Researchers have successfully transplanted cryopreserved human neuronal cells into rats with stroke, restoring movement and behavioral recovery. The treatment has shown promise as an alternative to fetal tissue in treating strokes and neurodegenerative disorders.
Researchers at the University of Pennsylvania School of Medicine are studying how cells sense, respond, and adapt to physical forces. They aim to develop interventional drugs, gene-therapies, and blood-clot-dissolving enzymes for diseased vessels.
Researchers discovered that a genetic translocation between chromosomes is responsible for the deadly uncontrolled cell growth in APL. The hormone retinoic acid plays a crucial role in regulating gene expression and overcoming this translocation, making it a promising treatment for most cases.
Genetic testing offers disease predisposition insights but also poses risk of discrimination and invasion of privacy if not properly regulated. Dr. Arthur L. Caplan warns that a lack of universal healthcare coverage and inadequate protections hinder the benefits of genetic screening.
Dr. Glenn McGee presents a regulatory model to ensure the welfare of cloned children, drawing from adoption and divorce laws. He highlights concerns about physical safety and potential damage to family relationships, emphasizing the need for checks and balances in cloning.
Dr. Arthur L. Caplan argues that human cloning poses significant moral and ethical dilemmas, including the safety of the procedure, social implications, and emotional toll on clones. Despite advancements in technology, Caplan emphasizes the need to address these issues before pursuing human cloning.
A new clinical approach combining echocardiograms with troponin T levels significantly increases diagnostic accuracy for chest pain, predicting hospital admissions and cardiac events. This method has the potential to reduce unnecessary hospitalizations and improve patient outcomes.
Researchers have developed a gene therapy technique that makes recipient's immune system tolerant of newly engrafted organs, eliminating the need for lifelong immunosuppressive drug therapy. The approach involves introducing a vector carrying the CTLA4Ig protein into an organ preservation solution before transplant surgery.
Researchers at the University of Pennsylvania School of Medicine are conducting a new clinical trial combining a proven antiretroviral drug therapy with an experimental DNA vaccine to eradicate HIV. The therapy has shown promise in lowering virus levels and restoring immune system function, paving the way for a potential cure.
A recent study by Daniel S. Kessler found that activation of siamois, a homeobox gene, is required for the formation of Spemann's organizer in frogs. The siamois gene is turned on by Wnt proteins and activates organizer genes, crucial for embryonic development.
Researchers used a novel test to measure damaging activity of free radicals in body tissues, finding high levels in atherosclerotic plaque tissue. The technique provides a real handle on oxidant processes in atherogenesis and could lead to clinical studies testing efficacy of drugs limiting free-radical damage.
Researchers created P-cadherin-deficient mice to investigate the function of P-cadherin in controlling mammary tissue growth. The study found that P-cadherin plays a crucial role in maintaining undifferentiated breast tissue, and its absence leads to hyperproliferation.
A nationwide review of managed-care companies' gatekeeping practices found nearly one-third of patients denied emergency medical care suffered adverse outcomes. The study highlights the need for in-person medical assessments, as telephone gatekeeping failed to reliably distinguish between safe and unsafe cases.
Researchers discover that dopamine levels can enhance or impair working memory, with a low dose of the drug bromocriptine improving scores in low-capacity subjects but worsening performance in high-capacity individuals. The study suggests an optimal level of dopamine for short-term memory to function properly.
Researchers have developed a novel gene-therapy strategy to target HIV-infected cells using the virus's molecular tools against it. The technique, which employs therapeutic genes only in infected cells, has broad applicability and could potentially cure HIV infection.
Researchers at the University of Pennsylvania Medical Center found that chronic exposure to nicotine stimulates and permanently inactivates two prominent subtypes of acetylcholine receptors, leading to tolerance. Habitual users become dependent on nicotine through neural reward pathways similar to other addictive drugs.
A new Fetal Echocardiography website aims to improve detection of congenital heart disease using an expert system that guides physicians and technicians in interpreting fetal sonograms. The beta version of the program has been accessed over 7,000 times since its online launch in August 1996.
Researchers have developed an electronic 'nose' that can detect the presence of pulmonary infection in patients with high accuracy. The device uses breath samples analyzed by multi-element odor detectors to identify unique patterns on a computer screen, distinguishing infected patients from non-infected ones.
Researchers have discovered how a rare epilepsy mutation works at a molecular level, potentially helping understand other nervous-system disorders. The mutation impairs signaling between nerve cells, leading to seizures in people with autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE).
Researchers have discovered a small peptide called ALX40-4C that blocks the CXCR4 coreceptor used by HIV-1 to infect T cells. This breakthrough suggests a potential new generation of combination therapies that could delay or prevent HIV infection and AIDS progression.
Researchers at the University of Pennsylvania Medical Center have devised a unique procedure to transform monocytes into battle-ready dendritic cells, boosting the immune system's cancer-fighting forces. The modified cells have shown ability to activate T cells within one week.
