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Jang IK, Yoon HH, Yang MS, Lee JE, Lee DH, Lee MW, Kim DS, Park JE. B7-H1 inhibits T cell proliferation through MHC class II in human mesenchymal stem cells. Transplant Proc 2015; 46:1638-41. [PMID: 24935340 DOI: 10.1016/j.transproceed.2013.12.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 12/16/2013] [Indexed: 12/26/2022]
Abstract
B7-H1 on mesenchymal stem cells (MSCs) is known to modulate immune response. However, its expression pattern and exact immunomodulatory mechanism are unclear. In this study, we examined the immunomodulatory mechanism through the expression pattern of B7-H1 and major histocompatibility complex class II in various MSCs. Human bone marrow, adipose tissue, and cord blood MSCs were isolated and cultured. B7-H1, HLA-ABC, and HLA-DR expression on MSCs by interferon-γ (IFN-γ) was detected time-dependently by flow cytometry. The inhibitory effect of MSCs on T lymphocytes was observed in phytohemagglutinin antigen-induced T cell proliferation assay. The expression of B7-H1 was rapidly induced, but the expression of HLA-DR was induced at 48 hours after IFN-γ treatment. The inhibitory effect of MSCs on T cell proliferation could be restored when the anti-B7-H1 monoclonal antibody was used to block the B7-H1, or when the HLA-DRα small interfering RNA was used to interfere with its expression. These results show that MSCs could inhibit the T cell proliferation and activation by B7-H1 depending on the presence of HLA-DR. Therefore, MSCs would have a strong effect on immune diseases such as graft-versus-host disease and autoimmune diseases when MSCs are primed with IFN-γ 48 hours before transplantation.
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Lee JE, Kahana E, Kahana B, Barnes K. Positive affect, depressive symptoms, and arthritis pain of elderly people over time. HEALTHY AGING RESEARCH 2015; 4:16. [PMID: 29399574 PMCID: PMC5792073 DOI: 10.12715/har.2015.4.16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND Older adults frequently experience physical symptoms of arthritis pain. We examined the dynamic change of arthritis pain and depressive symptoms over time. We also addressed the influence of time varying arthritis pain on depressive symptoms and positive affect among community dwelling older individuals. METHODS Analyses were based on data from 4 annual follow-ups in a sample of 299 elderly residents (M=83.78) of Florida retirement communities. We estimated a hierarchical growth curve model that related the effects of time varying pain and characteristics of participants such as age, gender, cognitive functioning, emotional support and health. Growth curve modeling was used to assess changes in emotional well-being as a function of arthritis pain over time. RESULTS We found that depressive symptoms increased over 4 years whereas positive affect declined over 4 years with significant between-person differences in levels and slopes. As predicted, changes in arthritis pain co-varied with both depressive symptoms and positive affect over time. Gender, cognitive functioning, health conditions and emotional support from others were associated with between person differences in level of emotional well-being. CONCLUSIONS Our findings suggest that conceptualization of emotional well-being of older adults as a dynamic, changing construct applies both depressive symptoms and positive affect. Findings also suggest that arthritis pain as well as emotional support contribute to depressive symptoms and to positive affect among older adults with arthritis.
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Westrate LM, Lee JE, Prinz WA, Voeltz GK. Form follows function: the importance of endoplasmic reticulum shape. Annu Rev Biochem 2015; 84:791-811. [PMID: 25580528 DOI: 10.1146/annurev-biochem-072711-163501] [Citation(s) in RCA: 266] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The endoplasmic reticulum (ER) has a remarkably complex structure, composed of a single bilayer that forms the nuclear envelope, along with a network of sheets and dynamic tubules. Our understanding of the biological significance of the complex architecture of the ER has improved dramatically in the last few years. The identification of proteins and forces required for maintaining ER shape, as well as more advanced imaging techniques, has allowed the relationship between ER shape and function to come into focus. These studies have also revealed unexpected new functions of the ER and novel ER domains regulating alterations in ER dynamics. The importance of ER structure has become evident as recent research has identified diseases linked to mutations in ER-shaping proteins. In this review, we discuss what is known about the maintenance of ER architecture, the relationship between ER structure and function, and diseases associated with defects in ER structure.
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Kim JY, Yenari MA, Lee JE. Regulation of inflammatory transcription factors by heat shock protein 70 in primary cultured astrocytes exposed to oxygen-glucose deprivation. Neuroscience 2014; 286:272-80. [PMID: 25485480 DOI: 10.1016/j.neuroscience.2014.11.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 11/13/2014] [Accepted: 11/26/2014] [Indexed: 01/28/2023]
Abstract
Inflammation is an important event in ischemic injury. These immune responses begin with the expression of pro-inflammatory genes modulating transcription factors, such as nuclear factor-κB (NF-κB), activator protein-1 (AP-1), and signal transducers and activator of transcription-1 (STAT-1). The 70-kDa heat shock protein (Hsp70) can both induce and arrest inflammatory reactions and lead to improved neurological outcome in experimental brain injury and ischemia. Since Hsp70 are induced under heat stress, we investigated the link between Hsp70 neuroprotection and phosphorylation of inhibitor of κB (IκB), c-Jun N-terminal kinases (JNK) and p38 through co-immunoprecipitation and enzyme-linked immunosorbent assay (ELISA) assay. Transcription factors and pro-inflammatory genes were quantified by immunoblotting, electrophoretic-mobility shift assay and reverse transcription-polymerase chain reaction assays. The results showed that heat stress led to Hsp70 overexpression which rendered neuroprotection after ischemia-like injury. Overexpression Hsp70 also interrupts the phosphorylation of IκB, JNK and p38 and blunts DNA binding of their transcription factors (NF-κB, AP-1 and STAT-1), effectively downregulating the expression of pro-inflammatory genes in heat-pretreated astrocytes. Taken together, these results suggest that overexpression of Hsp70 may protect against brain ischemia via an anti-inflammatory mechanism by interrupting the phosphorylation of upstream of transcription factors.
