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Updated: Feb 10, 2026

Quantitative Immunohistochemistry of the Cellular Microenvironment in Patient Glioblastoma Resections
Published on: July 31, 2017
Natural products: a hope for glioblastoma patients
Raghupathy Vengoji1, Muzafar A Macha1,2, Surinder K Batra1,3
1Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198, USA.
Abstract:
Glioblastoma (GBM) is one of the most aggressive malignant tumors with an overall dismal survival averaging one year despite multimodality therapeutic interventions including surgery, radiotherapy and concomitant and adjuvant chemotherapy. Few drugs are FDA approved for GBM, and the addition of temozolomide (TMZ) to standard therapy increases the median survival by only 2.5 months. Targeted therapy appeared promising in in vitro monolayer cultures, but disappointed in preclinical and clinical trials, partly due to the poor penetration of drugs through the blood brain barrier (BBB). Cancer stem cells (CSCs) have intrinsic resistance to initial chemoradiation therapy (CRT) and acquire further resistance via deregulation of many signaling pathways. Due to the failure of classical chemotherapies and targeted drugs, research efforts focusing on the use of less toxic agents have increased. Interestingly, multiple natural compounds have shown antitumor and apoptotic effects in TMZ resistant and p53 mutant GBM cell lines and also displayed synergistic effects with TMZ. In this review, we have summarized the current literature on natural products or product analogs used to modulate the BBB permeability, induce cell death, eradicate CSCs and sensitize GBM to CRT.
Insights
Natural compounds show promise in treating glioblastoma (GBM). These agents can overcome drug resistance, enhance chemotherapy effectiveness, and target cancer stem cells, offering new hope for this aggressive brain tumor.
Area of Science:
- Oncology
- Neuro-oncology
- Pharmacology
Background:
- Glioblastoma (GBM) is a highly aggressive brain tumor with poor patient survival, often averaging only one year.
- Current treatments like surgery, radiotherapy, and chemotherapy, including temozolomide (TMZ), offer limited survival benefits.
- Drug delivery to the brain is hindered by the blood-brain barrier (BBB), and glioblastoma stem cells (CSCs) exhibit intrinsic resistance to therapy.
Purpose of the Study:
- To review the potential of natural products and their analogs in overcoming GBM treatment challenges.
- To explore how natural compounds can enhance BBB penetration, induce cancer cell death, and eradicate CSCs.
- To summarize evidence on natural agents sensitizing GBM to chemoradiation therapy (CRT).
Main Methods:
- Literature review of studies on natural products and GBM.
- Analysis of research investigating natural compounds' effects on BBB permeability.
- Evaluation of studies on natural products' impact on CSCs and GBM cell death.
- Assessment of natural compounds' synergistic effects with TMZ and CRT.
Main Results:
- Natural compounds demonstrate antitumor and apoptotic effects in GBM cell lines, including TMZ-resistant and p53 mutant variants.
- Some natural products show potential in modulating BBB permeability for improved drug delivery.
- Evidence suggests natural agents can target CSCs and sensitize GBM to standard therapies like CRT.
Conclusions:
- Natural products and their analogs represent a promising avenue for novel GBM therapies.
- These compounds may overcome chemoresistance, target CSCs, and improve drug delivery across the BBB.
- Further research into natural products could lead to less toxic and more effective treatments for glioblastoma.
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