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Archive for category: E-News

E-News

Optical resonance-based biosensors designed for medical applications

, 26 August 2020/in E-News /by 3wmedia

A telecommunications engineer of the NUP/UPNA-Public University of Navarre, has designed optical resonance-based biosensors for use in medical applications like, for example, the detecting of celiac disease. Besides achieving greater resolution and sensitivity, the materials used in these devices are much cheaper and more versatile than the ones used in current technologies (mainly gold and noble metals) so they could offer a potential alternative in the design of biomedical sensors.

A biosensor is an instrument that uses biological molecules (bioreceptors) to detect other biological or chemical substances. In this thesis the bioreceptors have been antibodies, biological molecules that the body produces specifically to fight off antigens. An antigen is a substance foreign to the human body; our immune system recognises it as a threat and in the presence of it the body reacts by producing antibodies to identify and neutralise it. What is more, the biosensor is made up of a substrate (where the physical phenomenon that translates the biological reactions into intelligible information takes place) and the immobilisation layer which causes the antibodies to become attached to the substrate.

‘One of the unique features,’ says the author, ‘is that for the substrate we use silicon waveguides on which we generate a specific type of resonance.’ The biosensors designed are based on the movement of the wavelength of the resonances generated on the basis of the quantity of antigens detected. ‘When the antibodies come together with the antigens, there is a minimum change in the wavelength that our biosensors are capable of picking up.’ This is possible thanks to the resolution achieved by these biosensors and their sensitivity, ‘which enables us to see how much resonances shift on the wavelength as the antibody-antigen links increase.’

The work carried out by Abi

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Beat untreatable eczema with arthritis drug

, 26 August 2020/in E-News /by 3wmedia

Researchers at Yale School of Medicine have successfully treated patients with moderate to severe eczema using a rheumatoid arthritis drug recently shown to reverse two other disfiguring skin conditions, vitiligo and alopecia areata. The study is evidence of a potential new era in eczema treatment, they report.

Eczema (atopic dermatitis) is a chronic condition that causes severe itching and leaves the skin red and thickened. It can adversely affect sleep and quality of life. Standard treatments, such as steroid creams and oral medicines, commonly fail to relieve symptoms in patients with moderate to severe eczema.

Based on current scientific models of eczema biology, assistant professor of dermatology Dr. Brett King hypothesized that a drug approved for rheumatoid arthritis, tofacitinib citrate, would interrupt the immune response that causes eczema.

In the new study, King and his colleagues report that treatment with the drug led to dramatic improvement in six patients with moderate to severe eczema who had previously tried conventional therapies without success.

During treatment all six patients reported significant reduction in itch as well as improved sleep. The redness and thickening of the skin diminished, also.

King and fellow Yale dermatologist Dr. Brittany Craiglow had previously shown that tofacitinib citrate regrows hair in patients with an autoimmune-related form of hair loss called alopecia areata. They also published findings reporting the successful treatment of a patient with vitiligo, which can leave widespread irregular white patches all over the body.

The new study suggests that a change in the standard of care for eczema

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Newer, easier to manage medications may not always be the best choice

, 26 August 2020/in E-News /by 3wmedia

If you are over age 75, and taking an anticoagulant, the old standard may be the gold standard, Mayo Clinic researchers and collaborators have determined.

In a study a team of researchers from Mayo Clinic, and other collaborators, showed that for older patients, particularly individuals greater than 75 years of age,  the risk of gastrointestinal (GI) bleeding is 3 to 5 times higher when taking newer anticoagulant medications dabigatran or rivaroxaban compared to when using warfarin.

One of the most common reasons people take anticoagulant medication

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Carestream Health developing new 3D orthopedic imaging system for enhanced imaging of extremities

, 26 August 2020/in E-News /by 3wmedia

Carestream is partnering with leading orthopedic and sports medicine specialists to develop a new three-dimensional medical imaging system (not available for commercial sale) for capturing images of patient extremities (knees, legs, feet, arms and hands). Initial clinical studies will focus on the advantages of using cone beam CT (CBCT) technology in the diagnosis and treatment of knee injuries. This system is designed for use by orthopedic surgeons. Imaging systems based on CBCT technology for use in treating orthopedic conditions

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Daily bathing of paediatric patients with antiseptic cuts bloodstream infections

, 26 August 2020/in E-News /by 3wmedia

Daily bathing of paediatric patients with disposable cloths containing 2 percent chlorhexidine gluconate (CHG) reduced central line-associated bloodstream infections (CLABSIs) by 59 percent and saved approximately $300,000 in one hospital over a six-month period, according to a new study.

The study examined the impact of implementing a daily CHG bathing protocol for all paediatric patients at Riley Hospital for Children at Indiana University Health.

CHG is an antimicrobial that kills germs on a patient

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Researcher identifies inflammatory pathway that offers VEGF-independent target for diabetic macular edema drugs

, 26 August 2020/in E-News /by 3wmedia

Diabetic macular edema (DME) is a leading source of vision loss around the world, affecting about a fifth of people with long-term diabetes. Drugs that target a protein known as VEGF (vascular endothelial growth factor) inside the eye have greatly improved the treatment options in recent years, but only about half of DME patients are fully responsive to these new therapies.

Edward P. Feener, Ph.D., Investigator in the Section on Vascular Cell Biology and Director of the Proteomics Core at Joslin Diabetes Center and an Associate Professor of Medicine at Harvard Medical School.

