Breaking News
March 23, 2019 - Seeing through a robot’s eyes helps those with profound motor impairments
March 23, 2019 - Recent research shows that ease of breastfeeding after C-section differs culturally
March 23, 2019 - Newly discovered parameters offer more control over efficient release of drugs
March 23, 2019 - ‘De-tabooing’ of abortion- Women would like more support from health care community
March 23, 2019 - Anti-TB drugs can increase susceptibility to Mtb reinfection
March 23, 2019 - New survey indicates need of attention to neglected tropical diseases
March 23, 2019 - Innovative in vitro method to develop easy-to-swallow medicine for children and older people
March 23, 2019 - Sugary drinks could raise risk of early deaths finds study
March 23, 2019 - Lian wins ENGINE grant for stem-cell-based therapy to treat Type 1 diabetes
March 23, 2019 - Overall, Physicians Are Happy and Enjoy Their Lives
March 23, 2019 - Researchers discover how blood vessels protect the brain during inflammation
March 23, 2019 - CDC study shows modest improvement in optimal hospital breastfeeding policy
March 23, 2019 - Family-based prevention program to reduce alcohol use among older teens
March 23, 2019 - Remote monitoring of implanted defibrillators in heart failure patients prevents hospitalizations
March 23, 2019 - Appropriate doffing of personal protective equipment may reduce healthcare worker contamination
March 23, 2019 - Window screens can suppress mosquito populations, reduce malaria in Tanzania
March 23, 2019 - Researchers discover new biomarker for postoperative liver dysfunction
March 23, 2019 - Pregnancy history may be linked to cognitive function in older women, finds study
March 23, 2019 - Study shows ticagrelor is equally safe and effective as clopidogrel after heart attack
March 23, 2019 - FDA Approves First Drug for Postpartum Depression, Zulresso (brexanolone)
March 23, 2019 - New guidelines outline new treatment management for psoriasis
March 23, 2019 - Thermally abused cooking oil may promote progression of breast cancer
March 23, 2019 - High-fructose corn syrup fuels growth of colon tumors in mice
March 23, 2019 - Partnership aims at establishing best practices to promote diversity in clinical trials
March 23, 2019 - New study examines presence of microbes in tap water from residences, office buildings
March 23, 2019 - Early life trauma may affect brain structure, contribute to major depressive disorder
March 23, 2019 - NIH starts clinical trial of drug to treat cravings associated with opioid use disorder
March 23, 2019 - Cervix bacteria, immune factors could be a warning signal of premature birth, reports new research
March 23, 2019 - Worst-ever emergency care performance figures underscore the need to focus on staffing
March 23, 2019 - The Current issue of “The view from here” is concerned with Cancer
March 23, 2019 - Mouse model validates how ‘good’ and ‘bad’ bacteria affect acne
March 23, 2019 - Individual amygdala neurons respond to touch, imagery and sounds
March 23, 2019 - Combination of two topical creams can prevent cancer
March 23, 2019 - Study suggests depression screening when assessing African-Americans for schizophrenia
March 23, 2019 - New electronic support system for choosing drug treatment based on patient’s genotype
March 23, 2019 - First-of-its-kind study provides pregnancy statistics of imprisoned U.S. women
March 23, 2019 - Marinus Pharmaceuticals Initiates Phase 3 Study in Children with PCDH19-Related Epilepsy
March 23, 2019 - Laparoscopy: MedlinePlus Lab Test Information
March 23, 2019 - Shellfish allergies: can they be treated?
March 23, 2019 - Toilet seat heart monitoring system
March 23, 2019 - Researchers identify way to improve common treatment for PTSD
March 23, 2019 - High potency cannabis use linked to psychosis finds study
March 23, 2019 - Evoke Pharma Submits Response to FDA Review Letter for Gimoti NDA
March 23, 2019 - Tracking HIV’s ever-evolving genome in effort to prioritize public health resources
March 23, 2019 - Scientists grow most sophisticated brain organoid to date
March 23, 2019 - ADHD drug raising risk of psychosis
March 22, 2019 - FDA approves brexanolone, first drug developed to treat postpartum depression
March 22, 2019 - Gruesome cat and dog experiments by the USDA exposed
March 22, 2019 - Ball pits used in children’s physical therapy may contribute to germ transmission
March 22, 2019 - Long-term use of inexpensive weight-loss drug may be safe and effective
March 22, 2019 - FDA Approves Sunosi (solriamfetol) for Excessive Daytime Sleepiness Associated with Narcolepsy or Obstructive Sleep Apnea
March 22, 2019 - Anti-Müllerian Hormone Test: MedlinePlus Lab Test Information
March 22, 2019 - Finding the right exercise, diet aids for HIV patients
March 22, 2019 - Health Plans For State Employees Use Medicare’s Hammer On Hospital Bills
March 22, 2019 - Researchers develop new tool for imaging large groups of neurons in living animals
March 22, 2019 - Certain bacteria and immune factors in vagina may cause or protect against preterm birth
March 22, 2019 - Novel breath test could pave new way to non-invasively measure gut health
March 22, 2019 - Pharmaceutical and personal care products may result in new contaminants in waterways
March 22, 2019 - New model could revolutionize the way researchers investigate spread of pathogens
March 22, 2019 - MSU professor receives NSF CAREER grant for biosensor diagnostics
March 22, 2019 - High-fat, high-sugar diet in mouse mothers causes problems in the hearts of offspring
March 22, 2019 - ACC: Catheter Ablation Does Not Cut Mortality, Stroke in A-Fib
March 22, 2019 - Wiedemann-Rautenstrauch syndrome – Genetics Home Reference
March 22, 2019 - Health insurance is not assurance of healthcare
March 22, 2019 - Supporting “curiosity-driven research” at the Discovery Innovation Awards
March 22, 2019 - Must-Reads Of The Week (Some Flying Below The Radar)
March 22, 2019 - Newly engineered nanoscale protein micelles can be tracked by MRI
March 22, 2019 - New model more effective in predicting risk of opioid overdose than traditional models
March 22, 2019 - Mayo Clinic study identifies potential new drug therapy for liver diseases
March 22, 2019 - Pitt engineers win $550,000 NSF CAREER award to develop new intervention for people with ASD
March 22, 2019 - Early discharge does not increase readmission risk for patients after lung surgery
March 22, 2019 - Creating diverse pool of trained scientists to address Alzheimer’s research needs
March 22, 2019 - Surprising discovery offers clues to limit graft-vs.-host disease
March 22, 2019 - Study shows ACA’s positive impact on healthcare affordability and access for women
March 22, 2019 - Study provides new pathway for controlling inflammation
March 22, 2019 - New combination treatment shows promise for common brain tumor in children
March 22, 2019 - Virginia Tech Helmet Lab releases first youth-specific football helmet ratings
March 22, 2019 - New algae-based treatment could reduce need for limb amputation
March 22, 2019 - Stroke risk reduces in both black and white older Medicare beneficiaries, study reports
March 22, 2019 - City of Hope exhibits current studies and data on cancer therapies at AACR
Novel microfluidic device for real-time detection of cholesterol in liver-on-chip cultures

