Assays and technologies
for circulating cell - free DNA analysis continue to improve and advance, but there is still much to do before these can be used for routine clinical use.
Not exact matches
Chicago, GenomeWeb — A new study by researchers from Memorial Sloan Kettering Cancer Center has demonstrated the predictive power of an AR - V7 protein expression test using Epic Sciences» non-EPCAM-based
circulating tumor
cell detection platform, which could help guide treatment decisions
for men with metastatic castration - resistant prostate cancer.
Currently marketed
for research use by Biofluidica, the test's microfluidic channels use specific cancer antibodies to detect capture
circulating tumor
cells.
«This phase III trial will be noteworthy
for being the first prostate cancer trial to assess a biomarker, namely AR - V7 in
circulating tumour
cells, as a predictor of response at the same time as testing the efficacy of the drug,» Prof Taplin will conclude.
This suggests that the presence of AR - V7 in
circulating tumour
cells does not preclude response to galeterone as has been shown to be the case
for abiraterone and enzalutamide.»
When similar analysis was performed on the db mice, it was found that the disrupted db gene was responsible
for encoding a protein that functions as a leptin receptor: When it binds
circulating leptin at the
cell surface, it sets in motion a biochemical cascade inside the
cell.
While many researchers are still developing affinity - based techniques
for isolating
circulating tumor
cells, others are exploiting the physical differences between normal and tumor
cells.
A research team at the University of California, Riverside has discovered a way
for chemotherapy drug paclitaxel to target migrating, or
circulating, cancer
cells, which are responsible
for the development of tumor metastases.
For investigators studying
circulating tumor
cells, the next step after sampling is to isolate the desired
cells as quickly and gently as possible.
«
Circulating tumor
cells have the advantage that they are... intact living
cells,» says Michael Kazinski, senior director and head of global product management
for sample technologies at Qiagen in Hilden, Germany.
Now a team of researchers in China has developed a new microfluidic chip that can quickly and efficiently segregate and capture live
circulating tumor
cells (CTCs) from a patient's blood, with potential applications
for cancer screenings and treatment assessments.
«We wanted to utilize platelets» intrinsic tendencies to accumulate at wounds and to interact with
circulating tumor
cells,
for targeted delivery of immune checkpoint inhibitors» said Gu, «Interestingly, we found the antibody can be promoted to release from activated platelets in the surgical site, due to generation of small platelet - derived microparticles upon the platelet activation.
In previous studies, the same group along with others had demonstrated that microRNAs (miRNAs) produced by eukaryotic
cells and viruses are present in human blood in highly stable,
cell - free forms and these so called
circulating miRNAs can serve as non-invasive biomarkers
for the early diagnosis of various diseases, including viral diseases.
Adds Liu: «With metastatic cancers accounting
for around 90 % of deaths from solid tumors, the hope is that one day a device that can enable the analysis of single tumor
cells circulating in the blood could make a big difference in early diagnosis, detection and monitoring of numerous types of cancer, without invasive biopsies.»
Liu's «lab on a chip» is notable
for its ability to not only capture tumor
cells circulating in the blood, but to «release» those
cells as well.
For example, cancer
cells floated above denser blood
cells, which could allow clinicians to spot rare
circulating tumor
cells in a patient sample.
Dor's own group reports this week that its technique
for tracing the origin of
circulating DNA detected the expected type of
cell death in people with pancreatic cancer, type 1 diabetes, multiple sclerosis, and brain injuries.
The investigators found even larger reductions in the so - called progenitor
cells circulating in the blood of a smaller number of laborers chosen
for further study.
The role of rebiopsy and repeat analysis in the setting of post-treatment relapse, along with testing of blood samples
for mutations in
circulating tumor
cells,
cell free tumor DNA, or exosomes will be considered.
For many other diseases that boost tissue - specific
cell death,
circulating DNA had little to offer.
The open structure also allows room
for the egg
cells to mature and ovulate, as well as blood vessels to form within the implant enabling the hormones to
circulate within the mouse bloodstream and trigger lactation after giving birth.
«This technology allows
for the labeling of just one
circulating pathological
cell among billions of other normal blood
cells by ultrafast changing color of photosensitive proteins inside the
cell in response to laser light,» explains Dr. Galanzha.
An impermeable shield of endothelial
cells that protects our brains from toxins and other threats that may lurk in
circulating blood, the barrier can also exclude therapeutic drugs and, at times, essential biomolecules required
for healthy brain development.
Now, a new approach developed by Dr. Ekaterina Galanzha of the University of Arkansas
for Medical Sciences in Little Rock and her colleagues allows
for labeling and tracking of individual
circulating cancer
cells throughout the body, thereby helping researchers elucidate the pathways of single
cells from start to finish.
Researchers have
for the first time developed a technique that coats anticancer drugs in membranes made from a patient's own platelets, allowing the drugs to last longer in the body and attack both primary cancer tumors and the
circulating tumor
cells that can cause a cancer to metastasize.
«These immature myeloid
cells appear as a main source of
circulating suPAR,» says Jochen Reiser, MD, PhD, principal investigator and senior author of the study presented in Nature Medicine, who has been working on solving the mysteries of suPAR
for more than a decade.
Different types of tumors show a preference
for specific organs and tissues;
circulating breast cancer
cells,
for example, are likely to take root in bones, lungs, and the brain.
That makes telomere length particularly important
for the
cells of our immune system, especially the white blood
cells circulating in our bloodstream.
