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https://www.readbyqxmd.com/read/28444965/serum-free-light-chain-quantitative-assays-dilemma-of-a-biomarker
#1
Giovanni Cigliana, Francesca Gulli, Cecilia Napodano, Krizia Pocino, Elena De Santis, Luigi Colacicco, Iole Cordone, Laura Conti, Umberto Basile
BACKGROUND: Serum free light chains detection assays are consistently meeting greater interest for the diagnosis and monitoring of monoclonal gammopathies and plasma cell dyscrasias. Nowadays, there are neither standardized methods nor reference material for the determination of free light chains; for this reason, it is important to compare two different assays used in clinical laboratory. METHODS: We evaluated 300 serum samples from patients with B-cell disorders and compared the analytical performances of both assay...
April 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28439985/the-utility-of-mass-fix-to-detect-and-monitor-monoclonal-proteins-in-the-clinic
#2
Paolo Milani, David L Murray, David R Barnidge, Mindy C Kohlhagen, John R Mills, Giampaolo Merlini, Surendra Dasari, Angela Dispenzieri
The detection and quantification of monoclonal-proteins (M-proteins) are necessary for the diagnosis and evaluation of response in plasma cell dyscrasias. Immunoglobulin enrichment-coupled with matrix-assisted laser desorption ionization time-of-flight mass-spectrometry (MASS-FIX) is a simple and inexpensive method to identify M-proteins, but its clinical generalizability has not yet been elucidated. We compared MASS-FIX to protein electrophoresis (PEL), serum/urine immunofixation-electrophoresis (IFE) and quantitative serum free-light chain (FLC) for the identification of M-proteins in different clinical diagnoses...
April 25, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28439924/prevalence-and-predictors-of-thyroid-functional-abnormalities-in-newly-diagnosed-al-amyloidosis
#3
E Muchtar, D S Dean, A Dispenzieri, D Dingli, F K Buadi, M Q Lacy, S R Hayman, P Kapoor, N Leung, S Russell, J A Lust, Yi Lin, R Warsame, W Gonsalves, T V Kourelis, R S Go, R Chakraborty, S Zeldenrust, R A Kyle, S Vincent Rajkumar, S K Kumar, M A Gertz
BACKGROUND: Data on the effect of systemic immunoglobulin light chain amyloidosis (AL amyloidosis) on thyroid function are limited. OBJECTIVE: To assess the prevalence of hypothyroidism in AL amyloidosis patients and determine its predictors. METHODS: 1142 newly diagnosed AL amyloidosis patients were grouped based on the thyroid-stimulating hormone (TSH) measurement at diagnosis: hypothyroid group (TSH above upper normal reference; >5 mIU L(-1) ; n = 217, 19% of study participants) and euthyroid group (n = 925, 81%)...
April 24, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28434927/impact-of-autologous-stem-cell-transplantation-on-the-incidence-and-outcome-of-oligoclonal-bands-in-patients-with-light-chain-amyloidosis
#4
Luis Gerardo Rodríguez-Lobato, Carlos Fernández de Larrea, M Teresa Cibeira, Natalia Tovar, Juan I Aróstegui, Laura Rosiñol, Tania Díaz, Ester Lozano, Montserrat Elena, Jordi Yagüe, Joan Bladé
The emergence of oligoclonal bands (OB) in patients with multiple myeloma achieving a complete remission (CR) after autologous stem cell transplantation (ASCT) and the use of novel agents is a well-recognized event. The presence of OB is associated with favorable outcome. However, the emergence of OB in light-chain (AL) amyloidosis has never been investigated. The aim of the study was to determine the incidence, natural history and prognostic impact of OB in 50 patients with AL amyloidosis who achieved at least a partial response (PR) either after up-front ASCT (20 patients [40%]) or after conventional treatment in patients ineligible for transplant (30 patients [60%])...
April 18, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28434343/patients-with-al-amyloidosis-and-low-free-light-chain-burden-have-distinct-clinical-features-and-outcome
#5
Paolo Milani, Marco Basset, Francesca Russo, Andrea Foli, Francesca Lavatelli, Mario Nuvolone, Giovanni Ferraro, Giovanni Palladini, Giampaolo Merlini
No abstract text is available yet for this article.
