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Kim H, Kang MJ, Baek JK, Lee JK, Choi EA, Yun BH, Kim EH, Seo SK. Relationship between menopausal hormone therapy and incidence of fractures in postmenopausal women. Climacteric 2024; 27:165-170. [PMID: 37947171 DOI: 10.1080/13697137.2023.2273528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/15/2023] [Indexed: 11/12/2023]
Abstract
OBJECTIVE Long-term protective effects of menopausal hormone therapy (MHT) at fractures with different doses and components are controversial. We analyzed the effect of MHT on the incidence of spine and femur fractures according to MHT type, age at commencement, duration and dose of hormones in Korean women. METHOD This retrospective study evaluated propensity score-matched patients with MHT from the Korean National Health Insurance Service database. Among women aged ≥50 years with menopause between 2004 and 2007, spine and femur fracture incidence until 2017 was analyzed in 36,446 women who had received MHT for >1 year. Estrogen-progesterone therapy (EPT), estrogen-only therapy (ET) or tibolone therapy was conducted. RESULTS EPT significantly lowered the incidence of spine and femur fractures with a conventional dose, but not with a low dose. Tibolone significantly decreased the incidence of spine fractures in women aged 50-59 years when used for >5 years, and the incidence of femur fractures in women older than 60 years when used for >3 years. ET significantly lowered the risk of femur fractures when estradiol was used for >5 years. CONCLUSION In menopausal women, all MHT including conventional-dose EPT, ET and tibolone tended to lower the incidence of fractures. The effects, however, varied with the type of fracture and type of MHT.
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Affiliation(s)
- Heeyon Kim
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Min Jin Kang
- Department of Health Insurance Research, National Health Insurance Service, Ilsan Hospital, Goyang, Republic of Korea
- Department of Epidemiology and Biostatistics, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Jin Kyung Baek
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Kyung Lee
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun A Choi
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Bo Hyun Yun
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eui Hyeok Kim
- Department of Obstetrics and Gynecology, Ilsan Cha Hospital, Goyang, Republic of Korea
| | - Seok Kyo Seo
- Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Choi SM, Park HJ, Choi EA, Jung KC, Lee JI. CD1b glycoprotein, a crucial marker of thymocyte development during T cell maturation in cynomolgus monkeys. Sci Rep 2023; 13:14388. [PMID: 37658106 PMCID: PMC10474046 DOI: 10.1038/s41598-023-41708-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 08/30/2023] [Indexed: 09/03/2023] Open
Abstract
Phenotypic markers that denote different developmental stages of thymocytes are important for understanding T cell development in the thymus. Here, we show that CD1b is a critical discriminator of thymocyte maturation stage in cynomolgus monkeys. CD1b was expressed by immature thymocytes prior to β-selection, and its expression decreased as cells became fully mature in the thymus. MHC-I expression was lowest at the CD3loCD1b+ immature double-positive (DP) stage, while the ratio of CD1d:MHC-I expression was significantly higher at this stage than at other developmental stages. PLZF was expressed by < 0.2% of thymocytes; most PLZF+ thymocytes were CD3-/loCD1b+ immature DP thymocytes with the potential to produce IL-4. EOMES+ thymocytes, which accounted for > 2% of total thymocytes, were mostly CD3+CD1b- mature thymocytes and predominantly of the CD8 single-positive (SP) lineage. An unconventional CD8+ T cell subset expressing the NKG2AC+CXCR3+ innate-like T cell marker was identified within the EOMES+ CD8 SP lineage; these cells exhibited a memory phenotype. Taken together, these findings show that CD1b is a valuable discriminatory marker of thymocyte development. The data presented herein can be used to characterize the features of PLZF- and EOMES-associated unconventional T cells in the thymus.
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Affiliation(s)
- Sung Min Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Hi Jung Park
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Eun A Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Kyeong Cheon Jung
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Department of Pathology, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
- Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, 03080, Republic of Korea
| | - Jae Il Lee
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
- Department of Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
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Kim HI, Choi EA, Paik EC, Park S, Hwang YI, Lee JH, Seo SK, Cho S, Choi YS, Lee BS, Park J, Lee S, Lee KR, Yun BH. Identification of Single Nucleotide Polymorphisms as Biomarkers for Recurrent Pregnancy Loss in Korean Women. J Korean Med Sci 2022; 37:e336. [PMID: 36631028 PMCID: PMC9705206 DOI: 10.3346/jkms.2022.37.e336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/12/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Single nucleotide polymorphisms (SNPs) are reportedly associated with repeated abortion. Thus, genetic analysis based on race is the key to developing accurate diagnostic tests. This study analyzed the genetic polymorphisms of recurrent pregnancy loss (RPL) patients among Korean women compared to the controls. METHODS In 53 women of RPL group and 50 controls, the genetic analysis was performed. The genotype distribution and allele frequency were analyzed statistically for the difference between the two groups. The association between each SNP marker and RPL risk was analyzed. RESULTS The genotypes of LEPR, endothelial nitric oxide synthase (eNOS), KDR, miR-27a, miR-449b, and tumor necrosis factor-alpha (TNF-α) were analyzed using odds ratio (OR) with 95% confidence intervals (CIs). Only the AG genotype of miR-449b (A>G) polymorphism showed significant association with the risk of RPL when compared to the AA genotype (OR, 2.39). The combination of GG/AG+GG/CA+AA genotypes for eNOS/miR-449b/TNF-α was associated with 7.36-fold higher risk of RPL (OR, 7.36). The GG/AG+GG combination for eNOS/miR-449b showed 2.43-fold higher risk for RPL (OR, 2.43). The combination of AG+GG/CA+AA genotypes for miR-449b/TNF-α showed a significant association with the risk of RPL (OR, 7.60). From the haplotype-based analysis, the G-G-A haplotype of eNOS/miR-449b/TNF-α and the G-A haplotype of miR-449b/TNF-α were associated with increased risk of RPL (OR, 19.31; OR, 22.08, respectively). CONCLUSION There is a significant association between the risk of RPL and miR-449b/TNF-α combination, and therefore, genetic analysis for specific combined genotypes can be an important screening method for RPL in Korean women.
