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Recent advances in adenovirus-mediated gene therapy for cerebral ischemia
1Suntory Biomedical Research Limited, 1-1-1, Wakayama-dai, Shimamoto-cho, Mishima-gun, Osaka 618-8503, Japan. Makoto_Masumura@suntory.co.jp
Abstract:
Cerebral ischemia induces many degenerative cellular reactions, including the release of excitatory amino acids, the formation of oxygen free radicals, Ca2+ overload, the activation of several cellular enzyme systems such as Ca2+ dependent proteases, and the initiation or genomic responses that can affect the tissue outside the area of reduced blood flow. Furthermore, increasing evidence indicates that apoptosis contributes to the death of brain cells following cerebral ischemia. Several studies have shown that cerebral ischemia alters the expression of genes, some of which may play protective or harmful roles. Although many genes have the potential to treat cerebral ischemia, target genes or their translated products are often difficult to express, if at all, in brain cells. However, adenovirus-mediated gene transfer can overcome this disadvantage. To date, many treatment strategies have been developed for cerebral ischemia using target genes such as neuronal apoptosis inhibitory protein (NAIP), glial cell line-derived neurotrophic factor (GDNF), sensitive to apoptosis gene (SAG), 150-kDa oxygen-regulated protein (ORP150), etc. Moreover, new vectors and gene delivery systems are constantly being invented although there is no perfect vector to date. Gene therapy could constitute a powerful strategy to treat cerebral ischemia in the near future.
Insights
Gene therapy offers a promising future for treating cerebral ischemia by overcoming challenges in delivering therapeutic genes to brain cells. Adenovirus-mediated gene transfer is a key technique for delivering genes like NAIP and GDNF to combat brain cell death.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Cerebral ischemia triggers damaging cellular processes, including excitotoxicity, oxidative stress, and calcium overload.
- Apoptosis (programmed cell death) plays a significant role in brain cell demise following ischemic events.
- Gene expression alterations occur after cerebral ischemia, with some genes potentially offering protection and others exacerbating damage.
Purpose of the Study:
- To explore the potential of gene therapy as a treatment strategy for cerebral ischemia.
- To address the challenge of delivering therapeutic genes and their products effectively to brain cells.
- To review existing and emerging gene therapy approaches for cerebral ischemia.
Main Methods:
- Review of existing literature on cellular mechanisms of cerebral ischemia.
- Analysis of gene therapy strategies utilizing adenovirus-mediated gene transfer.
- Examination of various target genes and neuroprotective factors (e.g., NAIP, GDNF, SAG, ORP150).
Main Results:
- Cerebral ischemia induces complex cellular damage, including apoptosis.
- Gene expression changes post-ischemia can be protective or detrimental.
- Adenovirus-mediated gene transfer shows promise for delivering therapeutic genes to brain cells, overcoming delivery limitations.
Conclusions:
- Gene therapy presents a powerful future strategy for treating cerebral ischemia.
- Effective delivery of therapeutic genes to brain cells remains a critical challenge being addressed by novel vectors and systems.
- Ongoing advancements in gene therapy vectors hold significant potential for mitigating brain damage from cerebral ischemia.