1.A cases of velamentous insertion of umbilical cord.
Ho Sang SEO ; Sam Hyeon CHO ; Soo Hyeon JO ; Kyeong Tae KIM ; Yoon Yeong HWANG ; Jai Euk LEE
Korean Journal of Obstetrics and Gynecology 1993;36(12):3970-3975
No abstract available.
Umbilical Cord*
2.A clinical study of endometriosis.
Seon Je HWANG ; Yong Ho RHO ; Wook Hyeon KWON ; Hee Dong YANG ; Jeong Sang GWAK
Korean Journal of Obstetrics and Gynecology 1993;36(7):3028-3033
No abstract available.
Endometriosis*
;
Female
3.The clinical studies on acute poisoning of infants and children visited the emergency room in rural area.
Chang Hi LEE ; Gyu Dong CHOI ; Hyeon Soo HAN ; Hye Heon HWANG ; Myung Ho CHO
Journal of the Korean Academy of Family Medicine 1991;12(2):40-46
No abstract available.
Child*
;
Emergencies*
;
Emergency Service, Hospital*
;
Humans
;
Infant*
;
Poisoning*
4.Mode of tooth movement according to the timing of orthodontic force application after extraction.
Sung Ho HAN ; Hyeon Shik HWANG
Korean Journal of Orthodontics 2000;30(1):9-17
This study was performed to compare and analyzed the mode of tooth movement according to the timing of orthodontic force application after extraction. The upper right and left third incisors were carefully extracted at three-week interval in four adult dogs. Both canines were used as an anchorage for the bodily movement of the upper second incisors. Orthodontic force of 100gm was simultaneously applied at one week after extraction on one side four weeks after extraction on the other side using NiTi closed coil spring. While orthodontic force was applied for twelve weeks, the amount of tooth movement was measured at every second week with calipers. The animals were sacrificed at twelve weeks and histologic examination was executed to reveal any difference between both sides. The results were obtained as follows: 1. The tooth movement was likely to be faster in four-week side for the first two seeks while faster in one-week side during next two weeks 2. The rate of tooth movement was fastest during four to six weeks period, then decreased gradually. 3. The total amount of tooth movement was likely to be larger in one-week side compared to four-week side. 4 Any damage to tooth and periodontal tissue could not be seen in the histologic section of one-week side. These results suggest that earlier application of orthodontic force is better than later after extraction in terms of the rate of tooth movement.
Adult
;
Animals
;
Dogs
;
Humans
;
Incisor
;
Tooth Movement*
;
Tooth*
5.Clinical Implication of Maumgyeol Basic Service–the 2 Channel Electroencephalography and a Photoplethysmogram–based Mental Health Evaluation Software
Seung-Hwan LEE ; Hyeon-Ho HWANG ; Sungkean KIM ; Junseok HWANG ; Jaehyun PARK ; Sangshin PARK
Clinical Psychopharmacology and Neuroscience 2023;21(3):583-593
Objective:
Maumgyeol Basic service is a mental health evaluation and grade scoring software using the 2 channels EEG and photoplethysmogram (PPG). This service is supposed to assess potential at-risk groups with mental illness more easily, rapidly, and reliably. This study aimed to evaluate the clinical implication of the Maumgyeol Basic service.
Methods:
One hundred one healthy controls and 103 patients with a psychiatric disorder were recruited. Psychological evaluation (Mental Health Screening for Depressive Disorders [MHS-D], Mental Health Screening for Anxiety Disorders [MHS-A], cognitive stress response scale [CSRS], 12-item General Health Questionnaire [GHQ-12], Clinical Global Impression [CGI]) and digit symbol substitution test (DSST) were applied to all participants. Maumgyeol brain health score and Maumgyeol mind health score were calculated from 2 channel frontal EEG and PPG, respectively.
Results:
Participants were divided into three groups: Maumgyeol Risky, Maumgyeol Good, and Maumgyeol Usual. The Maumgyeol mind health scores, but not brain health scores, were significantly lower in the patients group compared to healthy controls. Maumgyeol Risky group showed significantly lower psychological and cognitive ability evaluation scores than Maumgyeol Usual and Good groups. Maumgyel brain health score showed significant correlations with CSRS and DSST. Maumgyeol mind health score showed significant correlations with CGI and DSST. About 20.6% of individuals were classified as the No Insight group, who had mental health problems but were unaware of their illnesses.
