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Ahn YJ, Hong KE, Yum HR, Lee JH, Kim KS, Youn YA, Park SH. Characteristic clinical features associated with aggressive posterior retinopathy of prematurity. Eye (Lond) 2017; 31:924-930. [PMID: 28234354 DOI: 10.1038/eye.2017.18] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 12/22/2016] [Indexed: 12/13/2022] Open
Abstract
PurposeTo identify the risk factors for, and clinical features and treatment outcomes of aggressive posterior retinopathy of prematurity (APROP) in Korean infants.MethodsAmong 770 premature infants who underwent screening, 105 infants (198 eyes, 13.63%) received treatment for ROP. A total of 24 infants (48 eyes, 3.12%) developed APROP while 81 infants (150 eyes, 10.52%) developed non-APROP treatment-requiring type. The medical records of ROP-treated infants were reviewed retrospectively. The associated systemic and maternal risk factors were analyzed and anatomical outcomes were compared according to the severity of ROP and treatment modalities.ResultsThe mean gestational age and birth weight at birth in the APROP group were significantly lower than those in the non-APROP group (P=0.019, P<0.001, respectively). Infants who were born small for their GA developed APROP more frequently than non-APROP patients (P<0.001). Chorioamnionitis-positive infants also showed higher incidence rate of APROP (APROP vs non-APROP; P<0.001 and zone I APROP vs posterior zone II APROP; P=0.036, respectively). Infants with APROP required heavier laser treatment with a higher retreatment rate compared to infants with non-APROP. Favorable anatomical outcomes were achieved in 95.3% from treatment-requiring non-APROP group, 85.7% from zone I APROP and 84.6% from posterior zone II APROP group.ConclusionIntrauterine growth restriction and chorioamnionitis were associated with development of APROP. These findings suggest that perinatal maternal environment inhibiting normal retinal vascular growth in utero may contribute to increasing the risk of APROP in premature infants.
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Affiliation(s)
- Y J Ahn
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K E Hong
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H R Yum
- Department of Ophthalmology, Konyang University Hospital, Daejeon, South Korea
| | - J H Lee
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K S Kim
- Apgujeong St Mary's Eye Center, Seoul, South Korea
| | - Y A Youn
- Department of Pediatrics, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S H Park
- Department of Ophthalmology and Visual Science, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Kim JH, Lim SM, Kim SI, Park SH, Park HS, Kim JY. Abstract OT2-04-01: Study on the usefulness of the skin wound therapeutic agent 'Neo dermal activator' in breast cancer surgery. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-ot2-04-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background : Wound infection after breast cancer surgery is considered to be factors that increase the discomfort of the patient and increase of the extension and the use of antibiotics in the treatment time period, in particular breast cancer postoperative wound infection resulting slow the implementation of adjunctive therapy such as radiation therapy or chemotherapy after surgery can cause, it is important to effectively prevent, there has been a development of a variety of skin wound therapeutic agent to reduce them. The purpose of this study was to evaluate the effects of the wound dressing with existing wound dressing Neo dermal activator compared to the patients receiving preoperative chemotherapy.
Methods : A total of 54 breast cancer patients who recieved BCS & mastectomy devided two group(each 27 patients) through the random assignment between Jan, 2016 and June, 2016. Day one weeks after surgery to examine the wound infection rate (surgical site infection, SSI rate). After six months of outpatient surgery visits to check the wounds of patients, using the VAS records the scar of the wound satisfaction. For patients who underwent radiation therapy, check out the time it took to begin radiation therapy after surgery.
All tests were two-sided. All statistical analyses were performed using SPSS version 20.0 (SPSS Inc., Chicago, Illinois, USA).
Eligbility criteria is :
- one side breast cancer
- not inflammatory breast cancer
- recieved BCS and mastectomy only (without immediate reconstruction surgery)
- stage IV breast cancer.
Citation Format: Kim JH, Lim SM, Kim SI, Park SH, Park HS, Kim JY. Study on the usefulness of the skin wound therapeutic agent 'Neo dermal activator' in breast cancer surgery [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr OT2-04-01.
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Affiliation(s)
- JH Kim
- Yonsei University Health System, Seoul, Korea
| | - SM Lim
- Yonsei University Health System, Seoul, Korea
| | - SI Kim
- Yonsei University Health System, Seoul, Korea
| | - SH Park
- Yonsei University Health System, Seoul, Korea
| | - HS Park
- Yonsei University Health System, Seoul, Korea
| | - JY Kim
- Yonsei University Health System, Seoul, Korea
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Irie HY, Park SH, Katsyv I, Zhang W, Nayak A. Abstract P3-04-13: Protein tyrosine kinase 6 (PTK6) promotes survival of endocrine therapy-resistant ER+ breast cancer cells. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p3-04-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background/Rationale: The non-receptor tyrosine kinase PTK6/Brk is highly expressed in the ER+/Luminal breast cancer subtypes. PTK6 expression has prognostic significance for patients with ER+ disease; higher transcript levels are associated with poorer survival. The functions of PTK6 in the context of ER+ breast cancer and sensitivity to endocrine therapy have not been explored. We sought to determine the functional roles of PTK6 in ER+ breast cancer cells, including those that are relatively resistant to current endocrine therapies. Methods/Results. We modulated the expression of PTK6 using both gain- and loss-of-function approaches. Enhanced expression of PTK6 in Tamoxifen-sensitive ER+ breast cancer cells was sufficient to confer relative Tamoxifen resistance. Furthermore, downregulation of PTK6 in ER+ breast cancer cells, including those that have acquired resistance to Tamoxifen, induced apoptosis, as evidenced by an increase in AnnexinV+ cells and increased levels of cleaved PARP. PTK6 downregulation impaired growth of Tamoxifen-resistant variants of ER+ MCF7 and T47D cells (MCF7TamR and T47DTamR) in 3D Matrigel culture, and virtually abrogated primary tumor growth of MCF7TamR xenografts. Mechanistically, p38MAPK activation is critical for PTK6 downregulation-induced apoptosis of ER+ breast cancer cells, as p38 inhibition partially rescues cells from PTK6 shRNA-associated apoptosis. Conclusions: Our studies highlight the critical role that PTK6 plays in the survival of ER+ breast cancer cells, including those that are resistant to endocrine therapy. Enhanced PTK6 expression in ER+ breast cancer cells is sufficient to promote endocrine therapy resistance, which could contribute to the poorer prognosis associated with higher PTK6 expression in ER+ patient tumors. As small molecule PTK6 inhibitors are becoming available, our studies support further evaluation of PTK6 as a candidate therapeutic target for endocrine therapy resistant ER+ breast cancers.
Citation Format: Irie HY, Park SH, Katsyv I, Zhang W, Nayak A. Protein tyrosine kinase 6 (PTK6) promotes survival of endocrine therapy-resistant ER+ breast cancer cells [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P3-04-13.
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Affiliation(s)
- HY Irie
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - SH Park
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - I Katsyv
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - W Zhang
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - A Nayak
- Icahn School of Medicine at Mount Sinai, New York, NY
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Park SH, Jeong YJ, Bong JG, Oh HK. Abstract P6-05-05: The expression of lysyl oxidase and fibrotic focus is related to inflammation in breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-05-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Lysyl oxidase (LOX) is an extracellular matrix enzyme that catalyzes the
cross-linking of collagens or elastin. Our hypothesis is that LOX contributes to the formation
of a fibrotic focus (FF), which is related to inflammation in breast carcinogenesis.
In this study, we analyzed the association between the expression LOXs and FF, and
investigated prognostic significance in breast cancer.
Methods: Tissue microarrarys were constructed from the specimens of 444 patients
with primary invasive breast cancer. Immunohistochemical staining for LOX, LOXlike
(LOXL)-, LOXL-2 and LOXL-3 was performed. The status of FF within the tumor
was assessed. The number of CD4+ T cells, CD8+ T cells, CD68+ macrophages was
counted, and intratumoral and peritumoral lymphocyte infiltration were evaluated.
The clinicopathologic characteristics of the patients were analyzed.
Result: The percentage of positive FF was 39.2% and positive rate of LOX expression
was 50% in primary breast cancer tissues. FF was found to be significantly associated
with intratumoral and peritumoral inflammation, lymph node metastasis, high histologic
grade, larger tumor size. LOX was associated with intratumoral and peritumoral
inflammation, CD8+ T cells and menopausal status. LOXL-3 was significantly associated
with positive expression of ER and PR, and molecular subtype.
Conclusions: FF and the expression of LOX were associated with inflammation in
breast cancer in this study. Our results suggest that LOXs may contribute to the formation
of a FF indirectly in relation with inflammation in breast cancer. Further studies
are needed to clarify the role of LOXs, FF and inflammation in tumorigenesis and
prognostic value of them in breast cancer.
Citation Format: Park SH, Jeong YJ, Bong JG, Oh HK. The expression of lysyl oxidase and fibrotic focus is related to inflammation in breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P6-05-05.
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Affiliation(s)
- SH Park
- Daegu Catholic University Medical Center, Daegu, Republic of Korea
| | - YJ Jeong
- Daegu Catholic University Medical Center, Daegu, Republic of Korea
| | - JG Bong
- Daegu Catholic University Medical Center, Daegu, Republic of Korea
| | - HK Oh
- Daegu Catholic University Medical Center, Daegu, Republic of Korea
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Park S, Kim HJ, Ko BG, Chung JW, Kim SH, Park SH, Lee MH, Yeom JS. The prevalence and impact of sarcopenia on degenerative lumbar spinal stenosis. Bone Joint J 2017; 98-B:1093-8. [PMID: 27482023 DOI: 10.1302/0301-620x.98b8.37623] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 03/16/2016] [Indexed: 12/28/2022]
Abstract
AIMS The purpose of this study was to investigate the prevalence of sarcopenia and to examine its impact on patients with degenerative lumbar spinal stenosis (DLSS). PATIENTS AND METHODS This case-control study included two groups: one group consisting of patients with DLSS and a second group of control subjects without low back or neck pain and related leg pain. Five control cases were randomly selected and matched by age and gender (n = 77 cases and n = 385 controls) for each DLSS case. Appendicular muscle mass, hand-grip strength, sit-to-stand test, timed up and go (TUG) test, and clinical outcomes, including the Oswestry Disability Index (ODI) scores and the EuroQol EQ-5D were compared between the two groups. RESULTS The prevalence of sarcopenia, as defined by hand-grip strength, was significantly higher in the DLSS group (24%) when compared with the age- and gender-matched control group (12%) (p = 0.004). In the DLSS group, the sarcopenia subgroup demonstrated inferior results for the TUG test and ODI scores when compared with the non-sarcopenia subgroup (p = 0.006 and p = 0.039, respectively) after adjusting for age and gender. CONCLUSION This study demonstrated a higher prevalence of sarcopenia in patients with DLSS and highlighted its negative effect on clinical outcomes. Cite this article: Bone Joint J 2016;98-B:1093-8.
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Affiliation(s)
- S Park
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - H J Kim
- Seoul National University College of Medicine and Seoul National University Bundang Hospital, 166 Gumiro, Bundang-gu, Sungnam, 463-707, Republic of Korea
| | - B G Ko
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - J W Chung
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - S H Kim
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - S H Park
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - M H Lee
- Korea Institute of Sports Science, 727 Hwarang-lo Nowon-gu, Seoul, 01794, Republic of Korea
| | - J S Yeom
- Seoul National University College of Medicine and Seoul National University Bundang Hospital, 166 Gumiro, Bundang-gu, Sungnam, 463-707, Republic of Korea
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Rahman MA, Park SH, Yu IJ. Effect of Monosaccharides in Glycerol-free Tris Extender on Reactive Oxygen Species and Apoptosis in Dog Sperm Cryopreservation. Cryo Letters 2017; 38:51-57. [PMID: 28376140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND OBJECTIVE The present study investigated the effect of monosaccharides in a glycerol-free tris (GFT) extender on reactive oxygen species (ROS) levels and apoptosis in cryopreserved dog spermatozoa. MATERIALS AND METHODS The sperm pellets were resuspended (5 × 107 mL-1) with GFT containing 172 mM glucose (G), 86 mM glucose + 86 mM fructose (GF), 86 mM glucose + 86 mM galactose (Gg), 172 mM fructose (F), 172 mM galactose (g) or 86 mM fructose + 86 mM galactose (Fg). The sperm (500 µL) were loaded in 0.5 mL straws and cooled for 50 min at 4 degree C. The straws were then frozen 7 cm from the surface of liquid nitrogen (LN2) for 20 min and were finally plunged into LN2. After freezing-thawing, the sperm motility and viability were evaluated. The ROS level (H2O2) and apoptosis index were assessed by using flow cytometry. RESULTS GFT supplemented with GF resulted in significantly higher (P < 0.05) progressive sperm motility and viability followed by only G, which had greater ROS reducing capacity. However, sperm cell apoptosis had no significant differences among all the experimental groups. CONCLUSION Cryopreservation of dog sperm in GFT containing GF yields more motile and viable sperm followed by only G, which has greater ROS reducing efficiency.
