1
|
Kwak Y, Kim HG, Seok J, Kim S, Kim EM, Kim A. The Critical Role of Intracellular Bacterial Communities in Uncomplicated Recurrent Urinary Cystitis: A Comprehensive Review of Detection Methods and Diagnostic Potential. Int Neurourol J 2024; 28:4-10. [PMID: 38569615 PMCID: PMC10990762 DOI: 10.5213/inj.2448066.033] [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: 02/07/2024] [Accepted: 03/06/2024] [Indexed: 04/05/2024] Open
Abstract
Urinary tract infections (UTIs) are among the most common bacterial infections worldwide and are particularly prevalent in women. Recurrent UTIs significantly diminish quality of life due to their symptoms and frequent relapses. Patients often experience immediate relapse following slightly strenuous activities or intense psychological stress. In this review, we explore why infections persist despite the advent of various treatments and suggest strategies to manage recurrent cystitis by targeting the mechanisms of adhesion and infection. Vitamin D levels and the expression of neutrophil gelatinase-associated lipocalin are linked to the recurrence of UTIs. During a UTI, bacteria employ adhesins to invade the urinary tract, adhere to urothelial cells, and then penetrate these cells, where they rapidly multiply to establish intracellular bacterial communities. Bacteria can also form quiescent intracellular reservoirs that escape immune responses and antibiotic treatments, leading to recurrence under certain conditions. The surface proteins of bacteria and D-mannose are crucial in the adhesion of bacteria to the urothelium. Understanding these processes provides valuable insights into potential therapeutic approaches that focus on preventing bacterial attachment and cluster formation. By disrupting the ability of bacteria to adhere to and form clusters on cells, we can better manage recurrent UTIs and improve patient outcomes.
Collapse
Affiliation(s)
- Yeonjoo Kwak
- Department of Stem Cell & Regenerative Biotechnology, Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Hyeong Gon Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Jaekwon Seok
- Department of Stem Cell & Regenerative Biotechnology, Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Sehwan Kim
- Department of Biomedical Engineering, School of Medicine, Dankook University, Cheonan, Korea
| | - Eun-Mee Kim
- Department of Paramedicine, Korea Nazarene University, Cheonan, Korea
| | - Aram Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, CA, USA
| |
Collapse
|
2
|
Lee M, Seok J, Saha SK, Cho S, Jeong Y, Gil M, Kim A, Shin HY, Bae H, Do JT, Kim YB, Cho SG. Alterations and Co-Occurrence of C-MYC, N-MYC, and L-MYC Expression are Related to Clinical Outcomes in Various Cancers. Int J Stem Cells 2023; 16:215-233. [PMID: 37105559 DOI: 10.15283/ijsc22188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/03/2023] [Accepted: 02/15/2023] [Indexed: 04/29/2023] Open
Abstract
Background and Objectives MYC, also known as an oncogenic reprogramming factor, is a multifunctional transcription factor that maintains induced pluripotent stem cells (iPSCs). Although MYC is frequently upregulated in various cancers and is correlated with a poor prognosis, MYC is downregulated and correlated with a good prognosis in lung adenocarcinoma. MYC and two other MYC family genes, MYCN and MYCL, have similar structures and could contribute to tumorigenic conversion both in vitro and in vivo. Methods and Results We systematically investigated whether MYC family genes act as prognostic factors in various human cancers. We first evaluated alterations in the expression of MYC family genes in various cancers using the Oncomine and The Cancer Genome Atlas (TCGA) database and their mutation and copy number alterations using the TCGA database with cBioPortal. Then, we investigated the association between the expression of MYC family genes and the prognosis of cancer patients using various prognosis databases. Multivariate analysis also confirmed that co-expression of MYC/MYCL/MYCN was significantly associated with the prognosis of lung, gastric, liver, and breast cancers. Conclusions Taken together, our results demonstrate that the MYC family can function not only as an oncogene but also as a tumor suppressor gene in various cancers, which could be used to develop a novel approach to cancer treatment.