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Ahn SS, Kim SH, Lee JE, Ahn KJ, Kim DJ, Choi HS, Kim J, Shin NY, Lee SK. Effects of agmatine on blood-brain barrier stabilization assessed by permeability MRI in a rat model of transient cerebral ischemia. AJNR Am J Neuroradiol 2014; 36:283-8. [PMID: 25273536 DOI: 10.3174/ajnr.a4113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE BBB disruption after acute ischemic stroke and subsequent permeability increase may be enhanced by reperfusion. Agmatine has been reported to attenuate BBB disruption. Our aim was to evaluate the effects of agmatine on BBB stabilization in a rat model of transient cerebral ischemia by using permeability dynamic contrast-enhanced MR imaging at early stages and subsequently to demonstrate the feasibility of dynamic contrast-enhanced MR imaging for the investigation of new therapies. MATERIALS AND METHODS Thirty-four male Sprague-Dawley rats were subjected to transient MCA occlusion for 90 minutes. Immediately after reperfusion, agmatine (100 mg/kg) or normal saline was injected intraperitoneally into the agmatine-treated group (n = 17) or the control group, respectively. MR imaging was performed after reperfusion. For quantitative analysis, regions of interest were defined within the infarct area, and values for volume transfer constant, rate transfer coefficient, volume fraction of extravascular extracellular space, and volume fraction of blood plasma were obtained. Infarct volume, infarct growth, quantitative imaging parameters, and numbers of factor VIII-positive cells after immunohistochemical staining were compared between control and agmatine-treated groups. RESULTS Among the permeability parameters, volume transfer constant and volume fraction of extravascular extracellular space were significantly lower in the agmatine-treated group compared with the control group (0.05 ± 0.02 minutes(-1) versus 0.08 ± 0.03 minute(-1), P = .012, for volume transfer constant and 0.12 ± 0.06 versus 0.22 ± 0.15, P = .02 for volume fraction of extravascular extracellular space). Other permeability parameters were not significantly different between the groups. The number of factor VIII-positive cells was less in the agmatine-treated group than in the control group (3-fold versus 4-fold, P = .037). CONCLUSIONS In ischemic stroke, agmatine protects the BBB, which can be monitored in vivo by quantification of permeability by using dynamic contrast-enhanced MR imaging. Therefore, dynamic contrast-enhanced MR imaging may serve as a potential imaging biomarker for assessing the BBB stabilization properties of pharmacologic agents.
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Won SG, Cho WS, Lee JE, Park KH, Ra CS. Data Build-up for the Construction of Korean Specific Greenhouse Gas Emission Inventory in Livestock Categories. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 27:439-46. [PMID: 25049972 PMCID: PMC4093265 DOI: 10.5713/ajas.2013.13401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 12/23/2013] [Accepted: 08/24/2013] [Indexed: 11/27/2022]
Abstract
Many studies on methane (CH4) and nitrous oxide (N2O) emissions from livestock industries have revealed that livestock production directly contributes to greenhouse gas (GHG) emissions through enteric fermentation and manure management, which causes negative impacts on animal environment sustainability. In the present study, three essential values for GHG emission were measured; i.e., i) maximum CH4 producing capacity at mesophilic temperature (37°C) from anaerobically stored manure in livestock category (B0,KM, Korean livestock manure for B0), ii) EF3(s) value representing an emission factor for direct N2O emissions from manure management system S in the country, kg N2O-N kg N−1, at mesophilic (37°C) and thermophilic (55°C) temperatures, and iii) Nex(T) emissions showing annual N excretion for livestock category T, kg N animal−1 yr−1, from different livestock manure. Static incubation with and without aeration was performed to obtain the N2O and CH4 emissions from each sample, respectively. Chemical compositions of pre- and post-incubated manure were analyzed. Contents of total solids (% TS) and volatile solid (% VS), and the ratio of carbon to nitrogen (C/N) decrease significantly in all the samples by C-containing biogas generation, whereas moisture content (%) and pH increased after incubation. A big difference of total nitrogen content was not observed in pre- and post-incubation during CH4 and N2O emissions. CH4 emissions (g CH4 kg VS−1) from all the three manures (sows, layers and Korean cattle) were different and high C/N ratio resulted in high CH4 emission. Similarly, N2O emission was found to be affected by % VS, pH, and temperature. The B0,KM values for sows, layers, and Korean cattle obtained at 37°C are 0.0579, 0.0006, and 0.0828 m3 CH4 kg VS−1, respectively, which are much less than the default values in IPCC guideline (GL) except the value from Korean cattle. For sows and Korean cattle, Nex(T) values of 7.67 and 28.19 kg N yr−1, respectively, are 2.5 fold less than those values in IPCC GL as well. However, Nex(T) value of layers 0.63 kg N yr−1 is very similar to the default value of 0.6 kg N yr−1 in IPCC GLs for National greenhouse gas inventories for countries such as South Korea/Asia. The EF3(s) value obtained at 37°C and 55°C were found to be far less than the default value.
