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Alpha macroglobulin

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https://www.readbyqxmd.com/read/29114703/validation-of-hepa-index-as-a-non-invasive-biomarkers-panel-for-assessment-of-hepatic-fibrosis-in-egyptians-with-chronic-hepatitis-c
#1
Mohamed Alboraie, Kerstin Schütte, Marwa Khairy, Marwa Elsharkawy, Noha Asem, Fathy Elghamry, Helmy Shalaby, Gamal Esmat, Peter Malfertheiner
To validate the diagnostic performance of Hepa-Index in predicting different stages of hepatic fibrosis in Egyptian patients with chronic hepatitis C (CHC). Methods: Hundred treatment naïve chronic hepatitis C Egyptian patients were prospectively enrolled between June 2014 and January 2015. They were subjected to: platelet count, alpha-2-macroglobulin (α2-MG), total bilirubin, gamma glutamyl transpeptidase (GGT), total cholesterol, liver biopsy and histopathological staging of hepatic fibrosis according to METAVIR scoring system...
November 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/29108477/hyperthermia-and-mild-traumatic-brain-injury-effects-on-inflammation-and-the-cerebral-vasculature
#2
Jessie Truettner, Helen M Bramlett, W Dalton Dietrich
Mild traumatic brain injury (mTBI) or concussion represents the majority of TBIs brain trauma in the United States. The pathophysiology of mTBI is complex and may include both focal and diffuse injury patterns. In addition to altered circuit dysfunction and diffuse traumatic axonal injury (DTAI), chronic neuroinflammation has also been implicated in the pathophysiology of mTBI. Recently, our laboratory has reported the detrimental effects of mild hyperthermic mTBI in terms of worsening histopathological and behavioral outcomes...
November 6, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29093276/alpha-2-macroglobulin-as-a-promising-biological-marker-of-endothelial-function
#3
Ryo Shimomura, Tomohisa Nezu, Naohisa Hosomi, Shiro Aoki, Takamichi Sugimoto, Naoto Kinoshita, Mutsuko Araki, Tetsuya Takahashi, Hirofumi Maruyama, Masayasu Matsumoto
AIMS: Alpha-2-macroglobulin (α2MG) is thought to be associated with inflammatory reactions and procoagulant properties that might cause ischemic stroke. Endothelial dysfunction plays an important role in atherosclerosis development and in the occurrence of cardiovascular events. In this study, we investigated whether serum α2MG levels, endothelial function, and endothelial progenitor cell (EPC) number were associated in patients with chronic stroke or cardiovascular risk factors. METHODS: Patients with a history of stroke or any established cardiovascular risk factors were enrolled in this study (n=102; 69 men, 70...
November 1, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/29091011/clinical-proteomics-and-cytokine-profiling-for-dengue-fever-disease-severity-biomarkers
#4
Manali Jadhav, Monalisha Nayak, Swati Kumar, Apoorva Venkatesh, Sandip K Patel, Vipin Kumar, Sarthak Sharma, Biaus Samanta, Satarupa Deb, Avik Karak, Sumit Verma, Arunansu Talukdar, Sanjay K Kochar, Preeti Mansukhani, Mayuri Gandhi, Sanjeeva Srivastava
Dengue fever (DF) is a major global health burden with a pathophysiology that is still incompletely understood. Biomarkers that predict and explain susceptibility to DF and its progression to its more severe hemorrhagic form are much needed. DF is endemic in tropical and subtropical regions of the world, with a rapidly increasing incidence of disease severity. We conducted a clinical biomarker discovery study using both a case-control and longitudinal study design. Plasma proteome alterations in patients with DF (n = 12) and dengue hemorrhagic fever (DHF, n = 24) were analyzed in comparison to healthy controls (HCs, n = 16), using the isobaric tags for relative and absolute quantification (iTRAQ)-based quantitative proteomics methodology (false discovery rate of 1%, ≥2 peptides)...
November 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/29037141/analysis-of-four-circulating-complexes-of-insulin-like-growth-factor-binding-proteins-in-human-blood-during-aging
#5
O Nedić, M Šunderić, N Gligorijević, V Malenković, G Miljuš
The primary role of insulin-like growth factor binding proteins (IGFBPs) is to regulate availability of IGFs for interacting with receptors, but IGFBPs perform IGF-independent actions as well. The availability and activity of IGFBPs in the circulation is influenced primarily by their concentration and structural modifications, but possibly also by interaction with major plasma proteins such as transferrin, alpha-2-macroglobulin (α2M), and fibrinogen. Four types of circulating IGFBP complexes were examined in this study by immuno- and ligand-binding assays in adults of different age...