Collapse
Affiliation(s)
- Moonjung Lee
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
- Department of Advanced Translational Medicine, Konkuk University, Seoul, Korea
| | - Jaekwon Seok
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Subbroto Kumar Saha
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Sungha Cho
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Yeojin Jeong
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Minchan Gil
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Aram Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Ha Youn Shin
- Department of Biomedical Science & Engineering, KU Convergence Science and Technology Institute, Konkuk University, Seoul, Korea
| | - Hojae Bae
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Jeong Tae Do
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| | - Young Bong Kim
- Department of Biomedical Science & Engineering, KU Convergence Science and Technology Institute, Konkuk University, Seoul, Korea
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology & Institute of Advanced Regenerative Science, Konkuk University, Seoul, Korea
| |
Collapse
|
3
|
Seok J, Kwak HJ, Kwak Y, Lee M, Park KS, Kim A, Cho SG. Anti-oncogenic effects of dutasteride, a dual 5-alpha reductase inhibitor and a drug for benign prostate hyperplasia, in bladder cancer. J Transl Med 2023; 21:129. [PMID: 36800968 PMCID: PMC9938606 DOI: 10.1186/s12967-023-03972-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 02/06/2023] [Indexed: 02/19/2023] Open
Abstract
BACKGROUND The incidence of bladder cancer (BCa) is approximately four times higher in men than in women. To develop effective BCa treatments, there is an urgent need to understand the differences in the BCa control mechanisms based on gender. Our recent clinical study showed that androgen suppression therapy using 5α-reductase inhibitors and androgen deprivation therapy affects BCa progression, but the underlying mechanisms are still unknown. METHODS mRNA expression levels of the androgen receptor (AR) and SLC39A9 (membrane AR) in T24 and J82 BCa cells were evaluated by reverse transcription-PCR (RT-PCR). The effect of dutasteride, a 5α-reductase inhibitor, in BCa progression was determined in cells transfected with control and AR-overexpressing plasmids. In addition, cell viability and migration assays, RT-PCR, and western blot analysis were performed to analyze the effect of dutasteride on BCa in the presence of testosterone. Finally, steroidal 5α-reductase 1 (SRD5A1), one of the dutasteride target genes, was silenced in T24 and J82 BCa cells using control and shRNA-containing plasmids, and the oncogenic role of SRD5A1 was evaluated. RESULTS Dutasteride treatment led to significant inhibition of the testosterone-induced increase dependent on AR and SLC39A9 in cell viability and migration of T24 and J82 BCa cells and induced alterations in the expression level of cancer progression proteins, such as metalloproteases, p21, BCL-2, NF-KB, and WNT in AR-negative BCa. Furthermore, the bioinformatic analysis showed that mRNA expression levels of SRD5A1 were significantly higher in BCa tissues than in normal paired tissues. A positive correlation between SRD5A1 expression and poor patient survival was observed in patients with BCa. Also, Dutasteride treatment reduced cell proliferation and migration via blocking the SRD5A1 in BCa. CONCLUSIONS Dutasteride inhibited testosterone-induced BCa progression dependent on SLC39A9 in AR-negative BCa and repressed oncogenic signaling pathways, including those of metalloproteases, p21, BCL-2, NF-KB, and WNT. Our results also suggest that SRD5A1 plays a pro-oncogenic role in BCa. This work provides potential therapeutic targets for the treatment of BCa.
Collapse
Affiliation(s)
- Jaekwon Seok
- grid.258676.80000 0004 0532 8339Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, 05029 Republic of Korea
| | - Hee Jeong Kwak
- grid.258676.80000 0004 0532 8339Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, 05029 Republic of Korea
| | - Yeonjoo Kwak
- grid.258676.80000 0004 0532 8339Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, 05029 Republic of Korea
| | - Moonjung Lee
- grid.258676.80000 0004 0532 8339Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, 05029 Republic of Korea ,grid.258676.80000 0004 0532 8339Department of Advanced Translational Medicine, Konkuk University, Seoul, 05029 Republic of Korea
| | - Kyoung Sik Park
- grid.411120.70000 0004 0371 843XDepartment of Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, 05030 Republic of Korea
| | - Aram Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, 05030, Republic of Korea.
