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Kim Y, Lee JO, Lee JM, Lee MH, Kim HM, Chung HC, Kim DU, Lee JH, Kim BJ. Low Molecular Weight Collagen Peptide (LMWCP) Promotes Hair Growth by Activating the Wnt/GSK-3β/β-Catenin Signaling Pathway. J Microbiol Biotechnol 2024; 34:17-28. [PMID: 37830229 PMCID: PMC10840484 DOI: 10.4014/jmb.2308.08013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/05/2023] [Accepted: 09/21/2023] [Indexed: 10/14/2023]
Abstract
Low molecular weight collagen peptide (LMWCP) is a collagen hydrolysate derived from fish. We investigated the effects of LMWCP on hair growth using human dermal papilla cells (hDPCs), human hair follicles (hHFs), patch assay, and telogenic C57BL/6 mice, while also examining the underlying mechanisms of its action. LMWCP promoted proliferation and mitochondrial potential, and the secretion of hair growth-related factors, such as EGF, HB-EGF, FGF-4, and FGF-6 in hDPCs. Patch assay showed that LMWCP increased the neogeneration of new HFs in a dose-dependent manner. This result correlated with an increase in the expression of dermal papilla (DP) signature genes such as, ALPL, SHH, FGF7, and BMP-2. LMWCP upregulated phosphorylation of glycogen synthase kinase-3β (GSK-3β) and β-catenin, and nuclear translocation of β-catenin, and it increased the expression of Wnt3a, LEF1, VEGF, ALP, and β-catenin. LMWCP promoted the growth of hHFs and increased the expression of β-catenin and VEGF. Oral administration of LMWCP to mice significantly stimulated hair growth. The expression of Wnt3a, β-catenin, PCNA, Cyclin D1, and VEGF was also elevated in the back skin of the mice. Furthermore, LMWCP increased the expression of cytokeratin and Keratin Type I and II. Collectively, these findings demonstrate that LMWCP has the potential to increase hair growth via activating the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Yujin Kim
- Department of Dermatology, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
- Department of Medicine, Graduate School, Chung-Ang University, Seoul 06973, Republic of Korea
| | - Jung Ok Lee
- Department of Dermatology, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Jung Min Lee
- Department of Dermatology, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Mun-Hoe Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Hyeong-Min Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Hee-Chul Chung
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Do-Un Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Jin-Hee Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Beom Joon Kim
- Department of Dermatology, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
- Department of Medicine, Graduate School, Chung-Ang University, Seoul 06973, Republic of Korea
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Saulnier KG, Panaite V, Ganoczy D, Kim HM, Zivin K, Hofer T, Piette JD, Pfeiffer PN. Depression symptom outcomes and re-engagement among VA patients who discontinue care while symptomatic. Gen Hosp Psychiatry 2023; 85:87-94. [PMID: 37862961 DOI: 10.1016/j.genhosppsych.2023.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 10/12/2023] [Accepted: 10/12/2023] [Indexed: 10/22/2023]
Abstract
OBJECTIVE Evaluate outcomes of Veterans who discontinued treatment with at least moderate ongoing depressive symptoms. METHOD Veterans with elevated depression symptoms from 29 Department of Veterans Affairs facilities completed baseline surveys and follow-up assessments for one year. Analyses examined rates and predictors of treatment discontinuation, treatment re-engagement, and subsequent symptoms among patients who remained out of care. RESULTS A total of 242 (17.8%; n = 1359) participants discontinued treatment while symptomatic, with Black participants, participants with less severe depression, and participants receiving only psychotherapy (versus combined psychotherapy and antidepressant medications) discontinuing at higher rates. Among all participants who discontinued treatment (n = 445), 45.8% re-engaged within the following six months with participants receiving combined treatment re-engaging at higher rates. Of participants who discontinued while symptomatic within the first 6 months of the study and did not return to care (n = 112), 68.8% remained symptomatic at 12 months. Lower baseline treatment expectancy and greater depression symptom severity were associated with remaining symptomatic while untreated. CONCLUSIONS Black race, lower symptom severity, and treatment modality may help identify patients at higher risk for discontinuing care while symptomatic, whereas patients with lower treatment expectations may be at greater risk for remaining out of care despite continuing symptoms.
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Affiliation(s)
- K G Saulnier
- VA Serious Mental Illness Treatment Resource and Evaluation Center, Ann Arbor, MI, USA; VA Ann Arbor Healthcare System, Ann Arbor, MI, USA; University of Michigan Medical School, Ann Arbor, MI, USA.
| | - V Panaite
- James A. Haley Veterans' Hospital, Tampa, FL, USA
| | - D Ganoczy
- VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
| | - H M Kim
- VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA; University of Michigan Consulting for Statistics, Computing, and Analytics Research, Ann Arbor, MI, USA
| | - K Zivin
- University of Michigan Medical School, Ann Arbor, MI, USA; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA; School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - T Hofer
- University of Michigan Medical School, Ann Arbor, MI, USA; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
| | - J D Piette
- University of Michigan Medical School, Ann Arbor, MI, USA; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA; School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - P N Pfeiffer
- VA Ann Arbor Healthcare System, Ann Arbor, MI, USA; University of Michigan Medical School, Ann Arbor, MI, USA; VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
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Jo HS, Kim HM, Han JY, Park HK. Atypical progress of frozen shoulder after COVID-19 vaccination: A case report. World J Clin Cases 2023; 11:3637-3642. [PMID: 37383894 PMCID: PMC10294196 DOI: 10.12998/wjcc.v11.i15.3637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/22/2023] [Accepted: 04/18/2023] [Indexed: 05/25/2023] Open
Abstract
BACKGROUND After vaccination was mandated worldwide, various adverse effects associated with the coronavirus disease 2019 (COVID-19) vaccination, including shoulder pain, have been reported. Here, we report a case of new-onset shoulder pain after BNT162b2 (Comirnaty, Pfizer-BioNTech) mRNA vaccination.
CASE SUMMARY A 50-year-old man visited our rehabilitation center with left shoulder range of motion (ROM) limitation that had persisted for more than 5 mo. The history included no specific noteworthy events, except vaccination. The pain in the patient’s left deltoid muscle appeared 1 day after the second BNT162b2 vaccination and intensified to severe pain. The patient self-administered aspirin, with which the pain subsided immediately, whereas ROM limitation persisted. At the first visit, the patient complained of dull pain and ROM restriction of the left shoulder (flexion 130°, abduction 110°, and external rotation 40°). Among the diagnostic studies conducted for the evaluation of the shoulder, magnetic resonance imaging showed a thickened coracohumeral ligament. Nerve conduction studies and needle electromyography showed no electrodiagnostic abnormalities. The patient received comprehensive rehabilitation for 7 mo and had an overall improvement in pain and ROM of the left shoulder.
CONCLUSION In this case of severe shoulder pain after COVID-19 vaccination that subsided immediately with aspirin treatment, the exact cause and mechanism of pain are unclear. However, the clinical symptoms and diagnostic workups in our report suggest the possibility that the COVID-19 vaccination triggered an immunochemical response that resulted in shoulder pathology.
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Affiliation(s)
- Hyun-Seok Jo
- Department of Physical and Rehabilitation Medicine, Research Institute of Medical Sciences, Heart Research Center, Chonnam National University, Chonnam National University Medical School & Hospital, Gwangju City 61469, South Korea
| | - Hyeong-Min Kim
- Department of Physical and Rehabilitation Medicine, Research Institute of Medical Sciences, Heart Research Center, Chonnam National University, Chonnam National University Medical School & Hospital, Gwangju City 61469, South Korea
| | - Jae-Young Han
- Department of Physical and Rehabilitation Medicine, Regional Cardiocerebrovascular Center, Center for Aging and Geriatrics, Research Institute of Medical Sciences, Heart Research Center, Chonnam National University, Chonnam National University Medical School & Hospital, Gwangju City 61469, South Korea
| | - Hyeng-Kyu Park
- Department of Physical and Rehabilitation Medicine, Research Institute of Medical Sciences, Heart Research Center, Chonnam National University, Chonnam National University Medical School & Hospital, Gwangju City 61469, South Korea
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Lin C, Ahn JK, Choi JM, Farrington MS, Gonzalez M, Grethen N, Hsiung YB, Inagaki T, Kamiji I, Kim EJ, Kim JL, Kim HM, Kawata K, Kitagawa A, Komatsubara TK, Kotera K, Lee SK, Lee JW, Lim GY, Luo Y, Matsumura T, Nakagiri K, Nanjo H, Nomura T, Ono K, Redeker JC, Sato T, Sasse V, Shibata T, Shimizu N, Shinkawa T, Shinohara S, Shiomi K, Shiraishi R, Suzuki S, Tajima Y, Tung YC, Wah YW, Watanabe H, Wu T, Yamanaka T, Yoshida HY. Search for the Pair Production of Dark Particles X with K_{L}^{0}→XX, X→γγ. Phys Rev Lett 2023; 130:111801. [PMID: 37001070 DOI: 10.1103/physrevlett.130.111801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 02/08/2023] [Indexed: 06/19/2023]
Abstract
We present the first search for the pair production of dark particles X via K_{L}^{0}→XX with X decaying into two photons using the data collected by the KOTO experiment. No signal was observed in the mass range of 40-110 MeV/c^{2} and 210-240 MeV/c^{2}. This sets upper limits on the branching fractions as B(K_{L}^{0}→XX)<(1-4)×10^{-7} and B(K_{L}^{0}→XX)<(1-2)×10^{-6} at the 90% confidence level for the two mass regions, respectively.
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Affiliation(s)
- C Lin
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - J M Choi
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - M S Farrington
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - M Gonzalez
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - N Grethen
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - Y B Hsiung
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - T Inagaki
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - I Kamiji
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - E J Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - J L Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - H M Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - K Kawata
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - A Kitagawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T K Komatsubara
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - K Kotera
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S K Lee
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - J W Lee
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - G Y Lim
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - Y Luo
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - T Matsumura
- Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan
| | - K Nakagiri
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Nanjo
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Nomura
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - K Ono
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - J C Redeker
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - T Sato
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - V Sasse
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - T Shibata
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - N Shimizu
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Shinkawa
- Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan
| | - S Shinohara
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Shiomi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - R Shiraishi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Suzuki
- Department of Physics, Saga University, Saga 840-8502, Japan
| | - Y Tajima
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
| | - Y-C Tung
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - Y W Wah
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - H Watanabe
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - T Wu
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - T Yamanaka
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Y Yoshida
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
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Kim HM. Effects of self-efficacy, self-esteem, and disability acceptance on the social participation of people with physical disabilities: Focusing on COVID-19 pandemic. Brain Behav 2023; 13:e2824. [PMID: 36448298 PMCID: PMC9847590 DOI: 10.1002/brb3.2824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/23/2022] [Accepted: 11/01/2022] [Indexed: 12/05/2022] Open
Abstract
PURPOSE The objective of this study was to understand the effects of self-efficacy, self-esteem, and the degree of disability acceptance of people with physical disabilities living in COVID-19 pandemic on their social participation. METHODS Among the 4577 registered disabled people who participated in the 2nd wave of the Panel Survey of Employment for the Disabled (PSED), 1682 people with physical disabilities who faithfully answered all the survey items were selected as the final study subjects. This study used the variables of social participation, self-efficacy, self-esteem, and disability acceptance, which were validated by experts' review and consulting and research at the Korea Employment Agency for Persons with Disability. Pearson's correlation analysis and multiple linear regression analysis were performed to identify variables that could predict the social participation of the study subjects. RESULTS The self-efficacy, self-esteem, and the degree of disability acceptance of people with physical disabilities were positively correlated with social participation. The results of this study showed that self-efficacy, self-esteem, the degree of disability acceptance, economic activity, and education level explained 22.4% of social participation. CONCLUSIONS It was found that self-efficacy, self-esteem, and the degree of disability acceptance of people with physical disabilities were important variables affecting social participation. These psychoemotional variables shall be considered for intervention approaches to improve the social participation of people with physical disabilities in the future.
