Patents by Inventor Xiujuan Hao
Xiujuan Hao 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: 11041856Abstract: The invention provides immunochromatographic test strips and methods and systems or kits for detecting and quantifying S-Adenosylmethionine (SAM), S-Adenosylhomocysteine (SAH) and Homocysteine (HCy) in a sample, comprising: (a) making fluorophore conjugated antibodies; (b) immobilizing SAM, SAH and HCy on a solid support; (c) providing a sample, combining said sample with a conjugate selected from the group consisting of lanthanide chelate conjugates and quantum dot conjugates (QD) with anti-SAM, anti-SAH or anti-HCy, wherein said combining is performed under conditions that allow formation of a competitive complex comprising said conjugate, said SAM, SAH or HCy on the solid support and SAM, SAH or HCy in a sample when present; and (d) detecting the presence of the complex, if present, by monitoring a spectral emission mediated by the fluorescent conjugates in the complex, wherein the emission indicates the presence and quantity of SAM, SAH or HCy in the sample.Type: GrantFiled: September 3, 2018Date of Patent: June 22, 2021Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES COInventors: Xiujuan Hao, Chaoyi Deng
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Patent number: 10663470Abstract: The invention provides a method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes test strips which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: GrantFiled: April 30, 2018Date of Patent: May 26, 2020Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES COInventors: Xiujuan Hao, Isaac Angres
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Patent number: 10656159Abstract: The invention provides a method of detecting the presence, absence or severity of a disease in a patient wherein said disease is accompanied by decreased level of S-adenosylmethionine, or increased level of S-adenosylhomocysterine, or reduced methylation index comprising: identifying any individual or a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of SAM in said biological sample using an antibody derived from a hapten analog of SAM, SAH; and correlating the levels of SAM, SAH and MI in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for determining methylation index in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes colloidal gold test strips and homogenous enzyme immunoassays which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: GrantFiled: February 5, 2018Date of Patent: May 19, 2020Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES COInventors: Xiujuan Hao, Isaac A Angres
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Publication number: 20190339283Abstract: The invention provides bioconjugates of heterocylic compounds such as S-adenosylmethionine and S-adenosylhomocysteine with biotin or digoxigenin. The bioconjugates also include carbon and nitrogen linker moieties of varying length that are used to attach such compounds to biotin or digoxigenin. The conjugates are useful in immunoassays. The invention provides a method for detecting SAM and SAH, comprising the steps of: (a) preparing the following components: (i) bio-conjugates of SAM, SAM analogs or SAH; (ii) an europium, a terbium cryptate or other fluorophore as a donor that has a specific ligand for the tracer in the bio-conjugates of (i); (iii) an acceptor fluorescent dye that has the excitation spectra overlap those of donor's emissions and has an antibody specific for SAM or SAH labeled; (b) addition of the biological fluid containing said SAM or SAH; and (c) spectroscopic measurement of the fluorescence of the donor and the fluorescence of from the acceptor.Type: ApplicationFiled: July 16, 2019Publication date: November 7, 2019Inventor: Xiujuan Hao
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Publication number: 20180372735Abstract: The invention provides immunochromatographic test strips and methods and systems or kits for detecting and quantifying S-Adenosylmethionine (SAM), S-Adenosylhomocysteine (SAH) and Homocysteine (HCy) in a sample, comprising: (a) making fluorophore conjugated antibodies; (b) immobilizing SAM, SAH and HCy on a solid support; (c) providing a sample, combining said sample with a conjugate selected from the group consisting of lanthanide chelate conjugates and quantum dot conjugates (QD) with anti-SAM, anti-SAH or anti-HCy, wherein said combining is performed under conditions that allow formation of a competitive complex comprising said conjugate, said SAM, SAH or HCy on the solid support and SAM, SAH or HCy in a sample when present; and (d) detecting the presence of the complex, if present, by monitoring a spectral emission mediated by the fluorescent conjugates in the complex, wherein the emission indicates the presence and quantity of SAM, SAH or HCy in the sample.Type: ApplicationFiled: September 3, 2018Publication date: December 27, 2018Inventors: Xiujuan Hao, Chaoyi Deng
