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MRP 14, Calgranulin B, s100A9, ELISA Kit (includes Catch_Detect Ab's, Std., pre_coated plate)

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[#BMAS1008] MRP 14, Calgranulin B, s100A9, ELISA Kit (includes Catch_Detect Ab's, Std., pre_coated plate)

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BMAS1008 | MRP 14, Calgranulin B, s100A9, ELISA Kit (includes Catch_Detect Ab's, Std., pre_coated plate), kit
More informations about MRP 14, Calgranulin B, s100A9, ELISA Kit (includes Catch_Detect Ab's, Std., pre_coated plate) in Antibody-antibodies.com

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(1) Nickel Sequestration by the Host-Defense Protein Human Calprotectin.[TOP]

Pubmed ID :28573847
Publication Date : //
The human innate immune protein calprotectin (CP, S100A8/S100A9 oligomer, calgranulin A/calgranulin B oligomer, MRP-8/MRP-14 oligomer) chelates a number of first-row transition metals, including Mn(II), Fe(II), and Zn(II), and can withhold these essential nutrients from microbes. Here we elucidate the Ni(II) coordination chemistry of human CP. We present a 2.6-Å crystal structure of Ni(II)- and Ca(II)-bound CP, which reveals that CP binds Ni(II) ions at both its transition-metal-binding sites: the HisAsp motif (site 1) and the His motif (site 2). Further biochemical studies establish that coordination of Ni(II) at the hexahistidine site is thermodynamically preferred over Zn(II). We also demonstrate that CP can sequester Ni(II) from two human pathogens, Staphylococcus aureus and Klebsiella pneumoniae, that utilize this metal nutrient during infection, and inhibit the activity of the Ni(II)-dependent enzyme urease in bacterial cultures. In total, our findings expand the biological coordination chemistry of Ni(II)-chelating proteins in nature and provide a foundation for evaluating putative roles of CP in Ni(II) homeostasis at the host-microbe interface and beyond.

Authors : Nakashige Toshiki G, Zygiel Emily M, Drennan Catherine L, Nolan Elizabeth M,



(2) Myeloid-Related Protein-14/MRP-14/S100A9/Calgranulin B is Associated with Inflammation in Proliferative Diabetic Retinopathy.[TOP]

Pubmed ID :27849448
Publication Date : //
To investigate the expression of the leukocyte proteins myeloid-related protein (MRP)-8 and MRP-14 in proliferative diabetic retinopathy (PDR) and the effect of MRP-8/MRP-14 (calprotectin) heterodimer on induction of proinflammatory factors in human retinal microvascular endothelial cells (HRMEC).

Authors : Abu El-Asrar Ahmed M, Alam Kaiser, Siddiquei Mohammad M, Van den Eynde Kathleen, Mohammad Ghulam, De Hertogh Gert, Opdenakker Ghislain,



(3) Elevated levels of serum MRP8/14 in ankylosing spondylitis: associated with peripheral arthritis and active disease.[TOP]

Pubmed ID :27738838
Publication Date : //
Monocytes of patients with ankylosing spondylitis (AS) have toll-like receptor 4 (TLR4) overexpression on their monocytes. Myeloid-related protein (MRP) 8/14 protein complexes are calcium-binding proteins, which act as endogenous ligands to TLR4. Thus, we studied the levels of MRP8/14 in adult AS patients. MRP8/14 levels were assessed in 99 adult AS patients satisfying Assessments in Ankylosing Spondylitis International Society 2010 criteria and 71 healthy controls by ELISA. Patient disease parameters like patient and physician global assessment, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), swollen and tender joint count, entheseal count by Maastricht enthesitis index, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP) were also recorded. Levels were reassessed in 23 patients after 2-5 months of treatment with NSAIDs. All values are in median (IQR). The serum MRP8/14 levels in patients [34.1 (17.94-264.58) μg/ml] were significantly higher than in healthy controls [4.94 (IQR 3.01-8.32) μg/ml (p < 0.0001)]. Patients with peripheral arthritis (n = 50) had higher levels than those with pure axial disease (n = 49) [40.63 (IQR 28.41-73.15) μg/ml vs. 23.72 (11.04-61.55) μg/ml; p = 0.012]. Levels of MRP8/14 correlated with AS Disease Activity Score (DAS)-CRP (r = 0.23, 95%CI = 0.038-0.422, p = 0.02) and CRP (r = 0.28, 95%CI = 0.081-0.45, p = 0.01), and the correlation was better in early disease [≤5 years disease duration; r = 0.40, p = 0.007 and r = 0.57, p = <0.0001, respectively]. Baseline levels were higher in treatment responders than in non-responders [51.17 vs. 32.22 μg/ml; p = 0.02]. Change in MRP8/14 levels correlated with change in BASDAI and ASDAS-CRP (r = 0.489, p = 0.018 and r = 0·498, p = 0.016, respectively). MRP8/14 levels may be used as a biomarker for activity, peripheral arthritis, and response to therapy.

