Laminin Receptor-Mediated Nanoparticle Uptake by Tumor Cells: Interplay of Epigallocatechin Gallate and Magnetic Force at Nano–Bio Interface

YIGSR Functionalized Hybrid Exosomes Spatially Target Dasatinib to Laminin Receptors for Precision Therapy in Breast Cancer

In this study, YIGSR-functionalized exosomes (Exo) are engineered and hybridized with lipid polymeric nanoparticles (LPNPs) followed by loading of chemotherapy Dasatinib (DST) to spatially target laminin receptors on tumors. Exo derived from differentiated macrophages are engineered with YIGSR targeting peptides.These YIGSR-Exo are subsequently fused with LPNPs membranes using the freeze-thaw method, resulting in fused hybrid YIGSR-Exo, which are then loaded with DST, creating DST-FuNP@YIGSR-Exo and targeted breast cancer (BC), leading to enhanced mitochondrial membrane potential (54.50 ±5.0%), increased reactive oxygen species (59.50 ± 6.0%), and apoptosis (63 ± 6.5%), ultimately inducing cell death. Further, cellular uptake and receptor blocking studies confirm the binding affinity and interaction of DST-FuNP@YIGSR-Exo with laminin receptors, Intravenous pharmacokinetic analysis of DST-FuNP@YIGSR-Exo reveals a significant improvement in AUC0-∞, with a 20.84-fold increase compared to free DST and a 1.61-fold enhancement over DST-FuNP@Exo. This is further supported by in vivo imaging and demonstrated improved tumor localization. A tumor regression study shows a 6.8-fold reduction in tumors. Tumor tissue-specific IHC for the Ki67 proliferative marker is significantly reduced in the targeted formulation. The potential of DST-FuNP@YIGSR-Exo as an effective carrier for delivering chemotherapeutic drugs, paving the path for the advancement of biologically obtained nanocarriers for targeted breast cancer.

Potential of Natural Products in the Treatment of Glioma: Focus on Molecular Mechanisms

Despite the waning of traditional treatments for glioma due to possible long-term issues, the healing possibilities of substances derived from nature have been reignited in the scientific community. These natural substances, commonly found in fruits and vegetables, are considered potential alternatives to pharmaceuticals, as they have been shown in prior research to impact pathways surrounding cancer progression, metastases, invasion, and resistance. This review will explore the supposed molecular mechanisms of different natural components, such as berberine, curcumin, coffee, resveratrol, epigallocatechin-3-gallate, quercetin, tanshinone, silymarin, coumarin, and lycopene, concerning glioma treatment. While the benefits of a balanced diet containing these compounds are widely recognized, there is considerable scope for investigating the efficacy of these natural products in treating glioma.

Advances in tumor stroma-based targeted delivery

The tumor stroma plays a crucial role in tumor progression, and the interactions between the extracellular matrix, tumor cells, and stromal cells collectively influence tumor progression and the efficacy of therapeutic agents. Currently, utilizing components of the tumor stroma for drug delivery is a noteworthy strategy. A number of targeted drug delivery systems designed based on tumor stromal components are entering clinical trials. Therefore, this paper provides a thorough examination of the function of tumor stroma in the advancement of targeted drug delivery systems. One approach is to use tumor stromal components for targeted drug delivery, which includes certain stromal components possessing inherent targeting capabilities like HA, laminin, along with targeting stromal cells homologously. Another method entails directly focusing on tumor stromal components to reshape the tumor stroma and facilitate drug delivery. These drug delivery systems exhibit great potential in more effective cancer therapy strategies, such as precise targeting, enhanced penetration, improved safety profile, and biocompatibility. Ultimately, the deployment of these drug delivery systems can deepen our comprehension of tumor stroma and the advanced development of corresponding drug delivery systems.

The laminin receptor is a receptor for Micropterus salmoides rhabdovirus

Micropterus salmoides rhabdovirus (MSRV) is an important pathogen of largemouth bass. Despite extensive research, the functional receptors of MSRV remained unknown. This study identified the host protein, laminin receptor (LamR), as a cellular receptor facilitating MSRV entry into host cells. Our results demonstrated that LamR directly interacts with MSRV G protein, playing a pivotal role in the attachment and internalization processes of MSRV. Knockdown of LamR with siRNA, blocking cells with LamR antibody, or incubating MSRV virions with soluble LamR protein significantly reduced MSRV entry. Notably, we found that LamR mediated MSRV entry via clathrin-mediated endocytosis. Additionally, our findings revealed that MSRV G and LamR were internalized into cells and co-localized in the early and late endosomes. These findings highlight the significance of LamR as a cellular receptor facilitating MSRV binding and entry into target cells through interaction with the MSRV G protein.

IMPORTANCE

Despite the serious epidemic caused by Micropterus salmoides rhabdovirus (MSRV) in largemouth bass, the precise mechanism by which it invades host cells remains unclear. Here, we determined that laminin receptor (LamR) is a novel target of MSRV, that interacts with its G protein and is involved in viral attachment and internalization, transporting with MSRV together in early and late endosomes. This is the first report demonstrating that LamR is a cellular receptor in the MSRV life cycle, thus contributing new insights into host-pathogen interactions.