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, 05029, Republic of Korea.
| |
Collapse
|
4
|
Shin Y, Choi HY, Kwak Y, Yang GM, Jeong Y, Jeon TI, Seok J, Lee ER, Kim JH, Jeon K, Dayem AA, Lim KM, Cho SG. TMBIM6-mediated miR-181a expression regulates breast cancer cell migration and invasion via the MAPK/ERK signaling pathway. J Cancer 2023; 14:554-572. [PMID: 37057283 PMCID: PMC10088543 DOI: 10.7150/jca.81600] [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: 12/13/2022] [Accepted: 02/08/2023] [Indexed: 03/14/2023] Open
Abstract
Transmembrane Bax Inhibitor Motif-containing 6 (TMBIM6) has been reported to regulate cell death pathways and is overexpressed in several types of cancers. In this study, we investigated whether high expression of TMBIM6 in breast cancer was significantly associated with cancer invasiveness. Knockdown of TMBIM6 reduced proliferation and migration of invasive breast cancer cells through downregulation of the MAPK/ERK signaling pathway. Moreover, we suggested that expression of miR-181a was significantly suppressed upon TMBIM6 knockdown. In contrast, overexpression of TMBIM6 significantly increased cell invasion and migration through up-regulation of mesenchymal markers and matrix metalloproteinase-9 (MMP-9) and enhanced activation of the MAPK/ERK signaling pathway. We also observed that up-regulation of TMBIM6 significantly increased the expression of miR-181a by TMBIM6-mediated pathway. TMBIM6 and miR-181a-mediated ERK activation induced the expression of Snail-1 and Snail-2 in FOSL-1/C-JUN-dependent manner. Overall, our data demonstrated that TMBIM6-induced miR-181a up-regulation plays an important role in the efficient modulation of migration and invasion of breast cancer cells.
Collapse
|
5
|
Seok J, Gil M, Dayem AA, Saha SK, Cho SG. Multi-Omics Analysis of SOX4, SOX11, and SOX12 Expression and the Associated Pathways in Human Cancers. J Pers Med 2021; 11:jpm11080823. [PMID: 34442467 PMCID: PMC8400412 DOI: 10.3390/jpm11080823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/06/2021] [Accepted: 08/20/2021] [Indexed: 01/08/2023] Open
Abstract
The Sry-related HMG BOX (SOX) gene family encodes transcription factors containing highly conserved high-mobility group domains that bind to the minor groove in DNA. Although some SOX genes are known to be associated with tumorigenesis and cancer progression, their expression and prognostic value have not been systematically studied. We performed multi-omic analysis to investigate the expression of SOX genes in human cancers. Expression and phylogenetic tree analyses of the SOX gene family revealed that the expression of three closely related SOX members, SOX4, SOX11, and SOX12, was increased in multiple cancers. Expression, mutation, and alteration of the three SOX members were evaluated using the Oncomine and cBioPortal databases, and the correlation between these genes and clinical outcomes in various cancers was examined using the Kaplan–Meier, PrognoScan, and R2 database analyses. The genes commonly correlated with the three SOX members were categorized in key pathways related to the cell cycle, mitosis, immune system, and cancer progression in liver cancer and sarcoma. Additionally, functional protein partners with three SOX proteins and their probable signaling pathways were explored using the STRING database. This study suggests the prognostic value of the expression of three SOX genes and their associated pathways in various human cancers.
Collapse
Affiliation(s)
| | | | | | | | - Ssang-Goo Cho
- Correspondence: ; Tel.: +82-2-450-4207 or +82-2-444-4207
| |
Collapse
|
6
|
Abstract
Cancer stem cells (CSCs) are a subpopulation of cancer that can self-renew and differentiate into large tumor masses. Evidence accumulated to date shows that CSCs affect tumor proliferation, recurrence, and resistance to chemotherapy. Recent studies have shown that, like stem cells, CSCs maintain cells with self-renewal capacity by means of asymmetric division and promote cell proliferation by means of symmetric division. This cell division is regulated by fate determinants, such as the NUMB protein, which recently has also been confirmed as a tumor suppressor. Loss of NUMB expression leads to uncontrolled proliferation and amplification of the CSC pool, which promotes the Notch signaling pathway and reduces the expression of the p53 protein. NUMB genes are alternatively spliced to produce six functionally distinct isoforms. An interesting recent discovery is that the protein NUMB isoform produced by alternative splicing of NUMB plays an important role in promoting carcinogenesis. In this review, we summarize the known functions of NUMB and NUMB isoforms related to the proliferation and generation of CSCs.
