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Wang JY, Xiao WH, Zhang LY, Zhang C, Wei J, Yang JJ, Zhou B, Zhao L, Zhang XL, Xu LY, Hong SD, Dong XS, Liu GL. [Application value of questionnaires in the screening obstructive sleep apnea syndrome in pregnancy across trimesters]. Zhonghua Yi Xue Za Zhi 2023; 103:3932-3937. [PMID: 38129170 DOI: 10.3760/cma.j.cn112137-20230726-00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Objective: To evaluate the clinical utility value of questionnaires of Berlin, STOP, STOP-Bang (SBQ), Epworth Sleepiness Scale (ESS) in screening obstructive sleep apnea syndrome (OSAS) in pregnant women of different trimesters. Methods: Consecutive pregnant women at high risk for OSAS were enrolled from January, 2021 to April, 2022 at the obstetric clinic of Peking University People's Hospital. They completed questionnaires of Berlin, STOP, SBQ, ESS and also underwent an overnight polysomnography (PSG). To evaluate the accuracy of questionnaires of Berlin, STOP, SBQ, ESS, sensitivity, specificity, positive predictive values, negative predictive values and the area under the receiver operating characteristics (ROC) curve of these questionnaires in pregnancy across trimesters (Pregnancy 1-15 weeks was the first stage, pregnancy 16-27 weeks was the second stage, and pregnancy 28-40 weeks was the third stage) were calculated. Results: A total of 100 pregnant women [(34.5±4.3) years old (26-46 years old)] were included in this study, including 20, 35 and 45 pregnant women in the first, second and third trimester of pregnancy, respectively. Based on PSG results, 45 (45%) of 100 pregnant women were diagnosed with OSAS. The overall predictive values of the four questionnaires were not good, area under[AUC(95%CI)] the ROC curve ESS, Berlin questionnaire STOP and SBQ were 0.54(0.43, 0.66), 0.59 (0.47, 0.70), 0.62(0.51, 0.73) and 0.61 (0.49, 0.72), respectively, sensitivity was 35.6%, 65.9%, 48.9%, 28.9%, specificity was 71.7%, 52.5%, 73.6%, 92.5%. When categorized according to trimesters, the predicted values of the four questionnaires increased in the first trimester, the AUC (95%CI) of STOP questionnaire was 0.81 (0.61, 1.00), sensitivity was 75.0%, specificity was 87.5%. Conclusion: The overall predictive power of the four screening questionnaires is limited in pregnant women. But predictive value of STOP questionnaire is acceptable in the first trimester.
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Affiliation(s)
- J Y Wang
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - W H Xiao
- Department of Respiratory Medicine and Intensive Care Unit, Binzhou Medical University Hospital, Binzhou 256603, China
| | - L Y Zhang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - C Zhang
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - J Wei
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J J Yang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - B Zhou
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - L Zhao
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - X L Zhang
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - L Y Xu
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - S D Hong
- National Institute of Health Data Science at Peking University, Beijing 100191, China
| | - X S Dong
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - G L Liu
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
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Bai R, Wang JY, Zhang C, Hong SD, Zhang LY, Wei J, Wang Y, Yang JJ, Dong XS, Han F, Liu GL. [Relationships between hypertensive disorders in pregnancy and obstructive sleep apnea syndrome]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:658-663. [PMID: 37724382 DOI: 10.3760/cma.j.cn112141-20230219-00074] [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: 09/20/2023]
Abstract
Objective: To investigate the impact of obstructive sleep apnea syndrome (OSAS) on pregnancy outcomes, especially the relationship between OSAS and hypertensive disorders in pregnancy (HDP). Methods: A total of 228 pregnant women with high risk of OSAS who underwent sleep monitoring during pregnancy in Peking University People's Hospital from January 2021 to April 2022 were collected by reviewing their medical records for retrospective analysis. According to the diagnosis of OSAS, the pregnant women were divided into OSAS group (105 cases) and non-OSAS group (123 cases). The non-parametric Mann-Whitney U test, χ2 test or Fisher's exact test were used to compare the general data and maternal and fetal outcomes between the two groups, and the occurrence of each type of HDP was further compared. Results: (1) Compared with the non-OSAS group, the median pre-pregnancy body mass index (23.6 vs 27.6 kg/m2) and the proportion of snoring [28.9% (33/114) vs 59.2% (61/103)] in the OSAS group were higher, and the differences were both statistically significant (both P<0.001). (2) The incidence of HDP [67.6% (71/105) vs 39.0% (48/123)] and gestational diabetes mellitus [GDM; 40.0% (42/105) vs 26.8% (33/123)] of pregnant women in the OSAS group were higher than those in the non-OSAS group, and the median delivery week was shorter than that in the non-OSAS group (38.4 vs 39.0 weeks). The differences were all statistically significant (all P<0.05). Between-group differences for the delivery way, postpartum hemorrhage, the rate of intensive care unit admission, preterm birth, small for gestational age infants, neonatal asphyxia, the rate of neonatal intensive care unit admission, newborn birth weight and the proportion of umbilical artery blood pH<7.00 were not statistically significant (all P>0.05). (3) Compared with the non-OSAS group, the incidence of chronic hypertension [11.4% (14/123) vs 22.9% (24/105)] and chronic hypertension with superimposed pre-eclampsia [11.4% (14/123) vs 30.5% (32/105)] were higher in the OSAS group, and the differences were both statistically significant (both P<0.01). Conclusion: OSAS is related to HDP (especially chronic hypertension and chronic hypertension with superimposed pre-eclampsia) and GDM, which could provide a practical basis for the screening, diagnosis and treatment of OSAS in pregnant women at high risk.