The prognosis
for metastatic cancer (also called stage IV cancer) is generally poor, so a technique that could detect these
circulating tumor
cells before they have a chance to form new colonies of tumors at distant sites could greatly increase a patient's survival odds.
The
cells then produce more of what the genes code
for: cytokines, which are messenger molecules that
circulate in the blood and activate immune
cells.
T
cells, which
circulate in the blood, are an obvious candidate
for medical applications of the technology, as these
cells not only stand at the center of many disease processes, but could be easily gathered from patients, edited with CRISPR / Cas9, then returned to the body to exert therapeutic effects.
Berkeley researchers isolated
circulating tumor
cells from the blood of breast cancer patients, then used microscale physics to design a precision test
for protein biomarkers, which are indicators of cancer.
So my field is science and technology, so my work is
circulating tumor
cells where I isolate cancer
cells from blood of patients and isolate their DNA and RNA and try to sequence them and try to device treatments
for cancer treatment and therapy.
Houston Methodist researchers led by Dario Marchetti, PhD, have developed a blood test that can identify
circulating tumor
cells to predict breast cancer patients at risk
for developing brain metastasis.
«
Circulating tumor
cells —
cells from a tumor that have escaped into the bloodstream with the potential to spread into other tissues — are extremely useful
for assessing a patient's disease in order to select the most appropriate treatment,» said UBC mechanical engineering professor Hongshen Ma, the lead researcher.
Working with Boise State biology professor Cheryl Jorcyk, he is looking
for ways to put antibodies on the surface of the liposome, allowing them to recognize and attack cancer
cells that are
circulating in the body.
The Berkeley researchers then analyzed each
circulating tumor
cell for the specific panel of cancer proteins.
The technique, described in Biomaterials, uses gold nanoparticles and Raman scattering, a technology previously developed by Qian and Nie
for cancer
cell detection (2007 Nature Biotech paper, 2011 Cancer Research paper on
circulating tumor
cells).
By integrating the sequence data and the associated metadata, we have established laboratory and bioinformatics - based methods that enable us to investigate scientific questions including: the tropism of ZIKV
for dendritic
cells and the antiviral response of the
cells during infection (Bowen et al. 2017); investigating the phylogenetic diversity of strains obtained by Biodefense and Emerging Infections (BEI) Resources and distributed to virologists (manuscript in preparation); the genetic determinants of ZIKV host adaptation in C6 / 36 mosquito vs. Vero
cells; and the diversity of ZIKV
circulating in limited geographic regions, including Barbados, Colombia, and the state of Chiapas, Mexico.
Circulating cell - free DNA (cfDNA) isolated from plasma or serum by noninvasive procedures can serve as a «liquid biopsy» and has potential as a biomarker
for the tumor burden and survival prediction of breast cancer (BC).
UQ's Australian Institute
for Bioengineering and Nanotechnology (AIBN) PhD student Jing Wang says the simple nanotechnology looked at changes in
circulating tumor
cells, which could indicate whether a cancer is attempting to spread and reveal its response to treatment.
In this study, we have developed a new sensitive and specific one step rRT - PCR
for detection of ZIKV in serum and
cell culture supernatants using a Taqman probe containing locked nucleotides, in the NS5 region of ZIKV genome using sequences of ZIKV strains
circulating in Africa and Asia.
Professor Dive's exhibit was designed to introduce visitors to the concept of
circulating tumour
cells (CTCs) and how liquid biopsies could hold the key
for better diagnosis and treatment of lung cancer.
DENVER — Three manuscripts published in the recent issue of the Journal of Thoracic Oncology, the official journal of the International Association
for the Study of Lung Cancer (IASLC), explored the versatility of liquid biopsies by identifying EGFR mutations using
circulating tumor DNA (ctDNA) in urine and plasma and examining
circulating tumor
cells (CTCs) in plasma to predict the risk of lung cancer recurrence after surgical resection.
Blood Biomarkers Identified in Drug - Resistant Cancer Tumor
Cells November 2016 While searching for a non-invasive way to detect prostate cancer cells circulating in blood, Duke Cancer Institute researchers have identified some blood markers associated wi
Cells November 2016 While searching
for a non-invasive way to detect prostate cancer
cells circulating in blood, Duke Cancer Institute researchers have identified some blood markers associated wi
cells circulating in blood, Duke Cancer Institute researchers have identified some blood markers associated with...
Methods
for detecting tumor
cells and DNA
circulating in bodily fluids are currently under intense investigation
for early detection and cancer diagnostics; however, no existing technology meets the high sensitivity and specificity requirements needed to attain these goals.
A technique already developed by Dr. Simeone's research team, in collaboration with Dr. Sunitha Nagrath,
for isolating
circulating tumor
cells was the foundation
for this novel approach to personalized therapeutics.
Oncologists have suspected
for several decades that metastasis usually requires a transition between sticky epithelial
cells, which make up the bulk of solid tumors, and thinner, more mobile mesenchymal
cells that are often found
circulating solo in cancer patients» bloodstreams.
For example, Elaine Hsiao, a biologist at the University of California, Los Angeles, recently observed that microbes in a healthy colon drive intestinal
cells to produce the neurotransmitter serotonin, which then
circulates in the blood.
Analysis of
circulating cell - free DNA (cfDNA) reveals reversion mutation heterogeneity not discernable from a single solid - tumor biopsy and potentially allows monitoring
for the emergence of PARPi resistance.