Collapse
Affiliation(s)
- Hye Yeon Choi
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Jaekwon Seok
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Geun-Ho Kang
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Kyung Min Lim
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| |
Collapse
|
7
|
Choi HY, Seok J, Kang GH, Lim KM, Cho SG. The role of NUMB/NUMB isoforms in cancer stem cells. BMB Rep 2021; 54:335-343. [PMID: 34078527 PMCID: PMC8328821] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/04/2021] [Accepted: 05/17/2021] [Indexed: 12/17/2023] Open
Abstract
Cancer stem cells (CSCs) are a subpopulation of cancer that can self-renew and differentiate into large tumor masses. Evidence accumulated to date shows that CSCs affect tumor proliferation, recurrence, and resistance to chemotherapy. Recent studies have shown that, like stem cells, CSCs maintain cells with self-renewal capacity by means of asymmetric division and promote cell proliferation by means of symmetric division. This cell division is regulated by fate determinants, such as the NUMB protein, which recently has also been confirmed as a tumor suppressor. Loss of NUMB expression leads to uncontrolled proliferation and amplification of the CSC pool, which promotes the Notch signaling pathway and reduces the expression of the p53 protein. NUMB genes are alternatively spliced to produce six functionally distinct isoforms. An interesting recent discovery is that the protein NUMB isoform produced by alternative splicing of NUMB plays an important role in promoting carcinogenesis. In this review, we summarize the known functions of NUMB and NUMB isoforms related to the proliferation and generation of CSCs. [BMB Reports 2021; 54(7): 335-343].
Collapse
Affiliation(s)
- Hye Yeon Choi
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA, Seoul 05029, Korea
| | - Jaekwon Seok
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Geun-Ho Kang
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Kyung Min Lim
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center (MCRC), Konkuk University, Seoul 05029, Korea
| |
Collapse
|
8
|
Kim K, Gil M, Dayem AA, Choi S, Kang GH, Yang GM, Cho S, Jeong Y, Kim SJ, Seok J, Kwak HJ, Kumar Saha S, Kim A, Cho SG. Improved Isolation and Culture of Urine-Derived Stem Cells (USCs) and Enhanced Production of Immune Cells from the USC-Derived Induced Pluripotent Stem Cells. J Clin Med 2020; 9:E827. [PMID: 32197458 PMCID: PMC7141314 DOI: 10.3390/jcm9030827] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/13/2020] [Accepted: 03/16/2020] [Indexed: 12/14/2022] Open
Abstract
The availability of autologous adult stem cells is one of the essential prerequisites for human stem cell therapy. Urine-derived stem cells (USCs) are considered as desirable cell sources for cell therapy because donor-specific USCs are easily and non-invasively obtained from urine. Efficient isolation, expansion, and differentiation methods of USCs are necessary to increase their availability. Here, we developed a method for efficient isolation and expansion of USCs using Matrigel, and the rho-associated protein kinase (ROCK) inhibitor, Y-27632. The prepared USCs showed significantly enhanced migration, colony forming capacity, and differentiation into osteogenic or chondrogenic lineage. The USCs were successfully reprogramed into induced pluripotent stem cells (USC-iPSCs) and further differentiated into kidney organoid and hematopoietic progenitor cells (HPCs). Using flavonoid molecules, the isolation efficiency of USCs and the production of HPCs from the USC-iPSCs was increased. Taken together, we present an improved isolation method of USCs utilizing Matrigel, a ROCK inhibitor and flavonoids, and enhanced differentiation of USC-iPSC to HPC by flavonoids. These novel findings could significantly enhance the use of USCs and USC-iPSCs for stem cell research and further application in regenerative stem cell-based therapies.
