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Lee TS, Kwon HM, Park JY, Park MC, Choi YS, Park KK. Evaluating pain management from peripheral nerve block for geriatric patients following bipolar hemiarthroplasty for displaced femoral-neck fracture. Gerontology 2024:000538614. [PMID: 38574472 DOI: 10.1159/000538614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 03/26/2024] [Indexed: 04/06/2024] Open
Abstract
INTRODUCTION The purpose of this study was to evaluate peripheral nerve block (PNB) effectiveness on postoperative pain management and surgical outcomes for displaced femoral-neck fracture in geriatric patients (>70 years) who underwent bipolar hemiarthroplasty (BHA). METHODS From January 2017 to December 2021, 231 geriatric patients with displaced femoral-neck fracture who consecutively underwent BHA were retrospectively reviewed. Patients were divided into two groups: patient-controlled analgesia (PCA) group (n=132) who received only intravenous (IV) PCA for postoperative pain management, and all others who received PNB with IV PCA (PNB+PCA) such as femoral nerve block or fascia iliaca compartment block after surgery (n=99). Primary outcomes were postoperative visual analog scale (VAS) at rest and during activity at 6, 24, and 48 hours postoperatively. Secondary outcomes were postoperative complications, changes in hemoglobin (Hb), length of hospital stay, and total morphine usage after surgery. RESULTS Postoperative resting VAS at 6 hours and 48 hours was significantly lower in the PNB+PCA group compared with the PCA group (p=0.075, p=0.0318, respectively). However, there was no significant difference in either resting VAS at 24 hours or active VAS. Complications of pneumonia and delirium until one month postoperative were significantly lower in the PNB + PCA group than the PCA group (p=0.0022, p=0.0055, respectively). CONCLUSION PNB with IV PCA seems to have a beneficial effect on geriatric femoral-neck patients who underwent BHA with postoperative analgesia for reducing postoperative resting pain and complications, especially pneumonia and delirium.
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Kim HM, Jin BR, Lee JS, Jo EH, Park MC, An HJ. Anti-atopic dermatitis effect of fish collagen on house dust mite-induced mice and HaCaT keratinocytes. Sci Rep 2023; 13:14888. [PMID: 37689763 PMCID: PMC10492863 DOI: 10.1038/s41598-023-41831-w] [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] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 08/31/2023] [Indexed: 09/11/2023] Open
Abstract
Collagen, a major structural protein in mammalian tissues, is effective against skin wounds and osteoarthritis. Although bovine and porcine collagens have mainly been used, several potential risks of mammalian collagen have led to the use of fish collagen (FC) as an alternative. FC and its peptides are used as common cosmeceutical products because of their antihypertensive, anti-bacterial, and antioxidant activities. Despite the effects of FC on wrinkle reduction, UV-protection, and wound healing, the relationship between FC and atopic dermatitis (AD) has not yet been reported. Therefore, we investigated the anti-AD effects of FC against house dust mite (Dermatophagoides farinae, HDM)-induced AD in NC/Nga mice and TNF-α/IFN-γ-stimulated HaCaT keratinocytes. FC alleviated AD apparent symptoms, such as dermatitis score, transepidermal water loss, epidermal thickness, and mast cell infiltration upon declining pro-inflammatory cytokines and mediators, IL-6, IL-5, IL-13, TSLP, and TNF-α. The skin barrier protein, filaggrin, was also recovered by FC administration in vivo and in vitro. Immune response and skin barrier dysfunction are both mitigated by three routes of FC administration: oral, topical, and both routes via the regulation of IκB, MAPKs, and STATs pathways. In summary, FC could be a potential therapeutic agent for AD by regulating immune balance and skin barrier function.
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Affiliation(s)
- Hye-Min Kim
- Department of Herbology, College of Korean Medicine, Sangji University, Wonju, Gangwon-do, 26339, Republic of Korea
- Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Bo-Ram Jin
- Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Jin-Sil Lee
- R&D Institute, Haewon Biotech, Inc., Bucheon, Gyeonggi-do, Republic of Korea
| | - Eun Heui Jo
- Department of Acupuncture and Moxibustion, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Deokjin-gu, Jeonju, Jeollabuk-do, Republic of Korea
| | - Min Cheol Park
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, 460 Iksan-daero, Iksan, Jeollabuk-do, 54538, Republic of Korea.
| | - Hyo-Jin An
- Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul, 02447, Republic of Korea.
- Department of Integrated Drug Development and Natural Products, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea.
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Dong L, Lee JH, Jo EH, Lee JS, Kim SH, Lee DS, Park MC. Effects of Varying Ratios of Glycyrrhiza uralensis and Donkey Hide Gelatin Water Extracts on Dinitrochlorobenzene-Induced Atopic Dermatitis in NC/Nga Mice. Nutrients 2023; 15:2094. [PMID: 37432237 DOI: 10.3390/nu15092094] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 07/12/2023] Open
Abstract
Atopic dermatitis is a chronic skin disease that affects millions of people all over the world. The objective of this study was to evaluate the inhibitory effects of the roots of Glycyrrhiza uralensis (GU) and Donkey Hide Gelatin (DHG) water extracts on DNCB-induced NC/Nga mice and TNF-α/IFN-γ treated keratinocytes or LPS-stimulated macrophages. The combined treatment using the water extracts of GU and DHG improved the skin symptom evaluation score and skin histology, with increased expression of the skin barrier proteins Claudin 1 and Sirt 1 in lesion areas. The IFN-γ activity was promoted in PBMCs, ALN, and dorsal skin tissue, while the absolute cell number was reduced for T cells so that the production and expression of serum IgE and cytokines were suppressed. In TNF-α/IFN-γ induced HaCaT cells, IL-6, IL-8, MDC, and RANTES were all inhibited by GU and DHG water extracts, while ICAM-1 and COX-2 levels were similarly downregulated. In addition, GU and DHG water extracts decreased LPS-mediated nitric oxide, IL-6, TNF-α, and PGE2 in RAW 264.7 cells, and the expression of iNOS and COX-2 also decreased. Notably, the DHG:GU ratio of 4:1 was shown to have the best effects of all ratios. In conclusion, GU and DHG have anti-skin inflammatory potentials that can be used as alternative ingredients in the formula of functional foods for people with atopic dermatitis.
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Affiliation(s)
- Linsha Dong
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Republic of Korea
| | - Ju Hyun Lee
- Department of Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan 54538, Republic of Korea
| | - Eun Heui Jo
- Department of Acupuncture and Moxibustion, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan 54538, Republic of Korea
| | - Jin-Sil Lee
- Director of R & D Institute, Haewon Biotech Inc., Yongin 59143, Republic of Korea
| | - Seung-Hyung Kim
- Institute of Traditional Medicine and Bioscience Daejeon University, Daejeon 34520, Republic of Korea
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Republic of Korea
| | - Min Cheol Park
- Department of Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan 54538, Republic of Korea
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Park MC, Kim H, Kang J, Kim S, Heo Y. Plasma levels of exosome‐bound Aβs accurately identify Alzheimer’s disease patients. Alzheimers Dement 2022. [DOI: 10.1002/alz.061652] [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: 12/24/2022]
Affiliation(s)
| | - Hye‐Ri Kim
- Absology Co, Anyang‐si Republic of South Korea
| | - JiYoon Kang
- Korea Institute of Science and Technology Seoul Republic of South Korea
| | - SangYun Kim
- Clinical Neuroscience Center, Seoul National University Bundang Hospital Seoungnam Republic of South Korea
| | - Youhee Heo
- Korea Institute of Science and Technology Seoul Republic of South Korea
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Lee JH, Dong L, Noh HM, Park SG, Kim SH, Jo EH, Lee DS, Park MC. Inhibitory Effects of Donkey Hide Gelatin on DNCB-Induced Atopic Dermatitis in NC/Nga Mice. Front Pharmacol 2022; 13:896450. [PMID: 35694270 PMCID: PMC9178178 DOI: 10.3389/fphar.2022.896450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/03/2022] [Indexed: 11/30/2022] Open
Abstract
The increase of atopic dermatitis has led to higher socio-economic cost and raised a need for alternative medicine as novel therapeutic agents. In this study, we aimed to evaluate the inhibitory effects of Donkey Hide Gelatin (DHG) water extract on DNCB-induced atopic dermatitis in NC/Nga mice and on tumor necrosis factor (TNF)-α/interferon (IFN)-γ-treated keratinocytes and to investigate its underlying molecular mechanisms. NC/Nga mice were induced by DNCB, administered Dexamethasone (3 mg/kg) or DHG water extracts (100–400 mg/kg) for 3 weeks. The skin symptom score, serum IgE and immune cells were measured, the ALN, spleen and dorsal skin tissue were extracted for FACS, quantitative real-time PCR and histology analysis. In vitro, HaCaT cells were induced by TNF-α/IFN-γ, the levels of pro-inflammatory cytokines and chemokines and its underlying mechanism were measured by ELISA and Western blot. As a result, DHG groups showed a significant decrease in the skin symptom score and the immune cell absolute number. It also showed a marked reduction of allergic and the levels of neutrophils and eosinophils in histology analysis. In TNF-α/IFN-γ induced HaCaT cells, DHG showed inhibition effects on IL-6, IL-8, TARC and RANTES, it also downregulated the expression of ICAM-1 and COX-2, up-regulated the expression of Filaggrin. Furthermore, DHG suppressed the activation of NF-κB and mitogen-activated protein kinases (MAPK) signaling pathway induced by TNF-α/IFN-γ. Taken together, DHG maybe a potential therapeutic agent or supplement for skin inflammatory disease such as atopic dermatitis.