October 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28969563/chemotherapeutic-drugs-and-plasma-proteins-exploring-new-dimensions
#6
Mohammad Khalid Zia, Tooba Siddiqui, Syed Saqib Ali, Ahmed Abdur Rehman, Haseeb Ahsan, Fahim Halim Khan
In the last few decades, advances in the cancer chemotherapy have been a marked success. A large number of anticancer drugs currently in use include drugs based on platinum complexes such as cisplatin, base analogues such as 5-florouracil and some ruthenium drugs. This review provides a bird's eye view of interaction of a number of clinically important drugs currently in use that show covalent or non-covalent interaction with serum proteins. . Platinum drug-cisplatin interacts covalently and alters the function of the key plasma protease inhibitor molecule -alpha-2-macroglobulin and induces the conformational changes in the protein molecule and inactivates it...
October 2, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28930915/microvesicle-subsets-in-sepsis-due-to-community-acquired-pneumonia-compared-to-faecal-peritonitis
#7
Hazem M S Lashin, Suchita Nadkarni, Silvia Oggero, Hefin R Jones, Julian C Knight, Charles J Hinds, Mauro Perretti
RATIONALE: Microvesicles (MV) act as a non-soluble means of inter-cellular communication, with effector roles in disease pathogenesis and potentially as biomarkers. Previously, we reported that neutrophil MV expressing alpha-2-macroglobulin (A2MG) are protective in experimental sepsis and associate with survival in a small cohort of patients with sepsis due to community acquired pneumonia (CAP). OBJECTIVES: To characterise MV profiles in sepsis due to CAP or faecal peritonitis (FP) and determine their relation to outcome...
September 19, 2017: Shock
https://www.readbyqxmd.com/read/28912679/proteomic-differences-in-blood-plasma-associated-with-antidepressant-treatment-response
#8
Christoph W Turck, Paul C Guest, Giuseppina Maccarrone, Marcus Ising, Stefan Kloiber, Susanne Lucae, Florian Holsboer, Daniel Martins-de-Souza
The current inability of clinical psychiatry to objectively select the most appropriate treatment is a major factor contributing to the severity and clinical burden of major depressive disorder (MDD). Here, we have attempted to identify plasma protein signatures in 39 MDD patients to predict response over a 6-week treatment period with antidepressants. LC-MS/MS analysis showed that differences in the levels of 29 proteins at baseline were found in the group with a favorable treatment outcome. Most of these proteins were components of metabolism or immune response pathways as well as multiple components of the coagulation cascade...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28888879/fast-form-alpha-2-macroglobulin-a-marker-for-protease-activation-in-plasma-exposed-to-artificial-surfaces
#9
Daniel Biltoft, Jørgen B Gram, Anette Larsen, Anna-Marie B Münster, Johannes J Sidelmann, Karsten Skjoedt, Yaseelan Palarasah
OBJECTIVES: Investigation of the blood compatibility requires a number of sensitive assays to quantify the activation of the blood protein cascades and cells induced by biomaterials. A global assay measuring the blood compatibility of biomaterials could be a valuable tool in such regard. In this study, we investigated whether an enzyme-linked immunosorbent assay (ELISA), that specifically measures the electrophoretic "fast form" of α2-macroglobulin (F-α2M), could be a sensitive and global marker for activation of calcium dependent and in-dependent proteases in plasma exposed to biomaterials in vitro...
September 6, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28870784/isotypes-of-autoantibodies-against-differentially-expressed-novel-malondialdehyde-modified-peptide-adducts-in-serum-of-taiwanese-women-with-rheumatoid-arthritis
#10
Chen-Chung Liao, Yu-Sheng Chang, Chao-Wen Cheng, Wei-Ming Chi, Kai-Leun Tsai, Wei-Jung Chen, Ting-Shuan Kung, Chih-Chun Tai, Yi-Fang Lin, Hung-Tse Lin, Yi-Ying Lu, Ching-Yu Lin
This study identified and validated four differentially expressed novel malondialdehyde (MDA)-modified peptide adducts and evaluated autoantibodies against native and MDA-modified peptides among Taiwanese women patients with rheumatoid arthritis (RA), osteoarthritis (OA) and healthy controls (HCs). Ig kappa chain C region(76-99), alpha-1-antitrypsin(284-298), alpha-2-macroglobulin(824-841), and apolipoprotein B-100(4022-4040) exhibiting 2-fold differences in relative modification ratios were identified by concanavalin A (Con A) affinity chromatography, 1D SDS-PAGE, in-gel digestion, nano-LC/MS/MS and nano-LC/MS using pooled serum-derived Con A-captured proteins from 9 RA and 9 age-matched HCs...
