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https://www.readbyqxmd.com/read/29792706/adaptable-detection-strategies-in-membrane-based-immunoassays-calibration-free-quantitation-with-surface-enhanced-raman-scattering-readout
#1
Aleksander Skuratovsky, Robert J Soto, Marc D Porter
This paper presents a method for immunometric biomarker quantitation that uses standard flow-through assay reagents and obviates the need for constructing a calibration curve. The approach relies on a nitrocellulose immunoassay substrate with multiple physical addresses for analyte capture, each modified with different amounts of an analyte-specific capture antibody. As such, each address generates a distinctly different readout signal that is proportional to the analyte concentration in the sample. To establish the feasibility of this concept, equations derived from antibody-antigen binding equilibrium were first applied in modeling experiments...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29792094/regulatory-context-and-validation-of-assays-for-clinical-mass-spectrometry-proteomics-cmsp-methods
#2
Christophe Hirtz, Pauline Bros, Cato Brede, Pierre Lescuyer, Aleksandra M Maceski, Jerome Vialaret, Vincent Delatour, Sylvain Lehmann
Clinical mass spectrometry proteomics (cMSP) assays are being increasingly used in clinical laboratories for analyzing peptides and proteins. It has therefore become urgent to characterize and validate the methods available for liquid chromatography-tandem mass spectrometry (LC/MS-MS) targeted quantification of peptide and protein biomarkers in biological fluids in the context of in vitro diagnostics. LC-MS/MS for the detection of peptides and proteins is currently the main approach used in the field of cMSP...
May 23, 2018: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/29790663/a-distinctively-expressed-long-noncoding-rna-rp11-466i1-1-may-serve-as-a-prognostic-biomarker-in-hepatocellular-carcinoma
#3
Junyong Zhang, Di Zhang, Qi Zhao, Jianni Qi, Xiao Li, Chengyong Qin
It is urgent to explore effective diagnostic and prognostic biomarkers for hepatocellular carcinoma (HCC). Now, both lncRNAs and lipid metabolism are involved in tumor pathogenesis. Long noncoding RNA, RP11-466I1.1, could likely be linked to lipid metabolism according to our bioinformatics analysis, yet studies about RP11-466I1.1 expression in tumors and its potential functions are still lacking. We aimed to explore the expression and correlations with clinical features of a long noncoding RNA, RP11-466I1.1, and further analyze its diagnostic and prognostic values in hepatocellular carcinoma...
May 23, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29790491/advancements-in-microfluidic-technologies-for-isolation-and-early-detection-of-circulating-cancer-related-biomarkers
#4
REVIEW
Ankit Rana, Yuqian Zhang, Leyla Esfandiari
Early stage detection of cancer is essential for the improved long-term survival of patients. Currently, costly, extensively complex and invasive procedures, such as surgical tissue biopsies, are used for cancer screening. Thus, over the past few decades, advancements in microfluidics and lab-on-a-chip approaches have been made to develop minimally invasive and miniaturized platforms to identify and segregate circulating cancer biomarkers such as exosomes, circulating tumor cells (CTCs) and cell-free DNA (cfDNA) from body fluids...
May 23, 2018: Analyst
https://www.readbyqxmd.com/read/29790242/looking-for-trouble-diagnostics-expanding-disease-and-producing-patients
#5
Bjørn Hofmann
Novel tests give great opportunities for earlier and more precise diagnostics. At the same time, new tests expand disease, produce patients, and cause unnecessary harm in overdiagnosis and overtreatment. How can we evaluate diagnostics to obtain the benefits and avoid harm? One way is to pay close attention to the diagnostic process and its core concepts. Doing so reveals 3 errors that expand disease and increase overdiagnosis. The first error is to decouple diagnostics from harm, eg, by diagnosing insignificant conditions...