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Affiliation(s)
- R Bai
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J Y Wang
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - C Zhang
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - S D Hong
- National Institute of Health Data Science, Peking University, Beijing 100191, China
| | - L Y Zhang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J Wei
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - Y Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J J Yang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - X S Dong
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - F Han
- Division of Sleep Medicine, Peking University People's Hospital, Beijing 100044, China
| | - G L Liu
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
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Lee WJ, Kim YH, Hong SD, Rho TH, Kim YH, Dho YS, Hong CK, Kong DS. Development of 3-dimensional printed simulation surgical training models for endoscopic endonasal and transorbital surgery. Front Oncol 2022; 12:966051. [PMID: 35992880 PMCID: PMC9389537 DOI: 10.3389/fonc.2022.966051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundEndoscopic skull base surgery (ESBS) is complex, requiring methodical and unremitting surgical training. Herein, we describe the development and evaluation of a novel three-dimensional (3D) printed simulation model for ESBS. We further validate the efficacy of this model as educational support in neurosurgical training.MethodsA patient-specific 3D printed simulation model using living human imaging data was established and evaluated in a task-based hands-on dissection program. Endoscopic endonasal and transorbital procedures were simulated on the model by neurosurgeons and otorhinolaryngology surgeons of varying experience. All procedures were recorded using a high-definition camera coupled with digital video recorder system. The participants were asked to complete a post-procedure questionnaire to validate the efficacy of the model.ResultsFourteen experts and 22 trainees participated in simulations, and the 32 participants completed the post-procedure survey. The anatomical realism was scored as 4.0/5.0. The participants rated the model as helpful in hand-eye coordination training (4.7/5.0) and improving surgical skills (4.6/5.0) for ESBS. All participants believed that the model was useful as educational support for trainees (4.7 [ ± 0.5]). However, the color (3.6/5.0) and soft tissue feedback parameters (2.8/5) scored low.ConclusionThis study shows that high-resolution 3D printed skull base models for ESBS can be generated with high anatomical accuracy and acceptable haptic feedback. The simulation program of ESBS using this model may be supplemental or provide an alternative training platform to cadaveric dissection.
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Affiliation(s)
- Won-Jae Lee
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Yong Hwy Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University School of Medicine, Seoul, South Korea
| | - Sang-Duk Hong
- Department of Otorhinolaryngology—Head & Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Tae-Hoon Rho
- Department of Neurosurgery, Ajou University Hospital, Ajou University School of Medicine, Suwon, South Korea
| | - Young Hoon Kim
- Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Yun-Sik Dho
- Department of Neurosurgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Chang-Ki Hong
- Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Doo-Sik Kong
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
- *Correspondence: Doo-Sik Kong, /
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Kim JS, Hong SD. Risk factors for postoperative CSF leakage after endonasal endoscopic skull base surgery: a meta-analysis and systematic review. Rhinology 2021; 59:10-20. [PMID: 32785296 DOI: 10.4193/rhin20.145] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Cerebrospinal fluid (CSF) leakage is a complication that any surgeon working in the field of skull base surgery does not wish to encounter. The surgical approach to the skull base often varies, and the various sizes and locations of skull base lesions make it difficult to determine the cause of CSF leakage. However, it is useful to investigate which factors contribute to postopera- tive CSF leakage. METHODS Related studies were identified by searching the following databases: PubMed/Medline, Embase, and Web of Sciences through December 2019. Random-effects models were used to calculate odds ratios (ORs) and 95% confidence intervals (CIs). The Newcastle-Ottawa scale was used to evaluate the quality of observational studies. RESULTS Our search yielded 56 retrospective cohort studies involving a total of 11,826 skull base surgical procedures. The overall rate of postoperative CSF leakage was 7.2%. The effect of obesity on postoperative CSF leakage had an OR of 1.88, and the effect of perioperative radiotherapy on postoperative CSF leakage yielded an OR of 1.87. High intraoperative CSF flow rate also had a significant OR of 2.98. On the other hand, a pedicled vascularized flap efficiently reduced the risk of postoperative CSF leakage. Defect size and the presence or absence of a lumbar drain had no effect on postoperative CSF leakage. CONCLUSIONS This comprehensive quantitative assessment of postoperative CSF leakage showed that obesity, perioperative radiotherapy, and high intraoperative CSF flow rate raised the risk of CSF leakage; however, a pedicled vascularized flap can ef- fectively reduce the risk of postoperative CSF leakage.
