In this study, we investigated whether the expression of matrix metalloproteinase (MMP)-2 and MMP-9 correlated with invasiveness, proliferative potential, or prognosis in astrocytic tumors. Thirty-seven astrocytic tumors (8 diffuse astrocytomas, 15 anaplastic astrocytomas, and 14 glioblastomas) and three gliomatosis cerebri were investigated immunohistochemically. The invasive glioma group included three cases of gliomatosis cerebri and two of glioblastoma associated with cerebrospinal fluid dissemination. The expression of MMP-2 and MMP-9 was evaluated by assigning an immunohistochemical (IHC) score defined as the sum of expression frequency and intensity. mRNA expression patterns for the MMPs were also evaluated in a reverse transcription-polymerase chain reaction assay. Neither the MMP-2 nor MMP-9 IHC score was related to histological malignancy. The MMP-2 IHC score of the invasive glioma group was significantly higher than those of other kinds of astrocytic tumors. However, the MMP-9 IHC score did not correlate with dissemination among astrocytic tumors. An inverse correlation was observed between the MIB-1 labeling index and the IHC scores of MMP-2, but it was not significant. A Kaplan-Meyer survival analysis revealed no significant relationship between the survival rate and MMP-2 or MMP-9 expression. Our study showed that MMP-2 expression, but not MMP-9 expression, may be associated with invasion in astrocytic tumors.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/BF02483445 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The dual role of calnexin on malignant progression and tumor microenvironment in glioma.
Sci Rep
December 2024
National Engineering Research Center for Miniaturized Detection Systems, College of Life Sciences, Northwest University, Xi'an, Shaanxi, China.
Glioma is the most common malignant brain tumor. Previous studies have reported that calnexin (CANX) is significantly up-regulated in a variety of malignant tumors, including glioma, but its biological function and mechanism in glioma is still unclear. In this study, differentially expressed proteins in 3 primary glioblastoma multiforme (GBM) tissues and 3 paracancer tissues were identified by liquid chromatography-tandem mass spectrometry-based proteomic and bioinformatic analysis.
View Article and Find Full Text PDFHearing modulation affects Alzheimer's disease progression linked to brain inflammation: a study in mouse models.
Mol Med
December 2024
Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, 42 Jaebong-Ro, Dong-Gu, Gwangju, 61469, Republic of Korea.
Background: Recent studies have identified hearing loss (HL) as a primary risk factor for Alzheimer's disease (AD) onset. However, the mechanisms linking HL to AD are not fully understood. This study explored the effects of drug-induced hearing loss (DIHL) on the expression of proteins associated with AD progression in mouse models.
View Article and Find Full Text PDFNervous system contributions to small cell lung cancer: Lessons from diverse oncological studies.
Biochim Biophys Acta Rev Cancer
December 2024
Thoracic Oncology Ward, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China; Department of Radiotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, China; Laboratory of Clinical Cell Therapy, West China Hospital, Sichuan University, Chengdu, China. Electronic address:
The nervous system plays a vital role throughout the entire lifecycle and it may regulate the formation, development and metastasis of tumors. Small cell lung cancer is a typical neuroendocrine tumor, and it is naturally equipped with neurotropism. In this review, we firstly summarize current preclinical and clinical evidence to demonstrate the reciprocal crosstalk among the nervous system, tumor, and tumor microenvironment in various ways, including neurotransmitter-receptor pathways, innervations of nerve fibers, different types of synapse formation by neurons, astrocytes, and cancer cells, neoneurogenesis.
View Article and Find Full Text PDFComprehensive Analysis of Bulk RNA-Seq and Single-Cell RNA-Seq Data Unveils Sevoflurane-Induced Neurotoxicity Through SLC7A11-Associated Ferroptosis.
J Cell Mol Med
December 2024
Department of Critical Care Medicine, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, P. R. China.
Sevoflurane's potential impact on cognitive function and neurodevelopment, especially in susceptible populations such as infants and the elderly, has raised widespread concern. This study focuses on how sevoflurane induces ferroptosis in astrocytes and identifies solute carrier family 7 member 11 (SLC7A11) as a mediator of ferroptosis, providing new insights into sevoflurane-related neurotoxic pathways. We analysed single-cell sequencing (scRNA-seq) data from sevoflurane-exposed mice and control mice, supplemented with bulk RNA-seq data, to assess gene expression alterations.
View Article and Find Full Text PDFPathological mechanisms of glial cell activation and neurodegenerative and neuropsychiatric disorders caused by infection.
Front Microbiol
December 2024
Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Diseases Research, School of Public Health, Key Laboratory of Infectious Diseases Research in South China (Southern Medical University), Ministry of Education, Southern Medical University, Guangzhou, Guangdong, China.
is an intracellular opportunistic parasite that exists in a latent form within the human central nervous system (CNS), even in immune-competent hosts. During acute infection, traverses the blood-brain barrier (BBB). In the subsequent chronic infection phase, the infiltration of immune cells into the brain, driven by infection and the formation of parasitic cysts, leads to persistent activation and proliferation of astrocytes and microglia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!