Patents by Inventor Charles G. Peele
Charles G. Peele has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8716557Abstract: Methods for altering the N-glycosylation pattern of proteins in higher plants are provided. The methods comprise introducing into the plant a recombinant RNAi construct that provides for the inhibition of expression of ?1,3-fucosyltransferase (FucT) and ?1,2-xylosyltransferase (XylT) in a plant. Use of these RNAi constructs to inhibit or suppress expression of both of these enzymes, and isoforms thereof, advantageously provides for the production of endogenous and heterologous proteins having a “humanized” N-glycosylation pattern without impacting plant growth and development. Stably transformed higher plants having this protein N-glycosylation pattern are provided. Glycoprotein compositions, including monoclonal antibody compositions, having substantially homogeneous glycosylation profiles, and which are substantially homogeneous for the G0 glycoform, are also provided.Type: GrantFiled: January 17, 2007Date of Patent: May 6, 2014Assignee: Synthon Biopharmaceuticals B.V.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele, Ming-Bo Wang
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Publication number: 20120276086Abstract: The invention pertains to anti-CD30 antibodies that lack fucosyl and xylosyl residues. The antibodies of the invention exhibit increased antibody-dependent cellular cytotoxicity (ADCC) activity, including the ability to lyse CD30-expressing cell lines that are not lysed by the fucosylated and xylosylated form of the antibodies. The invention also provides host cells that express the anti-CD30 antibodies that lack fucosyl and xylosyl residues, wherein the host cells are deficient for a fucosyltransferase and a xylosyltransferase. Methods of using the antibodies to inhibit the grown of CD30+ cells, such as tumor cells, are also provided.Type: ApplicationFiled: April 18, 2012Publication date: November 1, 2012Applicants: MEDAREX, INC., BIOLEX THERAPEUTICS, INC.Inventors: Amelia Nancy BLACK, David B. PASSMORE, Mohan SRINIVASAN, Lynn F. DICKEY, Kevin M. COX, Charles G. PEELE, Ming-Bo WANG
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Patent number: 8034916Abstract: Compositions and methods for regulating expression of nucleotide sequences of interest in a plant are provided. Compositions include novel nucleic acid molecules, and variants and fragments thereof, for expression control elements isolated from the Lemnaceae ubiquitin, r-histone and chitinase genes. A method for expressing a nucleotide sequence of interest in a plant using the expression control elements disclosed herein is further provided. The method includes introducing into a plant or plant cell or nodule an expression construct comprising an expression control element of the present invention operably linked to a nucleotide sequence of interest. In particular, the compositions and methods find use in enhancing expression of nucleotide sequences of interest in duckweed. Also provided is a novel Lemnaceae signal peptide-encoding sequence and the signal peptide encoded thereby.Type: GrantFiled: October 19, 2009Date of Patent: October 11, 2011Assignee: Biolex Therapeutics, Inc.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele
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Patent number: 8017836Abstract: The present invention provides methods and compositions for the production of recombinant plasminogen, microplasminogen, and fragments thereof in a duckweed expression system. It is the novel finding of the present invention that a duckweed expression system may be used to produce high levels of plasminogen and microplasminogen. The duckweed-produced plasminogen and microplasminogen can be activated to produce a polypeptide having protease activity. Thus, the invention encompasses methods for the expression of plasminogen, microplasminogen, and fragments thereof in duckweed, duckweed plants that are transformed with expression cassettes for the expression of plasminogen, microplasminogen, and fragments thereof, and nucleic acids comprising nucleotide sequences encoding plasminogen, microplasminogen, and fragments thereof, where these nucleotide sequences are modified to enhance their expression in duckweed.Type: GrantFiled: December 22, 2009Date of Patent: September 13, 2011Assignee: Biolex Therapeutics, Inc.Inventors: David Spencer, Lynn F. Dickey, John R. Gasdaska, Xiaowei Wang, Kevin M. Cox, Charles G. Peele
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Publication number: 20110144308Abstract: Methods for altering the N-glycosylation pattern of proteins in higher plants are provided. The methods comprise introducing into the plant a recombinant construct that provides for the inhibition of expression of ?1,3-fucosyltransferase (FucT) and ?1,2-xylosyltransferase (XylT) in a plant. Use of these constructs to inhibit or suppress expression of both of these enzymes, and isoforms thereof, advantageously provides for the production of endogenous and heterologous proteins having a “humanized” N-glycosylation pattern without impacting plant growth and development. Stably transformed higher plants having this protein N-glycosylation pattern are provided. Glycoprotein compositions, including monoclonal antibody compositions, having substantially homogeneous glycosylation profiles, and which are substantially homogeneous for the G0 glycoform, are also provided.Type: ApplicationFiled: November 29, 2010Publication date: June 16, 2011Applicant: BIOLEX THERAPEUTICS, INC.Inventors: LYNN F. DICKEY, KEVIN M. COX, CHARLES G. PEELE