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Affiliation(s)
- Hye In Kim
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Eun A Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | | | | | - Yu Im Hwang
- Bundang Cheil Women's Hospital, Seongnam, Korea
| | - Jae Hoon Lee
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Seok Kyo Seo
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - SiHyun Cho
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Young Sik Choi
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Byung Seok Lee
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Jimyeong Park
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea
| | - Sanghoo Lee
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea.
| | - Kyoung-Ryul Lee
- Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea
| | - Bo Hyon Yun
- Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Bundang Cheil Women's Hospital, Seongnam, Korea.
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Choi SM, Park HJ, Choi EA, Jung KC, Lee JI. Heterogeneity of circulating CD4 +CD8 + double-positive T cells characterized by scRNA-seq analysis and trajectory inference. Sci Rep 2022; 12:14111. [PMID: 35982155 PMCID: PMC9388645 DOI: 10.1038/s41598-022-18340-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022] Open
Abstract
The frequency of CD4+CD8+ double-positive (DP) T cells is highly associated with a variety of diseases. Recently, we used high-throughput single-cell RNA sequencing to show that circulating DP T cells in cynomolgus monkeys comprise nine heterogeneous populations. To better understand the characteristics of DP T cells, we analyzed 7601 cells from a rhesus monkey and detected 14,459 genes. Rhesus monkey DP T cells comprised heterogeneous populations (naïve, Treg-, Tfh-, CCR9+ Th-, Th17-, Th2-, Eomes+ Tr1-, CTL-, PLZF+ innate- and Eomes+ innate-like cells) with multiple potential functions. We also identified two new subsets using aggregated scRNA-seq datasets from the rhesus and the cynomolgus monkey: CCR9+ Th-like cells expressing ICAM2 and ITGA1, and PLZF+ innate-like cells that display innate-associated gene signatures such as ZBTB16, TYROBP, MAP3K8, and KLRB1. Trajectory inference of cell differentiation status showed that most DP T cells in the rhesus monkey were found in the mid-to-late pseudotime, whereas DP T cells from the cynomolgus monkey were found in early pseudotime. This suggests that DP T cells in rhesus monkeys may exhibit more diverse differentiation states than those in cynomolgus monkeys. Thus, scRNA-seq and trajectory inference identified a more diverse subset of the circulating DP T cells than originally thought.
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Affiliation(s)
- Sung Min Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Hi Jung Park
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Eun A Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Kyeong Cheon Jung
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, 03080, Republic of Korea
| | - Jae Il Lee
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea. .,Department of Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
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Lee S, Yeol Ryu H, Kang SJ, Jin Kim H, Choi EA, Kim HG, Seo HH, Choi JY, Chea C, Seuk Song K. A Traditional Medicine-Based Combination of Bamboo Salt and Egg White-Chalcanthite Ameliorates Atopic Dermatitis. Indian J Pharm Sci 2022. [DOI: 10.36468/pharmaceutical-sciences.970] [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: 11/22/2022] Open
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Choi EA, Jean-Richard-Dit-Bressel P, Clifford C, Mcnally G. Paraventricular thalamus controls behavior during motivational conflict. IBRO Rep 2019. [DOI: 10.1016/j.ibror.2019.07.224] [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: 11/16/2022] Open
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Choi EA, Choi YS, Lee EJ, Singh SR, Kim SC, Chang S. A pharmacogenomic analysis using L1000CDS 2 identifies BX-795 as a potential anticancer drug for primary pancreatic ductal adenocarcinoma cells. Cancer Lett 2019; 465:82-93. [PMID: 31404615 DOI: 10.1016/j.canlet.2019.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 05/14/2019] [Revised: 08/07/2019] [Accepted: 08/07/2019] [Indexed: 01/18/2023]
Abstract
Pancreatic cancer is one of the leading causes of cancer death, mainly due to the absence of early diagnostic tool and effective therapeutic agents. To identify an effective therapeutic agent for pancreatic ductal adenocarcinoma cells (PDAC), we used 10 Gene Expression Omnibus (GEO) data sets and L1000CDS2 pharmacogenetic search tool and obtained chemical "perturvants" that were predicted to reverse the abnormal gene expression changes in PDAC. Among 20 initial candidates, we measured IC50 for six compounds and identified BX-795, PDK1/TBK1 inhibitor, as a therapeutic candidate. We found that BX-795 inhibits primary PDAC cell proliferation more effectively than normal cells. Following molecular analysis revealed that BX-795 down-regulates mTOR-GSK3β pathway and trigger apoptosis. Moreover, we found that BX-795 suppresses primary PDAC cell migration via downregulation of Snail and Slug. Finally, efficacy test in patient-derived xenograft model of PDAC showed BX-795 can inhibit in vivo tumor growth as efficient as gemcitabine and a combination with trametinib further suppresses tumor growth. Collectively, these results demonstrate the BX-795 as an effective therapeutic candidate for PDAC treatment.