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Affiliation(s)
- Ju Hyun Lee
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital, Iksan, South Korea
| | - Linsha Dong
- College of Pharmacy, Chosun University, Gwangjuu, South Korea
| | - Hyeon Min Noh
- Weedahm Korean Medicine Hospital, Gangnam, South Korea
| | - Sung-Gu Park
- ResamKorean Medicine Hospital, Gangnam, South Korea
| | - Seung-Hyung Kim
- Institute of Traditional Medicine and Bioscience, Daejeon University, Daejeon, South Korea
| | - Eun Heui Jo
- Department of Acupuncture and Moxibustion, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, South Korea
- *Correspondence: Eun Heui Jo, ; Dong-Sung Lee, ; Min Cheol Park,
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Gwangjuu, South Korea
- *Correspondence: Eun Heui Jo, ; Dong-Sung Lee, ; Min Cheol Park,
| | - Min Cheol Park
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, Korea
- *Correspondence: Eun Heui Jo, ; Dong-Sung Lee, ; Min Cheol Park,
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Hwang M, Uhm JS, Park MC, Shim EB, Lee CJ, Oh J, Yu HT, Kim TH, Joung B, Pak HN, Kang SM, Lee MH. In silico screening method for non-responders to cardiac resynchronization therapy in patients with heart failure: a pilot study. Int J Arrhythm 2022. [DOI: 10.1186/s42444-021-00052-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Cardiac resynchronization therapy (CRT) is an effective treatment option for patients with heart failure (HF) and left ventricular (LV) dyssynchrony. However, the problem of some patients not responding to CRT remains unresolved. This study aimed to propose a novel in silico method for CRT simulation.
Methods
Three-dimensional heart geometry was constructed from computed tomography images. The finite element method was used to elucidate the electric wave propagation in the heart. The electric excitation and mechanical contraction were coupled with vascular hemodynamics by the lumped parameter model. The model parameters for three-dimensional (3D) heart and vascular mechanics were estimated by matching computed variables with measured physiological parameters. CRT effects were simulated in a patient with HF and left bundle branch block (LBBB). LV end-diastolic (LVEDV) and end-systolic volumes (LVESV), LV ejection fraction (LVEF), and CRT responsiveness measured from the in silico simulation model were compared with those from clinical observation. A CRT responder was defined as absolute increase in LVEF ≥ 5% or relative increase in LVEF ≥ 15%.
Results
A 68-year-old female with nonischemic HF and LBBB was retrospectively included. The in silico CRT simulation modeling revealed that changes in LVEDV, LVESV, and LVEF by CRT were from 174 to 173 mL, 116 to 104 mL, and 33 to 40%, respectively. Absolute and relative ΔLVEF were 7% and 18%, respectively, signifying a CRT responder. In clinical observation, echocardiography showed that changes in LVEDV, LVESV, and LVEF by CRT were from 162 to 119 mL, 114 to 69 mL, and 29 to 42%, respectively. Absolute and relative ΔLVESV were 13% and 31%, respectively, also signifying a CRT responder. CRT responsiveness from the in silico CRT simulation model was concordant with that in the clinical observation.
Conclusion
This in silico CRT simulation method is a feasible technique to screen for CRT non-responders in patients with HF and LBBB.
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Lee JH, Jo EH, Jung JY, Kang SJ, Yang GJ, Shim YH, Park MC. Efficacy and safety of Soshiho-tang in atopic dermatitis patients with gastrointestinal disorders: A double-blinded, randomized, and placebo-controlled clinical trial. J Ethnopharmacol 2021; 274:114006. [PMID: 33766759 DOI: 10.1016/j.jep.2021.114006] [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: 04/26/2020] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Because of the growing incidence of AD, psychosocial and economic burden of AD patients are often considerable. Steroid treatments are widely used, but long term use of this treatment can cause side effects. To reduce the burden of AD patients and find new efficient treatment, this study chose Soshiho-tang, a traditional medicine used in eastern Asia. AIM OF THE STUDY Soshiho-tang (SSHT) is a traditional herbal medicine that has anti-inflammatory effects and improves immune function. This clinical trial evaluated the efficacy and safety of SSHT in atopic dermatitis (AD) patients with gastrointestinal disorders in comparison with placebo. MATERIALS AND METHODS This study was a single-center, randomized, double-blinded, placebo-controlled, and investigator-initiated clinical trial. A total of 60 patients aged 3-18 years with gastrointestinal disorders and diagnosed with AD by Hanifin & Rajka criteria with a Scoring Atopic Dermatitis (SCORAD) index between 15 and 49 were enrolled. Participants were randomly assigned to the SSHT or placebo groups in a ratio of 1:1 and efficacy evaluation was conducted at week 4 and 8. The participants orally administered SSHT or placebo three times a day for 4 weeks. The primary outcome was measured based on a change of SCORAD index. The secondary outcome measurements included the following: survey questionnaires of gastrointestinal disorder, amount and frequency of ointment application for AD, dermatology quality of life index, and safety evaluation (diagnostic test, adverse reaction, and vital sign monitoring). RESULTS During efficacy evaluation, the SCORAD score and digestive symptoms in the experimental and placebo groups were not statistically significant. However, the amount and frequency of ointment application in the experimental group were reduced compared to those in the placebo group at week 8. Also, In the Children's Dermatology Life Quality Index (CDLQI), statistically significant Quality of Life (QOL) improvement was observed in the SSHT experimental group compared to the placebo group. In safety evaluation, all participants were within the normal range during the study period. Blood sample testing indicated that the lymphocytes ratio decreased, and neutrophils ratio increased in the experimental group, whereas the placebo group showed the opposite immune response pattern. CONCLUSION We concluded that SSHT administration can reduce steroid ointment dependence and improve the QOL in AD patients by regulating neutrophil-lymphocyte ratio.
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Affiliation(s)
- Ju Hyun Lee
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital, Iksan, Jeollabuk-do, Republic of Korea.
| | - Eun Heui Jo
- Department of Acupuncture and Moxibustion, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Deokjingu, Jeonju, Jeollabuk-do, Republic of Korea.
| | - Jee Youn Jung
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea.
| | - Su Jin Kang
- Department of Korean Medicine Obstetrics & Gynecology, Wonkwang University Korean Medicine Hospital, Iksan, Jeollabuk-do, Republic of Korea.
| | - Geum Jin Yang
- Korean Medicine Dermatology Clinical Research Center of Wonkwang University, Iksan, Jeollabuk-do, Republic of Korea.
| | - Yu Hwa Shim
- Korean Medicine Dermatology Clinical Research Center of Wonkwang University, Iksan, Jeollabuk-do, Republic of Korea.
| | - Min Cheol Park
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, Jeollabuk-do, Republic of Korea.
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Lee JH, Jo EH, Jung JY, Kim YE, Son MJ, Kang SJ, Yang GJ, Shim YH, Park MC. Efficacy and Safety of Socheongryong-Tang Among Atopic Dermatitis Patients With Respiratory Disorders: A Double-Blinded, Randomized, Placebo-Controlled Clinical Trial. Front Pharmacol 2020; 11:597885. [PMID: 33324225 PMCID: PMC7726431 DOI: 10.3389/fphar.2020.597885] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 11/05/2020] [Indexed: 11/13/2022] Open
Abstract
Atopic dermatitis is a chronic inflammatory skin disease that affects the growth and development of children. The prevalence of atopic dermatitis has been continually increasing, and this has also been accompanied by rising socioeconomic costs. Interest has been growing in alternative medicine as a means of alleviating the burden of atopic dermatitis. This was a single-center, double-blinded, randomized, placebo-controlled investigator-led clinical trial including 60 atopic dermatitis patients. The participants were classified into an experimental group (30 persons) and a control group (30 persons), who were administered, respectively, socheongryong-tang or a placebo for 4 weeks. After 4 weeks of treatment, the participants visited the trial center again and assess their efficacy and safety. The researchers performed statistical comparisons of the changes in the SCORAD Index, amount and frequency of ointment use, and height and weight to assess the efficacy. To assess the safety, diagnostic tests and vital sign checks were performed at each visit, and the presence or absence of adverse events was observed. As a result, the frequency and the amount of steroid ointment application in both groups increased, but the experimental group showed less tendency (p = 0.081). Results of analyzing the children in the experimental group in relation to growth showed a significantly greater height growth than the control group (p < 0.05). In addition, all study participants did not show any remarkable abnormal signs in the safety evaluation. In conclusion, compared to the control group, the experimental group, who took socheongryong-tang showed a tendency to be less dependent on steroid ointment and statistically significant increase in height.
