ENGINEERED CHIMERIC FUSION PROTEIN COMPOSITIONS AND METHODS OF USE THEREOF
The present disclosure provides compositions and methods for making and using engineered phagocytic cells that express a chimeric antigen receptor having an enhanced phagocytic activity for immunotherapy in cancer or infection.
1 - 265 . (canceled)
266 . A method of making a population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a chimeric fusion protein (CFP), the method comprising:
(a) selecting CD14+ cells from a biological sample from a human subject, thereby obtaining a population of CD14+ cells isolated from the biological sample from a human subject, and
(b) contacting a recombinant polynucleic acid comprising a sequence encoding a CFP to the population of CD14+ cells isolated from the biological sample of (a), thereby introducing the recombinant polynucleic acid into the population of CD14+ cells isolated from the biological sample of (a) and obtaining the population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a CFP, wherein the CFP comprises (i) an extracellular domain, (ii) a transmembrane domain operatively linked to the extracellular domain; and (iii) an intracellular domain with at least one intracellular signaling domain; wherein the CFP is capable of binding CD5.
267 . The method of claim 266 , wherein selecting CD14+ cells comprises negative selection.
268 . The method of claim 267 , wherein negative selection comprises contacting the biological sample with an antibody targeting a cell surface molecule selected from the group consisting of CD16, CD3, CD8, CD11c, CD40, CD206 and any combination thereof.
269 . The method of claim 267 , wherein selecting CD14+ cells comprises selecting CD14+ cells by density centrifugation.
270 . The method of claim 267 , wherein selecting CD14+ cells comprises selecting CD14+ cells by elutriation.
271 . The method of claim 266 , wherein the population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a CFP is a population of cells with at least 1×10 6 CD14+/CD16− cells containing a recombinant polynucleic acid encoding a CFP.
272 . The method of claim 266 , wherein selecting CD14+ cells comprises selecting CD14+ cells without contacting the biological sample with an antibody targeting CD14.
273 . The method of claim 266 , wherein selecting CD14+ cells comprises fluorescence activated cell sorting (FACS) or magnetic activated cell sorting (MACS).
274 . The method of claim 266 , wherein the recombinant polynucleic acid is RNA.
275 . The method of claim 274 , wherein the RNA is mRNA.
276 . The method of claim 266 , wherein contacting a recombinant polynucleic acid comprising a sequence encoding a CFP into the population of CD14+ cells isolated from the biological sample of (a) comprises electroporating the population of CD14+ cells isolated from the biological sample of (a) in the presence of the recombinant polynucleic acid.
277 . The method of claim 266 , further comprising expressing the CFP in the CD14+ cells of (b) containing a recombinant polynucleic acid encoding a CFP.
278 . The method of claim 266 , wherein the population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a CFP comprises at least 1×10 6 cells.
279 . The method of claim 266 , wherein the biological sample from a human subject is a peripheral blood sample or an apheresis sample.
280 . The method of claim 279 , wherein the biological sample from a human subject is a leukapheresis sample.
281 . The method of claim 266 , wherein the intracellular signaling domain comprises an intracellular signaling domain derived from FcγR or FcεR.
282 . The method of claim 281 , wherein the intracellular domain comprises at least two intracellular signaling domains.
283 . The method of claim 282 , wherein the intracellular domain comprises a PI3K recruitment domain.
284 . The method of claim 281 , wherein the transmembrane domain comprise a CD8 transmembrane domain, a CD28 transmembrane domain, a CD2 transmembrane domain, or a CD68 transmembrane domain.
285 . The method of claim 266 , wherein at least 50% of the population of CD14+ cells isolated from the biological sample of (a) express the CFP 24 hours after (b).
286 . A pharmaceutical composition comprising a population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a chimeric fusion protein (CFP), wherein the CFP comprises (i) an extracellular domain, (ii) a transmembrane domain operatively linked to the extracellular domain; and (iii) an intracellular domain with at least one intracellular signaling domain; wherein the CFP is capable of binding CD5.
287 . A method of treating a cancer in a human subject in need thereof, the method comprising administering to the human subject a pharmaceutical composition, wherein the pharmaceutical composition comprises a population of cells with CD14+ cells containing a recombinant polynucleic acid encoding a chimeric fusion protein (CFP), wherein the CFP comprises (i) an extracellular domain, (ii) a transmembrane domain operatively linked to the extracellular domain; and (iii) an intracellular domain with at least one intracellular signaling domain; wherein the CFP is capable of binding CD5.
288 . The method of claim 287 , wherein the cancer is T cell lymphoma.