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Brito S, Heo H, Cha B, Lee SH, Park G, Kwak BM, Seong JK, Lee H, Park JH, Weon BM, Bin BH. The Slc45a4 Gene Regulates Pigmentation in a Manner Distinct from that of the OCA4 Gene Slc45a2. J Invest Dermatol 2024; 144:720-722.e5. [PMID: 37775036 DOI: 10.1016/j.jid.2023.08.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 08/07/2023] [Accepted: 08/15/2023] [Indexed: 10/01/2023]
Affiliation(s)
- Sofia Brito
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Hyojin Heo
- Department of Applied Bio Technology, Graduate School, Ajou University, Suwon, Republic of Korea
| | - Byungsun Cha
- Department of Biological Sciences, Graduate School, Ajou University, Suwon, Republic of Korea
| | - Sang Hun Lee
- Department of Biological Sciences, Graduate School, Ajou University, Suwon, Republic of Korea
| | - Gunwoo Park
- Department of Applied Bio Technology, Graduate School, Ajou University, Suwon, Republic of Korea; Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea
| | - Byeong-Mun Kwak
- Department of Biological Sciences, Graduate School, Ajou University, Suwon, Republic of Korea
| | - Je Kyung Seong
- Laboratory of Developmental Biology and Genomics, BK21 Plus Program for Advanced Veterinary Science, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea; Interdiscplinary Program for Bioinformatics, Seoul National University, Seoul, Republic of Korea; Korea Mouse Phenotyping Center, Seoul National University, Seoul, Republic of Korea
| | - Ho Lee
- Korea Mouse Phenotyping Center, Seoul National University, Seoul, Republic of Korea; Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Republic of Korea
| | - Ji-Hwan Park
- Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea
| | - Byung Mook Weon
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University, Suwon, Republic of Korea
| | - Bum-Ho Bin
- Department of Applied Bio Technology, Graduate School, Ajou University, Suwon, Republic of Korea; Department of Biological Sciences, Graduate School, Ajou University, Suwon, Republic of Korea.
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Lee DH, Heo H, Suh CH, Shim WH, Kim E, Jo S, Chung SJ, Lee CS, Kim HS, Kim SJ. Improved diagnostic performance of susceptibility-weighted imaging with compressed sensing-sensitivity encoding and neuromelanin-sensitive MRI for Parkinson's disease and atypical Parkinsonism. Clin Radiol 2024; 79:e102-e111. [PMID: 37863747 DOI: 10.1016/j.crad.2023.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/07/2023] [Revised: 08/08/2023] [Accepted: 09/18/2023] [Indexed: 10/22/2023]
Abstract
AIM To verify the diagnostic performance of the loss of nigrosome-1 on susceptibility-weighted imaging (SWI) with compressed sensing-sensitivity encoding (CS-SENSE) and neuromelanin on neuromelanin-sensitive (NM) magnetic resonance imaging (MRI) for the diagnosis of Parkinson's disease (PD) and atypical Parkinsonism. MATERIALS AND METHODS A total of 195 patients who underwent MRI between October 2019 and February 2020, including SWI, with or without CS-SENSE, and NM-MRI, were reviewed retrospectively. Two neuroradiologists assessed the loss of nigrosome-1 on SWI and neuromelanin on the NM-MRI. The result of N-3-fluoropropyl-2-beta-carbomethoxy-3-beta-(4-iodophenyl) nortropane positron-emission tomography (PET) was set as the reference standard. RESULTS When CS-SENSE was applied for nigrosome-1 imaging on SWI, the non-diagnostic scan rate was lowered significantly from 19.3% (17/88) to 5.6% (6/107; p=0.004). Diagnosis of PD and atypical Parkinsonism based on the loss of nigrosome-1 on SWI and based on NM-MRI showed good diagnostic value (area under the curve [AUC] 0.821, 95% confidence interval [CI] = 0.755-0.875: AUC 0.832, 95% CI = 0.771-0.882, respectively) with a substantial inter-reader agreement (κ = 0.791 and 0.681, respectively). Combined SWI and neuromelanin had a similar discriminatory ability (AUC 0.830, 95% CI = 0.770-0.880). Similarly, the diagnosis of PD was excellent. CONCLUSIONS CS-SENSE may add value to the diagnostic capability of nigrosome-1 on SWI to reduce the nondiagnostic scan rates. Furthermore, loss of nigrosome-1 on SWI or volume loss of neuromelanin on NM-MRI may be helpful for diagnosing PD.
