Glioma invasion and its interplay with nervous tissue and therapy: a multiscale model

Publication date: Available online 19 November 2019Source: Journal of Theoretical BiologyAuthor(s): Martina Conte, Luca Gerardo-Giorda, Maria GroppiAbstractA multiscale mathematical model for glioma cell migration and proliferation is proposed, taking into account a possible therapeutic approach. Starting with the description of processes occurring at the subcellular level, the equation for the mesoscopic level is formulated and a macroscopic model is derived, via parabolic limit and Hilbert expansions in the moment equations. After the model set up and the study of the well-posedness of this macroscopic setting, we investigate the role of the fibers in the tumor dynamics. In particular, we focus on the fiber density function, with the aim of comparing some common choices present in the literature and understanding which differences arise in the description of the actual fiber density and orientation. Finally, some numerical simulations, based on real data, highlight the role of each modelled process in the evolution of the solution of the macroscopic equation.
Source: Journal of Theoretical Biology - Category: Biology Source Type: research

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LncRNA AWPPH promotes the invasion and migration of glioma cells through the upregulation of HIF1α. Oncol Lett. 2019 Dec;18(6):6781-6786 Authors: Zhang T, Wang F, Liao Y, Yuan L, Zhang B Abstract Long non-coding RNA (lncRNA) AWPPH has been revealed to serve pivotal roles in bladder cancer and liver cancer. The aim of the present study was to determine the involvement of lncRNA AWPPH in glioma. It was observed in the present study that the expression levels of AWPPH in plasma were significantly higher in patients with metastatic glioma compared with those in patients with non-metastatic glioma and...
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research
Authors: Wang K, Huang R, Wu C, Li G, Zhao Z, Hu H, Liu Y Abstract Glioma is the most common type of malignant brain tumor, and is characterized by invasive growth and chemoradiotherapy resistance. The following Cancer Genome Atlas mutation subtypes were identified in initial high-grade gliomas and recurrent gliomas treated by chemoradiotherapy: Isocitrate dehydrogenase 1/2 (IDH1/2) mutation, epidermal growth factor receptor variant III (EGFRvIII) mutation, tumor protein P53 mutation, PTEN mutation, O6-methylguanine-DNA methyltransferase promoter methylation and telomerase reverse transcriptase (TERT) mutation. The...
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research
A 64-year-old man with a known case of right parietal lobe glioblastoma multiforme operated on in August 2018 was referred for 18F-FDG PET/CT with a clinical suspicion of recurrence. He underwent 18F-FDG and 18F-PSMA 1007 scans. Both the scans showed intense tracer uptake in right parietal lobe lesion, which concurred with MRI findings of recurrent disease and was later proven on histopathologic examination as recurrence. Our case highlights the feasibility of 18F-PSMA 1007 PET/CT imaging of suspected glioblastoma recurrence. Considering its similarity to PSMA-617, it may be used as a surrogate imaging tracer for potential...
Source: Clinical Nuclear Medicine - Category: Nuclear Medicine Tags: Interesting Images Source Type: research
Publication date: 15 February 2020Source: Journal of Molecular Structure, Volume 1202Author(s): Yun-Jia Hu, Yu-Ming Li, Kai Zheng, Wei-Hao Zhang, Yu-Li Liu, Hua YangAbstractA novel Zinc-based metal-organic framework [Zn2(OH)2(H2TCPP)](DMF)3 (1) was constructed by using a novel rigid symmetric tetracarboxylic connector, 2,3,5,6-tetrakis (4-carboxyphenyl)pyrazine (H4TCPP). The cross-linkage of Zn(II)-based 1D rod secondary building units (SBUs) with the H2TCPP2− ligands leads to the 3D channel structure of sea-type net with (6,8)-connected topology. Complex 1 not only exhibited the bright blue luminescence induced by H...