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Affiliation(s)
- M A Rahman
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Chonbuk National University, Iksan, Republic of Korea
| | - S H Park
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Chonbuk National University, Iksan, Republic of Korea
| | - I J Yu
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Chonbuk National University, Iksan, Republic of Korea.
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Abstract
PURPOSE This study compared the internal adaptation of bulk-fill composite restorations in class II cavities and explored the relationship between internal adaptation and polymerization shrinkage or stress. METHODS AND MATERIALS Standardized mesio-occluso-distal cavities were prepared in 40 extracted human third molars and randomly divided into five groups (n=8). After having been applied by total-etch XP bond (Dentsply Caulk, Milford, DE, USA) and light curing, the teeth were restored with the following resin composites: group 1, Filtek Z350 (3M ESPE, St. Paul, MN, USA); group 2, SDR (Dentsply Caulk, Milford, DE, USA) + Z350; group 3, Venus Bulk Fill (Heraeus Kulzer, Dormagen, Germany) + Z350; group 4, Tetric N-Ceram Bulk Fill (Ivoclar Vivadent, Schaan, Liechtenstein); and group 5, SonicFill (Kerr, West Collins, Orange, CA, USA). After thermo-mechanical load cycling, cross-sectional microcomputerized tomography (micro-CT) images were taken. Internal adaptation was measured as imperfect margin percentage (IM%), which was the percentage of defective margin length relative to whole margin length. On the micro-CT images, IM% was measured at five interfaces. Linear polymerization shrinkage (LS) and polymerization shrinkage stress (PS) were measured on each composite with a custom linometer and universal testing machine. To explore the correlation of IM% and LS or PS, the Pearson correlation test was used. RESULTS The IM% of the gingival and pulpal cavity floors were inferior to those of the cavity walls. The IM% values of the groups were found to be as follows: group 5 ≤ groups 1 and 4 ≤ group 2 ≤ group 3. The correlation analysis showed that the p value was 0.006 between LS and IM% and 0.003 between PS and IM%, indicating significant correlations (p<0.05). CONCLUSION Flowable bulk-fill composites had a higher IM% and polymerization shrinkage stress than did packable bulk-fill and hybrid composites. In class II composite restoration, the gingival floor of the proximal box and pulpal floor of the cavity had higher IM% than did the buccal and lingual walls of the proximal box. LS and PS, which were measured under compliance-allowed conditions, were significantly related to internal adaptation.
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Lee JW, An JH, Park SH, Chong JH, Kim GS, Han J, Jung S, Kook MS, Oh HK, Ryu SY, Park HJ. Retrospective clinical study of an implant with a sandblasted, large-grit, acid-etched surface and internal connection: analysis of short-term success rate and marginal bone loss. Maxillofac Plast Reconstr Surg 2016; 38:42. [PMID: 27882311 PMCID: PMC5097118 DOI: 10.1186/s40902-016-0089-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 09/29/2016] [Indexed: 12/03/2022] Open
Abstract
Background The purpose of this retrospective study was to evaluate the clinical utility of an implant with a sandblasted, large-grit, acid-etched (SLA) surface and internal connection. Methods Six patients who received dental implants in the Department of Oral and Maxillofacial Surgery, Chonnam National University Dental Hospital, were analyzed by factors influencing the success rate and marginal bone loss. Factors included patient’s age, sex, implant installation site, whether bone graft was done, type of bone graft materials, approaching method if sinus lift was done, and the size of the fixture. In addition, the marginal bone loss was analyzed by using a radiograph. Results All implants were successful, and the cumulative survival rate was 100 %. Average marginal bone loss of 6 months after the installation was 0.52 mm and 20 months after the functional loading was 1.06 mm. Total marginal bone resorption was 1.58 mm on average. There was no statistically significant difference in mesial and distal marginal bone loss. Conclusions The short-term clinical success rate of the implant with an SLA surface and internal connection was satisfactory. Moreover, the marginal bone loss was also consistent with the implant success criteria.
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Affiliation(s)
- Jae-Wang Lee
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Jun Hyeong An
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Sang-Hoon Park
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Jong-Hyon Chong
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Gwang-Seok Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - JeongJoon Han
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Seunggon Jung
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Min-Suk Kook
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Hee-Kyun Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Sun-Youl Ryu
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
| | - Hong-Ju Park
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Republic of Korea
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Park KA, Oh YJ, Kim KM, Eum SY, Cho MH, Son YH, Park SH, Woo KM, Lee YS, Kim S, Chang HS, Park CS. Navigation programs, are they helpful for perioperative care with thyroid cancer patients? Eur J Cancer Care (Engl) 2016; 26. [PMID: 27726224 DOI: 10.1111/ecc.12592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2016] [Indexed: 12/23/2022]
Abstract
The purpose of this study was to develop and evaluate a navigation program for patients with thyroid cancer. The navigation program was developed following an analysis of the unmet needs of patients who underwent surgery for thyroid cancer. Ninety-nine patients in the control group received usual care, and 95 in the navigation group were managed with a navigation program during the perioperative period. The effectiveness of the navigation program was assessed by administering a questionnaire to both groups. Overall satisfaction scores were significantly higher in the navigation than in the control group (p = .025), as were satisfaction scores on the continuity of information (p < .001), the continuity of management (p = .002), the continuity of relationships with healthcare providers (p<.001), and patient empowerment (p < .001). The newly developed navigation program for patients with thyroid cancer was effective in raising satisfaction levels and in actively managing the disease during the perioperative period.
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Affiliation(s)
- K A Park
- Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea.,Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - Y J Oh
- Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea.,Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - K M Kim
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - S Y Eum
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - M H Cho
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - Y H Son
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - S H Park
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - K M Woo
- Division of Nursing, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - Y S Lee
- Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - S Kim
- Department of Clinical Nursing Science & Mo Im Kim Nursing Research Institute, Yonsei University College of Nursing, Seoul, Korea
| | - H-S Chang
- Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
| | - C S Park
- Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University Health System, Seoul, Korea
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110
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Lee JS, Kim MJ, Park SH, Lee SB, Wang T, Jung US, Im J, Kim EJ, Lee KW, Lee HG. Effects of dietary mixture of garlic (Allium sativum), coriander (Coriandrum sativum) and probiotics on immune responses and caecal counts in young laying hens. J Anim Physiol Anim Nutr (Berl) 2016; 101:e122-e132. [PMID: 27678135 DOI: 10.1111/jpn.12573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 06/16/2016] [Indexed: 11/27/2022]
Abstract
This study was conducted to evaluate the effects of a combined mixture of phytogenic extracts (garlic and coriander) and probiotics on growth performance and immune responses in laying hens based on the results of in vitro studies to screen for immunomodulatory potency of each ingredient. Several parameters of immunomodulatory potency were estimated using lamina propria leucocytes (LPLs) isolated from rat intestinal mucosa tissue. Results show that the combined mixture enhanced LPLs proliferation, increased LPL-mediated cytotoxicity against YAC-1 tumour cells, and decreased lipopolysaccharide (LPS)-induced cytokine production including tumour necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in LPLs. For in vivo study, laying hens (n = 50/each diet group) were fed with control diet, a diet containing antibiotics (0.01% per kg feed) or the combined mixture (0.02% per kg feed) for 21 days. The dietary combined mixture improved egg production (p < 0.05) but not growth performance and carcass traits. Interestingly, the patterns of suppressing plasma IFN-γ productions during inflammation by LPS injection and decreasing caecal E. coli counts in the combined mixture group were comparable to those in the antibiotics group. Taken together, our results suggested that the 0.02% of combined mixture of phytogenic extracts and probiotics as ingredients has potential immunomodulatory effects in laying hens.
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Affiliation(s)
- J S Lee
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea.,Team of An Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk University, Gwangjin-gu, Seoul, Korea
| | - M J Kim
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea
| | - S H Park
- Department of Animal Science, College of Natural Resources and Life Science, Pusan National University, Gyeongnam, Korea
| | - S B Lee
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea
| | - T Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - U S Jung
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea
| | - J Im
- Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - E J Kim
- Division of Animal Husbandry, College of Chonan Yonam, Cheonan-si, Chungnam, Korea
| | - K W Lee
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea.,Team of An Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk University, Gwangjin-gu, Seoul, Korea
| | - H G Lee
- Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, Gwangjin-gu, Seoul, Korea.,Team of An Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk University, Gwangjin-gu, Seoul, Korea
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Jo SY, Park SH, Kim IS, Yi J, Kim HH, Chang CL. Performance evaluation of recently launched Sysmex XN-550 Automatic Hematology Analyzer. Int J Lab Hematol 2016; 39:e4-e9. [PMID: 27566446 DOI: 10.1111/ijlh.12571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S Y Jo
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - S H Park
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Hospital, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - I-S Kim
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - J Yi
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Hospital, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - H-H Kim
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Hospital, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - C L Chang
- Department of Laboratory Medicine, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
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112
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Kim CJ, Choi WS, Jung Y, Kiem S, Seol HY, Woo HJ, Choi YH, Son JS, Kim KH, Kim YS, Kim ES, Park SH, Yoon JH, Choi SM, Lee H, Oh WS, Choi SY, Kim NJ, Choi JP, Park SY, Kim J, Jeong SJ, Lee KS, Jang HC, Rhee JY, Kim BN, Bang JH, Lee JH, Park S, Kim HY, Choi JK, Wi YM, Choi HJ. Surveillance of the Middle East respiratory syndrome (MERS) coronavirus (CoV) infection in healthcare workers after contact with confirmed MERS patients: incidence and risk factors of MERS-CoV seropositivity. Clin Microbiol Infect 2016; 22:880-886. [PMID: 27475739 PMCID: PMC7128923 DOI: 10.1016/j.cmi.2016.07.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/11/2016] [Accepted: 07/16/2016] [Indexed: 01/16/2023]
Abstract
Given the mode of transmission of Middle East respiratory syndrome (MERS), healthcare workers (HCWs) in contact with MERS patients are expected to be at risk of MERS infections. We evaluated the prevalence of MERS coronavirus (CoV) immunoglobulin (Ig) G in HCWs exposed to MERS patients and calculated the incidence of MERS-affected cases in HCWs. We enrolled HCWs from hospitals where confirmed MERS patients had visited. Serum was collected 4 to 6 weeks after the last contact with a confirmed MERS patient. We performed an enzyme-linked immunosorbent assay (ELISA) to screen for the presence of MERS-CoV IgG and an indirect immunofluorescence test (IIFT) to confirm MERS-CoV IgG. We used a questionnaire to collect information regarding the exposure. We calculated the incidence of MERS-affected cases by dividing the sum of PCR-confirmed and serology-confirmed cases by the number of exposed HCWs in participating hospitals. In total, 1169 HCWs in 31 hospitals had contact with 114 MERS patients, and among the HCWs, 15 were PCR-confirmed MERS cases in study hospitals. Serologic analysis was performed for 737 participants. ELISA was positive in five participants and borderline for seven. IIFT was positive for two (0.3%) of these 12 participants. Among the participants who did not use appropriate personal protective equipment (PPE), seropositivity was 0.7% (2/294) compared to 0% (0/443) in cases with appropriate PPE use. The incidence of MERS infection in HCWs was 1.5% (17/1169). The seroprevalence of MERS-CoV IgG among HCWs was higher among participants who did not use appropriate PPE.
