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Conjugate of an IgG Binding Domain with Botulinum Neurotoxin A Lacking the Acceptor Moiety Targets Its SNARE Protease into TrkA-Expressing Cells When Coupled to Anti-TrkA IgG or Fc-βNGF.

Numerous naturally occurring toxins can perturb biological systems when they invade susceptible cells. Coupling of pertinent targeting ligands to the active domains of such proteins provides a strategy for directing these to particular cellular populations implicated in disease. A novel approach described herein involved fusion of one mutated immunoglobulin G (IgG) binding moiety of staphylococcal protein A to the SNARE protease and translocation domain of botulinum neurotoxin A (BoNT/A). This chimera could be monovalently coupled to IgG or via its Fc region to recombinant targeting ligands. The utility of the resulting conjugates is demonstrated by the delivery of a SNARE protease into a cell line expressing tropomyosin receptor kinase A (TrkA) through coupling to anti-TrkA IgG or a fusion of Fc and nerve-growth factor. Thus, this is a versitile and innovative technology for conjugating toxins to diverse ligands for retargeted cell delivery of potential therapeutics.

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anti-Diazepam Binding Inh Anti Mouse IgG2b (γ2b c anti HCMV IE pp65 IgG1 (m FDA Standard Frozen Tissu Mouse Anti-Human CD34 Tar anti-Vitamin D binding pr Clostridium botulinum D T Anti-Mouse IgG2b (γ2b c FDA Standard Frozen Tissu anti HCMV gB IgG1 (monocl anti-Retinol binding prot anti HSV (II) gB IgG1 (mo

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Unrestricted somatic stem cells as vehicle for nerve growth factor gene transfer.

Nerve growth factor (NGF), a member of the neurotrophic factor family, plays a critical role in the maintenance and regeneration of different types of neurons. To overcome drastic challenges in the peripheral delivery of NGF, transplantation of NGF secreting stem cells to the target site of an injury may be an effective procedure. Unrestricted somatic stem cells (USSCs), a subtype of umbilical cord blood (UCB) stem cells, have shown promise for gene therapy purposes, and proper results have been observed from transplantation experiments in neurodegenerative disorders. Based on the considerable potential of USSCs for gene delivery applications, the goal of the current study was to establish a betaNGF gene containing USSCs, which is able to secrete functional recombinant betaNGF protein.

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