scholarly journals High levels of ubidecarenone (oxidized CoQ10) delivered using a drug-lipid conjugate nanodispersion (BPM31510) differentially affect redox status and growth in malignant glioma versus non-tumor cells

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiaxin Sun ◽  
Chirag B. Patel ◽  
Taichang Jang ◽  
Milton Merchant ◽  
Chen Chen ◽  
...  
Keyword(s):  
Malignant Glioma ◽  
Tumor Cells ◽  
Redox Status ◽  
Lipid Conjugate

scholarly journals Preliminary Report: Rapid Intraoperative Detection of Residual Glioma Cell in Resection Cavity Walls Using a Compact Fluorescence Microscope

2021 ◽  
Vol 10 (22) ◽  
pp. 5375
Author(s):  
Jiro Akimoto ◽  
Shinjiro Fukami ◽  
Megumi Ichikawa ◽  
Kenta Nagai ◽  
Michihiro Kohno
Keyword(s):  
Tumor Cell ◽  
Malignant Glioma ◽  
Tumor Cells ◽  
Malignant Gliomas ◽  
Glioma Cells ◽  
Fluorescence Microscope ◽  
Talaporfin Sodium ◽  
Surgical Microscope ◽  
Resection Cavity ◽  
Intraoperative Detection

Objective: The surgical eradication of malignant glioma cells is theoretically impossible. Therefore, reducing the number of remaining tumor cells around the brain–tumor interface (BTI) is crucial for achieving satisfactory clinical results. The usefulness of fluorescence–guided resection for the treatment of malignant glioma was recently reported, but the detection of infiltrating tumor cells in the BTI using a surgical microscope is not realistic. Therefore, we have developed an intraoperative rapid fluorescence cytology system, and exploratorily evaluated its clinical feasibility for the management of malignant glioma. Materials and methods: A total of 25 selected patients with malignant glioma (newly diagnosed: 17; recurrent: 8) underwent surgical resection under photodiagnosis using photosensitizer Talaporfin sodium and a semiconductor laser. Intraoperatively, a crush smear preparation was made from a tiny amount of tumor tissue, and the fluorescence emitted upon 620/660 nm excitation was evaluated rapidly using a compact fluorescence microscope in the operating theater. Results: Fluorescence intensities of tumor tissues measured using a surgical microscope correlated with the tumor cell densities of tissues evaluated by measuring the red fluorescence emitted from the cytoplasm of tumor cells using a fluorescence microscope. A “weak fluorescence” indicated a reduction in the tumor cell density, whereas “no fluorescence” did not indicate the complete eradication of the tumor cells, but indicated that few tumor cells were emitting fluorescence. Conclusion: The rapid intraoperative detection of fluorescence from glioma cells using a compact fluorescence microscope was probably useful to evaluate the presence of tumor cells in the resection cavity walls, and could provide surgical implications for the more complete resection of malignant gliomas.

scholarly journals Oncolytic adenoviral therapy for glioblastoma multiforme

2006 ◽  
Vol 20 (4) ◽  
pp. E19 ◽  
Author(s):  
Adam M. Sonabend ◽  
Ilya V. Ulasov ◽  
Yu Han ◽  
Maciej S. Lesniak
Keyword(s):  
Gene Therapy ◽  
Brain Tumor ◽  
Glioblastoma Multiforme ◽  
Malignant Glioma ◽  
Tumor Cells ◽  
Human Gene ◽  
Relative Lack ◽  
Human Gene Therapy

Adenoviruses historically have been one of the main vectors used in human gene therapy. To date, the majority of brain tumor trials of these vectors have used replication-defective viruses. The relative lack of success obtained with replication-defective vectors has prompted a search for new and improved therapies. In this context, oncolytic (conditionally replicative) adenoviruses, which selectively bind and replicate only in tumor cells, have gained increasing importance. These adenoviruses, once they are rendered conditionally replicative by transductional and transcriptional modifications, offer significant promise for patients with malignant glioma. In this review, the authors discuss the genetic approaches to adenoviral modification and their applications in the field of neurooncology.

Superficial location of malignant glioma with heavily lipidized (foamy) tumor cells: A case report

1989 ◽  
Vol 7 (3) ◽  
Author(s):  
Kimito Tanaka ◽  
Shiro Waga ◽  
Hiroji Itho ◽  
DavidM. Shimizu ◽  
Hideo Namiki
Keyword(s):  
Case Report ◽  
Malignant Glioma ◽  
Tumor Cells

scholarly journals Rapid Intraoperative Detection of Residual Glioma Cell in Resection Cavity Walls Using a Compact Fluorescence Microscope

2021 ◽  
Author(s):  
Jiro Akimoto ◽  
shinjiro Fukami ◽  
Megumi Ichikawa ◽  
Kenta nagai ◽  
Michihiro Kohno
Keyword(s):  
Tumor Cell ◽  
Malignant Glioma ◽  
Tumor Cells ◽  
Malignant Gliomas ◽  
Glioma Cells ◽  
Fluorescence Microscope ◽  
Talaporfin Sodium ◽  
Surgical Microscope ◽  
Resection Cavity ◽  
Intraoperative Detection