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Affiliation(s)
- C-J Kim
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea
| | - W S Choi
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, South Korea
| | - Y Jung
- Department of Internal Medicine, Konyang University Hospital, South Korea
| | - S Kiem
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, South Korea
| | - H Y Seol
- Department of Internal Medicine, Good GangAn Hospital, South Korea
| | - H J Woo
- Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, South Korea
| | - Y H Choi
- Department of Internal Medicine, Ajou University Hospital, South Korea
| | - J S Son
- Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, South Korea
| | - K-H Kim
- Department of Internal Medicine, Pusan National University Hospital, South Korea
| | - Y-S Kim
- Division of Infectious Diseases, Department of Internal Medicine, Chungnam National University School of Medicine, South Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, South Korea
| | - S H Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Daejeon St. Mary's Hospital, South Korea
| | - J H Yoon
- Department of Internal Medicine, Eulji University Hospital, South Korea
| | - S-M Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, South Korea
| | - H Lee
- Division of Infectious Diseases, Dong-A University Hospital, South Korea
| | - W S Oh
- Department of Internal Medicine, Kangwon National University Hospital, South Korea
| | - S-Y Choi
- Department of Neurology, Dae Cheong Hospital, South Korea
| | - N-J Kim
- Department of Internal Medicine, Seoul National University Hospital, South Korea
| | - J-P Choi
- Department of Internal Medicine, Seoul Medical Center, South Korea
| | - S Y Park
- Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, South Korea
| | - J Kim
- Department of Internal Medicine, Hanyang University Guri Hospital, South Korea
| | - S J Jeong
- Department of Internal Medicine, Gangnam Severance Hospital, South Korea
| | - K S Lee
- Department of Internal Medicine, Myongji Hospital, South Korea
| | - H C Jang
- Department of Internal Medicine, Chonnam National University Hospital, South Korea
| | - J Y Rhee
- Department of Internal Medicine, Dankook University Hospital, South Korea
| | - B-N Kim
- Department of Internal Medicine, Inje University Sanggye Paik Hospital, South Korea
| | - J H Bang
- Department of Internal Medicine, Borame Medical Center, South Korea
| | - J H Lee
- Department of Internal Medicine, Wonkwang University Hospital, South Korea
| | - S Park
- Department of Family Medicine, Seobuk Hospital Seoul Metropolitan Government, South Korea
| | - H Y Kim
- Department of Internal Medicine, Wonju Severance Christian Hospital, South Korea
| | - J K Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Bucheon St. Mary's Hospital, South Korea
| | - Y-M Wi
- Department of Internal Medicine, Samsung Changwon Hospital, South Korea
| | - H J Choi
- Department of Internal Medicine, Division of Infectious Diseases, Ewha Womans University School of Medicine, South Korea.
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113
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Park JH, Kim JE, Gu JY, Yoo HJ, Park SH, Kim YI, Nam-Goong IS, Kim ES, Kim HK. Evaluation of Circulating Markers of Neutrophil Extracellular Trap (NET) Formation as Risk Factors for Diabetic Retinopathy in a Case-Control Association Study. Exp Clin Endocrinol Diabetes 2016; 124:557-561. [PMID: 27420129 DOI: 10.1055/s-0042-101792] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Background: Inflammatory stimuli can induce neutrophils to release nuclear DNA combined with histones into the extracellular space, forming neutrophil extracellular traps. Because inflammation contributes to diabetic retinopathy, it is plausible that neutrophil extracellular trap formation actively occurs in diabetic retinopathy. This case-control study investigated the clinical relevance of circulating levels of neutrophil extracellular trap components as risk factors of diabetic retinopathy, and further evaluated whether glucose induced neutrophil extracellular trap formation in vitro using whole blood from healthy volunteers. Methods: Circulating levels of DNA-histone complexes, cell free double-stranded DNA, and polymorphonuclear neutrophil elastase, considered to be markers of neutrophil extracellular trap formation, were measured in patients with diabetic retinopathy (n=28) and without (n=62) and in 28 healthy controls. Results: Circulating DNA-histone complex and polymorphonuclear neutrophil elastase levels were significantly increased in patients with diabetic retinopathy compared with those without retinopathy. Multivariable logistic regression analysis, adjusted for glycated hemoglobin levels and fasting blood glucose, revealed that DNA-histone complex and polymorphonuclear neutrophil elastase levels were significant independent risk factors of retinopathy. In vitro experiments also showed that glucose significantly increased markers of neutrophil extracellular trap formation in a dose-dependent manner. Conclusions: Markers of neutrophil extracellular trap formation were independent risk factors of diabetic retinopathy. This finding provides a new insight into the potential therapeutic and preventive approaches to dampen neutrophil extracellular trap formation.
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Affiliation(s)
- J-H Park
- Department of Laboratory Medicine and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-E Kim
- Department of Laboratory Medicine and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J-Y Gu
- Department of Laboratory Medicine and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - H J Yoo
- Department of Laboratory Medicine and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S H Park
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Y I Kim
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - I S Nam-Goong
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - E S Kim
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - H K Kim
- Department of Laboratory Medicine and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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114
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Lee PB, Kim YC, Lim YJ, Lee CJ, Choi SS, Park SH, Lee JG, Lee SC. Efficacy of Pulsed Electromagnetic Therapy for Chronic Lower Back Pain: A Randomized, Double-blind, Placebo-controlled Study. J Int Med Res 2016; 34:160-7. [PMID: 16749411 DOI: 10.1177/147323000603400205] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 11/15/2022] Open
Abstract
This randomized, double-blind, placebo-controlled clinical trial studied the effectiveness of pulsed electromagnetic therapy (PEMT) in patients with chronic lower back pain. Active PEMT ( n = 17) or placebo treatment ( n = 19) was performed three times a week for 3 weeks. Patients were assessed using a numerical rating scale (NRS) and revised Oswestry disability scores for 4 weeks after therapy. PEMT produced significant pain reduction throughout the observation period compared with baseline values. The percentage change in the NRS score from baseline was significantly greater in the PEMT group than the placebo group at all three time-points measured. The mean revised Oswestry disability percentage after 4 weeks was significantly improved from the baseline value in the PEMT group, whereas there were no significant differences in the placebo group. In conclusion, PEMT reduced pain and disability and appears to be a potentially useful therapeutic tool for the conservative management of chronic lower back pain.
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Affiliation(s)
- P B Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea
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115
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Chae H, Kim M, Kim Y, Kim J, Kwon A, Choi H, Park J, Jang W, Lee YS, Park SH, Kim MS. Mutational spectrum of Korean patients with corneal dystrophy. Clin Genet 2016; 89:678-89. [PMID: 26748743 DOI: 10.1111/cge.12726] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 12/29/2015] [Accepted: 01/04/2016] [Indexed: 11/29/2022]
Abstract
Corneal dystrophy typically refers to a group of rare hereditary disorders with a heterogeneous genetic background. A comprehensive molecular genetic analysis was performed to characterize the genetic spectrum of corneal dystrophies in Korean patients. Patients with various corneal dystrophies underwent thorough ophthalmic examination, histopathologic examination, and Sanger sequencing. A total of 120 probands were included, with a mean age of 50 years (SD = 18 years) and 70% were female. A total of 26 mutations in five genes (14 clearly pathogenic and 12 likely pathogenic) were identified in 49 probands (41%). Epithelial-stromal TGFBI dystrophies, macular corneal dystrophy and Schnyder corneal dystrophy (SCD) showed 100% mutation detection rates, while endothelial corneal dystrophies showed lower detection rates of 3%. Twenty six non-duplicate mutations including eight novel mutations were identified and mutations associated with SCD were identified genetically for the first time in this population. This study provides a comprehensive characterization of the genetic aberrations in Korean patients and also highlights the diagnostic value of molecular genetic analysis in corneal dystrophies.
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Affiliation(s)
- H Chae
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Kim
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - A Kwon
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H Choi
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Park
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - W Jang
- Catholic Genetic Laboratory Center, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y S Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S H Park
- Department of Ophthalmology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - M S Kim
- Department of Ophthalmology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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116
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Koh JH, Kwok SK, Lee J, Son CN, Kim JM, Kim HO, Park SH, Sung YK, Choe JY, Lee SS, Park SH. Pain, xerostomia, and younger age are major determinants of fatigue in Korean patients with primary Sjögren’s syndrome: a cohort study. Scand J Rheumatol 2016; 46:49-55. [DOI: 10.3109/03009742.2016.1153142] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- JH Koh
- Division of Rheumatology, Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - SK Kwok
- Division of Rheumatology, Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - J Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - CN Son
- Division of Rheumatology, Department of Internal Medicine, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - J-M Kim
- Division of Rheumatology, Department of Internal Medicine, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - HO Kim
- Division of Rheumatology, Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, South Korea
| | - SH Park
- Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
| | - YK Sung
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - JY Choe
- Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
| | - SS Lee
- Division of Rheumatology, Department of Internal Medicine, Chonnam National University School of Medicine, Gwangju, South Korea
| | - SH Park
- Division of Rheumatology, Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
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117
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Higgins TM, Park SH, King PJ, Zhang CJ, McEvoy N, Berner NC, Daly D, Shmeliov A, Khan U, Duesberg G, Nicolosi V, Coleman JN. A Commercial Conducting Polymer as Both Binder and Conductive Additive for Silicon Nanoparticle-Based Lithium-Ion Battery Negative Electrodes. ACS Nano 2016; 10:3702-13. [PMID: 26937766 DOI: 10.1021/acsnano.6b00218] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
UNLABELLED This work describes silicon nanoparticle-based lithium-ion battery negative electrodes where multiple nonactive electrode additives (usually carbon black and an inert polymer binder) are replaced with a single conductive binder, in this case, the conducting polymer PEDOT PSS. While enabling the production of well-mixed slurry-cast electrodes with high silicon content (up to 95 wt %), this combination eliminates the well-known occurrence of capacity losses due to physical separation of the silicon and traditional inorganic conductive additives during repeated lithiation/delithiation processes. Using an in situ secondary doping treatment of the PEDOT PSS with small quantities of formic acid, electrodes containing 80 wt % SiNPs can be prepared with electrical conductivity as high as 4.2 S/cm. Even at the relatively high areal loading of 1 mg/cm(2), this system demonstrated a first cycle lithiation capacity of 3685 mA·h/g (based on the SiNP mass) and a first cycle efficiency of ∼78%. After 100 repeated cycles at 1 A/g this electrode was still able to store an impressive 1950 mA·h/g normalized to Si mass (∼75% capacity retention), corresponding to 1542 mA·h/g when the capacity is normalized by the total electrode mass. At the maximum electrode thickness studied (∼1.5 mg/cm(2)), a high areal capacity of 3 mA·h/cm(2) was achieved. Importantly, these electrodes are based on commercially available components and are produced by the standard slurry coating methods required for large-scale electrode production. Hence, the results presented here are highly relevant for the realization of commercial LiB negative electrodes that surpass the performance of current graphite-based negative electrode systems.