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Lee J, Yun GS, Lee JE, Kim M, Choi MJ, Lee W, Park HK, Domier CW, Luhmann NC, Sabbagh SA, Park YS, Lee SG, Bak JG. Toroidal mode number estimation of the edge-localized modes using the KSTAR 3-D electron cyclotron emission imaging system. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:063505. [PMID: 24985817 DOI: 10.1063/1.4883180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new and more accurate technique is presented for determining the toroidal mode number n of edge-localized modes (ELMs) using two independent electron cyclotron emission imaging (ECEI) systems in the Korea Superconducting Tokamak Advanced Research (KSTAR) device. The technique involves the measurement of the poloidal spacing between adjacent ELM filaments, and of the pitch angle α* of filaments at the plasma outboard midplane. Equilibrium reconstruction verifies that α* is nearly constant and thus well-defined at the midplane edge. Estimates of n obtained using two ECEI systems agree well with n measured by the conventional technique employing an array of Mirnov coils.
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Bae SY, Han JH, Kim S, Lee SK, Lee JH, Lee HC, Kim M, Kim J, Kil WH, Kim SW, Lee JE, Nam SJ. Abstract P2-09-19: Zerumbone suppresses IL-1b-induced cell migration and invasion through inhibition of IL-8 expression and MMP3 expression in human triple negative breast cancer cells. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-09-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Inflammation is a key regulatory process in breast cancer progression and severity. Several studies have demonstrated that prolonged exposure of breast tumor cells to inflammatory cytokines leads to epithelial-mesenchymal transitions (EMT), which is the principle mechanism involved in metastasis and tumor invasion. Disruption of the signaling pathways involved in EMT may therefore provide an effective treatment strategy for currently difficult to treat or untreatable cancers such as TNBC. The interleukin (IL)-1 plays a pivotal role on breast cancer proliferation, invasion and/or inflammation. Here, we investigated the correlation of MMP-3 and IL-8 on IL-1b-induced cell migration and invasion as well as the inhibitory effect of zerumbone on IL-1β-induced MMP-3 and IL-8.
Methods: Triple negative breast cancer cells (Hs578T and MDA-MB231) were cultured DMEM with 10% FBS and 1% antibiotics. The levels of IL-8 and MMP-3 mRNA were analyzed by real-time PCR. The levels of secreted IL-8 and MMP-3 protein expression were analyzed by ELISA and western blot analysis, respectively. Cell viabilities by drug were analyzed by MTT assay. Cell invasion and migration was detected by Boyden chamber assay.
Results: The level of IL-8 and MMP-3 mRNA and protein expression significantly increased by IL-1β treatment in both Hs578T cells and MDA-MB231 cells. In addition, IL-1β-induced cell migration and invasion also increased in Hs578T and MDA-MB231 cells. On the other hand, the levels of basal and IL-1β-induced IL-8 and MMP-3 expression were decreased by zerumbone.
Conclusion: IL-1β induces the migration and invasion of breast cancer cells through IL-8 and MMP-3 expression. These effects are significantly suppressed by zerumbone. Therefore, we suggest that zerumbone may act as a useful therapeutic agent for treatment of triple negative breast cancer.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-09-19.
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Bae SY, Lee SK, Lee JH, Lee H, Kim M, Kim J, Kil WH, Lee JE, Nam SJ. Abstract P5-09-17: Prognostic significance of progesterone receptor in hormonal receptor-positive breast cancer: Association with endocrine resistance. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-09-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Endocrine therapy has dramatic improvements of prognosis in patients with hormonal receptor positive breast cancer. However, long-term follow up shows that endocrine resistance is still major clinical concern. Although the value of estrogen receptor (ER) level can predict response to endocrine treatment in hormonal receptor positive breast cancers, few markers are available that can predict response to endocrine treatment. We attempted to identify molecular markers, especially progesterone receptor (PR), associated with endocrine failure in breast cancer.
Methods: We reviewed the medical records of 2513 breast cancer patients who underwent breast surgery and endocrine therapy at Samsung Medical Center between March 2007 and July 2011. Patients were compared according to ER and PR expression and to assess the clinical and biological features of ER+positive/PR-negative breast cancers to understand how PR might be a useful marker of these activities. ER and PR expression accessed using Allred score, the ‘positive” was defined that total score is larger than 2.
Results PR negative tumors were found more frequently in postmenopausal women (post- 11.2% vs. pre- 2.5%, P < 0.001) and PR negative tumors were significantly associated with higher grade, higher level of Ki 67 and more expression of EGFR and CK5/6. In Kaplan-Meier analysis and multivariate analysis, PR negativity was significantly poorer prognostic factor of DFS (HR 3.1, 95% CI 1.2-8.2, P = 0.021) and OS (HR 89.8, 95% CI 3.4-2352.3, P = 0.007). Stratified by the menopausal status, there was not shown significant difference of survival between the PR+ and PR- tumor in postmenopausal women (DFS, HR 2.1, 95% CI 0.4-10.8, P = 0.381; OS, HR 10.6, 95% CI 0.6-171.4, P = 0.096). However, PR negative tumors showed an association with poor outcome in premenopausal women (DFS, HR 7.2, 95% CI 2.5-20.6, P <0.001; OS, HR 24.6, 95% CI 2.2-275.6, P = 0.009).