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Affiliation(s)
- D H Lee
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea; Department of Radiology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - H Heo
- Department of Convergence Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - C H Suh
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.
| | - W H Shim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - E Kim
- Philips Healthcare Korea, Seoul, Republic of Korea
| | - S Jo
- Department of Neurology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - S J Chung
- Department of Neurology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - C S Lee
- Department of Neurology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - H S Kim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - S J Kim
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
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Heo H, Kim Y, Cha B, Brito S, Kim H, Kim H, Fatombi BM, Jung SY, Lee SM, Lei L, Lee SH, Park GW, Kwak BM, Bin BH, Park JH, Lee MG. A systematic exploration of ginsenoside Rg5 reveals anti-inflammatory functions in airway mucosa cells. J Ginseng Res 2023; 47:97-105. [PMID: 36644392 PMCID: PMC9834007 DOI: 10.1016/j.jgr.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/20/2022] [Accepted: 06/20/2022] [Indexed: 01/18/2023] Open
Abstract
Background Hyperactivated airway mucosa cells overproduce mucin and cause severe breathing complications. Here, we aimed to identify the effects of saponins derived from Panax ginseng on inflammation and mucin overproduction. Methods NCI-H292 cells were pre-incubated with 16 saponins derived from P. ginseng, and mucin overproduction was induced by treatment with phorbol 12-myristate 13-acetate (PMA). Mucin protein MUC5AC was quantified by enzyme-linked immunosorbent assay, and mRNA levels were analyzed using quantitative polymerase chain reaction (qPCR). Moreover, we performed a transcriptome analysis of PMA-treated NCI-H292 cells in the absence or presence of Rg5, and differential gene expression was confirmed using qPCR. Phosphorylation levels of signaling molecules, and the abundance of lipid droplets, were measured by western blotting, flow cytometry, and confocal microscopy. Results Ginsenoside Rg5 effectively reduced MUC5AC secretion and decreased MUC5AC mRNA levels. A systematic functional network analysis revealed that Rg5 upregulated cholesterol and glycerolipid metabolism, resulting in the production of lipid droplets to clear reactive oxygen species (ROS), and modulated the mitogen-activated protein kinase and nuclear factor (NF)-κB signaling pathways to regulate inflammatory responses. Rg5 induced the accumulation of lipid droplets and decreased cellular ROS levels, and N-acetyl-l-cysteine, a ROS inhibitor, reduced MUC5AC secretion via Rg5. Furthermore, Rg5 hampered the phosphorylation of extracellular signal-regulated kinase and p38 proteins, affecting the NF-κB signaling pathway and pro-inflammatory responses. Conclusion Rg5 alleviated inflammatory responses by reducing mucin secretion and promoting lipid droplet-mediated ROS clearance. Therefore, Rg5 may have potential as a therapeutic agent to alleviate respiratory disorders caused by hyperactivation of mucosa cells.
