 days after donation, so the clinician-scientists were also curious if patient outcomes were any different if they were given new blood or blood closer to the expiration date. They learned that it made no difference—outcomes were the same for patients receiving newer blood within 14 days of donation compared to those receiving older blood within seven days of expiration. 

“Our thoughtful approach to the study design allowed us to not only answer the important question of the efficacy of whole blood compared to component therapy, but also to evaluate the health impact of an important public health question, the age of whole blood,” said senior author Wisniewski, who is also codirector of the Epidemiology Data Center at Pitt’s School of Public Health. “Our trial provides reassurance by verifying current standards that support the use of whole blood units throughout their entire shelf life.” 

The team also noted that the findings wouldn’t have been possible without the generosity of blood donors, study participants agreeing to share their data and the hard work of emergency care providers.  

“We’re very grateful to everyone involved, particularly the paramedics, emergency medical technicians and flight nurses,” Guyette said. “We are hopeful that this study and future research will give them better tools to save lives.” 

Source: University of Pittsburgh

Categories : Lab Tests and ImagingTags : Leave a comment

New ‘Quantum Glass’ Improves X-ray Resolution with Less Radiation

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A glass screen that moulds to the patient could allow more comfortable mammograms

The inside of this memory card (left) is viewed in an X-ray image (right) captured with a new resolution-boosting glass screen. Credit: Adapted from ACS Energy Letters 2026, DOI: 10.1021/acsenergylett.6c00958

X-rays allow professionals to diagnose injuries or ailments and peer inside suitcases at the airport, along with a variety of other applications. A team reporting in ACS Energy Letters has improved the glass screen that “translates” between X-rays and visible light, creating an X-ray system that produces high-resolution images with less radiation – it even works underwater. The screen can be moulded into curved shapes, a feature that could one day lead to more comfortable mammograms. 

“Because our glass screens are highly efficient at converting X-rays into visible light, they can capture diagnostic images using less radiation.”

Osman Bakr. corresponding author of the paper

A screen made of glass, called a scintillator, catches X-rays that pass through an object and converts them into flashes of visible light, explains Osman Bakr, one of the paper’s corresponding authors. “The more efficient the scintillator is at this conversion, the clearer the final digital image becomes and the lower the dose of radiation required to create it,” he adds. 

To improve the efficiency of glass-based scintillators, Bakr, Mehmet Bayindir and colleagues combined nanoclusters of copper, iodine, and an organic ligand into the glass. Then they formed their new glass into screens and captured X-ray images of a memory card and a bug, revealing intricate details within. 

“By designing these materials from the bottom up, we’ve created a ‘quantum glass’ that occupies the perfect sweet spot between molecules and nanocrystals,” explains Bayindir. Bashir Hasanov, the first author of this study, adds that “this allows the screen to be as moldable as plastic while maintaining the high-performance imaging capabilities of a rigid crystal, opening a new frontier for three-dimensional X-ray diagnostics using curved surfaces.” 

The presence of water typically makes X-ray imaging extremely challenging. However, the new, highly efficient scintillator captured a very clear scan of a fish’s tail in water. In fact, the image was indistinguishable from an image taken in air. 

Another property of the new nanocluster glass is that when heated to 42 degrees Celsius, it becomes almost rubbery, allowing the researchers to form a curved screen. This could allow future researchers to create X-ray imaging systems that curve to fit a person’s anatomy – a major drawback of current mammography machines, which require breast tissue to be compressed between flat panels for a proper scan. 

“We hope to mitigate the physical discomfort of life-saving screenings like mammography, encouraging more consistent patient participation,” says Bakr. “Because our glass screens are highly efficient at converting X-rays into visible light, they can capture diagnostic images using less radiation.” The researchers anticipate that the advances in this work could pave the way for safer, more frequent screenings that can start earlier, helping to catch cancer at an earlier stage.

Source: EurekAlert!