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Cell free tumour DNA

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https://www.readbyqxmd.com/read/29759151/circulating-tumour-dna-for-detecting-minimal-residual-disease-in-multiple-myeloma
#1
REVIEW
Trevor J Pugh
Circulating tumor DNA faithfully recapitulates somatic mutations detected in bone marrow aspirates from patients with newly diagnosed or relapsed or recurrent myeloma. Extending these methods to enable detection of minimal residual disease will require increased sensitivity and breadth of genomic assays to maximize information content from small quantities of cell-free DNA; as well as definition of a clinically meaningful ctDNA concentration in comparison with conventional bone marrow cell-count thresholds...
January 2018: Seminars in Hematology
https://www.readbyqxmd.com/read/29700392/ephb6-augments-both-development-and-drug-sensitivity-of-triple-negative-breast-cancer-tumours
#2
Behzad M Toosi, Amr El Zawily, Luke Truitt, Matthew Shannon, Odette Allonby, Mohan Babu, John DeCoteau, Darrell Mousseau, Mohsin Ali, Tanya Freywald, Amanda Gall, Frederick S Vizeacoumar, Morgan W Kirzinger, C Ronald Geyer, Deborah H Anderson, TaeHyung Kim, Alana L Welm, Peter Siegel, Franco J Vizeacoumar, Anthony Kusalik, Andrew Freywald
Triple-negative breast cancer (TNBC) tumours that lack expression of oestrogen, and progesterone receptors, and do not overexpress the HER2 receptor represent the most aggressive breast cancer subtype, which is characterised by the resistance to therapy in frequently relapsing tumours and a high rate of patient mortality. This is likely due to the resistance of slowly proliferating tumour-initiating cells (TICs), and understanding molecular mechanisms that control TICs behaviour is crucial for the development of effective therapeutic approaches...
April 27, 2018: Oncogene
https://www.readbyqxmd.com/read/29684744/the-role-of-circulating-tumour-cells-and-nucleic-acids-in-blood-for-the-detection-of-bladder-cancer-a-systematic-review
#3
REVIEW
Pramit Khetrapal, Matthew Wei Liang Lee, Wei Shen Tan, Liqin Dong, Patricia de Winter, Andrew Feber, John D Kelly
BACKGROUND: Blood-based biomarkers are a neglected resource in bladder cancer, where the mainstay of focus has been on urinary biomarkers. However, blood-based biomarkers are gaining popularity in other solid cancers, particularly circulating tumour cells (CTCs) and circulating nucleic acids. In this systematic review, we identify and discuss the diagnostic value of CTC, cell-free DNA and RNA based biomarkers in bladder cancer. METHODS: A MEDLINE/Pubmed systematic search was performed using the following keywords: (bladder cancer) AND (blood OR plasma OR serum) AND biomarker AND (DNA OR RNA OR cfDNA OR cell-free DNA OR RNA OR CTC)...
April 17, 2018: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29658031/fully-automated-on-site-isolation-of-cfdna-from-whole-blood-for-cancer-therapy-monitoring
#4
Chi-Ju Kim, Juhee Park, Vijaya Sunkara, Tae-Hyeong Kim, Yongjin Lee, Kyusang Lee, Mi-Hyun Kim, Yoon-Kyoung Cho
The potential utility of circulating tumour DNA (ctDNA) in patient blood for cancer diagnostics and real-time monitoring of disease progression is highly recognized. However, the lack of automated and efficient methods for cell-free DNA (cfDNA) isolation from peripheral blood has remained a challenge for broader acceptance of liquid biopsy in general clinical settings. Here, we demonstrate a lab-on-a-disc system equipped with newly developed, electromagnetically actuated, and reversible diaphragm valves that allows fully automated and rapid (<30 min) isolation of cfDNA from whole blood (>3 ml) to achieve high detection sensitivity by minimizing the degradation of fragile ctDNA as well as contamination of wild-type DNA from abundant blood cells...
May 1, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29625863/circulating-cell-free-dna-for-non-invasive-cancer-management
#5
REVIEW
Caitlin M Stewart, Dana W Y Tsui
Cell-free DNA (cfDNA) was first identified in human plasma in 1948 and is thought to be released from cells throughout the body into the circulatory system. In cancer, a portion of the cfDNA originates from tumour cells, referred to as circulating-tumour DNA (ctDNA), and can contain mutations corresponding to the patient's tumour, for instance specific TP53 alleles. Profiling of cfDNA has recently become an area of increasing clinical relevance in oncology, in particular due to advances in the sensitivity of molecular biology techniques and development of next generation sequencing technologies, as this allows tumour mutations to be identified and tracked non-invasively...
