1.Successful replantation of an avulsed frontal scalp through microvascular anastomoses of only one artery and one vein: a case report
Dongjin KIM ; Somin OH ; Woo Shik JEONG
Archives of Craniofacial Surgery 2024;25(2):95-98
Scalp avulsion is a devastating injury. The best possible procedure is replantation. Several successful scalp replantations with anastomoses of several vessels in large defects have been reported. In this report, we present a case of replantation of a large scalp avulsion using revascularizing with only one artery and vein. Despite the initial signs of flap congestion, we could predict the survival of the replanted scalp and terminate the procedure after detecting good perfusion and washout with indocyanine green fluorescence imaging. The procedure was successful following the patient’s recovery of sensory and sweating functions without complications such as flap necrosis or infection. Several important factors for successful scalp replantation with positive esthetic and functional outcomes were considered.
2.The Roles of Innate Lymphoid Cells in the Development of Asthma.
Yeonduk WOO ; Dongjin JEONG ; Doo Hyun CHUNG ; Hye Young KIM
Immune Network 2014;14(4):171-181
Asthma is a common pulmonary disease with several different forms. The most studied form of asthma is the allergic form, which is mainly related to the function of Th2 cells and their production of cytokines (IL-4, IL-5, and IL-13) in association with allergen sensitization and adaptive immunity. Recently, there have been many advances in understanding non-allergic asthma, which seems to be related to environmental factors such as air pollution, infection, or even obesity. Cells of the innate immune system, including macrophages, neutrophils, and natural killer T cells as well as the newly described innate lymphoid cells, are effective producers of a variety of cytokines and seem to play important roles in the development of non-allergic asthma. In this review, we focus on recent findings regarding innate lymphoid cells and their roles in asthma.
Adaptive Immunity
;
Air Pollution
;
Asthma*
;
Cytokines
;
Immune System
;
Interleukin-5
;
Lung Diseases
;
Lymphocytes*
;
Macrophages
;
Natural Killer T-Cells
;
Neutrophils
;
Obesity
;
Th2 Cells
3.Effects of prebiotics in combination with probiotics on intestinal hydrolase activity, microbial population and immunological biomarkers in SD rats fed an AIN-93G diet
Min-Jeong KIM ; Dong-Gyeong JEON ; Yong LIM ; Insurk JANG
Laboratory Animal Research 2022;38(3):149-158
Background:
Gastrointestinal microbiota, which comprises hundreds of different types of microbes, biologically plays crucial roles in the host’s health. Probiotics (PRO) did not always have a positive benefit on the host, depending on strains of microbes and the physiochemical properties of prebiotics (PRE), indicating that the properties of PRE in combination with PRO might have different effects on the gut ecology. The aim of this study was to assess the effects of insoluble or soluble PRE with PRO on intestinal digestive hydrolase, the fecal microbes, and immunological biomarkers in SD rats fed an AIN-93G diet.
Results:
Forty, 8-week-old SD rats were randomly assigned to 4 groups with 10 replicates in each; cellulose (CELL), cellulose + probiotics (CELPRO), oatmeal (OATS), and oatmeal + probiotics (OATPRO) groups. After 4-week feeding trial, rats were treated with saline or lipopolysaccharide (LPS, 1 mg/kg) to examine the alleviating effects of PRO and PRE on immunological responses. There was a significant (p < 0.05) decrease in feed intake of rats fed the oatmeal supplemented diet without affecting growth performance. Blood triglyceride was significantly (p < 0.05) decreased in rats fed the oatmeal diet, and aspartate aminotransferase (AST) was significantly (p < 0.05) decreased in rats fed the PRO supplemented diet. Intestinal maltase, sucrose, and lactase activities were significantly (p < 0.05) higher in rats fed PRO compared with rats not fed PRO. Rats fed the oatmeal showed a significant (p < 0.01) increase in the fecal colony forming units (CFU) of Lactobacillus plantarum, Bacillus subtilis, and Saccharomyces cerevisiae compared with those fed cellulose. LPS-treated rats fed PRO showed a significant (p < 0.05) increase in blood secretory immunoglobulin A (sIgA) compared with those not fed PRO. The LPS-treated rats fed PRO resulted in decreased (p < 0.05) blood IL-6 compared with those not fed PRO, indicating that a dietary PRO alleviated inflammatory response in LPS-treated rats.
