Development and characterization of three novel monoclonal antibodies against CA-125.

We describe here the generation and characterization of three novel hybridoma cell lines producing MAbs against CA-125. CA-125 purified from culture supernatant of ovarian carcinoma cell line OVCAR-3 by affinity chromatography, was used for immunization of BALB/c mice. Three stable cell lines (3C8, 2B6, and 5A12) were selected for production of antibodies against CA-125 and were expanded in mass culture. All three antibodies were shown to recognize linear epitopes. Antibodies 2B6 and 5A12 were determined to recognize epitope cluster B (M 11-like); MAb 3C8 was classified as group A-epitope binders (OC 125-like). The antibodies produced may be used for the development and improvement of CA-125 immunoassays. PMID: 25357999 [PubMed - indexed for MEDLINE]
Source: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy - Category: Microbiology Tags: Monoclon Antib Immunodiagn Immunother Source Type: research

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Basel, 13 July 2020 – Roche (SIX: RO, ROG; OTCQX: RHHBY) today announced that the Phase III IMagyn050 study showed that the addition of Tecentriq® (atezolizumab) to Avastin® (bevacizumab), paclitaxel and carboplatin did not meet its primary endpoint of progression-free survival (PFS) for the front-line treatment of women with newly diagnosed advanced stage ovarian cancer. Topline safety data indicate that safety for Tecentriq in combination with Avastin, paclitaxel and carboplatin was consistent with the known safety profile of the combination.“Ovarian cancer remains one of the most aggressive cancers a...
Source: Roche Media News - Category: Pharmaceuticals Source Type: news
Endometrioid ovarian carcinoma (EOC) has clinical and biological differences compared with other histologic types of ovarian carcinomas, but it shares morphologic and molecular features with endometrioid endometrial carcinoma. To analyze the molecular heterogeneity of EOC according to the new molecular classification of endometrial cancer and to evaluate the prognostic significance of this molecular classification, we have analyzed 166 early-stage EOC by immunohistochemistry for mismatch repair proteins and p53 expression, and by Sanger sequencing for the exonuclease domain of polymerase epsilon (POLE EDM). In addition, we...
Source: The American Journal of Surgical Pathology - Category: Pathology Tags: Original Articles Source Type: research
Immunotherapy of ovarian cancer with a monoclonal antibody specific for the extracellular domain of anti-Müllerian hormone receptor II. Oncotarget. 2020 May 19;11(20):1894-1910 Authors: Mazumder S, Sw. V, Komar AA, Johnson JM, Tuohy VK Abstract Epithelial ovarian carcinoma (EOC) is the most prevalent and lethal form of ovarian cancer. The low five-year overall survival after EOC diagnosis indicates an urgent need for more effective ways to control this disease. Anti-Müllerian hormone receptor 2 (AMHR2) is an ovarian protein overexpressed in the majority of human EOCs. We have previously found...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research
CONCLUSION: In this review the pre-clinical evidence and current trials on NK cell immunotherapy in OC patients are summarized. Furthermore, challenges that have to be overcome for NK cell adoptive therapy to have a significant impact on disease outcome are discussed. PMID: 32268953 [PubMed - as supplied by publisher]
Source: Gynecologic Oncology - Category: Cancer & Oncology Authors: Tags: Gynecol Oncol Source Type: research
Cancer remains a leading cause of morbidity and mortality worldwide, requiring ongoing development of targeted therapeutics such as monoclonal antibodies. Carbohydrates on embryonic cells are often highly expressed in cancer and are therefore attractive targets for antibodies. Stage-specific embryonic antigen-4 (SSEA-4) is one such glycolipid target expressed in many cancers, including breast and ovarian carcinomas. Here, we defined the structural basis for recognition of SSEA-4 by a novel monospecific chimeric antibody (ch28/11). Five X-ray structures of ch28/11 Fab complexes with the SSEA-4 glycan headgroup, determined a...
Source: Journal of Biological Chemistry - Category: Chemistry Authors: Tags: Immunology Source Type: research
sen K Abstract Introduction: The aim of the present study was to investigate the prognostic impact of intratumoral cytotoxic T cells, Natural Killer (NK) cells, neutrophils and PD-L1 expression in patients with epithelial ovarian cancer.Methods: All patients diagnosed with high-grade serous carcinoma (HGSC) in Denmark in 2005 were included in the study. Immunohistochemical staining for PD-L1, CD8, CD66b and CD57 was performed on tumor tissue from 283 patients. Cell densities were analyzed using a digital image analysis method. The primary endpoint was overall survival (OS).Results: The median OS for HGSC patients ...
Source: Acta Oncologica - Category: Cancer & Oncology Authors: Tags: Acta Oncol Source Type: research
Publication date: Available online 3 January 2020Source: Seminars in Cancer BiologyAuthor(s): Kelly Olino, Tristen Park, Ntia AhujaAbstractAdvances in immunotherapy, most notably antibodies targeting the inhibitory immune receptors cytotoxic T-lymphocyte associated protein 4 (CTLA-4/CD152), programmed death protein 1 (PD-1/CD279) and programmed death-ligand 1 (PD-L1/B7H1/CD274) have become effective standard therapies in advanced malignancies including melanoma,1–4 merkel cell carcinoma5, urological cancers6–8, non-small cell lung cancer9–11, mis-match repair (MMR) deficient tumors12, and Hodgkin lymphoma...
Source: Seminars in Cancer Biology - Category: Cancer & Oncology Source Type: research
Authors: Flores I, Hevia D, Tittarelli A, Soto D, Rojas-Sepúlveda D, Pereda C, Tempio F, Fuentes C, Falcón-Beas C, Gatica J, Falcón-Beas F, Galindo M, Salazar-Onfray F, González FE, López MN Abstract Ovarian epithelial carcinoma (OEC) is the most frequent ovarian tumor, characterized by a high mortality in advanced stages where conventional therapies are not effective. Based on the role of the immune system in the progression of this disease, immunotherapy using checkpoint blockade has been considered as a therapeutic alternative. Nevertheless, its results do not match up to the p...
Source: Journal of Immunology Research - Category: Allergy & Immunology Tags: J Immunol Res Source Type: research
This study aimed to reveal the role of TEX19 in ovarian cancer (OC) and searched for potential candidate epitope peptides of TEX19 to facilitate clinical application.Main methodsTEX19 levels were evaluated by immunohistochemistry (IHC) in 98 human ovarian tissue samples. The correlation of TEX19 levels with patients' clinicopathological features was assessed. Quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting analysis were utilized to detect TEX19 levels in ovarian cell lines and TEX19-deficient cells. The level of TEX19 in OVCAR-3 and A2780 was knocked down by small interfering RNA (siRNA), an...
Source: Life Sciences - Category: Biology Source Type: research
ConclusionsBTLA detected in cancerous tissues can predict poor outcome of EOC patients. Inhibition of BTLA combined with chemotherapy can elevate immune activation and generate potent anti-tumor effects. Thus, the combination of chemotherapy and anti-BTLA antibody may hold potential clinical application for the treatment of EOC patients.Trial registrationThe Trial Registration Number wasNCT00854399.
Source: Journal for Immunotherapy of Cancer - Category: Cancer & Oncology Source Type: research
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