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Affiliation(s)
- Thomas M Higgins
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Physics, Trinity College Dublin , Dublin 2, Ireland
| | - Sang-Hoon Park
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Paul J King
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- Efficient Energy Transfer Deptmartment, Bell Labs Research , Nokia, Blanchardstown Business & Technology Park, Snugborough Road, Dublin 15, Ireland
| | - Chuanfang John Zhang
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Niall McEvoy
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Nina C Berner
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Dermot Daly
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Physics, Trinity College Dublin , Dublin 2, Ireland
| | - Aleksey Shmeliov
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Umar Khan
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Physics, Trinity College Dublin , Dublin 2, Ireland
| | - Georg Duesberg
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Valeria Nicolosi
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Chemistry, Trinity College Dublin , Dublin 2, Ireland
| | - Jonathan N Coleman
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Trinity College Dublin , Dublin 2, Ireland
- School of Physics, Trinity College Dublin , Dublin 2, Ireland
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118
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Rahman MA, Park SH, Yu IJ. Dog sperm cryopreservation using one step dilution with glycerol-free tris extender. Cryo Letters 2016; 37:137-141. [PMID: 27224526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE The present study was to investigate a freezing method using one step-dilution with glycerol-free TRIS extender containing 172.2 mM glucose (GFTG). MATERIALS AND METHODS The sperm pellet from selected ejaculates was resuspended in GFTG at 1×10(8) cells/mL. The semen was cooled for 10, 30, 50 or 70 min in GFTG at 4 degree C and was frozen in LN(2) vapor or in deep freezer (-80 degree C, DF) for 20 min before plunge into LN(2). Post-thaw sperm characteristics were examined. The phosphatidylserine (PS) translocation (Annexin V-FITC) and DNA integrity (TUNEL assay) were assessed using flow cytometry. RESULTS Progressive motility and viability were significantly higher in 50 and 70 min groups than the other groups (P<0.05). PS translocation index was significantly lower in spermatozoa cooled for 50 or 70 min compared to 10 min (P<0.05). Freezing methods using LN2 vapor showed higher progressive motility than DF method (P<0.05), while viability and DNA fragmentation were not different between two freezing methods. CONCLUSION Cryopreservation of canine sperm cooled for 50 or 70 min following one step dilution in GFTG yields more viable sperm with lower PS translocation and freezing method using LN(2) vapor is more effective on progressive motility.
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Affiliation(s)
- Md A Rahman
- Laboratory of Theriogenology and Reproductive Biotechnologies, College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan, Republic of Korea
| | - S H Park
- Laboratory of Theriogenology and Reproductive Biotechnologies, College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan, Republic of Korea
| | - I J Yu
- Laboratory of Theriogenology and Reproductive Biotechnologies, College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan, Republic of Korea.
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119
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Kim HJ, Lee MH, Lee JE, Park SH, Lee ES, Kang YJ, Lee JH, Shin HN, Kim SI, Im SA, Ahn SH, Lee KS, Sohn J, Han W, Nam SJ. Abstract P1-12-09: The oncologic effect of a gonadotropin releasing hormone (GnRH) agonist for ovarian protection during breast cancer chemotherapy. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-12-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Recently, chemotherapy with a GnRH agonist was reported to protect against ovarian failure. This study was aimed at determining the oncologic effect of a GnRH agonist concurrent with chemotherapy for breast cancer patients.
Patients and Methods: A total of 1189 patients aged 20 to 40 years with stage I to III breast cancer who received (neo or adjuvant) chemotherapy from five hospitals in Korea from 2002 to 2012 were reviewed. A gonadotropin releasing hormone (GnRH) agonist was given to 410 patients for ovarian protection during chemotherapy (GnRH agonist group), and 779 patients received chemotherapy without ovarian protection (Chemotherapy alone group). A matching strategy was used to create matched sets of two groups by age, stage, hormone receptor status, Her2/neu status, neo or adjuvant chemotherapy, and institute.
Results: Survival analysis using Cox regression showed that the GnRH agonist group had better distant metastatic-free survival (HR=0.65, 95%CI 0.44-0.97) outcomes but similar disease free survival (HR=0.78, 95% CI 0.57-1.08) compared with the chemotherapy alone group. The survival benefit was significant for hormone receptor positive, Her2/neu negative breast cancer on distant metastasis (HR=0.44, 95% CI 0.20-0.99) and disease free survival (HR0.47 95% CI 0.23-0.93).
Conclusion: Ovarian protection using a GnRH agonist can be safely considered for premenopausal breast cancer patients for whom chemotherapy is planned.
Citation Format: Kim HJ, Lee MH, Lee JE, Park SH, Lee ES, Kang Y-J, Lee JH, Shin HN, Kim SI, Im SA, Ahn SH, Lee KS, Sohn J, Han W, Nam SJ. The oncologic effect of a gonadotropin releasing hormone (GnRH) agonist for ovarian protection during breast cancer chemotherapy. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-12-09.
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Affiliation(s)
- HJ Kim
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - MH Lee
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - JE Lee
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - SH Park
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - ES Lee
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - Y-J Kang
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - JH Lee
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - HN Shin
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - SI Kim
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - SA Im
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - SH Ahn
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - KS Lee
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - J Sohn
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - W Han
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
| | - SJ Nam
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Seoul National University College of Medicine, Seoul; Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine; Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea; Cancer Biostatistics Branch, Research Institute for National Cancer Control and Evaluation, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea; Seoul National University College of Medicine; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Medical Oncology, Yonsei University College of Medicine
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Kim HJ, Ahn SH, Nam SJ, Park SH, Ro JS, Im SA, Jung YS, Noh WC. Abstract P5-12-08: Time course of changes in serum FSH, serum estradiol, and menstruation in premenopausal patients with breast cancer taking tamoxifen after completing chemotherapy: A report from the ASTRRA study. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p5-12-08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND
Ovarian suppression with tamoxifen after chemotherapy is a promising therapeutic approach, particularly in young, high-risk breast cancer patients. Assessment of restoration of ovarian function is important with respect to the initiation of ovarian suppression.
METHODS
In total, 1289 women who remained or resumed premenopausal status after chemotherapy were randomized to receive 5 years of tamoxifen or 5 years of tamoxifen plus 2 years of ovarian suppression. Prospectively collected hormone data were available for 24 months after completing chemotherapy for 267 breast cancer patients without ovarian suppression.
RESULTS
At 6 months, a premenopausal status was identified in 56.6%, 36%, and 16.2% of patients using serum FSH, E2, and with menstruation bleeding, respectively, and about 30% more women achieved ovarian restoration using all three parameters during the 24-month follow-up. Ovarian function restoration differed significantly according to age group (log-rank, P<0.001 for all definitions). At 6 months, the distribution of patients according to hormone levels was as follows: group 1 (FSH <30 mIU/ml, E2 >20 pg/ml), 28.0%; group 2 (FSH <30 mIU/ml, E2 ≤20 pg/ml), 28.4%; group 3 (FSH ≥30 mIU/ml, E2 >20 pg/ml), 8.0%; and group 4 (FSH ≥30 mIU/ml, E2 ≤20 pg/ml), 35.6%. During the 24-month follow-up, the prevalence of menstruation restoration was higher in group 1 (71.6%) than in the other three groups. Restoration of serum E2 and menstrual bleeding occurred in 44% and 33% of patients in group 2, respectively; the corresponding percentages in group 4 were 40.6% and 28.7% (P<0.001).
CONCLUSIONS
Ovarian function should be monitored using serum FSH, serum E2, and menstruation history for at least 24 months after completing chemotherapy during tamoxifen treatment to establish eligibility for ovarian suppression.
Citation Format: Kim HJ, Ahn SH, Nam SJ, Park SH, Ro JS, Im SA, Jung YS, Noh WC. Time course of changes in serum FSH, serum estradiol, and menstruation in premenopausal patients with breast cancer taking tamoxifen after completing chemotherapy: A report from the ASTRRA study. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P5-12-08.
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Affiliation(s)
- HJ Kim
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - SH Ahn
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - SJ Nam
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - SH Park
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - JS Ro
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - SA Im
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - YS Jung
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - WC Noh
- Division of Breast and Endocrine, College of Medicine, University of Ulsan, Asan Medical Center; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Yonsei University College of Medicine, Seoul, Republic of Korea; Center for Breast Cancer, National Cancer Center, Goyang, Republic of Korea; Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
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Nazarian-Samani M, Kim HK, Park SH, Youn HC, Mhamane D, Lee SW, Kim MS, Jeong JH, Haghighat-Shishavan S, Roh KC, Kashani-Bozorg SF, Kim KB. Three-dimensional graphene-based spheres and crumpled balls: micro- and nano-structures, synthesis strategies, properties and applications. RSC Adv 2016. [DOI: 10.1039/c6ra07485e] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
3D spherical and crumpled-ball graphene-based architectures with diverse, fascinating properties and applications are reviewed for the first time.
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Affiliation(s)
- Masoud Nazarian-Samani
- School of Metallurgy and Materials Engineering
- College of Engineering
- University of Tehran
- Tehran
- IR Iran
| | - Hyun-Kyung Kim
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
- Department of Materials Science and Metallurgy
| | - Sang-Hoon Park
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN)
- Trinity College Dublin
- Dublin 2
- Ireland
| | - Hee-Chang Youn
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
| | - Dattakumar Mhamane
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
| | - Suk-Woo Lee
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
| | - Myeong-Seong Kim
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
| | - Jun-Hui Jeong
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
| | | | - Kwang-Chul Roh
- Energy Efficient Materials Team
- Energy and Environmental Division
- Korea Institute of Ceramic Engineering and Technology
- Seoul 153-801
- Republic of Korea
| | | | - Kwang-Bum Kim
- Department of Materials Science and Engineering
- Yonsei University
- Seoul 120-749
- Republic of Korea
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122
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Seo JH, Lee KN, Park SH, Choi CW, Kim BS, Shin SW, Kim YH, Kim JS. Retinoic Acid as a Radiosensitizer on the Head and Neck Squamous Cell Carcinoma Cell Lines. Cancer Res Treat 2015; 33:335-42. [PMID: 26680805 DOI: 10.4143/crt.2001.33.4.335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PURPOSE Retinoic acid is a substance that has previously been reported to increase radiosensitivity, but at concentrations likely to inhibit cell growth or to induce celluar differentiation. We choose head and neck cancer cell lines to investigate the role of retinoic acid as a radiosensitizer and to elucidate the mechanism through the changes in the expression of retinoid receptors and squamous cell differentiation marker. MATERIALS AND METHODS Three cell lines (PCI-50, SqCC/ Y1 and UMSCC-11B) were used. 7-AAD staining for apoptosis and Western blot analysis for RAR-alpha, beta, gamma, RXR-alpha, beta, gamma and involucrin were performed after various treatments (control, beta-all-trans-retinoic acid (t-RA) only (10 6 M), radiation only (3 Gy), radiation with t-RA). RESULTS The synergistic radiosensitivity effect of t-RA was seen only radioresistant UMSCC-11B cell line. Expression of RAR-beta was induced by t-RA in maily UMSCC- 11B cell line. RAR-alpha,gamma, and RXR-alpha, beta, gamma expression were not changed in all cell lines tested. Expression of involucrin was inhibited by t-RA in PCI-50 cell line but other two cell lines were not changed by t-RA treatment. CONCLUSION We found that only radioresistant cell line (UMSCC-11B) showed synergistic radiosensitivity effect by t-RA and this mechanism may be through RAR-beta expression induction.
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123
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Yoo JH, Oh JC, Oh HC, Park SH. Manipulation under Anesthesia for Stiffness after Total Knee Arthroplasty. Knee Surg Relat Res 2015; 27:233-9. [PMID: 26676186 PMCID: PMC4678244 DOI: 10.5792/ksrr.2015.27.4.233] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/01/2015] [Accepted: 08/17/2015] [Indexed: 11/18/2022] Open
Abstract
Purpose This study evaluated the incidence of manipulation under anesthesia (MUA) for stiffness after total knee arthroplasty (TKA) and the degree of joint motion recovery after MUA. Materials and Methods A total of 4,449 TKAs (2,973 patients) were performed between March 2000 and August 2014. Cases that underwent MUA for stiffness after TKA were reviewed. TKAs were performed using the conventional procedure in 329 cases and using the minimally invasive procedure in 4,120 cases. The preoperative range of joint motion, timing of manipulation, diagnosis and the range of joint motion before and after MUA were retrospectively investigated. Results MUA was carried out in 22 cases (16 patients), resulting in the incidence of 0.5%. The incidence after the conventional procedure was 1.2% and 0.4% after the minimally invasive procedure. In the manipulated knees, the preoperative range of motion (ROM) was 102.5°±26.7°, and the preoperative diagnosis was osteoarthritis in 19 cases, rheumatoid arthritis in two, and infection sequela in one. MUA was performed 4.7±3.0 weeks after TKA. The average ROM was 64.5°±13.5° before manipulation. At an average of 64.3±41.3 months after manipulation, the ROM was recovered to 113.4°±31.2°, which was an additional 49.9° improvement in flexion. Conclusions The satisfactory recovery of joint movement was achieved when MUA for stiffness was performed relatively early after TKA.
