Patents by Inventor Yong-Sun Bahn

Yong-Sun Bahn 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).

  • Publication number: 20230296613
    Abstract: The present invention relates to: a method for screening an antifungal agent, the method measuring the amount or activity of proteins involved in passage through the brain-blood barrier; a biomarker composition for diagnosing meningoencephalitis or cryptococcosis; a diagnostic kit including said composition; and a therapeutic pharmaceutical composition including an inhibitor for the protein.
    Type: Application
    Filed: September 18, 2020
    Publication date: September 21, 2023
    Inventors: Yong-Sun BAHN, Eunji CHEONG, Jong Seung LEE, Kyung-Tae LEE, Dong-Gi LEE, Joohyeon HONG
  • Publication number: 20230067422
    Abstract: The present invention relates to a derivative compound in which a biphenyl group is introduced into an aminoalkanoic acid, a stereoisomer thereof, or a pharmaceutically acceptable salt thereof. The compound of the present invention exhibits excellent antifungal and fungicidal effects. Furthermore, the compound of the present invention exhibits a synergistic effect when used in combination with a conventional antifungal agent. Furthermore, the compound of the present invention provides broad-spectrum antifungal activity against a wide range of fungal pathogens. Therefore, the compound of the present invention may be widely used in fields requiring treatment with antifungal or fungicidal agents against human pathogenic fungi and animal pathogenic fungi, and phytopathogenic fungi.
    Type: Application
    Filed: September 19, 2022
    Publication date: March 2, 2023
    Inventors: Ki Duk PARK, Jong Hyun PARK, Hyeon Ji KIM, Ye Rim LEE, Siwon KIM, Ji Won CHOI, Seul Ki YEON, Jong-Seung LEE, Yong-Sun BAHN, Eunji CHEONG, Kyung-Tae LEE, Joohyeon HONG
  • Publication number: 20230056812
    Abstract: The present invention relates to a derivative compound in which a biphenyl group is introduced into an aminoalkanoic acid, a stereoisomer thereof, or a pharmaceutically acceptable salt thereof. The compound of the present invention exhibits excellent antifungal and fungicidal effects. Furthermore, the compound of the present invention exhibits a synergistic effect when used in combination with a conventional antifungal agent. Furthermore, the compound of the present invention provides broad-spectrum antifungal activity against a wide range of fungal pathogens. Therefore, the compound of the present invention may be widely used in fields requiring treatment with antifungal or fungicidal agents against human pathogenic fungi and animal pathogenic fungi, and phytopathogenic fungi.
    Type: Application
    Filed: September 19, 2022
    Publication date: February 23, 2023
    Inventors: Ki Duk PARK, Jong Hyun PARK, Hyeon Ji KIM, Ye Rim LEE, Siwon KIM, Ji Won CHOI, Seul Ki YEON, Jong-Seung LEE, Yong-Sun BAHN, Eunji CHEONG, Kyung-Tae LEE, Joohyeon HONG
  • Publication number: 20230053855
    Abstract: The present invention relates to a derivative compound in which a biphenyl group is introduced into an aminoalkanoic acid, a stereoisomer thereof, or a pharmaceutically acceptable salt thereof. The compound of the present invention exhibits excellent antifungal and fungicidal effects. Furthermore, the compound of the present invention exhibits a synergistic effect when used in combination with a conventional antifungal agent. Furthermore, the compound of the present invention provides broad-spectrum antifungal activity against a wide range of fungal pathogens. Therefore, the compound of the present invention may be widely used in fields requiring treatment with antifungal or fungicidal agents against human pathogenic fungi and animal pathogenic fungi, and phytopathogenic fungi.
    Type: Application
    Filed: September 19, 2022
    Publication date: February 23, 2023
    Inventors: Ki Duk PARK, Jong Hyun PARK, Hyeon Ji KIM, Ye Rim LEE, Siwon KIM, Ji Won CHOI, Seul Ki YEON, Jong-Seung LEE, Yong-Sun BAHN, Eunji CHEONG, Kyung-Tae LEE, Joohyeon HONG
  • Patent number: 11479526
    Abstract: The present invention relates to a derivative compound in which a biphenyl group is introduced into an aminoalkanoic acid, a stereoisomer thereof, or a pharmaceutically acceptable salt thereof. The compound of the present invention exhibits excellent antifungal and fungicidal effects. Furthermore, the compound of the present invention exhibits a synergistic effect when used in combination with a conventional antifungal agent. Furthermore, the compound of the present invention provides broad-spectrum antifungal activity against a wide range of fungal pathogens. Therefore, the compound of the present invention may be widely used in fields requiring treatment with antifungal or fungicidal agents against human pathogenic fungi and animal pathogenic fungi, and phytopathogenic fungi.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: October 25, 2022
    Assignee: AMTIXBIO CO., LTD.