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Affiliation(s)
- Ju Hyun Lee
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital, Iksan, South Korea
| | - Eun Heui Jo
- Department of Acupuncture and Moxibustion, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Deokjingu, South Korea
| | - Jee Youn Jung
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon, South Korea
| | - Young-Eun Kim
- Future Medicine Division, Korea Institute of Oriental Medicine, Daejeon, South Korea
| | - Mi-Ju Son
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon, South Korea
| | - Su Jin Kang
- Department of Korean Medicine Obstetrics and Gynecology, Wonkwang University Korean Medicine Hospital, Iksan, South Korea
| | - Geum Jin Yang
- Korean Medicine Dermatology Clinical Research Center of Wonkwang University, Iksan, South Korea
| | - Yu Hwa Shim
- Korean Medicine Dermatology Clinical Research Center of Wonkwang University, Iksan, South Korea
| | - Min Cheol Park
- Department of Korean Medicine Ophthalmology and Otolaryngology and Dermatology, Wonkwang University Korean Medicine Hospital and Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, South Korea
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Lee JH, Lim JY, Jo EH, Noh HM, Park S, Park MC, Kim DK. Chijabyukpi-Tang Inhibits Pro-Inflammatory Cytokines and Chemokines via the Nrf2/HO-1 Signaling Pathway in TNF-α/IFN-γ-Stimulated HaCaT Cells and Ameliorates 2,4-Dinitrochlorobenzene-Induced Atopic Dermatitis-Like Skin Lesions in Mice. Front Pharmacol 2020; 11:1018. [PMID: 32733250 PMCID: PMC7358535 DOI: 10.3389/fphar.2020.01018] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 12/04/2019] [Accepted: 06/23/2020] [Indexed: 12/23/2022] Open
Abstract
Chijabyukpi-tang (CBT) is an oriental herbal formula consisting of three herbs (Gardeniae Fructus (Gardenia jasminoides J.Ellis.), Phellodendri Cortex (Phellodendron amurense Rupr.), Glycyrrhizae Radix (Glycyrrhiza uralensis Fisch. ex DC.) at the ratio of 2: 2: 1. CBT has traditionally been used to treat eczema with inflammation in Northeast Asia. The components of CBT have been shown to have anti-inflammatory and anti-oxidant properties, but the exact role and mechanism of CBT on atopic dermatitis (AD) remain unclear. In this study, we investigated the anti-inflammatory effect and mechanism of CBT in the HaCaT human keratinocyte cell line and investigated the anti-atopic effect in mice models of atopic dermatitis-like skin lesions. In the tumor necrosis factor alpha (TNF)-α/interferon (IFN)-γ-stimulated HaCaT cells, CBT inhibited the production of pro-inflammatory cytokines and chemokines and elevated the nuclear translocation of NF-E2 p45 related factors 2 (Nrf2) and subsequent production of heme oxygenase-1 (HO-1). CBT improved the symptoms of atopic dermatitis-like lesions in 2,4-dinitrochlorobenzene (DNCB)-treated mice by suppressing the levels of serum immunoglobulin E (IgE), and various pro-inflammatory cytokines and chemokines. The improvement effect of CBT on atopic dermatitis-like lesions can be predicted to be due to increased Nrf2 and HO-1 gene expression. These results suggest that CBT is an herbal medicine with the potential for use as a therapeutic agent for inflammatory skin diseases such as atopic dermatitis.
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Affiliation(s)
- Ji-Hyun Lee
- Department of Immunology and Institute of Medical Sciences, Medical School, Chonbuk National University, Jeonju, South Korea
| | - Ji-Ye Lim
- Department of Immunology and Institute of Medical Sciences, Medical School, Chonbuk National University, Jeonju, South Korea
| | - Eun Hee Jo
- Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, South Korea.,Department of Acupuncture and Moxibustion, College of Korean Medicine, Wonkwang University, Iksan, South Korea
| | - Hyeon Min Noh
- Korean Traditional Medicine Institute, Wonkwang University, Iksan, South Korea
| | - Sunggu Park
- Department of Korean Medical Ophthalmology & Otolaryngology & Dermatology, College of Korean Medicine, Wonkwang University, Iksan, South Korea
| | - Min Cheol Park
- Research Center of Traditional Korean Medicine, Wonkwang University, Iksan, South Korea.,Department of Korean Medical Ophthalmology & Otolaryngology & Dermatology, College of Korean Medicine, Wonkwang University, Iksan, South Korea
| | - Dae-Ki Kim
- Department of Immunology and Institute of Medical Sciences, Medical School, Chonbuk National University, Jeonju, South Korea
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Kim A, Lee SK, Parupudi T, Rahimi R, Song SH, Park MC, Islam S, Zhou J, Majumdar AK, Park JS, Yoo JM, Ziaie B. An Ultrasonically Powered Implantable Microprobe for Electrolytic Ablation. Sci Rep 2020; 10:1510. [PMID: 32001732 PMCID: PMC6992771 DOI: 10.1038/s41598-020-58090-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 03/06/2019] [Accepted: 01/10/2020] [Indexed: 11/09/2022] Open
Abstract
Electrolytic ablation (EA) is a promising nonthermal tumor ablation technique that destroys malignant cells through induction of a locoregional pH change. EA is typically performed by inserting needle electrodes inside the tumor followed by application of direct current (DC), thus inducing electrolysis and creating localized pH changes around the electrodes. In this paper, we report an ultrasonically powered implantable EA microprobe that may increase the clinical relevance of EA by allowing wireless control over device operation (capability to remotely turn the device on and off) and providing flexibility in treatment options (easier to administer fractionated doses over a longer period). The wireless EA microprobe consists of a millimeter-sized piezoelectric ultrasonic receiver, a rectifier circuit, and a pair of platinum electrodes (overall size is 9 × 3 × 2 mm3). Once implanted through a minimally invasive procedure, the microprobe can stay within a solid tumor and be repeatedly used as needed. Ultrasonic power allows for efficient power delivery to mm-scale devices implanted deep within soft tissues of the body. The microprobe is capable of producing a direct current of 90 µA at a voltage of 5 V across the electrodes under low-intensity ultrasound (~200 mW/cm2). The DC power creates acidic (pH < 2) and alkaline (pH > 12.9) regions around the anode and the cathode, respectively. The pH change, measured using tissue-mimicking agarose gel, extends to 0.8 cm3 in volume within an hour at an expansion rate of 0.5 mm3/min. The microprobe-mediated EA ablative capability is demonstrated in vitro in cancer cells and ex vivo in mouse liver.
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Affiliation(s)
- A Kim
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, 19122, USA.
| | - S K Lee
- Jubilee Biotechnology LLC, Philadelphia, PA, 19122, USA
| | - T Parupudi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA.,Birck Nanotechnology Center, West Lafayette, IN, 47907, USA
| | - R Rahimi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA.,Birck Nanotechnology Center, West Lafayette, IN, 47907, USA
| | - S H Song
- Department of Electronic Engineering, Sookmyung Women's University, Seoul, South Korea
| | - M C Park
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, 19122, USA
| | - S Islam
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, 19122, USA
| | - J Zhou
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA.,Birck Nanotechnology Center, West Lafayette, IN, 47907, USA
| | - A K Majumdar
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA, 19122, USA
| | - J S Park
- Pancreatobiliary Cancer Clinic, Department of Surgery, College of Medicine, Gangnam Severance Hospital, Yonsei University, Seoul, South Korea
| | - J M Yoo
- Department of Microbiology, School of Medicine, CHA University, Seongnam, South Korea
| | - B Ziaie
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA. .,Birck Nanotechnology Center, West Lafayette, IN, 47907, USA.
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11
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Hwang M, Han S, Park MC, Leem CH, Shim EB, Yim DS. Three-Dimensional Heart Model-Based Screening of Proarrhythmic Potential by in silico Simulation of Action Potential and Electrocardiograms. Front Physiol 2019; 10:1139. [PMID: 31551815 PMCID: PMC6738014 DOI: 10.3389/fphys.2019.01139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 04/16/2019] [Accepted: 08/20/2019] [Indexed: 12/19/2022] Open
Abstract
The proarrhythmic risk is a major concern in drug development. The Comprehensive in vitro Proarrhythmia Assay (CiPA) initiative has proposed the JTpeak interval on electrocardiograms (ECGs) and qNet, an in silico metric, as new biomarkers that may overcome the limitations of the hERG assay and QT interval. In this study, we simulated body-surface ECGs from patch-clamp data using realistic models of the ventricles and torso to explore their suitability as new in silico biomarkers for cardiac safety. We tested seven drugs in this study: dofetilide (high proarrhythmic risk), ranolazine, verapamil (QT increasing, but safe), bepridil, cisapride, mexiletine, and diltiazem. Human ventricular geometry was reconstructed from computed tomography (CT) images, and a Purkinje fiber network was mapped onto the endocardial surface. The electrical wave propagation in the ventricles was obtained by solving a reaction-diffusion equation using finite-element methods. The body-surface ECG data were calculated using a torso model that included the ventricles. The effects of the drugs were incorporated in the model by partly blocking the appropriate ion channels. The effects of the drugs on single-cell action potential (AP) were examined first, and three-dimensional (3D) body-surface ECG simulations were performed at free Cmax values of 1×, 5×, and 10×. In the single-cell and ECG simulations at 5× Cmax, dofetilide, but not verapamil or ranolazine, caused arrhythmia. However, the non-increasing JTpeak caused by verapamil and ranolazine that has been observed in humans was not reproduced in our simulation. Our results demonstrate the potential of 3D body-surface ECG simulation as a biomarker for evaluation of the proarrhythmic risk of candidate drugs.