Conclusion: In HR positive breast cancers, PR negative tumors were found more frequently in elderly, postmenopausal women. However, PR negative tumors are shown more aggressive and poorer survival than PR positive tumors despite of endocrine therapy, especially in premenopausal women.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-09-17.
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Lee HC, Lee JH, Kim MK, Kil WH, Kim J, Lee JE, Kim SW, Nam SJ, Kim SM, Bae SY, Lee SK, Kim J. Abstract P2-18-04: No further axillary dissection in sentinel lymph node-negative breast cancer after neoadjuvant chemotherapy in patients with initial cytologically-proven axillary node metastasis. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-18-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
In patients with fine needle aspiration (FNA)-proven axillary lymph node metastasis at diagnosis (cN+), the current standard surgical procedure is axillary lymph node dissection (ALND) at definitive surgery after neoadjuvant chemotherapy (NAC). However, growing evidences suggest that SLNB after NAC is feasible and may demonstrate acceptable performance in selected patients. We performed sentinel lymph node biopsy in patients treated with cytologically-confirmed axillary lymph nodes metastases at presentation, who converted to a clinically negative axillary status after NAC (ycN0).
Patients and methods
We retrospectively evaluated 240 patients with invasive breast cancer with ultrasound-guided FNA-proven axillary nodal metastases at the time of diagnosis. All patients received NAC and underwent surgery at Samsung medical center between October 2007 and May 2013. Among these patients, 75 patients underwent SLNB. These patients converted to clinically node-negative disease (ycN0) after NAC on breast MRI or PET/CT scan. A combined detection technique was used with radioisotope and blue dye for the detection of SLN. Patients with negative SLN on frozen pathology and low clinical suspicion of metastasis during operation were not performed further ALND.
Results
The detection rate of SLNB was 93.3% (70/75), and median number of retrieved sentinel lymph nodes was 3.0 (range 1-8). False negative rate was 6.7% (1/15). Of these 75 patients, 35 (46.6%) patients had positive sentinel lymph nodes (ypN+) and underwent ALND. Thirty-five (46.6%) patients had tumor-free sentinel lymph nodes (ypN0sn) and 20 patients of them were followed without subsequent ALND. In these SLN-negative patients without further ALND, 9 patients were HER2-enriched subtypes and 9 patients, TNBC subtypes. Only two of them were Luminal B subtypes. The median follow-up period was 12.0 months (range 0-26 months) with 2 events; 1 regional recurrence in ipsilateral supraclavicular node and 1 systemic recurrence in brain on postoperative 7 months and 5 months, respectively. There has not occurred an ipsilateral axillary recurrence so far.
Conclusions Although the follow-up was not long enough to conclude, this study tried to demonstrate that SLNB after NAC was feasible and further ALND may not be necessary in patients with SLN-negative disease (ypN0sn).
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-18-04.
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Lee SK, Yang JH, Woo SY, Lee JE, Nam SJ. Nomogram for predicting invasion in patients with a preoperative diagnosis of ductal carcinoma in situ of the breast. Br J Surg 2013; 100:1756-63. [DOI: 10.1002/bjs.9337] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2013] [Indexed: 11/08/2022]
Abstract
Abstract
Background
The aim of this study was to identify risk factors for invasive breast cancer in patients diagnosed with ductal carcinoma in situ (DCIS) on a preoperative biopsy. These factors were used to develop a nomogram for predicting the risk of invasion in the preoperative setting.
Methods
This was a retrospective analysis of patients who underwent surgical treatment for DCIS diagnosed before surgery between 1997 and 2009. Multivariable analysis was used to identify clinical, radiological and histopathological factors that may predict upstaging. A nomogram was developed to predict the probability of invasion using multiple logistic regression analysis. This nomogram was subsequently validated using another cohort of patients with a preoperative diagnosis of DCIS between 2010 and 2012.
Results
Upstaging to invasive cancer occurred in 123 (24.9 per cent) of 493 women treated between 1997 and 2009. A larger DCIS lesion (at least 15 mm), lack of hormone receptor expression, intermediate or high nuclear grade, diagnosis on core biopsy compared with vacuum-assisted biopsy, and non-cribriform subtype of DCIS were significantly associated with upstaging. A nomogram developed using these factors demonstrated good predictive performance (area under the receiver operating characteristic (ROC) curve (AUC) 0·823, 95 per cent confidence interval 0·787 to 0·860). The nomogram showed similar predictive performance in the validation data set, based on another 149 women (AUC 0·700, 0·613 to 0·786).
Conclusion
Upstaging to invasive cancer in women with a preoperative diagnosis of DCIS is common. A nomogram based on the five most significant factors related to upstaging accurately predicted invasive cancer. This nomogram may be useful when deciding whether to pursue axillary staging with sentinel lymph node biopsy in patients with DCIS.