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Affiliation(s)
- Hyeong-Min Kim
- Department of Occupational Therapy, Gimcheon University, Gimcheon, South Korea
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Kim HM, Lee HY, Park JH, Lee SK. Fiber Optic Plasmonic Sensors Based on Nanodome Arrays with Nanogaps. ACS Sens 2022; 7:1451-1457. [PMID: 35522993 DOI: 10.1021/acssensors.2c00154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, a high-performance fiber optic surface plasmon resonance (FO-SPR) sensor using a dome array with nanogaps (DANG) is proposed for label-free real-time detection of biomolecules. A novel and simple method using polymer beads enables high sensitivity by allowing hotspots with nanometer spacing between the Au dome and the surrounding film. The nanodome structure, which comprises a polymer core and a Au shell, induces a localized surface plasmon, expands the sensing area, and extensively enhances the electromagnetic field. The refractive index sensitivity of the FO-SPR sensor with nanostructures, i.e., with nanogaps and nanodomes, was found to be 7.8 times higher than that of the FO-SPR sensor without nanostructures. The proposed sensor achieved a low detection limit of 38 fg/mL while quantifying thyroglobulin antibody-antigen interactions and exhibited excellent selectivity. In addition, it helped detect serum samples with a 103% recovery rate.
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Affiliation(s)
- Hyeong-Min Kim
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, Republic of Korea
| | - Ho-Young Lee
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Republic of Korea
| | - Jae-Hyoung Park
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, Republic of Korea
| | - Seung-Ki Lee
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, Republic of Korea
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Kim HM, Park JH, Lee SK. Fabrication and measurement of fiber optic localized surface plasmon resonance sensor based on gold nanoparticle dimer. Spectrochim Acta A Mol Biomol Spectrosc 2021; 261:120034. [PMID: 34116419 DOI: 10.1016/j.saa.2021.120034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/12/2021] [Accepted: 05/27/2021] [Indexed: 06/12/2023]
Abstract
Fiber optic localized surface plasmon resonance (FO LSPR) sensors capable of portable, real-time, and remote sensing are emerging with the progress of lab-on-fiber technology. However, the small area of the substrate by the optical fiber often restricts the sensitivity of the FO LSPR sensors. To improve the performance of the FO LSPR sensors, it is necessary to enhance the interactions between incident light and plasmonic nanostructures within a defined region. Dimer in which two nanoparticles are arranged with nanometer spacing can effectively increase the light-nanostructure interactions. It is well known that the nanogap made in the assembled nanoparticles significantly enhances the intensity of the electromagnetic field in the confined area by the hot spot effect. We fabricate the dimers of gold nanoparticles on the optical fiber with benzenethiol using a method that reduces the repulsive force between the nanoparticles. In the dimers, the strong plasmonic interaction between the two nanoparticles produces a longitudinal plasmon coupling band, which is compared to the transverse plasmon band by the monomer-based FO LSPR sensor with a similar density of gold nanoparticles. In the proposed sensor, the longitudinal band displays approximately 9.1 times improved sensitivity. When two types of sensors are applied to the biosensor application, the dimer-based FO LSPR sensor also proves an improved limit of detection of about 2.6 times. This method is expected to become a milestone in the field of measurement for small molecules and low concentration through the advancement of the yield and density of dimers.
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Affiliation(s)
- Hyeong-Min Kim
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, South Korea
| | - Jae-Hyoung Park
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, South Korea.
| | - Seung-Ki Lee
- Department of Electronics and Electrical Engineering, Dankook University, Yongin 16890, South Korea.
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Kim HM, Bae SW, Park JH, Lee SK. Detection limit enhancement of fiber optic localized surface plasmon resonance biosensor by increased scattering efficiency and reduced background signal. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lee MH, Kim HM, Chung HC, Kim DU, Lee JH. Low-Molecular-Weight Collagen Peptide Ameliorates Osteoarthritis Progression through Promoting Extracellular Matrix Synthesis by Chondrocytes in a Rabbit Anterior Cruciate Ligament Transection Model. J Microbiol Biotechnol 2021; 31:1401-1408. [PMID: 34528913 PMCID: PMC9705828 DOI: 10.4014/jmb.2108.08027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 12/15/2022]
Abstract
This study examined whether the oral administration of low-molecular-weight collagen peptide (LMCP) containing 3% Gly-Pro-Hyp with >15% tripeptide (Gly-X-Y) content could ameliorate osteoarthritis (OA) progression using a rabbit anterior cruciate ligament transection (ACLT) model of induced OA and chondrocytes isolated from a patient with OA. Oral LMCP administration (100 or 200 mg/kg/day) for 12 weeks ameliorated cartilage damage and reduced the loss of proteoglycan compared to the findings in the ACLT control group, resulting in dose-dependent (p < 0.05) improvements of the OARSI score in hematoxylin & eosin (H&E) and Safranin O staining. In microcomputed tomography analysis, LMCP also significantly (p < 0.05) suppressed the deterioration of the microstructure in tibial subchondral bone during OA progression. The elevation of IL-1βand IL-6 concentrations in synovial fluid following OA induction was dose-dependently (p < 0.05) reduced by LMCP treatment. Furthermore, immunohistochemistry illustrated that LMCP significantly (p < 0.05) upregulated type II collagen and downregulated matrix metalloproteinase-13 in cartilage tissue. Consistent with the in vivo results, LMCP significantly (p < 0.05) increased the mRNA expression of COL2A1 and ACAN in chondrocytes isolated from a patient with OA regardless of the conditions for IL-1βinduction. These findings suggest that LMCP has potential as a therapeutic treatment for OA that stimulates cartilage regeneration.
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Affiliation(s)
- Mun-Hoe Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Hyeong-Min Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Hee-Chul Chung
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Do-Un Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea
| | - Jin-Hee Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Republic of Korea,Corresponding author Phone: +82-70-8015-8518 Fax: +82-2-6949-1293 E-mail:
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Kim HM, Joo K, Han J, Woo SJ. Clinical and Genetic Characteristics of Korean Congenital Stationary Night Blindness Patients. Genes (Basel) 2021; 12:genes12060789. [PMID: 34064005 PMCID: PMC8224030 DOI: 10.3390/genes12060789] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/11/2021] [Accepted: 05/18/2021] [Indexed: 01/27/2023] Open
Abstract
In this study, we investigated the clinical and genetic characteristics of 19 Korean patients with congenital stationary night blindness (CSNB) at two tertiary hospitals. Clinical evaluations, including fundus photography, spectral-domain optical coherence tomography, and electroretinography, were performed. Genetic analyses were conducted using targeted panel sequencing or whole exome sequencing. The median age was 5 (3–21) years at the initial examination, 2 (1–8) years at symptom onset, and 11 (5–28) years during the final visit. Genetic mutations were identified as CNGB1 and GNAT1 for the Riggs type (n = 2), TRPM1 and NYX for the complete type (n = 3), and CACNA1F (n = 14) for the incomplete type. Ten novel variants were identified, and best-corrected visual acuity (BCVA) and spherical equivalents (SE) were related to each type of CSNB. The Riggs and TRPM1 complete types presented mild myopia and good BCVA without strabismus and nystagmus, whereas the NYX complete and incomplete types showed mixed SE and poor BCVA with strabismus and nystagmus. This is the first case series of Korean patients with CSNB, and further studies with a larger number of subjects should be conducted to correlate the clinical and genetic aspects of CSNB.
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Affiliation(s)
- Hyeong-Min Kim
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Korea; (H.-M.K.); (K.J.)
| | - Kwangsic Joo
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Korea; (H.-M.K.); (K.J.)
| | - Jinu Han
- Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea
- Correspondence: (J.H.); (S.-J.W.); Tel.: +82-2-2019-3445 (J.H.); +82-31-787-7377 (S.-J.W.); Fax: +82-2-3463-1049 (J.H.); +82-31-787-4057 (S.-J.W.)
| | - Se-Joon Woo
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Korea; (H.-M.K.); (K.J.)
- Correspondence: (J.H.); (S.-J.W.); Tel.: +82-2-2019-3445 (J.H.); +82-31-787-7377 (S.-J.W.); Fax: +82-2-3463-1049 (J.H.); +82-31-787-4057 (S.-J.W.)
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Ahn JK, Beckford B, Campbell M, Chen SH, Comfort J, Dona K, Farrington MS, Hanai K, Hara N, Haraguchi H, Hsiung YB, Hutcheson M, Inagaki T, Isoe M, Kamiji I, Kato T, Kim EJ, Kim JL, Kim HM, Komatsubara TK, Kotera K, Lee SK, Lee JW, Lim GY, Lin QS, Lin C, Luo Y, Mari T, Masuda T, Matsumura T, Mcfarland D, McNeal N, Miyazaki K, Murayama R, Nakagiri K, Nanjo H, Nishimiya H, Noichi Y, Nomura T, Nunes T, Ohsugi M, Okuno H, Redeker JC, Sanchez J, Sasaki M, Sasao N, Sato T, Sato K, Sato Y, Shimizu N, Shimogawa T, Shinkawa T, Shinohara S, Shiomi K, Shiraishi R, Su S, Sugiyama Y, Suzuki S, Tajima Y, Taylor M, Tecchio M, Togawa M, Toyoda T, Tung YC, Vuong QH, Wah YW, Watanabe H, Yamanaka T, Yoshida HY, Zaidenberg L. Study of the K_{L}→π^{0}νν[over ¯] Decay at the J-PARC KOTO Experiment. Phys Rev Lett 2021; 126:121801. [PMID: 33834796 DOI: 10.1103/physrevlett.126.121801] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
The rare decay K_{L}→π^{0}νν[over ¯] was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of (7.20±0.05_{stat}±0.66_{syst})×10^{-10}, three candidate events were observed in the signal region. After unveiling them, contaminations from K^{±} and scattered K_{L} decays were studied, and the total number of background events was estimated to be 1.22±0.26. We conclude that the number of observed events is statistically consistent with the background expectation. For this dataset, we set an upper limit of 4.9×10^{-9} on the branching fraction of K_{L}→π^{0}νν[over ¯] at the 90% confidence level.