Collapse
Affiliation(s)
- Kyeongseok Kim
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Minchan Gil
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Ahmed Abdal Dayem
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Sangbaek Choi
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Geun-Ho Kang
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Gwang-Mo Yang
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Sungha Cho
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Yeojin Jeong
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Se Jong Kim
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Jaekwon Seok
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Hee Jeong Kwak
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Subbroto Kumar Saha
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| | - Aram Kim
- Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul 05029, Korea;
| | - Ssang-Goo Cho
- Department of Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (K.K.); (M.G.); (A.A.D.); (S.C.); (G.-H.K.); (G.-M.Y.); (S.C.); (Y.J.); (S.J.K.); (J.S.); (H.J.K.); (S.K.S.)
| |
Collapse
|
9
|
Roussel R, Andonian G, Lynn W, Sanwalka K, Robles R, Hansel C, Deng A, Lawler G, Rosenzweig JB, Ha G, Seok J, Power JG, Conde M, Wisniewski E, Doran DS, Whiteford CE. Single Shot Characterization of High Transformer Ratio Wakefields in Nonlinear Plasma Acceleration. Phys Rev Lett 2020; 124:044802. [PMID: 32058730 DOI: 10.1103/physrevlett.124.044802] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/12/2019] [Indexed: 06/10/2023]
Abstract
Plasma wakefields can enable very high accelerating gradients for frontier high energy particle accelerators, in excess of 10 GeV/m. To overcome limits on single stage acceleration, specially shaped drive beams can be used in both linear and nonlinear plasma wakefield accelerators (PWFA), to increase the transformer ratio, implying that the drive beam deceleration is minimized relative to acceleration obtained in the wake. In this Letter, we report the results of a nonlinear PWFA, high transformer ratio experiment using high-charge, longitudinally asymmetric drive beams in a plasma cell. An emittance exchange process is used to generate variable drive current profiles, in conjunction with a long (multiple plasma wavelength) witness beam. The witness beam is energy modulated by the wakefield, yielding a response that contains detailed spectral information in a single-shot measurement. Using these methods, we generate a variety of beam profiles and characterize the wakefields, directly observing transformer ratios up to R=7.8. Furthermore, a spectrally based reconstruction technique, validated by 3D particle-in-cell simulations, is introduced to obtain the drive beam current profile from the decelerating wake data.
Collapse
Affiliation(s)
- R Roussel
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - G Andonian
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - W Lynn
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - K Sanwalka
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - R Robles
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - C Hansel
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - A Deng
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - G Lawler
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - J B Rosenzweig
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - G Ha
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Seok
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J G Power
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M Conde
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - E Wisniewski
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D S Doran
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - C E Whiteford
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| |
Collapse
|
10
|
Abdal Dayem A, Lee SB, Kim K, Lim KM, Jeon TI, Seok J, Cho ASG. Production of Mesenchymal Stem Cells Through Stem Cell Reprogramming. Int J Mol Sci 2019; 20:ijms20081922. [PMID: 31003536 PMCID: PMC6514654 DOI: 10.3390/ijms20081922] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [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: 03/12/2019] [Revised: 04/10/2019] [Accepted: 04/15/2019] [Indexed: 12/26/2022] Open
Abstract
Mesenchymal stem cells (MSCs) possess a broad spectrum of therapeutic applications and have been used in clinical trials. MSCs are mainly retrieved from adult or fetal tissues. However, there are many obstacles with the use of tissue-derived MSCs, such as shortages of tissue sources, difficult and invasive retrieval methods, cell population heterogeneity, low purity, cell senescence, and loss of pluripotency and proliferative capacities over continuous passages. Therefore, other methods to obtain high-quality MSCs need to be developed to overcome the limitations of tissue-derived MSCs. Pluripotent stem cells (PSCs), including embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), are considered potent sources for the derivation of MSCs. PSC-derived MSCs (PSC-MSCs) may surpass tissue-derived MSCs in proliferation capacity, immunomodulatory activity, and in vivo therapeutic applications. In this review, we will discuss basic as well as recent protocols for the production of PSC-MSCs and their in vitro and in vivo therapeutic efficacies. A better understanding of the current advances in the production of PSC-MSCs will inspire scientists to devise more efficient differentiation methods that will be a breakthrough in the clinical application of PSC-MSCs.