January 6, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/28760704/determination-of-alpha-2-mrap-gene-polymorphisms-in-nephrolithiasis-patients
#11
Atheer Awad Mehde, Wesen Adel Mehdi, Faridah Yusof, Raha Ahmed Raus, Zaima Azira Zainal Abidin, Hamid Ghazali, Azlina Abd Rahman
BACKGROUND: The intron 5 insertion/deletion polymorphism of Alpha-2-macroglobulin receptor-associated protein gene (Alpha-2-MRAP) has been implicated in numerous diseases. The current study was designed to analyze the association of intron 5 insertion/deletion polymorphism of Alpha-2-MRAP with nephrolithiasis patients. METHODS: PCR was conducted on genomic DNA of patients and control to look for Alpha-2-MRAP insertion/deletion polymorphism. Besides that, serum level of Alpha-2-MRAP, oxidative stress marker myeloperoxidase, Malondialdehyde (MDA), Advanced oxidation protein products (AOPP), and uric acid were determined...
December 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28743292/targeted-designed-variants-of-alpha-2-macroglobulin-a2m-attenuate-cartilage-degeneration-in-a-rat-model-of-osteoarthritis-induced-by-anterior-cruciate-ligament-transection
#12
Yang Zhang, Xiaochun Wei, Shawn Browning, Gaetano Scuderi, Lewis S Hanna, Lei Wei
BACKGROUND: The study was performed to evaluate whether targeted alpha-2-macroglobulin (A2M) variants have a similar or enhanced function at wild-type (wt)-A2M to attenuate cartilage degeneration in vivo. METHODS: In and ex-vivo experiment, bovine cartilage explants (BCE) were incubated with TNF-α and IL-1β with or without wt-A2M or A2M variants. Cartilage catabolism was measured in culture supernatant by sulfated glycosaminoglycan (sGAG). In an in-vivo experiment, 2-month-old male Wistar rats (n = 77) were randomly divided into seven groups and treated with different doses of A2M or its variants by intra-articular injection at 24 hours and day 14 after anterior cruciate ligament transection (ACLT), receiving (1) ACLT/PBS; (2) ACLT/wt-A2M (0...
July 25, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28710882/mid-trimester-preterm-premature-rupture-of-membranes-pprom-etiology-diagnosis-classification-international-recommendations-of-treatment-options-and-outcome
#13
REVIEW
Michael Tchirikov, Natalia Schlabritz-Loutsevitch, James Maher, Jörg Buchmann, Yuri Naberezhnev, Andreas S Winarno, Gregor Seliger
Mid-trimester preterm premature rupture of membranes (PPROM), defined as rupture of fetal membranes prior to 28 weeks of gestation, complicates approximately 0.4%-0.7% of all pregnancies. This condition is associated with a very high neonatal mortality rate as well as an increased risk of long- and short-term severe neonatal morbidity. The causes of the mid-trimester PPROM are multifactorial. Altered membrane morphology including marked swelling and disruption of the collagen network which is seen with PPROM can be triggered by bacterial products or/and pro-inflammatory cytokines...
July 15, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28683140/morgagnian-cataract-resulting-from-a-naturally-occurring-nonsense-mutation-elucidates-a-role-of-cpamd8-in-mammalian-lens-development
#14
Anne K Hollmann, Insa Dammann, Wiebke M Wemheuer, Wilhelm E Wemheuer, Almuth Chilla, Andrea Tipold, Walter J Schulz-Schaeffer, Julia Beck, Ekkehard Schütz, Bertram Brenig
To investigate the genetic basis of hereditary lens opacities we analyzed 31 cases of bilateral congenital cataract in Red Holstein Friesian cattle. A genome-wide association study revealed a significant association on bovine chromosome 7 at positions 6,166,179 and 12,429,691. Whole genome re-sequencing of one case and four relatives showed a nonsense mutation (g.5995966C>T) in the PZP-like, alpha-2-macroglobulin domain containing 8 (CPAMD8) gene leading to a premature stop codon (CPAMD8 p.Gln74*) associated with cataract development in cattle...
2017: PloS One
https://www.readbyqxmd.com/read/28681077/direct-analysis-of-site-specific-n-glycopeptides-of-serological-proteins-in-dried-blood-spot-samples
#15
Na Young Choi, Heeyoun Hwang, Eun Sun Ji, Gun Wook Park, Ju Yeon Lee, Hyun Kyoung Lee, Jin Young Kim, Jong Shin Yoo
Dried blood spot (DBS) samples have a number of advantages, especially with respect to ease of collection, transportation, and storage and to reduce biohazard risk. N-glycosylation is a major post-translational modification of proteins in human blood that is related to a variety of biological functions, including metastasis, cell-cell interactions, inflammation, and immunization. Here, we directly analyzed tryptic N-glycopeptides from glycoproteins in DBS samples using liquid chromatography-tandem mass spectrometry (LC-MS/MS) without centrifugation of blood samples, depletion of major proteins, desalting of tryptic peptides, and enrichment of N-glycopeptides...
