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Yoon SH, Kim H, Lim SM, Kang JM. Nosocomial outbreak of Achromobacter spp. bacteremia due to germicide contamination: a systematic review. Eur Rev Med Pharmacol Sci 2022; 26:6374-6381. [PMID: 36111940 DOI: 10.26355/eurrev_202209_29664] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Achromobacter spp. are aerobic, non-fermentative Gram-negative bacilli that can be widely found in aquatic environments. Nosocomial outbreaks and pseudo-outbreaks of Achromobacter spp. bacteremia have been recognized for decades. Notably, commonly used germicides in hospital settings constitute important sources for these outbreaks. This review aims at summarizing the latest studies and presents the characteristics of nosocomial outbreaks of Achromobacter spp. bacteremia caused by germicide contamination. MATERIALS AND METHODS A systematic search of the PubMed and EMBASE databases was conducted for articles published in English between January 1, 2000, and June 10, 2022. RESULTS Overall, 170 articles were retrieved, and 7 studies were finally included in the systematic review. Whether true or pseudo-bacteremia, positive blood culture results were most commonly reported in immunosuppressed patients or those with indwelling catheters. The most commonly reported contaminated germicide was chlorhexidine solution used as both an antiseptic and disinfectant. Atomizers, dispensers, and various product containers were identified as reservoirs. The prognoses of the affected patients were generally favorable. CONCLUSIONS Awareness about the high survival ability of Achromobacter spp. in germicides and the possible hospital reservoirs of these microbes will help to improve infection control and prevent nosocomial outbreaks or pseudo-outbreaks caused by Achromobacter spp.
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Affiliation(s)
- S H Yoon
- Department of Pediatrics, Severance Children's Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Choi M, Moon S, Eom HJ, Lim SM, Kim YH, Nam S. High Expression of PRNP Predicts Poor Prognosis in Korean Patients with Gastric Cancer. Cancers (Basel) 2022; 14:cancers14133173. [PMID: 35804944 PMCID: PMC9264980 DOI: 10.3390/cancers14133173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/19/2022] [Accepted: 06/27/2022] [Indexed: 11/16/2022] Open
Abstract
Gastric cancer (GC) has the highest occurrence and fourth-highest mortality rate of all cancers in Korea. Although survival rates are improving with the development of diagnosis and treatment methods, the five-year survival rate for stage 4 GC in Korea remains <10%. Therefore, it is important to identify candidate prognostic factors for predicting poor prognosis. PRNP is a gene encoding the prion protein PrP, which has been noted for its role in the nervous system and is known to be upregulated in various cancers and associated with both cell proliferation and metastasis. However, the value of PRNP as a prognostic factor for Korean GC patients remains unclear. Here, we analyzed the relationship between PRNP expression and survival in three independent datasets for Korean patients with GC as well as the TCGA-STAD dataset. Survival analysis indicates that high levels of PRNP expression are associated with poor overall survival of patients with GC. Gene set enrichment analysis showed that PRNP is associated with epithelial mesenchymal transition and Hedgehog signaling. In addition, proliferation of GC cell lines was inhibited after siRNA-mediated knockdown of PRNP. In conclusion, our study suggests a potential role for PRNP as a candidate prognostic factor for patients with GC.
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Affiliation(s)
- Minseok Choi
- College of Medicine, Gachon University, Incheon 21565, Korea;
| | - SeongRyeol Moon
- Department of Health Sciences and Technology, Gachon Advanced Institute for Health Sciences and Technology (GAIHST), Gachon University, Incheon 21999, Korea;
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon 21565, Korea
| | - Hyo Jin Eom
- Research and Development Department, Corestem Inc., Seongnam 13486, Korea;
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, Seongnam 13486, Korea;
| | | | - Seungyoon Nam
- Department of Health Sciences and Technology, Gachon Advanced Institute for Health Sciences and Technology (GAIHST), Gachon University, Incheon 21999, Korea;
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon 21565, Korea
- Correspondence: ; Tel.: +82-32-458-2737; Fax: +82-32-458-2875
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Correction: Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2021; 26:7853. [PMID: 34305137 DOI: 10.1038/s41380-021-01185-z] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Division of Functional Food Research, Korea Food Research Institute, Seongnam, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S- Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y- E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B- E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea. .,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea. .,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea.
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea. .,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea. .,KU-KIST Graduate School of Converging Science and Technology, Korea University,145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Kuan JW, Chang KM, Phan CL, Wong SP, Lim SM, Toh SG, Loh WK. Fluctuation of BCR-ABL1 qPCR IS level beyond 0.1% IS after stopping tyrosine kinase inhibitor in chronic myeloid leukaemia patients with deep molecular response for at least two years. Med J Malaysia 2021; 76:414-416. [PMID: 34031342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Fluctuation of BCR-ABL1 real-time quantitative polymerase chain reaction in International Scale (qPCRIS) level below major molecular response (MMR) (0.1%IS) is a known phenomenon after stopping tyrosine kinase inhibitor (TKI) in chronic myeloid leukaemia (CML) patients who are attempting treatment free remission (TFR). We report here four cases of fluctuation beyond MMR during conduct of a Malaysia Stop TKI Trial (MSIT) to examine the validity of the commonly used relapse criterion - loss of MMR for one reading - aiming to provide evidence in setting relapse criteria for future CML patients who want to attempt TFR.
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Affiliation(s)
- J W Kuan
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia.
| | - K M Chang
- Ampang Hospital, Department of Haematology, Ampang, Malaysia
| | - C L Phan
- Ampang Hospital, Department of Haematology, Ampang, Malaysia
| | - S P Wong
- Ampang Hospital, Department of Pharmacy, Ampang, Malaysia
| | - S M Lim
- Sultanah Aminah Hospital, Department of Medicine, Johor Bahru, Malaysia
| | - S G Toh
- Sultanah Aminah Hospital, Department of Medicine, Johor Bahru, Malaysia
| | - W K Loh
- Ampang Hospital, Department of Haematology, Ampang, Malaysia
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Lee SS, Choi JH, Lim SM, Kim GJ, Lee SK, Jeon YK. Alteration of Pituitary Tumor Transforming Gene 1 by MicroRNA-186 and 655 Regulates Invasion Ability of Human Oral Squamous Cell Carcinoma. Int J Mol Sci 2021; 22:ijms22031021. [PMID: 33498448 PMCID: PMC7864193 DOI: 10.3390/ijms22031021] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/11/2021] [Accepted: 01/18/2021] [Indexed: 12/18/2022] Open
Abstract
Background: Pituitary tumor-transforming gene 1 (PTTG1) was recently shown to be involved in the progression as well as the metastasis of cancers. However, their expression and function in the invasion of oral squamous cell carcinoma (SCC) remain unclear. Methods: The expressions of PTTG1 and PTTG1-targeted miRNA in oral SCC cell lines and their invasion capability depended on PTTG1 expression were analyzed by quantitative RT-PCR, Western blots, the transwell insert system and Zymography. Results: Invasion abilities were decreased in oral SCC cells treated with siRNA-PTTG1. When PTTG1 were downregulated in oral SCC cells treated with microRNA-186 and -655 inhibited their invasion abilities via MMP-9 activity. Conclusions: These results indicate that alteration of expression of PTTG1 in oral SCC cells by newly identified microRNA-186 and -655 can regulate invasion activity. Therefore, these data offer new insights into further understanding PTTG1 function in oral SCC and should provide new strategies for diagnostic markers for oral SCC.
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Affiliation(s)
- Sang Shin Lee
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Korea; (J.H.C.); (S.K.L.)
- Correspondence: (S.S.L.); (Y.K.J.)
| | - Jong Ho Choi
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Korea; (J.H.C.); (S.K.L.)
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, Seoul 13488, Korea; (S.M.L.); (G.J.K.)
| | - Gi Jin Kim
- Department of Biomedical Science, CHA University, Seoul 13488, Korea; (S.M.L.); (G.J.K.)
| | - Suk Keun Lee
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Korea; (J.H.C.); (S.K.L.)
| | - Yoon Kyung Jeon
- Department of Pathology, Seoul National University College of Medicine, Seoul 03080, Korea
- Correspondence: (S.S.L.); (Y.K.J.)
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Lim SM, Tan M, Sze YL, Au L. Letter to the Editor: Effects of the COVID-19 Pandemic on COVID-19 Negative Geriatric Patients with Hip Fractures. J Frailty Aging 2020; 10:75-76. [PMID: 33331628 PMCID: PMC7548523 DOI: 10.14283/jfa.2020.54] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Since December 2019, the novel coronavirus (COVID-19) had affected millions globally, particularly putting elderly and persons with chronic diseases at risk (1). 95% of all COVID-19 deaths in Singapore are older adults (2). As public health policymakers try to control the pandemic by focusing resources on COVID-19, the general population fear contracting coronavirus from hospitals, resulting in changes in their healthcare seeking behaviour. We describe two cases demonstrating the direct and indirect impact of COVID-19 to our geriatric patients in Singapore who have sustained hip fractures.