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Patent number: 7884264Abstract: Methods for altering the N-glycosylation pattern of proteins in higher plants are provided. In some embodiments, the methods comprise introducing into a duckweed plant a recombinant RNAi construct that provides for the inhibition of expression of ?1,3-fucosyltransferase (FucT) and ?1,2-xylosyltransferase (XylT). Use of these RNAi constructs to inhibit or suppress expression of both of these enzymes, and isoforms thereof, advantageously provides for the production of endogenous and heterologous proteins having a “humanized” N-glycosylation pattern without impacting plant growth and development. Stably transformed higher plants, including duckweed plants, having this protein N-glycosylation pattern are provided. Glycoprotein compositions, including monoclonal antibody compositions, having substantially homogeneous glycosylation profiles, and which are substantially homogeneous for the G0 glycoform, are also provided.Type: GrantFiled: January 17, 2007Date of Patent: February 8, 2011Assignee: Biolex Therapeutics, Inc.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele
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Publication number: 20100186126Abstract: The present invention provides methods and compositions for the production of recombinant plasminogen, microplasminogen, and fragments thereof in a duckweed expression system. It is the novel finding of the present invention that a duckweed expression system may be used to produce high levels of plasminogen and microplasminogen. The duckweed-produced plasminogen and microplasminogen can be activated to produce a polypeptide having protease activity. Thus, the invention encompasses methods for the expression of plasminogen, microplasminogen, and fragments thereof in duckweed, duckweed plants that are transformed with expression cassettes for the expression of plasminogen, microplasminogen, and fragments thereof, and nucleic acids comprising nucleotide sequences encoding plasminogen, microplasminogen, and fragments thereof, where these nucleotide sequences are modified to enhance their expression in duckweed.Type: ApplicationFiled: December 22, 2009Publication date: July 22, 2010Applicant: BIOLEX THERAPEUTICS, INC.Inventors: DAVID SPENCER, LYNN F. DICKEY, JOHN R. GASDASKA, XIAOWEI WANG, KEVIN M. COX, CHARLES G. PEELE
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Publication number: 20100043099Abstract: Compositions and methods for regulating expression of nucleotide sequences of interest in a plant are provided. Compositions include novel nucleic acid molecules, and variants and fragments thereof, for expression control elements isolated from the Lemnaceae ubiquitin, r-histone and chitinase genes. A method for expressing a nucleotide sequence of interest in a plant using the expression control elements disclosed herein is further provided. The method includes introducing into a plant or plant cell or nodule an expression construct comprising an expression control element of the present invention operably linked to a nucleotide sequence of interest. In particular, the compositions and methods find use in enhancing expression of nucleotide sequences of interest in duckweed. Also provided is a novel Lemnaceae signal peptide-encoding sequence and the signal peptide encoded thereby.Type: ApplicationFiled: October 19, 2009Publication date: February 18, 2010Applicant: Biolex Therapeutics, Inc.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele
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Patent number: 7659445Abstract: The present invention provides methods and compositions for the production of recombinant plasminogen, microplasminogen, and fragments thereof in a duckweed expression system. It is the novel finding of the present invention that a duckweed expression system may be used to produce high levels of plasminogen and microplasminogen. The duckweed-produced plasminogen and microplasminogen can be activated to produce a polypeptide having protease activity. Thus, the invention encompasses methods for the expression of plasminogen, microplasminogen, and fragments thereof in duckweed, duckweed plants that are transformed with expression cassettes for the expression of plasminogen, microplasminogen, and fragments thereof, and nucleic acids comprising nucleotide sequences encoding plasminogen, microplasminogen, and fragments thereof, where these nucleotide sequences are modified to enhance their expression in duckweed.Type: GrantFiled: February 11, 2005Date of Patent: February 9, 2010Assignee: Biolex Therapeutics, Inc.Inventors: David Spencer, Lynn F. Dickey, John R. Gasdaska, Xiaowei Wang, Kevin M. Cox, Charles G. Peele