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Affiliation(s)
- J S Kim
- Department of Medical Informatics, College of Medicine, Jeonbuk National University, Jeonju, Republic of Korea;Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Jeonbuk National University, Jeonju, Republic of Korea;Research Institute of Clinical Medicine of Jeonbuk National University â€" Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
| | - S D Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Seo MY, Nam DH, Kong DS, Lee SH, Noh Y, Jung YG, Kim HY, Chung SK, Lee KE, Hong SD. Extended approach or usage of nasoseptal flap is a risk factor for olfactory dysfunction after endoscopic anterior skullbase surgery: results from 928 patients in a single tertiary center. Rhinology 2020; 58:574-580. [PMID: 32662778 DOI: 10.4193/rhin20.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The aim of this study was to compare olfactory function change in patients who underwent endoscopic skull-base surgery. METHODOLOGY A total of 928 patients were included in this retrospective study. Olfactory function was measured using the non- validated Likert scale (0â€"100), the Cross-Cultural Smell Identification Test (CC-SIT) and the butanol threshold test (BTT). Patients were divided into two groups: an endoscopic trans-sellar approach group (ETA, n = 768) and an extended endoscopic endonasal approach group (EEEA, n = 160). The ETA group was sub-divided into Nasoseptal flap (NSF) and no NSF groups. RESULTS Non-validated olfactory function significantly worsened in the EEEA and ETA-NSF groups compared with that in the ETA- no NSF group for at least 6 months post-operatively. Validated olfactory impairment (BTT and CC-SIT) was also significantly worse in the EEEA and NSF groups compared with that in the ETA-no NSF group 3 months post-operatively. Additionally, the degrees of non-validated and validated olfactory deterioration were not significantly different between the EEEA and ETA-NSF groups. We also found that CC-SIT score changes were significantly impaired in tuberculum sellae meningioma patients than in craniopharyn- gioma patients. CONCLUSIONS We conclude that NSF was the key factor that led to olfactory impairment after endoscopic skull-base surgery.
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Affiliation(s)
- M Y Seo
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, South Korea; Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D-H Nam
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D-S Kong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S H Lee
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, South Korea
| | - Y Noh
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y G Jung
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Y Kim
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S-K Chung
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K E Lee
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S D Hong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Cho HJ, Hong SD, Kim HY, Chung SK, Dhong HJ. Clinical implications of serum galactomannan measurement in patients with acute invasive fungal rhinosinusitis. Rhinology 2017. [PMID: 27213721 DOI: 10.4193/rhin15.186] [Citation(s) in RCA: 9] [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] [Indexed: 11/08/2022]
Abstract
BACKGROUND Acute invasive fungal rhinosinusitis (AIFR) is an aggressive opportunistic infection with a high mortality rate. Recently, non-invasive techniques have been introduced for diagnosis of invasive fungal disease. The purpose of this study is to evaluate the diagnostic significance of serum galactomannan measurement in patients with AIFR. METHODOLOGY We conducted a retrospective case-control study of 28 patients with AIFR and 36 fungus ball (FB) patients. We evaluated clinical, laboratory, and pathologic findings along with disease course. RESULTS In 28 patients with AIFR, there were 21 cases of invasive aspergillosis (IA) and 7 cases of invasive mucormycosis (IM). The control group was comprised of 36 patients with FB. The three-group analysis showed a statistically significant difference among the groups. At the cut-off value of 0.48, the sensitivity and specificity were 71.4% and 93.0%, respectively. Comparison of mean serum galactomannan levels in 5 non-survivors and 9 survivors at initial measurement showed no significant difference, but that became significantly different 1 week later. Statistical analysis showed that the levels of serum galactomannan decreased significantly according to the measurement-point in within survivor-group analysis. The difference in between survivor-groups analysis was also significant. CONCLUSION Serum galactomannan measurement seems useful for early diagnosis and discrimination of fungal species in patients with AIFR. In addition, clinical outcomes may be related to the levels and patterns of serum galactomannan, especially in IA. The appropriate measurement of galactomannan might be helpful in treating the patients at high risk for AIFR.
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Affiliation(s)
- H J Cho
- Department of Otorhinolaryngology, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - S D Hong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H Y Kim
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S K Chung
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H J Dhong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Cho HJ, Hong SD, Kim HY, Chung SK, Dhong HJ. Clinical implications of serum galactomannan measurement in patients with acute invasive fungal rhinosinusitis. Rhinology 2016; 54:336-341. [PMID: 27213721 DOI: 10.4193/rhino15.186] [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: 11/08/2022]
Abstract
BACKGROUND Acute invasive fungal rhinosinusitis (AIFR) is an aggressive opportunistic infection with a high mortality rate. Recently, non-invasive techniques have been introduced for diagnosis of invasive fungal disease. The purpose of this study is to evaluate the diagnostic significance of serum galactomannan measurement in patients with AIFR. METHODOLOGY We conducted a retrospective case-control study of 28 patients with AIFR and 36 fungus ball (FB) patients. We evaluated clinical, laboratory, and pathologic findings along with disease course. RESULTS In 28 patients with AIFR, there were 21 cases of invasive aspergillosis (IA) and 7 cases of invasive mucormycosis (IM). The control group was comprised of 36 patients with FB. The three-group analysis showed a statistically significant difference among the groups. At the cut-off value of 0.48, the sensitivity and specificity were 71.4% and 93.0%, respectively. Comparison of mean serum galactomannan levels in 5 non-survivors and 9 survivors at initial measurement showed no significant difference, but that became significantly different 1 week later. Statistical analysis showed that the levels of serum galactomannan decreased significantly according to the measurement-point in within survivor-group analysis. The difference in between survivor-groups analysis was also significant. CONCLUSION Serum galactomannan measurement seems useful for early diagnosis and discrimination of fungal species in patients with AIFR. In addition, clinical outcomes may be related to the levels and patterns of serum galactomannan, especially in IA. The appropriate measurement of galactomannan might be helpful in treating the patients at high risk for AIFR.