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Affiliation(s)
- Hyojin Heo
- Department of Applied Biotechnology, Ajou University, Suwon, Republic of Korea
| | - Yumin Kim
- Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea,Department of Biomedical Science and Engineering, Gwangju Institute of Science & Technology, Republic of Korea
| | - Byungsun Cha
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Sofia Brito
- Department of Applied Biotechnology, Ajou University, Suwon, Republic of Korea
| | - Haneul Kim
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Hyunjin Kim
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | | | - So Young Jung
- Department of Applied Biotechnology, Ajou University, Suwon, Republic of Korea
| | - So Min Lee
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Lei Lei
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Sang Hun Lee
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Geon-woo Park
- Department of Applied Biotechnology, Ajou University, Suwon, Republic of Korea,Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea
| | - Byeong-Mun Kwak
- Department of Meridian and Acupoint, College of Korean Medicine, Semyung University, Chungbuk, Republic of Korea,Corresponding author. Department of Meridian and Acupoint, College of Korean Medicine, Semyung University, Chungbuk, 27136, Republic of Korea.
| | - Bum-Ho Bin
- Department of Applied Biotechnology, Ajou University, Suwon, Republic of Korea,Department of Biological Sciences, Ajou University, Suwon, Republic of Korea,Corresponding author. Department of Biological Sciences, Ajou University, Suwon, 16499, Republic of Korea.
| | - Ji-Hwan Park
- Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea,Corresponding author. Korea Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology, Republic of Korea.
| | - Mi-Gi Lee
- Bio-Center, Gyeonggi-do Business and Science Accelerator, Suwon, Republic of Korea,Corresponding author. Bio-Center, Gyeonggi-do Business and Science Accelerator, Suwon, 16229, Republic of Korea.
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Lee SJ, Kim D, Suh CH, Shim WH, Heo H, Jo S, Chung SJ, Kim HS, Kim SJ. Detection rate of MR myelography without intrathecal gadolinium in patients with newly diagnosed spontaneous intracranial hypotension. Clin Radiol 2022; 77:848-854. [PMID: 35985843 DOI: 10.1016/j.crad.2022.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 06/16/2022] [Accepted: 06/28/2022] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the detection rate of magnetic resonance (MR) myelography without intrathecal gadolinium for cerebrospinal fluid (CSF) leakage in patients with newly diagnosed spontaneous intracranial hypotension (SIH) and to validate a published scoring system for predicting CSF leakage. MATERIALS AND METHODS This retrospective, observational, single-institution study included patients with newly diagnosed SIH between March 2015 and April 2021. Patients were included if they (a) had newly diagnosed SIH and (b) underwent initial brain MR imaging and preprocedural MR myelography with two- and three-dimensional turbo spin-echo sequences. Patients who underwent spine surgery or procedures including epidural injection and acupuncture were excluded. The detection rate was defined as the proportion of patients with a true-positive MR myelography result among all patients with confirmed CSF leakage. The interobserver agreement for the MR myelography results between two radiologists was analysed using weighted kappa statistics. RESULTS A total of 136 patients (mean age, 48 years; 70 women) with suspected SIH were included. Of these patients, 120 (88%, 120/136) were confirmed to have CSF leakage. Of the patients with confirmed CSF leakage, 90 (75%, 90/120) had epidural fluid collection. The detection rate of MR myelography for CSF leakage was 88% (105/120). The interobserver agreement between the two readers for detecting CSF leakage (κ = 0.76) or epidural fluid collection (κ = 0.76) on MR myelography was high. Among 24 patients with normal brain MR imaging results, 16 had CSF leakage (67%, 16/24). CONCLUSIONS Non-invasive MR myelography without intrathecal gadolinium should be considered to detect CSF leakage in patients with suspected SIH.