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Affiliation(s)
- J K Ahn
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - B Beckford
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Campbell
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - S H Chen
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - J Comfort
- Department of Physics, Arizona State University, Tempe, Arizona 85287, USA
| | - K Dona
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M S Farrington
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - K Hanai
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - N Hara
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Haraguchi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y B Hsiung
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - M Hutcheson
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - T Inagaki
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Isoe
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - I Kamiji
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Kato
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - E J Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - J L Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - H M Kim
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - T K Komatsubara
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - K Kotera
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S K Lee
- Division of Science Education, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - J W Lee
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - G Y Lim
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - Q S Lin
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - C Lin
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China
| | - Y Luo
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - T Mari
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Masuda
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - T Matsumura
- Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan
| | - D Mcfarland
- Department of Physics, Arizona State University, Tempe, Arizona 85287, USA
| | - N McNeal
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - K Miyazaki
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - R Murayama
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - K Nakagiri
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Nanjo
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - H Nishimiya
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Noichi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Nomura
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - T Nunes
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Ohsugi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Okuno
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - J C Redeker
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - J Sanchez
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Sasaki
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
| | - N Sasao
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - T Sato
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K Sato
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Sato
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - N Shimizu
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Shimogawa
- Department of Physics, Saga University, Saga 840-8502, Japan
| | - T Shinkawa
- Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan
| | - S Shinohara
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Shiomi
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - R Shiraishi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Su
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Y Sugiyama
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Suzuki
- Department of Physics, Saga University, Saga 840-8502, Japan
| | - Y Tajima
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
| | - M Taylor
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Tecchio
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Togawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Toyoda
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y-C Tung
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - Q H Vuong
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y W Wah
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - H Watanabe
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - T Yamanaka
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Y Yoshida
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
| | - L Zaidenberg
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
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12
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Lee MH, Kim HM, Chung HC, Lee JH. Licorice extract suppresses adipogenesis through regulation of mitotic clonal expansion and adenosine monophosphate-activated protein kinase in 3T3-L1 cells. J Food Biochem 2020; 44:e13528. [PMID: 33051883 DOI: 10.1111/jfbc.13528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/31/2020] [Accepted: 09/28/2020] [Indexed: 02/06/2023]
Abstract
Licorice, the root of Glycyrrhiza glabra, has been observed to possess an anti-obesity effect. Previous research has suggested that licorice acetone extract (LE) has an influence on mitotic clonal expansion (MCE) and adenosine monophosphate-activated protein kinase (AMPK), which play a key role in regulating adipogenesis. This study sought further insight into the molecular mechanism of LE's anti-obesity effect using 3T3-L1 adipocytes in vitro. LE inhibited 3T3-L1 adipogenesis, and the inhibitory effect of LE on adipogenesis was most significant in the early stage of adipogenic differentiation. LE inhibited the protein expression of cyclins and cyclin-dependent kinases in the MCE stage and arrested cells in the G1 phase of the cell cycle. Furthermore, it activated AMPK via phosphorylation. Moreover, the expression levels of lipid metabolism-related genes were regulated by LE. These findings suggest the anti-obesity effect of LE via MCE and AMPK regulation. PRACTICAL APPLICATIONS: Although the anti-obesity effects of licorice have been studied, the application of functional food-related anti-obesity effects of licorice has been less than that of other extracts. The present study increases the reliability of the anti-obesity effect of licorice by suggesting a new mechanism of action and expands the application of functional foods related to the anti-obesity effect of licorice. A new mechanistic insight will not only improve the scientific knowledge but will also help to predict the side effects of licorice's anti-obesity application.
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Affiliation(s)
- Mun-Hoe Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul, Republic of Korea
| | - Hyeong-Min Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul, Republic of Korea
| | - Hee-Chul Chung
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul, Republic of Korea
| | - Jin-Hee Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul, Republic of Korea
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13
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Kim HM, Lee YK, Kim ES, Koo JS. Energy transfer from adipocytes to cancer cells in breast cancer. Neoplasma 2020; 67:992-1001. [PMID: 32412774 DOI: 10.4149/neo_2020_191017n1050] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/13/2019] [Indexed: 11/08/2022]
Abstract
Limitations of the current therapeutic approach have raised the need for a novel therapeutic agent in breast cancer. Recently, interest in drugs targeting the tumor microenvironment (TME) had drawn attention in the treatment of breast cancer. Furthermore, recent studies have suggested the role of adipocytes, which are part of the TME, in tumor initiation, growth, and metastasis. In this study, we investigated the metabolic interaction between adipocytes and breast cancer cells and its potential as a new therapeutic target in breast cancer. Breast cancer cell lines and human breast cancer tissue samples were evaluated. Compared to cancer cells cultured alone, or the control group, those co-cultured with adipocytes showed lipid transfer from adipocytes to cancer cells and it was different according to the molecular subtype of breast cancer. Breast cancer cells affected the lipolysis of adipocytes and adipocytes affected the β-oxidation of breast cancer cells. The key molecule of the process was fatty acid binding protein 4 (FABP4), which is combined with free fatty acid (FFA) and supports its migration to cancer cells. When FABP4 was suppressed, lipid transfer between adipocytes and cancer cells, lipolysis of adipocytes, and β-oxidation of breast cancer cells were reduced. Furthermore, the expression of lipid metabolism-related proteins and lipolysis-related proteins in breast cancer with adipose stroma showed significantly different expression according to the region of breast cancer tissue. Taken together, we demonstrated the metabolic interaction between adipocytes and breast cancer cells. Breast cancer cells increase the lipolysis in adipocytes and produce a fatty acid, and fatty acid enters into cancer cells. Also, adipocytes contribute to the survival and growth of cancer cells through increased mitochondrial β-oxidation by using fatty acid from adipocytes. The key molecule of the process is FABP4 and when FABP4 is suppressed, the metabolic interaction is reduced, suggesting its role as a potential therapeutic target.
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Affiliation(s)
- H M Kim
- Department of Pathology, College of Medicine, Yonsei University, Seoul, South Korea
| | - Y K Lee
- Department of Pathology, College of Medicine, Yonsei University, Seoul, South Korea
| | - E S Kim
- Department of Pathology, College of Medicine, Yonsei University, Seoul, South Korea
| | - J S Koo
- Department of Pathology, College of Medicine, Yonsei University, Seoul, South Korea
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14
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Kim HM, Kim HK, Lee JH, Park EA, Park JB, Lee SP, Kim YJ, Sohn DW, Lee YB, Kim YJ, Yoon JH. P1603 Changes of cardiac function in cirrhotic patients after liver transplantation. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.1021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
This study was supported by the grant of CJ healthcare 2016 research fund.
Background
Liver cirrhosis (LC) has been known to affect cardiovascular performance. Limited study have evaluated the alteration of myocardial function in patients with LC after liver transplantation (LT).
Purpose
The aim of study was to evaluate changes of cardiac function in patients with cirrhosis following LT using conventional and speckle-tracking echocardiography and late gadolinium enhancement (LGE) of cardiac magnetic resonance (MR).
Methods
Thirty-five patients with cirrhosis (mean age, 57.1 ± 9.0; male, 75%) who were listed for LT were prospectively enrolled. Patients underwent conventional, speckle-tracking echocardiography, and cardiac MR imaging with LGE. Echocardiography and cardiac MR were performed at pre and 1 year after LT. Cirrhotic patients were compared with normal control (n = 20, mean age, 65.0 ± 14.8; men, 11(55%)) and echocardiographic and cardiac MR data were compared pre and post LT.
Results
Conventional and speckle-tracking echocardiography and Cardiac MR imaging demonstrated hyperdynamic left ventricular (LV) function in patients with cirrhosis (LV ejection fraction (EF) with cardiac MR 67.8 ± 7.0% in LC vs. 63.4 ± 6.4% in control, P = 0.028; global longitudinal strain (GLS) -24.3 ± 2.6% in LC vs. -18.6 ± 2.2% in control, P < 0.001). There were no LGE in patients with cirrhosis and no significant differences in LV size, LV wall thickness, LV mass index, and diastolic function between cirrhotic patients and control group (all P > 0.1). Corrected QT interval (QTc) in electrocardiogram was prolonged in LC patients (P < 0.001). One-year after LT, LV end-diastolic diameter and LV end-diastolic volume significantly decreased (P = 0.016 and 0.022, respectively). Although LVEF showed no significant changes 1 year post-LT (P = 0.362), LV-GLS (from -24.7 ± 1.8% to -20.8 ± 3.4%, P < 0.001) significantly decreased. QTc interval also decreased 1 year after LT (from 470.4 ± 29.6msec to 428.2 ± 31.6msec, P = 0.001).
Conclusions
The present study demonstrated that cirrhotic patients showed hyperdynamic circulation and prolonged QTc interval compared with normal controls. After 1 year LT, LV size reduced and augmented LV function was normalized. Given that no LGE in cardiac MR and normalized GLS and QTc after LT, cardiac dysfunction in LC patients could be reversed by LT.
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Affiliation(s)
- H M Kim
- Mediplex Sejong Hospital, Incheon, Korea (Republic of)
| | - H K Kim
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - J H Lee
- Seoul National University Hospital, Gastroenterology, Seoul, Korea (Republic of)
| | - E A Park
- Seoul National University Hospital, Radiology, Seoul, Korea (Republic of)
| | - J B Park
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - S P Lee
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - Y J Kim
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - D W Sohn
- Seoul National University Hospital, Cardiology, Seoul, Korea (Republic of)
| | - Y B Lee
- Seoul National University Hospital, Gastroenterology, Seoul, Korea (Republic of)
| | - Y J Kim
- Seoul National University Hospital, Gastroenterology, Seoul, Korea (Republic of)
| | - J H Yoon
- Seoul National University Hospital, Gastroenterology, Seoul, Korea (Republic of)
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15
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Kim HM, Park JH, Lee SK. Fiber optic sensor based on ZnO nanowires decorated by Au nanoparticles for improved plasmonic biosensor. Sci Rep 2019; 9:15605. [PMID: 31666617 PMCID: PMC6821738 DOI: 10.1038/s41598-019-52056-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/11/2019] [Indexed: 01/21/2023] Open
Abstract
Fiber-optic-based localized surface plasmon resonance (FO-LSPR) sensors with three-dimensional (3D) nanostructures have been developed. These sensors were fabricated using zinc oxide (ZnO) nanowires and gold nanoparticles (AuNPs) for highly sensitive plasmonic biosensing. The main achievements in the development of the biosensors include: (1) an extended sensing area, (2) light trapping effect by nanowires, and (3) a simple optical system based on an optical fiber. The 3D nanostructure was fabricated by growing the ZnO nanowires on the cross-section of optical fibers using hydrothermal synthesis and via immobilization of AuNPs on the nanowires. The proposed sensor outputted a linear response according to refractive index changes. The 3D FO-LSPR sensor exhibited an enhanced localized surface plasmon resonance response of 171% for bulk refractive index changes when compared to the two-dimensional (2D) FO-LSPR sensors where the AuNPs are fixed on optical fiber as a monolayer. In addition, the prostate-specific antigen known as a useful biomarker to diagnose prostate cancer was measured with various concentrations in 2D and 3D FO-LSPR sensors, and the limits of detection (LODs) were 2.06 and 0.51 pg/ml, respectively. When compared to the 2D nanostructure, the LOD of the sensor with 3D nanostructure was increased by 404%.