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Kim HW, Lee JE, Cha JJ, Hyun YY, Kim JE, Lee MH, Song HK, Nam DH, Han JY, Han SY, Han KH, Kang YS, Cha DR. Fibroblast growth factor 21 improves insulin resistance and ameliorates renal injury in db/db mice. Endocrinology 2013; 154:3366-76. [PMID: 23825123 DOI: 10.1210/en.2012-2276] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Despite the emerging importance of fibroblast growth factor 21 (FGF21) as a metabolic hormone regulating energy balance, its direct effects on renal function remain unexplored. FGF21 was injected ip daily for 12 weeks into db/db mice. Compared with control vehicle injection, FGF21 treatment significantly improved lipid profiles and insulin resistance and resulted in significantly higher serum adiponectin levels. In contrast, serum insulin and 8-isoprostane levels were significantly decreased. Interestingly, FGF21 and its receptor components in the kidneys were found to be significantly up-regulated in db/db mice, which suggests an FGF21-resistant state. FGF21 treatment significantly down-regulated FGF21 receptor components and activated ERK phosphorylation. FGF21 administration also markedly decreased urinary albumin excretion and mesangial expansion and suppressed profibrotic molecule synthesis. Furthermore, FGF21 improved renal lipid metabolism and oxidative stress injury. In cultured renal cells, FGF21 was mainly expressed in mesangial cells, and knockdown of FGF21 expression by stealth small interfering RNA further aggravated high-glucose-induced profibrotic cytokine synthesis in mesangial cells. Our results suggest that FGF21 improves insulin resistance and protects against renal injury through both improvement of systemic metabolic alterations and antifibrotic effects in type 2 diabetic nephropathy. Targeting FGF21 could therefore provide a potential candidate approach for a therapeutic strategy in type 2 diabetic nephropathy.
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MESH Headings
- Adiponectin/blood
- Adiponectin/metabolism
- Adipose Tissue, White/drug effects
- Adipose Tissue, White/metabolism
- Animals
- Crosses, Genetic
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetic Retinopathy/prevention & control
- Fibroblast Growth Factors/genetics
- Fibroblast Growth Factors/metabolism
- Fibroblast Growth Factors/pharmacology
- Fibroblast Growth Factors/therapeutic use
- Gene Expression Regulation/drug effects
- Hyperlipidemias/complications
- Hyperlipidemias/prevention & control
- Hypoglycemic Agents/administration & dosage
- Hypoglycemic Agents/metabolism
- Hypoglycemic Agents/pharmacology
- Hypoglycemic Agents/therapeutic use
- Insulin Resistance
- Kidney/cytology
- Kidney/drug effects
- Kidney/metabolism
- Kidney/pathology
- Lipid Peroxidation/drug effects
- MAP Kinase Signaling System/drug effects
- Male
- Mesangial Cells/cytology
- Mesangial Cells/drug effects
- Mesangial Cells/metabolism
- Mesangial Cells/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Mutant Strains
- Oxidative Stress/drug effects
- Receptors, Fibroblast Growth Factor/biosynthesis
- Receptors, Fibroblast Growth Factor/metabolism
- Recombinant Proteins/metabolism
- Recombinant Proteins/pharmacology
- Recombinant Proteins/therapeutic use
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Chen WC, Weston B, Krishna SG, Gomez G, Rashid A, Katz MH, Lee JE, Raju GS. Prolonged endoscopic loop ligation for removal of gastrointestinal tumors. Endoscopy 2013; 45 Suppl 2 UCTN:E69-70. [PMID: 23526523 DOI: 10.1055/s-0032-1326075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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Cha JJ, Hyun YY, Lee MH, Kim JE, Nam DH, Song HK, Kang YS, Lee JE, Kim HW, Han JY, Cha DR. Renal protective effects of toll-like receptor 4 signaling blockade in type 2 diabetic mice. Endocrinology 2013; 154:2144-55. [PMID: 23568555 DOI: 10.1210/en.2012-2080] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Chronic inflammation caused by high glucose and high free fatty acid (FFA) concentrations is a major contributor to the pathogenesis of type 2 diabetes. Recent evidence suggests that activation of Toll-like receptor (TLR) signaling induces peripheral insulin resistance and mediates central insulin and leptin resistance. In this study, we investigated the renal effects of TLR4 signaling blockade in type 2 diabetic mice. Eight-week-old db/db mice were treated for 12 weeks with (S,R)-3-phenyl-4,5-dihydro-5-isoxasole acetic acid (GIT27), which targets macrophages through the inhibition of TLR4- and TLR2/6-mediated signaling pathways. Although GIT27 treatment improved glycemic control and insulin tolerance, which is associated with a lower lipid profile, it did not impact body weight or food consumption. GIT27 treatment also markedly decreased urinary albumin excretion, decreased proinflammatory cytokine synthesis, improved tissue lipid metabolism, induced oxidative stress, and improved glomerulosclerosis compared with the control db/db group. In cultured podocytes and adipocytes, high glucose levels with FFA stimulation increased TLR4 expression and proinflammatory cytokine synthesis, but the effects were abolished by GIT27 treatment. In addition, knockdown of TLR4 expression by stealth small interfering RNA abolished FFA-induced proinflammatory cytokine synthesis in cultured podocytes. In conclusion, our results suggest that GIT27 treatment improves insulin resistance and protects against the renal injury that occurs in type 2 diabetic nephropathy through both metabolic and antiglomerulosclerotic mechanisms. These results suggest that TLR pathway inhibition might play a direct protective role in diabetic kidney disease.