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Affiliation(s)
- S J Lee
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - D Kim
- University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - C H Suh
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - W H Shim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Heo
- Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S Jo
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S J Chung
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H S Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S J Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Brito S, Baek JM, Cha B, Heo H, Lee SH, Lei L, Jung SY, Lee SM, Lee SH, Kwak BM, Chae S, Lee MG, Bin BH. Nicotinamide mononucleotide reduces melanin production in aged melanocytes by inhibiting cAMP/Wnt signaling. J Dermatol Sci 2022; 106:159-169. [DOI: 10.1016/j.jdermsci.2022.05.002] [Citation(s) in RCA: 1] [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] [Received: 10/31/2021] [Revised: 04/01/2022] [Accepted: 05/05/2022] [Indexed: 01/07/2023]
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Heo H, Bae JH, Amano A, Park T, Choi YH. Supplemental or dietary intake of omega-3 fatty acids for the treatment of periodontitis: A meta-analysis. J Clin Periodontol 2022; 49:362-377. [PMID: 35141945 DOI: 10.1111/jcpe.13603] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the intervention effect of omega-3 fatty acids on changes in periodontal parameters. MATERIALS AND METHODS This meta-analysis included studies published in English language between 2010 and 2020, which were extracted from the Cochrane Library, EMBASE, and PubMed databases. The effects of omega-3 fatty acid intervention were investigated using the amount of omega-3 intake, periodontal pocket depth (PPD), clinical attachment loss (CAL), and bleeding on probing (BOP). The random-effects model was generated for data analysis. To obtain robustness of the model, sensitivity analysis was implemented. Subgroup analyses were performed based on the intervention period for each parameter. RESULTS All 13 studies included in the meta-analysis were interventional, randomized controlled trials. Two studies implemented omega-3 fatty acid-rich diets, while 11 studies used supplements. Risk of bias was low, and publication bias was not shown. Meta-analysis showed a statistically significant PPD reduction (standardized mean difference [SMD] = -0.81, absolute mean difference [MD] = -0.44 mm), CAL gain (SMD = -0.77, MD = -0.51 mm), and BOP reduction (SMD = -0.65, MD = -9.45%) for the omega-3 fatty acid intervention overall. CONCLUSION This study suggests that supplemental or dietary intake of omega-3 fatty acids for the treatment of periodontitis may have a positive impact on the disease.
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Affiliation(s)
- Hyojin Heo
- Department of Preventive Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Ji-Hyun Bae
- Department of Food Science and Nutrition, Keimyung University, Daegu, Republic of Korea
| | - Atsuo Amano
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Teajun Park
- Department of Preventive Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Youn-Hee Choi
- Department of Preventive Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.,Institute for Translational Research in Dentistry, Kyungpook National University, Daegu, Republic of Korea
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Jo H, Jang D, Park SK, Lee MG, Cha B, Park C, Shin YS, Park H, Baek JM, Heo H, Brito S, Hwan HG, Chae S, Yan SW, Lee C, Min CK, Bin BH. Ginsenoside 20(S)-protopanaxadiol induces cell death in human endometrial cancer cells via apoptosis. J Ginseng Res 2020; 45:126-133. [PMID: 33437164 PMCID: PMC7790893 DOI: 10.1016/j.jgr.2020.02.002] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 12/20/2019] [Accepted: 02/21/2020] [Indexed: 12/01/2022] Open
Abstract
Background 20(S)-protopanaxadiol (20(S)-PPD), one of the aglycone derivatives of major ginsenosides, has been shown to have an anticancer activity toward a variety of cancers. This study was initiated with an attempt to evaluate its anti-cancer activity toward human endometrial cancer by cell and xenograft mouse models. Methods Human endometrial cancer (HEC)-1A cells were incubated with different 20(S)-PPD concentrations. 20(S)-PPD cytotoxicity was evaluated using MTT assay. Apoptosis was detected using the annexin V binding assay and cell cycle analysis. Cleaved poly (ADP-ribose) polymerase (PARP) and activated caspase-9 were assessed using western blotting. HEC-1A cell tumor xenografts in athymic mice were generated by inoculating HEC-1A cells into the flank of BALB/c female mice and explored to validate 20(S)-PPD anti-endometrial cancer toxicity. Results 20(S)-PPD inhibited HEC-1A cell proliferation in a dose-dependent manner with an IC50 value of 3.5 μM at 24 h. HEC-1A cells morphologically changed after 20(S)-PPD treatment, bearing resemblance to Taxol-treated cells. Annexin V-positive cell percentages were 0%, 10.8%, and 58.1% in HEC-1A cells when treated with 0, 2.5, and 5 μM of 20(S)-PPD, respectively, for 24 h. 20(S)-PPD subcutaneously injected into the HEC-1A cell xenograft-bearing mice three times a week for 17 days manifested tumor growth inhibition by as much as 18% at a dose of 80 mg/kg, which sharply contrasted to controls that showed an approximately 2.4-fold tumor volume increase. These events paralleled caspase-9 activation and PARP cleavage. Conclusion 20(S)-PPD inhibits endometrial cancer cell proliferation by inducing cell death via a caspase-mediated apoptosis pathway. Therefore, the 20(S)-PPD-like ginsenosides are endowed with ample structural information that could be utilized to develop other ginsenoside-based anticancer agents.