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Affiliation(s)
- Hyeong-Min Kim
- Department of Electronics and Electrical Engineering, Dankook University, Yongin, 16890, South Korea
| | - Jae-Hyoung Park
- Department of Electronics and Electrical Engineering, Dankook University, Yongin, 16890, South Korea.
| | - Seung-Ki Lee
- Department of Electronics and Electrical Engineering, Dankook University, Yongin, 16890, South Korea.
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16
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Kim HM, Park JH, Lee SK. Fabrication and measurement of optical waveguide sensor based on localized surface plasmon resonance. Micro and Nano Syst Lett 2019. [DOI: 10.1186/s40486-019-0086-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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17
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Lee JY, Kim M, Yang HK, Kim HM, Cho J, Kim YM, Lim IS, Cheong HK, Kim HS, Sohn I, Kim J, Ahn K. Reliability and validity of the Atopic Dermatitis Symptom Score (ADSS). Pediatr Allergy Immunol 2018; 29:290-295. [PMID: 29350788 DOI: 10.1111/pai.12865] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/11/2018] [Indexed: 12/01/2022]
Abstract
BACKGROUND We have developed the Atopic Dermatitis Symptom Score (ADSS) by which patients or parents can easily assess and record AD symptoms on a daily basis in a smartphone application. The aim of this study was to evaluate the reliability and validity of the ADSS. METHODS We enrolled 307 children and adolescents with AD. Parents or caregivers were asked to record daily symptoms of the patients (itching, sleep disturbance, erythema, dryness, oozing, and edema) using a scale of 0-4. Statistical analyses consisted of the test-retest reliability, concurrent validity, minimal clinically important difference (MCID), responsiveness, floor or ceiling effects, and screening accuracy. Receiver-operating characteristic analyses were conducted to evaluate the ADSS cutoff point for predicting severe AD (SCORing AD [SCORAD] ≥40). RESULTS Test-retest reliability between daytime and night-time ADSS was good (intraclass correlation coefficient, 0.82 [95% CI: 0.70-0.90]). An increase in ADSS was significantly associated with an increase in SCORAD (r = 0.64, P < .0001) (concurrent validity). The MCID was 4.1 points for the ADSS. There was a significant association between changes in ADSS and SCORAD (r = 0.56, P < .0001), indicating good responsiveness. At the optimal ADSS cutoff value of 7.0, sensitivity, specificity, and positive and negative predictive values were 88.4%, 78.6%, 21.1%, and 99.1%, respectively (screening accuracy). CONCLUSIONS The ADSS can be a useful tool for self-assessment of skin symptoms in children with AD.
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Affiliation(s)
- J Y Lee
- Department of Pediatrics, Hallym University Hangang Sacred Heart Hospital, Seoul, Korea
| | - M Kim
- Department of Pediatrics, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - H-K Yang
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H M Kim
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - J Cho
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y-M Kim
- Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - I S Lim
- Department of Pediatrics, Chung-Ang University Hospital, Seoul, Korea
| | - H-K Cheong
- Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Korea.,Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H S Kim
- Statistics and Data Center, Samsung Biomedical Research Institute, Seoul, Korea
| | - I Sohn
- Statistics and Data Center, Samsung Biomedical Research Institute, Seoul, Korea
| | - J Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
| | - K Ahn
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Environmental Health Center for Atopic Diseases, Samsung Medical Center, Seoul, Korea
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18
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Upadhaya SD, Lee DJ, Jiao Y, Kim HM, Kim IH. 96 Growth Performance, Nutrient Digestibility, Fecal Microbiota and Fecal Noxious Gas Emission in Weaning Pigs Fed High and Low Density Diet with and without Protected Organic Acid Blends. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S D Upadhaya
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - D J Lee
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - Y Jiao
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - H M Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - I H Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
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19
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Kim JK, Zhang JY, Hao XZ, Kim HM, Kim IH. 92 Effects of Supplemental Phytoncide Instead of Zinc Oxide on Growth Performance, Apparent Nutrient Digestibility, Blood Profiles and Fecal Microflora in Growing Pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J K Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - J Y Zhang
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - X Z Hao
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - H M Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - I H Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
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20
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Sun HY, Kim JK, Kim HM, Park JW, Kim IH. 241 Effect of Non-Dairy Creamer Supplementation to Corn-Soybean Meal Based Diet on Growth Performance, Nutrient Digestibility and Meat Quality in Broilers. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- H Y Sun
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - J K Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - H M Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - J W Park
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
| | - I H Kim
- Department of Animal Resources Science Dankook University, Cheonan-si, Korea, Republic of (South)
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Jeong WJ, So BH, Kim HM, Wee JH, Park JH, Choi SP, Woo SH. The clinical usefulness of initial serum procalcitonin as an aggravation predictor in a hepatobiliary tract infection at emergency department. Niger J Clin Pract 2018; 18:659-63. [PMID: 26096246 DOI: 10.4103/1119-3077.158973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND OBJECTIVES The ability to predict future clinical deterioration early in patients who present to an emergency care center with a hepatobiliary tract infection is difficult. We studied the clinical usefulness of the initial serum levels of procalcitonin in a hepatobiliary tract infection as an indicator for predicting aggravation in the early stages. METHODS Of the patients who presented with the clinical symptoms of a hepatobiliary tract infection, 99 were diagnosed with a hepatobiliary tract infection by imaging studies and subsequently enrolled in the study. Laboratory tests were obtained in the early stage of disease after presentation to an emergency care center. We assessed and compared the serum levels of many early inflammatory markers (white blood cell [WBC] counts, C-reactive protein and procalcitonin) between patients whose symptoms were initially stable upon arrival to an emergency care center but then deteriorated to, those whose symptoms remained consistently stable. Thus, we examined if the above serum markers are useful in predicting the possibility of future symptom aggravation. RESULTS Of a total of 99 patients, 27 were assigned to the symptom aggravation group. The serum levels of WBC counts and C-reactive protein in the aggravation group were elevated. However, the median value (interquartile range) of procalcitonin was relatively increased at 2.28 (0.41-7.84 ng/ml), demonstrating a significant difference. CONCLUSIONS In conclusion, initial serum levels of procalcitonin might be used as an indicator for aggravation in patients with hepatobiliary tract infection at the emergency department, even though there is hemodynamic stability.
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Affiliation(s)
| | - B H So
- Department of Emergency Medicine, College of Medicine, The Catholic University of Korea, St. Vincent Hospital, Suwon, Korea
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22
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Shin JS, Sun K, Son HS, Kim HM, Kim KT, Ahn SS, Park SY, Rho YR, Lee HS, Min BG. A Preclinical Cadaver Fitting Study of Implantable Biventricular Assist Device - AnyHeart™. Int J Artif Organs 2018; 27:495-500. [PMID: 15293355 DOI: 10.1177/039139880402700608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A multifunctional, Korean-made artificial heart (AnyHeart™) was developed, and prior to its clinical application, a cadaver-fitting study was performed. The study proposed to determine the optimal cannulation approach, implantation technique and route of the cannula to minimize the organ compression of AnyHeart™. The anatomical feasibility and a variety of surgical techniques were evaluated using ten preserved, human cadavers. Implanting AnyHeart™ with ease is possible using various approaches, including a median sternotomy, and a right or left lateral thoracotomy. The lateral thoracotomy approach is shown to be safe and reproducible, especially in patients who have already undergone an operation that used a median sternotomy. The results of this study will guide improvements in the designs of cannulae and AnyHeart™ for future clinical applications.
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Affiliation(s)
- J S Shin
- Department of Thoracic and Cardiovascular Surgery, College of Medicine and Cardiovascular Institute of Medical Science Research Center, Korea University, Seoul, Korea
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Kim HM, Lee BR, Lee ES, Kwon MH, Huh JH, Kwon BE, Park EK, Chang SY, Kweon MN, Kim PH, Ko HJ, Chung CH. iNKT cells prevent obesity-induced hepatic steatosis in mice in a C-C chemokine receptor 7-dependent manner. Int J Obes (Lond) 2017; 42:270-279. [PMID: 28811651 PMCID: PMC5803573 DOI: 10.1038/ijo.2017.200] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/19/2017] [Accepted: 07/21/2017] [Indexed: 02/08/2023]
Abstract
Non-alcoholic fatty liver disease and non-alcoholic steatohepatitis are characterized by an increase in hepatic triglyceride content with infiltration of immune cells, which can cause steatohepatitis and hepatic insulin resistance. C-C chemokine receptor 7 (CCR7) is primarily expressed in immune cells, and CCR7 deficiency leads to the development of multi-organ autoimmunity, chronic renal disease and autoimmune diabetes. Here, we investigated the effect of CCR7 on hepatic steatosis in a mouse model and its underlying mechanism. Our results demonstrated that body and liver weights were higher in the CCR7−/− mice than in the wild-type (WT) mice when they were fed a high-fat diet. Further, glucose tolerance and insulin sensitivity were markedly diminished in CCR7−/− mice. The number of invariant natural killer T (iNKT) cells was reduced in the livers of the CCR7−/− mice. Moreover, liver inflammation was detected in obese CCR7−/− mice, which was ameliorated by the adoptive transfer of hepatic mononuclear cells from WT mice, but not through the transfer of hepatic mononuclear cells from CD1d−/− or interleukin-10-deficient (IL-10−/−) mice. Overall, these results suggest that CCR7+ mononuclear cells in the liver could regulate obesity-induced hepatic steatosis via induction of IL-10-expressing iNKT cells.
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Affiliation(s)
- H M Kim
- Department of Global Medical Science, Yonsei University Wonju College of Medicine, Wonju, Korea.,Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - B R Lee
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Korea
| | - E S Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - M H Kwon
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - J H Huh
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - B-E Kwon
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Korea
| | - E-K Park
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Korea
| | - S-Y Chang
- College of Pharmacy, Ajou University, Suwon, Korea
| | - M-N Kweon
- Mucosal Immunology Laboratory, Department of Convergence Medicine, University of Ulsan College of Medicine/Asan Medical Center, Seoul, Korea
| | - P-H Kim
- Department of Molecular Bioscience, School of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - H-J Ko
- Laboratory of Microbiology and Immunology, College of Pharmacy, Kangwon National University, Chuncheon, Korea
| | - C H Chung
- Department of Global Medical Science, Yonsei University Wonju College of Medicine, Wonju, Korea.,Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
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Chang YH, Shin YA, Kim JH, Kim HM, Lee DW, Chung HK, Kim SJ, Kim CD, Lee JH, Seo YJ, Im M, Lee Y. Use of whole-exome sequencing to determine the genetic basis of signs of skin youthfulness in Korean women. J Eur Acad Dermatol Venereol 2017; 31:e138-e141. [PMID: 27510323 DOI: 10.1111/jdv.13904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y H Chang
- LG Household and Healthcare, Daejeon, Korea
| | - Y A Shin
- Theragen-Etex Bio Institute, Advanced Institute of Convergence Technology, Suwon, Korea
| | - J H Kim
- Theragen-Etex Bio Institute, Advanced Institute of Convergence Technology, Suwon, Korea
| | - H M Kim
- Theragen-Etex Bio Institute, Advanced Institute of Convergence Technology, Suwon, Korea
| | - D W Lee
- Theragen-Etex Bio Institute, Advanced Institute of Convergence Technology, Suwon, Korea
| | - H K Chung
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - S J Kim
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - C D Kim
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - J H Lee
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - Y J Seo
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - M Im
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - Y Lee
- Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, Korea
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Jagsi R, Momoh AO, Qi J, Hamill JB, Billig J, Kim HM, Pusic AL, Wilkins EG. Abstract S3-07: Impact of radiotherapy on complications and patient-reported satisfaction with breast reconstruction: Findings from the prospective multicenter MROC study. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-s3-07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Patients considering both post-mastectomy radiation (RT) and reconstruction require robust information regarding the expected outcomes of different combinations of approaches in order to make preference-concordant decisions.
