scholarly journals The Association of Human Herpesviruses with Malignant Brain Tumor Pathology and Therapy: Two Sides of a Coin

2021 ◽  
Vol 22 (5) ◽  
pp. 2250
Author(s):  
Evita Athanasiou ◽  
Antonios N. Gargalionis ◽  
Fotini Boufidou ◽  
Athanassios Tsakris
Keyword(s):  
Brain Tumor ◽  
Brain Tumors ◽  
Comprehensive Evaluation ◽  
Tumor Development ◽  
Scientific Data ◽  
Malignant Brain Tumor ◽  
Direct Role ◽  
Tumor Pathology ◽  
Human Herpesviruses

The role of certain viruses in malignant brain tumor development remains controversial. Experimental data demonstrate that human herpesviruses (HHVs), particularly cytomegalovirus (CMV), Epstein–Barr virus (EBV) and human herpes virus 6 (HHV-6), are implicated in brain tumor pathology, although their direct role has not yet been proven. CMV is present in most gliomas and medulloblastomas and is known to facilitate oncomodulation and/or immunomodulation, thus promoting cancer cell proliferation, invasion, apoptosis, angiogenesis, and immunosuppression. EBV and HHV-6 have also been detected in brain tumors and high-grade gliomas, showing high rates of expression and an inflammatory potential. On the other hand, due to the neurotropic nature of HHVs, novel studies have highlighted the engagement of such viruses in the development of new immunotherapeutic approaches in the context of oncolytic viral treatment and vaccine-based strategies against brain tumors. This review provides a comprehensive evaluation of recent scientific data concerning the emerging dual role of HHVs in malignant brain pathology, either as potential causative agents or as immunotherapeutic tools in the fight against these devastating diseases.

Animal models for brain tumors: historical perspectives and future directions

1994 ◽  
Vol 80 (5) ◽  
pp. 865-876 ◽  
Author(s):  
Daniel L. Peterson ◽  
Peter J. Sheridan ◽  
Willis E. Brown
Keyword(s):  
Brain Tumor ◽  
Animal Models ◽  
Brain Tumors ◽  
Tumor Development ◽  
Laboratory Animals ◽  
Future Directions ◽  
Content Type ◽  
Historical Perspectives ◽  
Complex Process

✓ The scientific understanding of the biology of human brain tumors has advanced in large part through the use of animal models. For most of this century, investigators have been evaluating the inciting factors in brain tumor development, and applying this knowledge to direct tumor growth in laboratory animals. Virus-induced, carcinogen-induced, and transplant-based models have been vigorously investigated. As knowledge of the molecular biology of neoplasia has advanced, transgenic technology has been introduced. The authors review the development of animal models for brain tumor, and focus on the role of transgenic models in elucidating the complex process of central nervous system neoplasia.

scholarly journals Deleted in malignant brain tumor 1 is secreted in the oviduct and involved in the mechanism of fertilization in equine and porcine species

Reproduction ◽  
2013 ◽  
Vol 146 (2) ◽  
pp. 119-133 ◽  
Author(s):  
Barbara Ambruosi ◽  
Gianluca Accogli ◽  
Cécile Douet ◽  
Sylvie Canepa ◽  
Géraldine Pascal ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Western Blot ◽  
Immunohistochemical Analysis ◽  
Fertilization Rate ◽  
Malignant Brain Tumor ◽  
Estrus Cycle ◽  
Immunofluorescence Analysis ◽  
Oviductal Fluid ◽  
Porcine Spermatozoa

Oviductal environment affects preparation of gametes for fertilization, fertilization itself, and subsequent embryonic development. The aim of this study was to evaluate the effect of oviductal fluid and the possible involvement of deleted in malignant brain tumor 1 (DMBT1) on IVF in porcine and equine species that represent divergent IVF models. We first performed IVF after pre-incubation of oocytes with or without oviductal fluid supplemented or not with antibodies directed against DMBT1. We showed that oviductal fluid induces an increase in the monospermic fertilization rate and that this effect is canceled by the addition of antibodies, in both porcine and equine species. Moreover, pre-incubation of oocytes with recombinant DMBT1 induces an increase in the monospermic fertilization rate in the pig, confirming an involvement of DMBT1 in the fertilization process. The presence of DMBT1 in the oviduct at different stages of the estrus cycle was shown by western blot and confirmed by immunohistochemical analysis of ampulla and isthmus regions. The presence of DMBT1 in cumulus–oocyte complexes was shown by western blot analysis, and the localization of DMBT1 in the zona pellucida and cytoplasm of equine and porcine oocytes was observed using immunofluorescence analysis and confocal microscopy. Moreover, we showed an interaction between DMBT1 and porcine spermatozoa using surface plasmon resonance studies. Finally, a bioinformatic and phylogenetic analysis allowed us to identify the DMBT1 protein as well as a DMBT1-like protein in several mammals. Our results strongly suggest an important role of DMBT1 in the process of fertilization.