Conclusion
This study suggests that the Maumgyeol Basic service can provide important clinical information about mental health and be used as a meaningful digital mental healthcare monitoring solution to prevent symptom aggravation.
6.Various 12-Lead Electrocardiographic Findings of Diffuse Three Vessel Coronary Artery Spasm.
Kwang Kon KOH ; In Ho CHAE ; Gi Hoon HAN ; Sang Hoon LEE ; Heung Kon HWANG ; Pan Gum KIM ; Yeon Hyeon CHOE
Korean Circulation Journal 1991;21(4):715-726
No abstract available.
Coronary Vessels*
;
Electrocardiography*
;
Spasm*
7.Glia-Like Cells from Human Mesenchymal Stem Cells Protect Neural Stem Cells in an In Vitro Model of Alzheimer's Disease by Reducing NLRP-3 Inflammasome
Mina HWANG ; Se hyeon SONG ; Mi-Sook CHANG ; Seong-Ho KOH
Dementia and Neurocognitive Disorders 2021;20(1):1-8
Background:
and Purpose: Neural stem cells (NSCs) have the ability to regenerate, proliferate, and differentiate, enabling them to play important roles in the recovery of the damaged nervous system. However, in neurodegenerative diseases such as Alzheimer's disease (AD), the NSCs are damaged as well. Glia-like cells from human mesenchymal stem cells (ghMSCs) are functionally enhanced adult stem cells. In the present study, we investigated whether ghMSCs could protect NSCs from amyloid beta (Aβ)-mediated toxicity.
Methods:
Rat NSCs were obtained from E13–14 fetal rat cortices. NSCs were seeded in pre-coated plates, and the next day, cells were simultaneously treated with 20 μM Aβ and 0.4 μm pore insert well-seeded ghMSCs. After 48 hours of co-treatment, cell viability and proliferation were evaluated. After 2 hours of co-treatment, western blotting was performed to measure inflammasome-related factors, such as NOD-like receptor family pyrin domain containing 3, caspase-1, and interleukin-1β.
Results:
The results showed that ghMSCs increased viability and proliferation and reduced the toxicity of NSCs injured by Aβ by reducing the NRLP3 inflammasome activation of NSCs induced by Aβ.
Conclusions
In this study, we confirmed that ghMSCs could protect NSCs in an in vitro model of AD through the regulation of inflammatory response.
8.Glia-Like Cells from Human Mesenchymal Stem Cells Protect Neural Stem Cells in an In Vitro Model of Alzheimer's Disease by Reducing NLRP-3 Inflammasome
Mina HWANG ; Se hyeon SONG ; Mi-Sook CHANG ; Seong-Ho KOH
Dementia and Neurocognitive Disorders 2021;20(1):1-8
Background:
and Purpose: Neural stem cells (NSCs) have the ability to regenerate, proliferate, and differentiate, enabling them to play important roles in the recovery of the damaged nervous system. However, in neurodegenerative diseases such as Alzheimer's disease (AD), the NSCs are damaged as well. Glia-like cells from human mesenchymal stem cells (ghMSCs) are functionally enhanced adult stem cells. In the present study, we investigated whether ghMSCs could protect NSCs from amyloid beta (Aβ)-mediated toxicity.
Methods:
Rat NSCs were obtained from E13–14 fetal rat cortices. NSCs were seeded in pre-coated plates, and the next day, cells were simultaneously treated with 20 μM Aβ and 0.4 μm pore insert well-seeded ghMSCs. After 48 hours of co-treatment, cell viability and proliferation were evaluated. After 2 hours of co-treatment, western blotting was performed to measure inflammasome-related factors, such as NOD-like receptor family pyrin domain containing 3, caspase-1, and interleukin-1β.
Results:
The results showed that ghMSCs increased viability and proliferation and reduced the toxicity of NSCs injured by Aβ by reducing the NRLP3 inflammasome activation of NSCs induced by Aβ.