Methods: In a prospective multicenter cohort study (the Mastectomy Reconstruction Outcomes Consortium, MROC, funded by NCI 1RO1CA152192) of women diagnosed with breast cancer at 11 institutions between 2012-15, we compared responses of 553 radiated and 1461 non-radiated pts who received different approaches to reconstruction. The primary dependent variables of interest were development of any breast complications (e.g. hematoma, wound infection) by one year post-reconstruction, along with satisfaction measured with the validated BREAST-Q instrument. Mixed-effects regression models assessed impact of reconstruction type and RT on the outcomes of interest. Covariate adjustment included reconstruction timing, age, extent of disease, bilateral vs unilateral treatment, chemotherapy receipt, nodal management, BMI, smoking, diabetes, race, ethnicity, education, employment, income, marital status, and hospital site.
Results: Median age was 49. Bilateral mastectomy was received by 45.6% of radiated and 53.3% of non-radiated pts (p=0.002). Autologous reconstruction was more commonly received by radiated pts (38.3% vs 25.1%, p<0.001). Immediate reconstruction was less common in radiated pts (82.6% vs 95.6%, p<0.001). By one year, at least one complication occurred in 28.8% of radiated pts (30.8% of implant pts and 25.5% of autologous pts) and 22.3% of non-radiated pts (20.4% of implant pts and 28.1% of autologous pts). Among pts with ≥2 years of follow up, a complication had occurred by 2 years in 34.1% of 331 radiated pts vs 22.5% of 946 non-radiated pts. Multivariable analysis showed immediate reconstruction, bilateral treatment, & higher BMI to be predictive of developing a complication by one year. RT effect differed by reconstruction type; RT was associated with 2.1 (95% CI = 1.45, 3.10) times higher odds of complication in implant pts, while showing no difference in autologous pts (OR=1.3, 95% CI = 0.76, 2.09). RT effect on patient outcomes also differed by reconstruction types. In implant pts, adjusted mean BREAST-Q satisfaction with breast scores were significantly lower in radiated pts than in non-radiated pts (51.5 vs. 58.0 at 1 year, p<.001; 48.9 vs. 59.8 at 2 years, p<.001), while satisfaction in autologous pts did not differ by radiation (61.3 in radiated vs. 63.5 in non-radiated at 1 year; 62.8 vs. 65.8 at 2 years). Similarly, in implant pts, satisfaction with outcomes was significantly lower in radiated versus non-radiated pts (66.5 vs. 70.8 at 1 year; p=0.03; 64.4 vs. 70.6 at 2 years, p =0.03), while there were no significant differences in autologous pts (72.7 vs. 75.2 in radiated vs. non-radiated at 1 year; 71.3 and 75.3 at year 2).
Conclusions: In the largest prospective multicenter study of outcomes of breast reconstruction to date, autologous reconstruction appears to yield superior patient-reported outcomes and lower risk of complications than implant-based approaches among patients receiving PMRT.
Citation Format: Jagsi R, Momoh AO, Qi J, Hamill JB, Billig J, Kim HM, Pusic AL, Wilkins EG. Impact of radiotherapy on complications and patient-reported satisfaction with breast reconstruction: Findings from the prospective multicenter MROC study [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr S3-07.
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Affiliation(s)
- R Jagsi
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - AO Momoh
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - J Qi
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - JB Hamill
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - J Billig
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - HM Kim
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - AL Pusic
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
| | - EG Wilkins
- University of Michigan, Ann Arbor, MI; Memorial Sloan Kettering Cancer Center, New York, NY
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Barnes LAF, Kim HM, Caldwell JM, Buza J, Ahmad CS, Bigliani LU, Levine WN. Satisfaction, function and repair integrity after arthroscopic versus mini-open rotator cuff repair. Bone Joint J 2017; 99-B:245-249. [PMID: 28148668 DOI: 10.1302/0301-620x.99b2.bjj-2016-0055.r1] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 09/16/2016] [Indexed: 11/05/2022]
Abstract
AIMS Advances in arthroscopic techniques for rotator cuff repair have made the mini-open approach less popular. However, the mini-open approach remains an important technique for repair for many surgeons. The aims of this study were to compare the integrity of the repair, the function of the shoulder and satisfaction post-operatively using these two techniques in patients aged > 50 years. PATIENTS AND METHODS We identified 22 patients treated with mini-open and 128 patients treated with arthroscopic rotator cuff repair of July 2007 and June 2011. The mean follow-up was two years (1 to 5). Outcome was assessed using the American Shoulder and Elbow Surgeons (ASES) and Simple Shoulder Test (SST) scores, and satisfaction. The integrity of the repair was assessed using ultrasonography. A power analysis ensured sufficient enrolment. RESULTS There was no statistically significant difference between the age, function, satisfaction, or pain scores (p > 0.05) of the two groups. The integrity of the repair and the mean SST scores were significantly better in the mini-open group (91% of mini-open repairs were intact versus 60% of arthroscopic repairs, p = 0.023; mean SST score 10.9 (standard deviation (sd) 1.3) in the mini-open group; 8.9 (sd 3.5) in arthroscopic group; p = 0.003). The ASES scores were also higher in the mini-open group (mean ASES score 91.0 (sd 10.5) in mini-open group; mean 82.70 (sd 19.8) in the arthroscopic group; p = 0.048). CONCLUSION The integrity of the repair and function of the shoulder were better after a mini-open repair than after arthroscopic repair of a rotator cuff tear in these patients. The functional difference did not translate into a difference in satisfaction. Mini-open rotator cuff repair remains a useful technique despite advances in arthroscopy. Cite this article: Bone Joint J 2017;99-B:245-9.
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Affiliation(s)
| | - H M Kim
- Penn State University Medical Center, Hershey, PA, USA
| | - J-M Caldwell
- Columbia University Medical Center, New York, NY, USA
| | - J Buza
- New York University School of Medicine, New York, NY, USA
| | - C S Ahmad
- Columbia University Medical Center, New York, NY, USA
| | - L U Bigliani
- Columbia University Medical Center, New York, NY, USA
| | - W N Levine
- Columbia University Medical Center, New York, NY, USA
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Janevic MR, Piette JD, Ratz DP, Kim HM, Rosland AM. Correlates of family involvement before and during medical visits among older adults with high-risk diabetes. Diabet Med 2016; 33:1140-8. [PMID: 26642179 PMCID: PMC4896854 DOI: 10.1111/dme.13045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/26/2015] [Indexed: 11/27/2022]
Abstract
AIMS To examine the characteristics of patients with diabetes who regularly receive help from a supporter in preparing for and attending medical visits, and the association between this help and clinical risk factors for diabetes complications. METHODS We linked survey data about family involvement for patients in the Veterans Health Administration system with poorly controlled Type 2 diabetes (n = 588; mean 67 years; 97% male) with health record data on blood pressure, glycaemic control and prescription-fill gaps. We used multivariable regression to assess whether supporter presence and, among patients with supporters, supporter role (visit preparation, accompaniment to medical visit or no involvement) were associated with concurrent trends in clinical risk factors over 2 years, adjusting for sociodemographic and health characteristics. RESULTS Most patients (78%) had a main health supporter; of these, more had regular support for preparing for appointments (69%) than were regularly accompanied to them (45%). Patients with preparation help only were younger and more educated than accompanied patients. Support presence and type was not significantly associated with clinical risk factors. CONCLUSIONS Family help preparing for appointments was common among these patients with high-risk diabetes. In its current form, family support for medical visits may not affect clinical factors in the short term. Supporters helping patients engage in medical visits may need training and assistance to have an impact on the clinical trajectory of patients with diabetes.
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Affiliation(s)
- M R Janevic
- Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - J D Piette
- Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, MI, USA
- VA Ann Arbor Center for Clinical Management Research, Ann Arbor, MI, USA
| | - D P Ratz
- VA Ann Arbor Center for Clinical Management Research, Ann Arbor, MI, USA
| | - H M Kim
- Center for Statistical Consultation and Research, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - A-M Rosland
- VA Ann Arbor Center for Clinical Management Research, Ann Arbor, MI, USA
- Division of General Internal Medicine, University of Michigan, Ann Arbor, MI, USA
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Choi JA, Jung YS, Kim JY, Kim HM, Lim IK. Inhibition of breast cancer invasion by TIS21/BTG2/Pc3-Akt1-Sp1-Nox4 pathway targeting actin nucleators, mDia genes. Oncogene 2016; 35:83-93. [PMID: 25798836 DOI: 10.1038/onc.2015.64] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 01/18/2015] [Accepted: 01/30/2015] [Indexed: 02/06/2023]
Abstract
The mammalian homolog of Drosophila diaphanous (mDia), actin nucleator, has been known to participate in the process of invasion and metastasis of cancer cells via regulating a number of actin-related biological processes. We have previously reported that tumor suppressor TIS21(/BTG2/Pc3) (TIS21) inhibits invadopodia formation by downregulating reactive oxygen species (ROS) in MDA-MB-231 cells. We herein report that TIS21(/BTG2/Pc3) downregulates diaphanous-related formin (DRF) expression via reducing NADPH oxidase 4 (Nox4)-derived ROS generation by Akt1 activation and subsequently impairs invasion activity of the highly invasive breast cancer cells. Knockdown of Akt1 by RNA interference recovered the TIS21(/BTG2/Pc3)-inhibited F-actin remodeling and ROS generation by recovering Nox4 expression. Furthermore, Sp1-mediated Nox4 transcription was downregulated by TIS21(/BTG2/Pc3)-Akt1 signals, leading to the inhibition of cancer cell invasion via F-actin remodeling by mDia genes. To our best knowledge, this is the first study to show that TIS21(/BTG2/Pc3)-Akt1 inhibited Sp1-Nox4-ROS cascade, subsequently reducing invasion activity via inhibition of mDia family genes.