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Affiliation(s)
- Eun A Choi
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea
| | - Yeon-Sook Choi
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea
| | - Eun Ji Lee
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea
| | - Shree Ram Singh
- Basic Research Laboratory, National Cancer Institute, Frederick, MD, 21702, USA.
| | - Song Cheol Kim
- Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea.
| | - Suhwan Chang
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea; Department of Physiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05505, Republic of Korea.
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Kim I, Choi YS, Song JH, Choi EA, Park S, Lee EJ, Rhee JK, Kim SC, Chang S. A drug-repositioning screen for primary pancreatic ductal adenocarcinoma cells identifies 6-thioguanine as an effective therapeutic agent for TPMT-low cancer cells. Mol Oncol 2018; 12:1526-1539. [PMID: 30055072 PMCID: PMC6120251 DOI: 10.1002/1878-0261.12364] [Citation(s) in RCA: 11] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/13/2018] [Accepted: 06/27/2018] [Indexed: 01/19/2023] Open
Abstract
Pancreatic cancer is one of the most difficult cancers to cure due to the lack of early diagnostic tools and effective therapeutic agents. In this study, we aimed to isolate new bioactive compounds that effectively kill pancreatic ductal adenocarcinoma (PDAC) cells, but not untransformed, human pancreatic ductal epithelial (HPDE) cells. To this end, we established four primary PDAC cell lines and screened 4141 compounds from four bioactive-compound libraries. Initial screening yielded 113 primary hit compounds that caused over a 50% viability reduction in all tested PDAC cells. Subsequent triplicate, dose-dependent analysis revealed three compounds with a tumor cell-specific cytotoxic effect. We found that these three compounds fall into a single category of thiopurine biogenesis. Among them, 6-thioguanine (6-TG) showed an IC50 of 0.39-1.13 μm toward PDAC cells but had no effect on HPDE cells. We propose that this cancer selectivity is due to differences in thiopurine methyltransferase (TPMT) expression between normal and cancer cells. This enzyme is responsible for methylation of thiopurine, which reduces its cytotoxicity. We found that TPMT levels were lower in all four PDAC cell lines than in HPDE or Panc1 cells, and that knockdown of TPMT in HPDE or Panc1 cells sensitized them to 6-TG. Lastly, we used a patient-derived xenograft model to confirm that 6-TG has a significant antitumor effect in combination with gemcitabine. Overall, our study presents 6-TG as a strong candidate for use as a therapeutic agent against PDAC with low levels of TPMT.
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Affiliation(s)
- Inki Kim
- Convergence Medicine Research Center (CREDIT)/Biomedical Research Center, Asan Institute for Life Sciences, Seoul, Korea.,Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yeon-Sook Choi
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Hwi Song
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun A Choi
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sojung Park
- Convergence Medicine Research Center (CREDIT)/Biomedical Research Center, Asan Institute for Life Sciences, Seoul, Korea
| | - Eun Ji Lee
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Je-Keun Rhee
- Cancer Research Institute, Catholic University of Korea, Seoul, Korea
| | - Song Cheol Kim
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Suhwan Chang
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.,Department of Physiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Jo SY, Choi EA, Lee JJ, Chang HC. Characterization of starter kimchi fermented with Leuconostoc kimchii GJ2 and its cholesterol-lowering effects in rats fed a high-fat and high-cholesterol diet. J Sci Food Agric 2015; 95:2750-2756. [PMID: 25425317 DOI: 10.1002/jsfa.7018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 11/06/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND The hypocholesterolemic effects of lactic acid bacteria and kimchi have been demonstrated previously. However, the kimchi fermentation process still relies on naturally present microorganisms. To obtain functional kimchi with consistent quality, we validated the capacity of Leuconostoc kimchii GJ2 as a starter culture to control kimchi fermentation. Moreover, cholesterol-lowering effects of starter kimchi as a health-promoting product were explored. RESULTS Bacteriocin production by Lc. kimchii GJ2 was highly enhanced in the presence of 5% Lactobacillus sakei NJ1 cell fractions. When kimchi was fermented with bacteriocin-enhanced Lc. kimchii GJ2, Lc. kimchii GJ2 became overwhelmingly predominant (98.3%) at the end of fermentation and maintained its dominance (up to 82%) for 84 days. Growing as well as dead cells of Lc. kimchii GJ2 showed high cholesterol assimilation (in vitro). Rats were fed a high-fat and high-cholesterol diet supplemented with starter kimchi. The results showed that feeding of starter kimchi significantly reduced serum total cholesterol, triglyceride and low-density lipoprotein cholesterol levels. Additionally, atherogenic index, cardiac risk factor and triglyceride and total cholesterol levels in liver and epididymal adipose tissue decreased significantly in rats fed starter kimchi. CONCLUSION Kimchi fermented with Lc. kimchii GJ2 as a starter culture has efficient cholesterol-lowering effects.