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Patent number: 7632983Abstract: Methods, nucleic acid sequences, and transformed duckweed plant or duckweed nodule cultures for the expression and the secretion of biologically active polypeptides from genetically engineered duckweed are provided. Expression of recombinant polypeptides in duckweed is improved by modifying the nucleotide sequence of the expression cassette encoding the polypeptide for improved expression in duckweed. Recovery of biologically active polypeptides from duckweed is improved by linking the biologically active polypeptide to a signal peptide that directs the secretion of the polypeptide into the culture medium. Methods of producing recombinant monoclonal antibodies having effector function, and antibodies produced by these methods are provided.Type: GrantFiled: March 5, 2004Date of Patent: December 15, 2009Assignee: Biolex Therapeutics, Inc.Inventors: Lynn F. Dickey, John R. Gasdaska, Kevin M. Cox, Charles G. Peele, David Spencer
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Patent number: 7622573Abstract: Compositions and methods for regulating expression of nucleotide sequences of interest in a plant are provided. Compositions include novel nucleic acid molecules, and variants and fragments thereof, for expression control elements isolated from the Lemnaceae ubiquitin, r-histone and chitinase genes. A method for expressing a nucleotide sequence of interest in a plant using the expression control elements disclosed herein is further provided. The method includes introducing into a plant or plant cell or nodule an expression construct comprising an expression control element of the present invention operably linked to a nucleotide sequence of interest. In particular, the compositions and methods find use in enhancing expression of nucleotide sequences of interest in duckweed. Also provided is a novel Lemnaceae signal peptide-encoding sequence and the signal peptide encoded thereby.Type: GrantFiled: January 16, 2007Date of Patent: November 24, 2009Assignee: Biolex, Inc.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele
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Publication number: 20090175886Abstract: The invention pertains to anti-CD30 antibodies that lack fucosyl and xylosyl residues. The antibodies of the invention exhibit increased antibody-dependent cellular cytotoxicity (ADCC) activity, including the ability to lyse CD30-expressing cell lines that are not lysed by the fucosylated and xylosylated form of the antibodies. The invention also provides host cells that express the anti-CD30 antibodies that lack fucosyl and xylosyl residues, wherein the host cells are deficient for a fucosyltransferase and a xylosyltransferase. Methods of using the antibodies to inhibit the growth of CD30 cells, such as tumor cells, are also provided.Type: ApplicationFiled: January 17, 2007Publication date: July 9, 2009Applicant: MEDAREX, INC.Inventors: Amelia Naucy Black, David B. Passmore, Mohan Srinivasan, Lynn F. Dickey, Kevin M. Cox, Charles G. Peele, Ming-Bo Wang
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Publication number: 20090060921Abstract: Glycan-optimized monoclonal antibodies that specifically bind CD20 antigen and which have improved effector function are provided. The anti-CD20 antibodies of the invention have a glycosylation pattern that results in an antibody composition having predominately the G0 glycoform, and thus comprise N-glycans that lack fucose (i.e., afucosylated) and galactose residues attached thereto. In some embodiments, these anti-CD20 antibodies comprise the light chain and heavy chain sequences of the rituximab anti-CD20 antibody, and thus represent afucosylated rituximab. Methods for producing these glycan-optimized anti-CD20 antibodies are also provided.Type: ApplicationFiled: May 5, 2008Publication date: March 5, 2009Applicant: Biolex Therapeutics, Inc.Inventors: Lynn F. Dickey, Kevin M. Cox, Charles G. Peele, Ming-Bo Wang
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Publication number: 20040261148Abstract: Methods, nucleic acid sequences, and transformed duckweed plant or duckweed nodule cultures for the expression and the secretion of biologically active polypeptides from genetically engineered duckweed are provided. Expression of recombinant polypeptides in duckweed is improved by modifying the nucleotide sequence of the expression cassette encoding the polypeptide for improved expression in duckweed. Recovery of biologically active polypeptides from duckweed is improved by linking the biologically active polypeptide to a signal peptide that directs the secretion of the polypeptide into the culture medium. Methods of producing recombinant monoclonal antibodies having effector function, and antibodies produced by these methods are provided.Type: ApplicationFiled: March 5, 2004Publication date: December 23, 2004Applicant: Biolex, Inc.Inventors: Lynn F. Dickey, John R. Gasdaska, Kevin M. Cox, Charles G. Peele, David Spencer