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Affiliation(s)
- H J Cho
- Department of Otorhinolaryngology, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - S D Hong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H Y Kim
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S K Chung
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H J Dhong
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Ouyang X, Hong SD, Xin F, Wang L, Yang XW, Wang JR, Wang Q, Cui WD, Zhang AJ, Zhao ZX. The curative efficacy of arthroscopic therapy in treating anterior cruciate ligament rupture with secondary osteoarthritis. Eur Rev Med Pharmacol Sci 2016; 20:214-219. [PMID: 26875887] [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 To compare and analyze the clinical effects of arthroscopic therapy and drug therapy in treating anterior cruciate ligament (ACL) rupture with secondary osteoarthritis (OA). PATIENTS AND METHODS A total of 68 patients that were diagnosed as ACL rupture with secondary OA in our hospital from February 2014 to February 2015 were enrolled in our study. All of the patients were randomly divided into control group (n = 30) and observation group (n = 38) according to the order of admission. The patients in the control group were given analgesic, anti-inflammatory drugs + functional rehabilitation training whereas the patients in the observation group were given ACL reconstruction + OA debridement and functional rehabilitation training under arthroscopy. RESULTS The success rate of the observation group was 92.1%. After 3-month follow-up, the clinical total effective rate of the observation group was significantly higher than that of the control group, the prevalence of complications in the observation group was significantly lower than in the control group, and differences were statistically significant (p < 0.05). Lysholm scale scoring of observation group was significantly higher than of the control group, modified McGill pain scale score was significantly lower than that of the control group, and differences were statistically significant (p < 0.05). Quadriceps muscle peak torque, average power, and the optimal single work at 60°/s, 120°/s, and 180°/s were significantly higher than those of the control group, and differences were statistically significant (p < 0.05). CONCLUSIONS Arthroscopic operative therapy was safe and effective for the treatment of ACL with secondary OA. Compared with drug therapy, it can significantly improve the movement function of the knee joint, so it was worthy of clinical application.
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Affiliation(s)
- X Ouyang
- Department of Orthopedics, Xuzhou Third Hospital, Affiliated Hospital of Jiangsu University, Xuzhou, China.
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Sohn JH, Hong SD, Kim JH, Dhong HJ, Chung SK, Kim HY, Oh SY. Extraocular muscle injury during endoscopic sinus surgery: a series of 10 cases at a single center. Rhinology 2014; 52:238-45. [PMID: 25271529 DOI: 10.4193/rhino13.131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Extraocular muscle (EOM) injury is a rare but serious complication of endoscopic sinus surgery (ESS). The aim of this study is to describe the clinical characteristics and course of EOM injury occurring during ESS. DESIGN Retrospective case series. METHODS Medical records and CT images of patients who suffered from EOM injury after ESS between 2006 and 2012 were retrospectively reviewed. Patient demographics, endoscopic anatomy, type of surgery (primary or revision), predisposing risk factors, site and extent of injury on CT imaging, and associated complications were evaluated. In addition, data regarding ophthalmologic management and clinical outcomes were collected. RESULTS Ten patients with EOM injuries after ESS were included in this study. One patient was undergoing revision ESS. All patients sustained medial rectus muscle injury and one patient suffered concurrent ipsilateral inferior rectus muscle injury. A microdebrider was used in nine cases. Right-sided injury (90% of patients) was more prevalent than left-sided injury, and 70% of injured medial rectus muscles were completely transected. After subsequent strabismus surgery, 8/9 patients regained binocular single vision in primary gaze despite residual diplopia in some gaze positions. CONCLUSION Although proper ophthalmologic surgery after EOM injury may improve deviation in the primary gaze position, none of the patients regained normal EOM movement. Therefore, prevention of this complication through adequate surgical technique and precautions is important.
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Abstract
We recently demonstrated that pain-sensing neurons in the trigeminal system can be selectively anesthetized by co-application of QX-314 with the TRPV1 receptor agonist, capsaicin (QX cocktail). Here we examined whether this new anesthetic strategy can block the neuronal changes in the brainstem following molar tooth extraction in the rat. Adult male Sprague-Dawley rats received infiltration injection of anesthetic 10 min prior to lower molar tooth extraction. Neuronal activation was determined by immunohistochemistry for the proto-oncogene protein c-Fos in transverse sections of the trigeminal subnucleus caudalis (Sp5C). After tooth extraction, c-Fos-like immunoreactivity (Fos-LI) detected in the dorsomedial region of bilateral Sp5C was highest at 2 hrs (p < .01 vs. naïve ipsilateral) and declined to pre-injury levels by 8 hrs. Pre-administration of the QX cocktail significantly reduced to sham levels Fos-LI examined 2 hrs after tooth extraction; reduced Fos-LI was also observed with the conventional local anesthetic lidocaine. Pulpal anesthesia by infiltration injection was confirmed by inhibition of the jaw-opening reflex in response to electrical tooth pulp stimulation. Our results suggest that the QX cocktail anesthetic is effective in reducing neuronal activation following tooth extraction. Thus, a selective pain fiber 'nociceptive anesthetic' strategy may provide an effective local anesthetic option for dental patients in the clinic.