May 23, 2018: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/29790216/decreased-expression-of-hsa_circ_0137287-predicts-aggressive-clinicopathologic-characteristics-in-papillary-thyroid-carcinoma
#6
Xiabin Lan, Jun Cao, Jiajie Xu, Chao Chen, Chuanming Zheng, Jiafeng Wang, Xuhang Zhu, Xin Zhu, Minghua Ge
BACKGROUND: Circular RNA (circRNA) is a new type of noncoding RNA that can serve as ideal biomarkers. Evidence has showed that circRNAs play an important role in carcinogenesis and cancer development. However, little is known about the diagnostic value of circRNAs in papillary thyroid carcinoma (PTC) as well as their associations with clinicopathologic characteristics of patients with PTC. METHODS: The expression levels of hsa_circ_0137287 were detected in 120 PTC and 60 adjacent noncancerous thyroid tissues by quantitative real-time polymerase chain reaction...
May 22, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29790168/periodontitis-and-placental-growth-factor-in-oral-fluids-are-early-pregnancy-predictors-of-gestational-diabetes-mellitus
#7
Alejandra Chaparro, Edgardo Zúñiga, Manuel Varas-Godoy, Daniela Albers, Valeria Ramírez, Marcela Hernández, Juan P Kusanovic, Stephanie Acuña-Gallardo, Gregory Rice, Sebastián E Illanes
BACKGROUND: Gestational Diabetes Mellitus (GDM) affects around 7-10% of all pregnancies. Early detection of predisposition to GDM is the first step in developing efficacious preventive treatment. The objective of the present study was to establish the utility of placental proteins presents in oral fluids (gingival crevicular fluid [GCF] and saliva), and periodontal disease status as early pregnancy predictors of GDM. MATERIAL AND METHODS: A nested case control within a prospective cohort was conducted...
May 22, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29789958/prosthetic-joint-infections-an-update
#8
REVIEW
C L Abad, A Haleem
PURPOSE OF REVIEW: Prosthetic joint infection (PJI) is a rare but serious complication that is frequently misdiagnosed. We aimed to highlight the nuances of PJI diagnosis and antimicrobial therapies and provide clarity in key areas of management. RECENT FINDINGS: Current research in PJI centers on a potential role for diagnostic biomarkers, molecular techniques, and implant sonication to reduce culture-negativity rates. The optimal duration of antimicrobial therapy remains controversial...
May 22, 2018: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/29788800/relationship-between-ykl-40-and-pulmonary-arterial-hypertension-in-systemic-sclerosis
#9
Tetsuya Furukawa, Kiyoshi Matsui, Masayasu Kitano, Yuichi Yokoyama, Masahiro Sekiguchi, Naoto Azuma, Yasutomo Imai, Seiichi Hirota, Kiyofumi Yamanishi, Hajime Sano
OBJECTIVES: Systemic sclerosis (SSc) is an intractable connective tissue disease that causes skin and organ fibrosis. Interstitial lung disease (ILD) and pulmonary arterial hypertension (PAH) affect its prognosis. YKL-40 protein impacts inflammation and tissue remodeling. Therefore, we evaluated the utility of YKL-40 blood levels in identifying patients with SSc complicated by PAH, as confirmed by immunohistochemistry (IHC) examination. METHODS: We retrospectively analyzed 78 patients with SSc and performed IHC on 7 normal and 7 SSc skin samples in the Japanese population...
May 23, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29788743/novel-insights-into-transcriptional-dysregulation-in-colorectal-cancer
#10
Y Feodorova, D Tashkova, I Koev, A Todorov, G Kostov, K Simitchiev, V Belovejdov, R Dimov, V Sarafian
Colorectal cancer (CRC) is a leading cause of cancer-related mortality worldwide. Although CRC has been comprehensively characterized at the molecular level, the tumor heterogeneity hinders the identification of reliable diagnostic, prognostic and predictive biomarkers. Molecular stratification of CRC is based on prevalent gene mutations and transcription profiles but its significance for clinical practice remains obscure. Indeed, activating mutations in the genes KRAS, NRAS and BRAF are the only predictive biomarkers for anti-EGFR antibody therapy routinely tested the clinic for advanced stages of CRC...