Novel microfluidic device for real-time detection of cholesterol in liver-on-chip cultures

image_pdfDownload PDFimage_print

In a paper to be published in the September/December 2019 issue of TECHNOLOGY, a team of researchers from the Department of Biomedical Engineering at Illinois Institute of Technology, Chicago has developed a novel microfluidic device for measuring in real-time the cholesterol secreted from liver tissue-chip containing human hepatocytes. Their innovation lies not merely in the development of the first on-chip real-time assay for cholesterol detection but also in adapting the assay chemistry which is common in the conventional well-plate based enzymatic assay for cholesterol to microfluidic format and localizing it on the microscopic beads. This innovation can help researchers employing microfluidic cultures to study the effects of drugs such as statins on lowering cholesterol in real-time.

Tissue-chips are an important tool in developing drugs which treat different health conditions as well as to understand the underlying mechanisms of different tissues. However, there is a general challenge in utilizing the tissue-chips for broad applications as due to the small sample volumes, on-chip assessment of cellular function is often quite limited. Abhinav Bhushan, Ph.D., Assistant Professor at Illinois Institute of Technology (IIT), Chicago, who is the principal investigator of this research says

“Perfusion based microfluidic cell cultures produce low sample volumes which cannot be used for analysis using conventional biochemical assays. Our bead-based enzymatic assay for cholesterol measurement is the first reported assay which can quantify cholesterol secreted by human hepatocytes in real-time on-chip. This method is novel as this is the first reported use of a bead-based enzyme immobilized system in combination with visual detection for quantifying cholesterol in real-time and we envision our assay can pave way for enabling studies that use perfusion in microfluidics which produces low sample volumes.”

The bead-based enzymatic cholesterol detection system uses horseradish peroxidase that is immobilized on polystyrene beads; the entire oxidation reaction of cholesterol takes place on the bead. This oxidation reaction generates fluorescent signal by forming resorufin, making the beads appear fluorescent. Each bead can be imaged as a series of images, where the intensity of fluorescence is directly proportional to the amount of cholesterol in the sample. The simple chemistry and detection used in this assay makes the assay more adaptable to a lab setting.

“While the application of detection systems for biomolecules such as electrophoresis, mass spectroscopy, electrospray ionization, and fluorometric detection using a photomultiplier tube have been carried out in the past, this is the first time a non-protein molecule has been quantified in real-time and on-chip using immobilized enzyme beads. It’s the simplicity of the assay chemistry and its potential for adaptation that makes our microfluidic assay unique”, says Sonali Karnik, Ph.D. who is the lead author of the article.

The next step for them, the team says, is to multiplex their enzymatic assay with a different assay chemistry for simultaneous detection of multiple molecules.

Source:

https://www.worldscientific.com/page/pressroom/2019-01-10-01

Posted in: Cell Biology | Biochemistry

Tags: Assay, Cell, Cholesterol, Drugs, Electrophoresis, Enzyme, Fluorescence, Life science, Liver, Manufacturing, Microfluidics, Molecule, pH, Protein, Research, Spectroscopy

Tagged with:

About author

Related Articles