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Affiliation(s)
- B Badral
- Pain Cognitive Function Research Center, Dental Research Institute and Department of Neurobiology & Physiology
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Abstract
BACKGROUND The purpose of this study was to analyse audiological data after microvascular decompression (MVD) for hemifacial spasm (HFS), and to compare the data with hearing before surgery. METHODS Auditory functions were studied before and after surgery in 698 patients who underwent an MVD of the intracranial portion of the facial nerve for HFS. The results were expressed as the average of pure tone audiometry (PTA) and speech discrimination score (SDS). RESULTS 668 patients (95.7%) had no hearing loss immediately after surgery (group 1). 17 patients (2.4%) had a postoperative decrease in PTA exceeding 15 dB and a decrease in SDS which was proportional to the postoperative PTA thresholds (group 2). Eight patients (1.2%) had poor SDS that appeared to be out of proportion to the degree of hearing loss depicted by the postoperative PTA thresholds, suggesting retrocochlear or cochlear nerve pathology (group 3). Five patients (0.7%) had total deafness after surgery (group 4). In group 2, 12 patients (70.6%) returned to their preoperative hearing capacity. However, among the eight patients in group 3 and five in group 4, only two (25%) and none (0%) have returned to their preoperative hearing status, respectively. CONCLUSION In this large study, permanent hearing loss occurred in 16 patients (2.2%). Patients with a mild hearing loss with a good SDS (cochlear type) demonstrated much better prognosis than those with poor SDS (retrocochlear type) or total deafness. In addition, total deafness after surgery had no chance of recovery to preoperative hearing capacity.
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Affiliation(s)
- K Park
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Gangnam-Gu, Seoul, Korea
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Min JY, Hong SD, Kim K, Son YI. Long-term results of Artecoll injection laryngoplasty for patients with unilateral vocal fold motion impairment: safety and clinical efficacy. ACTA ACUST UNITED AC 2008; 134:490-6. [PMID: 18490569 DOI: 10.1001/archotol.134.5.490] [Citation(s) in RCA: 21] [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] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To determine the long-term clinical efficacy and safety of injections of Artecoll, a soft-tissue filler consisting of a suspension of polymethyl methacrylate microspheres in a 3.5% solution of bovine collagen, into a vocal fold for managing glottal insufficiency secondary to unilateral vocal fold motion impairment. DESIGN Single-institution retrospective study. SETTING A single tertiary care teaching hospital of Sungkyunkwan University School of Medicine. PATIENTS Ninety-six patients with unilateral vocal fold motion impairment. INTERVENTIONS Percutaneous Artecoll injection laryngoplasty under local anesthesia. MAIN OUTCOME MEASURES Acoustic, aerodynamic, and stroboscopic analyses were performed before injection and 1 week and 3, 6, and 12 months after injection. Two speech-language pathologists performed the perceptual assessment, and we used the subjective rating of hoarseness by the patients. RESULTS The maximal phonation time, shimmer (amplitude variation), jitter (frequency variation), and ratio of noise to harmonic showed significant improvement 3 months after injection; these improvements were maintained 12 months after injection (P < .05). The GRBAS scale (overall grade of hoarseness, roughness, breathiness, asthenicity, and strain) grades and subjective patient-rated scores of hoarseness improved from 1 week after injection, and the improvements were maintained 12 months after injection (P < .05). We observed no significant early or delayed adverse events. CONCLUSION Injection laryngoplasty with Artecoll is a safe, useful, and durable treatment option for the management of glottal insufficiency secondary to unilateral vocal fold motion impairment.
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Affiliation(s)
- Jin-Young Min
- Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-Dong, Gangnam-Gu, Seoul, Korea
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Cho YS, Hong SD, Park SH, Chung KW, Chung WH. P110: Chronic Otitis Media and IgE-Mediated Hypersenstivity. Otolaryngol Head Neck Surg 2007. [DOI: 10.1016/j.otohns.2007.06.623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kim SK, Heo SJ, Koak JY, Lee JH, Lee YM, Chung DJ, Lee JI, Hong SD. A biocompatibility study of a reinforced acrylic-based hybrid denture composite resin with polyhedraloligosilsesquioxane. J Oral Rehabil 2007; 34:389-95. [PMID: 17441880 DOI: 10.1111/j.1365-2842.2006.01671.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Acrylic-based denture materials have several common weak points, such as shrinkage after curing, lack of strength and toxicity. In order to solve these problems, we adapted a hybrid system using acrylic polymer and polyhedraloligosilsesquioxane (POSS). The aim of the study was to investigate the biocompatibility of a reinforced acrylic-based hybrid denture composite resin with POSS. Specimens of a novel polymeric denture base resin, in which POSS was used to partially replace the commonly used base monomer, were fabricated. In order to examine changes in biocompatibility with time, fresh specimens, along with specimens soaked in distilled water for 24 and 72 h were fabricated. Three other types of acrylic denture base resins were used to prepare the resin specimens. Biocompatibility (as measured by a metabolic assay, an agar overlay test, and a mutagenesis assay) of the composites was tested. The metabolic and mutagenesis assays were conducted with pure culture medium as a control. In this study, the reinforced acrylic-based hybrid denture composite resin with POSS showed improved biocompatibility and lower mutagenicity than the control. Statistical examinations showed the cell metabolic activity of the novel polymeric denture base resin in the 72-h immersion case as having almost the same inclination as the control. We hope that these results might aid in the development of a reinforced acrylic-based denture resin.