March 2017: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/28434310/diagnostic-accuracy-of-new-indirect-elisas-for-free-light-chain-quantification-in-fat-tissue-of-patients-with-al-amyloidosis
#6
Elisabeth Eelsing, Johan Bijzet, Bouke Hazenberg
No abstract text is available yet for this article.
March 2017: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/28424097/unusual-course-of-generalized-lymph-node-primary-plasmacytoma-in-a-patient-with-sj%C3%A3-gren-s-syndrome-a-case-report
#7
Vadim R Gorodetskiy, Natalya A Probatova, Vladimir I Vasilyev
BACKGROUND: Primary lymph node plasmacytoma is a rare disease that typically involves lymph nodes of the neck. In only 15% of cases is the disease generalized. Here, we present a case of generalized lymph node plasmacytoma in a patient with Sjögren's syndrome with an unusual course. CASE PRESENTATION: A 48-year-old white woman presented to our hospital with enlargement of groups of lymph nodes, liver, and spleen. Her medical history was consistent with a 12-year course of Sjögren's syndrome...
April 20, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28423907/effects-of-active-site-mutations-on-specificity-of-nucleobase-binding-in-human-dna-polymerase-%C3%AE
#8
Melek N Ucisik, Sharon Hammes-Schiffer
Human DNA polymerase η (Pol η) plays a vital role in protection against skin cancer caused by damage from ultraviolet light. This enzyme rescues stalled replication forks at cyclobutane thymine-thymine dimers (TTDs) by inserting nucleotides opposite these DNA lesions. Residue R61 is conserved in the Pol η enzymes across species, but the corresponding residue, as well as its neighbor S62, is different in other Y-family polymerases, Pol ι and Pol κ. Herein, R61 and S62 are mutated to their Pol ι and Pol κ counterparts...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28423017/auxotonic-to-isometric-contraction-transitioning-in-a-beating-heart-causes-myosin-step-size-to-down-shift
#9
Thomas P Burghardt, Xiaojing Sun, Yihua Wang, Katalin Ajtai
Myosin motors in cardiac ventriculum convert ATP free energy to the work of moving blood volume under pressure. The actin bound motor cyclically rotates its lever-arm/light-chain complex linking motor generated torque to the myosin filament backbone and translating actin against resisting force. Previous research showed that the unloaded in vitro motor is described with high precision by single molecule mechanical characteristics including unitary step-sizes of approximately 3, 5, and 8 nm and their relative step-frequencies of approximately 13, 50, and 37%...
2017: PloS One
https://www.readbyqxmd.com/read/28417905/analytical-criticalities-associated-to-different-immunological-methods-for-serum-free-light-chain-detection-in-plasma-cell-dyscrasias-a-description-of-particular-clinical-cases
#10
Rocco Sabatino, Antonio Perrone, Marco Cuomo, Sandra Liotti, Vittoria Barchiesi, Monica Cantile, Ernesta Cavalcanti
Current criteria for differential diagnosis of multiple myeloma (MM), Monoclonal gammopathy of undetermined significance (MGUS), and smoldering multiple myeloma (SMM) are included in the 2003 guidelines by the International Myeloma Working Group (IMWG). An updated version was then published in 2014, highlighting the importance of serum free light chain (sFLC) detection, as well as the κ/λ ratio as excellent indicators of clonality. At present, two commercial assays for sFLC quantification are available: the Freelite™ assay and the N-Latex assay...
April 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28414421/shape-controlled-metal-free-catalysts-facet-sensitive-catalytic-activity-induced-by-the-arrangement-pattern-of-noncovalent-supramolecular-chains
#11
Guangwei Geng, Penglei Chen, Bo Guan, Lang Jiang, Zhongfei Xu, Dawei Di, Zeyi Tu, Weichang Hao, Yuanping Yi, Chuncheng Chen, Minghua Liu, Wenping Hu
Metal-free catalytic materials have recently received broad attention as promising alternatives to metal-involved catalysts. This is owing to their inherent capability to overcome the inevitable limitations of metal-involved catalysts, such as high sensitivity to poisoning, the limited reserves, high cost and scarcity of metals (especially noble metals), etc. However, the lack of shape-controlled metal-free catalysts with well-defined facets is a formidable bottleneck limiting our understandings on the underlying structure-activity relationship at atomic/molecular level, which thereby restrains their rational design...
