Dopamine D2 and Serotonin 5-HT1A Dimeric Receptor-Binding Monomeric Antibody scFv as a Potential Ligand for Carrying Drugs Targeting Selected Areas of the Brain

Abstract

Targeted therapy uses multiple ways of ensuring that the drug will be delivered to the desired site. One of these ways is an encapsulation of the drug and functionalization of the surface. Among the many molecules that can perform such a task, the present work focused on the antibodies of single-chain variable fragments (scFvs format). We studied scFv, which specifically recognizes the dopamine D2 and serotonin 5-HT1A receptor heteromers. The scFvD2–5-HT1A protein was analyzed biochemically and biologically, and the obtained results indicated that the antibody is properly folded and non-toxic and can be described as low-immunogenic. It is not only able to bind to the D2–5-HT1A receptor heteromer, but it also influences the cAMP signaling pathway and—when surfaced on nanogold particles—it can cross the blood–brain barrier in in vitro models. When administered to mice, it decreased locomotor activity, matching the effect induced by clozapine. Thus, we are strongly convinced that scFvD2–5-HT1A, which was a subject of the present investigation, is a promising targeting ligand with the potential for the functionalization of nanocarriers targeting selected areas of the brain.

Bisphosphonate-Based Hydrogel with pH-Responsive Minocycline Release Inhibits Microglia/Macrophages of M1 Polarization for Spinal Cord Injury Therapy

“…The ideal biomaterials applied in repairing SCI should have good cytocompatibility. The PC-12 cell line was isolated from the rat adrenal pheochromocytoma and has an embryonic origin from the neural crest. , PC-12 cells were involved in many in vitro neurobiological studies because they retained the characteristics of dopaminergic neurons. , Gel and MH@BP Gel leaching solution-treated PC-12 cells had viabilities of 108.59% and 93.47%, respectively, while MH Gel leaching solution-treated cells had viability of only 7.62% (Figure G). Live/dead cell staining images demonstrated that there were almost no dead cells in the Gel group and MH@BP Gel group (Figure H).…”