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Affiliation(s)
- S M Lim
- Dr Seok Mei Lim, Division of Geriatric Medicine, Ng Teng Fong General Hospital, 1 Jurong East Street 21, Singapore 609606, Email address: , Tel: +65 6716 2000, Fax: +65 6716 5500
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Choi JH, Seok J, Lim SM, Kim TH, Kim GJ. Microenvironmental changes induced by placenta-derived mesenchymal stem cells restore ovarian function in ovariectomized rats via activation of the PI3K-FOXO3 pathway. Stem Cell Res Ther 2020; 11:486. [PMID: 33198818 PMCID: PMC7667861 DOI: 10.1186/s13287-020-02002-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 10/29/2020] [Indexed: 12/23/2022] Open
Abstract
Background Translational studies have explored the therapeutic potential and feasibility of mesenchymal stem cells (MSCs) in several degenerative diseases; however, mechanistic studies of the function of these cells have been insufficient. As ovarian failure causes anovulation as well as ovarian steroid hormonal imbalances, the specific aims of this study were to analyze the therapeutic role of placenta-derived MSCs (PD-MSCs) in an ovarian failure ovariectomy (OVX) rat model and evaluate whether PD-MSC transplantation (Tx) improved folliculogenesis and oocyte maturation in the injured ovary through PI3K/Akt and FOXO signaling. Methods Blood and ovary tissue were collected and analyzed after various PD-MSC Tx treatments in an ovariectomized rat model. Changes in the expression of folliculogenesis- and ovary regeneration-related genes induced by PD-MSC treatments were analyzed by qRT-PCR, Western blotting, and histological analysis. Results The levels of hormones related to ovary function were significantly increased in the PD-MSC Tx groups compared with those in the nontransplantation group (NTx). The follicle numbers in the ovarian tissues were increased along with the increased expression of genes related to folliculogenesis in the PD-MSC Tx groups compared with the NTx groups. Furthermore, Tx PD-MSCs induced follicle maturation by increasing the phosphorylation of GSK3 beta and FOXO3 (p < 0.05) and shifting the balance of growth and apoptosis in oocytes. Conclusions Taken together, these results show that PD-MSC Tx can restore ovarian function and induce ovarian folliculogenesis via the PI3K/Akt and FOXO signaling pathway.
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Affiliation(s)
- Jong Ho Choi
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung-si, 25457, Republic of Korea
| | - Jin Seok
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Tae Hee Kim
- Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine Hospital, Asan, 14584, Gyoenggi-do, Republic of Korea
| | - Gi Jin Kim
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea.
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Affiliation(s)
- Y L Boo
- Department of Haematology, Hospital Sultanah Aminah, Johor Bahru, Malaysia
| | - C C K Liam
- Department of Haematology, Hospital Ampang, Selangor, Malaysia
| | - S G Toh
- Department of Haematology, Hospital Sultanah Aminah, Johor Bahru, Malaysia
| | - S M Lim
- Department of Haematology, Hospital Sultanah Aminah, Johor Bahru, Malaysia
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Abstract
BACKGROUND Needlestick injuries (NSIs) are common healthcare-related injuries and possible consequences include blood-borne infections. Despite that, a large proportion of NSIs are not reported. AIMS To estimate the prevalence of under-reporting of NSIs and to evaluate the knowledge, attitude and behaviour towards NSIs among junior doctors in a tertiary hospital in Singapore. METHODS An explanatory sequential mixed-methods design was employed. Quantitative data were collected through questionnaires completed by 99 junior doctors. Descriptive statistics and bivariate analysis were performed to evaluate socio-demographic characteristics, NSI history and NSI reporting practices. Qualitative data were collected through 12 in-depth interviews. Participants were purposively recruited, and semi-structured topic guides were developed. Data were analysed using a thematic approach. RESULTS Fifty-two per cent of respondents had history of NSI. Of those with history of NSI, 31% did not report injury. NSI reporters were 1.52 times as likely to be aware of how to report injury (P < 0.05), and 1.63 times as likely to feel that reporting benefits their health (P < 0.01) compared with non-reporters. NSI reporters were 83% more likely to report a clean NSI (P = 0.05). For non-reporters, the main reasons for not reporting were perceived low risk of transmission (41%) and lack of time to report (35%). Themes identified in the qualitative data include perceived benefits, perceived barriers, perceived threats, cues to action and organizational culture. CONCLUSION Under-reporting of NSIs may have significant implications for patients and healthcare workers. Addressing identified factors and instituting targeted interventions will help to improve reporting rates.
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Affiliation(s)
- M W Ong
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - J Hwang
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - S M Lim
- Occupational Health Clinic, National University Health Systems, Singapore, Singapore
| | - J Sng
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
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Jang HY, Lim SM, Lee HJ, Hong JS, Kim GJ. Identification of microRNAs and their target genes in the placenta as biomarkers of inflammation. Clin Exp Reprod Med 2020; 47:42-53. [PMID: 32146774 PMCID: PMC7127901 DOI: 10.5653/cerm.2019.03013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/18/2019] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE Recently, microRNA (miRNA) has been identified both as a powerful regulator involved in various biological processes through the regulation of numerous genes and as an effective biomarker for the prediction and diagnosis of various disease states. The objective of this study was to identify and validate miRNAs and their target genes involved in inflammation in placental tissue. METHODS Microarrays were utilized to obtain miRNA and gene expression profiles from placentas with or without inflammation obtained from nine normal pregnant women and 10 preterm labor patients. Quantitative real-time polymerase chain reaction and Western blots were performed to validate the miRNAs and differentially-expressed genes in the placentas with inflammation. Correlations between miRNA and target gene expression were confirmed by luciferase assays in HTR-8/SVneo cells. RESULTS We identified and validated miRNAs and their target genes that were differentially expressed in placentas with inflammation. We also demonstrated that several miRNAs (miR-371a-5p, miR-3065-3p, miR-519b-3p, and miR-373-3p) directly targeted their target genes (LEF1, LOX, ITGB4, and CD44). However, some miRNAs and their direct target genes showed no correlation in tissue samples. Interestingly, miR-373-3p and miR-3065-3p were markedly regulated by lipopolysaccharide (LPS) treatment, although the expression of their direct targets CD44 and LOX was not altered by LPS treatment. CONCLUSION These results provide candidate miRNAs and their target genes that could be used as placental biomarkers of inflammation. These candidates may be useful for further miRNA-based biomarker development.
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Affiliation(s)
- Hee Yeon Jang
- Department of Biomedical Science, CHA University, Seongnam, Korea
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, Seongnam, Korea
| | - Hyun Jung Lee
- Non-Clinical Evaluation Center, CHA Advanced Research Institute, Seongnam, Korea
| | - Joon-Seok Hong
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Gi Jin Kim
- Department of Biomedical Science, CHA University, Seongnam, Korea
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Kim TH, Choi JH, Jun Y, Lim SM, Park S, Paek JY, Lee SH, Hwang JY, Kim GJ. 3D-cultured human placenta-derived mesenchymal stem cell spheroids enhance ovary function by inducing folliculogenesis. Sci Rep 2018; 8:15313. [PMID: 30333505 PMCID: PMC6193033 DOI: 10.1038/s41598-018-33575-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 03/06/2017] [Accepted: 09/18/2018] [Indexed: 12/18/2022] Open
Abstract
Placenta-derived mesenchymal stem cells (PD-MSCs) have numerous advantages over other adult MSCs that make them an attractive cell source for regenerative medicine. Here, we demonstrate the therapeutic effect of PD-MSCs in ovariectomized (Ovx) rats and compare their efficacy when generated via a conventional monolayer culture system (2D, naïve) and a spheroid culture system (3D, spheroid). PD-MSC transplantation significantly increased the estradiol level in Ovx rats compared with the non-transplantation (NTx) group. In particular, the estradiol level in the Spheroid group was significantly higher than that in the Naïve group at 2 weeks. Spheroid PD-MSCs exhibited a significantly higher efficiency of engraftment onto ovarian tissues at 2 weeks. The mRNA and protein expression levels of Nanos3, Nobox, and Lhx8 were also significantly increased in the Spheroid group compared with those in the NTx group at 1 and 2 weeks. These results suggest that PD-MSC transplantation can restore ovarian function in Ovx rats by increasing estrogen production and enhancing folliculogenesis-related gene expression levels and further indicate that spheroid-cultured PD-MSCs have enhanced therapeutic potential via increased engraftment efficiency. These findings improve our understanding of stem-cell-based therapies for reproductive systems and may suggest new avenues for developing efficient therapies using 3D cultivation systems.
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Affiliation(s)
- Tae-Hee Kim
- Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon-si, Gyunggi-do, Republic of Korea
| | - Jong Ho Choi
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, Gyunggi-do, Republic of Korea
| | - Yesl Jun
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Republic of Korea
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, Gyunggi-do, Republic of Korea
| | - Sohae Park
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, Gyunggi-do, Republic of Korea
| | - Jin-Young Paek
- Department of Clinical Pathology, CHA Gangnam Medical Center, CHA University, School of Medicine, 566 Nonhyun-ro, Gangnam-gu, Seoul, Republic of Korea
| | - Sang-Hoon Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Republic of Korea.,Department of Biomedical Engineering, College of Health Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Republic of Korea
| | - Ji-Young Hwang
- Department of Biomedical Engineering, College of Health Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Republic of Korea.
| | - Gi Jin Kim
- Department of Biomedical Science, CHA University, 689, Sampyeong-dong, Bundang-gu, Seongnam-si, Gyunggi-do, Republic of Korea.