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Jiang ZQ, Varadhachary G, Wang X, Kopetz S, Lee JE, Wang H, Shroff R, Katz M, Wolff RA, Fleming J, Overman MJ. A retrospective study of ampullary adenocarcinomas: overall survival and responsiveness to fluoropyrimidine-based chemotherapy. Ann Oncol 2013; 24:2349-53. [PMID: 23704197 DOI: 10.1093/annonc/mdt191] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Whether carcinomas of the ampulla of Vater should be classified with biliary tract tumors and treated in a similar manner remains unknown. We sought to compare the outcomes of similarly staged periampullary adenocarcinomas (AAs) and analyze the chemotherapy responsiveness of AAs. PATIENTS AND METHODS A total of 905 patients with resected periampullary adenocarcinomas were identified from a prospective surgical registry from 1988 to 2010. A second cohort of 64 metastatic AA patients from 1992 to 2009 who received either front-line fluoropyrimidine-based or gemcitabine-based chemotherapy was also identified. RESULTS Overall survival (OS) for AAs was similar to survival with duodenal adenocarcinomas, but was significantly different from both extrahepatic biliary and pancreatic adenocarcinomas (P < 0.001 for each comparison). In multivariate analysis, AAs had a significantly improved OS in comparison with extrahepatic biliary adenocarcinomas (HR = 1.97, P = 0.006). Fluoropyrimidine-based as opposed to gemcitabine-based chemotherapy for metastatic AAs resulted in a significant improvement in time to progression (P = 0.001) but only a trend toward benefit for OS (P = 0.07) in multivariate analysis. CONCLUSIONS Differences in the natural history of ampullary and extrahepatic biliary adenocarcinomas exist. Analyses of metastatic ampullary adenocarcinomas suggest that fluoropyrimidine-based chemotherapy may represent a more appropriate front-line chemotherapy approach.
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Chung SJ, Hong JY, Lee JE, Lee PH, Sohn YH. Dental implants-induced task-specific oromandibular dystonia. Eur J Neurol 2013; 20:e80. [PMID: 23663539 DOI: 10.1111/ene.12124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 01/30/2013] [Indexed: 11/29/2022]
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Liebano RE, Vance CG, Rakel BA, Lee JE, Cooper NA, Marchand S, Walsh DM, Sluka KA. Transcutaneous electrical nerve stimulation and conditioned pain modulation influence the perception of pain in humans. Eur J Pain 2013; 17:1539-46. [PMID: 23650092 DOI: 10.1002/j.1532-2149.2013.00328.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2013] [Indexed: 01/27/2023]
Abstract
BACKGROUND Research in animal models suggests that transcutaneous electrical nerve stimulation (TENS) and conditioned pain modulation (CPM) produce analgesia via two different supraspinal pathways. No known studies have examined whether TENS and CPM applied simultaneously in human subjects will enhance the analgesic effect of either treatment alone. The purpose of the current study was to investigate whether the simultaneous application of TENS and CPM will enhance the analgesic effect of that produced by either treatment alone. METHODS Sixty healthy adults were randomly allocated into two groups: (1) CPM plus active TENS; (2) CPM plus placebo TENS. Pain threshold for heat (HPT) and pressure (PPT) were recorded from subject's left forearm at baseline, during CPM, during active or placebo TENS, and during CPM plus active or placebo TENS. CPM was induced by placing the subjects' contralateral arm in a hot water bath (46.5 °C) for 2 min. TENS (100 μs, 100 Hz) was applied to the forearm for 20 min at a strong but comfortable intensity. RESULTS Active TENS alone increased PPT (but not HPT) more than placebo TENS alone (p = 0.011). Combining CPM and active TENS did not significantly increase PPT (p = 0.232) or HPT (p = 0.423) beyond CPM plus placebo TENS. There was a significant positive association between PPT during CPM and during active TENS (r(2) = 0.46; p = 0.003). CONCLUSIONS TENS application increases PPT; however, combining CPM and TENS does not increase the CPM's hypoalgesic response. CPM effect on PPT is associated with the effects of TENS on PPT.
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Park SY, Lee JE, Lee SR. Unusual late sequela of excision surgery for sacrococcygeal teratoma: advanced pelvic organ prolapse in a woman in her early twenties. Eur J Obstet Gynecol Reprod Biol 2013; 168:238-9. [PMID: 23639673 DOI: 10.1016/j.ejogrb.2013.03.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 03/26/2013] [Indexed: 11/19/2022]
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Kim HR, Lee BS, Lee JE, Shin HI. Application of transanal irrigation for patients with spinal cord injury in South Korea: a 6-month follow-up study. Spinal Cord 2013; 51:389-94. [PMID: 23318554 DOI: 10.1038/sc.2012.171] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
STUDY DESIGN A 6-month follow-up study. OBJECTIVES To investigate the outcome of transanal irrigation (TAI) in patients with spinal cord injury (SCI) and to identify factors significantly related to clinical success. SETTING Survey for community-dwelling patients with SCI in South Korea. METHODS Between December 2010 and March 2012, TAI was initiated with 52 patients (41 men; age: 44.5±11.0 years) with neurogenic bowel dysfunction (NBD). At 1, 3 and 6 months after initiation, a telephone interview was conducted. Data were collected on patient-specific bowel management and TAI performance as a new procedure. RESULTS Only 18 patients (34%) used TAI for at least 6 months, which was a lower compliance rate than similar studies in some European countries. Relative to the compliant group, the noncompliant group contained a higher proportion of tetraplegia than paraplegia (P=0.031), and a higher proportion dependent on physical help (P=0.034). In all, 33 of the 52 patients (63.5%) complained of practical problems with the TAI procedure such as expulsion of the rectal catheter. Fifteen patients (28.8%) presented with adverse effects. The incidence of practical problems or adverse effects did not alter the frequency of patient-reported successful outcome. CONCLUSION Korean participants showed a relatively lower compliance rate with TAI. We conclude that TAI, combined with adequate patient instruction and physical assistance, has potential as a management tool for NBD in Korea.