April 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28412639/aggregation-of-thermoresponsive-core-shell-nanoparticles-influence-of-particle-concentration-dispersant-molecular-weight-and-grafting
#12
Steffen Kurzhals, Noga Gal, Ronald Zirbs, Erik Reimhult
Thermoresponsive core-shell nanoparticles represent an interesting class of materials with a triggered solubility transition. However, depending on the system, their aggregation behavior above the lower critical solution temperature (LCST) is ambiguous and obviously linked to a multitude of parameters. The induced aggregation of a set of well characterized poly(N-isopropylacrylamide)-nitrodopamine grafted superparamagnetic iron oxide nanoparticles is investigated with respect to the PNIPAM molecular weight (5-30kDa) and concentration using differential scanning calorimetry and temperature-cycled dynamic light scattering measurements...
April 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28412401/proteasome-inhibitor-loaded-micelles-enhance-antitumor-activity-through-macrophage-reprograming-by-nf-%C3%AE%C2%BAb-inhibition
#13
Hailiang Wu, Anqi Tao, John D Martin, Sabina Quader, Xueying Liu, Kei Takahashi, Louise Hespel, Yutaka Miura, Yoshihiro Hayakawa, Tatsuro Irimura, Horacio Cabral, Kazunori Kataoka
Macrophage reprogramming towards a tumor attacking phenotype is a promising treatment strategy, yet such strategies are scarce and it is not clear how to combine them with cytotoxic therapies that are often used to treat solid tumors. Here, we evaluate whether a micelle-encapsulated proteasome inhibitor, i.e. the peptide aldehyde drug MG132, which is cytotoxic to cancer cells, can reprogram macrophages to attack the tumor. Through in vitro studies, we demonstrated that the proteasome inhibition reduces nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling - a known promoter of tumor-supporting macrophages and chemoresistance - in both cancer cells and macrophages...
April 12, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28407181/in-vitro-effects-and-mechanisms-of-lycopene-in-mcf-7-human-breast-cancer-cells
#14
S J Peng, J Li, Y Zhou, M Tuo, X X Qin, Q Yu, H Cheng, Y M Li
Breast cancer adversely affects the health status of women; therefore, the prevention and treatment of breast cancer is of critical importance. Lycopene is known to possess several biological effects such as removal of free radicals, alleviation of biological oxidative injury, and inhibition of tumor growth. In this study, we aimed to illustrate the effect of lycopene on tumor cell proliferation and modulation of cancer progression as well as its possible underlying mechanisms in human breast carcinoma cell line MCF-7 in vitro...
April 13, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28406521/dissection-of-the-neocarazostatin-a-c4-alkyl-side-chain-biosynthesis-by-in-vitro-reconstitution
#15
Li Su, Rui Zhang, Kwaku Kyeremeh, Zixin Deng, Hai Deng, Yi Yu
Neocarazostatin A (1) is a potent free radical scavenger possessing an intriguing tricyclic carbazole nucleus with a C4 alkyl side chain attached to ring "A". Although the biosynthetic gene cluster of 1 (nzs) has been identified, and several key steps of the pathway have been well characterized, the enzyme(s) involved in the biosynthesis of the C4 unit still remains obscure. In this work, we demonstrate that three enzymes, including one (MA37-FabG) from primary fatty acid metabolism and two pathway-specific ones (NzsE and NzsF), are responsible for the formation of the side chain precursor...
April 13, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28398583/clsi-based-validation-of-manufacturer-derived-reference-intervals-on-the-cobas-8000-platform
#16
Veronika Leitner-Ferenc, Johanna Atamaniuk, Sonja Jansen-Skoupy, Brigitta Stöckelmeier, Katharina Grohs, Manuela Födinger
Background: Reference intervals provided by diagnostic test manufacturers should be transferred to clinical laboratories after validation. Although protocols exist, laboratories rarely perform and report on results of validation studies. Methods: We validated reference intervals (RIs) of 87 analytes on a Cobas 8000 platform according to standards published by the Clinical and Laboratory Standards Institute (CLSI). Results: For 8 analytes, decision limits were provided in the package inserts...