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Jang YW, Jo Y, Cho WK, Choi H, Yoon YN, Lim SM, Lee YH, Bae JY, Lee BC. First Report of Bean Common Mosaic Necrosis Virus Infecting Soybean in Korea. Plant Dis 2018; 102:PDIS09171474PDN. [PMID: 30113257 DOI: 10.1094/pdis-09-17-1474-pdn] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Y W Jang
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50426, Korea
| | - Y Jo
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - W K Cho
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - H Choi
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Korea
| | - Y N Yoon
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50426, Korea
| | - S M Lim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50426, Korea
| | - Y H Lee
- Planning and Coordination Division, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
| | - J Y Bae
- Crop Foundation Division, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
| | - B C Lee
- Crop Foundation Division, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
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13
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Woo J, Kim JE, Im JJ, Lee J, Jeong HS, Park S, Jung SY, An H, Yoon S, Lim SM, Lee S, Ma J, Shin EY, Han YE, Kim B, Lee EH, Feng L, Chun H, Yoon BE, Kang I, Dager SR, Lyoo IK, Lee CJ. Astrocytic water channel aquaporin-4 modulates brain plasticity in both mice and humans: a potential gliogenetic mechanism underlying language-associated learning. Mol Psychiatry 2018; 23:1021-1030. [PMID: 29565042 DOI: 10.1038/mp.2017.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 03/21/2017] [Accepted: 04/17/2017] [Indexed: 01/04/2023]
Abstract
The role of astrocytes in brain plasticity has not been extensively studied compared with that of neurons. Here we adopted integrative translational and reverse-translational approaches to explore the role of an astrocyte-specific major water channel in the brain, aquaporin-4 (AQP4), in brain plasticity and learning. We initially identified the most prevalent genetic variant of AQP4 (single nucleotide polymorphism of rs162008 with C or T variation, which has a minor allele frequency of 0.21) from a human database (n=60 706) and examined its functionality in modulating the expression level of AQP4 in an in vitro luciferase reporter assay. In the following experiments, AQP4 knock-down in mice not only impaired hippocampal volumetric plasticity after exposure to enriched environment but also caused loss of long-term potentiation after theta-burst stimulation. In humans, there was a cross-sectional association of rs162008 with gray matter (GM) volume variation in cortices, including the vicinity of the Perisylvian heteromodal language area (Sample 1, n=650). GM volume variation in these brain regions was positively associated with the semantic verbal fluency. In a prospective follow-up study (Sample 2, n=45), the effects of an intensive 5-week foreign language (English) learning experience on regional GM volume increase were modulated by this AQP4 variant, which was also associated with verbal learning capacity change. We then delineated in mice mechanisms that included AQP4-dependent transient astrocytic volume changes and astrocytic structural elaboration. We believe our study provides the first integrative evidence for a gliogenetic basis that involves AQP4, underlying language-associated brain plasticity.
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Affiliation(s)
- J Woo
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - J E Kim
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - J J Im
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H S Jeong
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Park
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - S-Y Jung
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - H An
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S M Lim
- Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S Lee
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - J Ma
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E Y Shin
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - Y-E Han
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea
| | - B Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Interdisciplinary Program in Neuroscience, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - E H Lee
- Green Cross Laboratories, Yongin, Republic of Korea
| | - L Feng
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - H Chun
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - B-E Yoon
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Department of Nanobiomedical Science, Dankook University, Cheonan, Republic of Korea
| | - I Kang
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea
| | - S R Dager
- Department of Radiology, University of Washington, Seattle, WA, USA.,Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - I K Lyoo
- Department of Brain and Cognitive Sciences, Scranton College, Ewha Womans University, Seoul, Republic of Korea.,Ewha Brain Institute, Ewha Womans University, Seoul, Republic of Korea.,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea
| | - C J Lee
- Center for Neural Science and Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.,Neuroscience Program, University of Science and Technology (UST), Daejeon, Republic of Korea.,KU-KIST, Graduate School of Convergence Technology, Korea University, Seoul, Republic of Korea
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14
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Sohn J, Lim SM, Kim E, Kim S, Koo JS, Kim SI, Park S, Park HS, Kwon NJ, Kim GM, Kim S. Abstract P2-05-07: Whole exome sequencing of extreme responders reveals low mutation burden in metastatic breast cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p2-05-07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Extreme responders to anticancer therapy are rarely encountered in the treatment of advanced breast cancer patients, but their treatment response have not been investigated on the whole exome level. We performed whole exome analysis to characterize genomic landscape of extreme responders in metastatic breast cancer patients.
Methods: Clinical samples were obtained from patients who showed exceptional response to anti-HER2 therapy or hormonal therapy. Non-responders were selected among those who did not respond. Matched breast tumor tissue (somatic DNA) and blood samples (germline DNA) were collected from a total of 18 responders (12 ER+, 6 HER2+) and 8 non-responders (6 ER+, 1 HER2+, 1 TNBC). Whole exome sequencing using Illumina HiSeq2500 was performed on the 26 patients (52 samples). Somatic single nucleotide variants (SNVs), indels and copy number variants (CNVs) were identified for each patient genome. Group specific somatic variants and mutation burden were statistically analyzed.
Findings: Cancer exomes were characterized by 1,455 somatic single-nucleotide variants (1,327 missense, 80 nonsense, 36 splice-site, 12 start/stop-lost), 149 insertions/deletions (108 frameshift, 41 inframe), with a median of 1 mutations per Mb (0.2 to 2.7 mutations per Mb) in all patients. Responders harbored a significantly lower non-synonymous mutation burden than non-responders (median, 27 vs. 90.5, P=0.01), and copy number variation burden was also lower (median 23 vs. 31, P=0.14). Multivariate analyses of factors influencing progression-free survival showed that high mutation burden and visceral metastases were significantly related with progression.
Interpretation: Extreme responders of metastatic breast cancer are characterized by low nonsynonymous mutational burden.
Citation Format: Sohn J, Lim SM, Kim E, Kim S, Koo JS, Kim SI, Park S, Park HS, Kwon N-J, Kim GM, Kim S. Whole exome sequencing of extreme responders reveals low mutation burden in metastatic breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P2-05-07.
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Affiliation(s)
- J Sohn
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - SM Lim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - E Kim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - S Kim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - JS Koo
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - SI Kim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - S Park
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - HS Park
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - N-J Kwon
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - GM Kim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
| | - S Kim
- Yonsei University College of Medicine; CHA Bundang Medical Center; Macrogen
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15
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Yoon KH, Park HS, Kim JH, Kim JY, Lim SM, Kim SI, Cho YU. Abstract OT2-01-03: A prospective randomized study comparing surgery using electrosurgical bipolar sealing devices and surgery using conventional electro-cautery. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-ot2-01-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Seroma and lymphorrhea are the most common complication following mastectomy and/or axillary lymph node dissection (ALND). The manifestation of seroma accelerates complications such as post-operative bleeding, wound infection, prolonged recovery period. Sealing blood vessels and lymph drainages adequately during mastectomy and/or ALND may play a main role in reducing complication. Therefore, adequate sealing vessels and lymphatics during the surgery is important to reduce seroma and lymphorrhea related complications in patients with breast cancer. Objective: This study aims to show that electrosurgical bipolar sealing device for mastectomy could provide clinical benefit in reducing seroma formation. Design: ELBCE (ELectrosurgical Bipolar Devices VS Convention Electronicautery, NCT03166384)is a prospective, randomized, two-arm assignment controlled trial of application of electrosurgical bipolar sealing device for mastectomy in patients with breast cancer. Patients is randomized in 1:1 ratio to conventional suture and tie group or electrosurgical bipolar sealing devices group. Randomization is performed using opening sealed envelope before enrollment. The primary end point is to compare the total drainage volume until drain tube removal. The time to drain removal is also measured. The secondary end points is the total amount of aspiration from seroma after drain tube removal, and the frequency of seroma aspiration. Statistical consideration: A sample size 44 subjects per each arm was planned to provide a 90% power to detect a 25% decrease of the total amount of drainage fluid after surgery by using an electrosurgical bipolar sealing device when compared to a conventional suture and tie technique. In our experience, the average total volume of fluid after conventional suture and tie technique is 220 mL, with a standard deviation of 80. Eligibility criteria:Inclusion criteria are patients older than 20 years and those who planned to undergo total mastectomy and/or ALND. Exclusion criteria are bilateral breast cancer patients, male patients, patients who underwent ipsilateral axillar surgery or radiation therapy, recurrent breast cancer patients, patients without drain catheter, and patients with ductal carcinoma in situ who have not undergone ipsilateral sentinel lymph node biopsy or ALND.Present accrual and target accrual:ELSEBA study has an accrual target of 88 patients. To date, 8 patients have been randomized. Contact information:Dr. Hyung Seek Park, E-mail: hyungseokpark.md@gmail.com; imgenius@yuhs.ac, Telephone: +82-2-2228-2100
Citation Format: Yoon KH, Park HS, Kim JH, Kim JY, Lim SM, Kim SI, Cho YU. A prospective randomized study comparing surgery using electrosurgical bipolar sealing devices and surgery using conventional electro-cautery [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr OT2-01-03.