Authors : Gupta Latika, Bhattacharya Shruti, Agarwal Vikas, Aggarwal Amita,



(4) Alarming consequences - autoinflammatory disease spectrum due to mutations in proline-serine-threonine phosphatase-interacting protein 1.[TOP]

Pubmed ID :27464597
Publication Date : //
To give an overview about the expanding spectrum of autoinflammatory diseases due to mutations in proline-serine-threonine phosphatase-interacting protein 1 (PSTPIP1) and new insights into their pathogenesis.

Authors : Holzinger Dirk, Roth Johannes,



(5) Activation of phagocytic cells by Staphylococcus epidermidis biofilms: effects of extracellular matrix proteins and the bacterial stress protein GroEL on netosis and MRP-14 release.[TOP]

Pubmed ID :27109773
Publication Date : //
The recognition and phagocytosis of free-swimming (planktonic) bacteria by polymorphonuclear neutrophils have been investigated in depth. However, less is known about the neutrophil response towards bacterial biofilms. Our previous work demonstrated that neutrophils recognize activating entities within the extracellular polymeric substance (EPS) of biofilms (the bacterial heat shock protein GroEL) and that this process does not require opsonization. Aim of this study was to evaluate the release of DNA by neutrophils in response to biofilms, as well as the release of the inflammatory cytokine MRP-14. Neutrophils were stimulated with Staphylococcus epidermidis biofilms, planktonic bacteria, extracted EPS and GroEL. Release of DNA and of MRP-14 was evaluated. Furthermore, tissue samples from patients suffering from biofilm infections were collected and evaluated by histology. MRP-14 concentration in blood samples was measured. We were able to show that biofilms, the EPS and GroEL induce DNA release. MRP-14 was only released after stimulation with EPS, not GroEL. Histology of tissue samples revealed MRP-14 positive cells in association with neutrophil infiltration and MRP-14 concentration was elevated in blood samples of patients suffering from biofilm infections. Our data demonstrate that neutrophil-activating entities are present in the EPS and that GroEL induces DNA release by neutrophils.

Authors : Dapunt Ulrike, Gaida Matthias M, Meyle Eva, Prior Birgit, Hänsch Gertrud M,



(6) Myeloid-related Protein 8/14 Levels in Rheumatoid Arthritis: Marker of Disease Activity and Response to Methotrexate.[TOP]

Pubmed ID :26834220
Publication Date : //
Myeloid-related proteins (MRP) 8/14 belong to a family of calcium-binding proteins produced by myeloid cells. Baseline serum levels of MRP8/14 have been shown to predict response to biologicals in rheumatoid arthritis (RA). Because methotrexate (MTX) is the first-line therapy in RA, we studied whether MRP8/14 levels can predict response to MTX.

Authors : Patro Pradeepta Sekhar, Singh Ankita, Misra Ramnath, Aggarwal Amita,



(7) Myeloid-related proteins-8 and -14 are expressed but dispensable in the pathogenesis of experimental epidermolysis bullosa acquisita and bullous pemphigoid.[TOP]

Pubmed ID :26692467
Publication Date : //
Myeloid-related protein-8 (MRP-8) and its heterodimeric partner, MRP-14 belong to the group of danger-associated molecular patterns (DAMPs) and are associated with numerous chronic human disorders. However, their functional role in autoimmunity remains largely unclear.