Brain Tumors

2016 ◽  
pp. 11-24 ◽  
Author(s):  
Chikezie Eseonu ◽  
Jordina Rincon-Torroella ◽  
Alfredo Quiñones-Hinojosa
Keyword(s):  
Brain Tumor ◽  
Brain Tumors ◽  
Demyelinating Disease ◽  
Brain Lesion ◽  
Pituitary Tumors ◽  
Current Treatment ◽  
Preoperative Care ◽  
Adult Brain ◽  
Surgical Approaches

Brain tumor cases make up a significant part of the neurosurgery Oral Board Exam. A multitude of brain tumors exist and can be intraaxial or extraaxial. When considering a differential diagnosis for a brain lesion, infection, hematomas, infarctions, thrombosed aneurysms, inflammation, and demyelinating disease must be considered in addition to tumors. Common adult brain tumors consist of gliomas, meningiomas, metastases, and pituitary tumors. Management of brain tumors consists of understanding preoperative care, indications for surgery, surgical approaches, interpretation of preoperative and postoperative imaging, intraoperative and postoperative complications, and the role of adjuvant therapy, including chemotherapy and radiotherapy. Reviewing these essential points for the most common brain tumor cases and mastering the current treatment recommendations for common tumors will also be helpful for the boards.

Role of Hospital Medicine in Management of Intracranial Brain Tumors

2019 ◽  
pp. 57-73
Author(s):  
Donald Y. Ye ◽  
Thana Theofanis ◽  
Tomas Garzon-Muvdi ◽  
James J. Evans
Keyword(s):  
Risk Factors ◽  
Brain Tumor ◽  
Postoperative Complications ◽  
Brain Tumors ◽  
Management Strategies ◽  
Hospital Medicine ◽  
Intracranial Tumors ◽  
Medical Oncologists ◽  
Insight Into

Intracranial tumors reflect a broad range of benign and malignant processes that are often managed by neurosurgeons and medical oncologists. Patients presenting with new brain tumors will undergo biopsies or resection for tissue diagnosis and resolution of neurological symptoms. These patients have significant perioperative risk factors that must be addressed to ensure the best possible outcomes. Hospitalists play a pivotal role in identifying these risk factors and offering management strategies prior to the development of an operative plan. This chapter provides insight into the range of preoperative considerations and postoperative complications that a hospitalist may face when managing brain tumor patients.

scholarly journals Increasing Evidence for Involvement of SV40 in Human Cancer

2001 ◽  
Vol 17 (3) ◽  
pp. 167-172 ◽  
Author(s):  
Janet S. Butel
Keyword(s):  
Brain Tumors ◽  
Functional Role ◽  
Human Cancer ◽  
Tumor Development ◽  
Human Tumor ◽  
Dna Virus ◽  
Oncogenic Potential ◽  
Tumor Virus ◽  
Human Infections

SV40, a small DNA virus, is known to possess strong oncogenic potential. Millions of people were exposed to SV40 as an unknown contaminant of some early poliovaccines. This article briefly summarizes the increasing evidence of the association of SV40 with certain types of human cancer, including mesotheliomas and brain tumors. Unanswered questions pertaining to the pathogenesis of human infections by SV40 and the functional role of the virus in tumor development are noted. It is concluded that SV40 should be considered a candidate human tumor virus and that vigorous efforts to clarify the role of the virus in human disease should be supported.

scholarly journals OMIC-13. THE ROLE OF COPY NUMBER ALTERATIONS IN PREDICTING SURVIVAL AND INFLUENCING TREATMENT OF CHILDHOOD BRAIN TUMORS

2021 ◽  
Vol 23 (Supplement_1) ◽  
pp. i40-i40
Author(s):  
Sharon Freshour ◽  
Bryan Fisk ◽  
Christopher Miller ◽  
Obi Griffith ◽  
Malachi Griffith ◽  
...  
Keyword(s):  
Overall Survival ◽  
Brain Tumor ◽  
Brain Tumors ◽  
Copy Number ◽  
Statistical Power ◽  
Pediatric Brain Tumor ◽  
Copy Number Alterations ◽  
Childhood Brain Tumors ◽  
Entire Cohort

Abstract Brain and central nervous system tumors are the most common form of solid tumor cancers and the second most common cancer overall among children. While many advances have been made in understanding the genomics of childhood brain tumors in recent years, the role of copy number alterations (CNAs) has not been fully characterized. Although the genomes of childhood brain tumor patients are generally considered to be relatively stable diploid genomes, analysis of a subset of pretreatment diagnostic samples from a cohort of 84 deceased patients from Washington University revealed widespread alterations, suggesting CNAs may play a larger role in the progression and prognosis of childhood brain tumors than originally thought. Follow up analysis of the entire cohort, containing a variety of tumor types that had low-pass whole genome sequencing performed, similarly showed evidence of CNAs across samples. 75 out 84 patients showed the presence of CNAs with an average of 16% of the genome being altered per sample and a median of 7%. Preliminary results examining correlations between the percentage of the genome that was copy number altered and event free survival or overall survival indicated that CNA percentage may have some prognostic value. For example, ependymoma samples showed positive correlation between alteration percentage and overall survival, while glioblastoma samples showed negative correlation. To explore copy number alteration in a larger cohort and increase statistical power, similar analyses are being performed using an additional 950 samples from the Pediatric Brain Tumor Atlas curated by The Children’s Brain Tumor Network (CBTN) to determine if CNVs and CNV percentage or specific alterations can serve as prognostic markers and whether the biology of this genomic instability could inform therapeutic strategy.