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Affiliation(s)
- KH Yoon
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - HS Park
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - JH Kim
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - JY Kim
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - SM Lim
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - SI Kim
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - YU Cho
- Yonsei University College of Medicine, Seoul, Republic of Korea
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16
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Kim JH, Park HS, Lim SM, Yoon KH, Kim JY, Park S, Kim SI, Cho YU. Abstract P6-11-13: Not presented. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p6-11-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was not presented at the symposium.
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Affiliation(s)
- JH Kim
- Yonsei University College of Medicine, Seoul, Korea
| | - HS Park
- Yonsei University College of Medicine, Seoul, Korea
| | - SM Lim
- Yonsei University College of Medicine, Seoul, Korea
| | - KH Yoon
- Yonsei University College of Medicine, Seoul, Korea
| | - JY Kim
- Yonsei University College of Medicine, Seoul, Korea
| | - S Park
- Yonsei University College of Medicine, Seoul, Korea
| | - SI Kim
- Yonsei University College of Medicine, Seoul, Korea
| | - YU Cho
- Yonsei University College of Medicine, Seoul, Korea
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17
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Zahari Sham SY, C Thambiah S, Samsudin IN, Lim SM. Light chain multiple myeloma: an evaluation of its biochemical investigations. Malays J Pathol 2017; 39:311-315. [PMID: 29279596] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Multiple myeloma is a type of plasma cell dyscrasia, characterised by presence of paraprotein or monoclonal (M)-protein in serum or urine. The M-protein may consist of an intact immunoglobulin, the heavy chain only or the light chain only. The latter, designated as light chain multiple myeloma (LCMM) makes up almost 20% of myelomas. Clinical manifestation is often heralded by hypercalcaemia, renal impairment, normocytic normochromic anaemia and bone lesions, reflecting end-organ damage, collectively known as the acronym CRAB. In particular, free light chain nephrotoxicity accounts for the high prevalence of renal impairment seen in LCMM. This case illustrates a typical presentation of LCMM with focal discussion on its initial and diagnostic, as well as prognostic biochemical investigations.
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Affiliation(s)
- S Y Zahari Sham
- Universiti Putra Malaysia, Faculty of Medicine and Health Sciences, Department of Pathology, 43400, Serdang, Selangor, Malaysia.
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18
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Abstract
The brachial artery is rarely injured in closed posterior dislocation of the elbow, unlike the high rate of vascular injury seen after dislocation of the knee. Despite the anatomical proximity of the brachial artery to the elbow joint, most cases of brachial artery injury after dislocation of the elbow are related to an associated fracture, an open injury or high-energy trauma. A high index of suspicion should be maintained as well as a thorough neurovascular examination with regards this potentially disastrous complication. We describe an unusual case of complete thrombosis of the brachial artery presenting with a posterior elbow dislocation following a fall (low energy trauma) that was treated nonoperatively. At three months follow-up, patient had good circulation over the affected limb, no complaints of ischemic pain or cold intolerance, no signs of Volkmann’s ischemic contracture, and a range of motion that was comparable to the contralateral limb.
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Affiliation(s)
- S M Lim
- Department of Orthopaedics, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - G G Chua
- Department of Orthopaedics, Hospital Tuanku Fauziah, Kangar, Malaysia
| | - F Asrul
- Department of Orthopaedics, Hospital Tuanku Fauziah, Kangar, Malaysia
| | - M Yazid
- Department of Orthopaedics, Hospital Tuanku Fauziah, Kangar, Malaysia
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19
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Lim SM, Thambiah SC, Zahari Sham SY, Omar R, Hambali Z, Samsudin IN. Determination of the 99th percentile upper reference limit for high-sensitivity cardiac troponin I in Malaysian population. Malays J Pathol 2017; 39:135-140. [PMID: 28866694] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Introduction of high-sensitivity cardiac troponin I (hscTn I) assays for routine clinical use in Malaysia requires determination of the 99th percentile upper reference limit (URL) for each assay to suit local context. Hence, this study aimed to determine the 99th percentile URL for hscTn I in the Malaysian population. A total of 250 (120 males and 130 females) healthy Malaysian blood donors aged 18 to 60 years old were recruited. Blood samples for hscTn I were measured using Abbott Diagnostics hscTn I assay on Architect i2000sr analyser. The 99th percentile was calculated using a non-parametric method and gender specific results were compared. The 99th percentile URL for hscTn I for the overall population was 23.7 ng/L, with gender specific values being 29.9 ng/L and 18.6 ng/L for male and female, respectively. Females had significantly lower hscTn I compared to males. This study confirms the use of gender specific 99th percentile URL for hscTn I for clinical use in a multi-ethnic Malaysian population.
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Affiliation(s)
- S M Lim
- Universiti Putra Malaysia, Faculty of Medicine and Health Sciences, Department of Pathology, Malaysia.
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20
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Lim SM, Geervliet M, Verhagen JH, Müskens GJDM, Majoor FA, Osterhaus ADME, Martina BEE. Serologic evidence of West Nile virus and Usutu virus infections in Eurasian coots in the Netherlands. Zoonoses Public Health 2017; 65:96-102. [PMID: 28688117 DOI: 10.1111/zph.12375] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 02/17/2017] [Indexed: 11/29/2022]
Abstract
West Nile virus (WNV) and Usutu virus (USUV) are arboviruses that are maintained in enzootic transmission cycles between mosquitoes and birds and are occasionally transmitted to mammals. As arboviruses are currently expanding their geographic range and emerging in often unpredictable locations, surveillance is considered an important element of preparedness. To determine whether sera collected from resident and migratory birds in the Netherlands as part of avian influenza surveillance would also represent an effective source for proactive arbovirus surveillance, a random selection of such sera was screened for WNV antibodies using a commercial ELISA. In addition, sera of jackdaws and carrion crows captured for previous experimental infection studies were added to the selection. Of the 265 screened serum samples, 27 were found to be WNV-antibody-positive, and subsequent cross-neutralization experiments using WNV and USUV confirmed that five serum samples were positive for only WNV-neutralizing antibodies and seven for only USUV. The positive birds consisted of four Eurasian coots (Fulica atra) and one carrion crow (Corvus corone) for WNV, of which the latter may suggest local presence of the virus, and only Eurasian coots for USUV. As a result, the screening of a small selection of serum samples originally collected for avian influenza surveillance demonstrated a seroprevalence of 1.6% for WNV and 2.8% for USUV, suggesting that this sustained infrastructure could serve as a useful source for future surveillance of arboviruses such as WNV and USUV in the Netherlands.
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Affiliation(s)
- S M Lim
- Artemis One Health Research Foundation, Delft, the Netherlands
| | - M Geervliet
- Artemis One Health Research Foundation, Delft, the Netherlands.,Animal Sciences, Cell Biology and Immunology, Wageningen University, Wageningen, The Netherlands
| | - J H Verhagen
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands.,Centre for Ecology and Evolution for Microbial Model Systems Zoonotic Ecology and Epidemiology, Department of Biology and Environmental Science, Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden
| | - G J D M Müskens
- Wageningen Environmental Research (Alterra), Wageningen, The Netherlands
| | - F A Majoor
- Sovon Dutch Centre for Field Ornithology, Nijmegen, The Netherlands
| | - A D M E Osterhaus
- Artemis One Health Research Foundation, Delft, the Netherlands.,Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
| | - B E E Martina
- Artemis One Health Research Foundation, Delft, the Netherlands.,Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
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21
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Park S, Lee JS, Kim JH, Lim SM, Park HS, Kim SI. Abstract P5-16-25: Serum 25-hydroxyvitamin D levels and oncologic outcomes of breast cancer patients receiving neoadjuvant chemotherapy. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p5-16-25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:According to prior studies, the role of serum vitamin D3 has been inconsistentand clinical implications of 25-hyrdoxyvitamin D (25-OHD) have been little studiedin breast cancer patients receiving neoadjuvant chemotherapy (NCT).
Objectives: The aims of study were to investigate changes in 25-OHD levels before and after NCT and to determine the association of 25-OHD and oncologic outcomes including pathological complete response (pCR) in breast cancer patients.
Patients and Materials: From January 2010 to December 2013, serum 25-OHD levels at pre- and post-NCT were measured in 377 breast cancer patients. The association of serum 25-OHD levels with clinicopathological data including breast cancer subtypes, pCR and survival were retrospectively analysed. Delta 25-OHD was calculated as serum 25-OHDlevels before minus after NCT.
