Researchers have discovered a correlation between El Niño events and stalagmite growth in Belize, revealing changes in the carbon cycle of the overlying rainforest ecosystem. The findings suggest that stalagmites may record important information about weather and carbon fluxes on interannual time scales.
Researchers have identified a subset of genes in Pseudomonas aeruginosa that behave differently when the bacteria exists as a biofilm. These findings may lead to the development of new therapies targeting antibiotic resistance in biofilms. The study found that certain genes were repressed or activated in response to antibiotic treatmen...
Researchers found that aggressive melanoma cells leave behind a molecular track in the extracellular matrix that contains information and cues. These cues can cause less aggressive tumor cells to become more aggressive when they interact with the same matrix.
A search for lightning on Venus in 1998 and 1999 using the Cassini spacecraft failed to detect high-frequency radio waves commonly associated with lightning. Donald Gurnett, a space physicist at the University of Iowa, suggests that if lightning exists on Venus, it may be extremely rare or very different from terrestrial lightning.
University of Iowa researchers found that long-term treatment with verapamil can prevent heart muscle damage in mice without serious side effects. They also identified a specific biomarker, cardiac troponin I, to detect early diagnosis of cardiomyopathy in patients with muscular dystrophy.
Researchers have identified a region in the right prefrontal cortex that can rapidly distinguish emotional information from visual stimuli. This finding suggests that neurons in this area can modulate visual information processing and may play a crucial role in responding to potentially threatening or dangerous stimuli.
Researchers at the University of Iowa have discovered that perforin and interferon gamma regulate the initial immune response and residual protective immunity. These molecules control T cell generation, survival, and differentiation, allowing for a precise balance between responding to pathogens and exhausting the immune system.
A University of Iowa study found that individuals who test negative for Huntington disease often experience doubts and guilt rather than relief. They struggle to redefine their goals and purpose in life after learning they don't carry the gene mutation.
University of Iowa researchers have identified a protein, brain sodium channel 1 (BNC1), that plays a role in the perception of light touch in mice. The discovery provides an important first step towards understanding the molecular basis for this process.
Cystic fibrosis patients' lungs are infected primarily with bacterial biofilms, which are resistant to antibiotic treatment and cause damage to the lungs. A new test developed by University of Iowa researchers shows that Pseudomonas aeruginosa produces signaling molecules indicative of a biofilm state.
UI researchers find that a simple sugar, xylitol, can enhance the natural defense system of the body, potentially preventing deadly bacterial infections in CF lungs. The study shows that xylitol lowers the salt concentration of the airway surface liquid, favoring antimicrobial agents and killing invading bacteria.
University of Iowa researchers found that injecting angioblasts, precursor cells for endothelial cells, accelerates blood flow restoration in diabetic mice. This breakthrough has implications for treating diabetes-related circulatory problems and improving limb health.
A UI-led study found that flavopiridol, a cancer treatment, blocks HIV-1 replication in cell culture experiments at very low concentrations. This suggests the drug may have anti-HIV properties and could be a potential treatment for AIDS.
The University of Iowa's contribution to the Cluster 2 space mission will analyze plasma waves in Earth's magnetosphere, predicting space weather events. The US experiment will also enable a unique telescope-like system for studying low-frequency radio emissions.
A University of Iowa researcher and his colleague confirm the validity of scientific theories on ancient marine life by testing library-based databases. They found that up to 70% of entries are inaccurate but randomly distributed, not introducing bias into patterns.
Researchers solved the 'nug30' problem, a test of computer capabilities that challenged computer scientists for 32 years, by designing an efficient algorithm and leveraging high-performance computing resources. The solution demonstrates advancements in combinatorial optimization problems and their applications in real-world fields.
A recent study involving nearly 3,700 Gulf War-era veterans from Iowa found evidence of multiple symptoms, including joint pain, fatigue, and headaches, but no definitive 'Gulf War syndrome'. The researchers suggest that these health problems may be due to common medical conditions rather than a unique disorder.
Researchers have made the first direct observations of magnetic reconnection, a switch that allows energy to be transferred between solar wind and Earth. The phenomenon is responsible for aurora borealis, aurora australis, and occasional radio and satellite disruptions.
Researchers at the University of Iowa discovered a link between genetic mutations in the TLR4 gene and differences in human response to inhaled endotoxin. The study found that individuals with specific mutations were less responsive to endotoxin, but may be more susceptible to blood-borne infections.
A University of Iowa biologist is studying the application of new acoustic technologies to manage gas production and potentially eliminate odors in large-scale pork production facilities. The goal is to reduce environmental impact and improve nutrient value of hog manure used in fertilizer.
A recent UI study found that long-term exposure to radon in the home is associated with an increased risk of lung cancer. The study, which included 1,027 Iowa women, found that close to 60% of homes exceeded the EPA's action level for radon, leading to a significant increase in lung cancer risk.
Recent UI studies found that frequent marijuana users have substantially lower blood flow to certain parts of their brains, indicating altered brain function. However, smoking the illicit drug does not affect brain size or structure, contradicting previous claims.
Researchers at University of Iowa have found that a specific gene vector, AAV5, can effectively reach many brain sites following a single injection. The study suggests that AAV5-based vectors could be used to deliver correct copies of genes to cells throughout the central nervous system without multiple injections.
Researchers found that aberrant cytosine methylation and chromatin condensation can silence maspin gene expression, allowing tumors to grow and spread. The discovery provides critical information on the regulatory mechanisms of maspin, paving the way for potential cancer therapies.
A study published in Annals of Internal Medicine found that diphenhydramine, a commonly used antihistamine, impairs driving performance more significantly than alcohol. Fexofenadine, on the other hand, had minimal impact on driving skills.