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Affiliation(s)
- S K Kim
- Department of Prosthodontics and Dental Research Institute, College of Dentistry, Seoul National University, Seoul, Korea
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Cho YS, Lee DK, Hong SD, Oh WS. Intracranial aspergillosis involving the internal auditory canal and inner ear in an immunocompetent patient. AJNR Am J Neuroradiol 2007; 28:138-40. [PMID: 17213442 PMCID: PMC8134082] [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: 05/13/2023]
Abstract
We report the MR imaging findings in a case of intracranial aspergillosis involving the internal auditory canal (IAC) and inner ear in an immunocompetent patient. The presence of rim enhancement of the vestibulocochlear nerve, abnormal signal intensity involving the labyrinth, and adjacent meningeal enhancement might help clinicians to make a correct diagnosis in patients with a mass in the IAC and previous history of ear surgery.
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Affiliation(s)
- Y-S Cho
- Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
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Affiliation(s)
- S D Hong
- University of California, San Francisco, School of Medicine, USA
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Myoung H, Hong SP, Hong SD, Lee JI, Lim CY, Choung PH, Lee JH, Choi JY, Seo BM, Kim MJ. Odontogenic keratocyst: Review of 256 cases for recurrence and clinicopathologic parameters. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001; 91:328-33. [PMID: 11250631 DOI: 10.1067/moe.2001.113109] [Citation(s) in RCA: 202] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Odontogenic keratocyst (OKC) is of particular interest because of its high recurrence rate and aggressive behavior. Two hundred fifty-six cases of OKC were reviewed for the age of the patient at diagnosis, sex of the patient, OKC location, and radiographic findings, and 132 patients with OKC were observed to estimate recurrence, which was analyzed for age, sex, location, and several histopathologic findings. OKCs occurred more frequently in men (58.6%) than in women (41.4%), and they occurred in patients within a wide age range, most commonly in patients in the third decade of life (28.9%), followed by those in the second decade (25.0%); the mean age of patients with OKC was 30.8 years. One hundred ninety-six of the 256 cases (76.5%) occurred in the mandible, and the other 60 cases (23.5%) occurred in the maxilla. The mandibular molar and the premolar areas (51.2%) were the most common sites, and the most frequent clinical manifestations at first admission were swelling, pain, or both (82.4% of total cases). Radiographic impressions included dentigerous cyst (27.3%), OKC (25.4%), primordial cyst (14.8%), ameloblastoma (11.7%), residual cyst (9.8%), and radicular cyst (3.1%). The frequency of recurrence at the follow-up examination was 58.3%. There was no significant difference in the recurrence rate on the basis of the sex of the patient. However, OKCs had a significantly higher recurrence rate in patients in the fifth decade of life than in patients in the other age groups (P = .005).Recurrence rates were significantly dependent on the sites of involvement, and OKCs in the mandibular molar region had significantly higher recurrence rates than those in other sites (P = .001). The histopathologic presence of one or more daughter cysts was significantly related to recurrence (P = .03).
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Affiliation(s)
- H Myoung
- Department of Oral Pathology, College of Dentistry and Dental Research, Seoul National University, Korea
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18
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Myoung H, Hong SD, Kim YY, Hong SP, Kim MJ. Evaluation of the anti-tumor and anti-angiogenic effect of paclitaxel and thalidomide on the xenotransplanted oral squamous cell carcinoma. Cancer Lett 2001; 163:191-200. [PMID: 11165754 DOI: 10.1016/s0304-3835(00)00701-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 02/07/2023]
Abstract
Angiogenesis is an essential process for the growth and invasion of cancer. However, it is uncertain that anti-angiogenic effects can be a major treatment strategy of oral cancer. The aim of this study was to investigate whether thalidomide and paclitaxel, which are known to be potent inhibitors of angiogenesis, have inhibitory effects on the growth of oral squamous cell carcinoma (OSCC) xenotransplanted into nude mice and whether anti-angiogenesis can be included as a major treatment strategy of oral cancer. After human OSCC cell line, KB, was subcutaneously inoculated into 32 nude mice, the volume of tumor was measured every 3 days. When the tumor mass reached 300-500 mm3, thalidomide (200 mg/kg) and paclitaxel (13 mg/kg) were administered into the animals and tumor volume change was checked. The excised tumor masses on the 30th day after administration were frozen and processed for immunohistochemistry using vascular endothelial growth factor (VEGF) and CD31, and for real-time reverse transcription-polymerase chain reaction (RT-PCR). We evaluated VEGF expression and the expression of its mRNA and CD31 for vessel density. Paclitaxel showed an inhibitory effect on the growth of transplanted human OSCC and reduced the immunohistochemical expression of VEGF and CD31 and VEGF mRNA (P<0.01). Thalidomide also lowered remarkably VEGF expression (P<0.01) and CD31 (P<0.01) as well as VEGF mRNA (P<0.05), but it did not show statistically significant inhibitory effect on the tumor growth. These results suggest that the growth of human OSCC is not simply dependent on VEGF-induced angiogenesis and that anti-angiogenic therapy alone is not likely to be effective for the treatment of OSCC, but might be regarded as adjuvant chemotherapeutic strategy.