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Patent number: 10138267Abstract: The invention provides bioconjugates of heterocylic compounds such as S-adenosylmethionine and S-adenosylhomocysteine with biotin or digoxigenin. The bioconjugates also include carbon and nitrogen linker moieties of varying length that are used to attach such compounds to biotin or digoxigenin. The conjugates are useful in immunoassays. The invention provides a method for detecting SAM and SAH, comprising the steps of: (a) preparing the following components: (i) bio-conjugates of SAM, SAM analogs or SAH; (ii) an europium, a terbium cryptate or other fluorophore as a donor that has a specific ligand for the tracer in the bio-conjugates of (i); (iii) an acceptor fluorescent dye that has the excitation spectra overlap those of donor's emissions and has an antibody specific for SAM or SAH labeled; (b) addition of the biological fluid containing said SAM or SAH; and (c) spectroscopic measurement of the fluorescence of the donor and the fluorescence of from the acceptor.Type: GrantFiled: April 5, 2016Date of Patent: November 27, 2018Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES Co. Ltd.Inventor: Xiujuan Hao
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Publication number: 20180328927Abstract: The present invention discloses a methionine adenosyltransferase (MAT) activity assay method and a kit for measuring MAT activity. A sample and relevant reagents are mixed in certain way that MAT-catalyzed reaction occurs efficiently. The reaction and the competitive ELISA that quantifies the product S-adenosylmethionine (SAM) are carried out simultaneously. The MAT activity is calculated as the amount of SAM produced per unit time. SAM is calculated through spectral absorbance of the SAM produced and comparing it to that of the standard. The method of SAM quantification is via tracer-labelled anti-SAM antibody or SAM (or SAM analog) antigen through competitive ELISA, so that the produced SAM competes with the SAM antigen for binding anti-SAM antibody. The method and the kit described in the present invention are more sensitive, accurate, reliable, straightforward, easier and faster. The method was used to measure the MAT activities of normal and cancerous liver cells.Type: ApplicationFiled: November 6, 2016Publication date: November 15, 2018Inventors: Xiujuan Hao, Huijun Li, Min Zhou
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Patent number: 10067126Abstract: The invention provides immunochromatographic test strips and methods for detecting and quantifying S-Adenosylmethionine (SAM), S-Adenosylhomocysteine (SAH) and Homocysteine (HCy) in a sample, comprising: (a) making fluorophore conjugated antibodies; (b) immobilizing SAM, SAH and HCy on a solid support; (c) providing a sample, combining said sample with a conjugate selected from the group consisting of lanthanide chelate conjugates and quantum dot conjugates (QD) with anti-SAM, anti-SAH or anti-HCy, wherein said combining is performed under conditions that allow formation of a competitive complex comprising said conjugate, said SAM, SAH or HCy on the solid support and SAM, SAH or HCy in a sample when present; and (d) detecting the presence of the complex, if present, by monitoring a spectral emission mediated by the fluorescent conjugates in the complex, wherein the emission indicates the presence and quantity of SAM, SAH or HCy in the sample.Type: GrantFiled: May 25, 2016Date of Patent: September 4, 2018Assignee: Hunan Skyworld Biotechnologies Co. LTDInventors: Xiujuan Hao, Junhua Wu, Chaoyi Deng
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Publication number: 20180246110Abstract: The invention provides a method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes test strips which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: ApplicationFiled: April 30, 2018Publication date: August 30, 2018Inventors: Xiujuan Hao, Isaac Angres
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Publication number: 20180169128Abstract: A method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence or absence of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual.Type: ApplicationFiled: January 29, 2018Publication date: June 21, 2018Inventors: Xiujuan Hao, Isaac Angres
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Publication number: 20180156816Abstract: The invention provides a method of detecting the presence, absence or severity of a disease in a patient wherein said disease is accompanied by decreased level of S-adenosylmethionine, or increased level of S-adenosylhomocysterine, or reduced methylation index comprising: identifying any individual or a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of SAM in said biological sample using an antibody derived from a hapten analog of SAM, SAH; and correlating the levels of SAM, SAH and MI in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for determining methylation index in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes colloidal gold test strips and homogenous enzyme immunoassays which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: ApplicationFiled: February 5, 2018Publication date: June 7, 2018Inventors: Xiujuan Hao, Isaac A Angres
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Patent number: 9958447Abstract: The invention provides a method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes test strips which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: GrantFiled: August 11, 2014Date of Patent: May 1, 2018Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES COInventors: Xiujuan Hao, Isaac A Angres
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Patent number: 9885723Abstract: The invention provides a method of detecting the presence, absence or severity of a disease in a patient wherein said disease is accompanied by decreased level of S-adenosylmethionine, or increased level of S-adenosylhomocysterine, or reduced methylation index comprising: identifying any individual or a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of SAM in said biological sample using an antibody derived from a hapten analog of SAM, SAH; and correlating the levels of SAM, SAH and MI in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for determining methylation index in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes colloidal gold test strips and homogenous enzyme immunoassays which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: GrantFiled: June 7, 2015Date of Patent: February 6, 2018Assignee: HUNAN SKYWORLD BIOTECHNOLOGIES COInventors: Xiujuan Hao, Isaac A Angres