Conclusions
Dietary oatmeal increased fecal microbes, and PRO supplement resulted in increased intestinal hydrolase and immune functions of the host, demonstrating that soluble PRE with supplemented with PRO could be a more bioactive combination of synbiotics in SD rats.
4.Innate Type-2 Cytokines: From ImmuneRegulation to Therapeutic Targets
Hye Young KIM ; Dongjin JEONG ; Ji Hyung KIM ; Doo Hyun CHUNG
Immune Network 2024;24(1):e6-
The intricate role of innate type-2 cytokines in immune responses is increasingly acknowledged for its dual nature, encompassing both protective and pathogenic dimensions.Ranging from defense against parasitic infections to contributing to inflammatory diseases like asthma, fibrosis, and obesity, these cytokines intricately engage with various innate immune cells. This review meticulously explores the cellular origins of innate type-2 cytokines and their intricate interactions, shedding light on factors that amplify the innate type-2 response, including TSLP, IL-25, and IL-33. Recent advancements in therapeutic strategies, specifically the utilization of biologics targeting pivotal cytokines (IL-4, IL-5, and IL-13), are discussed, offering insights into both challenges and opportunities.Acknowledging the pivotal role of innate type-2 cytokines in orchestrating immune responses positions them as promising therapeutic targets. The evolving landscape of research and development in this field not only propels immunological knowledge forward but also holds the promise of more effective treatments in the future.
5.Predicting Peri-Device Leakage of Left Atrial Appendage Device Closure Using Novel Three-Dimensional Geometric CT Analysis.
Hyemoon CHUNG ; Byunghwan JEON ; Hyuk Jae CHANG ; Dongjin HAN ; Hackjoon SHIM ; In Jeong CHO ; Chi Young SHIM ; Geu Ru HONG ; Jung Sun KIM ; Yangsoo JANG ; Namsik CHUNG
Journal of Cardiovascular Ultrasound 2015;23(4):211-218
BACKGROUND: After left atrial appendage (LAA) device closure, peri-device leakage into the LAA persists due to incomplete occlusion. We hypothesized that pre-procedural three-dimensional (3D) geometric analysis of the interatrial septum (IAS) and LAA orifice can predict this leakage. We investigated the predictive parameters of LAA device closure obtained from baseline cardiac computerized tomography (CT) using a novel 3D analysis system. METHODS: We conducted a retrospective study of 22 patients who underwent LAA device closure. We defined peri-device leakage as the presence of a Doppler signal inside the LAA after device deployment (group 2, n = 5) compared with patients without peri-device leakage (group 1, n = 17). Conventional parameters were measured by cardiac CT. Angles theta and phi were defined between the IAS plane and the line, linking the LAA orifice center and foramen ovale. RESULTS: Group 2 exhibited significantly better left atrial (LA) function than group 1 (p = 0.031). Pre-procedural theta was also larger in this group (41.9degrees vs. 52.3degrees, p = 0.019). The LAA cauliflower-type morphology was more common in group 2. Overall, the patients' LA reserve significantly decreased after the procedure (21.7 mm3 vs. 17.8 mm3, p = 0.035). However, we observed no significant interval changes in pre- and post-procedural values of theta and phi in either group (all p > 0.05). CONCLUSION: Angles between the IAS and LAA orifice might be a novel anatomical parameter for predicting peri-device leakage after LAA device closure. In addition, 3D CT analysis of the LA and LAA orifice could be used to identify clinically favorable candidates for LAA device closure.
Atrial Appendage*
;
Foramen Ovale
;
Humans
;
Retrospective Studies
6.Lower Extremity Radicular Pain Caused by Entrapped Sigmoid Colon Between L5 and S1 Vertebrae.