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Affiliation(s)
- Se Yeon Jo
- Department of Food and Nutrition, and Kimchi Research Center, Chosun University, Gwangju 501-759, Republic of Korea
| | - Eun A Choi
- Department of Food and Nutrition, and Kimchi Research Center, Chosun University, Gwangju 501-759, Republic of Korea
| | - Jae Joon Lee
- Department of Food and Nutrition, and Kimchi Research Center, Chosun University, Gwangju 501-759, Republic of Korea
| | - Hae Choon Chang
- Department of Food and Nutrition, and Kimchi Research Center, Chosun University, Gwangju 501-759, Republic of Korea
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11
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Hamlin AS, Clemens KJ, Choi EA, McNally GP. Paraventricular thalamus mediates context-induced reinstatement (renewal) of extinguished reward seeking. Eur J Neurosci 2009; 29:802-12. [PMID: 19200064 DOI: 10.1111/j.1460-9568.2009.06623.x] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Paraventricular thalamus (PvTh) is uniquely placed to contribute to reinstatement of drug and reward seeking. It projects extensively to regions implicated in reinstatement including accumbens shell (AcbSh), prefrontal cortex (PFC) and basolateral amygdala (BLA), and receives afferents from other regions important for reinstatement such as lateral hypothalamus. We used complementary neuroanatomical and functional approaches to study the role of PvTh in context-induced reinstatement (renewal) of extinguished reward-seeking. Rats were trained to respond for a reward in context A, extinguished in context B and tested in context A or B. We applied the neuronal tracer cholera toxin B subunit (CTb) to AcbSh and examined retrograde-labelled neurons, c-Fos immunoreactivity (IR) and dual c-Fos/CTb labelled neurons in PvTh and other AcbSh afferents. In PvTh there was c-Fos IR in CTb-positive neurons associated with renewal showing activation of a PvTh-AcbSh pathway during renewal. In PFC there was little c-Fos IR in CTb-positive or negative neurons associated with renewal. In BLA, two distinct patterns of activation and retrograde labelling were observed. In rostral BLA there was significant c-Fos IR in CTb-negative neurons associated with renewal. In caudal BLA there was significant c-Fos IR in CTb-positive neurons associated with being tested in either the extinction (ABB) or training (ABA) context. We then studied the functional role of PvTh in renewal. Excitotoxic lesions of PvTh prevented renewal. These lesions had no effect on the acquisition of reward seeking. These results show that PvTh mediates context-induced reinstatement and that this renewal is associated with recruitment of a PvTh-AcbSh pathway.
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Affiliation(s)
- Adam S Hamlin
- School of Psychology, The University of New South Wales, Sydney, NSW, Australia
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12
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Jeong JW, Kim KW, Lee DY, Lee SB, Park JH, Choi EA, Choe JY, Do YJ, Ryang JS, Roh HA, Park YS, Choi Y, Woo JI. A normative study of the Revised Hasegawa Dementia Scale: comparison of demographic influences between the Revised Hasegawa Dementia Scale and the Mini-Mental Status Examination. Dement Geriatr Cogn Disord 2007; 24:288-93. [PMID: 17717415 DOI: 10.1159/000107592] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/26/2007] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND/AIMS We investigated the demographic influence on the performance of the Revised Hasegawa Dementia Scale (HDS-R) and provided normative data of the HDS-R in the elderly. METHODS The HDS-R was administered to 803 community-dwelling cognitively normal elderly subjects aged 55 years or over. Cognitive disorders and psychiatric disorders were strictly excluded using the CERAD-K assessment packet and the Mini-International Neuropsychiatric Interview. The demographic influence on the performance of the HDS-R was examined using multiple linear regression analyses, and compared with that on the performance of the Mini-Mental Status Examination (MMSE) using the Chow test and t statistics. Overlapping strata were used in developing age-, education- and gender-specific normative data of the HDS-R. RESULTS Age, education, and gender influenced significantly the performance of the HDS-R, and explained 22.5% of the total score variance. Older age, lower education, and male gender were associated with lower performance of the HDS-R. However, the demographic influence on the HDS-R was much weaker than that on the MMSE (t = 5.578, d.f. = 800, p < 0.001). The normative data of the HDS-R stratified by age (60-69, 70-79, > or =80), education (0-6, 7-12, > or =13), and gender were presented. CONCLUSIONS The HDS-R was more robust to demographic influences than the MMSE, and normative data may contribute to improving further its diagnostic accuracy for dementia.
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Affiliation(s)
- J W Jeong
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Gyeonggi-do, Korea
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Abstract
The molecular mechanisms underlying the chemopreventive effects of NSAIDs are not well understood and remain the subject of debate. One of the mechanistic possibilities involves alterations in gene expression. We examined gene expression profiles in SNU601 gastric cancer cells treated with sulindac sulfide (50 microM) for 24 hr. Microarray analysis showed that 1.3% (105/8170) of genes were induced or repressed more than 3-fold in cells treated with sulindac sulfide. Seven genes were selected and confirmed by reverse transcription-polymerase chain reaction. Inhibitor of differentiation/DNA binding-1 (Id-1) was downregulated in SNU601 cells treated with sulindac sulfide. Id-1 expression level was decreased dose-dependently by sulindac sulfide. In addition, the expression pattern of Id-1 was inversely related to that of nm23. We also examined Id-1 expression in human gastric cancer tissues and compared it with clinicopathologic parameters to study its biologic role in the cancers. Id-1 was frequently and strongly expressed in gastric cancer tissues compared with that in adjacent nonmetaplastic mucosa. Its immunoreactivity scores were positively correlated to Ki67 labeling indices and tumor progression, and is higher in intestinal type than in diffuse type. In summary, a number of genes, both induced and repressed, could be important in mediating sulindac sulfide-induced cell death in gastric cancer cells. Id-1, one of the repressed genes, is upregulated in gastric cancers and has positive role in tumor progression and histogenesis of intestinal-type cancers.
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Affiliation(s)
- Tae Jung Jang
- Department of Pathology, Dongguk University College of Medicine, Kyongju, Kyongbuk 780-714, South Korea.