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Affiliation(s)
- J-A Choi
- Departments of Biochemistry and Molecular Biology, Ajou University School of Medicine, and Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Korea
| | - Y S Jung
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
| | - J Y Kim
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
| | - H M Kim
- Department of Energy Systems Research, Ajou University, Suwon, Korea
| | - I K Lim
- Departments of Biochemistry and Molecular Biology, Ajou University School of Medicine, and Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Korea
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Suh JY, Jo YS, Choi JH, Kim HM. Can focused echocardiographic evaluation in life support (FEEL) be used to predict resuscitation outcome or termination of resuscitation (TOR)? A prospective trial. Crit Ultrasound J 2015. [PMCID: PMC4401501 DOI: 10.1186/2036-7902-7-s1-a24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kim HM, Lim KW. Teachers" Opinions on Majoring Course of Special School Admission System. jvr 2015. [DOI: 10.24226/jvr.2015.08.25.2.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lee JM, Kim HM, Kim JH. The Effects of Depression, Cognitive Function, and Activities of Daily Living on Quality of Life for Patients with Stroke. ACTA ACUST UNITED AC 2015. [DOI: 10.18598/kcbot.2015.05.01.01] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kim BJ, Ahn SH, Kim HM, Lee SH, Koh JM. Low skeletal muscle mass associates with low femoral neck strength, especially in older Korean women: the Fourth Korea National Health and Nutrition Examination Survey (KNHANES IV). Osteoporos Int 2015; 26:737-47. [PMID: 25391247 DOI: 10.1007/s00198-014-2959-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 10/28/2014] [Indexed: 02/07/2023]
Abstract
SUMMARY Data gathered from a nationally representative cohort demonstrated that subject with low skeletal muscle mass had consistently low femoral neck composite strength indices for compression, bending, and impact, especially in older women, supporting the highly integrated nature of skeletal muscle and bone. INTRODUCTION Skeletal muscle and bone interact mechanically and functionally. The present study was performed to investigate the association between muscle mass and femoral neck composite strength indices using a nationally representative cohort. METHODS This is a population-based, cross-sectional study from Korea National Health and Nutrition Examination Surveys, including 1,275 Koreans (674 women and 601 men) aged 50 years or older. Femoral neck axis length and width were measured by hip DXA scans and were combined with BMD, body weight, and height to create composite indices of femoral neck strength relative to load in three different failure modes: compression, bending, and impact. Presarcopenia was defined as an appendicular skeletal muscle mass (ASM) divided by body weight that was less than 1 SD below the sex-specific mean for young adults. RESULTS After adjusting for confounders, women with presarcopenia had consistently lower indices for compression strength (CSI), bending strength (BSI), and impact strength (ISI) than women without this condition. Men with presarcopenia had a lower ISI value than men without presarcopenia. Multiple regression analyses revealed that lower relative skeletal muscle mass (ASM/weight) associated significantly with lower values for all three femoral neck composite indices in women and with lower CSI and ISI in men. CONCLUSIONS These findings provide the first clinical evidence for the notion that age-related low muscle mass may increase the risk of osteoporotic hip fractures by decreasing femoral neck strength relative to load, especially in older women, and support the highly integrated nature of skeletal muscle and bone.
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Affiliation(s)
- B-J Kim
- Division of Endocrinology and Metabolism, Asan Medical Center, University of Ulsan College of Medicine, 388-1 Poongnap2-Dong Songpa-Gu, 138-736, Seoul, South Korea
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Park SJ, Oh J, Kim YK, Park JH, Park JY, Hong HK, Park KH, Lee JE, Kim HM, Chung JY, Woo SJ. Intraocular pharmacokinetics of intravitreal vascular endothelial growth factor-Trap in a rabbit model. Eye (Lond) 2015; 29:561-8. [PMID: 25592118 DOI: 10.1038/eye.2014.329] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/07/2014] [Indexed: 12/22/2022] Open
Abstract
PURPOSE To determine intraocular pharmacokinetic properties of intravitreally injected vascular endothelial growth factor (VEGF)-Trap in a rabbit model. METHODS VEGF-Trap was intravitreally injected in 18 rabbit eyes. Eyes were enucleated 1 h and 1, 2, 5, 14, and 30 days after injections and immediately frozen at -80 °C. Concentration of VEGF-Trap in vitreous, aqueous humor, and retina/choroid was determined using an indirect enzyme-linked immunosorbent assay and analyzed to obtain pharmacokinetic properties. RESULTS Maximum concentration of VEGF-Trap was achieved at 1 h in all three tissues. A one-compartment model of distribution was selected as the final model for all tissues studied. Estimated half-life of VEGF-Trap in vitreous, aqueous humor, and retinal/choroid was 87.1, 36.8, and 35.0 h, respectively, and estimated mean residence time was 125.7, 53.1, and 50.5 h, respectively. Area under the curve from time 0 to the end point was 10009.8, 3945.1, and 1189.3, respectively. Total exposure of the aqueous humor and retina/choroid to VEGF-Trap was 39.4% and 11.9% of vitreous exposure, respectively. CONCLUSION The vitreous half-life of VEGF-Trap is 3.63 days. This is shorter than that of bevacizumab (6.99 days) and longer than that of ranibizumab (2.51 days), as shown in studies using the same experimental settings. The concentration of VEGF-Trap peaked at 1 h after injections in all eye tissues studied.
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Affiliation(s)
- S J Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J Oh
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Bundang Hospital, Seongnam, Republic of Korea
| | - Y-K Kim
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J H Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J Y Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - H K Hong
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - K H Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J-E Lee
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - H M Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - J Y Chung
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Bundang Hospital, Seongnam, Republic of Korea
| | - S J Woo
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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Kuo S, Zhou Y, Kim HM, Kato H, Kim RY, Bayar GR, Marcelo CL, Kennedy RT, Feinberg SE. Biochemical indicators of implantation success of tissue-engineered oral mucosa. J Dent Res 2014; 94:78-84. [PMID: 25348542 DOI: 10.1177/0022034514554225] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Real-time (RT) determination of the health of in vitro tissue-engineered constructs prior to grafting is essential for prediction of success of the implanted tissue-engineered graft. In addition, the US Food and Drug Administration requires specific release criteria in RT prior to the release of tissue-engineered devices for human use. In principle, assessing the viability and functionality of the cellular component can be achieved by quantifying the secretion of growth factors and chemokines of tissue-engineered constructs. Ex vivo-produced oral mucosa equivalents (EVPOMEs) were fabricated under thermally stressed conditions at 43 °C for 24 h to create a functionally compromised EVPOME. We used microchannel enzyme-linked immunosorbent assay to evaluate the functionality of the cellular component, oral keratinocytes, of stressed and unstressed EVPOMEs by measuring the release of vascular endothelial growth factor (VEGF), interleukin-8 (IL-8), human β-defensin 1 (hBD-1), and tissue inhibitor of metalloproteinase 1 and 2 (TIMP-1 and -2) into the spent medium, which was collected on the same day prior to graft implantation into severe combined immunodeficiency mice. Implanted EVPOMEs' histology on the seventh postimplantation day was used to correlate outcomes of grafting to secreted amounts of IL-8, hBD-1, VEGF, TIMP-1, and TIMP-2 from corresponding EVPOMEs. Our findings showed that significantly higher levels of IL-8, hBD-1, and TIMP-2 were secreted from controls than from thermally stressed EVPOMEs. We also found a direct correlation between secreted VEGF and IL-8 and blood vessel counts of implanted EVPOMEs. We concluded that measuring the constitutive release of these factors can be used as noninvasive predictors of healthy tissue-engineered EVPOMEs in RT, prior to their implantation.
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Affiliation(s)
- S Kuo
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Y Zhou
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - H M Kim
- Center for Statistical Consultation and Research, University of Michigan, Ann Arbor, MI, USA
| | - H Kato
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - R Y Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, MI, USA Department of Surgery, Medical School, University of Michigan, Ann Arbor, MI, USA
| | - G R Bayar
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - C L Marcelo
- Department of Surgery, Medical School, University of Michigan, Ann Arbor, MI, USA
| | - R T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - S E Feinberg
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, MI, USA Department of Surgery, Medical School, University of Michigan, Ann Arbor, MI, USA
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Kim HM, So BH, Jeong WJ, Choi SM, Park KN. The effectiveness of ultrasonography in verifying the placement of a nasogastric feeding tube in patients with low consciousness at an emergency center. Crit Ultrasound J 2014. [PMCID: PMC4101373 DOI: 10.1186/2036-7902-6-s1-a16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Killian ML, Lim CT, Thomopoulos S, Charlton N, Kim HM, Galatz LM. The effect of unloading on gene expression of healthy and injured rotator cuffs. J Orthop Res 2013; 31:1240-8. [PMID: 23508698 PMCID: PMC3690165 DOI: 10.1002/jor.22345] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 02/12/2013] [Indexed: 02/04/2023]
Abstract
Tendon unloading following rupture of one of the rotator cuff tendons can induce alterations in muscle physiology and tendon structure, which can subsequently affect reparability and healing potential. Yet little is known about the effects of muscle and tendon unloading on the molecular response of the rotator cuff. We determined the effect of mechanical unloading on gene expression and morphology of healthy supraspinatus tendons and muscles, and the same muscles after acute injury and repair. Mechanical unloading was achieved by tenotomy and/or botulinum toxin A (BTX) chemical denervation in a rat rotator cuff model of injury and repair. Gene expression profiles varied across regions of the muscle, with the greatest changes seen in the distal aspect of the muscle for most genes. Myogenic and adipogenic genes were upregulated in muscle when unloaded (tenotomy and BTX). Tendon injury, with and without repair, resulted in upregulation of fibrosis- and tendon-specific gene expression. The expression of scleraxis, a transcription factor necessary for tendon development, was upregulated in response to injury and repair. In summary, tendon detachment and repair had the greatest effect on tendon gene expression, while unloading had the greatest effect on muscle gene expression.
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Affiliation(s)
- ML Killian
- Department of Orthopaedic Surgery, Washington University, St Louis, MO
| | - CT Lim
- Department of Orthopaedic Surgery, Sung-Ji Hospital, Gangwon-do, South Korea
| | - S Thomopoulos
- Department of Orthopaedic Surgery, Washington University, St Louis, MO
| | - N Charlton
- Department of Orthopaedic Surgery, Washington University, St Louis, MO
| | - HM Kim
- Department of Orthopaedic Surgery, Penn State University Hershey, Hershey, PA
| | - LM Galatz
- Department of Orthopaedic Surgery, Washington University, St Louis, MO
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Shin JA, Han G, Park SK, Lee K, Kim HJ, Cho SD, Kim HM. The in vitro apoptotic effects of A248 and A1659, newly synthetic histone deacetylase inhibitors in oral cancer cells. Oral Dis 2013; 20:482-9. [PMID: 23848057 DOI: 10.1111/odi.12161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 05/28/2013] [Accepted: 06/25/2013] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Histone deacetylase (HDAC) inhibitors represent potential therapeutic agents against various cancers. In this study, we attempt to identify whether newly synthesized HDAC inhibitors, A248 and A1659, can be effective anti-cancer drug candidates for oral cancer. MATERIALS AND METHODS The anti-cancer activities of A248 and A1659 in MC-3 and HN22 human oral cancer cells were evaluated by 3-(4,5-dimethylthiazol-20yl)-(3-carboxymethoxyphenyl)-2-(4-sulphophenyl)-2H-tetrazolium (MTS) assay, 4'-6-diamidino-2-phenylindole (DAPI) staining, Western blot analysis, immunocytochemistry, and small interference RNA (siRNA) technology. RESULTS A248 and A1659 enhanced histone acetylation and decreased the viability of MC-3 and HN22 cells. A248 and A1659 also induced apoptosis, as evidenced by altered nuclear features and poly(ADP-ribose)polymerase (PARP) cleavage. A248 and A1659 markedly decreased Sp1 expression in a concentration- or time-dependent manner and blocked nuclear translocation of Sp1 protein from the cytosol, which contributed to an increase in p27 expression and a decrease in cyclin D1 expression. Furthermore, the knockdown of Sp1 protein with siRNA caused marked alteration of p27 and cyclin D1 expression to induce apoptosis. The most popular HDAC inhibitor, trichostatin A (TSA) also induced apoptosis and reduced the expression level of Sp1 protein. CONCLUSION These results suggest that A248 and A1659, two new HDAC inhibitors, may be attractive therapeutic drug candidates for targeting Sp1 in human oral cancer cells.