Collapse
Affiliation(s)
- Ahmed Abdal Dayem
- Department of Stem Cell & Regenerative Biotechnology, Incurable Disease Animal Model and Stem Cell Institute (IDASI), Konkuk University, Gwangjin-gu, Seoul 05029, Korea.
| | | | | | | | | | | | | |
Collapse
|
11
|
Seok J, Lee JS, Jeong KY, Lee CM. Association between Systolic Blood Pressure after Thrombolysis and Early Neurological Improvement in Ischaemic Stroke Patients. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791702400304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction This study aimed to evaluate the relationship between systolic blood pressures (SBPs) within 12 hours after intravenous recombinant tissue plasminogen activator (rtPA) treatment and early neurological outcomes. Methods This was a retrospective observational study of acute ischaemic stroke (AIS) patients who received intravenous rtPA administration. SBPs at the time of rtPA bolus and thereafter every hour were collected. The mean, standard deviation, and coefficient of variation values of SBP during the periods of 0-2 h, 2-6 h, and 6-12 h were calculated. The primary outcome was major neurologic improvement (MNI) at 24 hours after thrombolysis. Results Serial measures of SBPs revealed different 12-hour courses between the patients with and without MNI. The difference of SBP tendency was statistically significant (p=0.013). In univariate analysis, patients with MNI showed lower levels of mean SBPs during the periods of 2-6 h and 6-12 h (p=0.030 and p=0.005, respectively), and higher frequency of very early neurologic improvement (VENI) at the end of rtPA infusion (p<0.001). In logistic regression analysis, VENI at 1 h, mean SBP value during 6-12 h, and atrial fibrillation were independently related to MNI at 24 h. Conclusions SBP level during the first 12 hours after intravenous rtPA treatment may be an important clinical factor that is associated with early neurological improvement of AIS patients.
Collapse
Affiliation(s)
- J Seok
- Kyung Hee University Medical Center, Department of Emergency Medicine, Seoul, Korea
| | - JS Lee
- Kyung Hee University Medical Center, Department of Emergency Medicine, Seoul, Korea
| | - KY Jeong
- Kyung Hee University Medical Center, Department of Emergency Medicine, Seoul, Korea
| | - CM Lee
- Kyung Hee University, Department of Medicine, Graduate School, Seoul, Korea
| |
Collapse
|
12
|
Hong JY, Seok J, Kim JM, Jang YJ, Kim BJ. Successful treatment of trichoepithelioma with a novel insulated, monopolar, radiofrequency microneedle device. Clin Exp Dermatol 2017; 43:108-109. [DOI: 10.1111/ced.13218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2016] [Indexed: 11/29/2022]
Affiliation(s)
- J. Y. Hong
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - J. M. Kim
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - Y. J. Jang
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - B. J. Kim
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| |
Collapse
|
13
|
Lee JS, Kim JM, Seok J, Kim BJ. Correlation between socio-economic status and atopic dermatitis in Korean adults: the Korea national health and nutrition examination survey (2007-2014). J Eur Acad Dermatol Venereol 2017; 31:1509-1515. [PMID: 28516452 DOI: 10.1111/jdv.14343] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 04/19/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Atopic dermatitis (AD) is one of the most common allergic diseases. Its prevalence has been increasing in recent decades. Socio-economic status is well-known risk factor of allergic diseases. OBJECTIVE This study was performed to investigate the relationship between socio-economic status and AD in Korean adults. METHODS Data were acquired from 47 351 men and women, ≥19 years of age who participated in the Korea National Health and Nutrition Examination Surveys (KNHANES) conducted from 2007 to 2014. The presence of AD was based on self-reported physician diagnosis of AD in the Health Interview Surveys. RESULTS The prevalence of AD was 3.1%, which decreased with increasing age. In univariate analysis, adults with AD were prone to be female, younger, never-married, well educated, lower household members, and urban dwelling (all P < 0.01). Monthly family income and smoking status were not associated with the presence of AD. The prevalence of hypertension, diabetes mellitus and asthma was higher in AD subjects (all P < 0.01), while obesity was not associated with adult AD. After adjusting for confounders, logistic regression analysis showed female sex (adjusted odds ratio [aOR]: 1.483, 95% CI: 1.268-1.734), age (P < 0.01), marital status (Single: aOR: 1.307, 95% CI: 1.012-1.690; Never-married: aOR: 1.938, 95% CI: 1.513-2.482), urban residence (aOR: 1.281, 95% CI: 1.045-1.569) and asthma (aOR: 1.788, 95% CI: 1.416-2.258) were associated with higher prevalence of AD (all P < 0.01). CONCLUSION Female sex, age, marital status, urban residence, and the presence of asthma are important risk factors of the prevalence of AD in Korean adults.