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Park JH, Lee SB, Lee TJ, Lee DY, Jhoo JH, Youn JC, Choo IH, Choi EA, Jeong JW, Choe JY, Woo JI, Kim KW. Depression in vascular dementia is quantitatively and qualitatively different from depression in Alzheimer's disease. Dement Geriatr Cogn Disord 2007; 23:67-73. [PMID: 17114882 DOI: 10.1159/000097039] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/20/2006] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS To compare the prevalence and characteristics of depression in vascular dementia (VaD) and Alzheimer's disease (AD) after adjusting for dementia severity and gender. METHODS One hundred and eight pairs of VaD and AD patients matched for dementia severity and gender were assessed. RESULTS Major depressive disorder (MDD) was more prevalent in the VaD group than in the AD group (20.4% in VaD, 10.2% in AD, p = 0.04, Cochran-Mantel-Haenszel, CMH, test) regardless of the dementia severity and gender. The odds ratio for developing MDD in the VaD group versus the AD group was estimated to be 2.20 (95% confidence interval = 1.02-4.74). Neurovegetative symptoms such as 'felt tired and weak all the time' (30.6% in VaD, 13.9% in AD, p = 0.003, CMH test) and 'changed weight without trying' (16.7% in VaD, 6.5% in AD, p = 0.02, CMH test) were more prevalent in the VaD group than in the AD group. CONCLUSION Depression in VaD was quantitatively and qualitatively different from that in AD regardless of the severity of dementia and gender; depression was more prevalent, severer and more retarded and vegetative in VaD than in AD.
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Affiliation(s)
- J H Park
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnamsi, Gyeonggido, Korea
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15
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McNally GP, Lee BW, Chiem JY, Choi EA. The midbrain periaqueductal gray and fear extinction: opioid receptor subtype and roles of cyclic AMP, protein kinase A, and mitogen-activated protein kinase. Behav Neurosci 2006; 119:1023-33. [PMID: 16187830 DOI: 10.1037/0735-7044.119.4.1023] [Citation(s) in RCA: 43] [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: 11/08/2022]
Abstract
Four experiments studied the opioid receptor subtype and signal transduction mechanisms mediating fear extinction in the ventrolateral quadrant of the midbrain periaqueductal gray (vlPAG). Microinjection of a mu- but not a delta- or kappa-opioid receptor antagonist into the vlPAG retarded extinction. Extinction was also dose-dependently retarded by vlPAG infusions of a cyclic AMP (cAMP) analog but was unaffected by infusions of a protein kinase A activator or a mitogen-activated protein kinase inhibitor across wide dose ranges. The results show that fear extinction occurs via activation of vlPAG mu-opioid receptors and involves reductions in cAMP. These mechanisms are different from the cellular mechanisms for extinction in the amygdala and from the known cellular mechanisms for opioid analgesia in the vlPAG.
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Affiliation(s)
- Gavan P McNally
- School of Psychology, University of New South Wales, Sydney, NSW, Australia.
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16
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Al-Refaie WB, Choi EA, Tseng JF, Tamm EP, Lee JH, Lee JE, Evans DB, Pisters PWT. Intraductal papillary mucinous neoplasms of the pancreas. Med Princ Pract 2006; 15:245-52. [PMID: 16763389 DOI: 10.1159/000092985] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2005] [Accepted: 01/22/2006] [Indexed: 12/23/2022] Open
Abstract
The introduction of the exocrine pancreatic classification by the World Health Organization and improvements in pancreatic imaging have led to an improved understanding of intraductal papillary mucinous neoplasms (IPMNs) of the pancreas. As a result, IPMNs of the pancreas are increasingly being recognized as a separate disease entity. IPMNs are characterized by the cystic dilatation of the pancreatic duct and its branches, with papillary projections. There are three histological subtypes of IPMNs: main duct, branch duct, and mixed. The degree of atypia ranges from adenoma to frank invasive carcinoma. The lymph nodes are involved considerably less frequently than they are in pancreatic adenocarcinoma. Most patients are symptomatic at diagnosis and require a diagnostic workup similar to that for patients with pancreatic adenocarcinoma. Although some investigators continue to advocate total pancreatectomy, the evidence in support of this is decreasing. Partial pancreatectomy remains the treatment option. Intraoperative assessment of the resection surgical margins is an important component of surgical resection. Additionally, controversy also exists regarding the nature of the follow-up and the need for adjuvant chemoradiation therapy in the patient. Unlike ductal adenocarcinomas, IPMNs follow a relatively indolent course; the 5-year survival rate in patients with invasive IPMNs is 57%. A mural nodule and a main pancreatic duct diameter greater than 5 mm have been found to be predictors of malignancy.
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Affiliation(s)
- W B Al-Refaie
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, 77230, USA
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17
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Blatchford KE, Choi EA, McNally GP. Altered responsivity to central administrations of corticotropin-releasing factor in rats with a history of opiate exposures. Behav Neurosci 2006; 120:1169-74. [PMID: 17014268 DOI: 10.1037/0735-7044.120.5.1169] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/08/2022]
Abstract
The authors studied the effects of a history of opiate exposures on behavioral responses to intracerebroventricular (ICV) microinjections of the stress-related peptide corticotropin-releasing factor (CRF). Rats were injected for 10 days with morphine (10 mg/kg) or saline, and 1 or 7 days later they received an ICV microinjection of CRF (0.5 microg or 2.5 microg) or artificial cerebrospinal fluid. Microinjections of CRF produced anxiety-like behavior, locomotor activity, and self-grooming. The anxiogenic response was altered so that morphine-treated rats showed reduced responses to 0.5-microg CRF but showed exaggerated responses to 2.5-microg CRF 1 or 7 days after last opiate exposure. These findings suggest that alterations in central CRF circuits may underpin the increased vulnerability to anxiety observed following opiate exposures.