Researchers found that HIV gene vpr blocks cytokine production in infected cells, preventing immune activation. Vpr also prevents apoptosis in infected cells but induces apoptosis in neighboring immune cells, making it harder for the body to defend against the infection. The antisteroid compound RU-486 reversed many of these effects.
Researchers at the University of Pennsylvania School of Medicine have identified a novel death-receptor gene called KILLER/DR5 that responds to chemotherapy and radiation by killing cancer cells. The discovery provides new insights into how cancer cells are killed after treatment, with potential implications for improving cancer therapy.
Researchers at the University of Pennsylvania have discovered a novel biochemical mechanism for carbon monoxide poisoning that may lead to new clinical approaches. The study reveals that CO binds to heme proteins, usurping nitric oxide and leading to tissue-damaging oxidants and free radicals.
Researchers at the University of Pennsylvania School of Medicine have identified a molecular target of action for BRCA1, which induces the cell cycle inhibitor p21. This finding suggests potential strategies for treating breast and ovarian cancers, including screening drug compounds to activate p21.
A team of researchers at the University of Pennsylvania School of Medicine has determined the molecular structure of Cre recombinase, an enzyme used in genetically engineering animal models. The detailed structural picture will aid in designing better research models and provide insights into the recombination reaction.
Researchers from the University of Pennsylvania Medical Center investigated the role of cytokines in treating heart disease. Amlodipine, a widely prescribed medication for patients with heart failure, was found to lower plasma levels of interleukin-6 (IL-6) in heart patients over a period of 26 weeks.
Scientists have discovered a common mechanism underlying neurodegenerative diseases, where mutant proteins accumulate in nuclear spaces, recruiting normal proteins and disrupting cellular processes. This finding suggests a single disease mechanism may be responsible for several afflictions.
A study published in the Journal of Neurosurgery found a significant link between smoking and cerebral blood-vessel damage. Smokers are nearly five times more likely to develop vasospasm, a violent constriction of arterial walls that can lead to stroke-like symptoms.
A mathematical model explains the scientific basis of radical heart surgery, potentially selecting suitable candidates for therapeutic removal of large heart muscle portions. The Batista procedure aims to improve cardiac function by reducing heart size and stress.
University of Pennsylvania researchers discover three-dimensional atomic structure of vancomycin using X-ray diffraction analysis. The advance provides detailed knowledge about the vancomycin molecule to help design new antibiotics effective against vancomycin-resistant bacteria.
A study by the University of Pennsylvania School of Medicine found that postmortem sperm procurement requests are increasing, with over half made between 1994 and 1995. Most requests were from wives seeking to create children for their deceased husbands.
Researchers discovered a genetic mutation in people with Alport syndrome prevents normal transformation process in collagen proteins, leading to gradual loss of membrane integrity. The mutation affects production of alpha-5 collagen, resulting in breakdown of critical glomerular basement membrane.
A study by Penn researchers found that minor depression in elderly populations is linked to differences in brain structure, specifically smaller prefrontal lobe volume. This finding has important neurobiologic implications for minor depression and may inform the development of new treatments.
A new DNA vaccine has shown promising results in protecting chimpanzees from HIV-1 infection, with two immunized animals demonstrating a strong immune response and one controlled animal showing signs of infection before recovery. The vaccine's genetic approach may lead to breakthroughs in human disease treatment.
Researchers at the University of Pennsylvania School of Medicine have discovered a new antibody that targets the CXCR4 receptor, a molecule involved in HIV infection. The antibody, termed 12G5, has been shown to block some types of HIV from infecting cells and has enormous value for HIV investigators.
A new technology has been developed to address the need for Rh immune globulin, a treatment for pregnant women with Rh-Factor Incompatibility. The approach uses phage display to isolate anti-Rh antibodies from whole cells, offering a promising solution to this long-standing problem.
Researchers studying sea lamprey nerve regeneration found that fibers grow in the correct direction and create synapses with target cells, restoring function. The discovery led to hypotheses about a new mechanism of neurofilament transport pushing forward growth cones.
A recent study by the University of Pennsylvania School of Medicine found that black women have lower resting metabolic rates than white women, making it harder to lose weight. This difference in metabolism was observed even after adjusting for weight and muscle mass.
New research suggests that Lewy bodies may entrap life-sustaining cellular organelles, leading to neuronal death in diseases such as Parkinson's and ALS. The study provides a potential strategy for developing treatments by targeting the formation or elimination of Lewy bodies.
Researchers at the University of Pennsylvania School of Medicine discovered that nerve growth factor induces cell death in some childhood brain tumor cells. The findings suggest a potential new treatment approach for these cancers, expanding scientists' understanding of NGF's role in development.
Researchers studied genetic mutations in patients with congenital lipoid adrenal hyperplasia, a devastating disorder affecting steroid hormone production. The study revealed that StAR protein plays a central role in steroid hormone synthesis, with mutant proteins blocking cholesterol conversion and causing cellular damage.
A new study has identified a common functional problem in enlarged heart disease that causes sudden death in athletes, regardless of the genetic cause. This finding suggests that a single therapeutic approach may be effective for all victims of hypertrophic cardiomyopathy (HCM), a leading cause of sudden death in young adults.