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Affiliation(s)
- Hantae Jo
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Dongmin Jang
- Department of Biomedical Sciences, Graduate Program of Molecular Medicine, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Sun Kyu Park
- Department of Conservative Dentistry, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Mi-Gi Lee
- Gyeonggido Business and Science Accelerator, Suwon, Republic of Korea
| | - Byungsun Cha
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Chaewon Park
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Yong Sub Shin
- Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Hyein Park
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Jin-Myoung Baek
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Hyojin Heo
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Sofia Brito
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Hyun Gyu Hwan
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Sehyun Chae
- Korea Brain Bank, Korea Brain Research Institute, Daegu, Republic of Korea
| | - Shao-Wei Yan
- Department of Applied Biotechnology, Ajou University Graduate School, Suwon, Republic of Korea
| | - Changho Lee
- Department of Pharmacology and Biomedical Science, College of Medicine, Hanyang University, Seoul, Republic of Korea
| | - Churl K Min
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
| | - Bum-Ho Bin
- Department of Biological Sciences, Ajou University, Suwon, Republic of Korea
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Jin Y, Heo H, Walker E, Krokhin A, Choi TY, Neogi A. The effects of temperature and frequency dispersion on sound speed in bulk poly (vinyl alcohol) poly (N-isopropylacrylamide) hydrogels caused by the phase transition. Ultrasonics 2020; 104:105931. [PMID: 32156431 DOI: 10.1016/j.ultras.2019.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/26/2019] [Accepted: 05/10/2019] [Indexed: 06/10/2023]
Abstract
Bulk Poly (Vinyl Alcohol) (PVA) Poly (N-isopropyl acrylamide) (PNIPAm) hydrogel, one of the thermally responsive phase transitive hydrogels, is a versatile material due to its sharp volumetric phase transition and anomalous behaviors with facile tunability by thermal stimulation. At the lower critical solution temperature (LCST) of 33 °C, the hydrogels undergo a volumetric phase transition that causes drastic, non-monotonic change in the elastic modulus, viscosity, stiffness, and speed of sound. Here, we report the temperature and frequency dependence of the speed of sound in bulk PVA-PNIPAm hydrogel as measured by means of a planar resonant cavity. The linear response theory is applied for calculation of frequency dependent speed of sound. Comparisons find standard time of flight techniques underestimate the speed of sound by up to 6%, with variation in the frequency dependent speed of sound reaching as high as 200 m/s in the ultrasonic range of 0.2-0.8 MHz. The first characterization of frequency dependent speed of sound in PVA-PNIPAm hydrogel is addressed and delineated into its phase transition behaviors as connected to temperature. The findings can lead to better characterization of mechanical properties using ultrasonic spectroscopy, and higher resolution in ultrasonic imaging applications with dispersive media.
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Affiliation(s)
- Y Jin
- Department of Mechanical and Energy Engineering, University of North Texas, 3940 North Elm Suite F101, Denton, TX 76207, USA
| | - H Heo
- Department of Mechanical and Energy Engineering, University of North Texas, 3940 North Elm Suite F101, Denton, TX 76207, USA; Department of Physics, University of North Texas, P.O. Box 311427, Denton, TX 76203, USA
| | - E Walker
- Echonovus Inc., 1800 South Loop 288 STE 396 #234, Denton, TX 76205, USA
| | - A Krokhin
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, TX 76203, USA
| | - T Y Choi
- Department of Mechanical and Energy Engineering, University of North Texas, 3940 North Elm Suite F101, Denton, TX 76207, USA.
| | - A Neogi
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, TX 76203, USA; Advanced Materials and Manufacturing Processes Institute, University of North Texas, 3940 North Elm Street, Box Q, Discovery Park Annex, Denton, TX 76207, USA.