    Inventors: Ki Duk Park, Jong Hyun Park, Hyeon Ji Kim, Ye Rim Lee, Siwon Kim, Ji Won Choi, Seul Ki Yeon, Jong-Seung Lee, Yong-Sun Bahn, Eunji Cheong, Kyung-Tae Lee, Joohyeon Hong
  • Publication number: 20220144755
    Abstract: The present invention relates to a derivative compound in which a biphenyl group is introduced into an aminoalkanoic acid, a stereoisomer thereof, or a pharmaceutically acceptable salt thereof. The compound of the present invention exhibits excellent antifungal and fungicidal effects. Furthermore, the compound of the present invention exhibits a synergistic effect when used in combination with a conventional antifungal agent. Furthermore, the compound of the present invention provides broad-spectrum antifungal activity against a wide range of fungal pathogens. Therefore, the compound of the present invention may be widely used in fields requiring treatment with antifungal or fungicidal agents against human pathogenic fungi and animal pathogenic fungi, and phytopathogenic fungi.
    Type: Application
    Filed: December 27, 2021
    Publication date: May 12, 2022
    Inventors: Ki Duk PARK, Jong Hyun Park, Hyeon Ji Kim, Ye Rim Lee, Siwon Kim, Ji Won Choi, Seul Ki Yeon, Jong-Seung Lee, Yong-Sun Bahn, Eunji Cheong, Kyung-Tae Lee, Joohyeon Hong
  • Publication number: 20210348098
    Abstract: The present disclosure provides a microfluidic device for simulating a blood-brain barrier and a blood-brain barrier simulation system including the same, and the microfluidic device includes: a first channel; a second channel which is adjacently connected to the first channel through one or more microholes and configured to culture neural stem cells; and a chamber which is connected to both ends of the first channel and contains a culture medium.
    Type: Application
    Filed: September 19, 2019
    Publication date: November 11, 2021
    Inventors: Seung Woo CHO, Yong Sun BAHN, Jin KIM, Kyung Tae LEE
  • Publication number: 20210130867
    Abstract: The present invention relates to a use of kinases for treating and preventing fungal meningoencephalitis by pathogenic fungi of the genus Cryptococcus. Specifically, the present invention relates to a method for screening an antifungal agent characterized by measuring the amount or activity of a pathogenic-regulatory kinase protein of Cryptococcus neoformans, or the expression level of a gene encoding the protein; and an antifungal pharmaceutical composition comprising an inhibitor against a pathogenic-regulatory kinase protein of Cryptococcus neoformans or a gene encoding the same. An antifungal agent for treating meningoencephalitis, etc. can be effectively screened by using the method for screening an antifungal agent according to the present invention, and meningoencephalitis, etc. can be effectively treated by using the antifungal pharmaceutical composition according to the present invention.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 6, 2021
    Inventors: Yong-Sun Bahn, Dong-Hoon Yang, Kyung-Tae Lee, Yee-Seul So
  • Publication number: 20200199065
    Abstract: The present invention relates to novel functional derivatives of alanine and proline amino acids. The compounds of the present invention were confirmed to have a very superior antifungal or fungicidal effect. In addition, the compounds of the present invention were confirmed to exhibit a synergistic effect when co-administered with an existing antifungal preparation. Moreover, the compounds of the present invention showed activity on a wide range of fungi. Therefore, the compounds of the present invention can be widely used in a field which requires the treatment with an antifungal or fungicidal preparation against human infectious fungi, animal infectious fungi, and phytopathogenic fungi.
    Type: Application
    Filed: October 30, 2017
    Publication date: June 25, 2020
    Inventors: Ki Duk Park, Yong-Sun Bahn, Jong-Seung Lee, Kyung-Tae Lee, Ae Nim Pae, Seul Ki Yeon, Yong Koo Kang, Jong Hyun Park, Siwon Kim, Bo Ko Jang, Ji Won Choi
  • Publication number: 20180305728
    Abstract: The present invention relates to a novel gene regulating the virulence of Cryptococcus neoformans, and a use thereof. According to the present invention, anti-Cryptococcal or anti-fungal drug candidate materials can be effectively screened for. In addition, the present invention relates to a method for screening for drug candidate materials, which can bring a synergistic effect by being co-administered with a commercially available anti-Cryptococcal drug or anti-fungal drug. Furthermore, provided is a pharmaceutical composition having an anti-Cryptococcal or anti-fungal effect by increasing or decreasing the expression of transcription factors. The present inventors have performed a large-scale virulence test by using insect and animal models so as to identity transcription factors, and have analyzed a complex correlation between the transcription factors and in vivo and in vitro phenotypes of pathogenicity.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 25, 2018
    Inventors: Yong-Sun BAHN, Kwang-Woo JUNG, Dong-Hoon YANG
  • Patent number: 9855253
    Abstract: The present invention relates to a pharmaceutical composition containing FK506 derivative for treating a fungal infection caused by the genus Cryptococcus or the genus Candida, and a use thereof. In addition, the present invention relates to a therapeutic agent for fungal infection caused by the genus Cryptococcus or the genus Candida, the therapeutic agent containing FK506 derivative. The pharmaceutical composition of the present invention is harmless to the human body, and can make a great contribution to providing antifungal drugs with an excellent antifungal effect.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: January 2, 2018
    Assignee: INTRON BIOTECHNOLOGY CO., LTD.