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Affiliation(s)
- J-A Shin
- Department of Oral Pathology, School of Dentistry, Institute of Oral Bioscience, Chonbuk National University, Jeonju, Korea
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Kim HM, Lim YY, Kim MY, Son IP, Kim DH, Park SR, Seo SK, Lee MS, Mun SK, Kim CW, Kim BJ. Inhibitory effect of tianeptine on catagen induction in alopecia areata-like lesions induced by ultrasonic wave stress in mice. Clin Exp Dermatol 2013; 38:758-67. [PMID: 23581888 DOI: 10.1111/ced.12047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2012] [Indexed: 11/29/2022]
Abstract
BACKGROUND Alopecia areata (AA) is characterized by rapid and complete hair loss in one or multiple areas of the scalp. Stress is an important triggering factor in AA. AIM To identify the inhibitory effect of tianeptine on catagen induction in C57BL/6 mice with AA-like lesions induced by ultrasonic wave stress (UWS). METHODS The mice were divided into four groups. Group 1 received oral tianeptine before and after UWS; group 2 received oral tianeptine only after UWS; group 3 was given UWS treatment only; and group 4 (negative control group) was not given any treatment. Phototrichigraphy and dermatoscopy were used for assessment. Histological analysis was performed using haematoxylin and eosin, toluidine blue, Masson trichrome and Verhoeff-van Gieson stains. Immunohistochemical analysis was also performed. The level of apoptosis and expression of neuropeptides in the skin were assessed by terminal deoxynucleotidyl transferase dUTP nick end labelling and immunofluorescence assays. RESULTS Mice in group 1 had an increased rate of hair growth and greater hair-shaft thickness compared with mice in groups 2 and 3. In addition, mice in group 1 had a higher number of anagen hair follicles, increased synthesis of collagen and elastic fibres, decreased mast-cell degranulation, reduction in cell apoptosis in hair follicles, and recovery of vitamin D receptor expression. Expression of neuropeptides (substance P, calcitonin gene-related peptide) was not altered. CONCLUSIONS Tianeptine might play a role in suppressing catagen induction in a stress-induced AA mouse model.
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Affiliation(s)
- H M Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
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Kim HM, Lee GH, Kuh HJ, Kwak BK, Lee J. Liposomal doxorubicin-loaded chitosan microspheres capable of controlling release of doxorubicin for anti-cancer chemoembolization: in vitro characteristics. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50042-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Huong LD, Shin JA, Choi ES, Cho NP, Kim HM, Leem DH, Cho SD. β-Phenethyl isothiocyanate induces death receptor 5 to induce apoptosis in human oral cancer cells via p38. Oral Dis 2012; 18:513-9. [PMID: 22309674 DOI: 10.1111/j.1601-0825.2012.01905.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES β-Phenylethyl isothiocyanate (PEITC) has been demonstrated to fight many types of cancers through various molecular pathways. In this study, we focused on its effect on the induction of apoptosis to inhibit cell growth and molecular mechanism in oral cancer. MATERIALS AND METHODS 3-(4,5-dimethylthiazol-2-yl)-5-(2,4-disulfophenyl)-2-(4 sulfophenyl)-2H-tetrazolium (MTS) assay was used to examine cell viability. The apoptotic effect was investigated using 4'-6-Diamidino-2-phenylindole (DAPI) staining or Western blotting. Inhibitors were used to determine the molecular target and mechanism of PEITC-mediated apoptosis. RESULTS β-Phenylethyl isothiocyanate inhibited the growth of HN22 human oral cancer cells and induced caspase-dependent apoptosis in HN22 cells as evidenced by nuclear fragmentation and the activation of caspase 3. It increased cleaved caspase 8, truncated BID, and death receptor 5 (DR5) through the activation of p38 MAPK. This result was confirmed by blockage of PEITC-induced cleavages of Poly(ADP-ribose) Polymerase, caspase-3, caspase-8, and DR5 by p38 MAPK inhibitor, SB203580. We also found that PEITC activated p38 and augmented DR5 to induce apoptosis in other human oral cancer cells. CONCLUSIONS These results suggest that DR5 is a potential molecular target for PEITC-induced apoptosis in oral cancer via p38 MAPK.
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Affiliation(s)
- L D Huong
- Department of Oral Pathology, School of Dentistry, Institute of Oral Bioscience, Brain Korea 21, Chonbuk National University, Jeonju, Jeonju, Korea
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Aasly JO, Shi M, Sossi V, Stewart T, Johansen KK, Wszolek ZK, Uitti RJ, Hasegawa K, Yokoyama T, Zabetian CP, Kim HM, Leverenz JB, Ginghina C, Armaly J, Edwards KL, Snapinn KW, Stoessl AJ, Zhang J. Cerebrospinal fluid amyloid β and tau in LRRK2 mutation carriers. Neurology 2011; 78:55-61. [PMID: 22170881 DOI: 10.1212/wnl.0b013e31823ed101] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE The goal of the current investigation was to examine a cohort of symptomatic and asymptomatic LRRK2 mutation carriers, in order to address whether the reported alterations in amyloid β (Aβ) and tau species in the CSF of patients with sporadic Parkinson disease (PD) are a part of PD pathogenesis, the aging process, or a comorbid disease in patients with PD, and to explore the possibility of Aβ and tau as markers of early or presymptomatic PD. METHODS CSF Aβ42, total tau, and phosphorylated tau were measured with Luminex assays in 26 LRRK2 mutation carriers, who were either asymptomatic (n = 18) or had a phenotype resembling sporadic PD (n = 8). All patients also underwent PET scans with 18F-6-fluoro-l-dopa (FD), 11C-(±)-α-dihydrotetrabenazine (DTBZ), and 11C-d-threo-methylphenidate (MP) to measure dopaminergic function in the striatum. The levels of CSF markers were then compared to each PET measurement. RESULTS Reduced CSF Aβ42 and tau levels correlated with lower striatal dopaminergic function as determined by all 3 PET tracers, with a significant association between Aβ42 and FD uptake. When cases were restricted to carriers of the G2019S mutation, the most common LRRK2 variant in our cohort, significant correlations were also observed for tau. CONCLUSIONS The disposition of Aβ and tau is likely important in both LRRK2-related and sporadic PD, even during early phases of the disease. A better understanding of their production, aggregation, and degradation, including changes in their CSF levels, may provide insights into the pathogenesis of PD and the potential utility of these proteins as biomarkers.
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Affiliation(s)
- J O Aasly
- Department of Neurology, St. Olav’s University Hospital, Trondheim, Norway
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Song YJ, Kim DG, Nam HM, Lee JB, Park SY, Song CS, Seo KH, Kim HM, Choi IS. Evaluation of the efficacy of immunocastration vaccine composed of gonadotrophin-releasing hormone conjugated with Salmonella typhimurium flagellin in rats. Reprod Domest Anim 2011; 47:e47-50. [PMID: 22044754 DOI: 10.1111/j.1439-0531.2011.01931.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Immunocastration is an alternative method to replace surgical castration that is commonly performed in domestic and pet animals. In this study, a new immunocastration vaccine was developed, and its efficacy was evaluated in male rats. Six tandem copies of gonadotrophin-releasing hormone (GnRH) peptide were genetically fused to Salmonella typhimurium flagellin fljB (STF2) that is a ligand of toll-like receptor 5 (TLR5). The recombinant STF2-GnRH protein expressed in Escherichia coli was used as the immunocastration vaccine. Sixteen male rats were equally assigned to four groups. Excluding the control rats, three groups were immunized with 100, 200 and 400 μg of the STF2-GnRH vaccine, respectively. All of the immunized rats developed significantly higher titres of antibodies to GnRH than the control rats. The size and weight of both testes and epididymides from the immunized rats were significantly smaller than those of the control rats. Testicular tissues in the immunized rats demonstrated atrophy of seminiferous tubules and decreased numbers of both spermatogonia and spermatocytes. These data indicate that the newly developed STF2-GnRH vaccine has a potent immunogenicity to GnRH and efficiently suppresses the development of testes in rats.
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Affiliation(s)
- Y J Song
- Department of Infectious Diseases, College of Veterinary Medicine, Seoul, Korea
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Kim SYH, Kim HM, Knopman DS, De Vries R, Damschroder L, Appelbaum PS. Effect of public deliberation on attitudes toward surrogate consent for dementia research. Neurology 2011; 77:2097-104. [PMID: 21975207 DOI: 10.1212/wnl.0b013e31823648cb] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To assess the informed, deliberative views of the older general public toward a policy of allowing surrogate consent for Alzheimer disease (AD) research. METHODS A total of 503 persons aged 50+ recruited by random digit dialing were randomly assigned to 1 of 3 groups: deliberation, education, or control. The deliberation group attended an all-day education/peer deliberation session; the education group received written information only. Participants were surveyed at baseline, after deliberation session (or equivalent time), and 1 month after the session, regarding their attitudes toward a policy of allowing surrogate consent for research studies of varying risks and potential benefits (a lumbar puncture study, a drug randomized controlled trial, a vaccine randomized controlled trial, and an early phase gene transfer trial). RESULTS At baseline, a policy of surrogate consent for AD research was supported by 55%-91%, depending on the scenario. The education group had a transient increase in support for one research scenario after receiving the information materials. In the deliberation group, support for surrogate consent was higher after deliberation for all scenarios (67% to 97%), with much of the increase sustained 1 month after the deliberation session. No changes occurred in the control group. The study's limitations include self-selection of participants due to the demanding nature of attendance at the deliberation sessions. CONCLUSIONS This sample of the older general public generally supported a policy of surrogate consent for AD research at baseline. Their support increased with democratic deliberation involving informed, in-depth exploration of the relevant scientific and ethical issues.