Conclusions
In this study, we confirmed that ghMSCs could protect NSCs in an in vitro model of AD through the regulation of inflammatory response.
9.Complete Remission of Dural-Based Leptomeningeal Metastasis in Patient With Non-Small Cell Lung Cancer by Osimertinib
Jemin HWANG ; Beung Chul AHN ; So Hyeon JI ; Ho-Shin GWAK
Brain Tumor Research and Treatment 2024;12(4):245-249
We report complete remission of dural-based leptomeningeal metastasis (LM) in an 80-year-old female patient with non-small cell lung cancer (NSCLC) by osimertinib. She was diagnosed with NSCLC (adenocarcinoma, T4N3M1a) 8 years ago. Mutation analysis of biopsied tissue revealed exon 19 deletion positive, and gefitinib was prescribed. Follow-up chest CT showed a radiological response, and wholebody positron emission tomography 3 years later revealed the disappearance of the previous high-uptake lesions. The medication was continued for maintenance but stopped 4 years later due to intolerable dermatitis. Two years after discontinuing chemotherapy, the patient had a gait disturbance, and brain MRI revealed a right cerebellar mass (diameter [d]=3 cm) with peritumoral edema, compatible with solitary brain metastasis. Retromastoid suboccipital craniotomy and gross total removal of the dura-attached lesion were performed. As the systemic cancer status evaluation revealed no radiological cancer lesion, only tumor bed radiation therapy was given (4,000 cGy/10 fractions) without re-introducing gefitinib. She was followed with a brain MRI at 6-month intervals, and a brain MRI 2 years postoperatively revealed a dural-based extra-axial mass in the left prepontine cistern (d=2.2 cm). Serial cerebrospinal fluid (CSF) cytology was positive for cancer cells. Upon LM diagnosis, the third-generation receptor tyrosine kinase inhibitor osimertinib was given. Two-month follow-up CSF cytology and five consecutive tests over 14 months demonstrated negative conversion. Five-month follow-up brain MRI revealed near complete remission of dural-based LM, and the response was maintained until the 13-month follow-up brain MRI.
10.Complete Remission of Dural-Based Leptomeningeal Metastasis in Patient With Non-Small Cell Lung Cancer by Osimertinib
Jemin HWANG ; Beung Chul AHN ; So Hyeon JI ; Ho-Shin GWAK
Brain Tumor Research and Treatment 2024;12(4):245-249
We report complete remission of dural-based leptomeningeal metastasis (LM) in an 80-year-old female patient with non-small cell lung cancer (NSCLC) by osimertinib. She was diagnosed with NSCLC (adenocarcinoma, T4N3M1a) 8 years ago. Mutation analysis of biopsied tissue revealed exon 19 deletion positive, and gefitinib was prescribed. Follow-up chest CT showed a radiological response, and wholebody positron emission tomography 3 years later revealed the disappearance of the previous high-uptake lesions. The medication was continued for maintenance but stopped 4 years later due to intolerable dermatitis. Two years after discontinuing chemotherapy, the patient had a gait disturbance, and brain MRI revealed a right cerebellar mass (diameter [d]=3 cm) with peritumoral edema, compatible with solitary brain metastasis. Retromastoid suboccipital craniotomy and gross total removal of the dura-attached lesion were performed. As the systemic cancer status evaluation revealed no radiological cancer lesion, only tumor bed radiation therapy was given (4,000 cGy/10 fractions) without re-introducing gefitinib. She was followed with a brain MRI at 6-month intervals, and a brain MRI 2 years postoperatively revealed a dural-based extra-axial mass in the left prepontine cistern (d=2.2 cm). Serial cerebrospinal fluid (CSF) cytology was positive for cancer cells. Upon LM diagnosis, the third-generation receptor tyrosine kinase inhibitor osimertinib was given. Two-month follow-up CSF cytology and five consecutive tests over 14 months demonstrated negative conversion. Five-month follow-up brain MRI revealed near complete remission of dural-based LM, and the response was maintained until the 13-month follow-up brain MRI.