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Choi Y, Park B, Kim K, Jeong BC, Seo SI, Jeon SS, Choi HY, Lee JE, Lee HM. Erythrocyte sedimentation rate and anaemia are independent predictors of survival in patients with clear cell renal cell carcinoma. Br J Cancer 2013; 108:387-94. [PMID: 23299540 PMCID: PMC3566817 DOI: 10.1038/bjc.2012.565] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background: The 1997 international consensus conference on renal cell cancer (RCC) prognosis suggested erythrocyte sedimentation rate (ESR), alkaline phosphatase (ALP), and anaemia as prognostic biomarkers, but most studies reviewed were limited by small sample sizes. Methods: The Cox proportional hazards model was used to evaluate whether ESR, ALP, haemoglobin (Hb), and haematocrit (Hct) could predict survival outcomes in 1307 patients with clear cell RCC (ccRCC) who underwent nephrectomy during 1994–2008. Results: During a median follow-up of 43 months, we found that the patients with preoperative high levels of ESR, had a 2.10-fold (95% confidence interval (CI): 1.21–3.67) greater risk of dying from RCC compared with patients with low levels (normal range). Patients with preoperative anaemia, assessed by Hb and Hct, had a 3.11-fold (95% CI: 1.17–8.25) and 6.20-fold (95% CI: 2.30–16.72) greater risk of dying from other illnesses, respectively, compared with patients without anaemia. ALP levels were not associated with ccRCC patients' survival. These associations for ESR and anaemia were more pronounced in patients with body mass index (BMI) <25 compared with patients with BMI ⩾25 kg m−2. Conclusion: Preoperative high ESR, but not ALP, was a significant predictor for cancer-specific survival among ccRCC patients. Anaemia increases the risk of death from other illness.
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Kim M, Lee SK, Choi MY, Kim S, Kim J, Jung SP, Bae SY, Kil WH, Lee JE, Nam SJ. Abstract P3-11-01: Matched-pair analysis of patients with male and female breast cancer. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p3-11-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: Male breast cancer (MBC) is extremely rare, accounting for less than 1% of all malignancies in men and only 1% of all breast carcinomas. The treatment and surveillance guidelines on male breast cancers are less recognized. The aim of this study is to evaluate our single institution's experience with MBC over the past 15 years and to contrast differences between female and MBC.
Methods: MBC diagnosed from 1994 to 2010 at the Department of Surgery, Samsung Medical Center (Seoul, Korea) was retrospectively analyzed. Clinical data and tumor characteristics were examined. Each MBC was matched with female counterparts by 1:N varied matching ratio that showed accordance in seven variables (year of diagnosis, age, tumor stage, nodal stage, tumor grade, estrogen receptor(ER), progesterone receptor(PR)).
Results: 39 male/184 female matched-pairs were available for analysis. The median duration of follow-up was 3.8 years. The median age of MBC patients was 50 years and the median size of tumor was 2.0cm. The proportion of positivity of ER and PR status was 97.4% and 84.6%, respectively. Despite of higher positive rate of hormone receptor, the rate of hormone therapy in MBC patients was significant lower than female conterpart (p = 0.002). Men and women with breast cancer had similar disease-free survival (DFS) and disease-specific overall survival (DSS). Five MBC patients had a recurrence during follow up period and 4 of them were expired. The 10-years DFS was 73.1% in men and 80.5% in women (p = 0.348). The 10-years DSS was 74.1% in men and 87.1% in women, respectively (p = 0.207).
Conclusion: This study showed no disease free and overall survival differences between male and female breast cancer patients and revealed that gender is no predictor for survival in breast cancer. Male patients receive obviously less adjuvant treatment compared their female matched patients. It would be better to do more aggressive treatment in MBC to improve the survival outcome.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P3-11-01.
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Lee SK, Kim M, Nam SJ, Lee JE, Yang JH. Abstract P2-10-41: The prediction of invasion in ductal carcinoma in situ: developing prediction model and validation. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p2-10-41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The aim of the study was to determine factors and develop the model that predict the risk of invasion in patients with ductal carcinoma in situ (DCIS) diagnosed by preoperative biopsy.
Methods: We selected 497 patients underwent surgical treatment for preoperatively diagnosed DCIS of the breast between 1997 and 2009. Multivariate analysis was used to identify relevant clinical, radiological and pathological factors that may predict upstaging. A prediction model was developed based on significant factors and measured using the area under the receiver operating characteristics (ROC) curve. This prediction model was subsequently validated using the dataset of 149 cases who were diagnosed with DCIS preoperatively between 2010 and 2012.
Results: Of 24.75%, there was an upstaging to the invasive cancer. We found that larger size (≥1.5cm) of DCIS was most significant factor, followed by palpable lesion on physical examination, no expression of estrogen receptor (ER)/progesterone receptor (PR), high nuclear grade, non-cribriform subtype and absence of necrosis significantly associated with presence of invasion.
The prediction model with these factors showed that excellent predictive accuracy (the area under the ROC curve= 0.851, 95% CI: 0.817–0.881) and showed similar findings in the validation data set (AUC = 0.868, 95% CI: 0.800–0.916). After ranking the significant factors, we selected 4 factors to simplify the model. This simple model also showed good prediction power (AUC = 0.821, 98% CI: 0.784–0.854).