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Affiliation(s)
- Ju-Hyung Yoo
- Department of Orthopedic Surgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
| | - Jin-Cheol Oh
- Department of Orthopedic Surgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
| | - Hyun-Cheol Oh
- Department of Orthopedic Surgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
| | - Sang-Hoon Park
- Department of Orthopedic Surgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
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Shin JS, Kim JM, Kim JS, Min BH, Kim YH, Kim HJ, Jang JY, Yoon IH, Kang HJ, Kim J, Hwang ES, Lim DG, Lee WW, Ha J, Jung KC, Park SH, Kim SJ, Park CG. Long-term control of diabetes in immunosuppressed nonhuman primates (NHP) by the transplantation of adult porcine islets. Am J Transplant 2015; 15:2837-50. [PMID: 26096041 DOI: 10.1111/ajt.13345] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 04/02/2015] [Accepted: 04/04/2015] [Indexed: 01/25/2023]
Abstract
Pig islets are an alternative source for islet transplantation to treat type 1 diabetes (T1D), but reproducible curative potential in the pig-to-nonhuman primate (NHP) model has not been demonstrated. Here, we report that pig islet grafts survived and maintained normoglycemia for >6 months in four of five consecutive immunosuppressed NHPs. Pig islets were isolated from designated pathogen-free (DPF) miniature pigs and infused intraportally into streptozotocin-induced diabetic rhesus monkeys under pretreatment with cobra venom factor (CVF), anti-thymocyte globulin (ATG) induction and maintenance with anti-CD154 monoclonal antibody and low-dose sirolimus. Ex vivo expanded autologous regulatory T cells were adoptively transferred in three recipients. Blood glucose levels were promptly normalized in all five monkeys and normoglycemia (90-110 mg/dL) was maintained for >6 months in four cases, the longest currently up to 603 days. Intravenous glucose tolerance tests during the follow-up period showed excellent glucose disposal capacity and porcine C-peptide responses. Adoptive transfer of autologous regulatory T cells was likely to be associated with more stable and durable normoglycemia. Importantly, the recipients showed no serious adverse effects. Taken together, our results confirm the clinical feasibility of pig islet transplantation to treat T1D patients without the need for excessive immunosuppressive therapy.
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Affiliation(s)
- J S Shin
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea.,Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J M Kim
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - J S Kim
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea.,Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - B H Min
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - Y H Kim
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - H J Kim
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - J Y Jang
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea
| | - I H Yoon
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - H J Kang
- Department of Laboratory Medicine, Hallym University College of Medicine, Anyang, Korea
| | - J Kim
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - E S Hwang
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - D G Lim
- National Medical Centre, Seoul, Korea
| | - W W Lee
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - J Ha
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - K C Jung
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - S H Park
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - S J Kim
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Myong-Ji Hospital, Koyang-si, Kyeonggi-do, Korea
| | - C G Park
- Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea.,Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.,Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea.,Biomedical Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Lim SH, Kim TW, Hong YS, Han SW, Lee KH, Kang HJ, Hwang IG, Lee JY, Kim HS, Kim ST, Lee J, Park JO, Park SH, Park YS, Lim HY, Jung SH, Kang WK. A randomised, double-blind, placebo-controlled multi-centre phase III trial of XELIRI/FOLFIRI plus simvastatin for patients with metastatic colorectal cancer. Br J Cancer 2015; 113:1421-6. [PMID: 26505681 PMCID: PMC4815882 DOI: 10.1038/bjc.2015.371] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [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: 06/23/2015] [Revised: 09/22/2015] [Accepted: 10/05/2015] [Indexed: 12/19/2022] Open
Abstract
Background: The purpose of this randomised phase III trial was to evaluate whether the addition of simvastatin, a synthetic 3-hydroxy-3methyglutaryl coenzyme A reductase inhibitor, to XELIRI/FOLFIRI chemotherapy regimens confers a clinical benefit to patients with previously treated metastatic colorectal cancer. Methods: We undertook a double-blind, placebo-controlled phase III trial of 269 patients previously treated for metastatic colorectal cancer and enrolled in 5 centres in South Korea. Patients were randomly assigned (1 : 1) to one of the following groups: FOLFIRI/XELIRI plus simvastatin (40 mg) or FOLFIRI/XELIRI plus placebo. The FOLFIRI regimen consisted of irinotecan at 180 mg m−2 as a 90-min infusion, leucovorin at 200 mg m−2 as a 2-h infusion, and a bolus injection of 5-FU 400 mg m−2 followed by a 46-h continuous infusion of 5-FU at 2400 mg m−2. The XELIRI regimen consisted of irinotecan at 250 mg m−2 as a 90-min infusion with capecitabine 1000 mg m−2 twice daily for 14 days. The primary end point was progression-free survival (PFS). Secondary end points included response rate, duration of response, overall survival (OS), time to progression, and toxicity. Results: Between April 2010 and July 2013, 269 patients were enrolled and assigned to treatment groups (134 simvastatin, 135 placebo). The median PFS was 5.9 months (95% CI, 4.5–7.3) in the XELIRI/FOLFIRI plus simvastatin group and 7.0 months (95% CI, 5.4–8.6) in the XELIRI/FOLFIRI plus placebo group (P=0.937). No significant difference was observed between the two groups with respect to OS (median, 15.9 months (simvastatin) vs 19.9 months (placebo), P=0.826). Grade ⩾3 nausea and anorexia were noted slightly more often in patients in the simvastatin arm compared with with the placebo arm (4.5% vs 0.7%, 3.0% vs 0%, respectively). Conclusions: The addition of 40 mg simvastatin to the XELIRI/FOLFIRI regimens did not improve PFS in patients with previously treated metastatic colorectal cancer nor did it increase toxicity.
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Affiliation(s)
- S H Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - T W Kim
- Division of Hematology-Oncology, Department of Medicine, Asan Medical Center, Seoul, South Korea
| | - Y S Hong
- Division of Hematology-Oncology, Department of Medicine, Asan Medical Center, Seoul, South Korea
| | - S-W Han
- Division of Hematology-Oncology, Department of Medicine, Seoul National University Hospital, Seoul, South Korea
| | - K-H Lee
- Division of Hematology-Oncology, Department of Medicine, Seoul National University Hospital, Seoul, South Korea
| | - H J Kang
- Division of Hematology-Oncology, Department of Medicine, Korea Cancer Center Hospital, Seoul, South Korea
| | - I G Hwang
- Division of Hematology-Oncology, Department of Medicine, Chungang University Hospital, Seoul, South Korea
| | - J Y Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - H S Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - S T Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - J Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - S H Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Y S Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - H Y Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - S-H Jung
- Department of Biostatistics and Bioinformatics, Duke University, Durham, NC, USA.,Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - W K Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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Kim JY, Kim KH, Kim HK, Park SH, Roh KC, Kim KB. Template-Free Synthesis of Ruthenium Oxide Nanotubes for High-Performance Electrochemical Capacitors. ACS Appl Mater Interfaces 2015; 7:16686-16693. [PMID: 26161814 DOI: 10.1021/acsami.5b04360] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One-dimensional, hydrous ruthenium oxide nanotubes (RuO2·1.84H2O) have been successfully achieved using a template-free, microwave-hydrothermal process. These were found to be amorphous in nature and have a large specific surface area of 250 m(2)·g(-1), producing a specific and volumetric capacitance of 511 F·g(-1) and 531 F·cm(-3), respectively, at a discharging current density of 0.5 A·g(-1). When used as an electrode material in an electrochemical capacitor or ultracapacitor, they produced a significant improvement in capacitance, rate capability, and cyclability that can be attributed to the hollow nature of tubes allowing greater contact between the active surface of the electrode and the electrolyte.
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Affiliation(s)
- Ji-Young Kim
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
| | - Kwang-Heon Kim
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
| | - Hyun-Kyung Kim
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
| | - Sang-Hoon Park
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
| | - Kwang Chul Roh
- ‡Energy Efficient Materials Team, Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, 101, Soho-ro, Jinju-si, Gyeongsangnam-do 660-031, Republic of Korea
| | - Kwang-Bum Kim
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
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Son Y, Lee JH, Cheong YK, Jung HC, Jeong SO, Park SH, Pae HO. Piceatannol, a natural hydroxylated analog of resveratrol, promotes nitric oxide release through phosphorylation of endothelial nitric oxide synthase in human endothelial cells. Eur Rev Med Pharmacol Sci 2015; 19:3125-3132. [PMID: 26367737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Endothelial dysfunction associated with many cardiovascular diseases is largely due to reduced nitric oxide (NO) derived from endothelial NO synthase (eNOS). Piceatannol (trans-3,4,3',5'-tetrahydroxystilbene; Pic) is reported to have cardiovascular therapeutic effects. However, the cellular and molecular mechanisms underlying the cardioprotective effects of Pic are still unclear. Here, we investigated whether Pic could influence endothelial NO release in human umbilical vein endothelial cells (HUVECs). MATERIALS AND METHODS In HUVECs exposed to Pic, NO production and phosphorylation of eNOS and protein kinase B (Akt) were determined by using a commercially available NO assay kit and Western blot analysis, respectively. RESULTS Pic stimulated dose- and time-dependent NO production via eNOS phosphorylation. Pic also stimulated dose-dependent phosphorylation of Akt. Interestingly, NO production and eNOS phosphorylation in response to Pic were significantly abolished by the phosphoinositide 3-kinase (PI3K)/Akt inhibitor LY294002. CONCLUSIONS Pic is capable of inducing eNOS phosphorylation and the subsequent NO release, presumably, by activating PI3K/Akt pathway. The potential efficacy of Pic, a natural hydroxylated analog and a metabolite of resveratrol, may aid in the prevention of cardiovascular diseases characterized by endothelial dysfunction.
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Affiliation(s)
- Y Son
- Department of Anesthesiology and Pain Medicine, Wonkwang University School of Medicine, Iksan, South Korea.
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Lee HJ, Boo SJ, Jung KW, Han S, Seo SY, Koo HS, Yoon IJ, Park SH, Yang DH, Kim KJ, Ye BD, Byeon JS, Yang SK, Kim JH, Myung SJ. Long-term efficacy of biofeedback therapy in patients with dyssynergic defecation: results of a median 44 months follow-up. Neurogastroenterol Motil 2015; 27:787-95. [PMID: 25807997 DOI: 10.1111/nmo.12552] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 02/22/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND The beneficial effect of biofeedback therapy (BFT) over a period of more than 2 years has not been studied in a large group of patients. The aim of this study was to evaluate the long-term efficacy of BFT for dyssynergic defecation (DD). METHODS We evaluated the results for 347 consecutive constipated patients with DD who underwent BFT for a median of five sessions between 2004 and 2009. Initial responses were assessed immediately after the completion of BFT. A responder was defined as a subject with at least a three-point improvement from before to after BFT on an 11-point global bowel satisfaction (GBS) scale, or a two-point improvement if the baseline GBS was more than six points. The probability of remaining a responder was estimated by non-parametric maximum likelihood estimation. KEY RESULTS The initial response rate to BFT was 72.3% (n = 251), Parkinson's disease and higher baseline GBS scores were associated with initial non-response. The long-term efficacy of BFT was analyzed in 103 patients who were followed up for more than 6 months; the initial effects of BFT were maintained in 85 of the patients (82.5%) during a median of 44 months of follow-up (IQR = 12-68). The probability of remaining a responder was 60% at 2 years, and 58% at 5 years. CONCLUSIONS & INFERENCES The efficacy of BFT is maintained for more than 2 years after BFT in a considerable proportion of constipated patients with DD. BFT is effective and durable treatment for managing DD.