Results: Mean ageof study population was 48.7 yearsand mean follow-up periods were 35.9months.Mean baseline serum 25-OHD concentration was 14.60 ng/mL (standard deviation, 7.44) and more than 80% of patients showed insufficient 25-OHD levels. The mean 25-OHDat post-NCT was 12.16 ng/mL (standard deviation, 6.87).There was a significant decrease in serum 25-OHD after NACT (p<0.001).The pCR rates were 25.7% among study cohort.However, 25-OHD levels at baseline and post-NCT were not related to pCR and survival outcomes. No associations were found between pCR and delta 25-OHD. According to stratification by breast cancer subtypes, however, patients with ≥ -2.67 (median value) of delta 25-OHD revealed a trend of higher achievement of pCR and better survival in luminal A subtype. No associations were found among the other subtypes.
Conclusions: Many Korean breast cancer patients showed insufficient serum 25-OHD levels at diagnosis of malignancy and a significant decrease in serum vitamin D3 after NACT was observed.No significant association of 25-OHD 3 with pCR and survival was found. Therefore, correction or maintenance of appropriate serum 25-OHD levels should be focused for bone health as comprehensive management of breast cancer during NCT.In addition, possible oncological aspects of 25-OHD should further researched individually considering breast subtypes.
Citation Format: Park S, Lee JS, Kim JH, Lim SM, Park HS, Kim SI. Serum 25-hydroxyvitamin D levels and oncologic outcomes of breast cancer patients receiving neoadjuvant chemotherapy [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P5-16-25.
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Affiliation(s)
- S Park
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - JS Lee
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - JH Kim
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - SM Lim
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - HS Park
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
| | - SI Kim
- Yonsei University College of Medicine, Seoul, Republic of Korea; Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea
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22
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Kim JH, Lim SM, Kim SI, Park SH, Park HS, Kim JY. Abstract OT2-04-01: Study on the usefulness of the skin wound therapeutic agent 'Neo dermal activator' in breast cancer surgery. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-ot2-04-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background : Wound infection after breast cancer surgery is considered to be factors that increase the discomfort of the patient and increase of the extension and the use of antibiotics in the treatment time period, in particular breast cancer postoperative wound infection resulting slow the implementation of adjunctive therapy such as radiation therapy or chemotherapy after surgery can cause, it is important to effectively prevent, there has been a development of a variety of skin wound therapeutic agent to reduce them. The purpose of this study was to evaluate the effects of the wound dressing with existing wound dressing Neo dermal activator compared to the patients receiving preoperative chemotherapy.
Methods : A total of 54 breast cancer patients who recieved BCS & mastectomy devided two group(each 27 patients) through the random assignment between Jan, 2016 and June, 2016. Day one weeks after surgery to examine the wound infection rate (surgical site infection, SSI rate). After six months of outpatient surgery visits to check the wounds of patients, using the VAS records the scar of the wound satisfaction. For patients who underwent radiation therapy, check out the time it took to begin radiation therapy after surgery.
All tests were two-sided. All statistical analyses were performed using SPSS version 20.0 (SPSS Inc., Chicago, Illinois, USA).
Eligbility criteria is :
- one side breast cancer
- not inflammatory breast cancer
- recieved BCS and mastectomy only (without immediate reconstruction surgery)
- stage IV breast cancer.
Citation Format: Kim JH, Lim SM, Kim SI, Park SH, Park HS, Kim JY. Study on the usefulness of the skin wound therapeutic agent 'Neo dermal activator' in breast cancer surgery [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr OT2-04-01.
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Affiliation(s)
- JH Kim
- Yonsei University Health System, Seoul, Korea
| | - SM Lim
- Yonsei University Health System, Seoul, Korea
| | - SI Kim
- Yonsei University Health System, Seoul, Korea
| | - SH Park
- Yonsei University Health System, Seoul, Korea
| | - HS Park
- Yonsei University Health System, Seoul, Korea
| | - JY Kim
- Yonsei University Health System, Seoul, Korea
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23
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Lim FT, Lim SM, Ramasamy K. Pediococcus acidilactici LAB4 and Lactobacillus plantarum LAB12 assimilate cholesterol and modulate ABCA1, CD36, NPC1L1 and SCARB1 in vitro. Benef Microbes 2016; 8:97-109. [PMID: 27903090 DOI: 10.3920/bm2016.0048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
There is growing interest in the use of probiotic lactic acid bacteria (LAB) for prevention of hypercholesterolaemia. This study assessed the cholesterol lowering ability of Pediococcus acidilactici LAB4 and Lactobacillus plantarum LAB12 in growth media. Both LAB yielded >98% (39.2 μg/ml) cholesterol lowering in growth media. Nile Red staining indicated direct assimilation of cholesterol by the LAB. The LAB were then explored for their prophylactic (pre-treatment of HT29 cells with LAB prior to cholesterol exposure) and biotherapeutic (treatment of HT29 cells with LAB after exposure to cholesterol) use against short and prolonged exposure of HT29 cells to cholesterol, respectively. For HT29 cells pre-treated with LAB, cholesterol lowering was accompanied by down-regulation of ATP-binding cassette family transporter-type A1 (ABCA1), cluster of differentiation 36 (CD36) and scavenger receptor class B member 1 (SCARB1). HT29 cells treated with LAB after prolonged exposure to cholesterol source, on the other hand, was associated with up-regulation of ABCA1, restoration of CD36 to basal level and down-regulation of Neimann-Pick C1-Like 1 (NPC1L1). The present findings implied the potential use of LAB4 and LAB12 as part of the strategies in prevention and management of hypercholesterolaemia.
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Affiliation(s)
- F T Lim
- 1 Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia.,2 Collaborative Drug Discovery Research (CDDR) Group, Pharmaceutical and Life Sciences Community of Research, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan, Malaysia
| | - S M Lim
- 1 Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia.,2 Collaborative Drug Discovery Research (CDDR) Group, Pharmaceutical and Life Sciences Community of Research, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan, Malaysia
| | - K Ramasamy
- 1 Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia.,2 Collaborative Drug Discovery Research (CDDR) Group, Pharmaceutical and Life Sciences Community of Research, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan, Malaysia
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Abstract
OBJECTIVES This study compared different cytotoxicity test models for evaluating resin-based composites (RBCs) and assessed the biocompatibility of standard and bulk-fill RBCs. METHODS A standard (spectrum TPH) and a bulk-fill (smart dentin replacement (SDR)) RBC were selected. Disc-shaped specimens (7 mm diameter) of 2 and 4 mm thickness were polymerized for 20 s with a LED curing light of 700 mW/cm2 irradiance. The specimens ( n = 5) were subjected to micro-hardness testing and three cytotoxicity test models (direct contact, indirect contact and extract tests) with the established L-929 cell line. Hardness ratios of top and bottom surfaces of specimens were computed to assess the effectiveness of cure. For the direct and indirect contact tests, the cells were stained and zones of inhibition were analyzed after material contact for 24 h. For the extract test, cells were exposed to extracts for 24 h, and cell viability was measured. Data was analyzed using analysis of variance/Scheffe's post hoc test and Pearson's correlation ( p < 0.05). RESULTS The lowest mean hardness ratio and highest cytotoxicity were observed for TPH at 4 mm. At 4-mm thickness, SDR was found to be biocompatible with all three models. Correlations between hardness ratio and cell viability ranged from r = 0.89-0.96 for the various tests. A significant correlation ( r = 0.97) was also observed between the three test models. CONCLUSION Our data indicated consistency between direct contact, indirect contact and extract test models for cytotoxicity testing of RBCs. Bulk placement and curing at 4 mm for the bulk-fill RBC evaluated did not result in undue cytotoxicity.
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Affiliation(s)
- S M Lim
- 1 Faculty of Dentistry, National University of Singapore, Singapore
| | - Auj Yap
- 1 Faculty of Dentistry, National University of Singapore, Singapore.,2 Department of Dentistry, Ng Teng Fong General Hospital, Jurong Health Services, Singapore
| | - Csl Loo
- 1 Faculty of Dentistry, National University of Singapore, Singapore
| | - J Ng
- 1 Faculty of Dentistry, National University of Singapore, Singapore
| | - C Y Goh
- 1 Faculty of Dentistry, National University of Singapore, Singapore
| | - Chl Hong
- 1 Faculty of Dentistry, National University of Singapore, Singapore
| | - W S Toh
- 1 Faculty of Dentistry, National University of Singapore, Singapore.,3 Tissue Engineering Program, Life Sciences Institute, National University of Singapore, Singapore
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Lyoo IK, Yoon S, Kim TS, Lim SM, Choi Y, Kim JE, Hwang J, Jeong HS, Cho HB, Chung YA, Renshaw PF. Predisposition to and effects of methamphetamine use on the adolescent brain. Mol Psychiatry 2015; 20:1516-24. [PMID: 25666756 PMCID: PMC5653271 DOI: 10.1038/mp.2014.191] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 11/13/2014] [Accepted: 12/08/2014] [Indexed: 01/16/2023]
Abstract
Adolescence is a period of heightened vulnerability both to addictive behaviors and drug-induced brain damage. Yet, only limited information exists on the brain mechanisms underlying these adolescent-specific characteristics. Moreover, distinctions in brain correlates between predisposition to drug use and effects of drugs in adolescents are unclear. Using cortical thickness and diffusion tensor image analyses, we found greater and more widespread gray and white matter alterations, particularly affecting the frontostriatal system, in adolescent methamphetamine (MA) users compared with adult users. Among adolescent-specific gray matter alterations related to MA use, smaller cortical thickness in the orbitofrontal cortex was associated with family history of drug use. Our findings highlight that the adolescent brain, which undergoes active myelination and maturation, is more vulnerable to MA-related alterations than the adult brain. Furthermore, MA-use-related executive dysfunction was greater in adolescent MA users than in adult users. These findings may provide explanation for the severe behavioral complications and relapses that are common in adolescent-onset drug addiction. Additionally, these results may provide insights into distinguishing the neural mechanisms that underlie the predisposition to drug addiction from effects of drugs in adolescents.