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Walker E, Neogi A, Bozhko A, Zubov Y, Arriaga J, Heo H, Ju J, Krokhin AA. Nonreciprocal Linear Transmission of Sound in a Viscous Environment with Broken P Symmetry. Phys Rev Lett 2018; 120:204501. [PMID: 29864343 DOI: 10.1103/physrevlett.120.204501] [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] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 06/08/2023]
Abstract
Reciprocity is a fundamental property of the wave equation in a linear medium that originates from time-reversal symmetry, or T symmetry. For electromagnetic waves, reciprocity can be violated by an external magnetic field. It is much harder to realize nonreciprocity for acoustic waves. Here we report the first experimental observation of linear nonreciprocal transmission of ultrasound through a water-submerged phononic crystal consisting of asymmetric rods. Viscosity of water is the factor that breaks the T symmetry. Asymmetry, or broken P symmetry along the direction of sound propagation, is the second necessary factor for nonreciprocity. Experimental results are in agreement with numerical simulations based on the Navier-Stokes equation. Our study demonstrates that a medium with broken PT symmetry is acoustically nonreciprocal. The proposed passive nonreciprocal device is cheap, robust, and does not require an energy source.
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Affiliation(s)
- E Walker
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, Texas 76203, USA
- Echonovus Inc., 1800 South Loop 288 STE 396 #234, Denton, Texas 76205, USA
| | - A Neogi
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, Texas 76203, USA
| | - A Bozhko
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, Texas 76203, USA
| | - Yu Zubov
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, Texas 76203, USA
| | - J Arriaga
- Instituto de Física, Universidad Autónoma de Puebla Apartado Postal J-48, 72570 Puebla, México
| | - H Heo
- Department of Mechanical & Energy Engineering, University of North Texas, 3940 North Elm Suite F101, Denton, Texas 76207, USA
| | - J Ju
- UM-SJTU Joint Institute, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - A A Krokhin
- Department of Physics, University of North Texas, P.O. Box 311427, Denton, Texas 76203, USA
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Min JS, Kim D, Park JB, Heo H, Bae SH, Seo JH, Oh E, Bae SK. Application of Physiologically Based Pharmacokinetic Modeling In Predicting Drug-Drug Interactions For Sarpogrelate Hydrochloride In Humans. Clin Ther 2016; 38:e32. [PMID: 27673665 DOI: 10.1016/j.clinthera.2016.07.167] [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: 10/21/2022]
Affiliation(s)
- J S Min
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - D Kim
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - J B Park
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - H Heo
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - S H Bae
- Department of Pharmacology, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul, South Korea
| | - J H Seo
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - E Oh
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
| | - S K Bae
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon, South Korea
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Kim D, Lee H, Kwon K, Park S, Heo H, Lee Y, Choi J, Shin C, Ryu J. Early immature neuronal death initiates cerebral ischemia-induced neurogenesis in the dentate gyrus. Neuroscience 2015; 284:42-54. [DOI: 10.1016/j.neuroscience.2014.09.074] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 09/16/2014] [Accepted: 09/16/2014] [Indexed: 02/03/2023]
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Park SH, Lee JS, Heo H, Suh YW, Kim SH, Lim KH, Moon NJ, Lee SJ, Park SH, Baek SH. A Nationwide Population-Based Study of Low Vision and Blindness in South Korea. Invest Ophthalmol Vis Sci 2014; 56:484-93. [DOI: 10.1167/iovs.14-14909] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heo H, Kim YJ, Koo BS, So MW, Seo WJ, Kim YG, Lee CK, Yoo B. SAT0097 Changes In Bone Mineral Density in Patients with Recent-Onset Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1823] [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: 11/04/2022]
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