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Affiliation(s)
- Kate E Blatchford
- School of Psychology, University of New South Wales, Sydney, NSW, Australia
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18
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Choi EA, Leman S, Vianna DML, Waite PME, Carrive P. Expression of cardiovascular and behavioural components of conditioned fear to context in T4 spinally transected rats. Auton Neurosci 2005; 120:26-34. [PMID: 15996622 DOI: 10.1016/j.autneu.2004.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2004] [Revised: 08/23/2004] [Accepted: 08/27/2004] [Indexed: 10/25/2022]
Abstract
A spinal cord transection at the fourth thoracic level (T4) results in paraplegia. It also removes supraspinal control of sympathetic outflow to most viscera and their blood vessels but spares the heart. We studied the effects of such a transection on the expression of the conditioned fear response to context, which includes freezing, 22 kHz ultrasonic vocalisations, a marked pressor response and a slowly rising tachycardia. Rats implanted with radiotelemetric probes were fear conditioned, tested, then transected at T4 and finally re-tested 4 weeks after transection. Baseline blood pressure in transected animals was the same as in intact animals but baseline heart rate was 127 bpm higher. There were clear signs of fear in the transected animals: although freezing occurred in the upper part of the body only, there was a 3 fold increase in the number of ultrasonic vocalisations, most probably due to paralysis of abdominal muscles that made expirations shorter and therefore more frequent. The pressor response of fear was initially the same as in intact animals but controls revealed that this was due to handling during transfer to the aversive context. The rest of the pressor response was markedly reduced (70%) confirming that it depends in large part on a sympathetically mediated increase in vascular resistance in the lower part of the body. The cardiac response was characterized by an initial bradycardia followed by a marked tachycardia, which is consistent with a baroreceptor-mediated reflex response to the altered pressor changes. Finally, none of these changes was observed when the same experiment was repeated in sham transected animals. Thus, the pressor response of fear is in large part mediated by the thoracic cord below T4 and the baroreflex is not inhibited but maintained during conditioned fear.
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Affiliation(s)
- Eun A Choi
- Department of Anatomy, School of Medical Sciences, University of New South Wales, NSW 2052, Sydney, Australia
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19
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Abstract
BACKGROUND We surveyed single-center and multi-center studies pertaining to sentinel lymph node biopsy (SLNB) after neoadjuvant chemotherapy to compare the results with those of our current study to evaluate the feasibility and accuracy of SLNB after neoadjuvant chemotherapy. METHODS From October 2001 to July 2003, 80 patients who had neoadjuvant chemotherapy underwent curative surgery and axillary lymph node dissection (ALND) after SLNB at the Center for Breast Cancer, National Cancer Center. A MEDLINE search was performed using the keywords breast cancer, sentinel lymph node biopsy, and neoadjuvant chemotherapy. RESULTS Our results showed that 42 (52.6%) of 80 patients had downstaging of the primary tumor; 9 patients (11.3%) had pathologic complete response (pCR) and 33 (41.3%) had pathologic partial response (pPR). 26 patients (32.5%) showed complete axillary clearance after neoadjuvant chemotherapy. Among them, 5 patients (6.3%) revealed pCR of both the primary tumor and axillary metastasis. SLNB was successful in 61 of 80 patients (76.3%) and there were 3 false negatives, yielding a false negative rate (FNR) of 7.3% (3/41), a negation prediction value (NPV) of 87.0%(20/23), and an accuracy of 95.1% (58/61). Thirteen out of 16 studies retrieved by to MEDLINE pertaining SLNB after neoadjuvant chemotherapy concluded its feasibility and accuracy with a identification rate of 82%-100% and a FNR of 17-100%. CONCLUSION Most studies, including ours, concluded that SLNB after neoadjuvant chemotherapy is accurate and could be an alternative to ALND.
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Affiliation(s)
- Seok Hyung Kang
- National Cancer Center, Madu-1-dong 809,san-gu, Goyang-si, Gyeonggi-do, 411-769, Korea.
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20
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Chung HW, Wen Y, Choi EA, Moon HS, Yu HK, Polan ML. Pleiotrophin (PTN) and midkine (MK) mRNA expression in eutopic and ectopic endometrium in advanced stage endometriosis. Mol Hum Reprod 2002; 8:350-5. [PMID: 11912283 DOI: 10.1093/molehr/8.4.350] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [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: 11/12/2022] Open
Abstract
Endometriosis is characterized by the ectopic implantation of endometrium on peritoneal surfaces. Angiogenic and growth factors may play a significant role in the pathogenesis of endometriosis. Midkine (MK) and pleiotrophin (PTN) are two related peptides associated with carcinogenesis and angiogenesis. To test the hypothesis that a higher expression of MK and PTN in ectopic and eutopic endometrium from women with endometriosis might favour increased angiogenesis and growth with subsequent ectopic implantation, we investigated PTN and MK expression by quantitative competitive PCR (QC-PCR) in endometrium from 30 women with severe, stages III and IV endometriosis and from 30 women without endometriosis. Total RNA was extracted and reverse transcribed into cDNA, and QC-PCR was performed to evaluate PTN and MK mRNA expression. Results were analysed by analysis of variance. Eutopic endometrium from endometriosis patients showed increased expression of MK and PTN mRNA compared with endometrium from normal women in the luteal phase (P < 0.05). MK and PTN mRNA expression in ectopic endometrium was significantly lower than that in eutopic endometrium from women with and without endometriosis (P < 0.05). Our results suggest increased MK and PTN expression may be related to the initiation of ectopic endometrial implants and peritoneal invasion.
