Breaking News
November 17, 2018 - Tracking Preemies’ Head Size May Yield IQ Clues
November 17, 2018 - Scientists call for unified standards in 3-D genome and epigenetic data
November 17, 2018 - Lab Innovations 2018 has beaten all records by attracting 3,113 attendees
November 17, 2018 - Sexuality education before age 18 may reduce risk of sexual assault in college
November 17, 2018 - Lab Innovations 2018 confirmed as a major hit with visitors, exhibitors and speakers
November 17, 2018 - Largest parasitic worm genetic study hatches novel treatment possibilities
November 17, 2018 - Obesity significantly increases risk of Type 2 diabetes and coronary artery disease
November 17, 2018 - People with rare cancers can benefit from genomic profiling, shows research
November 17, 2018 - NIH awards over $1.8 million to husband-and-wife doctors to test new breast cancer approach
November 17, 2018 - Four-in-one antibody used to fight flu shows promise in mice
November 17, 2018 - New approach allows pathogens to be starved by blocking important enzymes
November 17, 2018 - Higher body mass index could cause depression even without health problems
November 17, 2018 - Protein which plays role in sensing cell damage serves as new target to treat pulmonary hypertension
November 17, 2018 - FDA Approves Adcetris (brentuximab vedotin) in Combination with Chemotherapy for Adults with Previously Untreated Systemic Anaplastic Large Cell Lymphoma or Other CD30-Expressing Peripheral T-Cell Lymphomas
November 17, 2018 - ID specialist input improves outcomes for outpatient parenteral antimicrobial therapy
November 17, 2018 - UT Southwestern scientists selected to receive 2019 Edith and Peter O’Donnell Awards
November 17, 2018 - New clinical algorithm to help individuals manage type 2 diabetes when fasting during Ramadan
November 17, 2018 - Researchers identify LZTR1 as evolutionarily conserved component of RAS pathway
November 17, 2018 - Heart Disease Leading Cause of Death in Low-Income Counties
November 17, 2018 - Estrogen Levels Test: MedlinePlus Lab Test Information
November 17, 2018 - Research reveals link between immunity, diabetes
November 17, 2018 - Research shows how to achieve improved smoking cessation outcomes within California’s Medicaid population
November 17, 2018 - New study finds less understanding and implementation of patient engagement
November 17, 2018 - New shoe insole technology could help diabetic ulcers heal better while walking
November 17, 2018 - New method to extend cell division and immortalization of avian-derived cells
November 17, 2018 - Australian Academy of Science urges parents to vaccinate children against meningococcal disease
November 17, 2018 - Hot water treatment may help improve inflammation and metabolism in sedentary people
November 17, 2018 - Researchers produce 3D chemical maps of small biological samples
November 17, 2018 - Must Blood Pressure Rise Wth Age? Remote Tribes Hold Clues
November 17, 2018 - Noonan Syndrome
November 17, 2018 - Interventions to delay and prevent type 2 diabetes are underused, researchers say
November 17, 2018 - Hackathon prize winner seeks to remotely monitor patient skin conditions
November 17, 2018 - Research team identifies Ashkenazi Jewish founder mutation for Leigh syndrome
November 17, 2018 - Gene editing could be used to halt kidney disease in patients with Joubert syndrome
November 17, 2018 - Study uncovers link between gut disruption and aging
November 17, 2018 - Teens more likely to pick up smoking after exposure from friends and family
November 17, 2018 - Nicoya designate the Institute for Stem Cell Biology and Regenerative Medicine as the OpenSPR Centre of Excellence
November 17, 2018 - new horizon in dental, oral and craniofacial research
November 17, 2018 - How does poor air quality affect your health?
November 17, 2018 - New device can regulate children’s blood glucose more like natural pancreas
November 17, 2018 - Game-Changers in Western Blotting and Protein Analysis
November 17, 2018 - FDA announces new actions to limit sale of e-cigarettes to youth
November 17, 2018 - Warmer winter temperatures related to higher crime rates
November 17, 2018 - MCO places increasing emphasis on helping people find and access healthy food
November 17, 2018 - Group of students aim to improve malaria diagnosis using old smartphones
November 17, 2018 - Transplantation of feces may protect preterm children from deadly bowel disease
November 17, 2018 - Researchers explore whether low-gluten diets can be recommended for people without allergies
November 17, 2018 - New and better marker for assessing patients after cardiac arrest
November 17, 2018 - For 7-year-old with failing bone marrow, a life-saving transplant | News Center
November 17, 2018 - New first-line treatment for peripheral T-cell lymphoma approved by FDA
November 17, 2018 - Artificial intelligence could be valuable tool to help young victims disclose traumatic testimony
November 17, 2018 - Breakthrough in the treatment of Restless Legs Syndrome
November 16, 2018 - FDA Approves Keytruda (pembrolizumab) for the Treatment of Patients with Hepatocellular Carcinoma (HCC) Who Have Been Previously Treated with Sorafenib
November 16, 2018 - Eagle Books | Native Diabetes Wellness Program
November 16, 2018 - Patients with common heart failure more likely to have lethal heart rhythms
November 16, 2018 - How AI could help veterinarians code their notes | News Center
November 16, 2018 - Bias-based bullying does more harm to students than generalized bullying
November 16, 2018 - Researchers find first direct evidence that cerebellum plays role in cognitive functions
November 16, 2018 - Non-coding genetic variant plays key role in endothelial function and disease incidence
November 16, 2018 - EMA recommends first all-oral treatment to tackle deadly sleeping sickness
November 16, 2018 - Drug used to treat dizziness may slow down growth of triple-negative breast cancer
November 16, 2018 - AHA: Icosapent Ethyl Cuts CV Risk From Elevated Triglycerides
November 16, 2018 - ‘Orphan’ RNAs make cancer deadlier, but potentially easier to diagnose
November 16, 2018 - Air Cube touches down at hospital | News Center
November 16, 2018 - CRISPR-based tool shown to enhance cell-based immunotherapy
November 16, 2018 - Mechanisms that govern HIV latency differ in the gut and blood, finds study
November 16, 2018 - Researchers unravel mystery of NPM1 protein in acute myeloid leukemia
November 16, 2018 - High school students less likely to select milk, fruit for lunch when fruit juice is available
November 16, 2018 - Football coaches with great emotional competence are more successful
November 16, 2018 - Researchers awarded $10 million grant to address root causes of asthma in Puerto Rico
November 16, 2018 - Personalized scheduling of radiotherapy using genetic data could reduce side effects
November 16, 2018 - American Cancer Society study links social isolation to higher mortality risk
November 16, 2018 - Health Tip: Manage Morning Sickness
November 16, 2018 - Long term exposure to road traffic noise linked with greater obesity risk
November 16, 2018 - Infant gut microbes altered by mother’s obesity may increase risk for future disease
November 16, 2018 - Immunotherapy combination and chemotherapy show encouraging results in Phase II acute myeloid leukemia study
November 16, 2018 - ACC Latin America Conference brings experts to discuss latest cardiovascular science
November 16, 2018 - Pooled analysis of Intersect ENT’s steroid releasing implants in patients after frontal sinus surgery to be published
November 16, 2018 - Expectations about pain intensity can become self-fulfilling prophecies
November 16, 2018 - NIH awards $3.4 million to UC researchers to study gastrointestinal lymphatic system
Carbon nanodots mimic the effect of ultrafine pollution particles on lung tissues