April 8, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/28394698/generation-of-therapeutic-immunoconjugates-via-residue-specific-conjugation-technology-respect-utilizing-a-native-cysteine-in-the-light-chain-framework-of-oryctolagus-cuniculus
#17
Earl F Albone, Jared L Spidel, Xin Cheng, Young Chul Park, Sara Jacob, Andrew Z Milinichik, Ben Vassen, Janet Butler, J Bradford Kline, Luigi Grasso
The conjugation of toxins, dyes, peptides, or proteins to monoclonal antibodies is often performed via free thiol groups generated by either partial reduction methods or engineering free cysteine residues into the antibody sequence. Antibodies from the rabbit Oryctolagus cuniculus have an additional intrachain disulfide bond, whereby the light chain variable kappa domain is bridged to the constant kappa region between cysteine residues at positions 80 and 171, respectively. Chimerization of rabbit antibodies with human constant domains allows for the generation of a free thiol group at the light chain position 80 (C80) that can be utilized for site-specific conjugation...
April 10, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28389318/engineering-of-a-novel-zipfv-using-leucine-zipper-motif-against-rabies-virus-glycoprotein-g-with-improved-protection-potency-in-vivo
#18
Hualong Xi, Kaixin Zhang, Yanchun Yin, Tiejun Gu, Qing Sun, Zhuang Li, Yue Cheng, Chunlai Jiang, Wei Kong, Yongge Wu
Rabies is an acute zoonotic infectious disease with a high fatality rate but is preventable with vaccination and rabies immunoglobulin (RIG). The single-chain Fv fragment (scFv), a small engineered antigen-binding protein derived from antibody variable heavy (VH) and light (VL) chains connected by a peptide linker, can potentially be used to replace RIG. Here, we produced two peptides VH-JUN-HIS and VL-FOS-HA separately in Escherichia coli and assembled them to form zipFv successfully in vitro. The new zipFv utilizes FOS and JUN leucine zippers to form an antibody structure similar to the IgG counterpart with two free N-terminal ends of VH and VL...
April 4, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28388691/expression-and-prognostic-significance-of-myl9-in-esophageal-squamous-cell-carcinoma
#19
Jian-Hua Wang, Lan Zhang, Shu-Ting Huang, Jing Xu, Yun Zhou, Xing-Juan Yu, Rong-Zhen Luo, Zhe-Sheng Wen, Wei-Hua Jia, Min Zheng
OBJECTIVE: Myosin light chain 9 (MYL9) is necessary for cytoskeletal dynamics and experimental metastasis, but its expression in esophageal squamous cell carcinoma (ESCC) has not been addressed. We investigated the expression pattern and clinical significance of MYL9 in patients with ESCC. METHODS: We examined MYL9 expression using quantitative real-time PCR and western blotting in NE1 immortalized esophageal epithelial cells, ESCC cell lines, and paired ESCC tissues...
2017: PloS One
https://www.readbyqxmd.com/read/28382796/inhibition-of-autophagy-protein-lc3a-as-a-therapeutic-target-in-ovarian-clear-cell-carcinomas
#20
Morikazu Miyamoto, Masashi Takano, Tadashi Aoyama, Hiroaki Soyama, Tomoyuki Yoshikawa, Hitoshi Tsuda, Kenichi Furuya
OBJECTIVE: Ovarian clear cell carcinoma (CCC) is one of histological subtypes showing poor prognosis due to chemoresistance. The association of autophagy-related proteins and clinical implementation in CCC has not been determined. METHODS: The present study investigated whether expression of autophagy-related protein, light chain 3A (LC3A), was related with prognoses in the patients with CCC using immuno-histochemical stainings, and whether inhibition of autophagy modified the sensitivity to cisplatin in CCC cells in vitro...
May 2017: Journal of Gynecologic Oncology
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