Health
Bacterial Protein Found to Trigger Cancer Cell Self-Destruction, Study Finds
A newly identified bacterial protein could hold the key to future cancer treatments, after scientists discovered it can cause tumour cells to destroy themselves. The breakthrough, led by researchers at Spain’s University of Salamanca, was published in the journal Cell Death Discovery.
The study focused on a protein called HapA, which is secreted by Vibrio cholerae — the bacterium best known for causing cholera. Researchers found that HapA can trigger programmed cell death, or apoptosis, in several types of cancer cells, including breast, colon, and pancreatic tumours.
“This work demonstrates the potential of bacterial proteins as anti-tumour therapeutic tools,” said Antonio Hurtado, the project’s lead researcher.
The team discovered that HapA targets two key receptors on the surface of tumour cells, known as PAR-1 and PAR-2. These receptors are normally associated with tumour growth, inflammation, and blood clotting. However, HapA interacts with them in a unique way — cutting them at different sites from those targeted by human enzymes. This unusual mechanism sets off a rapid chain reaction inside the cancer cells, leading to their self-destruction.
To confirm that HapA was responsible for the effect, scientists conducted experiments using mutant strains of V. cholerae that lacked the protein, as well as bacteria genetically modified to produce only HapA. In every case, tumour cells only died when HapA was present, confirming its decisive role in reducing cancer cell viability.
The researchers further tested the protein’s impact by exposing cancer cell lines from breast, colon, and pancreatic tumours to liquids containing all the proteins secreted by V. cholerae. “We wanted to see if human cells of different tumour types were still alive and could multiply after being in contact with these bacterial substances — particularly HapA,” Hurtado explained.
The findings suggest HapA’s unique ability to activate the PAR-1 and PAR-2 receptors could be harnessed to develop more targeted cancer therapies with fewer side effects. By influencing cell signalling through a different molecular pathway than human enzymes, scientists hope future treatments could selectively attack cancer cells while sparing healthy tissue.
Experts say the study highlights how bacteria — often viewed solely as harmful pathogens — can also provide valuable insights into new medical treatments. “Pathogens can reveal unexpected molecular mechanisms with significant therapeutic potential,” the researchers concluded.
While the findings are still at an early stage, the discovery opens the door to a new class of bacterial-based anti-cancer therapies — a promising frontier in oncology research.
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
AI Models Show Ability to Mimic Human Emotions, Offering New Pathways for Mental Health Research
Health
AI Saves Clinicians Weeks of Work but Health Systems Struggle to Keep Up, Philips Report Finds
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