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Affiliation(s)
- S Y H Kim
- Center for Bioethics and Social Sciences in Medicine, University of Michigan, Ann Arbor 48109, USA
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Lee K, Park SK, Kwon BM, Kim K, Yu HE, Ryu J, Oh SJ, Lee KS, Kang JS, Lee CW, Kwon MG, Kim HM. Transport and metabolism of the antitumour drug candidate 2'-benzoyloxycinnamaldehyde in Caco-2 cells. Xenobiotica 2010; 39:881-8. [PMID: 19925380 DOI: 10.3109/00498250903216000] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The transport and metabolism of the antitumour drug candidate 2'-benzoyloxycinnamaldehyde (BCA) was characterized in Caco-2 cells. BCA disappeared rapidly from the donor side without being transported to the receiver side during its absorptive transport across Caco-2 cells. Its metabolites 2'-hydroxycinnamaldehyde (HCA) and o-coumaric acid (OCA) were formed in both the donor and the receiver sides. HCA, in a separate study, also disappeared rapidly from the donor side, mostly being converted to its oxidative metabolite OCA during its absorptive transport across Caco-2 cells. OCA was transported rapidly in the absorptive direction across Caco-2 cells with a P(app) of 25.4 +/- 1.0 x 10(-6) cm s(-1) (mean +/- standard deviation (SD), n = 3). OCA was fully recovered from both the donor and the receiver side throughout the time-course of this study. Formation of HCA from BCA was inhibited almost completely by bis(p-nitrophenyl)phosphate (BNPP), a selective inhibitor of carboxylesterases (CES), and phenylmethylsulfonyl fluoride (PMSF), a broad specificity inhibitor of esterases in Caco-2 cells, suggesting that this hydrolytic biotransformation was likely mediated predominantly by CES. Conversion of HCA to OCA was inhibited significantly by isovanillin, a selective inhibitor of aldehyde oxidase (AO). Inhibitors for xanthine oxidase (XO) and aldehyde dehydrogenase (ALDH), which are known to be involved in the oxidation of aldehydes to carboxylic acids, did not have a significant effect on the biotransformation of HCA to OCA in Caco-2 cells. In summary, the present work demonstrates that BCA is hydrolysed rapidly to HCA, followed by subsequent oxidation to OCA, in Caco-2 cells. The results provide a mechanistic understanding of the poor absorption and low bioavailability of BCA after oral administration.
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Affiliation(s)
- K Lee
- Bio-Evaluation Center, KRIBB, Chungbuk, Republic of Korea
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Lee SM, Jeong YH, Kim HM, Park HY, Yoon D, Kim DH, Saeki S, Moon SJ, Kang MJ. Presenilin enhancer-2 (PSENEN), a component of the gamma-secretase complex, is involved in adipocyte differentiation. Domest Anim Endocrinol 2009; 37:170-80. [PMID: 19592191 DOI: 10.1016/j.domaniend.2009.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2009] [Revised: 05/20/2009] [Accepted: 05/23/2009] [Indexed: 11/16/2022]
Abstract
This study was conducted to identify genes expressed during adipocyte differentiation of bovine intramuscular fibroblast-like cells using differential display reverse-transcriptase polymerase chain reaction. The presenilin enhancer-2 (PSENEN) gene was found to be down-regulated during adipocyte differentiation of bovine intramuscular fibroblast-like cells. The ectopic expression of bovine PSENEN in 3T3-L1 reduced adipogenesis and the inhibition of endogenous PSENEN by siRNA induced adipogenesis on d 4 of adipocyte differentiation of 3T3-L1 cells. Interestingly, the expression of gamma-secretase complex gene-related Notch signaling was decreased at d 2 and d 4 during adipocyte differentiation. In addition, expression of the Notch-signaling genes (Notch-1, Hes-1, Pref-1, adipsin) was regulated during adipocyte differentiation by regulation of PSENEN expression. These results suggest that PSENEN plays an important role in adipocyte differentiation and that Notch signaling is involved in adipogenesis.
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Affiliation(s)
- S M Lee
- Department of Animal Science, College of Agriculture and Life Science, Institute of Agricultural Science and Technology, Chonnam National University, Gwangju 500-757, Korea
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Thomopoulos S, Das R, Silva MJ, Sakiyama-Elbert S, Harwood FL, Zampiakis E, Kim HM, Amiel D, Gelberman RH. Enhanced flexor tendon healing through controlled delivery of PDGF-BB. J Orthop Res 2009; 27:1209-15. [PMID: 19322789 PMCID: PMC2916020 DOI: 10.1002/jor.20875] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A fibrin/heparin-based delivery system was used to provide controlled delivery of platelet derived growth factor BB (PDGF-BB) in an animal model of intrasynovial flexor tendon repair. We hypothesized that PDGF-BB, administered in this manner, would stimulate cell proliferation and matrix remodeling, leading to improvements in the sutured tendon's functional and structural properties. Fifty-six flexor digitorum profundus tendons were injured and repaired in 28 dogs. Three groups were compared: (1) controlled delivery of PDGF-BB using a fibrin/heparin-based delivery system; (2) delivery system carrier control; and (3) repair- only control. The operated forelimbs were treated with controlled passive motion rehabilitation. The animals were euthanized at 7, 14, and 42 days, at which time the tendons were assessed using histologic (hyaluronic acid content, cellularity, and inflammation), biochemical (total DNA and reducible collagen crosslink levels), and biomechanical (gliding and tensile properties) assays. We found that cell activity (as determined by total DNA, collagen crosslink analyses, and hyaluronic acid content) was accelerated due to PDGF-BB at 14 days. Proximal interphalangeal joint rotation and tendon excursion (i.e., tendon gliding properties) were significantly higher for the PDGF-BB-treated tendons compared to the repair-alone tendons at 42 days. Improvements in tensile properties were not achieved, possibly due to suboptimal release kinetics or other factors. In conclusion, PDGF-BB treatment consistently improved the functional but not the structural properties of sutured intrasynovial tendons through 42 days following repair.
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Affiliation(s)
- S Thomopoulos
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
| | - R Das
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
| | - MJ Silva
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
| | - S Sakiyama-Elbert
- Washington University, Department of Biomedical Engineering, St Louis, MO
| | - FL Harwood
- University of California San Diego, Department of Orthopaedic Surgery, San Diego, CA
| | - E Zampiakis
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
| | - HM Kim
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
| | - D Amiel
- University of California San Diego, Department of Orthopaedic Surgery, San Diego, CA
| | - RH Gelberman
- Washington University, Department of Orthopaedic Surgery, St Louis, MO
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Jeong HJ, Moon PD, Kim SJ, Seo JU, Kang TH, Kim JJ, Kang IC, Um JY, Kim HM, Hong SH. Activation of hypoxia-inducible factor-1 regulates human histidine decarboxylase expression. Cell Mol Life Sci 2009; 66:1309-19. [PMID: 19266161 DOI: 10.1007/s00018-009-9001-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Histidine decarboxylase (HDC) catalyzes the formation of histamine from histidine. Histamine has various effects in physiological and pathological reactions, such as inflammation, cell growth, and neuro-transmission. We investigated the role of hypoxia-inducible factor (HIF)-1 on hypoxia-induced HDC expression in human mast cell line, HMC-1 cells and mouse bone marrow-derived mast cells (BMMCs). Hypoxia significantly increased histamine production. HDC expression and activity were induced by hypoxia. Additionally, when cells were transfected with a native form of HIF-1alpha, hypoxia could induce higher HDC expression than in the nontransfected cell. HIF-1 binding activity for HDC 5' flanking region (HFR) was similar to that for the hypoxia-responsive element. Using HDC promoter deletion analysis, we also demonstrated that HFR was regulated by HIF-1 activation. In addition, depletion of HIF-1alpha prevents hypoxic induction of HDC in BMMCs. In conclusion, these results demonstrate that hypoxia induces HDC expression by transcriptional mechanisms dependent upon HIF-1.
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Affiliation(s)
- H J Jeong
- Biochip Research Center, Hoseo University, 165 Sechul-ri, Baebang-myun, Asan, Chungnam 336-795, Republic of Korea
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Hwang IC, Kim J, Kim HM, Kim DI, Kim SG, Kim SS, Jang C. Evaluation of Toxicity of Plant Extract Made by Neem and Matrine against Main Pests and Natural Enemies. ACTA ACUST UNITED AC 2009. [DOI: 10.5656/ksae.2009.48.1.087] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
BACKGROUND Research in novel therapies for Alzheimer disease (AD) relies on persons with AD as research subjects. Because AD impairs decisional capacity, informed consent often must come from surrogates, usually close family members. But policies for surrogate consent for research remain unsettled after decades of debate. METHODS We designed a survey module for a random subsample (n = 1,515) of the 2006 wave of the Health and Retirement Study, a biennial survey of a nationally representative sample of Americans aged 51 and older. The participants answered questions regarding one of four randomly assigned surrogate-based research (SBR) scenarios: lumbar puncture study, drug randomized control study, vaccine study, and gene transfer study. Each participant answered three questions: whether our society should allow family surrogate consent, whether one would want to participate in the research, and whether one would allow one's surrogate some or complete leeway to override stated personal preferences. RESULTS Most respondents stated that our society should allow family surrogate consent for SBR (67.5% to 82.5%, depending on the scenario) and would themselves want to participate in SBR (57.4% to 79.7%). Most would also grant some or complete leeway to their surrogates (54.8% to 66.8%), but this was true mainly of those willing to participate. There was a trend toward lower willingness to participate in SBR among those from ethnic or racial minority groups. CONCLUSIONS Family surrogate consent-based dementia research is broadly supported by older Americans. Willingness to allow leeway to future surrogates needs to be studied further for its ethical significance for surrogate-based research policy.
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Affiliation(s)
- S Y H Kim
- Bioethics Program, University of Michigan, Ann Arbor, MI 48109, USA.
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Min SH, Kim DM, Heo YS, Kim YI, Kim HM, Kim J, Han YM, Kim IC, Yoo OJ. New p53 target, phosphatase of regenerating liver 1 (PRL-1) downregulates p53. Oncogene 2008; 28:545-54. [PMID: 18997816 DOI: 10.1038/onc.2008.409] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Most of the p53 target genes, all except MDM2, COP1 and PIRH2, perform functions in apoptosis, differentiation and cell cycle arrest. The aforementioned oncogenes downregulate p53 through a negative feedback mechanism, and thus contribute to tumor development. In this study, we report a new p53 target, PRL-1, which is believed to be a significant regulator in the development and metastasis of a variety of cancer types. Phosphatase of regenerating liver 1 (PRL-1) overexpression reduced the levels of endogenous and exogenous p53 proteins, and inhibited p53-mediated apoptosis. On the other hand, the ablation of PRL-1 by small interfering RNA (siRNA) increased p53 protein levels. The p53 downregulation was mediated by p53 ubiquitination and subsequent proteasomal degradation. Furthermore, p53 ubiquitination by PRL-1 was achieved through two independent pathways, by inducing PIRH2 transcription and by inducing MDM2 phosphorylation through Akt signaling. In addition, we showed that the PRL-1 gene harbors a p53 response element in the first intron, and its transcription is regulated by the p53 protein. These findings imply that the new oncogenic p53 target, PRL-1, may contribute to tumor development by the downregulation of p53 by a negative feedback mechanism.
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Affiliation(s)
- S-H Min
- Department of Biological Sciences, Biomedical Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
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