Anti-human immunodeficiency virus (HIV) broadly neutralizing antibodies (bNAbs) offer a promising approach for the treatment of HIV-1. The current paradigm for antibody therapy involves passive antibody transfer, requiring regular delivery of bNAbs in treating chronic diseases such as HIV-1. An alternative strategy is to use AAV-mediated gene transfer to enable in vivo production of desirable anti-HIV-1 antibodies. In this study, we investigated two sets of triple combinations of AAV9-vectors encoding different bNAbs: N6, 10E8, 10-1074 (CombiMab1), and VRC07-523, PGDM1400, 10-1074 (CombiMab2). We used CBAxC57Bl and C57BL/6 mouse models to characterize rAAV-induced antibody expression and to evaluate the neutralization capacity of mouse sera against a global panel of HIV-1 viral strains. rAAV9-mediated IgG expression varied between bNAb clones and mouse strains, with C57BL/6 mice exhibiting higher bNAb titers following rAAV delivery. Although CombiMab2 treatment elicited a higher IgG titer than CombiMab1, both combinations resulted in neutralization of all the viral strains from the global HIV-1 panel. Our data highlight the potential of AAV vectors as a long-term option for HIV-1 therapy.

Diabetes mellitus (DM) is a metabolic disease characterized by persistent hyperglycemia, resulting from defects in insulin secretion or impaired insulin action. In cases of severe pancreatic cell dysfunction and deficiency, the primary treatment remains lifelong insulin injections. A potential alternative is allogeneic pancreatic cell transplantation from a donor, which can stabilize glucose levels. However, the scarcity of donor material and the risk of immune rejection limit the widespread use of this approach. An alternative solution involves using in vitro-derived insulin-producing cells generated through the differentiation of pluripotent stem cells (PSCs), which could overcome the shortage of transplantable material. Furthermore, patient-specific cells—obtained directly from the patient via reprogramming of blood or skin cells into induced pluripotent stem cells (iPSCs)—would avoid immune rejection. Advances in this field have led to the active development and optimization of PSC differentiation into hormone-producing cells worldwide, with more than hundred patients dosed in clinical trials with ESC-derived cells and the single trial of iPSC-derived cells. This review highlights recent progress and prospects in generating insulin-producing cells from human PSCs, their applications in therapy development and disease modeling, as well as the current challenges and potential solutions.