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Search results for: monoclonal

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#33453475   2020/12/31 To Up

Characteristics and outcome of multiple myeloma patients presenting with anaemia only: A retrospective multi-centre study.

Multiple myeloma (MM) patients presenting with anaemia as their sole clinical manifestation are rare and not fully defined.
Tamir Shragai, Moshe E Gatt, Adir Shaulov, Eirini Katodritou, Theodora Triantafyllou, Noa Lavi, Anastasia Pouli, Anastasia Sioni, Iuliana Vaxman, Miri Zektser, Chezi Ganzel, Noam Benyamini, Svetlana Trestman, Tomer Ziv-Baran, Yasmin Adam, Yael C Cohen, Irit Avivi

1354 related Products with: Characteristics and outcome of multiple myeloma patients presenting with anaemia only: A retrospective multi-centre study.

1,000 tests1mg100ug

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#33453471   2020/12/31 To Up

Expression of EGFR and conformational forms of EGFR in malignant pleural mesothelioma and its impact on survival.

Conformational forms of the epidermal growth factor receptor (EGFR) are pro-tumorigenic. The prevalence and impact of conformational forms of EGFR in malignant mesothelioma (MM) is unknown. We investigated expression of EGFR and conformational forms of EGFR by immunohistochemistry using EGFR-targeting monoclonal antibodies (mAb). In addition, EGFR gene amplification was investigated by fluorescent in-situ hybridization (FISH). Findings were correlated with survival.
Puey Ling Chia, Sagun Parakh, Prudence Russell, Hui K Gan, Khashayer Asadi, Val Gebski, Carmel Murone, Marzena Walkiewicz, Zhanqi Liu, Bibhusal Thapa, Fiona E Scott, Andrew M Scott, Thomas John

1061 related Products with: Expression of EGFR and conformational forms of EGFR in malignant pleural mesothelioma and its impact on survival.

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#33453429   2021/01/13 To Up

Efficacy of novel bispecific antibody targeting TNF-α/CXCL10 in the treatment of experimental arthritis.

This study was aimed at generating and investigating the efficacy of a novel monoclonal bispecific antibody (BsAb) for the combined inhibition of tumor necrosis factor-α (TNF-α) and CXCL10 as a treatment option for rheumatoid arthritis (RA). A novel BsAb targeting TNF-α and CXCL10 was generated by conjugating a single-chain variable fragment (scFv) of the anti-CXCL10 monoclonal antibody to the Fc region of adalimumab (ADA). The effects of the BsAb on the inflammatory response in the in vitro and in vivo development of arthritis and joint destruction were evaluated in human TNF transgenic (hTNF-Tg) mice, and K/BxN serum transfer arthritis models. The BsAb inhibited CXCL10-mediated CD8 T cell migration. The binding affinity of the BsAb to TNF-α was comparable to that of ADA and suppressed TNF-α induced cell death and inhibited TNF-α induced ICAM-1 and VCAM-1 in RA fibroblast-like synoviocytes (FLSs). The BsAb decreased the expression of TNFSF11 and the production of IL-6 in RA-FLS cells stimulated with TNF-α and CXCL10. Treatment with the BsAb attenuated the development of arthritis in hTNF-Tg mice and suppressed LPS-induced bone erosion. In the K/BxN serum transfer model, BsAb effectively attenuated ankle swelling, synovial inflammation, cartilage damage, and bone destruction, reducing the activation of osteoclasts. The additional neutralization of TNF-α and CXCL10 from treatment with the novel BsAb was more effective than TNF-α inhibition alone in the in vitro and in vivo models of RA. Thus, the BsAb, targeting both TNF-α and CXCL10, may provide a new therapeutic opportunity for RA patients who fail to respond to the blockade of a single cytokine.
Shin Eui Kang, Jin Kyun Park, Hyun Jung Yoo, Young Woo Park, Bum-Chan Park, Jae-Eun Park, Eun Young Lee, Eun Bong Lee, Yeong Wook Song

2538 related Products with: Efficacy of novel bispecific antibody targeting TNF-α/CXCL10 in the treatment of experimental arthritis.

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#33453208   2021/01/13 To Up

Effect of Azide Preservative on Thermomechanical Aggregation of Purified Reference Protein Materials.