Source: Journal of Molecular Structure - Category: Molecular Biology Source Type: research
Forkhead box, class O, 1A (FOXO1A) is an important factor related to some human malignancies. We tested the association between FOXO1A cytoplasmic expression and World Health Organization grading system in primary brain tumors (PBTs). First of all, Western blot analysis was also performed in normal brain tissue and U87MG, LN229, GBM8401, and U118MG glioma cell lines protein lysates. Then, in order to realize FOXO1A gene expression in gliomas, U87MG, LN229, GBM8401 mRNA were applied to performed quantitative reverse transcription polymerase chain reaction (RT-PCR). At last, the immunohistochemical (IHC) analysis of FOXO1A w...
Source: Applied Immunohistochemistry and Molecular Morphology - Category: Chemistry Tags: Research Articles Source Type: research
Authors: Goodfellow JA, Mackay GA Abstract Autoimmune encephalitis is emerging as an important and relatively common cause of encephalitis in the developed world. Crucially, early recognition and prompt initiation of a range of immunotherapies is likely to improve the outcomes of patients with autoimmune encephalitis, particularly for those with identifiable antibodies against neuronal cell surface proteins. There are a rapidly growing number of specific autoantibodies and associated syndromes, but many of these remain very rare. The majority of cases comprise anti-N-methyl-D-aspartate (NMDA) receptor encephalitis ...
Source: Journal of the Royal College of Physicians of Edinburgh - Category: General Medicine Tags: J R Coll Physicians Edinb Source Type: research
Molecular studies have identified distinct genomic drivers providing insights in biology of brain tumors. Advances in genetic and epigenetic analysis, as well as development of mutation-specific antibodies enable more accurate classification of histologically indistinguishable tumors. Compared with histopathologic grading, molecular biomarkers are also superior in predicting natural behavior of tumors and therapeutic response. Diffuse gliomas can be separated in astrocytoma and oligodendroglioma based on IDH1/2, ATRX, and TP53 mutational status. Pediatric gliomas are molecularly distinct from adult tumors and molecular dri...
Source: Advances in Anatomic Pathology - Category: Pathology Tags: Review Articles Source Type: research
Sirtuin-1 (Sirt-1), an NAD-dependent deacetylase, promotes tumorigenesis in glioma; however, whether the Sirt-1 specific inhibitor, EX527 exerts antitumor effects and the underlying mechanism in glioma requires further investigation. In the present study, the proliferative and colony formation abilities of two glioma cell lines (U87MG and LN-299) were inhibited by EX527. Treatment with EX527 increased the number of apoptotic cells (Annexin V-fluorescein isothiocyanate+/propidium iodide+/−); pretreatment with the caspase inhibitor Z-VAD-FMK suppressed EX527-induced apoptosis, suggesting that EX527 induced caspase-depe...
Source: Anti-Cancer Drugs - Category: Cancer & Oncology Tags: Preclinical Reports Source Type: research
In this study, we first found that ibuprofen inhibited the viabilities of glioblastoma cells in vitro and in vivo, accompanied by abnormal increase in intracellular lipid peroxidation. Further study showed that the cell growth inhibition caused by ibuprofen could be rescued by the ferroptosis inhibitors deferoxamine (DFO), ferrostatin-1 and Liproxstatin-1. Nuclear factor erythroid 2-related factor 2 (Nrf2), glutathione peroxidase 4 (GPX4) and solute carrier family 7 member 11 (SLC7A11) are key regulators of ferroptosis. Our data showed that Nrf2, GPX4 and SLC7A11 were downregulated in glioblastoma cells under ibuprofen tre...
Source: Anti-Cancer Drugs - Category: Cancer & Oncology Tags: Preclinical Reports Source Type: research
CONCLUSIONS: Our study suggests that circ-SMAD7 promotes proliferation and metastasis of glioma via upregulating PCNA. Circ-SMAD7/ PCNA might be a novel therapeutic strategy in glioma. PMID: 31799673 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
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