Breaking News
December 10, 2018 - Australian researchers to study gas inhalational anaesthetic and likelihood of cancer return
December 10, 2018 - Individual neurons located within the brain have implications for psychiatric diseases
December 10, 2018 - Researchers improve bariatric surgery scoring system to extend prediction time for diabetic remission
December 10, 2018 - Combo therapy not needed if low RA disease activity achieved
December 10, 2018 - UC San Diego professor receives NCI Outstanding Investigator Award for cancer research
December 10, 2018 - Study evaluates placental mesenchymal stem cell sheets for myocardial repair and regeneration
December 10, 2018 - Blueprint Medicines Announces Updated Results from Ongoing EXPLORER Clinical Trial of Avapritinib Demonstrating Broad Clinical Activity and Significant Symptom Reductions in Patients with Systemic Mastocytosis
December 10, 2018 - Study clarifies ApoE4’s role in dementia
December 10, 2018 - Eating disorders now a top priority with Australian Government
December 10, 2018 - Neuronal activity in the brain allows prediction of risky or safe decisions
December 10, 2018 - FDA Alerts Health Care Professionals and Patients Not to Use Drug Products Intended to be Sterile from Promise Pharmacy
December 10, 2018 - Improving dementia care and treatment saves thousands of pounds in care homes
December 10, 2018 - Heroin-assisted treatment can offer benefits, reduce harms
December 10, 2018 - People covered by Michigan’s expanded Medicaid program report improvements in health, finds study
December 10, 2018 - Hazelnuts improve micronutrient levels in older adults
December 9, 2018 - History of Partner Violence Tied to Menopause Symptoms
December 9, 2018 - Clean Up Safely After a Disaster|Natural Disasters and Severe Weather
December 9, 2018 - Drug wholesalers drove fentanyl’s deadly rise, report concludes
December 9, 2018 - Deprescribing could help manage polypharmacy in older adults
December 9, 2018 - Retraction of article “Joy of cooking too much” from journal
December 9, 2018 - FDA Warns of Rare Stroke Risk With MS Drug Lemtrada (Alemtuzumab)
December 9, 2018 - Feds say heroin, fentanyl remain biggest drug threat to US
December 9, 2018 - Eliminating microglia can reverse some aspects of stress sensitization, study shows
December 9, 2018 - New genetic insight could help treat rare debilitating heart and lung condition
December 9, 2018 - MiRagen Therapeutics Announces Final Safety, Biodistribution and Clinical Efficacy Data From Phase 1 Cobomarsen Clinical Trial in Patients With Mycosis Fungoides
December 9, 2018 - Work with your doctor to weigh pros, cons of treatment options for hyperthyroidism
December 9, 2018 - CWRU researcher secures $14.6 million funding for genetic study into Alzheimer’s disease
December 9, 2018 - High intensity statin treatment and adherence could save more lives
December 9, 2018 - Surgery patients use only 1/4 of prescribed opioids, and prescription size matters
December 9, 2018 - AXT offers Phi Optics upgrade to QPI systems for inverted light microscopes
December 9, 2018 - New booklet could help improve conditions of young pupils with albinism
December 9, 2018 - Few Physicians Work in Practices That Use Telemedicine
December 9, 2018 - Older Adults and Oral Health
December 9, 2018 - Health utility values improve after septorhinoplasty
December 9, 2018 - New EU-funded project provides insight into how the brain develops
December 9, 2018 - Expanded use of tele-emergency services can help strengthen rural hospitals
December 9, 2018 - Infections in the Young May Be Tied to Risk for Mental Illness: Study
December 9, 2018 - Profile: Native Hawaiians and Pacific Islanders
December 9, 2018 - Snoring poses greater cardiac risk to women
December 9, 2018 - Researcher takes further steps in understanding how and why cute aggression occurs
December 9, 2018 - Researchers create new light-activated tools for controlling neurons
December 9, 2018 - Spinal cord injury disrupts the body’s internal clock, study shows
December 9, 2018 - Babies recognize nested structures similar to our grammar
December 9, 2018 - UT Austin researcher receives $2.5 million CZI grant for neurodegenerative disease research
December 9, 2018 - Sleep problems found to be prevalent and increasing among college students
December 9, 2018 - Study reveals why some children are susceptible to the effects of maltreatment
December 9, 2018 - Study investigates influence of different opioids on driving performance
December 9, 2018 - Jazz Pharmaceuticals Announces First Patient Enrolled in Phase 3 Clinical Trial Evaluating JZP-258 for the Treatment of Idiopathic Hypersomnia
December 9, 2018 - Eliminating microglia prevents heightened immune sensitivity after stress
December 9, 2018 - Boys with social difficulties are at greatest risk of early substance use
December 9, 2018 - ‘Wrong’ connective tissue cells linked to worse prognosis in breast cancer patients
December 8, 2018 - Chronic, refractory schizophrenia patients benefit from targeted cognitive training
December 8, 2018 - Advertising in kids’ apps more prevalent than parents may realize
December 8, 2018 - New way to trace the transmission histories of rare genetic diseases
December 8, 2018 - ASH: A+CHP Bests CHOP for Peripheral T-Cell Lymphoma
December 8, 2018 - Results of pediatric genomic epilepsy tests often reclassified
December 8, 2018 - New way of controlling HIV latency to completely eradicate the virus
December 8, 2018 - Phasefocus to showcase the Livecyte 2 at ASCB
December 8, 2018 - KHN’s ‘What the Health?’ Is health spending the next big political issue?
December 8, 2018 - Mussels take in microplastic pollution fibers and flush most of them out again
December 8, 2018 - AHA: How to Stop Smoking … for Good
December 8, 2018 - Scientists overturn odds to make Parkinson’s discovery
December 8, 2018 - Health benefits of producing marula vinegar
December 8, 2018 - Failure of critical cellular energy sensor responsible for CKD progression, study finds
December 8, 2018 - Ethnicity can be reliable indicator of gut microbiota diversity
December 8, 2018 - Safe Sleep for Baby | NIH News in Health
December 8, 2018 - Study looks at ways technology can support nutritional needs of Parkinson’s patients
December 8, 2018 - Infant milk allergy is being overdiagnosed say experts
December 8, 2018 - Graphene may one day be used to test for ALS
December 8, 2018 - Houston Methodist launches real-time website to track flu cases
December 8, 2018 - RedHill Announces Positive Top-Line Results from Confirmatory Phase 3 Study with Talicia for H. pylori Infection
December 8, 2018 - A way to measure obesity and health beyond BMI
December 8, 2018 - New diagnostic tools may help identify breast cancer patients who could benefit from targeted therapies
December 8, 2018 - Duke-NUS researchers highlight possible role of bioaerosol sampling in pandemic surveillance
December 8, 2018 - Study quantifies links between alcohol, drug use and violent deaths
December 8, 2018 - Mothers’ stress levels at conception linked to child’s response to life challenges at age 11
December 8, 2018 - MIT researchers develop antimicrobial peptides from South American wasp’s venom
December 8, 2018 - Obesity prevention among low-income, diverse preschool-aged children and parents
December 8, 2018 - Mount Sinai researcher awarded $2.5 million to advance understanding of neurodegenerative diseases
December 8, 2018 - CZI announces funding for open-source software efforts to improve image analysis in biomedicine
Engineers develop non-invasive method for detecting bladder cancer