Carbon nanodots mimic the effect of ultrafine pollution particles on lung tissues

image_pdfDownload PDFimage_print

Epidemiological studies have established a strong correlation between inhaling ultrafine particles from incomplete combustion and respiratory and cardiovascular diseases. Still, relatively little is known about the mechanisms behind how air particulates affect human health. New work with carbon nanodots seeks to provide the first model of how ultrafine carbon-based particles interact with the lung tissues.

An international group of researchers created a 3D lung cell model system to investigate how carbon-based combustion byproducts behave as they interact with human epithelial tissue. In Biointerphases, an AVS journal from AIP Publishing, the investigators discovered that the surface properties of the carbon nanodot’s properties and aggregation patterns affected their distribution in a lab-grown copy of the lung’s barrier layer, the epithelium. The carbon nanodots served as representatives for air pollution particles.

“Localization and quantification of inhaled carbon nanoparticles at the cellular level has been very difficult,” said Barbara Rothen-Rutishauser, an author on the paper, which is part of a special focus issue of the journal Biointerphases on Women in Biointerface Science. “We now have a model fluorescent particle that can try to answer questions about the fate of ultrafine particles in the lung.”

At less than 100 nanometers in diameter, ultrafine particles have the small size and large relative surface area to wreak havoc on cells and potentially enter the bloodstream. Other groups’ research has shown that ultrafine particles induce adverse effects on the lungs and cardiovascular system by increasing oxidative stress in the body.

Because of particle size, it is difficult for lab techniques to distinguish between carbon in pollutants from carbon in tissues. Therefore, little is known about surface charge and states of agglomeration, two key physical and chemical features that affect how carbon particles interact with living tissues.

To begin modeling ultrafine particles, Estelle Durantie, another author of the study, turned to fluorescent carbon nanodots doped with nitrogen and a combination of nitrogen and sulfur with different sizes and charges. The team then applied these nanodots to the top layer of a lab-grown epithelial tissue, where gas exchange typically happens in the lung.

Since regular fluorescent microscopes lack the resolution to visualize such small particles, the group used spectroscopy and UV light to detect and quantify nanodots as they migrated from the luminal compartment past their lung model’s immune cells. As the researchers expected, charged particles tended to stick together before penetrating the gas-exchange barrier. While most of the neutrally charged nanodots passed through the tissue after only an hour, only 20 percent of the agglomerated charged particles infiltrated the epithelium.

Rothen-Rutishauser said she hopes to further improve nanodots so that they better mimic ultrafine particles. “What we’re seeing is that translocation depends on aggregation state,” Rothen-Rutishauser said. “We hope to continue trying out different sizes of nanodots, including other types of particles that get us closer to the real environment.” ​

Source:

https://publishing.aip.org/publishing/journal-highlights/carbon-nanodots-do-ultrafine-job-vitro-lung-tissue

Tagged with:

About author

Related Articles