March 11, 2018: Cancer Genetics
https://www.readbyqxmd.com/read/29615461/molecular-diagnosis-of-diffuse-gliomas-through-sequencing-of-cell-free-circulating-tumour-dna-from-cerebrospinal-fluid
#6
Francisco Martínez-Ricarte, Regina Mayor, Elena Martínez-Sáez, Carlota Rubio-Pérez, Estela Pineda, Esteban Cordero, Marta Cicuéndez, Maria A Poca, Nuria Lopez-Bigas, Santiago Ramón Y Cajal, María Vieito, Joan Carles, Josep Tabernero, Ana Vivancos, Soledad Gallego, Francesc Graus, Juan Sahuquillo, Joan Seoane
PURPOSE: Diffuse gliomas are the most common primary tumour of the brain and include different subtypes with diverse prognosis. The genomic characterization of diffuse gliomas facilitates their molecular diagnosis. The anatomical localization of diffuse gliomas complicates access to tumour specimens for diagnosis, in some cases incurring high-risk surgical procedures and stereotactic biopsies. Recently, cell-free circulating tumour DNA (ctDNA) has been identified in the cerebrospinal fluid (CSF) of patients with brain malignancies...
April 3, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29610456/potential-of-quantitative-sept9-and-shox2-methylation-in-plasmatic-circulating-cell-free-dna-as-auxiliary-staging-parameter-in-colorectal-cancer-a-prospective-observational-cohort-study
#7
Julia Bergheim, Alexander Semaan, Heidrun Gevensleben, Susanne Groening, Andreas Knoblich, Jörn Dietrich, Julia Weber, Jörg C Kalff, Friedrich Bootz, Glen Kristiansen, Dimo Dietrich
BACKGROUND: Septin 9 (SEPT9) and short stature homeobox 2 (SHOX2) methylation in circulating cell-free DNA (ccfDNA) are powerful biomarkers for colorectal cancer (CRC) screening, as well as head and neck squamous cell carcinoma staging and monitoring. In the present study, we investigated SEPT9 and SHOX2 ccfDNA methylation as auxiliary pre and post-therapeutic staging parameters in CRC patients. METHODS: ccfDNA methylation was quantified in 184 prospectively enrolled patients prior to and 3-10 days after surgery, and biomarker levels were associated with clinico-pathological parameters...
April 3, 2018: British Journal of Cancer
https://www.readbyqxmd.com/read/29597259/the-role-of-circulating-free-dna-and-microrna-in-non-invasive-diagnosis-of-hbv-and-hcv-related-hepatocellular-carcinoma
#8
REVIEW
Francesca Pezzuto, Luigi Buonaguro, Franco Maria Buonaguro, Maria Lina Tornesello
Hepatocellular carcinoma (HCC) is the third and the fifth leading cause of cancer related death worldwide in men and in women, respectively. HCC generally has a poor prognosis, with a very low 5-year overall survival, due to delayed diagnosis and treatment. Early tumour detection and timely intervention are the best strategies to reduce morbidity and mortality in HCC patients. Histological evaluation of liver biopsies is the gold standard for cancer diagnosis, although it is an invasive, time-consuming and expensive procedure...
March 28, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29594214/sdf-1-cxcr4-expression-in-head-and-neck-cancer-and-outcome-after-postoperative-radiochemotherapy
#9
Chiara De-Colle, David Mönnich, Stefan Welz, Simon Boeke, Bence Sipos, Falko Fend, Paul-Stefan Mauz, Inge Tinhofer, Volker Budach, Jehad Abu Jawad, Martin Stuschke, Panagiotis Balermpas, Claus Rödel, Anca-Ligia Grosu, Amir Abdollahi, Jürgen Debus, Christine Bayer, Claus Belka, Steffi Pigorsch, Stephanie E Combs, Fabian Lohaus, Annett Linge, Mechthild Krause, Michael Baumann, Daniel Zips, Apostolos Menegakis
Introduction: Outcome after postoperative radiochemotherapy (RT-CT) for patients with advanced head and neck squamous cell carcinomas (HNSCC) remains unsatisfactory, especially among those with HPV negative tumours. Therefore, new biomarkers are needed to further define subgroups for individualised therapeutic approaches. Preclinical and first clinical observations showed that the chemokine receptor CXCR4 and its ligand SDF-1 (CXCL12) play an important role in tumour cell proliferation, survival, cancer progression, metastasis and treatment resistance...
August 2017: Clinical and translational radiation oncology
https://www.readbyqxmd.com/read/29569084/screening-organometallic-thiophene-containing-thiosemicarbazone-ruthenium-ii-iii-complexes-as-potential-anti-tumour-agents
#10
Zehra Tavsan, Pelin Köse Yaman, Elif Subasi, Hulya Ayar Kayali
The new ruthenium (III) complex has been synthesized and characterized by elemental analysis, FT-IR, UV-Vis, EI-Mass, EPR spectroscopy, and magnetic susceptibility measurement. Cytotoxic effects of organoruthenium (II/III) complexes 1a, 1b, and 2a, and their ligands (TSC1 and TSC2 ) in cultured human ovarian (A2780, SKOV-3, and OVCAR-3) and colon (DLD, CCD18Co, and Caco-2) cells have been investigated comparing reactivity of the Ru (II/III) complexes and their free TSC ligands. The complexes exhibit higher cytotoxicity in three cancer cell lines than in normal cells...