August 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28627459/peripheral-blood-gene-expression-of-acute-phase-proteins-in-people-with-first-episode-psychosis
#16
Jie Yin Yee, Milawaty Nurjono, Wai Yee Ng, Stephanie Ruth Teo, Tih-Shih Lee, Jimmy Lee
BACKGROUND: There is a growing interest in the association between schizophrenia and the activation of inflammatory system with signs of acute phase (AP) response. Majority of such studies had focused on C-reactive protein (CRP). The aims of the present study were (i) to examine the gene expression profiles of other acute phase proteins (APP), namely haptoglobin (HP), alpha-1 antitrypsin (A1T), and alpha-2 macroglobulin (A2M) in patients with first episode psychosis (FEP) over a period of three months and (ii) to explore the association between APP levels and severity of symptoms...
June 13, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28601647/metalloproteomic-and-differential-expression-in-plasma-in-a-rat-model-of-type-1-diabetes
#17
Camila Pereira Braga, José Cavalcante Souza Vieira, Aline de Lima Leite, Ana Angélica Henrique Fernandes, Marília Afonso Rabelo Buzalaf, Pedro de Magalhães Padilha
Type 1 diabetes is characterized by hyperglycemia, which in the chronic stage is associated with abnormalities in lipids, protein and, carbohydrate metabolism, as well as oxidative stress. New strategies for prevention and treatment are needed, as type 1 diabetes affects life quality and survival, and involves high-cost treatment. Proteomic and metalloproteomic studies can elucidate the functional and physiological aspects of biomolecules. In the present study, differential proteomics was used to identify potential biomarkers of diabetes in rat plasma associated with copper, selenium, zinc, and magnesium fractionation in control and diabetic rats, as well as diabetic rats treated with insulin...
November 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28600207/conformational-behavior-of-alpha-2-macroglobulin-aggregation-and-inhibition-induced-by-tfe
#18
Ahmed Abdur Rehman, Masihuz Zaman, Mohammad Khalid Zia, Haseeb Ahsan, Rizwan Hasan Khan, Fahim Halim Khan
Alpha-2-macroglobulin (α2M), a pan-proteinase inhibitor, inhibits a variety of endogenous and exogenous proteinases and constitutes an important part of body's innate defense system. In the present study, we explored how trifluoroethanol (TFE) may modulate the structure, antiproteinase activity and aggregation of α2M. TFE was sequentially added over a range of 0-20% (v/v) and the effects induced were studied by activity assay, intrinsic fluorescence, ANS fluorescence, circular dichroism, turbidity assay, Rayleigh scattering measurement and ThT fluorescence measurement...
November 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28592917/persistent-unresolved-inflammation-in-the-mecp2-308-female-mutated-mouse-model-of-rett-syndrome
#19
Alessio Cortelazzo, Claudio De Felice, Bianca De Filippis, Laura Ricceri, Giovanni Laviola, Silvia Leoncini, Cinzia Signorini, Monica Pescaglini, Roberto Guerranti, Anna Maria Timperio, Lello Zolla, Lucia Ciccoli, Joussef Hayek
Rett syndrome (RTT) is a rare neurodevelopmental disorder usually caused by mutations in the X-linked gene methyl-CpG-binding protein 2 (MECP2). Several Mecp2 mutant mouse lines have been developed recapitulating part of the clinical features. In particular, Mecp2-308 female heterozygous mice, bearing a truncating mutation, are a validated model of the disease. While recent data suggest a role for inflammation in RTT, little information on the inflammatory status in murine models of the disease is available...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28570120/characterization-of-the-coagulation-profile-in-children-with-liver-disease-and-extrahepatic-portal-vein-obstruction-or-shunt
#20
William Beattie, Maria Magnusson, Winita Hardikar, Paul Monagle, Vera Ignjatovic
INTRODUCTION: Chronic liver disease causes a disruption of procoagulant and anticoagulant factors, resulting in a fragile state, prone to increased rates of both bleeding and thrombosis. Currently, there is limited literature describing the changes observed in pediatric liver disease and extrahepatic portal vein obstruction or shunt. This study aimed to describe the changes that occur in children with chronic liver disease and extrahepatic portal vein obstruction or shunt. MATERIALS AND METHODS: We measured the concentration and activity of key procoagulant and anticoagulant factors in children with liver disease, children with extrahepatic portal vein obstruction or shunt, and healthy children...
June 1, 2017: Pediatric Hematology and Oncology
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