Poly Lactic-co-Glycolic Acid Nanoparticles Containing Human Gastric Tumor Lysates as Antigen Delivery Vehicles for Dendritic Cell-Based Antitumor Immunotherapy.

In this study, poly lactic-co-glycolic acid nanoparticles (NPs) were used as DC antigen delivery vehicles in a preclinical model of immunotherapy of gastric cancer. The DCs were generated from peripheral blood monocytes by conventional in vitro differentiation and loaded with either soluble tumor lysate or lysate encapsulated in NPs using a double emulsion/solvent evaporation technique. Morphology of NPs was determined by scanning electron microscopy. Tumor lysate, either in the soluble form or encapsulated in NPs, was loaded into DC and stimulatory capacity was compared using patient-derived autologous CD3+ T cells as responders. The amount of relevant cytokines produced by Ag-loaded DC and in DC/T cell cocultures was evaluated as a measure of initial DC stimulation and T-cell responses, respectively. Significance increases in expression of DC surface molecules (i.e., CD80, CD83, CD86, and Human Leukocyte Antigen-DR (HLA-DR)) and cytokine production by both DC and DC/T cell cocultures (i.e., interleukin (IL)-12:IL-10 and interferon [IFN]-γ:IL-4 ratios) was observed following loading with lysate NP versus controls. The results suggest that NP-encapsulated antigen can shift antitumor T-cell responses toward a Th1 bias, which potentially increases DC vaccine potency in clinical settings. PMID: 31094258 [PubMed - as supplied by publisher]
Source: Immunological Investigations - Category: Allergy & Immunology Tags: Immunol Invest Source Type: research

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Authors: Han J, Tu J, Tang C, Ma X, Huang C Abstract Background: Distant metastasis of early gastric cancer is a rare subgroup and poorly understood. The present study is aimed at summarizing the clinicopathological characteristics, prognosis, and management of clinical T1N0M1 (cT1N0M1) gastric cancer. Method: Between 2004 and 2015, patients diagnosed with cT1N0M1 gastric cancer were retrospectively analyzed using the Surveillance, Epidemiology, and End Results (SEER) database. Results: A total of 1093 cT1N0M1 gastric cancer patients were identified. 49 patients (4.5%) received cancer-directed surgery, and ...
Source: Disease Markers - Category: Laboratory Medicine Tags: Dis Markers Source Type: research
Conclusions: H. pylori screening for the adults 50 years of age and older could be cost-effective compared to UGI and endoscopy in high prevalence countries. The main reasons for the superiority of H. pylori screening are that an H. pylori antibody test has a higher sensitivity and specificity than UGI and endoscopy and the benefits to reduce gastric cancer incidence and mortality. PMID: 31190581 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Gastroenterology - Category: Gastroenterology Tags: Scand J Gastroenterol Source Type: research
Publication date: Available online 13 June 2019Source: Mutation Research/Genetic Toxicology and Environmental MutagenesisAuthor(s): Julie A. Cox, Paul A. WhiteAbstractThe mutagenicity of Direct Black 38, Sudan I, and Para Red were evaluated in the in vivo MutaMouse assay and the in vitro MutaMouse primary hepatocyte (PH) assay. Direct Black 38 is an International Agency for Research on Cancer (IARC) Group 1 carcinogen and a prototypical benzidine-based azo compound that requires azo-reduction to yield a DNA-reactive metabolite. Sudan I and Para Red are structurally related azo compounds that have been detected as illegal c...
Source: Mutation Research Genetic Toxicology and Environmental Mutagenesis - Category: Genetics & Stem Cells Source Type: research
Conclusion: In this study, a deformable vessel model based on FEM was constructed using preoperative CT images to improve matching accuracy and to supply a reference for further research on deformation matching to facilitate laparoscopic gastrectomy navigation. PMID: 31187660 [PubMed - as supplied by publisher]
Source: Minimally Invasive Therapy and Allied Technologies - Category: Surgery Tags: Minim Invasive Ther Allied Technol Source Type: research
Conclusions: The DFT method efficiently and safely facilitated the ESE procedure during the resection of gastric submucosal tumors. This study was registered with Chinese Clinical Trial Registry under Registration number ChiCTR-OOC-15005833). PMID: 31187025 [PubMed - in process]
Source: Canadian Journal of Gastroenterology - Category: Gastroenterology Tags: Can J Gastroenterol Hepatol Source Type: research
Authors: Xie R, Liu J, Yu X, Li C, Wang Y, Yang W, Hu J, Liu P, Sui H, Liang P, Huang X, Wang L, Bai Y, Xue Y, Zhu J, Fang T Abstract Annexin A2 (ANXA2) has been well known to associate with the progress of malignant tumor. However, the biological behavior of ANXA2 in gastric cancer (GC) remains unclear. We made a hypothesis in transcriptome level from TCGA datasets. Then, we used immunohistochemical staining to quantify the expression level of ANXA2 protein in GC tissues compared with adjacent tissues. Quantitative real-time PCR and western blot were used for analyzing ANXA2 expression in human GC (SGC-7901, MKN-4...
Source: Journal of Oncology - Category: Cancer & Oncology Tags: J Oncol Source Type: research
Authors: Al Diffalha S, Sexton KC, Watson PH, Grizzle WE Abstract Medical research advances enabling the realization of precision medicine have relied heavily on the biospecimens provided by bioresources to identify the targets and biomarkers that are the focus of the new generation of more effective molecular-based therapies for specific subtypes of diseases. Through the biospecimens they have distributed, bioresources have permitted subtypes of cancers to be identified and molecular features of these subtypes to be effectively targeted. A prototype example is the human epidermal growth factor receptor type 2 (HER...
Source: Biopreservation and Biobanking - Category: Biomedical Science Tags: Biopreserv Biobank Source Type: research
Abnormal expression of microRNAs (miRNAs) is related to human carcinogenesis. Although previous studies have shown that miR-503 expression in gastric cancer (GC) is downregulated, however, the underlying molec...
Source: Cancer Cell International - Category: Cancer & Oncology Authors: Tags: Primary research Source Type: research
AT-rich interactive domain-containing protein 1A (ARID1A) is a subunit of the mammary SWI/SNF chromatin remodeling complex and a tumor suppressor protein. The loss of ARID1A been observed in several types of h...
Source: Cancer Cell International - Category: Cancer & Oncology Authors: Tags: Primary research Source Type: research
Approval Based on Totality of Evidence Demonstrating KANJINTI is Biosimilar to Herceptin Third FDA Approval From Amgen's Biosimilars Portfolio THOUSAND OAKS, Calif., June 13, 2019 /PRNewswire/ -- Amgen (NASDAQ:AMGN) and Allergan plc (NYSE:AGN) today announced that the U.S. Food and Drug Administration (FDA) has approved KANJINTI™ (trastuzumab-anns) for all approved indications of the reference product, Herceptin® (trastuzumab):  for the treatment of HER2-overexpressing adjuvant and metastatic breast cancer and HER2-overexpressing metastatic gastric or gastroesophageal junction adenocarcinoma. "...
Source: Amgen News Release - Category: Pharmaceuticals Tags: Uncategorized Source Type: news
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