AI Article Synopsis
- The blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB) limit the effectiveness of chemotherapy for treating gliomas, necessitating a drug delivery system that can target glioma cells specifically while reducing overall toxicity.
- Researchers identified high expression of glucose-regulated protein 78 (GRP78) and dopamine receptor D2 in glioma tissues, and synthesized a "Y"-shaped peptide to enhance drug affinity and targeting capability.
- The developed peptide-drug conjugate (pHA-AOHX-VAP-DOX) effectively crossed the BBB and BBTB, targeted glioma cells, improved survival in animal models, and reduced the side effects of the chemotherapy drug doxorubicin (DOX
Article Abstract
The existence of the blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB) greatly limits the application of chemotherapy in glioma. To address this challenge, an optimal drug delivery system must efficiently cross the BBB/BBTB and specifically deliver therapeutic drugs into glioma cells while minimizing systemic toxicity. Here we demonstrated that glucose-regulated protein 78 (GRP78) and dopamine receptor D2 were highly expressed in patient-derived glioma tissues, and dopamine receptors were highly expressed on the BBB. Subsequently, we synthesized a novel "Y"-shaped peptide and compared the effects of different linkers on the receptor affinity and targeting ability of the peptide. A peptide-drug conjugate (pHA-AOHX-VAP-doxorubicin conjugate, pHA-AOHX-VAP-DOX) with a better affinity for glioma cells and higher solubility was derived for glioma treatment. pHA-AOHX-VAP-DOX could cross both BBB and BBTB via dopamine receptor and GRP78 receptor, and finally target glioma cells, significantly prolonging the survival time of nude mice bearing intracranial glioma. Furthermore, pHA-AOHX-VAP-DOX significantly reduced the toxicity of DOX and increased the maximum tolerated dose (MTD). Collectively, this work paves a new avenue for overcoming multiple barriers and effectively delivering chemotherapeutic agents to glioma cells while providing key evidence to identify potential receptors for glioma-targeted drug delivery.
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| http://dx.doi.org/10.1016/j.jconrel.2024.04.011 | DOI Listing |
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