scholarly journals The Role of Neurodevelopmental Pathways in Brain Tumors

2021 ◽  
Vol 9 ◽  
Author(s):  
Rachel N. Curry ◽  
Stacey M. Glasgow
Keyword(s):  
Brain Tumor ◽  
Brain Tumors ◽  
Disease Progression ◽  
Adult Brain ◽  
Signaling Cascades ◽  
Tumor Initiation ◽  
Developmental Factors ◽  
Developmental Signaling ◽  
Cell Signaling Pathways

Disruptions to developmental cell signaling pathways and transcriptional cascades have been implicated in tumor initiation, maintenance and progression. Resurgence of aberrant neurodevelopmental programs in the context of brain tumors highlights the numerous parallels that exist between developmental and oncologic mechanisms. A deeper understanding of how dysregulated developmental factors contribute to brain tumor oncogenesis and disease progression will help to identify potential therapeutic targets for these malignancies. In this review, we summarize the current literature concerning developmental signaling cascades and neurodevelopmentally-regulated transcriptional programs. We also examine their respective contributions towards tumor initiation, maintenance, and progression in both pediatric and adult brain tumors and highlight relevant differentiation therapies and putative candidates for prospective treatments.

scholarly journals New Hope in Brain Glioma Surgery: The Role of Intraoperative Ultrasound. A Review

2018 ◽  
Vol 8 (11) ◽  
pp. 202 ◽  
Author(s):  
Maria Pino ◽  
Alessia Imperato ◽  
Irene Musca ◽  
Rosario Maugeri ◽  
Giuseppe Giammalva ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Brain Tumors ◽  
Low Cost ◽  
Tumor Resection ◽  
Intraoperative Ultrasound ◽  
Tumor Surgery ◽  
Brain Tumor Surgery ◽  
Glioma Surgery ◽  
Pubmed Database

Maximal safe resection represents the gold standard for surgery of malignant brain tumors. As regards gross-total resection, accurate localization and precise delineation of the tumor margins are required. Intraoperative diagnostic imaging (Intra-Operative Magnetic Resonance-IOMR, Intra-Operative Computed Tomography-IOCT, Intra-Operative Ultrasound-IOUS) and dyes (fluorescence) have become relevant in brain tumor surgery, allowing for a more radical and safer tumor resection. IOUS guidance for brain tumor surgery is accurate in distinguishing tumor from normal parenchyma, and it allows a real-time intraoperative visualization. We aim to evaluate the role of IOUS in gliomas surgery and to outline specific strategies to maximize its efficacy. We performed a literature research through the Pubmed database by selecting each article which was focused on the use of IOUS in brain tumor surgery, and in particular in glioma surgery, published in the last 15 years (from 2003 to 2018). We selected 39 papers concerning the use of IOUS in brain tumor surgery, including gliomas. IOUS exerts a notable attraction due to its low cost, minimal interruption of the operational flow, and lack of radiation exposure. Our literature review shows that increasing the use of ultrasound in brain tumors allows more radical resections, thus giving rise to increases in survival.

scholarly journals Novel Perspectives on p53 Function in Neural Stem Cells and Brain Tumors

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Sanna-Maria Hede ◽  
Inga Nazarenko ◽  
Monica Nistér ◽  
Mikael S. Lindström
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Brain Tumor ◽  
Brain Tumors ◽  
Neural Stem Cells ◽  
Tumor Development ◽  
Suppressor Gene ◽  
Tumor Stem Cell ◽  
Growth Factor Signaling ◽  
Induce Cell Cycle Arrest

Malignant glioma is the most common brain tumor in adults and is associated with a very poor prognosis. Mutations in the p53 tumor suppressor gene are frequently detected in gliomas. p53 is well-known for its ability to induce cell cycle arrest, apoptosis, senescence, or differentiation following cellular stress. That the guardian of the genome also controls stem cell self-renewal and suppresses pluripotency adds a novel level of complexity to p53. Exactly how p53 works in order to prevent malignant transformation of cells in the central nervous system remains unclear, and despite being one of the most studied proteins, there is a need to acquire further knowledge about p53 in neural stem cells. Importantly, the characterization of glioma cells with stem-like properties, also known as brain tumor stem cells, has opened up for the development of novel targeted therapies. Here, we give an overview of what is currently known about p53 in brain tumors and neural stem cells. Specifically, we review the literature regarding transformation of adult neural stem cells and, we discuss how the loss of p53 and deregulation of growth factor signaling pathways, such as increased PDGF signaling, lead to brain tumor development. Reactivation of p53 in brain tumor stem cell populations in combination with current treatments for glioma should be further explored and may become a viable future therapeutic approach.

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