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Affiliation(s)
- IK Lyoo
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea,Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, South Korea,Department of Brain and Cognitive Sciences, Ewha Womans University Graduate School, Seoul, South Korea
| | - S Yoon
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - TS Kim
- Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - SM Lim
- Department of Radiology, Ewha Womans University College of Medicine, Seoul, South Korea
| | - Y Choi
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - JE Kim
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea,Department of Brain and Cognitive Sciences, Ewha Womans University Graduate School, Seoul, South Korea
| | - J Hwang
- Department of Psychiatry, Soonchunhyang University College of Medicine, Seoul, South Korea
| | - HS Jeong
- Department of Radiology, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - HB Cho
- Ewha Brain Institute, Ewha Womans University, Seoul, South Korea
| | - YA Chung
- Department of Radiology, The Catholic University of Korea College of Medicine, Seoul, South Korea
| | - PF Renshaw
- The Brain Institute and Department of Psychiatry, The University of Utah, Salt Lake City, UT, USA
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Choi JH, Lim SM, Yoo YI, Jung J, Park JW, Kim GJ. Microenvironmental Interaction Between Hypoxia and Endothelial Cells Controls the Migration Ability of Placenta-Derived Mesenchymal Stem Cells via α4 Integrin and Rho Signaling. J Cell Biochem 2015; 117:1145-57. [PMID: 26448639 DOI: 10.1002/jcb.25398] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 10/06/2015] [Indexed: 12/13/2022]
Abstract
Mesenchymal stem cells (MSCs) are a powerful source for cell therapy in degenerative diseases. The migration ability of MSCs is an important factor that enhances the therapeutic effect of the cells when they are transplanted into target tissues or organs. Hypoxia and the endothelial barrier, which are representative migration microenvironmental factors, are known to be regulated by the integrin-mediated pathway in several cancers. However, their regulatory mechanisms in MSCs remain unclear. Here, the objectives of the study were to compare the expression of markers related to integrin-mediated signaling in placenta-derived MSCs (PDMSCs) dependent on hypoxia and co-cultured with human umbilical vein endothelial cells (HUVECs) and to evaluate their correlations between migration ability and microenvironmetal factors including hypoxia and endothelial cells. The migration abilities of PDMSCs exposed to hypoxic conditions were significantly increased compared with normal fibroblasts (WI-38) and control (P < 0.05). Interestingly, decreased integrin α4 in PDMSCs under hypoxia induce to increase migration abilities of PDMSCs. Also, Rho family-related markers were significantly increased in PDMSCs under hypoxic conditions compared with normoxia (P < 0.05). Furthermore, the migration ability of PDMSCs was decreased by Rho kinase inhibitor treatment (Y-27632) and co-culturing with HUVECs in an ex vivo system. ROCK activity was increased by inhibiting integrin α4 with HUVECs and hypoxia compared with the absence of HUVECs and under normoxia. The findings suggest microenvironment event by hypoxia and the interaction with endothelial cells may be useful as a regulator of MSC migration and provide insight into the migratory mechanism of MSCs in stem cell-based therapy.
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Affiliation(s)
- Jong Ho Choi
- Department of Biomedical Science, CHA University, Seongnam-si, Republic of Korea
| | - Seung Mook Lim
- Department of Biomedical Science, CHA University, Seongnam-si, Republic of Korea
| | - Yong In Yoo
- Department of Biomedical Science, CHA University, Seongnam-si, Republic of Korea
| | - Jieun Jung
- Department of Nanobiomedical Science, Dankook University, Cheonan-si, Republic of Korea
| | - Jong-Won Park
- Department of Biomedical Sciences and Pharmacology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Gi Jin Kim
- Department of Biomedical Science, CHA University, Seongnam-si, Republic of Korea
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Lau CSL, Wong JCQ, Tan SH, Tan BC, Ng CSH, Lim SM, Wong G, Sim KLD. O-113 Advance care planning for patients hospitalised for heart failure in a multiethnic south east asian cohort. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.112] [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: 11/03/2022]
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Lim SM, Tan SH, Ng CSH, Lau CSL, Wong JCQ, Tan BC, Wong G, Sim KLD. P-87 The importance of educating healthcare workers (HWC) on advance care planning (ACP) in a south-east asian (SEA) acute hospital setting: The national heart centre singapore (NHCS) experience. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.216] [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: 11/03/2022]
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Lau CSL, Wong JCQ, Tan SH, Tan BC, Ng CSH, Lim SM, Wong G, Sim KLD. P-84 Advance care planning for patients with heart conditions in a multiethnic south east asian cohort: Impact of nurse navigator. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Wong JCQ, Lau CSL, Tan SH, Tan BC, Ng CSH, Lim SM, Wong G, Sim KLD. P-66 Contribution factors of end-of-life care options for patients in south east asian cohort. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.196] [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: 11/03/2022]
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31
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Lim SM, Tan SH, Ng CSH, Lau CSL, Wong JCQ, Tan BC, Wong G, Sim KLD. P-2 Advance care planning (ACP): The national heart centre singapore (NHCS) experience. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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32
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Ng C, Tan SH, Lim SM, Lau CSL, Wong JCQ, Tan BC, Wong G, Sim KLD. P-56 An evaluation of the satisfaction level and change in knowledge level towards advance care planning (ACP) among heart failure patients using a pre and post survey. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mishra RK, Ramasamy K, Lim SM, Ismail MF, Majeed ABA. Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films. J Mater Sci Mater Med 2014; 25:1925-1939. [PMID: 24831081 DOI: 10.1007/s10856-014-5228-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 04/21/2014] [Indexed: 06/03/2023]
Abstract
The present study investigates the development of methyl cellulose (MC)-sodium alginate (SA)-montmorillonite (MMT) clay based bionanocomposite films with interesting wound healing properties. The differential scanning calorimetry analysis of the composite films revealed presence of single glass transition temperature (Tg) confirming the miscible nature of the ternary blended films. The increase in MMT ratio in the composite films reduced the mobility of biopolymer chains (MC/SA) which increased the Tg of the film. Thermogravimetric analysis showed that dispersion of clay (MMT) at nano level significantly delayed the weight loss that correlated with higher thermal stability of the composite films. It was observed that the developed films were able to exhibit antimicrobial activity against four typical pathogenic bacteria found in the presence of wound. The developed films were able to significantly inhibit (10 mg/ml) the growth of Enterococcus faecium and Pseudomonas aeruginosa. In vitro scratch assay indicated potential wound closure activities of MC-2-4 bionanocomposite films at their respective highest subtoxic doses. In conclusion, these ternary bionanocomposite films were found to be promising systems for wound healing applications.
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Affiliation(s)
- R K Mishra
- Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300, Bandar Puncak Alam, Selangor, Malaysia,
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Rohilla P, Deep A, Kamra M, Narasimhan B, Ramasamy K, Mani V, Mishra RK, Lim SM. Synthesis, antimicrobial and anticancer evaluation of N'-(substituted benzylidene)-2-(benzo[d]oxazol-3(2H)-yl)acetohydrazide derivatives. Drug Res (Stuttg) 2014; 64:505-9. [PMID: 24992500 DOI: 10.1055/s-0034-1368720] [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: 10/25/2022]
Abstract
A series of N'-(substituted benzylidene)-2-(benzo[d]oxazol-3(2H)-yl)acetohydrazide derivatives was synthesized and evaluated for its in vitro antimicrobial and anticancer activities. Antimicrobial activity results revealed that compound 12 was found to be the most potent antimicrobial agent. Results of anticancer study indicated that the synthesized compounds exhibited average anticancer potential. Compound 7 (IC 50 =3.12 µM) and compound 16 (IC 50 =2.88 µM) were found to be most potent against breast cancer (MCF7) cell lines. In conclusion, compound 12 and 16 have the potential to be selected as lead compound for the developing of novel antimicrobial and anticancer agents respectively.