Researchers found that tricyclic antidepressant nortriptyline is more effective in treating post-stroke depression than selective serotonin re-uptake inhibitors (SSRIs). The study, conducted at the University of Iowa, compared nortriptyline with fluoxetine and a placebo in 104 patients within six months of their strokes.
A University of Iowa researcher has found that ion channels in the kidney play a critical role in regulating blood pressure and that a hormone called vasopressin stimulates these channels to increase sodium absorption, leading to hypertension. The study provides new insights into Liddle's syndrome, a rare genetic form of hypertension.
A recent search using an Arizona-based telescope failed to detect evidence supporting a 13-year-old theory that small comets composed of snow continually bombard the Earth. The researchers found no conclusive evidence for small comets weighing 20-40 tons each, which were predicted to disintegrate in the atmosphere every minute.
A team of UI researchers has advanced understanding of how gene therapy might effectively treat cystic fibrosis by addressing two fundamental problems: inefficient gene transfer and lack of gene persistence. They demonstrated efficient and lasting gene transfer into airway cells using a new vector from the retrovirus family, feline imm...
A recent University of Iowa Health Care study calls into question the reliability of a classification system used to evaluate treatment outcomes in children with Legg-Calve-Perthes Disease. The Stulberg Classification System, developed in 1981, predicts long-term patient outcomes but has poor reliability among surgeons.
A University of Iowa research team found a novel approach to enhance binding between vectors and cells, making gene transfers up to 10 times more efficient. The breakthrough could lead to better methods for treating diseases like cystic fibrosis.
Researchers identified a critical two-week window for surgical decompression to improve facial function in patients at risk of permanent damage. Electrical testing and EMG analysis helped pinpoint the optimal patient population, revealing a 91% recovery rate through surgery within this timeframe.
A University of Iowa research team discovered that DNA methylation can contribute to oral cancer by silencing tumor suppressor genes. The study found that aberrant cytosine methylation patterns were present in oral cancer cells but not in normal human cells, suggesting a potential mechanism for cancer progression.
Scientists have found a possible way to induce new blood vessels without gene therapy, by lowering an individual's heart rate, according to a University of Iowa Health Care study.
A study published in the Journal of Comparative Neurology found that moderate fetal alcohol exposure can cause the corpus callosum to be larger than normal, contradicting previous research. This could have significant implications for our understanding of fetal alcohol syndrome and its effects on brain development.
A University of Iowa-led study found that women with Stage I breast cancer who did not receive axillary node dissections had significantly worse 10-year survival rates compared to those who underwent the procedure. The analysis suggests that many women with early-stage disease are not receiving this crucial treatment, which may impact ...
The University of Iowa team will use a low-frequency radar to probe beneath the Martian surface and study the planet's ionosphere. The goal is to detect signs of liquid water, which may be responsible for carving the planet's canyons.
A University of Iowa study reveals that high salt concentrations in the airways of people with cystic fibrosis prevent antimicrobial peptides from working effectively. This finding provides new ideas about potential treatments for the disease.
A recent University of Iowa Health Care study found that genetic factors and sex differences significantly affect human responses to endotoxin, with women more likely to experience declined airway function. The study examined 72 individuals without respiratory conditions and discovered a wide range of reactions to the contaminant.
Researchers found aggressive cancer cells generate their own vascular networks, potentially changing how cancers are treated. The discovery may lead to new non-invasive imaging tests and targeted therapies.
A University of Iowa research team has identified two new genes linked to the invasive and metastatic spread of breast cancer. The findings, published in Breast Cancer Research and Treatment, provide important new insights into the complex process of tumor cell invasion and metastasis.
Researchers at the University of Iowa have identified a complex domino effect that causes cardiomyopathy in limb-girdle muscular dystrophy (LGMD). The study suggests that drug therapy targeting vascular smooth muscle could prevent or stabilize cardiomyopathy in some cases of LGMD.
Researchers aim to understand the physics of auto airbags to design futuristic airbags with enhanced safety features. Preliminary findings suggest two modifications that could improve airbag safety, including reducing propellant use and installing an aspirator behind the dashboard.
Scientists at the University of Iowa have discovered a powerful tool to activate human dendritic cells, key players in the immune system, using CpG DNA. This breakthrough could lead to enhanced immunization and treatment of cancer and autoimmune diseases.
UI researchers found that restoring E-cadherin protein hinders prostate cancer spread and enhances cell adhesion. The study provides a potential new approach to target invasive prostate cancer.
The University of Iowa is conducting a space shuttle experiment to study human cell growth and metabolism in space. The oxygen-sensing system developed by the university will be used to monitor oxygen levels and provide feedback control for optimal growth conditions.
A University of Iowa study found that nearly 70% of older Iowans received the flu vaccine, but only about half got the pneumococcal vaccine. The researchers identified factors such as age, marital status, and access to healthcare as associated with vaccination rates.
Researchers developed a new test to identify reading difficulties caused by brain injuries, which passed with high sensitivity compared to existing assessments. The Iowa-Chapman Reading Test can detect even subtle reading problems in patients who have trouble reading despite passing other standard tests.
Researchers from the University of Iowa have identified a feedback loop mechanism that could explain the prolonged nature of migraines. The discovery reveals that inflammatory agents released during a migraine stimulate certain neurons to increase calcitonin gene-related peptides (CGRP) secretion, leading to persistent pain.
Researchers at the University of Iowa report improved survival rates for women with stage IV breast cancer using a four-drug, high-dose chemotherapy treatment followed by a bone marrow transplant. The study found an overall survival rate of 38 percent, compared to projected rates of 32-30 percent in other studies.