Authors : Akbarzadeh Reza, Yu Xinhua, Vogl Thomas, Ludwig Ralf J, Schmidt Enno, Zillikens Detlef, Petersen Frank,



(8) Gout Is a Chronic Inflammatory Disease in Which High Levels of Interleukin-8 (CXCL8), Myeloid-Related Protein 8/Myeloid-Related Protein 14 Complex, and an Altered Proteome Are Associated With Diabetes Mellitus and Cardiovascular Disease.[TOP]

Pubmed ID :26248007
Publication Date : //
The frequent association of gout with metabolic syndrome and cardiovascular disease (CVD) suggests that it has a systemic component. Our objective was to study whether circulating proinflammatory cytokines are associated with comorbidities in gout patients.

Authors : Kienhorst Laura B E, van Lochem Ellen, Kievit Wietske, Dalbeth Nicola, Merriman Marilyn E, Phipps-Green Amanda, Loof Arnoud, van Heerde Waander, Vermeulen Sita, Stamp Lisa K, van Koolwijk Elly, de Graaf Jacqueline, Holzinger Dirk, Roth Johannes, Janssens Hein J E M, Merriman Tony R, Broen Jasper C A, Janssen Matthijs, Radstake Timothy R D J,



(9) Elevated expressions of myeloid-related proteins-8 and -14 are danger biomarkers for lupus nephritis.[TOP]

Pubmed ID :26223295
Publication Date : //
Myeloid-related proteins, MRP-8 and -14, which have been identified as molecules that mediate the danger signaling in innate immune response, are also known as the DAMPs (damage associated molecular pattern molecules). The proteins were found in infiltrating macrophages and neutrophils at inflammatory sites. Their expression was correlated with severe forms of glomerulonephritis. Therefore, this study examined whether or not MRP-8 and -14 can be used as biomarkers for identifying severely active lupus nephritis (LN). Total blood leukocyte samples and renal biopsy tissues from a prospective cohort of LN patients were used to determine mRNA and protein expression levels of MRP-8 and -14. The mRNA levels of MRP-8 and -14 in total blood leukocytes were significantly higher in active LN patients than quiescent LN patients and healthy controls. Moreover, the mRNA levels of MRP-8 and -14 in the total blood leukocytes and kidney tissues were significantly correlated with therapeutic response and the mRNA expression levels in the kidney were associated with an early loss of the kidney function. MRP-8 and -14 can be used as non-invasive prognostic biomarkers in patients with LN.

Authors : Tantivitayakul P, Benjachat T, Somparn P, Leelahavanichkul A, Kittikovit V, Hirankarn N, Pisitkun T, Avihingsanon Y,



(10) Myeloid-related protein-14 deficiency promotes inflammation in staphylococcal pneumonia.[TOP]

Pubmed ID :25792636
Publication Date : //
Staphylococcus aureus has evolved as an important cause of pneumonia in both hospital and community settings. Staphylococcal lung infection can lead to overwhelming pulmonary inflammation. During infection, neutrophils release complexes of myeloid-related protein (MRP)8 and MRP14 (MRP8/14). MRP8/14 has been shown to exert pro-inflammatory and chemotactic activity, and to assist in the killing of S. aureus. In the current study we sought to determine the role of MRP8/14 in the host response during S. aureus pneumonia.Pneumonia was induced in wildtype and MRP14-deficient mice (mice unable to form MRP8/14) by intranasal inoculation of 1×10(7) CFU of S. aureus USA300. Mice were sacrificed at 6, 24, 48 or 72 h after infection for analyses.S. aureus pneumonia was associated with a strong rise in MRP8/14 in bronchoalveolar lavage fluid and lung tissue. Surprisingly, MRP14 deficiency had a limited effect on bacterial clearance and was associated with increased cytokine levels in bronchoalveolar lavage fluid and aggravated lung histopathology. MRP14 deficiency in addition was associated with a diminished transmigration of neutrophils into bronchoalveolar lavage fluid at late time-points after infection together with reduced release of nucleosomes.MRP8/14 serves in an unexpected protective role for the lung in staphylococcal pneumonia.

Authors : Achouiti Ahmed, Vogl Thomas, Van der Meer Anne J, Stroo Ingrid, Florquin Sandrine, de Boer Onno J, Roth Johannes, Zeerleder Sacha, van 't Veer Cornelis, de Vos Alex F, van der Poll Tom,