Collapse
Affiliation(s)
- J S Lee
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - J M Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - J Seok
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - B J Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| |
Collapse
|
14
|
Choi S, Seok J, Kwon H, Kwon T, Kim B. Hyaluronic acid injection via a pneumatic microjet device to improve forehead wrinkles. J Eur Acad Dermatol Venereol 2016; 31:e164-e166. [DOI: 10.1111/jdv.13900] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- S.Y. Choi
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
- Department of Dermatology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - H.J. Kwon
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - T.R. Kwon
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - B.J. Kim
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| |
Collapse
|
15
|
Affiliation(s)
- S.Y. Jeong
- Departments of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
- GoodDay Skin & Laser Clinic; Seoul South Korea
| | - K.Y. Park
- Departments of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - J. Seok
- Departments of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - E.J. Ko
- Departments of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| | - T.Y. Kim
- Clinical Research Team; Daewoong Pharmaceutical; Seoul South Korea
| | - B.J. Kim
- Departments of Dermatology; Chung-Ang University College of Medicine; Seoul South Korea
| |
Collapse
|
16
|
Jeong SY, Kwon TR, Seok J, Park KY, Kim BJ. Non-invasive tumescent cryolipolysis using a new 4D handpiece: a comparative study with a porcine model. Skin Res Technol 2016; 23:79-87. [DOI: 10.1111/srt.12305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2016] [Indexed: 01/09/2023]
Affiliation(s)
- S. Y. Jeong
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
- GoodDay Skin & Laser Clinic; Seoul South Korea
| | - T. R. Kwon
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - K. Y. Park
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - B. J. Kim
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| |
Collapse
|
17
|
Park KY, Park MK, Seok J, Li K, Seo SJ. Clinical characteristics of Korean patients with filaggrin-related atopic dermatitis. Clin Exp Dermatol 2016; 41:595-600. [DOI: 10.1111/ced.12854] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2015] [Indexed: 02/03/2023]
Affiliation(s)
- K. Y. Park
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - M. K. Park
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - K. Li
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - S. J. Seo
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| |
Collapse
|
18
|
Seok J, Yeo IK, Park KY, Kim BJ, Seo SJ, Hong CK. Permanent leucoderma after hair transplantation surgery. Clin Exp Dermatol 2016; 41:440-2. [PMID: 26805507 DOI: 10.1111/ced.12799] [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] [Accepted: 07/24/2015] [Indexed: 12/01/2022]
Affiliation(s)
- J Seok
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - I K Yeo
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - K Y Park
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - B J Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - S J Seo
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - C K Hong
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.