Research in the lab of Edward P. Feener, Ph.D., Investigator in the Section on Vascular Cell Biology and Director of the Proteomics Core at Joslin Diabetes Center and an Associate Professor of Medicine at Harvard Medical School, now has shown that a substantial percentage of patients with DME do not have high levels of VEGF in the fluid inside their eyes but do have high levels of a protein called PKal (plasma kallikrein) and associated molecules that are key players in an inflammatory molecular pathway involved in the disease.

The scientists also have demonstrated in animals that the PKal molecular pathway can induce retinal edema through mechanisms that are independent of the VEGF pathway, which at normal levels helps to build and maintain blood vessels but at high concentrations can induce abnormal vessel growth and contribute to DME.

Outlined in a paper, the discoveries boost the evidence that agents targeting PKal eventually may be useful in treating DME that is not fully responsive to VEGF inhibitors.

In August 2014, KalVista Pharmaceuticals Ltd. launched an early phase clinical trial of a PKal inhibitor to treat DME, with Jennifer Sun, M.D., Ph.D., of Joslin

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?Natural birth? for diabetic mother

, 26 August 2020/in E-News /by 3wmedia

Norwich University Hospital has its own newborn announcement

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Miniature heart sensor keeps heart failure patients out of the hospital

, 26 August 2020/in E-News /by 3wmedia

Cardiologists at The Mount Sinai Hospital have begun implanting tiny, state-of-the-art microchip sensors in patients with advanced heart failure to better monitor symptoms and reduce their chances of returning to the hospital. 

The implantable sensor, called the CardioMEMS HF System, developed by St. Jude Medical, is a battery-less, dime-sized device placed directly inside the heart to monitor its pulmonary artery. Implanted through a minimally invasive procedure, the sensor detects increases in pulmonary artery pressure, an early sign of worsening heart failure that can be detected before symptoms arise. Among the symptoms of advanced heart failure is shortness of breath, the kind of frightening experience that sends people racing to emergency rooms.

Once implanted, the device transmits daily pressure readings to a patient’s medical team, who can then proactively provide real-time, personalised feedback before symptoms worsen. The device has been shown in clinical trials to reduce hospital readmissions for advanced heart failure patients by up to 37 percent.

The new microchip technology is designed for advanced heart failure patients who have been hospitalised within the previous 12 months. The goal of Mount Sinai’s heart failure experts is to improve the quality of life in patients with heart failure and reduce the likelihood of hospital readmissions, a growing trend for this high-risk patient population which has become a national priority for the Centers for Medicare and Medicaid Services to reduce readmissions to curb growing healthcare costs.

‘This new device will enable heart failure patients to live more comfortably, easing their worries as we closely monitor them for the earliest signs of fluid retention, a major cause of the symptoms of breathlessness and tiredness heart failure patients experience,’ says Raymond Bietry, MD, Assistant Professor of Cardiology who was the first cardiologist at Mount Sinai to implant the device. Mount Sinai Hospital

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Tattoo-like sensor can detect glucose levels without a painful finger prick

, 26 August 2020/in E-News /by 3wmedia

Scientists have developed the first ultra-thin, flexible device that sticks to skin like a rub-on tattoo and can detect a person

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A3 adenosine receptor can activate ‘off signals’ for pain

, 26 August 2020/in E-News /by 3wmedia

St. Louis University scientists led by professor of pharmacological and physiological sciences Daniela Salvemini, Ph.D., discovered that drugs targeting the A3 adenosine receptor can ‘turn off’ pain signals in the spinal cord to provide relief from chronic pain.

Pain is the most common reason that people seek medical attention, but the available treatments–most commonly non-steroidal anti-inflammatory drugs (NSAIDs) and opioids–are not always successful at relieving pain in patients with chronic pain. For this reason, Salvemini and colleagues teamed up with researchers from the National Institutes of Health, the University of Arizona and two institutes in Quebec, Canada, to investigate a new target for treating chronic pain: the A3 adenosine receptor or A3AR.

In earlier studies, Salvemini’s laboratory demonstrated that two drugs which target the A3AR–IB-MECA and MRS5698–were effective in treating several models of chronic pain, including painful chemotherapy-induced neuropathy, metastatic cancer pain, and nerve injury. More recently, the group sought to uncover the mechanism of A3AR pain relief.

‘Chronic pain can result from the loss of regulatory mechanisms in the nervous system pathway that transmits pain,’ Salvemini said. ‘Adenosine acts as a regulatory signalling molecule in other areas of the nervous system, so we hypothesized that A3AR might also play a role in regulating pain signals during pain processing.’

Indeed, Salvemini and colleagues found that A3AR drugs not only relieved pain, but did so by activating an inhibitory transmitter system known as the gamma amino-butyric acid (GABA) system. In areas of the spinal cord and brain dedicated to pain processing, A3AR activation promoted GABA signalling by preventing the breakdown and removal of GABA from neuronal synapses.

‘In chronic pain, GABA signalling is often lost or diminished. Our A3AR drugs were able to restore GABA signalling in areas that process pain and ‘turn off’ the signals that maintain the pain state,’ Salvemini said.

With A3AR drugs demonstrating good safety profiles in clinical trials as anti-inflammatory and anti-cancer agents, Salvemini and colleagues are enthusiastic about the potential of these new drugs to treat chronic pain in patients. EurekAlert

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