March 22, 2018: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/29568377/molecular-profiling-of-aldh1-colorectal-cancer-stem-cells-reveals-preferential-activation-of-mapk-fak-and-oxidative-stress-pro-survival-signalling-pathways
#11
Radhakrishnan Vishnubalaji, Muthurangan Manikandan, Mohamed Fahad, Rimi Hamam, Musaad Alfayez, Moustapha Kassem, Abdullah Aldahmash, Nehad M Alajez
Tumour heterogeneity leads to variable clinical response and inaccurate diagnostic and prognostic assessment. Cancer stem cells (CSCs) represent a subpopulation responsible for invasion, metastasis, therapeutic resistance, and recurrence in many human cancer types. However, the true identity of colorectal cancer (CRC) SCs remains elusive. Here, we aimed to characterize and define the gene expression portrait of CSCs in CRC-model SW403 cells. We found that ALDH+ positive cells are clonogenic and highly proliferative; their global gene expression profiling-based molecular signature revealed gene enrichment related to DNA damage, MAPK, FAK, oxidative stress response, and Wnt signalling...
March 2, 2018: Oncotarget
https://www.readbyqxmd.com/read/29535826/circulating-tumour-derived-dna-in-metastatic-soft-tissue-sarcoma
#12
Nicholas C Eastley, Barbara Ottolini, Rita Neumann, Jin-Li Luo, Robert K Hastings, Imran Khan, David A Moore, Claire P Esler, Jacqueline A Shaw, Nicola J Royle, Robert U Ashford
Following treatment 40% of soft tissue sarcoma (STS) patients suffer disease recurrence. In certain cancers circulating cell free DNA (cfDNA) and circulating tumour-derived DNA (ctDNA) characteristics correlate closely with disease burden, making them exciting potential sources of biomarkers. Despite this, the circulating nucleic acid characteristics of only 2 STS patients have been reported to date. To address this we used an Ion AmpliSeq™ panel custom specifically designed for STS patients to conduct a genetic characterisation of plasma cfDNA, buffy coat (germline) DNA and where available Formalin-Fixed Paraffin-Embedded (FFPE) primary STS tissue DNA in a cohort of 11 metastatic STS patients...
February 13, 2018: Oncotarget
https://www.readbyqxmd.com/read/29529957/circulating-cell-free-dna-does-not-harbour-a-diagnostic-benefit-in-cats-with-feline-diffuse-iris-melanomas
#13
Jessica G Rushton, Reinhard Ertl, Dieter Klein, Alexander Tichy, Barbara Nell
Objectives Feline diffuse iris melanoma (FDIM) is the most common malignant primary intraocular tumour in cats, with reported metastases rates between 19% and 63%. Currently, the only available diagnostic tool for a tentative diagnosis is histopathological examination of the enucleated eye. Therefore, the veterinary ophthalmologist is often faced with the dilemma of whether to enucleate an oftentimes visual eye or to continue monitoring, with the risk of metastases developing. In the past, cell-free DNA (cfDNA) gained more attention in human medicine, especially in the field of oncology...
March 1, 2018: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/29500065/plasma-cell-free-dna-concentration-and-outcomes-from-taxane-therapy-in-metastatic-castration-resistant-prostate-cancer-from-two-phase-iii-trials-firstana-and-proselica
#14
Niven Mehra, David Dolling, Semini Sumanasuriya, Rossitza Christova, Lorna Pope, Suzanne Carreira, George Seed, Wei Yuan, Jane Goodall, Emma Hall, Penny Flohr, Gunther Boysen, Diletta Bianchini, Oliver Sartor, Mario A Eisenberger, Karim Fizazi, Stephane Oudard, Mustapha Chadjaa, Sandrine Macé, Johann S de Bono
BACKGROUND: Noninvasive biomarkers are needed to guide metastatic castration-resistant prostate cancer (mCRPC) treatment. OBJECTIVE: To clinically qualify baseline and on-treatment cell-free DNA (cfDNA) concentrations as biomarkers of patient outcome following taxane chemotherapy. DESIGN, SETTING, AND PARTICIPANTS: Blood for cfDNA analyses was prospectively collected from 571 mCRPC patients participating in two phase III clinical trials, FIRSTANA (NCT01308567) and PROSELICA (NCT01308580)...