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Affiliation(s)
- H J Lee
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.,Health Screening and Promotion Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-J Boo
- Department of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea
| | - K W Jung
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S Han
- Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S Y Seo
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - H S Koo
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - I J Yoon
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S H Park
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - D-H Yang
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K-J Kim
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - B D Ye
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - J-S Byeon
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-K Yang
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - J-H Kim
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-J Myung
- Department of Gastroenterology, Asan Digestive Disease Research Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Seo JG, Moon YW, Kim SM, Park SH. How to minimize rotational conflict between femoral & tibial component in total knee arthroplasty: the use of femoro-tibial axial synchronizer (Linker). Yonsei Med J 2015; 56:454-9. [PMID: 25683995 PMCID: PMC4329358 DOI: 10.3349/ymj.2015.56.2.454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The purpose of this study was to investigate the correlation between rotational axes of femur and tibia with the use of Linker. MATERIALS AND METHODS This study was carried out from August 2009 to February 2010 on 54 patients (106 knees), who were diagnosed with simultaneous bilateral total knee arthroplasty. With the use of postoperative computed tomography scans, it was investigated how much the rotational angle of femoral and tibial components matched. RESULTS The tibial component was internally rotated for the femoral component at an angle of 0.8°. The femoral component was externally rotated for the surgical transepicondylar axis (TEA) at an angle of 1.6 (range: from 4.8° of internal rotation to 7.9° of external rotation, SD=2.2°), and the tibial component was externally rotated for the surgical TEA at an average angle of 0.9 (range: from 5.1° of internal rotation to 8.3° of external rotation, SD=3.1°). CONCLUSION The femoro-tibial synchronizer helped to improve the orientation and positioning of both femoral component and tibial component, and also increase the correlation of the rotational axes of the two components.
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Affiliation(s)
- Jai-Gon Seo
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young-Wan Moon
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Min Kim
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Hoon Park
- Department of Orthopaedic Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
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130
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Song IA, Seo KS, Oh AY, No HJ, Hwang JW, Jeon YT, Park SH, Do SH. Timing of reversal with respect to three nerve stimulator end-points from cisatracurium-induced neuromuscular block. Anaesthesia 2015; 70:797-802. [PMID: 26580249 DOI: 10.1111/anae.13044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2015] [Indexed: 11/28/2022]
Abstract
After elective ear surgery with cisatracurium neuromuscular blockade, 48 adults were randomly assigned to receive neostigmine: (a) at appearance of the fourth twitch of a 'train-of-four'; (b) at loss of fade to train-of-four; or (c) at loss of fade to double-burst stimulation, all monitored using a TOF-Watch SX® on one arm. For each of these conditions, the recovery from train-of-four (TOF) ratio was measured in parallel objectively using a TOF-Watch SX placed on the contralateral arm. The median (IQR [range]) time from administration of reversal to a train-of-four ratio ≥ 0.9 was 11 (9-15.5 [2-28]) min, 8 (4-13.5 [1-25]) min and 7 (4-10 [2-15]) min in the three groups, respectively. This recovery time was significantly shorter when reversal was given at loss of fade to double-burst stimulation (c), than when given at the appearance of the fourth twitch (a), p = 0.046. However, the total time to extubation may be unaffected as it takes longer for fade to be lost after double-burst stimulation than for four twitches subjectively to appear.
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Affiliation(s)
- I A Song
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - K S Seo
- Department of Dental Anesthesiology, Seoul National University School of Dentistry, Seoul, Korea
| | - A Y Oh
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - H J No
- Department of Anesthesiology, Seoul National University College of Medicine, Seoul, Korea
| | - J W Hwang
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Y T Jeon
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - S H Park
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - S H Do
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
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Park SH, Chae JK, Kim EJ, Park K. A case of panniculitis caused by Mycobacterium massiliense mimicking erythema induratum. Br J Dermatol 2014; 173:235-8. [PMID: 25494865 DOI: 10.1111/bjd.13606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2014] [Indexed: 12/01/2022]
Abstract
Among nontuberculosis mycobacteria (NTM), rapidly growing mycobacteria (RGM) are the most common causative agents of soft tissue infection. Mycobacterium massiliense, a new species of NTM, was isolated in 2004. Due to the lower virulence of RGM, M. massiliense infection is rare in the general population. Here, we report a case of multiple infective panniculitis, due to M. massiliense, mimicking erythema induratum in a patient with Cushing syndrome. The organism was identified using traditional mycobacterial culturing and staining methods as well as molecular approaches, including erythromycin ribosome transferase gene polymerase chain reaction. The patient was treated with clarithromycin for 9 months, based on antibiotic susceptibility testing.
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Affiliation(s)
- S H Park
- Department of Dermatology, Wonkwang University School of Medicine and Hospital, Muwang-ro 895, Iksan, Jeonbuk, 570-711, Korea
| | - J K Chae
- Department of Dermatology, Wonkwang University School of Medicine and Hospital, Muwang-ro 895, Iksan, Jeonbuk, 570-711, Korea
| | - E J Kim
- Department of Dermatology, Wonkwang University School of Medicine and Hospital, Muwang-ro 895, Iksan, Jeonbuk, 570-711, Korea
| | - K Park
- Department of Dermatology, Wonkwang University School of Medicine and Hospital, Muwang-ro 895, Iksan, Jeonbuk, 570-711, Korea
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Park SH, Sung JH, Kim EJ, Chung N. Berberine induces apoptosis via ROS generation in PANC-1 and MIA-PaCa2 pancreatic cell lines. ACTA ACUST UNITED AC 2014; 48:111-9. [PMID: 25517919 PMCID: PMC4321216 DOI: 10.1590/1414-431x20144293] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [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: 08/05/2014] [Accepted: 09/26/2014] [Indexed: 02/08/2023]
Abstract
Pancreatic cancer is the fourth leading cause of cancer death. Gemcitabine is widely
used as a chemotherapeutic agent for the treatment of pancreatic cancer, but the
prognosis is still poor. Berberine, an isoquinoline alkaloid extracted from a variety
of natural herbs, possesses a variety of pharmacological properties including
anticancer effects. In this study, we investigated the anticancer effects of
berberine and compared its use with that of gemcitabine in the pancreatic cancer cell
lines PANC-1 and MIA-PaCa2. Berberine inhibited cell growth in a dose-dependent
manner by inducing cell cycle arrest and apoptosis. After berberine treatment, the G1
phase of PANC-1 cells increased by 10% compared to control cells, and the G1 phase of
MIA-PaCa2 cells was increased by 2%. Whereas gemcitabine exerts antiproliferation
effects through S-phase arrest, our results showed that berberine inhibited
proliferation by inducing G1-phase arrest. Berberine-induced apoptosis of PANC-1 and
MIA-PaCa2 cells increased by 7 and 2% compared to control cells, respectively.
Notably, berberine had a greater apoptotic effect in PANC-1 cells than gemcitabine.
Upon treatment of PANC-1 and MIA-PaCa2 with berberine at a half-maximal inhibitory
concentration (IC50), apoptosis was induced by a mechanism that involved
the production of reactive oxygen species (ROS) rather than caspase 3/7 activation.
Our findings showed that berberine had anti-cancer effects and may be an effective
drug for pancreatic cancer chemotherapy.
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Affiliation(s)
- S H Park
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Korea
| | - J H Sung
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - E J Kim
- Department of Clinical Laboratory Science, Ansan University, Ansan, Korea
| | - N Chung
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Korea
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Abstract
PURPOSE This study aimed to analyze the clinical features of lumbar hernia reported in South Korea and compare these features with those reported in foreign literature. METHODS From January 1968 through December 2013, 13 cases reported in South Korea were included in the study. The variables compared were age, sex, main symptoms at hospital visit, etiology, location, herniated contents, lateralization, defect size, diagnostic methods, surgical methods, surgical opinions, and recurrence. RESULTS In the South Korean cases, women outnumbered men (3.3:1) and no significant differences were found in the herniated side (left:right, 1.1:1). In contrast, in the foreign cases, men outnumbered women (3:1) and left-sided hernia was dominant (2:1). Moreover, in most of the foreign cases, patients were aged 50-70 years, whereas in the South Korean cases, none of the patients were in their 50 s. However, no substantial differences were found in etiology, anatomical locations, symptoms, and herniated contents. CONCLUSION This research revealed that few clinical features of lumbar hernias in South Korea differ from those reported in foreign literature. Thirteen cases were analyzed in the present study, and results obtained from such a small sample size cannot be generalized with certainty. Therefore, more cases should be collected for a definitive analysis. Despite this limitation, this study is important because it is the first attempt to collect and analyze the clinical features of lumbar hernia in South Korea. This study will serve as a basis for future studies investigating the clinical features of lumbar hernia cases in South Korea.
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Affiliation(s)
- S H Park
- Department of Clinical Pharmacy, College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H S Chung
- Department of Surgery, Gwangju Veterans Hospital, 99 Cheomdanwolbong-ro, Gwangsan-gu, Gwangju, South Korea.
- Department of Surgery, College of Medicine, Chosun University, Gwangju, South Korea.
| | - S H Song
- Department of Surgery, Gwangju Veterans Hospital, 99 Cheomdanwolbong-ro, Gwangsan-gu, Gwangju, South Korea
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Seo JG, Moon YW, Park SH, Han KY, Kim SM. Primary total knee arthroplasty in infection sequelae about the native knee. J Arthroplasty 2014; 29:2271-5. [PMID: 24703782 DOI: 10.1016/j.arth.2014.01.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 10/25/2013] [Accepted: 01/14/2014] [Indexed: 02/01/2023] Open
Abstract
The aim of this study is to assess the results of primary total knee arthroplasty (TKA) after bone or joint sepsis about the native knee and to analyze the risk factors of periprosthetic infection. Sixty-two patients (62 knees), considered to have prior sepsis history to be resolved, underwent primary TKA and were followed during a mean of 6.1years (range, 2-10.4years). Of the 62 patients, periprosthetic infection occurred in 6 after primary TKA (9.7%). Five of 6 patients grew the same organism as prior infection. The number of prior surgeries undertaken for deep infection was found to be an independent risk factor of periprosthetic infection.
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Affiliation(s)
- Jai-Gon Seo
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young-Wan Moon
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang-Hoon Park
- Department of Orthopaedic Surgery, National Health Insurance Service Ilsan Hospital, Ilsan, Korea
| | - Kye-Young Han
- Department of Orthopaedic Surgery, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Sang-Min Kim
- Department of Orthopaedic Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Park SH, Ricke SC. Development of multiplex PCR assay for simultaneous detection of Salmonella genus, Salmonella subspecies I, Salm. Enteritidis, Salm. Heidelberg and Salm. Typhimurium. J Appl Microbiol 2014; 118:152-60. [PMID: 25358641 DOI: 10.1111/jam.12678] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/02/2014] [Accepted: 10/21/2014] [Indexed: 01/10/2023]
Abstract
AIMS The aim of this research was to develop multiplex PCR assay that could simultaneously detect Salmonella genus, Salmonella subsp. I, Salm. Enteritidis, Heidelberg and Typhimurium because these Salmonella serovars are the most common isolates associated with poultry products. METHODS AND RESULTS Five primers were utilized to establish multiplex PCR and applied to Salmonella isolates from chickens and farm environments. These isolates were identified as Salmonella subsp. I and 16 of 66 isolates were classified as Salm. Enteritidis, while Heidelberg or Typhimurium was not detected. We also spiked three Salmonella strains on chicken breast meat to evaluate the specificity and sensitivity of multiplex PCR as well as qPCR to optimize quantification of Salmonella in these samples. The optimized multiplex PCR and qPCR could detect approx. 2·2 CFU of Salmonella per gram after 18 h enrichment. CONCLUSIONS The multiplex PCR and qPCR would provide rapid and consistent results. Also, these techniques would be useful for the detection and quantification of Salmonella in contaminated poultry, foods and environmental samples. SIGNIFICANCE AND IMPACT OF THE STUDY The strategy for the rapid detection of Salmonella serovars in poultry is needed to further reduce the incidence of salmonellosis in humans. The optimized multiplex PCR will be useful to detect prevalent Salmonella serovars in poultry products.