Engineers develop non-invasive method for detecting bladder cancer

image_pdfDownload PDFimage_print

A research team led by Tufts University engineers has developed a non-invasive method for detecting bladder cancer that might make screening easier and more accurate than current invasive clinical tests involving visual inspection of bladder. In the first successful use of atomic force microscopy (AFM) for clinical diagnostic purposes, the researchers have been able to identify signature features of cancerous cells found in patients’ urine by developing a nanoscale resolution map of the cells’ surface, as reported today in the Proceedings of the National Academy of Sciences (PNAS).

Bladder cancer is one of the leading causes of cancer-related deaths in the United States, with the American Society of Clinical Oncologists estimating 17,240 deaths for 2018. While early detection leads to a five-year survival rate of 95 percent, bladder cancer detected at the metastatic stage leaves the patient with only a 10 percent chance of survival after five years. Current methods for detection involve cystoscopy (running a tube with a video camera into the bladder through the urethra), as well as possible biopsy, and pathology examination of the tissue sample. For patients who have been treated and are in remission, the recurrence rate is high – between 50 and 80 percent, so invasive cystoscopy exams must be conducted every three to six months at great expense and discomfort for patients.

“By introducing a non-invasive diagnostic method that is more accurate than the invasive visual examination, we could significantly decrease the cost and inconvenience to patients,” said Igor Sokolov, professor of mechanical engineering and biomedical engineering at Tufts University School of Engineering and lead author of the study. “All that is needed is a urine sample, and not only could we more effectively monitor patients after treatment, we could also more easily screen healthy individuals who may have a family history of the disease, and potentially detect the grade of cancer development. Determining the efficiency of early screening and grade detection is a separate, important task of our future research. “

AFM involves scanning over a surface with a very small cantilever, which is deflected from its position as it passes over the bumps and valleys on the surface. Recording the deflections allows a topographical map to be created with a resolution of fractions of a nanometer. Moreover, the deflection of the AFM cantilever is indicative of some physical properties of the sample. For example, one can measure the adhesion force between the AFM probe and the sample surface. The researchers discovered that bladder cells extracted from urine of a cancer patient have unique surface features that distinguish them from cells extracted from a healthy person, allowing the researchers to apply the method as a diagnostic tool.

The diagnostic method incorporates machine learning, enabling a more accurate recognition of the signature surface features, such as adhesion, roughness, directionality, and fractal properties, among others. The AFM-based test demonstrates more than 90 percent sensitivity in detecting bladder cancer (i.e. if a person is known to have the disease, the test will detect it 90% of the time) versus 20 to 80 percent sensitivity for currently available non-invasive diagnostics on urine samples, such as biochemical evaluation of the biomarker NMP22, genetic analysis using fluorescence in situ hybridization, or immunocytochemistry. Specificity of AFM – the accuracy of identifying individuals who do NOT have the disease – is 82-98%, which is comparable to other tests.

“AFM has been around for more than 30 years, but this is the first time it has shown promise for clinical diagnostics,” said Sokolov. “The accuracy appears to be better than the current clinical standard for bladder cancer diagnosis, but we will need to test the method on a larger cohort of patients before it can be introduced into clinical practice. We are hopeful that AFM could ultimately be applied to the detection of other tumor types, such as gastrointestinal, colorectal and cervical cancers.”

Tagged with:

About author

Related Articles