March 14, 2018: Neoplasma
https://www.readbyqxmd.com/read/29788534/prospective-evaluation-of-68-ga-dotatate-pet-ct-in-limited-disease-neuroendocrine-tumors-and-or-elevated-serum-neuroendocrine-biomarkers
#11
Sophie Gabriel, Philippe Garrigue, Laetitia Dahan, Frédéric Castinetti, Frédéric Sebag, Karine Baumstark, Cendrine Archange, Jha Abhishek, Karel Pacak, Benjamin Guillet, David Taïeb
CONTEXT: The 68 Ga-labelled somatostatin analogues (68 Ga-DOTA-SSAs) is becoming popular as an important diagnostic tool in neuroendocrine tumors as evidenced by a growing number of reports detailing institutional experience with various DOTA peptides. However, only few prospective studies have compared 68 Ga-DOTA-SSAs and somatostatin receptor scintigraphy (SRS) in gastroenteropancreatic neuroendocrine tumors (GEP-NETs) and pulmonary neuroendocrine tumors. OBJECTIVE: The aim of our prospective study was to perform head-to-head comparison between 68 Ga-DOTATATE PET/CT and standard imaging work-up (SI) that included multiphasic CT, liver MRI, and SRS using single photon emission computed tomography...
May 22, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29788410/differentiation-between-pediatric-irritable-bowel-syndrome-and-inflammatory-bowel-disease-based-on-fecal-scent-proof-of-principle-study
#12
Sofie Bosch, Nora van Gaal, Roy P Zuurbier, James A Covington, Alfian N Wicaksono, Maarten H Biezeveld, Marc A Benninga, Chris J Mulder, Nanne K H de Boer, Tim G J de Meij
Background: The diagnostic work-up of pediatric irritable bowel syndrome (IBS) and functional abdominal pain-not otherwise specified (FAP-NOS) commonly includes invasive tests for discrimination from inflammatory bowel disease (IBD). As this carries a high burden on patients, an ongoing need exists for development of noninvasive diagnostic biomarkers for IBS and FAP-NOS. Several studies have shown microbiota alterations in IBS/FAP, which are considered to be reflected by fecal volatile organic compounds (VOCs)...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29788013/cerebrospinal-fluid-bace1-activity-and-sa%C3%AE-pp%C3%AE-as-biomarker-candidates-of-alzheimer-s-disease
#13
Panagiotis Alexopoulos, Nathalie Thierjung, Timo Grimmer, Marion Ortner, Polychronis Economou, Konstantinos Assimakopoulos, Philippos Gourzis, Antonios Politis, Robert Perneczky
BACKGROUND/AIMS: The utility of β-site amyloid-β precursor protein (AβPP) cleaving enzyme 1 (BACE1) activity and soluble AβPP β (sAβPPβ) levels in cerebrospinal fluid (CSF) in detecting Alzheimer's disease (AD) is still elusive. METHODS: BACE1 activity and sAβPPβ concentration were measured in patients with AD dementia (n = 56) and mild cognitive impairment (MCI) due to AD (n = 76) with abnormal routine AD CSF markers, in patients with MCI with normal CSF markers (n = 39), and in controls without preclinical AD (n = 48)...
May 22, 2018: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/29787428/use-of-proteomic-and-hematology-biomarkers-for-prediction-of-hematopoietic-acute-radiation-syndrome-severity-in-baboon-radiation-models
#14
William F Blakely, David L Bolduc, Jeff Debad, George Sigal, Matthias Port, Michael Abend, Marco Valente, Michel Drouet, Francis Hérodin
Use of plasma proteomic and hematological biomarkers represents a promising approach to provide useful diagnostic information for assessment of the severity of hematopoietic acute radiation syndrome. Eighteen baboons were evaluated in a radiation model that underwent total-body and partial-body irradiations at doses of Co gamma rays from 2.5 to 15 Gy at dose rates of 6.25 cGy min and 32 cGy min. Hematopoietic acute radiation syndrome severity levels determined by an analysis of blood count changes measured up to 60 d after irradiation were used to gauge overall hematopoietic acute radiation syndrome severity classifications...
July 2018: Health Physics
https://www.readbyqxmd.com/read/29787335/platelet-proteomics-from-discovery-to-diagnosis
#15
Christina Looße, Frauke Swieringa, Johan W M Heemskerk, Albert Sickmann, Christin Lorenz
Platelets are the smallest cells within the circulating blood with key roles in physiological haemostasis and pathological thrombosis regulated by the onset of activating/inhibiting processes via receptor responses and signalling cascades. Areas covered: Proteomics as well as genomic approaches have been fundamental in identifying and quantifying potential targets for future diagnostic strategies in the prevention of bleeding and thrombosis, and uncovering the complexity of platelet functions in health and disease...