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Affiliation(s)
| | - Seunghoon Han
- Department of Clinical Pharmacology and Therapeutics, Seoul St. Mary's Hospital, Seoul, South Korea.,Pharmacometrics Institute for Practical Education and Training (PIPET), College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Min Cheol Park
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, South Korea
| | - Chae Hun Leem
- Department of Physiology, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, South Korea
| | - Eun Bo Shim
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, South Korea
| | - Dong-Seok Yim
- Department of Clinical Pharmacology and Therapeutics, Seoul St. Mary's Hospital, Seoul, South Korea.,Pharmacometrics Institute for Practical Education and Training (PIPET), College of Medicine, The Catholic University of Korea, Seoul, South Korea
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12
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Han AL, Kim HR, Choi KH, Hwang KE, Zhu M, Huang Y, Wu M, Lee YJ, Park MC, Cho JH, Park DS. Comparison of cobas EGFR Mutation Test v2 and PANAMutyper-R- EGFR for Detection and Semi-Quantification of Epidermal Growth Factor Receptor Mutations in Plasma and Pleural Effusion Supernatant. Ann Lab Med 2019; 39:478-487. [PMID: 31037867 PMCID: PMC6502955 DOI: 10.3343/alm.2019.39.5.478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 08/09/2018] [Revised: 11/05/2018] [Accepted: 04/17/2019] [Indexed: 11/19/2022] Open
Abstract
Background Plasma epidermal growth factor receptor (EGFR) mutation tests are less invasive than tissue EGFR mutation tests. We determined which of two kits is more efficient: cobas EGFR Mutation test v2 (cobasv2; Roche Molecular Systems, Pleasanton, CA, USA) or PANAMutyper-R-EGFR (Mutyper; Panagene, Daejeon, Korea). We also evaluated whether pleural effusion supernatant (PE-SUP) samples are assayable, similar to plasma samples, using these two kits. Methods We analyzed 156 plasma and PE-SUP samples (31 paired samples) from 116 individuals. We compared the kits in terms of accuracy, assessed genotype concordance (weighted κ with 95% confidence intervals), and calculated Spearman's rho between semi-quantitatively measured EGFR-mutant levels (SQIs) measured by each kit. We also compared sensitivity using 47 EGFR-mutant harboring samples divided into more-dilute and less-dilute samples (dilution ratio: ≥ or <1:1,000). Results cobasv2 tended to have higher accuracy than Mutyper (73% vs 69%, P=0.53), and PE-SUP samples had significantly higher accuracy than plasma samples (97% vs 55–71%) for both kits. Genotype concordance was 98% (κ=0.92, 0.88–0.96). SQIs showed strong positive correlations (P<0.0001). In less-dilute samples, accuracy and sensitivity did not differ significantly between kits. In more-dilute samples, cobasv2 tended to have higher sensitivity than Mutyper (43% vs 20%, P=0.07). Conclusions The kits have similar performance in terms of EGFR mutation detection and semi-quantification in plasma and PE-SUP samples. cobasv2 tends to outperform Mutyper in detecting less-abundant EGFR-mutants. PE-SUP samples are assayable using either kit.
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Affiliation(s)
- A Lum Han
- Department of Family Medicine, School of Medicine, Wonkwang University, Iksan, Korea
| | - Hak Ryul Kim
- Department of Internal Medicine, School of Medicine, Wonkwang University, Iksan, Korea
| | - Keum Ha Choi
- Department of Pathology, School of Medicine, Wonkwang University, Iksan, Korea
| | - Ki Eun Hwang
- Department of Internal Medicine, School of Medicine, Wonkwang University, Iksan, Korea
| | - Mengyu Zhu
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea
| | - Yuya Huang
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea
| | - Moxin Wu
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea
| | - Young Jin Lee
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea
| | - Min Cheol Park
- Department of Oriental Medical Ophthalmology & Otolaryngology & Dermatology, College of Oriental Medicine, Wonkwang University, Iksan, Korea
| | - Ji Hyun Cho
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea
| | - Do Sim Park
- Department of Laboratory Medicine and Institute of Wonkwang Medical Science, School of Medicine, Wonkwang University, Iksan, Korea.,Wonkwang Institute of Clinical Medicine, Wonkwang University Hospital, Iksan, Korea.
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13
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Park MC, Heo Y, Park YH, Kim S, Kang JY. P4‐069: BLOOD‐BASED DIAGNOSIS OF ALZHEIMER'S DISEASE USING PHOTOOXIDATION‐INDUCED FLUORESCENCE AMPLIFICATION (PIFA) OF AMYLOID β FROM NEURONAL EXOSOMES. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.2472] [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: 10/28/2022]
Affiliation(s)
| | - Youhee Heo
- Seogang UniversitySeoulRepublic of South Korea
- Korea Institute of Science and TechnologySeoulRepublic of South Korea
| | - Young Ho Park
- Seoul National University Bundang HospitalSeoungnamRepublic of South Korea
| | - SangYun Kim
- Seoul National University Bundang HospitalSeongnamRepublic of South Korea
| | - Ji Yoon Kang
- Korea Institute of Science and TechnologySeoulRepublic of South Korea
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14
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Lee J, Lee JH, Kim GS, Park MC, Woo N, Cho JH. Ischemic Sciatic Neuropathy in a Patient with Liposarcoma. J Neurocrit Care 2017. [DOI: 10.18700/jnc.160100] [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: 12/01/2022] Open
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15
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Park MC, Baik MS, Lee JH, Cho JH, Lee J, Kim GS. Status Epilepticus after Catheter Drainage of Basal Ganglia Hemorrhage. J Neurocrit Care 2017. [DOI: 10.18700/jnc.160092] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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16
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Kim J, Wang Y, Park H, Park MC, Moon SE, Hong SM, Koo CM, Suh KY, Yang S, Cho H. Nonlinear Frameworks for Reversible and Pluripotent Wetting on Topographic Surfaces. Adv Mater 2017; 29:1605078. [PMID: 27935128 DOI: 10.1002/adma.201605078] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 10/28/2016] [Indexed: 06/06/2023]
Abstract
Soft, ultrathin frameworks nonlinearly organized in tandem are presented to realize both reversible and pluripotent wetting on topographic surfaces. A design rule is introduced by establishing and proving the theoretical model upon hierarchical textures. Nonlinear frameworks can be conformally and reversibly wet upon complex topography in nature, thereby overcoming the wetting problems in previous conventional solid systems.
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Affiliation(s)
- Junsoo Kim
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-744, Republic of Korea
- 3D New Devices Research Section, Electronics and Telecommunications Research Institute, Daejeon, 305-700, Republic of Korea
| | - Yifan Wang
- Department of Physics, University of Chicago, 5720 South Ellis Avenue, Chicago, IL, 60637, USA
| | - Hyunchul Park
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-744, Republic of Korea
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Min Cheol Park
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-744, Republic of Korea
| | - Seung Eon Moon
- 3D New Devices Research Section, Electronics and Telecommunications Research Institute, Daejeon, 305-700, Republic of Korea
| | - Soon Man Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Chong Min Koo
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Kahp-Yang Suh
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-744, Republic of Korea
| | - Shu Yang
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 191014, USA
| | - Hyesung Cho
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-744, Republic of Korea
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 191014, USA
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17
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Park MC, Sukumar P, Kim SK, Kang JY, Manz A, Kim TS. Selective and vertical microfabrication of lipid tubule arrays on glass substrates using template-guided gentle hydration. Lab Chip 2016; 16:4732-4741. [PMID: 27813541 DOI: 10.1039/c6lc01095d] [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] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Generally, asymmetric tubular lipid structures have been formed under the specific condition of gentle hydration or by using hydrodynamic and/or electrical elongation of vesicular lipid structures. Small-size lipid tubes are, however, very difficult to allocate or align in the vertical direction on the specific site of the substrate and, therefore, the ability to produce them selectively and in large quantities as an array form is limited. Herein, we propose an easy and novel method to fabricate selective and vertical lipid tube arrays using template-guided gentle hydration of dried lipid films without any external forces. A lipid solution was drop-dispensed onto a porous membrane and dried to form a lipid film. Then, the lipid-coated porous membrane was transferred to a glass substrate by using a UV-cured polymer layer to achieve tight bonding. Upon swelling with an appropriate buffer, expansion forces due to osmotic pressure during the gentle hydration process were highly constrained to confined pores, thereby resulting in the nucleation of tube-like lipid structures through the pores. Interestingly, according to the aspect ratio of pores (ARpore, pore length/pore diameter), different shapes of lipid structures, including vesicular, oval, and tube-like, were generated, which indicates the importance of the ARpore, as well as the pore diameter, during fabrication of tubular lipid structures. Also, this approach was easily modified with 1% chitosan to enhance the stability of the lipid tubes (>30 min in life time), by lipid coating twice and by using unsaturated lipids to increase tube length (>30 μm in length). Therefore, in the future, the simple but robust template-guided gentle hydration method will be a useful tool for fabricating addressable and engineered lipid tube arrays as a sensory unit.
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Affiliation(s)
- Min Cheol Park
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
| | - Pavithra Sukumar
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea. and Department of Biomedical Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Sang Kyung Kim
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea. and Department of Biomedical Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Ji Yoon Kang
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea. and Department of Biomedical Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Andreas Manz
- Korea Institute of Science and Technology in Europe, 66123 Saarbrücken, Germany
| | - Tae Song Kim
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea. and Department of Biomedical Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
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Park MC, Kim M, Lim GT, Kang SM, An SSA, Kim TS, Kang JY. Droplet-based magnetic bead immunoassay using microchannel-connected multiwell plates (μCHAMPs) for the detection of amyloid beta oligomers. Lab Chip 2016; 16:2245-53. [PMID: 27185215 DOI: 10.1039/c6lc00013d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Multiwell plates are regularly used in analytical research and clinical diagnosis but often require laborious washing steps and large sample or reagent volumes (typically, 100 μL per well). To overcome such drawbacks in the conventional multiwell plate, we present a novel microchannel-connected multiwell plate (μCHAMP) that can be used for automated disease biomarker detection in a small sample volume by performing droplet-based magnetic bead immunoassay inside the plate. In this μCHAMP-based immunoassay platform, small volumes (30-50 μL) of aqueous-phase working droplets are stably confined within each well by the simple microchannel structure (200-300 μm in height and 0.5-1 mm in width), and magnetic beads are exclusively transported into an adjacent droplet through the oil-filled microchannels assisted by a magnet array aligned beneath and controlled by a XY-motorized stage. Using this μCHAMP-based platform, we were able to perform parallel detection of synthetic amyloid beta (Aβ) oligomers as a model analyte for the early diagnosis of Alzheimer's disease (AD). This platform easily simplified the laborious and consumptive immunoassay procedure by achieving automated parallel immunoassay (32 assays per operation in 3-well connected 96-well plate) within 1 hour and at low sample consumption (less than 10 μL per assay) with no cumbersome manual washing step. Moreover, it could detect synthetic Aβ oligomers even below 10 pg mL(-1) concentration with a calculated detection limit of ∼3 pg mL(-1). Therefore, the μCHAMP and droplet-based magnetic bead immunoassay, with the combination of XY-motorized magnet array, would be a useful platform in the diagnosis of human disease, including AD, which requires low consumption of the patient's body fluid sample and automation of the entire immunoassay procedure for high processing capacity.