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MESH Headings
- Angiogenesis Inhibitors/therapeutic use
- Animals
- Antineoplastic Agents, Phytogenic/therapeutic use
- Carcinoma, Squamous Cell/blood supply
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/prevention & control
- Drug Screening Assays, Antitumor
- Drug Therapy, Combination
- Endothelial Growth Factors/metabolism
- Female
- Humans
- Lymphokines/metabolism
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Mouth Neoplasms/blood supply
- Mouth Neoplasms/metabolism
- Mouth Neoplasms/prevention & control
- Neoplasm Transplantation
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/prevention & control
- Paclitaxel/therapeutic use
- RNA, Messenger/metabolism
- Thalidomide/therapeutic use
- Transplantation, Heterologous
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factors
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Affiliation(s)
- H Myoung
- Department of Oral and Maxillofacial Surgery, College of Dentistry and Dental Research Institute, Seoul National University, 28-2, Yun-Gun dong, Chong-No gu, Seoul, South Korea
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Park DS, Shin SW, Hong SD, Park HY. Immunological detection of serpin in the fall webworm, Hyphantria cunea and its inhibitory activity on the prophenoloxidase system. Mol Cells 2000; 10:186-92. [PMID: 10850660 DOI: 10.1007/s10059-000-0186-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
We previously identified a serine type protease inhibitor (serpin) cDNA, using PCR-based differential display, in the fall webworm which was up-regulated following a bacterial challenge (Shin et al., 1998). The serpin cDNA was inserted into an expression vector and the serpin protein was expressed in Escherichia coli. In order to investigate the action of serpin in vivo, we examined the concentration of serpin protein in the larvae of Hyphantria cunea by Western blot analysis using a polyclonal antibody raised in a rabbit injected with recombinant serpin. H. cunea serpin was found mainly in the plasma with a molecular mass of 56.6 kDa on SDS-PAGE followed by Western blot analysis. The concentration of serpin in the plasma was slightly increased following bacterial challenge. A new 50.5 kDa (approx.) band was detected post E. coli and distilled water injection. Both E. coli and distilled water injection induced increased phenoloxidase (PO) activity in the plasma, although E. coli injection produced a larger increase in activity. Hyphantria serpin probably participates in negative regulation of the prophenoloxidase (proPO) cascade. Recombinant serpin inhibits PO activity in the hemocyte lysate fraction activated by LPS. There is a similarity between the P2-P2' region (NKFG) of the serpin reactive site loop and the S2-S2' region (NRFG) of the insect proPO maturation site. This indicates a form of competitive inhibition of serpin against a protease involved in the activation of proPO. A tyrosine residue in the P11 region of serpin, which is conserved in the S11 regions of all known proPOs maturation sites, provides further support for this hypothesis.
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Affiliation(s)
- D S Park
- Insect Resources Lab., Korea Research Institute of Bioscience and Biotechnology, Taejon
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Abstract
In order to evaluate the significance of matrix metalloproteinases (MMPs) in predicting the metastatic potential of oral squamous cell carcinomas (SCCs), we compared MMP-2 and -9 expression in 19 metastasizing oral SCCs with that in 25 non-metastasizing cases by immunohistochemistry and gelatin zymography. Immunohistochemistry showed that increased MMP-2 expression was not significantly related to metastasis; increased MMP-9 expression found in oral SCCs was, however, statistically significant (oral SCCs with metastasis, 73.7%; those without metastasis, 36.0%; P<0.05). Gelatin zymography revealed no significant difference in the activated form of MMP-2 between metastasizing and non-metastasizing oral SCCs. In metastasizing SCCs, on the other hand, increases in the activated form of MMP-9 were significant. These results suggest that oral SCCs express MMP-2 and -9, and that MMP-9 may play a more important role than MMP-2 in the metastasis of oral SCCs to adjacent tissue. An analysis of MMP-9 expression may be useful for predicting the metastatic potential of oral SCCs.
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Affiliation(s)
- S D Hong
- Department of Oral Pathology, College of Dentistry and Dental Research Institute, Seoul National University, 28-2 Yeonkeun-dong, Chongro-gu, Seoul, South Korea
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Lee DS, Lee SH, Noh JG, Hong SD. Antibacterial activities of cryptotanshinone and dihydrotanshinone I from a medicinal herb, Salvia miltiorrhiza Bunge. Biosci Biotechnol Biochem 1999; 63:2236-9. [PMID: 10664860 DOI: 10.1271/bbb.63.2236] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cryptotanshinone and dihydrotanshinone I, constituents of a medicinal plant, Salvia miltiorrhiza Bunge, had antibacterial activity against a broad range of Gram positive bacteria. These compounds generated superoxide radicals in Bacillus subtilis lysates. A recombination-deficient mutant strain of B. subtilis was 2- to 8-fold more sensitive than a wild strain, and this hypersensitivity was reduced in the presence of dithiothreitol as an antioxidant. DNA, RNA, and protein syntheses in B. subtilis were non-selectively inhibited by these compounds. These results suggest that superoxide radicals are important in the antibacterial actions of the agents.