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Affiliation(s)
- Hye Won Chung
- Department of Obstetrics and Gynecology, Ewha Womans University School of Medicine, Seoul, Korea.
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21
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Tada H, Maron DJ, Choi EA, Barsoum J, Lei H, Xie Q, Liu W, Ellis L, Moscioni AD, Tazelaar J, Fawell S, Qin X, Propert KJ, Davis A, Fraker DL, Wilson JM, Spitz FR. Systemic IFN-beta gene therapy results in long-term survival in mice with established colorectal liver metastases. J Clin Invest 2001; 108:83-95. [PMID: 11435460 PMCID: PMC209332 DOI: 10.1172/jci9841] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Most patients succumbing to colorectal cancer fail with liver-predominant metastases. To make a clinical impact in this disease, a systemic or whole-liver therapy may be required, whereas most cancer gene therapy approaches are limited in their ability to treat beyond local disease. As a preclinical model for cancer gene therapy, recombinant adenovirus containing the human IFN-beta (hIFN-beta) cDNA was delivered systemically in nude mouse xenograft models of human colorectal cancer liver metastases. The vector targeted hepatocytes that produced high levels of hIFN-beta in the liver, resulting in a profound apoptotic response in the tumors and significant tumor regression. hIFN-beta gene therapy not only resulted in improved survival and long-term cure in a micrometastatic model, but provided similar benefits in a clinically relevant gross disease model. A similar recombinant adenovirus containing the murine IFN-beta (mIFN-beta) cDNA also resulted in a therapeutic response and improved survival in syngeneic mouse models of colorectal cancer liver metastases. Depletion studies demonstrate a contribution of natural killer cells to this therapeutic response. The toxicity of an adenoviral vector expressing murine IFN-beta in a syngeneic model is also presented. These encouraging results warrant further investigation of the use of cancer gene therapy for targeting metastatic disease.
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MESH Headings
- Adenocarcinoma/drug therapy
- Adenocarcinoma/secondary
- Adenocarcinoma/therapy
- Adenoviridae/genetics
- Animals
- Apoptosis
- Colorectal Neoplasms/pathology
- Cytomegalovirus/genetics
- DNA, Complementary/administration & dosage
- DNA, Complementary/genetics
- DNA, Complementary/therapeutic use
- DNA, Complementary/toxicity
- Female
- Genes, Synthetic
- Genetic Therapy
- Genetic Vectors/administration & dosage
- Genetic Vectors/genetics
- Genetic Vectors/therapeutic use
- Genetic Vectors/toxicity
- Hepatocytes/metabolism
- Humans
- Injections, Intraperitoneal
- Injections, Intravenous
- Interferon-beta/administration & dosage
- Interferon-beta/genetics
- Interferon-beta/therapeutic use
- Interferon-beta/toxicity
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Liver Neoplasms/drug therapy
- Liver Neoplasms/secondary
- Liver Neoplasms/therapy
- Macrophages/drug effects
- Macrophages/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Mice, SCID
- Neoplasm Transplantation
- Neovascularization, Pathologic/drug therapy
- Neovascularization, Pathologic/therapy
- Promoter Regions, Genetic
- Recombinant Fusion Proteins/administration & dosage
- Recombinant Fusion Proteins/physiology
- Recombinant Fusion Proteins/therapeutic use
- Recombinant Fusion Proteins/toxicity
- Tumor Cells, Cultured/transplantation
- Xenograft Model Antitumor Assays
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Affiliation(s)
- H Tada
- Department of Surgery, Division of Surgical Oncology, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19104, USA
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22
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Moon HS, Choi EA, Park HY, Choi JY, Chung HW, Kim JI, Park WI. Expression and Tyrosine Phosphorylation of E-Cadherin, β- and γ-Catenin, and Epidermal Growth Factor Receptor in Cervical Cancer Cells. Gynecol Oncol 2001; 81:355-9. [PMID: 11371122 DOI: 10.1006/gyno.2001.6163] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The cadherin/catenin adhesion complex is fundamentally involved in epithelial cancer invasion and metastasis. Much evidence suggesting that epidermal growth factor (EGF) induced the scattering and invasion of cancer cells, probably by affecting E-cadherin function, has been reported. The present study aimed to confirm the hypothesis that EGF/epidermal growth factor receptor (EGFR) was related with the E-cadherin adhesion system in cervical cancer cells and that EGF might induce tyrosine phosphorylation of beta- and gamma-catenin. METHODS Cervical cancer cells were treated for different time durations with 30 ng/ml of EGF. Alteration of the cell morphology was examined by light microscopy and the expression of E-cadherin, beta-catenin, gamma-catenin, EGFR, and activated EGFR was assayed using Western blotting. Tyrosine phosphorylation of beta- and gamma-catenin was also examined using immunoprecipitation. RESULTS E-cadherin and EGFR were expressed in CaSki, HT-3, and ME-180 cell lines, which showed epithelial contact growth. The expression of E-cadherin and beta- and gamma-catenin did not change after treatment with EGF. The expression of EGFR decreased and activated EGFR expression increased in 30 min and then decreased subsequently. The simultaneous expression of activated EGFR and tyrosine phosphorylation of beta- and gamma-catenin was found. CONCLUSIONS EGF-induced scattering of the E-cadherin-positive cervical cancer cells might be the result of tyrosine phosphorylation of the beta- and gamma-catenin. Phosphorylation of the beta- and gamma-catenin may hamper the adhesive function of the E-cadherin-catenin complex.