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Affiliation(s)
- Min Cheol Park
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
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Kho MC, Lee YJ, Park JH, Kim HY, Yoon JJ, Ahn YM, Tan R, Park MC, Cha JD, Choi KM, Kang DG, Lee HS. Fermented Red Ginseng Potentiates Improvement of Metabolic Dysfunction in Metabolic Syndrome Rat Models. Nutrients 2016; 8:E369. [PMID: 27322312 PMCID: PMC4924210 DOI: 10.3390/nu8060369] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 03/10/2016] [Revised: 05/27/2016] [Accepted: 06/02/2016] [Indexed: 01/08/2023] Open
Abstract
Metabolic syndrome including obesity, dyslipidemia and hypertension is a cluster of risk factors of cardiovascular disease. Fermentation of medicinal herbs improves their pharmacological efficacy. Red ginseng (RG), a widely used traditional herbal medicine, was reported with anti-inflammatory and anti-oxidant activity. Aim in the present study was to investigate that the effects of fermented red ginseng (FRG) on a high-fructose (HF) diet induced metabolic disorders, and those effects were compared to RG and losartan. Animals were divided into four groups: a control group fed a regular diet and tap water, and fructose groups that were fed a 60% high-fructose (HF) diet with/without RG 250 mg/kg/day or FRG 250 mg/kg/day for eight weeks, respectively. Treatment with FRG significantly suppressed the increments of body weight, liver weight, epididymal fat weight and adipocyte size. Moreover, FRG significantly prevented the development of metabolic disturbances such as hyperlipidemia and hypertension. Staining with Oil-red-o demonstrated a marked increase of hepatic accumulation of triglycerides, and this increase was prevented by FRG. FRG ameliorated endothelial dysfunction by downregulation of endothelin-1 (ET-1) and adhesion molecules in the aorta. In addition, FRG induced markedly upregulation of Insulin receptor substrate 1 (IRS-1) and glucose transporter type 4 (Glut4) in the muscle. These results indicate that FRG ameliorates obesity, dyslipidemia, hypertension and fatty liver in HF diet rats. More favorable pharmacological effects on HF diet induced metabolic disorders were observed with FRG, compared to an equal dose of RG. These results showed that the pharmacological activity of RG was enhanced by fermentation. Taken together, fermentated red ginseng might be a beneficial therapeutic approach for metabolic syndrome.
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Affiliation(s)
- Min Chul Kho
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Yun Jung Lee
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Ji Hun Park
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Hye Yoom Kim
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Jung Joo Yoon
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - You Mee Ahn
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Rui Tan
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Min Cheol Park
- Department of Oriental Medical Ophthalmology & Otolaryngology & Dermatology, College of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Jeong Dan Cha
- Department of Oral Microbiology and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Jeonbuk 54896, Korea.
| | - Kyung Min Choi
- Department of Research Development, Institute of Jinan Red Ginseng, Jinan, Jeonbuk 55442, Korea.
| | - Dae Gill Kang
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
| | - Ho Sub Lee
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
- Hanbang Body-Fluid Research Center, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea.
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Lee YJ, Lee SM, Cui X, Yoon JJ, Oh HC, Kim YC, Park MC, Kang DG, Lee HS. Quantitative evaluation of Oryeongsan and its action on water regulation in renal inner medullary collecting duct cells. J Ethnopharmacol 2016; 185:310-318. [PMID: 26979340 DOI: 10.1016/j.jep.2016.03.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 08/11/2015] [Revised: 02/03/2016] [Accepted: 03/11/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Oryeongsan (ORS, Wulingsan) has been reported to possess renal protective effects from renal diseases such as diabetes-induced renal damage, and nephrocalcinosis. AIM OF THE STUDY This study was conducted to evaluate the quantitative analysis and the inhibitory effect of ORS on hypertonic stress-induced water channel and apoptosis in murine inner medullary collecting duct cell line (mIMCD-3). MATERIALS AND METHODS Chromatographic and NMR spectroscopic analysis were performed and water balance regulation was determined by Western blot, RT-PCR, and immunofluorescnece. RESULTS Seven active principles (5-hydroxymethylfurfural, alismoxide, methyl(-)trans-cinnamate, adenine, guanosine, adenosine, and ferulic acid) in ORS were isolated and the structures were identified mainly by NMR spectroscopic analysis. In addition, contents of these metabolites in ORS were evaluated by HPLC analysis. Pretreatment with ORS significantly attenuated the hypertonic stress (175mM NaCl)-induced increase in protein levels of AQP2 and apical membrane insertion. ORS also attenuated osmolyte sodium-myo-inositol transporter (SMIT) expression and tonicity-responsive enhancer binding protein (TonEBP) mRNA under hypertonic stress. Those actions of ORS presented the similar effect of PKA inhibitor which AQP2 expression throughout the inhibition of vasopressin-mediated cAMP/PKA signal pathway. On the other hand, pretreatment with ORS attenuated hypertonic stress-induced cell death. Hypertonic stress-induced Bax or caspase-3 expression was decreased by ORS, resulting in anti-apoptotic effect. CONCLUSIONS The present data suggest that the beneficial effect of ORS in water balance and apoptosis against hypertonic stress of renal collecting ducts.
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Affiliation(s)
- Yun Jung Lee
- Department of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Iksan 570-749, Republic of Korea; Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - So Min Lee
- Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea; KM Fundamental Research Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-Gu, 34054 Daejeon, Republic of Korea.
| | - Xiang Cui
- Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea; College of Pharmacy, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - Jung Joo Yoon
- Department of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Iksan 570-749, Republic of Korea; Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - Hyun Cheol Oh
- Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea; College of Pharmacy, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - Youn Chul Kim
- Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea; College of Pharmacy, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - Min Cheol Park
- Department of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Iksan 570-749, Republic of Korea; Department of Oriental Medical Ophthalmology & Otolaryngology & Dermatology, College of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea.
| | - Dae Gill Kang
- Department of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Iksan 570-749, Republic of Korea; Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea.
| | - Ho Sub Lee
- Department of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Iksan 570-749, Republic of Korea; Hanbang Body-fluid Research Center, Wonkwang University, Iksan 570-749, Republic of Korea.
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Li X, Lee YJ, Kim HY, Tan R, Park MC, Kang DG, Lee HS. Beneficial Effects of Scutellaria baicalensis on Penile Erection in Streptozotocin-Induced Diabetic Rats. Am J Chin Med 2016; 44:305-20. [DOI: 10.1142/s0192415x1650018x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We have reported that ethanol extracts of the root from Scutellaria baicalensis Georgi (ESB) relax cavernous smooth muscles via the NO/cGMP system and Ca[Formula: see text]-sensitive K[Formula: see text] channels in the rabbit corpus cavernosum. In the present study, erectile function was assessed by intracavernous pressure (ICP) and mean arterial pressure (MAP) during electrical stimulation of the cavernous nerve. The ICP/MAP ratio was dose-dependently increased by the treatment of ESB in normal SD rats ([Formula: see text]). To investigate the beneficial effect of ESB on erectile dysfunction in a diabetic animal model, male SD rats were injected with streptozotocin (60[Formula: see text]mg/kg) and then 300[Formula: see text]mg/kg/day ESB was administered daily for eight weeks. In our in vivo study, administration of ESB in STZ rats significantly increased the ICP, ICP/MAP ratio, area under the curve (AUC), as well as the cavernous cGMP levels. Morphometric analyses showed that ESB administration increased both smooth muscle volume and the regular arrangement of collagen fibers compared to the STZ group. The protein expression levels of endothelial nitric oxide synthase (eNOS) and SM [Formula: see text]-actin from penile tissues were also significantly increased in the ESB-treated rats. Taken together, these results suggest that ESB ameliorates penile erectile dysfunction via the activation of the NO/cGMP pathways of the penile corpus cavernosum in a streptozotocin-induced diabetic rat model.
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Affiliation(s)
- Xiang Li
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
| | - Yun Jung Lee
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Body-Fluid Research Center, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea
| | - Hye Yoom Kim
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Body-Fluid Research Center, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea
| | - Rui Tan
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Body-Fluid Research Center, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea
| | - Min Cheol Park
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Department of Oriental Medical Ophthalmology and Otolaryngology and Dermatology, College of Oriental Medicine, Wonkwang University Shinyong-dong, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Dae Gill Kang
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Body-Fluid Research Center, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea
| | - Ho Sub Lee
- College of Oriental Medicine and Professional Graduate School of Oriental Medicine, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 540-749, Republic of Korea
- Body-Fluid Research Center, Wonkwang University, Shinyong-dong, Iksan, Jeonbuk 570-749, Republic of Korea
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22
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Shin KS, Ji JH, Park MC, Kim M, Kang JY. P1‐038: Highly sensitive detection of amyloid beta for Alzheimer's disease diagnosis using bead‐based impedance spectrometry. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.234] [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: 11/25/2022]
Affiliation(s)
| | - Jae Hoon Ji
- Korea Institute of Science and TechnologySeoulSouth Korea
- Yonsei UniversitySeoulSouth Korea
| | - Min Cheol Park
- Korea Institute of Science and TechnologySeoulSouth Korea
| | - Moojong Kim
- Korea Institute of Science and TechnologySeoulSouth Korea
| | - Ji Yoon Kang
- Korea Institute of Science and TechnologySeoulSouth Korea
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23
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Hur JY, Park MC, Suh KY, Park SH. Synchronization of cell cycle of Saccharomyces cerevisiae by using a cell chip platform. Mol Cells 2011; 32:483-8. [PMID: 22080373 PMCID: PMC3887694 DOI: 10.1007/s10059-011-0174-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [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: 08/23/2011] [Accepted: 08/30/2011] [Indexed: 01/30/2023] Open
Abstract
Cell synchrony is a critical requirement for the study of eukaryotic cells. Although several chemical and genetic methods of cell cycle synchronization are currently available, they have certain limitations, such as unnecessary perturbations to cells. We developed a novel cell cycle synchronization method that is based on a cell chip platform. The budding yeast, Saccharomyces cerevisiae, is a simple but useful model system to study cell biology and shares many similar features with higher eukaryotic cells. Single yeast cells were individually captured in the wells of a specially designed cell chip platform. When released from the cell chip, the yeast cells were synchronized, with all cells in the G1 phase. This method is non-invasive and causes minimal chemical and biological damage to cells. The capture and release of cells using cells chips with microwells of specific dimensions allows for the isolation of cells of a particular size and shape; this enables the isolation of cells of a given phase, because the size and shape of yeast cells vary with the phase of the cell cycle. To test the viability of synchronized cells, the yeast cells captured in the cell chip platform were assessed for response to mating pheromone (α-factor). The synchronized cells isolated using the cell chip were capable of mediating the mating signaling response and exhibited a dynamic and robust response behavior. By changing the dimensions of the well of the cell chip, cells of other cell cycle phases can also be isolated.
