The blood-brain barrier (BBB) serves as the major obstacle for delivering genetic material to the brain via systemic routes. Consequently, developing accurate in vitro and ex vivo BBB models is critical for screening and optimizing brain transfection vectors and delivery methods before in vivo studies. Recent advances in BBB modeling have produced more physiologically relevant…
Neural stem cells (NSCs) are pivotal for brain development, repair, and plasticity, making them a prime target for genome editing approaches aimed at understanding gene function or correcting disease mutations. However, delivering CRISPR/Cas9 components effectively and safely into NSCs poses unique challenges due to their quiescent nature, sensitivity to DNA damage, and the need for…
Brain transfection techniques, whether viral or non-viral, introduce foreign genetic material and delivery vehicles into the delicate neural environment. One often overlooked consequence is microglial activation, the brain’s resident immune response, which can significantly influence both experimental outcomes and therapeutic safety. Understanding the mechanisms and impacts of microglial activation is critical for designing brain transfection…
Intracerebroventricular (ICV) injection is a direct delivery method that introduces genetic material or therapeutic agents into the cerebrospinal fluid (CSF) within the brain’s ventricles. This approach bypasses the blood-brain barrier and allows widespread distribution of vectors or nucleic acids throughout the central nervous system. ICV injection is widely used in experimental neuroscience for transfecting neonatal…
Lipid nanoparticles (LNPs) have become the leading non-viral platform for delivering mRNA therapeutics, including vaccines and gene editing components. Their ability to encapsulate and protect fragile mRNA, facilitate cellular uptake, and promote endosomal escape has revolutionized gene delivery technology. However, delivering LNP-encapsulated mRNA to brain tissue presents unique challenges due to the protective blood-brain barrier…
Stereotaxic transfection is a powerful technique for delivering genetic material precisely into deep brain regions that are otherwise difficult to access. By combining precise coordinates with microinjection and gene delivery tools, researchers can introduce plasmids, viral vectors, or nanoparticles into areas such as the hippocampus, striatum, or thalamus. This method is essential for studying localized…
Achieving cell-type specificity in brain transfection is critical for unraveling the diverse functions of distinct neural populations and minimizing off-target effects in gene therapy applications. The choice of promoter that drives transgene expression strongly influences which cells within the central nervous system (CNS) will produce the protein of interest after gene delivery. While ubiquitous promoters…
Delivering small interfering RNA (siRNA) to the central nervous system (CNS) holds great promise for silencing disease-related genes in neurodegenerative disorders, brain tumors, and neuroinflammatory conditions. However, effective delivery of siRNA to brain cells is challenging due to its instability, negative charge, and inability to cross the blood-brain barrier (BBB). Polymeric micelles and dendrimers have…
Microglia are the primary immune cells of the central nervous system and play key roles in homeostasis, synaptic pruning, and neuroinflammation. Despite their importance in neurobiology and brain pathology, transfecting microglia in vivo remains a formidable challenge. These cells possess an active endolysosomal system, rapidly degrade foreign nucleic acids, and are highly responsive to pattern…
CRISPR/Cas9 genome editing has revolutionized neuroscience by enabling targeted manipulation of genes involved in brain development, function, and disease. Delivering CRISPR components into brain tissue, however, presents technical and biological challenges that are not present in standard in vitro systems. Achieving efficient on-target editing in neurons and glial cells requires precise delivery of Cas9 and…