Protein aggregation can affect the quality of protein-based therapeutics. Attempting to unravel factors influencing protein aggregation involves systematic studies. These studies often include sodium azide or similar preservatives in the aggregation buffer. This work shows effects of azide on aggregation of two highly purified reference proteins, both a bovine serum albumin (BSA) as well as a monoclonal antibody (NISTmAb). The proteins were aggregated by thermomechanical stress, consisting of simultaneous heating of the solution with gentle agitation. Protein aggregates were characterized by asymmetric flow field flow fractionation (AF) with light scattering measurements along with quantification by UV spectroscopy, revealing strong time-dependent generation of aggregated protein and an increase in aggregate molar mass. Gel electrophoresis was used to probe the reversibility of the aggregation and demonstrated complete reversibility for the NISTmAb, but not so for the BSA. Kinetic fitting to a commonly implemented nucleated polymerization model was also employed to provide mechanistic details into the kinetic process. The model suggests that the aggregation of the NISTmAb proceeds via nucleated growth and aggregate-aggregate condensation in a way that is dependent on the concentration (and presence) of the azide anion. This work overall implicates azide preservatives as having demonstrable effects on thermomechanical stress and aggregation of proteins undergoing systematic aggregation and stability studies.
Sean E Lehman, Ioannis Karageorgos, Jeremy R Filteau, Wyatt N Vreeland

2758 related Products with: Effect of Azide Preservative on Thermomechanical Aggregation of Purified Reference Protein Materials.

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#33453163   2021/01/13 To Up

Discrimination between minimally modified LDL and fully oxidized LDL using monoclonal antibodies.

Low density lipoprotein (LDL) can be oxidized in a stepwise process that leads to the production of minimally modified low density lipoprotein (mm-LDL), in which only the lipid component is oxidized, and then of fully oxidized LDL (oxLDL), in which both the lipids and the protein are oxidized. The thiobarbituric reactive substances (TBARS) assay is a recognized method for determination of oxidized LDL, however this method is unable to distinguish between mm-LDL and oxLDL. In this study, seven specific monoclonal antibodies (mAbs) against human LDL were generated and selectively bound to the apolipoprotein B-100 (apoB-100) component of LDL. Oxidized LDL was produced by incubation of human LDL with 10 μM CuSO for various times. The TBARS assay revealed that the optimal incubation time to achieve maximal lipid oxidation was 9 h. Indirect ELISA using the newly generated mAbs was implemented to differentiate between mm-LDL and oxLDL and it was found that binding of the mAbs to oxLDL was significantly decreased after 48 h of incubation, reflecting the oxidative modification of apoB-100. Our results suggest that the optimal times for incubation of LDL with CuSO for generation of mm-LDL and oxLDL were 9 h and 48 h, respectively.
Kanokwan Lowhalidanon, Panida Khunkaewla

2337 related Products with: Discrimination between minimally modified LDL and fully oxidized LDL using monoclonal antibodies.

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#33452107   // To Up

PD-1 blockade exacerbates infection in rhesus macaques.

Boosting immune cell function by targeting the coinhibitory receptor PD-1 may have applications in the treatment of chronic infections. Here, we examine the role of PD-1 during (Mtb) infection of rhesus macaques. Animals treated with anti-PD-1 monoclonal antibody developed worse disease and higher granuloma bacterial loads compared with isotype control-treated monkeys. PD-1 blockade increased the number and functionality of granuloma Mtb-specific CD8 T cells. In contrast, Mtb-specific CD4 T cells in anti-PD-1-treated macaques were not increased in number or function in granulomas, expressed increased levels of CTLA-4, and exhibited reduced intralesional trafficking in live imaging studies. In granulomas of anti-PD-1-treated animals, multiple proinflammatory cytokines were elevated, and more cytokines correlated with bacterial loads, leading to the identification of a role for caspase 1 in the exacerbation of tuberculosis after PD-1 blockade. Last, increased Mtb bacterial loads after PD-1 blockade were found to associate with the composition of the intestinal microbiota before infection in individual macaques. Therefore, PD-1-mediated coinhibition is required for control of Mtb infection in macaques, perhaps because of its role in dampening detrimental inflammation and allowing for normal CD4 T cell responses.
Keith D Kauffman, Shunsuke Sakai, Nickiana E Lora, Sivaranjani Namasivayam, Paul J Baker, Olena Kamenyeva, Taylor W Foreman, Christine E Nelson, Deivide Oliveira-de-Souza, Caian L Vinhaes, Ziv Yaniv, Cecilia S Lindestam Arleham, Alessandro Sette, Gordon J Freeman, Rashida Moore, , Alan Sher, Katrin D Mayer-Barber, Bruno B Andrade, Juraj Kabat, Laura E Via, Daniel L Barber

1527 related Products with: PD-1 blockade exacerbates infection in rhesus macaques.

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