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Affiliation(s)
- Jae Young Hur
- Department of Biological Sciences, Seoul National University, Seoul 151-742, Korea
| | - Min Cheol Park
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea
| | - Kahp-Yang Suh
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea
- Institute of Advanced Machinery and Design (IAMD), Seoul National University, Seoul 151-742, Korea
| | - Sang-Hyun Park
- Department of Biological Sciences, Seoul National University, Seoul 151-742, Korea
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Park MC, Hur JY, Cho HS, Park SH, Suh KY. High-throughput single-cell quantification using simple microwell-based cell docking and programmable time-course live-cell imaging. Lab Chip 2011; 11:79-86. [PMID: 20957290 DOI: 10.1039/c0lc00114g] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Extracting single-cell information during cellular responses to external signals in a high-throughput manner is an essential step for quantitative single-cell analyses. Here, we have developed a simple yet robust microfluidic platform for measuring time-course single-cell response on a large scale. Our method combines a simple microwell-based cell docking process inside a patterned microfluidic channel, with programmable time-course live-cell imaging and software-aided fluorescent image processing. The budding yeast, Saccharomyces cerevisiae (S. cerevisiae), cells were individually captured in microwells by multiple sweeping processes, in which a cell-containing solution plug was actively migrating back and forth several times by a finger-pressure induced receding meniscus. To optimize cell docking efficiency while minimizing unnecessary flooding in subsequent steps, circular microwells of various channel dimensions (4-24 µm diameter, 8 µm depth) along with different densities of cell solution (1.5-6.0 × 10(9) cells per mL) were tested. It was found that the microwells of 8 µm diameter and 8 µm depth allowed for an optimal docking efficiency (>90%) without notable flooding issues. For quantitative single-cell analysis, time-course (time interval 15 minute, for 2 hours) fluorescent images of the cells stimulated by mating pheromone were captured using computerized fluorescence microscope and the captured images were processed using a commercially available image processing software. Here, real-time cellular responses of the mating MAPK pathway were monitored at various concentrations (1 nM-100 µM) of mating pheromone at single-cell resolution, revealing that individual cells in the population showed non-uniform signaling response kinetics.
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Affiliation(s)
- Min Cheol Park
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea
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25
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Hwang SY, Kwon KW, Jang KJ, Park MC, Lee JS, Suh KY. Adhesion assays of endothelial cells on nanopatterned surfaces within a microfluidic channel. Anal Chem 2010; 82:3016-22. [PMID: 20218573 DOI: 10.1021/ac100107z] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present a simple analytical method to measure adhesion of human umbilical vein endothelial cells (HUVECs) and calf pulmonary artery endothelial cells (CPAEs) using nanopatterned, biodegradable poly(lactic-co-glycolic acid) (PLGA) surfaces for potential applications to artificial tissue-engineered blood vessel. Various nanostructured PLGA surfaces (350 nm wide ridges/350 nm grooves, 350 nm ridges/700 nm grooves, 350 nm ridges/1750 nm grooves, 700 nm ridges/350 nm grooves, 1050 nm ridges/350 nm grooves, 1750 nm ridges/350 nm grooves) and flat (unpatterned) surfaces were fabricated on the bottom of polydimethylsiloxane (PDMS) microfluidic channel of 2 mm width and 60 microm height by using thermal imprinting and irreversible channel bonding. To measure adhesion strength of HUVECs and CPAEs, the cells were exposed to a range of shear stress (12, 40, and 80 dyn/cm(2)) within the channels for 20 min after a preculture for 3 days and the remaining cells were counted under each condition. The highest adhesion strength was found on the surface of 700 nm wide ridges, 350 nm wide grooves for both cell types. The enhanced adhesion on nanopatterned surfaces can be attributed to two aspects: (i) contact guidance along the line direction and (ii) clustered focal adhesions. In particular, the contact guidance induced cell alignment along the line directions, which in turn lowers wall shear stress applied to the cell surface, as supported by a simple hydrodynamic model based on cell morphology.
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Affiliation(s)
- Se Yon Hwang
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea
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26
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Abstract
We report 17 patients with a subungual glomus tumour. All complained of pain and tenderness when touched, and nine patients experienced severe pain in the cold. A transungual approach with nail plate avulsion on one side was used in all cases. A surgical microscope was used to localise and dissect the tumour and to repair the nail bed and matrix. This method has produced good results, without local recurrence or postoperative nail plate deformity.
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Affiliation(s)
- I J Lee
- Department of Plastic and Reconstructive Surgery, Ajou University Hospital, Suwon, Korea
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27
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Kwon KW, Choi SS, Lee SH, Kim B, Lee SN, Park MC, Kim P, Hwang SY, Suh KY. Label-free, microfluidic separation and enrichment of human breast cancer cells by adhesion difference. Lab Chip 2007; 7:1461-8. [PMID: 17960272 DOI: 10.1039/b710054j] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A label-free microfluidic method for separation and enrichment of human breast cancer cells is presented using cell adhesion as a physical marker. To maximize the adhesion difference between normal epithelial and cancer cells, flat or nanostructured polymer surfaces (400 nm pillars, 400 nm perpendicular, or 400 nm parallel lines) were constructed on the bottom of polydimethylsiloxane (PDMS) microfluidic channels in a parallel fashion using a UV-assisted capillary moulding technique. The adhesion of human breast epithelial cells (MCF10A) and cancer cells (MCF7) on each channel was independently measured based on detachment assays where the adherent cells were counted with increasing flow rate after a pre-culture for a period of time (e.g., one, two, and four hours). It was found that MCF10A cells showed higher adhesion than MCF7 cells regardless of culture time and surface nanotopography at all flow rates, resulting in label-free separation and enrichment of cancer cells. For the cell types used in our study, an optimum separation was found for 2 hours pre-culture on the 400 nm perpendicular line pattern followed by flow-induced detachment at a flow rate of 200 microl min(-1). The fraction of MCF7 cells was increased from 0.36 +/- 0.04 to 0.83 +/- 0.04 under these optimized conditions.
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Affiliation(s)
- Keon Woo Kwon
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Korea
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28
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Park MC, Goldman MA, Carpenter LL, Price LH, Friehs GM. Vagus nerve stimulation for depression: rationale, anatomical and physiological basis of efficacy and future prospects. Acta Neurochir Suppl 2007; 97:407-16. [PMID: 17691329 DOI: 10.1007/978-3-211-33081-4_46] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Treatment-resistant depression (TRD) is a major public health concern due to its high costs to society. One of the novel approaches for the treatment of depression is the vagus nerve stimulation (VNS). Therapeutic brain stimulation through delivery of pulsed electrical impulses to the left cervical vagus nerve now has established safety and efficacy as an adjunct treatment for medication-resistant epilepsy and has recently been approved as an adjunct long-term treatment for chronic or recurrent depression. There is considerable evidence from both animal and human neurochemical and neuroimaging studies, that the vagus nerve and its stimulation influence limbic and higher cortical brain regions implicated in mood disorders, providing a rationale for its possible role in the treatment of psychiatric disorders. Clinical studies (open-label and comparator with treatment in naturalistic setting) in patients with TRD have produced promising results, especially when the response rates at longer-term (one- and two-year) follow-up time points are considered. Ongoing research efforts will help determine the place of VNS in the armament of therapeutic modalities available for major depression.
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Affiliation(s)
- M C Park
- Department of Clinical Neurosciences Program in Neurosurgery, Brown Medical School, Rhode Island Hospital, Providence, RI, USA
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Park MC, Hur JY, Kwon KW, Park SH, Suh KY. Pumpless, selective docking of yeast cells inside a microfluidic channel induced by receding meniscus. Lab Chip 2006; 6:988-94. [PMID: 16874367 DOI: 10.1039/b602961b] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We present a simple cell docking method induced by receding meniscus to capture non-adherent yeast cells onto microwells inside a microfluidic channel. Microwells were fabricated either by capillary moulding of UV curable polyurethane acrylate (PUA) onto glass substrate or direct replica moulding of poly(dimethyl siloxane) (PDMS). A cell suspension of the budding yeast, Saccharomyces cerevisiae, was introduced into the microfluidic channel by surface tension driven capillary flow and a receding meniscus was subsequently generated by evaporation. As the meniscus progressed, one to multiple yeast cells were spontaneously captured onto microwells by lateral capillary force created at the bottom of the meniscus. Using this cell-based platform, we observed the response of yeast cells upon stimulation by a mating pheromone (alpha-factor) by monitoring the expression of green fluorescent protein (GFP) with time. It was observed that alpha-factor triggered the expression of GFP at 60 min after stimulation and the fluorescence intensity was sustained for an additional 60 min without changes.