| |
Collapse
|
19
|
Li K, Seok J, Park K, Yoon Y, Kim K, Seo S. Copy-number variation of the filaggrin gene in Korean patients with atopic dermatitis: what really matters, ‘number’ or ‘variation’? Br J Dermatol 2016; 174:1098-100. [DOI: 10.1111/bjd.14287] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- K. Li
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - K.Y. Park
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - Y. Yoon
- Department of Microbiology; Chung-Ang University College of Medicine; Seoul Korea
| | - K.H. Kim
- Department of Dermatology; Seoul National University College of Medicine; Seoul Korea
| | - S.J. Seo
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| |
Collapse
|
20
|
Seok J, Hong J, Jang J, Bae J, Choi S, Yoo K, Kim B. The NEEDLELESS MICROJET: a novel device for hypertrophic scar remodelling on the forehead. J Eur Acad Dermatol Venereol 2015; 30:e145-e146. [DOI: 10.1111/jdv.13458] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Seok
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - J.Y. Hong
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - J.H. Jang
- Applicator Research Team; Amore Pacific Corporation Research and Development Center; Yongin Korea
| | - J.H. Bae
- Applicator Research Team; Amore Pacific Corporation Research and Development Center; Yongin Korea
| | - S.Y. Choi
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| | - K.H. Yoo
- Department of Dermatology; Catholic Kwandong University International St. Mary's Hospital; Incheon Korea
| | - B.J. Kim
- Department of Dermatology; Chung-Ang University College of Medicine; Seoul Korea
| |
Collapse
|
21
|
Cho S, Kim S, Kim JH, Zhao J, Seok J, Keum DH, Baik J, Choe DH, Chang KJ, Suenaga K, Kim SW, Lee YH, Yang H. Phase patterning for ohmic homojunction contact in MoTe2. Science 2015; 349:625-8. [DOI: 10.1126/science.aab3175] [Citation(s) in RCA: 729] [Impact Index Per Article: 81.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
22
|
Choi SY, Yoo KH, Oh CT, Kwon TR, Choi EJ, Seok J, Kim BJ. High intensity focused ultrasound as a potential new modality for the treatment of pigmentary skin disorder. Skin Res Technol 2015; 22:131-6. [PMID: 26094501 DOI: 10.1111/srt.12239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND/PURPOSE The clinical skin tightening benefits of high intensity focused ultrasound (HIFU) have been established, but its mechanism of action in pigmented skin disorders remains unknown. We macroscopically and histopathologically investigated dermatological changes after HIFU at different exposure doses in a UVB-induced guinea pig model of hyperpigmentation. METHODS We applied HIFU irradiation at 0.1 and 0.2 J/cm(2) to UVB-induced spotty hyperpigmentation in guinea pig skin. The therapeutic effects of HIFU were judged based on gross appearance using photography, dermoscopy, and chromametry during a period of 3 weeks after HIFU irradiation. Histological assessments were performed using Fontana-Masson staining 1 day before and 3 weeks after HIFU irradiation. RESULTS Macroscopically, UVB-induced hyperpigmentation was significantly reduced 2 weeks after HIFU with 0.2 J/cm(2) , and 3 weeks after HIFU with 0.1 J/cm(2) . Histopathologically, the heavy deposition of melanin in the epidermis induced by UVB exposure was reduced 3 weeks after HIFU irradiation. CONCLUSION We confirmed that HIFU has a positive effect on UVB-induced hyperpigmentation as well as mechanical destructive activity. We suggest that HIFU may be useful as an alternative modality for human patients suffering from skin pigmentary conditions.
Collapse
Affiliation(s)
- S Y Choi
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea
| | - K H Yoo
- Department of Dermatology, Catholic Kwandong University International ST.Mary's Hospital, Incheon, South Korea
| | - C T Oh
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea.,Department of Medicine, Graduate school, Chung-Ang University, Seoul, South Korea
| | - T R Kwon
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea.,Department of Medicine, Graduate school, Chung-Ang University, Seoul, South Korea
| | - E J Choi
- Department of Medicine, Graduate school, Chung-Ang University, Seoul, South Korea
| | - J Seok
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea
| | - B J Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea
| |
Collapse
|
23
|
Seok J, Lee D, Kim K. 23. Correlation of clinical and MRI findings in localizing lesions in Bell’s palsy. Clin Neurophysiol 2008. [DOI: 10.1016/j.clinph.2007.11.073] [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: 10/22/2022]
|
24
|
Chung J, Ye S, Kim J, Kim I, Seok J, Lee J, Suh T. SU-FF-T-368: Radioprotective Effect of the Bolus On Testicular Dose Following Radiation Therapy. Med Phys 2007. [DOI: 10.1118/1.2761093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|