    Inventors: Yong Sun Bahn, Hyo Jeong Kwon, Yeo Joon Yoon, Yeon Hee Ban
  • Publication number: 20170135993
    Abstract: The present invention relates to a pharmaceutical composition containing FK506 derivative for treating a fungal infection caused by the genus Cryptococcus or the genus Candida, and a use thereof. In addition, the present invention relates to a therapeutic agent for fungal infection caused by the genus Cryptococcus or the genus Candida, the therapeutic agent containing FK506 derivative. The pharmaceutical composition of the present invention, is harmless to the human body, and can make a great contribution to providing antifungal drugs with an excellent antifungal effect.
    Type: Application
    Filed: June 29, 2015
    Publication date: May 18, 2017
    Inventors: Yong Sun Bahn, Hyo Jeong Kwon, Yeo Joon Yoon, Yeon Hee Ban
  • Patent number: 9017956
    Abstract: Provided herein are uses of genes for HOG, Ras and cAMP signal transduction pathways to treat fungal infection. To regulate the HOG pathway of Cryptococcus neoformans, roles of SSK1, TCO2, SSK2, PBS2, HOG1, ENA1 and NHA1 genes were investigated to find that a biosynthesis level of ergosterol is increased when these genes are inhibited. When the genes are inhibited, a large amount of ergosterol is distributed on a fungal cell membrane. Accordingly, since there are many working points of an ergosterol-binding antifungal agent, an efficiency of the ergosterol-binding antifungal agent can be considerably improved. To regulate the Ras and cAMP pathways of Cryptococcus neoformans, roles of RAS1, RAS2, CDC24, GPA1, CAC1, ACA1, PKA1, HSP12 and HSP122 genes were investigated to find that a sensitivity to a polyene- or azole-based drug is increased when these genes are inhibited.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: April 28, 2015
    Assignee: Nutrex Technology Co., Ltd.
    Inventors: Yong-Sun Bahn, Young-Joon Ko, Shin-Ae Maeng, Kwang Woo Jung, Gyu Bum Kim
  • Publication number: 20130237446
    Abstract: Provided herein are uses of genes for HOG, Ras and cAMP signal transduction pathways to treat fungal infection. To regulate the HOG pathway of Cryptococcus neoformans, roles of SSK1, TCO2, SSK2, PBS2, HOG1, ENA1 and NHA1 genes were investigated to find that a biosynthesis level of ergosterol is increased when these genes are inhibited. When the genes are inhibited, a large amount of ergosterol is distributed on a fungal cell membrane. Accordingly, since there are many working points of an ergosterol-binding antifungal agent, an efficiency of the ergosterol-binding antifungal agent can be considerably improved. To regulate the Ras and cAMP pathways of Cryptococcus neoformans, roles of RAS1, RAS2, CDC24, GPA1, CAC1, ACA1, PKA1, HSP12 and HSP122 genes were investigated to find that a sensitivity to a polyene- or azole-based drug is increased when these genes are inhibited.
    Type: Application
    Filed: April 15, 2013
    Publication date: September 12, 2013
    Applicant: Nutrex Technology Co., Ltd.
    Inventors: Yong-Sun Bahn, Young-Joon Ko, Shin-Ae Maeng, Kwang Woo Jung, Gyu Bum Kim
  • Publication number: 20120093817
    Abstract: Provided herein are uses of genes for HOG, Ras and cAMP signal transduction pathways to treat fungal infection. To regulate the HOG pathway of Cryptococcus neoformans, roles of SSK1, TCO2, SSK2, PBS2, HOG1, ENA1 and NHA1 genes were investigated to find that a biosynthesis level of ergosterol is increased when these genes are inhibited. When the genes are inhibited, a large amount of ergosterol is distributed on a fungal cell membrane. Accordingly, since there are many working points of an ergosterol-binding antifungal agent, an efficiency of the ergosterol-binding antifungal agent can be considerably improved. To regulate the Ras and cAMP pathways of Cryptococcus neoformans, roles of RAS1, RAS2, CDC24, GPA1, CAC1, ACA1, PKA1, HSP12 and HSP122 genes were investigated to find that a sensitivity to a polyene- or azole-based drug is increased when these genes are inhibited.
    Type: Application
    Filed: January 8, 2010
    Publication date: April 19, 2012
    Inventors: Yong-Sun Bahn, Young-Joon Ko, Shin-Ae Maeng, Kwang Woo Jung, Gyu Bum Kim
  • Publication number: 20060293381
    Abstract: The present invention concerns methods of treating fungal infections and methods of screening compounds for activity in treating fungal infections. Methods of the invention include using an active compound such as fludioxonil to treat a Cryptococcus neoformans infection. Also included are methods and pharmaceutical compositions useful for treating fungal infections using a Hog1 activator such as fludioxonil and a calcineurin inhibitor in combination.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 28, 2006
    Inventors: Kaihei Kojima, Joseph Heitman, Yong-Sun Bahn