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Patent number: 9877982Abstract: A method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence or absence of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual.Type: GrantFiled: March 18, 2014Date of Patent: January 30, 2018Assignee: Hunan SkyWorld Biotechnologies Co. LTDInventors: Xiujuan Hao, Isaac A Angres
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Publication number: 20160349251Abstract: The invention provides immunochromatographic test strips and methods for detecting and quantifying S-Adenosylmethionine (SAM), S-Adenosylhomocysteine (SAH) and Homocysteine (HCy) in a sample, comprising: (a) making fluorophore conjugated antibodies; (b) immobilizing SAM, SAH and HCy on a solid support; (c) providing a sample, combining said sample with a conjugate selected from the group consisting of lanthanide chelate conjugates and quantum dot conjugates (QD) with anti-SAM, anti-SAH or anti-HCy, wherein said combining is performed under conditions that allow formation of a competitive complex comprising said conjugate, said SAM, SAH or HCy on the solid support and SAM, SAH or HCy in a sample when present; and (d) detecting the presence of the complex, if present, by monitoring a spectral emission mediated by the fluorescent conjugates in the complex, wherein the emission indicates the presence and quantity of SAM, SAH or HCy in the sample.Type: ApplicationFiled: May 25, 2016Publication date: December 1, 2016Inventors: Xiujuan Hao, Junhua Wu, Chaoyi Deng
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Publication number: 20160291014Abstract: The invention provides bioconjugates of heterocylic compounds such as S-adenosylmethionine and S-adenosylhomocysteine with biotin or digoxigenin. The bioconjugates also include carbon and nitrogen linker moieties of varying length that are used to attach such compounds to biotin or digoxigenin. The conjugates are useful in immunoassays. The invention provides a method for detecting SAM and SAH, comprising the steps of: (a) preparing the following components: (i) bio-conjugates of SAM, SAM analogs or SAH; (ii) an europium, a terbium cryptate or other fluorophore as a donor that has a specific ligand for the tracer in the bio-conjugates of (i); (iii) an acceptor fluorescent dye that has the excitation spectra overlap those of donor's emissions and has an antibody specific for SAM or SAH labeled; (b) addition of the biological fluid containing said SAM or SAH; and (c) spectroscopic measurement of the fluorescence of the donor and the fluorescence of from the acceptor.Type: ApplicationFiled: April 5, 2016Publication date: October 6, 2016Inventor: Xiujuan Hao
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Publication number: 20160041154Abstract: The invention provides a method of detecting the presence, absence or severity of a disease in a patient wherein said disease is accompanied by decreased level of S-adenosylmethionine, or increased level of S-adenosylhomocysterine, or reduced methylation index comprising: identifying any individual or a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of SAM in said biological sample using an antibody derived from a hapten analog of SAM, SAH; and correlating the levels of SAM, SAH and MI in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for determining methylation index in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes colloidal gold test strips and homogenous enzyme immunoassays which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: ApplicationFiled: June 7, 2015Publication date: February 11, 2016Inventors: Xiujuan Hao, Isaac A. Angres
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Publication number: 20150268231Abstract: The invention provides a method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence, absence, or severity of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual. Additionally, the invention includes test strips which are useful for determining S-adenosylmethionine and S-adenosylhomocysteine.Type: ApplicationFiled: August 11, 2014Publication date: September 24, 2015Inventors: Xiujuan Hao, Isaac A. Angres
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Publication number: 20140271945Abstract: A method of detecting the presence or absence of a disease in a patient wherein said disease is accompanied by deficient levels of S-adenosylmethionine comprising: identifying a patient that is suspected of having said disease or is at risk of having said disease; obtaining a biological sample from said patient; determining the level of S-adenosylmethionine in said biological sample using an antibody derived from a hapten analog of S-adenosylmethionine; and correlating the level of S-adenosylmethionine in said biological sample with the presence or absence of said disease. The invention also provides methods for measuring SAH which is used to determine the methylation index (ratio of SAM/SAH) in biological fluids which is indicative of the health status of an individual.Type: ApplicationFiled: March 18, 2014Publication date: September 18, 2014Inventors: Xiujuan Hao, Isaac A. Angres