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Affiliation(s)
- P Rohilla
- Department of Pharmaceutical Chemistry, Hindu College of Pharmacy, Sonepat, India
| | - A Deep
- Faculty of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, India
| | - M Kamra
- Department of Pharmaceutical Chemistry, Hindu College of Pharmacy, Sonepat, India
| | - B Narasimhan
- Faculty of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, India
| | - K Ramasamy
- Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - V Mani
- Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - R K Mishra
- Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - S M Lim
- Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor, Malaysia
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Lee Y, Chang SW, Perinpanayagam H, Yoo YJ, Lim SM, Oh SR, Gu Y, Ahn SJ, Kum KY. Autotransplantation of mesiodens for missing maxillary lateral incisor with cone-beam CT-fabricated model and orthodontics. Int Endod J 2014; 47:896-904. [PMID: 24298936 DOI: 10.1111/iej.12223] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 11/28/2013] [Indexed: 11/28/2022]
Abstract
AIM Autotransplantation is a viable treatment option for a missing tooth when there is a suitable donor, especially in adolescents with remaining facial growth. This report presents the aesthetic restoration of a missing maxillary lateral incisor through orthodontic treatment and autotransplantation of a mesiodens using a CBCT-fabricated rapid-prototyping model. SUMMARY A 14-year-old male patient with a congenitally missing maxillary lateral incisor was referred from the Department of Orthodontics. The teeth were moved orthodontically to regain space for the missing lateral incisor and to close the space of the mesiodens after transplantation. A replica of the donor tooth was fabricated from a cone-beam computed tomography scan through a rapid-prototyping machine before autotransplantation surgery. The model was used to create a socket for the graft tooth, thereby shortening the extra-oral time and minimizing the damage to the root surface. After transplantation and orthodontic tooth movement, the mesiodens was finally restored with an aesthetic laminate restoration. Over 3 years, the aesthetics remained excellent, and the transplant functioned normally without any signs or symptoms of root resorption. KEY LEARNING POINT Missing anterior teeth may be replaced through a combination of orthodontics, autotransplantation with a rapid-prototyping model and prosthodontic restoration, in growing patients.
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Affiliation(s)
- Y Lee
- Department of Conservative Dentistry, Wonju Severance Christian Hospital, Yonsei University, Wonju, Korea
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36
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Lim SM, Chang H, Yoon MJ, Hong YK, Kim H, Chung WY, Park CS, Nam KH, Kang SW, Kim MK, Kim SB, Lee SH, Kim HG, Na II, Kim YS, Choi MY, Kim JG, Park KU, Yun HJ, Kim JH, Cho BC. A multicenter, phase II trial of everolimus in locally advanced or metastatic thyroid cancer of all histologic subtypes. Ann Oncol 2013; 24:3089-94. [PMID: 24050953 DOI: 10.1093/annonc/mdt379] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- S M Lim
- Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul
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Kim HR, Lim SM, Kim HJ, Hwang SK, Park JK, Shin E, Bae MK, Ou SHI, Wang J, Jewell SS, Kang DR, Soo RA, Haack H, Kim JH, Shim HS, Cho BC. The frequency and impact of ROS1 rearrangement on clinical outcomes in never smokers with lung adenocarcinoma. Ann Oncol 2013; 24:2364-70. [PMID: 23788756 DOI: 10.1093/annonc/mdt220] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND To determine the frequency and predictive impact of ROS1 rearrangements on treatment outcomes in never-smoking patients with lung adenocarcinoma. PATIENTS AND METHODS We concurrently analyzed ROS1 and ALK rearrangements and mutations in the epidermal growth factor receptor (EGFR), and KRAS in 208 never smokers with lung adenocarcinoma. ROS1 and ALK rearrangements were identified by fluorescent in situ hybridization. RESULTS Of 208 tumors screened, 7 (3.4%) were ROS1 rearranged, and 15 (7.2%) were ALK-rearranged. CD74-ROS1 fusions were identified in two patients using reverse transcriptase-polymerase chain reaction. The frequency of ROS1 rearrangement was 5.7% (6 of 105) among EGFR/KRAS/ALK-negative patients. Patients with ROS1 rearrangement had a higher objective response rate (ORR; 60.0% versus 8.5%; P = 0.01) and a longer median progression-free survival (PFS; not reached versus 3.3 months; P = 0.008) to pemetrexed than those without ROS1/ALK rearrangement. The PFS to EGFR-tyrosine kinase inhibitors in patients harboring ROS1 rearrangement was shorter than those without ROS1/ALK rearrangement (2.5 versus 7.8 months; P = 0.01). CONCLUSIONS The frequency of ROS1 rearrangements in clinically selected patients is higher than that reported for unselected patients, suggesting that ROS1 rearrangement is a druggable target in East-Asian never smokers with lung adenocarcinoma. Given the different treatment outcomes to conventional therapies and availability of ROS1 inhibitors, identification of ROS1 rearrangement can lead to successful treatment in ROS1-rearranged lung adenocarcinomas.
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Affiliation(s)
- H R Kim
- Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea
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Cheah CY, Carney DA, Lim SM, Januszewicz H, Scarlett J, Seymour JF. Local experience with the novel human anti-CD20 antibody, ofatumumab, as salvage treatment for patients with heavily pretreated chronic lymphocytic leukaemia. Intern Med J 2012; 42:846-8. [PMID: 22805693 DOI: 10.1111/j.1445-5994.2012.02827.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
MESH Headings
- Aged
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antigens, CD20/immunology
- Diagnosis, Differential
- Disease-Free Survival
- Erythrocyte Transfusion
- Female
- Follow-Up Studies
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Lymphocytosis/drug therapy
- Lymphocytosis/immunology
- Male
- Middle Aged
- Salvage Therapy/methods
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Abstract
The filum terminale is an anatomic structure at the end of the spinal cord. Only a few cases of AVFs of the filum terminale have been reported. These AVFs usually consist of a single communication between the anterior spinal artery and a single draining vein. We retrospectively analyzed the clinical and radiologic features and treatment of 4 patients with spinal AVFs of the filum terminale. Clinical manifestations and MR images are similar to those of spinal dural AVFs. All patients underwent surgical or endovascular treatment, resulting in complete occlusion. Clinical outcomes were good to excellent in all patients.
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Affiliation(s)
- S M Lim
- Department of Radiology, Ewha Womans University Hospital, Seoul, Korea
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Choi MJ, Kim Y, Hong YS, Shim SS, Lim SM, Lee JK. Transthoracic needle biopsy using a C-arm cone-beam CT system: diagnostic accuracy and safety. Br J Radiol 2011; 85:e182-7. [PMID: 21791505 DOI: 10.1259/bjr/95413532] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The purpose of this study was to evaluate the diagnostic accuracy and safety of performing transthoracic needle biopsy (TNB) under combined fluoroscopy and CT guidance using a C-arm cone-beam CT (CBCT) system. METHODS We evaluated the diagnostic accuracy and safety of performing TNB using a C-arm CBCT system. We retrospectively evaluated 99 TNB cases performed in 98 patients using a C-arm CBCT system with an 18-gauge automated cutting needle. We reviewed the diagnostic accuracy according to the size and depth of the lesion, incidence of complications, additional treatment for complications, procedure time, number of needle passes per biopsy and radiation dose. RESULTS The final diagnoses revealed 72 malignant and 27 benign lesions. The overall malignancy sensitivity, malignancy specificity and diagnostic accuracy were 95.8%, 100% and 97.0%, respectively, and those for small pulmonary nodules <20 mm in size were 94.1%, 100% and 96.6%, respectively. There was no significant difference in the correct diagnosis of malignancy according to lesion size (p = 0.634) or depth (p = 0.542). For benign lesions, a specific diagnosis was obtained in 14 cases (51.9%). TNB induced complications in 19 out of 99 procedures (19.2%), including pneumothorax (16.2%), immediate haemoptysis (2.0%) and subcutaneous emphysema (1.0%). Among these, four patients with pneumothorax required chest tube insertion (2.0%) or pig-tail catheter drainage (2.0%). The mean procedure time, number of needle passes and radiation doses were 11.9 ± 4.0 min, 1.2 ± 0.5 times and 170.0 ± 67.2 mGy, respectively. CONCLUSION TNB using a C-arm CBCT system provides high diagnostic accuracy with a low complication rate and a short procedure time, particularly for small pulmonary nodules.
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Affiliation(s)
- M J Choi
- Department of Radiology, School of Medicine, Ewha Womans University, Seoul, Republic of Korea
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41
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Lim SM, Choi IS, Hum BA, David CA. Dissecting aneurysms of the distal segment of the posterior inferior cerebellar arteries: clinical presentation and management. AJNR Am J Neuroradiol 2010; 31:1118-22. [PMID: 20190207 DOI: 10.3174/ajnr.a2014] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [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: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Dissecting aneurysms of the distal segment of the PICA are rare. The purpose of this study was to evaluate the clinical presentations, imaging features, treatment options, and clinical outcomes of dissecting PICA aneurysms. MATERIALS AND METHODS Six patients with dissecting aneurysms in the distal segments of PICA were found in the database of a single medical center, from November 1996 to December 2008, and retrospectively evaluated. Treatment mode and follow-up clinical outcomes were analyzed. RESULTS Five patients with dissecting PICA aneurysms presented with acute intracranial hemorrhage and 1 patient presented with a large mass from an intramural hematoma. All 5 patients with intracranial hemorrhage were treated with endovascular occlusion of both the dissecting PICA aneurysm and the distal parent artery. The patient with the intramural hematoma underwent surgical trapping with end-to-end anastomosis. In 1 patient, the dissecting aneurysm recurred twice within a 5 year 3 month period, despite endovascular occlusion of both the aneurysm and the parent artery. The clinical outcome postprocedure was excellent in all patients, without permanent neurologic complication. CONCLUSIONS For the endovascular treatment of dissecting aneurysms in the distal PICA segments, we recommend occlusion of both the dissecting aneurysm and the parent artery to avoid leaving the point of initial intimal tear untreated. All of our patients had excellent clinical outcomes; however, our experience with recanalization illustrates the need for close follow-up of patients.