May 22, 2018: Expert Review of Proteomics
https://www.readbyqxmd.com/read/29786789/protocols-for-tissue-microarrays-in-prostate-cancer-studies
#16
Tatjana Vlajnic, Serenella Eppenberger-Castori, Lukas Bubendorf
Tissue microarray (TMA) technology is a method for high-throughput analysis of tissue biomarkers, commonly used in translational cancer research. TMAs allow performing a variety of in situ applications on hundreds of tissue samples simultaneously using the same protocols as for conventional slides. Thereby, precious material from patient samples remains largely preserved while costs in resources and time in laboratory processing decrease. Therefore, a TMA is a powerful tool to identify and study biomarkers that may have a potential diagnostic, prognostic, and predictive value...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786051/urinary-extracellular-vesicle-a-potential-source-of-early-diagnostic-and-therapeutic-biomarker-in-diabetic-kidney-disease
#17
REVIEW
Wei-Cheng Xu, Ge Qian, Ai-Qun Liu, Yong-Qiang Li, He-Qun Zou
Objective: Diabetic kidney disease (DKD) has become one of the major causes of end-stage renal disease. Urinary extracellular vesicles (uEVs) contain rich biological information which could be the ideal source for noninvasive biomarkers of DKD. This review discussed the potential early diagnostic and therapeutic values of proteins and microRNAs in uEVs in DKD. Data Sources: This review was based articles published in PubMed, Embase, Cochrane, and Google Scholar databases up to November 20, 2017, with the following keywords: "Diabetic kidney disease", "Extracellular vesicle", and "Urine"...
June 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29786050/diagnostic-performance-of-intestinal-fusobacterium-nucleatum-in-colorectal-cancer-a-meta-analysis
#18
Bo-Jian Peng, Chuang-Yu Cao, Wei Li, Yong-Jian Zhou, Yuan Zhang, Yu-Qiang Nie, Yan-Wen Cao, Yu-Yuan Li
Background: Increasing evidence has supported the link of intestinal Fusobacterium nucleatum infection to colorectal cancer (CRC). However, the value of F. nucleatum as a biomarker in CRC detection has not been fully defined. In order to reduce the random error and bias of individual research, this meta-analysis aimed to evaluate the diagnostic performance of intestinal F. nucleatum in CRC patients and provide evidence-based data to clinical practice. Methods: An article search was performed from PubMed, Embase, Cochrane Library, and Web of Science databases up to December 2017, using the following key words: "Fusobacterium nucleatum", "Fusobacterium spp...
June 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29785855/optimizing-protein-harvest-from-nasal-brushings-for-determining-local-allergy-responses
#19
Erin C Saricilar, Aneeza Hamizan, Raquel Alvarado, Janet Rimmer, William Sewell, Jessica Tatersall, Henry P Barham, Richard Harvey
Background Rhinitis is a highly prevalent yet often misdiagnosed condition. Patients who have local allergic rhinitis are regularly mislabeled as having a nonallergic etiology. Thus, a highly accurate, reproducible, and noninvasive assessment, which can be performed quickly and with minimal discomfort to the patient, is required. Objective The aim of this research was to identify the efficiency of various nasal brushes as tools for harvest and collection of epithelial proteins and its suitability for identification of rhinitis...
January 1, 2018: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/29785842/circular-rna-0068669-as-a-new-biomarker-for-hepatocellular-carcinoma-metastasis
#20
Ting Yao, Qingqing Chen, Zhouwei Shao, Zhihua Song, Liyun Fu, Bingxiu Xiao
BACKGROUND: Circular RNAs (circRNAs) play important roles in disease occurrence. However, the roles of circRNAs in the diagnosis of hepatocellular carcinoma (HCC) are largely unknown. The aim of this study is to investigate the clinical diagnostic values of hsa_circ_0068669 (Alias: hsa_circ_103561), one of the representative HCC-associated circRNAs. METHODS: Hsa_circ_0068669 expression levels in HCC tissues, HCC cell lines, and chronic hepatitis tissues were detected by real-time quantitative reverse transcription-polymerase chain reaction...
May 21, 2018: Journal of Clinical Laboratory Analysis
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