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Affiliation(s)
- H S Moon
- Department of Obstetrics and Gynecology, Ewha Womans University, Seoul, 158-710, Korea
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23
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Maron DJ, Choi EA, Spitz FR. Gene therapy of metastatic disease: progress and prospects. Surg Oncol Clin N Am 2001; 10:449-60, xi. [PMID: 11382597] [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: 02/20/2023]
Abstract
Gene therapy remains a new and exciting therapy that holds the potential to impact the care of many diseases. Cancer gene therapy strategies encompass a major part of this developing field. Initial preclinical and phase I clinical trials have demonstrated the ability to transfer genetic material to cells in vitro and in vivo with resultant expression of biologically active protein. Most of these studies have involved direct injection or local installation of vector. A majority of patients succumbing to cancer do so because of metastatic disease. Clearly, to broaden the impact of cancer gene therapy on these patients' outcome, new strategies for targeting regional or systemic disease are required. This article offers a review of current vectors and therapeutic strategies along with the application of these in human cancers.
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Affiliation(s)
- D J Maron
- Division of Surgical Oncology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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24
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Nahm DH, Yim H, Lee HJ, Yim EJ, Choi EA, Kim SS, Lee SK, Park HS. Presence of circulating autoantibodies against bronchial epithelia cell in patients with nonatopic asthma. J Korean Med Sci 2000; 15:631-4. [PMID: 11194188 PMCID: PMC3054709 DOI: 10.3346/jkms.2000.15.6.631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Allergic response to common environmental agents has been regarded as a main pathogenetic mechanism of bronchial asthma. However, allergic sensitization (atopy) can not be detected in a siginificant number of adult asthmatic patients. The etiology of nonatopic asthma has not yet been defined. To evaluate the possible involvement of autoimmune response against bronchial mucosa in the pathogenesis of nonatopic asthma, we performed indirect immunofluorescence staining of fresh frozen human bronchial mucosa tissue using serum samples from patients with atopic and nonatopic asthma, healthy controls, and patients with systemic lupus erythematosus. On immunostaining, circulating IgG autoantibodies against bronchial mucosa were detected in 2 (9.1%) of 22 patients with nonatopic asthma and in none of 22 patients with atopic asthma and of 22 healthy controls. IgG autoantibodies from the two patients with nonatopic asthma predominantly stained the cytoplasmic membrane of basal cells in bronchial epithelium. Serum samples from 10 patients with systemic lupus erythematosus immunostained the nucleus of epithelial cells in whole layer of bronchial epithelium. This study showed the presence of circulating IgG autoantibodies against the bronchial epithelial cell in a small portion of patients with nonatopic asthma. Further studies may be necessary to evaluate the possible involvement of autoimmune mechanism in the pathogenesis of nonatopic asthma.
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Affiliation(s)
- D H Nahm
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
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25
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Park JH, Choi EA, Cho EW, Lee YJ, Park JM, Na SY, Kim KL. Detection of cellular receptors specific for the hepatitis B virus preS surface protein on cell lines of extrahepatic origin. Biochem Biophys Res Commun 2000; 277:246-54. [PMID: 11027670 DOI: 10.1006/bbrc.2000.3661] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Hepatitis B virus infection is primarily mediated by the interaction of the preS region of the viral envelope protein with its still unknown cellular receptor. Using recombinantly expressed preS proteins, the distribution of preS-binding receptors on cell lines from extrahepatic origins was determined by immunofluorescence and flow cytometry. In contrast to human liver cell lines, most cell lines from extrahepatic origins did not bind preS proteins. Nevertheless, exceptions were found in the bone marrow-derived cell line, KG-1, and the osteogenic sarcoma cell line SaOS-2, as well as in the previously reported EBV-transformed B-cell line, Wa. To determine the biochemical nature of these receptors, Wa-cells were cell surface biotinylated and the preS-binding receptors were isolated by immunoprecipitation. A specific band with a molecular weight of approximately 30 kDa was identified in a SDS-polyacrylamide gel, which further characterization is expected to provide clues regarding the infection mechanism of HBV in hepatic- and extra-hepatic cells.
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Affiliation(s)
- J H Park
- Protein Engineering Laboratory, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yusong, Taejon, 305-600, South Korea
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26
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Park JH, Choi EA, Cho EW, Hahm KS, Kim KL. Maltose binding protein (MBP) fusion proteins with low or no affinity to amylose resins can be single-step purified using a novel anti-MBP monoclonal antibody. Mol Cells 1998; 8:709-16. [PMID: 9895124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
The maltose binding protein (MBP) fusion protein expression system is a powerful tool to produce and isolate recombinant proteins in E. coli. Whereas the conventional isolation technique for MBP-fusion proteins takes advantage of the binding affinity of MBP to maltose, this method is limited insofar as the biological activity of MBP has to be fully conserved for a successful purification. In this study, a novel monoclonal antibody (mAb) specific for MBP, termed HAM-19, was generated and its application in the purification and detection of MBP-fusion proteins determined. Using anti-MBP immunoaffinity columns, even recombinant MBP fusion products with lowered or impaired binding affinity to maltose were purified in a single step procedure. In comparison to amylose resins, HAM-19 immunoaffinity columns showed a higher binding capacity and affinity to MBP-fusion proteins. Furthermore, the mAb HAM-19 also provides a technical improvement over polyclonal antisera for the detection and analysis of MBP-fusion proteins which are under use in various forms in the fields of molecular and cellular biology.
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Affiliation(s)
- J H Park
- Peptide Engineering Research Unit, Korea Research Institute of Bioscience and Biotechnology, KIST, Taejon
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