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Affiliation(s)
- S M Lim
- Department of Radiology, Ewha Womans University Hospital, Seoul, Korea
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Lim SM, Choi IS. Spinal epidural arteriovenous fistula: a unique pathway into the perimedullary vein. A case report. Interv Neuroradiol 2009; 15:466-9. [PMID: 20465888 DOI: 10.1177/159101990901500417] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 11/24/2009] [Indexed: 11/17/2022] Open
Abstract
SUMMARY Spinal dural arteriovenous fistulas (AVFs) are rare vascular malformations in the spinal dura, fed by dural branches of the radicular arteries, and drain primarily into intradural venous plexuses. They may cause elevated medullary venous pressure and produce a progressive myelopathy. We describe a case of AVF in the epidural space of the previous surgery site of L3 and it showed a unique complex venous pathway into the perimedullary vein, leading to classic clinical symptoms of venous congestion in the spinal cord. The shunt was draining into bilateral epidural venous plexus and then to the paravertebral veins at the level of L2. The venous outflow entered to the epidural space again and finally refluxed into the intradural perimedullary vein.
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Affiliation(s)
- S M Lim
- Lahey Clinic Medical Center; Burlington, MA, USA -
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Lim SM, Ellerby DJ. The effects of acute temperature change on cost of transport at maximal labriform speed in bluegill Lepomis macrochirus. J Fish Biol 2009; 75:938-943. [PMID: 20738591 DOI: 10.1111/j.1095-8649.2009.02349.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The effects of acute temperature change on the cost of bluegill Lepomis macrochirus swimming were quantified. At 14 degrees C, maximum labriform swimming speed (U(lab,max)) was reduced relative to that at the acclimation temperature of 22 degrees C, but total cost of transport (T(TC)) remained unchanged. At 30 degrees C, U(lab,max) was the same as at 22 degrees C, but T(TC) was 66% greater.
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Affiliation(s)
- S M Lim
- Department of Biological Sciences, Wellesley College, 106 Central Street, Wellesley, MA 02482, USA
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Boo NY, Lim SM, Koh KT, Lau KF, Ravindran J. Risk factors associated with low birth weight infants in the Malaysian population. Med J Malaysia 2008; 63:306-310. [PMID: 19385490] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study aimed to identify the risk factors which were significantly associated with low birth weight (LBW, <2500 g) infants among the Malaysian population. This was a case-control study carried out at the Tuanku Jaafar Hospital, Seremban, Malaysia over a five-month period. Cases were all infants born with birth weight less than 2500 g. Control infant were selected with the help a random sampling table from among infants with birth weight of > or =2500 g born on the same day in the hospital. Of 3341 livebirths delivered in the hospital, 422 (12.6%) were LBW infants. Logistic regression analysis showed that, after controlling for various potential confounders, the only significant risk factors associated with infants of LBW were gestational age (adjusted odds ratio (OR)=0.6, 95% C.I.: 0.5, 0.6; < 0.0001), maternal pre-pregnancy weight (adjusted OR = 0.97, 95% C.I.: 0.95, 0.99; p < 0.0001), nulliparity (adjusted OR = 3.4, 95% C.I.: 2.2, 5.1; p < 0.0001), previous history of LBW infants (adjusted OR = 2.3, 95% C.I.: 1.4, 3.8; p=0.001) and PIH during current pregnancy (adjusted OR=3.3, 95% C.I.: 1.6, 6.6; p = 0.001). A number of potentially preventable or treatable risk factors were identified to be associated with LBW infants in Malaysia.
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Affiliation(s)
- N Y Boo
- Department of Paediatrics, Clincial School, International Medical University, Malaysia.
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Park YH, Kim S, Choi SJ, Ryoo BY, Yang SH, Cheon GJ, Choi CW, Lim SM, Yoo JY, Lee SS. Clinical impact of whole-body FDG-PET for evaluation of response and therapeutic decision-making of primary lymphoma of bone. Ann Oncol 2005; 16:1401-2. [PMID: 15870088 DOI: 10.1093/annonc/mdi234] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
A samarium 153-chitosan complex was prepared by simply mixing acidic solutions of chitosan and (153)SmCl(3). When a solution of this complex was injected into the knee joints of rabbits, minimal extra-articular leakage was observed. This can be attributed to the rapid change in the pH of the complex solution from acidic to neutral, resulting in the formation of gel followed by the subsequent retention in the administered site. Thus, the complex solution represents a promising candidate for radiation synovectomy.
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Affiliation(s)
- B C Shin
- Department of Radioisotope, Korea Atomic Energy Research Institute, Taejon, South Korea
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Mok P, Seshadri RS, Siow JK, Lim SM. Swallowing problems in post irradiated NPC patients. Singapore Med J 2001; 42:312-6. [PMID: 11599626] [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: 02/21/2023]
Abstract
We present three patients with Nasopharyngeal Carcinoma (NPC) developing swallowing problems after radiotherapy as the primary modality of treatment. All patients had advanced stage NPC presenting with enlarged neck nodes and underwent radical external beam radiotherapy. All three patients had both CN X and CN XII palsies and had difficulty in both the oral and pharyngeal phases of swallowing. None of them has any clinical or radiological evidence of local recurrence in the post nasal space and neck or metastasis to the skull base. One patient underwent cricopharyngeal myotomy with epiglottopexy and hyoid suspension which failed and subsequently underwent laryngectomy. Another patient had medialisation thyroplasty and the third underwent a percutaneous endoscopic gastrostomy (PEG).
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Affiliation(s)
- P Mok
- Department of Otolaryngology, Tan Tock Seng Hospital, Singapore.
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Reid ME, Sausais L, Oyen R, Storry JR, Shukla H, Hsu T, Lim SM. First example of hemolytic disease of the newborn caused by anti-Or and confirmation of the molecular basis of Or. Vox Sang 2001; 79:180-2. [PMID: 11111238 DOI: 10.1159/000031238] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND OBJECTIVES The rare MNS antigen Or (MNS31) is sensitive to ficin, papain and sialidase, but partially resistant to trypsin (0.05%); the effect of alpha-chymotrypsin is not known. A point mutation, 204C --> T in exon 3 of GYPA, is associated with the Or+ phenotype. We report here the first case of hemolytic disease of the newborn (HDN) caused by anti-Or, and expand the information on the nature of the Or determinant. MATERIALS AND METHODS A woman, gravida 4, para 0, delivered a baby whose red blood cells (RBCs) were positive (2+) on the direct antiglobulin test (DAT). The mother's serum, an eluate made from the baby's RBCs and the RBCs of the baby's father were investigated. Exon 3 of GYPA, extracted from the father's genomic DNA, was amplified and sequenced. RESULTS The mother's serum reacted at room temperature, 37 degrees C and on the indirect antiglobulin test with RBCs from the baby's father. The father's RBCs were M+N+S-s+Or+. The antibody in the mother's serum and in the baby's eluate was identified as anti-Or. The serum did not react with the father's RBCs treated with trypsin (180,000 U/ml), but did react with his alpha-chymotrypsin-treated RBCs. Amplification and sequencing of DNA from the father revealed a single point mutation, 204C --> T, in GYPA exon 3. At birth, the baby had clinical symptoms of HDN and was transfused with 36 ml of packed RBCs and received phototherapy for eight days. At week 11, the baby's M+N+S+s+Or+ RBCs were negative on the DAT. CONCLUSION This is the first case of HDN caused by anti-Or. The observed point mutation, 204C --> T, confirms that of a previous report and predicts a change of Arg (Or-) to Trp (Or+) at amino acid 31.
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Affiliation(s)
- M E Reid
- New York Blood Center, New York, NY 10021, USA.
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Oh SJ, Moon DH, Ha HJ, Park SW, Hong MK, Park SJ, Choi TH, Lim SM, Choi CW, Knapp FF, Lee HK. Automation of the synthesis of highly concentrated 188Re-MAG3 for intracoronary radiation therapy. Appl Radiat Isot 2001; 54:419-27. [PMID: 11214876 DOI: 10.1016/s0969-8043(00)00279-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/17/2022]
Abstract
We have developed an efficient method and an automated synthetic system for the preparation of highly concentrated 188Re-MAG3. Routine production of 188Re-MAG3 for use in intracoronary radiation therapy was performed by compressed air driven semi-automated shielded system. 188Re-MAG3 was prepared with a commercial kit and reducing agents, purified and concentrated by C18 Sep-Pak cartridges to desired radioactivity and volume. Using this automated system, reproducible radiolabeling yields of 80-85% were obtained.
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Affiliation(s)
- S J Oh
- Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
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