February 28, 2018: European Urology
https://www.readbyqxmd.com/read/29478030/immunohistochemical-evaluation-of-stress-responsive-protein-sestrin2-and-its-correlation-with-p53-mutational-status-in-eyelid-sebaceous-gland-carcinoma
#15
Perumal Jayaraj, Seema Sen, Srishti Rangarajan, Neelanjana Ray, Kirtana Vasu, Vijay Kumar Singh, Rajendra Phartyal, Sarika Yadav, Anita Verma
BACKGROUND: p53 is a stress-activated tumour suppressor gene, and its mutation has been associated with solid tumours including non-melanoma skin cancers. Sestrin2 expression is associated with DNA damage and oxidative stress and has been described as a downstream target of p53 network. However, its role in sebaceous gland carcinoma (SGC) remains unexplored. OBJECTIVES: To determine the role of p53 and its downstream target gene sestrin2 expression and p53 gene mutation status in SGC...
February 24, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29464111/circulating-cell-free-plasma-tumour-dna-shows-a-higher-incidence-of-egfr-mutations-in-patients-with-extrathoracic-disease-progression
#16
Yoshitaka Seki, Yutaka Fujiwara, Takashi Kohno, Kazushi Yoshida, Yasushi Goto, Hidehito Horinouchi, Shintaro Kanda, Hiroshi Nokihara, Noboru Yamamoto, Kazuyoshi Kuwano, Yuichiro Ohe
No abstract text is available yet for this article.
2018: ESMO Open
https://www.readbyqxmd.com/read/29458792/circulating-tumour-dna-a-promising-biomarker-for-the-management-of-colorectal-cancer
#17
REVIEW
Shelize Khakoo, Alexandros Georgiou, Marco Gerlinger, David Cunningham, Naureen Starling
Circulating cell free tumour DNA (ctDNA) maintains the same genomic alterations that are present in the corresponding tumour, thereby allowing for quantitative and qualitative real-time evaluation in body fluids as an alternative to onerous repeat biopsies. Improvements in the sensitivity of techniques used to identify ctDNA has led to a surge of research investigating its role in the detection of: early disease, relapse, response to therapy and emerging drug resistance mechanisms. Following curative surgery, ctDNA detection is a promising marker of minimal residual disease and could better select patients for adjuvant chemotherapy...
February 2018: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/29415479/telomere-length-dynamics-and-the-evolution-of-cancer-genome-architecture
#18
REVIEW
Kez Cleal, Kevin Norris, Duncan Baird
Telomeres are progressively eroded during repeated rounds of cell division due to the end replication problem but also undergo additional more substantial stochastic shortening events. In most cases, shortened telomeres induce a cell-cycle arrest or trigger apoptosis, although for those cells that bypass such signals during tumour progression, a critical length threshold is reached at which telomere dysfunction may ensue. Dysfunction of the telomere nucleoprotein complex can expose free chromosome ends to the DNA double-strand break (DSB) repair machinery, leading to telomere fusion with both telomeric and non-telomeric loci...
February 6, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29400102/-in-vivo-analysis-of-circulating-cell-free-dna-release-and-degradation
#19
Barbara Kinga Barták, Zsófia Brigitta Nagy, Sándor Spisák, Zsolt Tulassay, Magdolna Dank, Péter Igaz, Béla Molnár
INTRODUCTION: Cell-free DNA (cfDNA) was first detected in human plasma in the 1940s, but the knowledge on its regulation and rate of release is incomplete. CfDNA can originate from both normal and tumour cells. AIM: Our aims were to investigate the rate of cfDNA's release in SHO mice/HT-29 colorectal adenocarcinoma cell line xenograft model and to define the decay of methylated and non-methylated DNA fragments in C57BL/6 bloodstream. METHOD: SHO mice were xenografted with human HT-29 cells, than blood samples were collected over 2 months...
February 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29380875/the-value-of-cell-free-dna-for-molecular-pathology
#20
REVIEW
Caitlin M Stewart, Prachi D Kothari, Florent Mouliere, Richard Mair, Saira Somnay, Ryma Benayed, Ahmet Zehir, Britta Weigelt, Sarah-Jane Dawson, Maria E Arcila, Michael F Berger, Dana Wy Tsui
Over the past decade, advances in molecular biology and genomics techniques have revolutionized the diagnosis and treatment of cancer. The technological advances in tissue profiling have also been applied to the study of cell-free nucleic acids, an area of increasing interest for molecular pathology. Cell-free nucleic acids are released from tumour cells into the surrounding body fluids and can be assayed non-invasively. The repertoire of genomic alterations in circulating tumour DNA (ctDNA) is reflective of both primary tumours and distant metastatic sites, and ctDNA can be sampled multiple times, thereby overcoming the limitations of the analysis of single biopsies...
April 2018: Journal of Pathology
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