Conclusion: We developed the prediction model to predict upstaging in patients diagnose with DCIS preoperatively based on 4 most significant factors. By this prediction model, we suggest the axilla exploration with SLNB in case of DCIS with more than 1.5 cm size, palpable lesion, no expression of HR and high NG to avoid 2nd operation.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P2-10-41.
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Park YH, Im SA, Cho EY, Ahn JH, Woo SY, Kim S, Keam B, Lee JE, Han W, Nam SJ, Park IA, Noh DY, Yang JH, Ahn JS, Im YH. Abstract P2-05-20: Validation and comparison of CS-IHC4 score with a nomogram based on Ki67 index, Adjuvant! Online, and St. Gallen risk stratification to predict recurrence in early Hormone Receptor (HR)-positive breast cancers. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p2-05-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Recently, the information in the IHC score was reported to be similar to that in the 21-gene Genomic Health recurrence score (GHI-RS). The aim of this study is to develop a nomogram based on Ki67 index to predict recurrence and to validate the nomogram by comparison with CS-IHC4 as well as Adjuvant! Online and St. Galen risk stratification. In addition, we validated our nomogram with external cohort.
Methods: We retrospectively analyzed the clinicopathologic characteristics and outcomes of 1,070 postoperative HR-positive breast cancer patients between 2004 and 2007 at the Samsung Medical Center to determine recurrence-free survival (RFS). We constructed nomogram using Cox proportional hazard model and validated externally in a cohort of 1,028 at Seoul National University Hospital. A prognostic model that used classical variables, Adjuvant! Online, St. Gallen risk stratification, and the four IHC markers (IHC4 score) were created and assessed in our cohort by LR-χ2 test using the bootstrapping method.
Results: Nomogram showed an area under the receiver operating characteristic curve (AUC) of 0.70 (95% CI, 0.62–0.75) in the training set. The validation set showed a good discrimination with an AUC of 0.65 (95% CI, 0.58–0.72). In LR-χ2 test, the nomogram score was found to be more informative than the IHC4 with CS (LR-χ2 4.0539 [df1], 95% CI; 0.1038–8.004 for CS-IHC4 + nomogram score vs. CS-IHC4).
Prognostic significance was more prominent in N1 diseases than in the others (LR-χ2 4.199, 95% CI; 1.496–6.902 for CS-IHC4 + nomogram score vs. CS-IHC4).
However, Adjuvant! Online and St. Galen risk stratification did not show any definitive additional prognostic value.
Conclusions: We developed and validated a nomogram based on Ki67 index in external patients' cohort. It was compared with CS-IHC4 in our patients' cohort in early HR-positive breast cancers. This study implicates the amount of prognostic information contained in the nomogram is superior to that in the CS-IHC4 score.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P2-05-20.
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Lee JE, Watson D, Frey-Law LA. Psychological factors predict local and referred experimental muscle pain: a cluster analysis in healthy adults. Eur J Pain 2012; 17:903-15. [PMID: 23165778 DOI: 10.1002/j.1532-2149.2012.00249.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2012] [Indexed: 11/06/2022]
Abstract
BACKGROUND Recent studies suggest an underlying three- or four-factor structure explains the conceptual overlap and distinctiveness of several negative emotionality and pain-related constructs. However, the validity of these latent factors for predicting pain has not been examined. METHODS A cohort of 189 (99 female, 90 male) healthy volunteers completed eight self-report negative emotionality and pain-related measures (Eysenck Personality Questionnaire - Revised, Positive and Negative Affect Schedule, State-Trait Anxiety Inventory, Pain Catastrophizing Scale, Fear of Pain Questionnaire; Somatosensory Amplification Scale, Anxiety Sensitivity Index and Whiteley Index). Using principal axis factoring, three primary latent factors were extracted: general distress, catastrophic thinking and pain-related fear. Using these factors, individuals clustered into three subgroups of high, moderate and low negative emotionality responses. Experimental pain was induced via intramuscular acidic infusion into the anterior tibialis muscle, producing local (infusion site) and/or referred (anterior ankle) pain and hyperalgesia. RESULTS Pain outcomes differed between clusters (multivariate analysis of variance and multinomial regression), with individuals in the highest negative emotionality cluster reporting the greatest local pain (p = 0.05), mechanical hyperalgesia (pressure pain thresholds; p = 0.009) and greater odds (2.21 odds ratio) of experiencing referred pain when compared to the lowest negative emotionality cluster. CONCLUSION Our results provide support for three latent psychological factors explaining the majority of the variance between several pain-related psychological measures, and that individuals in the high negative emotionality subgroup are at increased risk for (1) acute local muscle pain; (2) local hyperalgesia; and (3) referred pain using a standardized nociceptive input.
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Chown SL, Lee JE, Hughes KA, Barnes J, Barrett PJ, Bergstrom DM, Convey P, Cowan DA, Crosbie K, Dyer G, Frenot Y, Grant SM, Herr D, Kennicutt MC, Lamers M, Murray A, Possingham HP, Reid K, Riddle MJ, Ryan PG, Sanson L, Shaw JD, Sparrow MD, Summerhayes C, Terauds A, Wall DH. Conservation. Challenges to the future conservation of the Antarctic. Science 2012; 337:158-9. [PMID: 22798586 DOI: 10.1126/science.1222821] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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