Objective: Surgical eradication of malignant glioma cells is theoretically impossible. Therefore, reducing the number of remaining tumor cells around the brain-tumor interface (BTI) is crucial for achieving satisfactory clinical results. The usefulness of fluorescence-guided resection for the treatment of malignant glioma was recently reported, but the detection of infiltrating tumor cells in the BTI using a surgical microscope is not realistic. Therefore, we developed an intraoperative rapid fluorescence cytology system, and evaluated its clinical feasibility for the management of malignant glioma. Materials and methods: Twenty-five selected patients with malignant glioma (newly diagnosed: 17; recurrent: 8) underwent surgical resection under photodiagnosis using photosensitizer Talaporfin sodium and a semiconductor laser. Intraoperatively, a crush smear preparation was made from a tiny amount of tumor tissue, and the fluorescence emitted upon 620/660 nm excitation was evaluated rapidly using a compact fluorescence microscope in the operating theater. Results: Fluorescence intensities of tumor tissues measured using a surgical microscope correlated with the tumor cell densities of tissues evaluated by measuring the red fluorescence emitted from the cytoplasm of tumor cells using a fluorescence microscope. A “weak fluorescence” indicated a reduction in the tumor cell density, whereas “no fluorescence” did not indicate the complete eradication of the tumor cells, but indicated that few tumor cells were emitting fluorescence.Conclusion: The rapid intraoperative detection of fluorescence from glioma cells using a compact fluorescence microscope was a useful to evaluate the presence of tumor cells in the resection cavity walls, and provides surgical implications for the more complete resection of malignant gliomas.

scholarly journals Progress on Antiangiogenic Therapy for Patients with Malignant Glioma

2010 ◽  
Vol 2010 ◽  
pp. 1-14 ◽  
Author(s):  
Manmeet S. Ahluwalia ◽  
Candece L. Gladson
Keyword(s):  
Malignant Glioma ◽  
Tumor Cells ◽  
Antiangiogenic Therapy ◽  
Primary Brain Tumor ◽  
Targeted Prevention ◽  
Ongoing Research ◽  
Development Of Resistance ◽  
Show Evidence ◽  
Angiogenesis Process ◽  
Glioma Tumors

Glioblastoma (GBM) is the most common primary brain tumor occurring in America. Despite recent advances in therapeutics, the prognosis for patients with newly diagnosed GBM remains dismal. As these tumors characteristically show evidence of angiogenesis (neovascularization) there has been great interest in developing anti-angiogenic therapeutic strategies for the treatment of patients with this disease and some anti-angiogenic agents have now been used for the treatment of patients with malignant glioma tumors. Although the results of these clinical trials are promising in that they indicate an initial therapeutic response, the anti-angiogenic therapies tested to date have not changed the overall survival of patients with malignant glioma tumors. This is due, in large part, to the development of resistance to these therapies. Ongoing research into key features of the neovasculature in malignant glioma tumors, as well as the general angiogenesis process, is suggesting additional molecules that may be targeted and an improved response when both the neovasculature and the tumor cells are targeted. Prevention of the development of resistance may require the development of anti-angiogenic strategies that induce apoptosis or cell death of the neovasculature, as well as an improved understanding of the potential roles of circulating endothelial progenitor cells and vascular co-option by tumor cells, in the development of resistance.

Membranous alterations in the cytoplasm and nucleus in a primitive neuroectodermal tumor of the brain

1978 ◽  
Vol 36 (2) ◽  
pp. 628-629
Author(s):  
C. N. Sun ◽  
C. Araoz ◽  
H. J. White
Keyword(s):  
Nuclear Envelope ◽  
Tumor Cells ◽  
Osmium Tetroxide ◽  
Primitive Neuroectodermal Tumor ◽  
Uranyl Acetate ◽  
Neuroectodermal Tumor ◽  
Annulate Lamellae ◽  
Lead Citrate ◽  
Thin Sections ◽  
The Brain

The ultrastructure of a cerebral primitive neuroectodermal tumor has been reported previously. In the present case, we will present some unusual previously unreported membranous structures and alterations in the cytoplasm and nucleus of the tumor cells.Specimens were cut into small pieces about 1 mm3 and immediately fixed in 4% glutaraldehyde in phosphate buffer for two hours, then post-fixed in 1% buffered osmium tetroxide for one hour. After dehydration, tissues were embedded in Epon 812. Thin sections were stained with uranyl acetate and lead citrate.In the cytoplasm of the tumor cells, we found paired cisternae (Fig. 1) and annulate lamellae (Fig. 2) noting that the annulate lamellae were sometimes associated with the outer nuclear envelope (Fig. 3). These membranous structures have been reported in other tumor cells. In our case, mitochondrial to nuclear envelope fusions were often noted (Fig. 4). Although this phenomenon was reported in an oncocytoma, their frequency in the present study is quite striking.

Ulcerogenic Tumors of the Pancreas

1968 ◽  
Vol 26 ◽  
pp. 186-187
Author(s):  
J. C. Garancis ◽  
J. F. Kuzma ◽  
S. D. Wilson ◽  
E. H. Ellison
Keyword(s):  
Endoplasmic Reticulum ◽  
Tumor Cells ◽  
Islet Cell ◽  
Disease Process ◽  
Central Core ◽  
Islet Cell Tumors ◽  
Opaque Zone ◽  
Granular Form ◽  
Zollinger Ellison Syndrome

It has been proposed that a gastrin-like hormone elaborated by non-beta islet tumors of the pancreas may be responsible for a fulminating ulcer diathesis. Subsequently, a potent gastric secretagogue was isolated from ulcerogenic tumors of the pancreas. This disease process is known now as “Zollinger-Ellison syndrome”.In our studies of two cases of Zollinger-Ellison syndrome, pancreatic lesions were identified as alpha islet cell tumors (Fig. 1). Tumor cells were fairly uniform. The sizes of the alpha granules were not significantly different, but their number and distribution varied greatly from one cell to another. Each granule consisted of a round, highly dense central core, separated from the limiting membrane by an opaque zone. The granular form of the endoplasmic reticulum was particularly prominent. Numerous mitochondria, round or elongated, were dispersed throughout the cytoplasm. Individual or clusters of lysosomes were observed in the majority of cells.

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