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Affiliation(s)
- D S Lee
- Department of Microbiology, College of Natural Science, Kyungpook National University, Taegu, Korea.
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Abstract
This study was conducted to assess the psychosocial adjustment of Korean-American physicians in the aspect of personal satisfaction after returning to Korea. A questionnaire was mailed to 72 Korean-American physicians who were practicing medicine in Korea and forty physicians responded. These physicians, typically in their 50s, lived in America for 21-30 years before coming back to Korea. The most frequent motives for them to come back to Korea were giving back to their native country, longing for their native country, filial duty, and suggestions from their colleagues or professors to move back. Eighty percent of them were extremely satisfied or slightly satisfied with their work in Korea, and only 10% are extremely or slightly dissatisfied with their decision to return. Although most of them are content for the time being in Korea, only 12.5% have definite plans to stay in Korea after retirement. The variables that were most significantly related to personal satisfaction of returning to Korea were how well treated at work and how much satisfied with job rather than other factors such as motives for returning, duration of staying in America and in Korea, and family situation.
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Affiliation(s)
- S D Hong
- Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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Kim SA, Woo JH, Hong SD, Song BH. Isolation of the Bacillus subtilis cdd downstream region and analysis of genetic structure around the cdd vicinity. Mol Cells 1997; 7:648-54. [PMID: 9387153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A 310 bp EcoRI/HindIII fragment downstream of the Bacillus subtilis cdd gene was isolated from pSO52 which harbours the cdd gene and its vicinity, and was inserted into the pDIA5304. The hybrid vector pSO701 was integrated into the targeted locus of the B. subtilis chromosome and the cdd downstream region was rescued by furthermost BamHI walking toward the sigA locus. By sequencing and analyzing the intergenic region between the cdd and p23-dnaG-sigA operon from the selected clone pSO702, the era genes encoding glycyl tRNA synthetase alpha and beta chains with two unknown distal genes at both terminals were identified and mapped. The cdd was separated by 6,964 bp from the p23-dnaG-sigA operon. Combined data with an additional analysis of the cdd upstream from the sequenced 280 kb stretch in GenBank database (accession No. D84432) indicates that the revised gene order like hrcA-grpE-dnaK-dnaJ-phoH-dgk-cdd-era-tRNA( gly) synthetase alpha and beta-p23-dnaG-sigA-cccA with unidentified distal genes was established genetically on a counter clockwise orientation at 225 degrees of the linkage map.
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Affiliation(s)
- S A Kim
- Department of Biology Education, Kyungpook University, Taegu, Korea
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Chae Q, Park HJ, Hong SD. Loading of quin2 into the oat protoplast and measurement of cytosolic calcium ion concentration changes by phytochrome action. Biochim Biophys Acta 1990; 1051:115-22. [PMID: 2310765 DOI: 10.1016/0167-4889(90)90182-d] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The loading of quin2 into oat protoplasts was carried out in an incubation medium (0.6 M sorbitol, 1 mM CaCl2, 5 mM Mes, 5 mM Tris, 0.05% BSA, 1 mM KCl, 1 mM MgSO4 (pH 6.8)), in which we found the best viability of the protoplast and the highest membrane permeability of quin2/AM, compared with the results obtained from any other incubation medium we had tried to use. 50 microns of quin2/AM was added in the suspension medium containing 5 x 10(5)/ml of oat protoplasts, and incubation at 4 degrees C was performed for 24 h. From atomic absorption data, we confirmed that quin2 loading was 1.78 mmol per liter of cells. Red-light (660 nm) irradiation for 5 min caused an increase of the cytosolic Ca2+ concentration from 30 to 193 nM. On the other hand, a subsequent irradiation with far-red light (730 nm) for 5 min decreased it by about 48 nM. Even when the extracellular Ca2+ was completely chelated with 1 mM EDTA, red light increased the cytosolic Ca2+ concentration by about 51 nM and far-red light decreased it to 3 nM. These results imply that the Pfr form of phytochrome functions not only in the process of influx of Ca2+, but also in the mobilization process of Ca2+ from the intracellular Ca2+ pools. The fact that the Pr form of phytochrome lowers the cytosolic Ca2+ concentration is also presented in this report.
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Affiliation(s)
- Q Chae
- Department of Biochemistry, Chungbuk National University, Cheongju, Korea
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Cho KS, Hong SD, Cho JM, Chang CS, Lee KS. Studies on the biosynthesis of acylphosphatidylglycerol in Escherichia coli B and B/r. Biochim Biophys Acta 1976; 486:47-54. [PMID: 12836 DOI: 10.1016/0005-2760(77)90068-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The present study has demonstrated that one molecule of acylphosphatidylglycerol was synthesized from two molecules of phosphatidylgycerol by the transacylation reaction in which phosphatidylglycerol acted both as an acyl donor and an acceptor. Phosphatidylethanolamine was identified as an another acyl donor, participating in acylphosphatidylglycerol formation. These results are discussed in terms of a new pathway for the turnover of phosphatidylglycerol in Escherichia coli.
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Hong SD. [Results of conservative treatment of congenital dislocation of the hip. Statistical analysis of roentgenograms]. Nihon Seikeigeka Gakkai Zasshi 1969; 43:1-13. [PMID: 5816658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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