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Affiliation(s)
- Min Cheol Park
- School of Mechanical and Aerospace Engineering and Institute of Advanced Machinery and Design, Seoul National University, Seoul 151-742, Korea
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30
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Abstract
OBJECTIVE To investigate serum profiles of inflammatory cytokines in patients with Takayasu's arteritis (TA) and to determine their correlations with disease activity of TA. METHODS Forty-nine patients with TA and 12 age- and sex-matched controls were studied. Blood samples were obtained and were divided into active and stable disease groups. Paired blood samples were available in 19 patients at the active stage before treatment and at the remitted stage after treatment. Serum tumour necrosis factor (TNF)-alpha, interferon (IFN)-gamma, interleukin (IL)-6, IL-12 and IL-18 levels were determined by enzyme-linked immunosorbent assay. RESULTS Serum TNF-alpha, IL-6 and IL-18 levels of patients with TA were significantly higher than those of controls (P<0.05), but IFN-gamma and IL-12 levels were not. Serum IL-6 and IL-18 levels were significantly higher in the active disease group than in the stable disease group (P<0.05), but the levels of TNF-alpha were not different between the groups. In the 19 patients with paired samples, serum IL-18 levels at the remitted stage after treatment were significantly decreased compared with the active stage before treatment (P<0.001). The changes in IL-18 levels between active and remitted stages correlated well with changes in erythrocyte sedimentation rate (P<0.001). CONCLUSION Serum IL-18 and IL-6 levels were elevated in patients with TA, especially in those with active disease. Serum IL-18 levels correlated well with disease activity of TA. These results suggest that IL-6 and IL-18 might contribute to the pathogenesis of TA and that IL-18 could be a useful marker for monitoring disease activity of TA.
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Affiliation(s)
- M C Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seodaemun-ku, Seoul, Korea 120-752
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31
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Park MC, Lee SW, Park YB, Lee SK, Choi D, Shim WH. Post-interventional immunosuppressive treatment and vascular restenosis in Takayasu's arteritis. Rheumatology (Oxford) 2005; 45:600-5. [PMID: 16352637 DOI: 10.1093/rheumatology/kei245] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To investigate the outcome of vascular interventions and the effect of post-interventional immunosuppressive treatment on the occurrence of vascular restenosis in patients with Takayasu's arteritis (TA). METHODS Forty-two patients with TA who had undergone vascular intervention and had serial angiographies before and after intervention were enrolled. The demographic and clinical data were collected at the time when the interventions were performed, and the intervention modalities and post-interventional medical treatments were evaluated. RESULTS Sixty-three interventions were performed in 42 patients. Twenty (31.7%) interventions restenosed 24.0 +/- 21.9 months after intervention; the likelihood decreasing as time passed. Estimates of arterial patency after intervention were 90.1% at 1 yr, 75.5% at 2 yr, 68.4% at 3 yr, 61.6% at 5 yr and 49.3% at 10 yr. According to the log rank test, interventions that were performed during the stable stage of the disease (P = 0.039) and those that were followed by treatment with glucocorticoids and immunosuppressive agents (P = 0.044) were independent variables for the maintenance of arterial patency. Their hazard ratios were 0.30 and 0.41, respectively. CONCLUSION Restenosis occurred in 31.7% of TA patients after intervention. A lower restenosis rate was observed when the vascular interventions were performed at the stable stage and when post-interventional immunosuppressive treatment was implemented.
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Affiliation(s)
- M C Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Seoul 120-752, Korea
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32
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Park MC, Belhaj-Saïf A, Gordon M, Cheney PD. Consistent features in the forelimb representation of primary motor cortex in rhesus macaques. J Neurosci 2001; 21:2784-92. [PMID: 11306630 PMCID: PMC6762507] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
The purpose of this study was to systematically map the forelimb area of primary motor cortex (M1) in rhesus macaques in an effort to investigate further the organization of motor output to distal and proximal muscles. We used stimulus-triggered averaging (StTAing) of electromyographic activity to map the cortical representation of 24 simultaneously recorded forelimb muscles. StTAs were obtained by applying 15 microA stimuli to M1 sites while the monkey performed a reach and prehension task. Motor output to body regions other than the forelimb (e.g., face, trunk, and hindlimb) was identified using repetitive intracortical microstimulation to evoke movements. Detailed, muscle-based maps of M1 revealed a central core of distal (wrist, digit, and intrinsic hand) muscle representation surrounded by a "horseshoe"-shaped zone of proximal (shoulder and elbow) muscle representation. The core distal and proximal zones were separated by a relatively large region representing combinations of both distal and proximal muscles. On the basis of its size and characteristics, we argue that this zone is not simply the result of stimulus-current spread, but rather a distinct zone within the forelimb representation containing cells that specify functional synergies of distal and proximal muscles. Electrode tracks extending medially from the medial arm of the proximal muscle representation evoked trunk and hindlimb responses. No distal or proximal muscle poststimulus effects were found in this region. These results argue against the existence of a second, major noncontiguous distal or proximal forelimb representation located medially within the macaque M1 representation.
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Affiliation(s)
- M C Park
- Department of Molecular and Integrative Physiology and Mental Retardation Research Center, and Departments of Pharmacology and Surgery, University of Kansas Medical Center, Kansas City, Kansas 66160, USA
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Park MC, Kim SW. Compensation of phase change on reflection in white-light interferometry for step height measurement. Opt Lett 2001; 26:420-422. [PMID: 18040340 DOI: 10.1364/ol.26.000420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present a method for compensating for the phase change on reflection in scanning white-light inteferometry that practically permits precise three-dimensional profile mapping of composite target surfaces that comprise multiple, dissimilar materials. The compensation method estimates the variation of phase change with the spectral distribution of the light source through a first-order approximation and then directly compensates for the measurement errors by performing two additional quasi-monochromatic phase-measuring interferometric measurements. Experimental results prove that the proposed compensation method is capable of reducing the measurement error in step height gauging to +/-5 nm or less.
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Cheney PD, Hill-Karrer J, Belhaj-Saïf A, McKiernan BJ, Park MC, Marcario JK. Cortical motor areas and their properties: implications for neuroprosthetics. Prog Brain Res 2001; 128:135-60. [PMID: 11105675 DOI: 10.1016/s0079-6123(00)28013-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- P D Cheney
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City 66160-7336, USA.
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Abstract
Studies of the neural control of movement often require or benefit from long-term recording of EMG activity from large numbers of muscles involved in a particular motor task. While chronic recording of EMG activity has been described in a number of previous monkey studies, the number of muscles recorded has been somewhat limited and the implantation approach has been highly invasive procedures. This paper presents two EMG implant fabrication and surgical implantation methods that are suitable for use in monkeys, relatively non-traumatic and capable of simultaneous recording from 24 or more muscles.
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Affiliation(s)
- M C Park
- Department of Molecular and Integrative Physiology and Mental Retardation Research Center, University of Kansas Medical Center, Kansas City, KS 66160-7336, USA
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36
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Kim SA, Kwak HJ, Park MC, Kim SR. Induction of reproductive organ-preferential histone genes by wounding or methyl jasmonate. Mol Cells 1998; 8:669-77. [PMID: 9895118] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
A cDNA clone CaH2B, which is highly expressed in floral buds, was isolated from hot pepper plants (Capsicum annuum) by the mRNA differential display method. Sequence analysis of CaH2B revealed that the clone contains an open reading frame of 145 amino acid residues, which are 77% identical to a maize H2B histone. The CaH2B mRNA was barely detectable in roots, was more abundant in anthers than in seedlings, and was expressed highest in floral buds and fruits. An in situ analysis of CaH2B in floral buds indicated that the transcript is highly present in the pollen and petals. Northern analysis of CaH4, a pepper H4 histone cDNA, which was obtained during the expressed sequence tag (EST) analysis of anther tissues, showed that the expression pattern was very similar to that of CaH2B, although the expression level was slightly different. Both histone genes were examined for inducibility by wounding, methyl jasmonate (MJ), or phytohormones. CaH2B and CaH4 were induced by wounding, and maximally induced ca. 3 h after wound treatment both in vitro and in planta. Airborne MJ greatly induced the expression of the genes as well. The inducing effect by wounding was suppressed by MJ, suggesting that wounding and MJ might have different roles in signal transduction for the histone gene induction. Southern blot hybridization showed that both H2B and H4 genes are comprised of multigene families in the hot pepper.
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MESH Headings
- Acetates/pharmacology
- Amino Acid Sequence
- Base Sequence
- Capsicum/chemistry
- Capsicum/drug effects
- Capsicum/genetics
- Cyclopentanes/pharmacology
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Plant/analysis
- DNA, Plant/genetics
- Gene Expression Regulation, Plant/drug effects
- Gene Expression Regulation, Plant/physiology
- Gene Library
- Genes, Plant/genetics
- Histones/genetics
- Molecular Sequence Data
- Oxylipins
- Plant Growth Regulators/pharmacology
- Plants, Medicinal
- Pollen/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Tissue Distribution
- Transcriptional Activation
- Wounds and Injuries/physiopathology
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Affiliation(s)
- S A Kim
- Department of Life Science, Sogang University, Seoul, Korea
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Abstract
OBJECTIVES This investigation attempted to determine whether the degree of fibronectin expression in the bladders of patients with invasive transitional cell carcinoma correlated with their clinical response to intravesical bacille Calmette-Guerin (BCG) therapy. METHODS Following transurethral resection of all invasive disease, 13 patients with Stages T2-T4 bladder cancer were administered intravesical BCG (fo 6 weeks followed by monthly instillations). Fibronectin expression in the patients' resected tumors and normal mucosa was determined by immunohistochemical staining techniques. Minimum disease-free follow-up was 60 months. RESULTS Only 1 of 13 patients had neither local nor systemic disease recurrence; 10 of 13 patients developed systemic disease and 7 patients died from metastases. Fibronectin expression was not correlated with the clinical response to BCG. CONCLUSIONS Intravesical BCG therapy for the treatment of muscle invasive transitional cell carcinoma of the bladder is ineffective. Fibronectin expression in the bladder of patients with invasive disease is variable and does not correlate significantly with the clinical response to BCG therapy.