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Affiliation(s)
- S H Park
- Cell and Molecular Biology Program, Department of Food Science, University of Arkansas, Fayetteville, AR, USA; Center for Food Safety, Department of Food Science, University of Arkansas, Fayetteville, AR, USA
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Lim DH, Park SH, Baik SJ, Lee HA, Lee WK, Kong KA, Park HS, Jung-Choi KH. Population Attributable Fraction of Lower Education for Mortality in Korea with Improvement of Educational Attainment and No Improvement in Mortality Inequalities. Eur J Public Health 2014. [DOI: 10.1093/eurpub/cku165.090] [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: 11/14/2022] Open
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137
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Park SH, Jeong S, Lee DH. Bile duct perforation caused by an uncovered metal stent treated by placement of a covered metal stent in a patient with pancreatic cancer. Endoscopy 2014; 46 Suppl 1 UCTN:E240-1. [PMID: 24853437 DOI: 10.1055/s-0033-1344589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S H Park
- Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, Incheon, South Korea
| | - S Jeong
- Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, Incheon, South Korea
| | - D H Lee
- Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, Incheon, South Korea
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138
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Kwon Y, Park SH, Kim JW, Ho Y, Jeon HM, Bang MJ, Koh SB, Kim JH, Eom GM. Quantitative evaluation of parkinsonian rigidity during intra-operative deep brain stimulation. Biomed Mater Eng 2014; 24:2273-81. [PMID: 25226927 DOI: 10.3233/bme-141040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study aims at the quantification of fine change in parkinsonian rigidity at the wrist during deep brain stimulation (DBS) using a portable measurement system and objective mechanical measures. The rigidity of fourteen limbs was evaluated during DBS surgery. The resistive torque to imposed movement was measured for every setting where a reduction in rigidity was perceived by a neurologist. Quantitative mechanical measures derived from experimental data included viscoelastic properties, work, impulse and mechanical impedance. Most mechanical measures could discriminate the optimal setting from baseline (electrode at stereotactic initial position without electrical stimulation) and the highest significance was achieved by viscous damping constant (p<0.001). Spearman correlation coefficients between mechanical measures and clinical score for multiple settings (averaged for 14 limbs) were 0.51-0.77 and the best correlation was shown for viscosity (ρ=0.77 ± 0.22). The results suggest that intraoperative quantification of rigidity during DBS surgery is possible with the suggested system and measures, which would be helpful for the adjustment of electrode position and stimulation parameters.
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Affiliation(s)
- Yuri Kwon
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Sang-Hoon Park
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Ji-Won Kim
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Yeji Ho
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Hyeong-Min Jeon
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Min-Jung Bang
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
| | - Seong-Beom Koh
- Department of Neurology, Korea University College of Medicine, Seoul, Korea
| | - Jong-Hyun Kim
- Department of Neurosurgery, Korea University College of Medicine, Seoul, Korea
| | - Gwang-Moon Eom
- School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea Research Institute of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea
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139
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Cho YU, Chi HS, Park SH, Jang S, Kim YJ, Park CJ. Body fluid cellular analysis using the Sysmex XN-2000 automatic hematology analyzer: focusing on malignant samples. Int J Lab Hematol 2014; 37:346-56. [PMID: 25212101 DOI: 10.1111/ijlh.12292] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [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: 05/03/2014] [Accepted: 08/05/2014] [Indexed: 01/22/2023]
Abstract
INTRODUCTION The majority of previous studies on body fluid (BF) mode of automatic hematology analyzer used nonmalignant BF samples. Here, we evaluated the BF mode on the recently launched Sysmex XN for counting blood cells, especially for malignant samples. METHODS A total of 405 BF specimens including 125 malignant samples were analyzed using both the automated method and manual microscopy. RESULTS In non-cerebrospinal fluids (CSF) samples, there was an agreement between two methods for WBC, RBC, polymorphonuclear, and mononuclear cell counts (R(2) = 0.96, 0.94, 0.88, and 0.88, respectively). CSF samples showed slightly poorer correlations than other fluids. Exclusion of malignant samples significantly improved correlations in non-CSF samples, but not in CSF samples. High fluorescence-BF (HF-BF) cells were identified significantly more frequently in malignant samples compared to benign samples (17.8 and 4.15/100 WBC, respectively; P < 0.001). Receiver operating characteristic curve analysis demonstrated an HF-BF cell AUC of 0.791 using a cutoff value of 6.9/100 WBC for detecting malignant samples. CONCLUSION The BF mode on the Sysmex XN could be an alternative method for the manual counts in the BF analysis with a few drawbacks. However, if a concentration of HF-BF cells is greater than the given threshold, microscopic examination should be subsequently performed.
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Affiliation(s)
- Y-U Cho
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, South Korea
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140
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Oh HG, Kang YR, Lee HY, Kim JH, Shin EH, Lee BG, Park SH, Moon DI, Kim OJ, Lee IA, Choi J, Lee JE, Park KH, Suh JW. Ameliorative effects of Monascus pilosus-fermented black soybean (Glycine max L. Merrill) on high-fat diet-induced obesity. J Med Food 2014; 17:972-8. [PMID: 25115132 PMCID: PMC4152779 DOI: 10.1089/jmf.2012.2740] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 04/22/2014] [Indexed: 01/03/2023] Open
Abstract
The purpose of this study was to examine the antiobesity effects of Monascus pilosus-fermented black soybean (F-BS) in C57BL/6 mice with high-fat diet (HFD)-induced obesity. F-BS (oral, 0.5 and 1.0 g/kg per body weight, twice per day) ameliorated obesity by reducing body and liver weight increases, and regulating blood glucose and cholesterol levels in C57BL/6 mice fed a control or HFD with oral administration of F-BS for 12 weeks. F-BS suppressed the growth of epididymal, retroperitoneal, and perirenal fat pads by preventing increases in the adipocyte size. Moreover, the levels of blood glucose, total cholesterol, and leptin were significantly lowered by F-BS administration in a dose-dependent manner. These results indicated that F-BS is a beneficial food supplement for preventing obesity, controlling blood glucose, and lowering cholesterol. Future research strategies should address the mechanisms that selectively regulate obesity, including hyperglycemia and hypercholesterolemia.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Ok-Jin Kim
- Animal Disease Research Unit, College of Life Science and Natural Resources, Wonkwang University, Iksan, Korea
- Center for Animal Resources Development, Wonkwang University, Iksan, Korea
| | - In-Ae Lee
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University, Yongin, Korea
| | - Jongkeun Choi
- Department of Cosmetic Science, Chungwoon University, Hongseoung, Korea
| | - Ji-Ean Lee
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University, Yongin, Korea
| | - Kwang-Hyun Park
- Department of Oriental Pharmaceutical Development, Nambu University, Gwangju, Korea
| | - Joo-Won Suh
- Center for Nutraceutical and Pharmaceutical Materials, Myongji University, Yongin, Korea
- Division of Bioscience and Bioinformatics, College of Natural Science, Myongji University, Yongin, Korea
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141
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Choi SH, Roulet JF, Heintze SD, Park SH. Influence of Cavity Preparation, Light-curing Units, and Composite Filling on Intrapulpal Temperature Increase in an In Vitro Tooth Model. Oper Dent 2014; 39:E195-205. [DOI: 10.2341/13-068-l] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
This study examined the effect of both the tooth substance and restorative filling materials on the increase in pulp chamber temperature when using light-curing units with different power densities.
The tip of a temperature sensor was positioned on the pulpal dentinal wall of the buccal side of a maxillary premolar. Metal tubes were inserted in the palatal and buccal root of the tooth, one for water inflow and the other for water outflow. Polyethylene tubes were connected from the metal tubes to a pump to control the flow rate. For the unprepared tooth group (group 1), the tooth was light-cured from the buccal side using two light-curing units (three curing modes): the VIP Junior (QTH, BISCO, Schaumburg, IL, USA) and the Bluephase LED light-curing units (two modes: LEDlow and LEDhigh; Ivoclar Vivadent, Schaan, Liechtenstein). The power densities of each light-curing unit for the LEDlow, QTH, and LEDhigh modes were 785 mW/cm2, 891 mW/cm2, and 1447 mW/cm2, respectively. All light-curing units were activated for 60 seconds. For the prepared tooth group (group 2), a Class V cavity, 4.0 mm in width by 4.0 mm in height by 1.8 mm in depth in size, was prepared on the buccal surface of the same tooth for the temperature measurement. The light-curing and temperature measurements were performed using the same methods used in group 1.
The cavity prepared in group 2 was filled with a resin composite (Tetric N Ceram A3 shade, Ivoclar Vivadent) (group 3) or a flowable composite (Tetric N Flow with A3 shade, Ivoclar Vivadent) (group 4). The light-curing and temperature measurements were performed for these groups using the same methods used for the other groups.
The highest intrapulpal temperature (TMAX) was measured, and a comparison was conducted between the groups using two-way analysis of variance with a post hoc Tukey test at the 95% confidence level.
The TMAX values were as follows: 38.4°C (group 1), 39.0°C (group 2), 39.8°C (group 3), and 40.3°C (group 4) for the LEDlow mode. For the QTH mode, the TMAX values were 40.1°C (group 1), 40.4°C (group 2), 40.9°C (group 3), and 41.4°C (group 4). For the LEDhigh mode, the TMAX values were 43.3°C (group 1), 44.5°C (group 2), 44.7°C (group 3), and 45.3°C (group 4). The statistical analysis revealed the following: the TMAX values were arranged by mode in the following manner: LEDlow < QTH < LEDhigh (p<0.05) and group 1 < group 2 ≤ group 3 ≤ group 4 (p<0.05).
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Affiliation(s)
- SH Choi
- Seung-ho Choi, PhD, Yonsei University, College of Dentistry, Department of Conservative Dentistry, Oral Science Research Center, Seoul, Republic of Korea
| | - JF Roulet
- Jean-Francois Roulet, EBM, University of Florida, College of Dentistry, Gainesville, FL, USA
| | - SD Heintze
- Siegward D Heintze, Ivoclar Vivadent, Schaan, Liechtenstein
| | - SH Park
- Sung-ho Park, PhD, Yonsei University, Conservative Dentistry, Oral Science Research Center, Seoul, Republic of Korea
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142
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Yoo JH, Park BK, Han CD, Oh HC, Park SH. Minimum 5-year Follow-up Results of Minimally Invasive Total Knee Arthroplasty Using Mini-Keel Modular Tibial Implant. Knee Surg Relat Res 2014; 26:149-54. [PMID: 25229044 PMCID: PMC4163572 DOI: 10.5792/ksrr.2014.26.3.149] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 06/03/2014] [Accepted: 06/16/2014] [Indexed: 11/11/2022] Open
Abstract
Purpose To evaluate the minimum 5-year mid-term clinical and radiological results of minimally invasive surgery total knee arthroplasty (MIS-TKA) using a mini-keel modular tibia component. Materials and Methods We retrospectively evaluated 254 patients (361 cases) who underwent MIS-TKA between 2005 and 2006. The latest clinical and radiological assessments were done in 168 cases that had been followed on an outpatient basis for more than 5 postoperative years. Clinical results were assessed using the Hospital for Special Surgery (HSS) score and Knee Society score. Radiological evaluation included measurements of knee alignment. Results The average postoperative knee range of motion and HSS score were 134.3°±12.4° and 92.7°±7.0°, respectively. The average postoperative femorotibial angle and tibial component alignment angle were 5.2°±1.7° valgus and 90.2°±1.6°, respectively. The average tibial component posterior inclination was 4.8°±2.1°. The percentage of cases with tibial component alignment angle of 90°±3° was 96.1%, and that with the femorotibial angle of 6°±3° valgus was 94.0%. Radiolucent lines were observed in 20 cases (12.0%): around the femur, tibia, and patella in 14 cases, 10 cases, and 1 case, respectively. However, they were less than 2 mm and non-progressive in all cases. The survival rate was 99.4% and there was no implant-related revision. Conclusions MIS-TKA using a mini-keel modular tibial plate showed satisfactory results, a high survival rate, and excellent clinical and radiological results in the mid-term follow-up.