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Affiliation(s)
- R S Rosenbaum
- Department of Urology, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Fleischmann JD, Park MC, Hassan MO. Fibronectin expression on surgical specimens correlated with the response to intravesical bacillus Calmette-Guerin therapy. J Urol 1993; 149:268-71. [PMID: 8426398 DOI: 10.1016/s0022-5347(17)36052-4] [Citation(s) in RCA: 16] [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: 01/30/2023]
Abstract
Attachment of bacillus Calmette-Guerin (BCG) organisms to the bladder during intravesical therapy is thought to be mediated exclusively by the glycoprotein fibronectin, which is expressed variably on epithelial surfaces and on basement membranes. We examined the relationship between the degree of fibronectin expressed on surgical specimens obtained from 50 candidates for BCG therapy and the subsequent clinical response. Immunoperoxidase staining for fibronectin was performed on tumor, nonadjacent normal mucosa and basement membrane tissues, and the intensity of the staining was scored on a scale of 0 to 3+ (control 2+). In the absence of recurrence at quarterly surveillance cystoscopy, a course of Tice BCG therapy consisted of 6 weekly and 12 monthly instillations. Recurrence of noninvasive tumor prompted a second BCG course. Followup ranged from 24 to 66 months (median 40 months). Of the 50 patients (11 with carcinoma in situ) disease progression occurred in 9 (none with carcinoma in situ). Compared to the results for tumors or for basement membranes, the degree of fibronectin expression on normal mucosa was well correlated with the clinical response (r = 0.59, p < 0.001 by Kendall Tau B). Routine assessment of fibronectin expression on the normal mucosa associated with superficial bladder cancer may be useful for predicting the clinical response to BCG therapy.
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Affiliation(s)
- J D Fleischmann
- Division of Urology, Case Western Reserve University, Cleveland, Ohio
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Abstract
A case of primary non-Hodgkin's malignant lymphoma of the vulva which occurred in a 68-year-old woman is presented. Non-Hodgkin's malignant lymphoma is infrequently involved in the female genital tract. Moreover, primary vulvar involvement of this tumor is very rare. To date only 6 cases have been reported in the literature. To our knowledge this is the first reported case of a non-Hodgkin's malignant lymphoma of the vulva in Korea.
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Affiliation(s)
- J H Nam
- Department of Obstetrics and Gynecology, School of Medicine, Ulsan University, Seoul, Korea
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40
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Yazdy AM, Park MC, Supinski G. Restrictive ventilatory defect associated with pulmonary hypertension in mixed connective tissue disease. J Rheumatol 1990; 17:121-3. [PMID: 2313666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Abstract
While it is believed that placental tissue is very active in lipid metabolism, the nature of lipid containing particles secreted (if any) by this tissue is not known. Lipoprotein profile of human placental tissue was analysed by gel filtration, gel electrophoresis and electron microscopy. Our studies demonstrated the presence of lipoproteins with unusual compositions. A novel major lipoprotein (which eluted in the same position on plasma VLDL) was characterized. While this lipoprotein floated at density greater than 1.006 gr/ml and contained apo B (same as plasma VLDL) it differed from plasma VLDL in a) size, b) contining a significant amount of apo Al, and c) carried bulk of the cholesterol (80% in free form) and phospholipids. This study suggests that placental tissue might contain unique lipoproteins perhaps serving specific metabolic needs.
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Affiliation(s)
- M C Park
- Department of Internal Medicine, University of Cincinnati Medical Center, Ohio 45627
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Pritchard PH, McLeod R, Frohlich J, Park MC, Kudchodkar BJ, Lacko AG. Lecithin:cholesterol acyltransferase in familial HDL deficiency (Tangier disease). Biochim Biophys Acta 1988; 958:227-34. [PMID: 3122840 DOI: 10.1016/0005-2760(88)90181-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
These studies were performed to investigate the relationship between the enzyme lecithin:cholesterol acyltransferase and plasma lipoproteins in Tangier disease, a condition characterized by a virtual absence of high-density lipoproteins (HDLs) and an accumulation of cholesteryl esters in peripheral tissues. Apolipoprotein A-I was nearly absent from the patient's plasma (1% of the normal levels were found). However, apolipoprotein A-I purified from the plasma of the Tangier disease patient, was found to activate both purified and the plasma enzyme. At lower apolipoprotein concentrations (up to 25 micrograms/ml), about twice the amount of Tangier apolipoprotein A-I was required to achieve a certain level of lecithin:cholesterol acyltransferase activity as compared with the activating potential of the normal apolipoprotein. Gel chromatography studies revealed that as in normal plasma, lecithin:cholesterol acyltransferase in Tangier plasma was associated with an HDL-size lipoprotein fraction. However, unlike in normal plasma, this lipoprotein complex (containing lecithin:cholesterol acyltransferase) was not removed from Tangier plasma by immunoaffinity chromatography utilizing immobilized anti-apolipoprotein A-I antibodies. Plasma incubation studies showed that free cholesterol was primarily supplied by LDL in normal plasma, whereas both LDL and VLDL donated the free cholesterol for lecithin:cholesterol acyltransferase reaction in Tangier plasma. The majority of the cholesteryl esters, generated during the incubation experiments, were transferred back to LDL in normal plasma, whereas in Tangier plasma both LDL and VLDL served as cholesteryl ester acceptors. The cholesteryl ester transfer from HDL to lower-density lipoproteins was lower in Tangier plasma as compared to this process in a normal control, suggesting that a minimal cholesteryl ester core may be required for the stability of HDL.
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Affiliation(s)
- P H Pritchard
- Shaughnessy Hospital Lipid Research Group, Department of Pathology, University of British Columbia, Vancouver, Canada
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McCullough AJ, Barron D, Mullen KD, Petrelli M, Park MC, Mukhtar H, Bickers DR. Fecal protoporphyrin excretion in erythropoietic protoporphyria: effect of cholestyramine and bile acid feeding. Gastroenterology 1988; 94:177-81. [PMID: 3335288 DOI: 10.1016/0016-5085(88)90627-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [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] [Indexed: 01/05/2023]
Abstract
The effect of cholestyramine and bile acid feeding upon fecal, red blood cell, and plasma protoporphyrin levels was evaluated in a patient with erythropoietic protoporphyria and evidence of hepatic damage. After a basal period on a controlled diet, bile acids alone were administered (300-900 mg) daily for 9 days, followed by cholestyramine (12 g) plus bile acids (900 mg) daily for 7 days, and cholestyramine alone (12 g) daily for 6 days. There was no substantial change in either the red blood cell or plasma protoporphyrin concentrations during any treatment period. However, cholestyramine and cholestyramine combined with bile acids caused a threefold increase in fecal protoporphyrin excretion, whereas bile acids alone had no effect in this regard. After 1 yr of cholestyramine therapy, fecal excretion of protoporphyrin remained elevated with concurrent improvement in liver function tests and photosensitivity. This study indicates that cholestyramine but not bile acids can substantially increase protoporphyrin excretion and therefore may be capable of ameliorating the hepatotoxicity that may occur in selected patients with erythropoietic protoporphyria.
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Affiliation(s)
- A J McCullough
- Division of Gastroenterology, Cleveland Metropolitan General Hospital, Ohio
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46
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Abstract
This paper describes the effect of an ionic (sodium dodecyl sulfate; SDS) and a nonionic detergent (Triton X-100) on the substrate and enzyme components of the lecithin: cholesterol acyltransferase (LCAT) reaction. When the enzyme sources (purified or partially purified) or the respective substrates [high-density lipoproteins (HDL) or proteoliposomes] were preincubated with detergents, a consistent trend in LCAT activity was only seen when partially purified LCAT was used as the enzyme source. This trend indicated an approximately 25% increase in enzyme activity over the control when 10(-4) M SDS and 2 X 10(-3)% Triton X-100 were present in the preincubation mixtures, respectively. Those observations suggested that, during the preincubations and subsequent assays, the enzyme (in the presence of detergents) was allowed to dissociate from the endogenous substrate and subsequently interact with the exogenous substrate molecules. Additional experiments utilizing molecular-sieve chromatography with whole plasma and partially purified enzyme also showed that dissociation of LCAT/lipoprotein complexes occurred in the presence of detergent. SDS was also shown to enhance the reaction of LCAT in whole plasma with anti-LCAT antibody in an enzyme-linked immunoassay system, indicating that the detergent treatment facilitated the exposure of additional antigenic sites, perhaps via dissociation of the enzyme from plasma lipoproteins.
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Dahms BB, Petrelli M, Wyllie R, Henoch MS, Halpin TC, Morrison S, Park MC, Tavill AS. Arteriohepatic dysplasia in infancy and childhood: a longitudinal study of six patients. Hepatology 1982; 2:350-8. [PMID: 7076119 DOI: 10.1002/hep.1840020311] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Reid JD, Kommareddi S, Lankerani M, Park MC. Chronic expanding hematomas. A clinicopathologic entity. JAMA 1980; 244:2441-2. [PMID: 6448929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Chronic exapnding hematomas occur in many locations, often simulating neoplasms. All have the same structure with a central mass of blood, a wall of granulation tissue, and dense, fibrous tissue at the periphery. The self-perpetuating exapnding nature of the lesion appears to be due to the irritant effects of blood and its breakdown products, causing repeated exudation or bleeding from capillaries in the granulation tissue.
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