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Affiliation(s)
- Ju-Hyung Yoo
- Department of Orthopedic Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Byoung-Kyu Park
- Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Chang-Dong Han
- Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun-Cheol Oh
- Department of Orthopedic Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Sang-Hoon Park
- Department of Orthopedic Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
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143
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Cross KJ, Huq NL, Park SH, Park JS, Pham P, Quah M, Ranjan M, Reynolds EC. Bioinformatic investigation of the cost management strategies of five oral microbes. Mol Oral Microbiol 2014; 30:87-96. [PMID: 25052707 DOI: 10.1111/omi.12071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2014] [Indexed: 01/08/2023]
Abstract
Some amino acids are more energetically costly to synthesize de novo, therefore many microbes have evolved to regulate the metabolic expenditure of the cell and reduce the energy burden of extracellular unrecyclable proteins. Several oral bacterial species take up amino acids and peptides obtained from proteolysis of host proteins and hence do not rely only on de novo synthesis. The aim of this study was to investigate if five oral bacterial species implement cost management strategies to reduce the energy burden of extracellular unrecyclable proteins. Since the relative de novo amino acid synthesis costs are proportional to the masses of the amino acids, the energy costs of producing proteins were assessed by calculating the mean amino acid mass for each protein. For Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia, Prevotella intermedia and Streptococcus sanguinis, the outer membrane/extracellular proteins are made up of a much larger percentage of lower average mass amino acids whereas cytoplasmic proteins are made up of a larger proportion of higher average mass amino acid residues. These results are consistent with the five oral bacterial species employing energy-saving mechanisms in the production of extracellular unrecyclable proteins. Interestingly, the P. gingivalis and S. sanguinis genomes exhibited significantly lower predicted mean amino acid masses compared with those of the genomes of the other three species, suggesting that this may provide them with an energy advantage with respect to protein biosynthetic cost.
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Affiliation(s)
- K J Cross
- Oral Health CRC, Melbourne Dental School, Bio21 Institute, The University of Melbourne, Melbourne, Vic., Australia
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144
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Kim SY, Kim TS, Park SH, Lee MR, Eun HJ, Baek SK, Ko YG, Kim SW, Seong HH, Campbell KHS, Lee JH. Siberian Sturgeon Oocyte Extract Induces Epigenetic Modifications of Porcine Somatic Cells and Improves Developmental Competence of SCNT Embryos. Asian-Australas J Anim Sci 2014; 27:266-77. [PMID: 25049951 PMCID: PMC4093206 DOI: 10.5713/ajas.2013.13699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 11/29/2013] [Accepted: 11/25/2013] [Indexed: 11/27/2022]
Abstract
Somatic cell nuclear transfer (SCNT) has generally demonstrated that a differentiated cell can convert into a undifferentiated or pluripotent state. In the SCNT experiment, nuclear reprogramming is induced by exposure of introduced donor nuclei to the recipient cytoplasm of matured oocytes. However, because the efficiency of SCNT still remains low, a combination of SCNT technique with the ex-ovo method may improve the normal development of SCNT embryos. Here we hypothesized that treatment of somatic cells with extracts prepared from the germinal vesicle (GV) stage Siberian sturgeon oocytes prior to their use as nuclear donor for SCNT would improve in vitro development. A reversible permeability protocol with 4 μg/mL of digitonin for 2 min at 4°C in order to deliver Siberian sturgeon oocyte extract (SOE) to porcine fetal fibroblasts (PFFs) was carried out. As results, the intensity of H3K9ac staining in PFFs following treatment of SOE for 7 h at 18°C was significantly increased but the intensity of H3K9me3 staining in PFFs was significantly decreased as compared with the control (p<0.05). Additionally, the level of histone acetylation in SCNT embryos at the zygote stage was significantly increased when reconstructed using SOE-treated cells (p<0.05), similar to that of IVF embryos at the zygote stage. The number of apoptotic cells was significantly decreased and pluripotency markers (Nanog, Oct4 and Sox2) were highly expressed in the blastocyst stage of SCNT embryos reconstructed using SOE-treated cells as nuclear donor (p<0.05). And there was observed a better development to the blastocyst stage in the SOE-treated group (p<0.05). Our results suggested that pre-treatment of cells with SOE could improve epigenetic reprogramming and the quality of porcine SCNT embryos.
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Affiliation(s)
- So-Young Kim
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Tae-Suk Kim
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Sang-Hoon Park
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Mi-Ran Lee
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Hye-Ju Eun
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Sang-Ki Baek
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Yeoung-Gyu Ko
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Sung-Woo Kim
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Hwan-Hoo Seong
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Keith H S Campbell
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
| | - Joon-Hee Lee
- Department of Animal Bioscience, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, Korea
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145
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Lee HM, Jeong YM, Park SH. Sparganosis of upper extremity in subcutaneous and intramuscular layers. Ultraschall Med 2014; 35:279-281. [PMID: 23860855 DOI: 10.1055/s-0033-1350134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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146
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Lee TH, Lee SJ, Moon JH, Park SH. Technical tips and issues of biliary stenting, focusing on malignant hilar obstruction. MINERVA GASTROENTERO 2014; 60:135-149. [PMID: 24780948] [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: 06/03/2023]
Abstract
In patients with inoperable hilar cholangiocarcinoma (HCCA), palliative endoscopic or percutaneous drainage provides benefits in terms of symptomatic improvement and quality of life. Endoscopic biliary stent placement is considered the gold standard, with metal stents preferred over plastic stents in patients with more than three months of life expectancy. However, the endoscopic management of advanced hilar obstruction is often more challenging and complex than distal malignant biliary obstructions. Recently, the Asia-Pacific working group on hepatobiliary cancers produced consensus recommendations on the use of endoscopic vs. percutaneous drainage and unilateral vs. bilateral drainage in the management of HCCA. However, these guidelines must be weighed against context-specific information, such as the volume of liver drainage required, life expectancy of the patient, and the available expertise. In this literature review, we describe the issues commonly encountered during endoscopic biliary stenting for malignant hilar obstruction and provide technical guidance to improve success rates and patient outcomes.
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Affiliation(s)
- T H Lee
- Division of Gastroenterology Department of Internal Medicine Soonchunhyang University School of Medicine Cheonan Hospital, Cheonan and Bucheon Hospital, Bucheon, Republic of Korea -
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147
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Ahn W, Song HS, Park SH, Kim KB, Shin KH, Lim SN, Yeon SH. Morphology-controlled graphene nanosheets as anode material for lithium-ion batteries. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.078] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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148
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Youn HC, Jegal JP, Park SH, Kim HK, Park HS, Roh KC, Kim KB. Phase transition method to form Group 6A nanoparticles on carbonaceous templates. ACS Nano 2014; 8:2279-2289. [PMID: 24499384 DOI: 10.1021/nn405633p] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Considerable effort has been made to develop unique methods of preparing and characterizing nanoparticles and nanocomposites in order to exploit the true potential of nanotechnology. We used a facile, versatile phase-transition method for forming Group 6A nanoparticles on carbonaceous templates to produce homogeneous 5-10 nm diameter Group 6A nanoparticles on carbon nanotubes (CNTs) and reduced graphene oxide (RGO), to obtain nanocomposites. The method involved melting and recrystallizing mixtures of elemental sulfur and either CNTs or RGO on carbonaceous templates. The surface tension and hydrophilicity of the molten Group 6A species surfaces and the oxygen functional groups on the carbonaceous template surfaces were considered in depth to provide important guidelines for forming Group 6A nanoparticles on carbonaceous templates. The surface tension of the molten Group 6A species should be intrinsically low, leading to effective wetting on the carbonaceous template. In addition, the molten Group 6A species hydrophilic surfaces were essential for enabling hydrophilic-hydrophilic interaction for selective wetting at the oxygen functional groups on the carbonaceous template, leading to the heterogeneous nucleation of nanoparticles. Furthermore, the size and morphology (isolated vs layer-like) of the Group 6A nanoparticles were tuned by adjusting the oxidation state of the carbonaceous template. We investigated the potential application of the nanocomposites prepared using this method to cathode materials in lithium-sulfur secondary batteries.
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Affiliation(s)
- Hee-Chang Youn
- Department of Materials Science and Engineering, Yonsei University , 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
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149
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Kim HJ, Park SH. Measurement of the Internal Adaptation of Resin Composites Using Micro-CT and Its Correlation With Polymerization Shrinkage. Oper Dent 2014; 39:E57-70. [DOI: 10.2341/12-378-l] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
In the present study, the internal adaptation of dentin-composite interfaces with various resin composite materials under conditions of thermomechanical loading was analyzed nondestructively using micro–computed tomography (micro-CT), and these results were compared with analyses of microgaps after sectioning. Additionally, the correlation of internal adaptation with polymerization shrinkage strain and stress was evaluated.
Four nonflowable resins, Gradia Direct (GD), Filtek P90 (P9), Filtek Z350 (Z3), and Charisma (CH), and two flowable resins, SDR (SD) and Tetric N-Flow (TF) were used. First, the polymerization shrinkage strain and stress were measured. Then, Class I cavities were prepared in 48 premolars. They were divided randomly into six groups, and the cavities were filled with composites using XP bond. To evaluate the internal adaptation, tooth specimens were immersed in a 25% silver nitrate solution, and micro-CT analysis was performed before and after thermomechanical loading. The silver nitrate penetration (%SP) was measured. After buccolingual sectioning and rhodamine penetration of the specimen, the rhodamine penetration (%RP) was measured using a stereo-microscope. One-way analysis of variance was then used to compare the polymerization shrinkage strain, stress, %SP, and %RP among the groups at a 95% confidence level. A paired t-test was used to compare the %SP before and after thermomechanical loading. Pearson correlation analysis was used to compare the correlation between polymerization shrinkage strain/stress and %SP or %RP to a 95% confidence level.
Evaluation of the polymerization shrinkage strain demonstrated that P9 < Z3 ≤ GD < CH ≤ SD < TF (p<0.05); similarly, evaluation of the polymerization shrinkage stress showed that P9 ≤ GD ≤ Z3 ≤ CH ≤ SD < TF (p<0.05). The %SP showed that P9 ≤ GD ≤ Z3 < CH ≤ SD < TF (p<0.05) before loading and that P9 ≤ GD ≤ Z3 ≤ CH ≤ SD < TF (p<0.05) after loading. There was a significant difference between the before-loading and after-loading measurements in all groups (p<0.05). Additionally, there was a positive correlation between the %SP and the %RP (r=0.810, p<0.001).
Conclusively, the polymerization shrinkage stress and strain were found to be closely related to the internal adaptation of the resin composite restorations. The newly proposed model for the evaluation of internal adaptation using micro-CT and silver nitrate may provide a new measurement for evaluating the internal adaptation of restorations in a nondestructive way.
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Affiliation(s)
- HJ Kim
- Hyun-Joo Kim, MS, Yonsei University, Conservative Dentistry, Oral Science Research Center, Seoul, Republic of Korea
| | - SH Park
- Sung-ho Park, PhD, Yonsei University, Conservative Dentistry, Oral Science Research Center, Seoul, Republic of Korea
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150
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Kim JH, Shin EH, Lee HY, Lee BG, Park SH, Moon DI, Goo GC, Kwon DY, Yang HJ, Kim OJ, Oh HG. Immunostimulating effects of extract of Acanthopanax sessiliflorus. Exp Anim 2014; 62:247-53. [PMID: 23903060 PMCID: PMC4160943 DOI: 10.1538/expanim.62.247] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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] [Indexed: 11/04/2022] Open
Abstract
As malfunction/absence of immune cells causes a variety of immunosuppressive disorders
and chemical synthetic drugs for curing these diseases have many adverse effects, vigorous
studies are being conducted. The Acanthopanax family has been used as
traditional medicines for gastric ulcer, diabetes, etc. and culinary materials in
East-South Asia. In this study, the immunostimulating properties of A.
sessiliflorus were evaluated. A. sessiliflorus increased not
only the splenocyte number but also immune-related cytokines such as TNF-α. However, it
could not upregulate the expressions of IFN-γ and IL-2. A. sessiliflorus
increased the swimming time, and comparison of organ weights relative to body weights for
immune-related organs such as the spleen and thymus after a forced swim test showed that
it could recover the spleen and thymus weights. It also increased the expression of TNF-α
and slightly increased the concentration of IFN-γ but not IL-2. From the results, we
concluded that as A. sessiliflorus has not only a host defense effect but
also a stress-ameliorating property, further study it will be a promising material of
immunostimulating material.
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Affiliation(s)
- Jung-Hoon Kim
- Huvet Co., Ltd., #203 Wonkwang University Business Incubator Center, 344-2 Shinyoung-dong, Iksan, Jeonbuk 570-749 Korea
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