Sanghyung KO ; Noh Kyoung PARK ; Kyoung Jin CHO ; Jung Hyun BAEK ; Jeong Wook LIM ; Dongjin CHOI ; Sangkuk KANG
Annals of Rehabilitation Medicine 2015;39(5):844-847
Intestinal entrapment between two vertebral bodies is very rare. In all previous cases, it occurred by major trauma. However, the bowel entrapment between two vertebral bodies without trauma has never been reported, not to mention as the cause of lower extremity radicular pain. We describe the case of an 82-year-old female patient with right lower extremity radicular pain without recent trauma history. The patient was diagnosed sigmoid colon entrapment between the L5 and S1 vertebrae by lumbar spinal computerized tomography and magnetic resonance imaging, and showed improvement in radicular pain after manual reduction of interpositioned colon during surgery. Intestinal entrapment between two vertebrae without trauma is caused by degenerative and vacuum changes of the intervertebral disc combined with the anterior longitudinal ligament injury.
Aged, 80 and over
;
Colon
;
Colon, Sigmoid*
;
Female
;
Humans
;
Intervertebral Disc
;
Longitudinal Ligaments
;
Lower Extremity*
;
Magnetic Resonance Imaging
;
Radiculopathy
;
Spine*
;
Vacuum
7.Disease-specific induced pluripotent stem cells: a platform for human disease modeling and drug discovery.
Jiho JANG ; Jeong Eun YOO ; Jeong Ah LEE ; Dongjin R LEE ; Ji Young KIM ; Yong Jun HUH ; Dae Sung KIM ; Chul Yong PARK ; Dong Youn HWANG ; Han Soo KIM ; Hoon Chul KANG ; Dong Wook KIM
Experimental & Molecular Medicine 2012;44(3):202-213
The generation of disease-specific induced pluripotent stem cell (iPSC) lines from patients with incurable diseases is a promising approach for studying disease mechanisms and drug screening. Such innovation enables to obtain autologous cell sources in regenerative medicine. Herein, we report the generation and characterization of iPSCs from fibroblasts of patients with sporadic or familial diseases, including Parkinson's disease (PD), Alzheimer's disease (AD), juvenile-onset, type I diabetes mellitus (JDM), and Duchenne type muscular dystrophy (DMD), as well as from normal human fibroblasts (WT). As an example to modeling disease using disease-specific iPSCs, we also discuss the previously established childhood cerebral adrenoleukodystrophy (CCALD)- and adrenomyeloneuropathy (AMN)-iPSCs by our group. Through DNA fingerprinting analysis, the origins of generated disease-specific iPSC lines were identified. Each iPSC line exhibited an intense alkaline phosphatase activity, expression of pluripotent markers, and the potential to differentiate into all three embryonic germ layers: the ectoderm, endoderm, and mesoderm. Expression of endogenous pluripotent markers and downregulation of retrovirus-delivered transgenes [OCT4 (POU5F1), SOX2, KLF4, and c-MYC] were observed in the generated iPSCs. Collectively, our results demonstrated that disease-specific iPSC lines characteristically resembled hESC lines. Furthermore, we were able to differentiate PD-iPSCs, one of the disease-specific-iPSC lines we generated, into dopaminergic (DA) neurons, the cell type mostly affected by PD. These PD-specific DA neurons along with other examples of cell models derived from disease-specific iPSCs would provide a powerful platform for examining the pathophysiology of relevant diseases at the cellular and molecular levels and for developing new drugs and therapeutic regimens.
Alzheimer Disease/genetics/*pathology
;
Cell Differentiation
;
Cells, Cultured
;
Diabetes Mellitus, Type 1/genetics/*pathology
;
Drug Discovery/*methods
;
Fibroblasts/cytology/metabolism/pathology
;
Gene Expression
;
Humans
;
Induced Pluripotent Stem Cells/cytology/metabolism/*pathology
;
Muscular Dystrophy, Duchenne/genetics/*pathology
;
Parkinson Disease/genetics/*pathology
8.Comparison of Safety and Efficiency of Hemodialysis Using Heparin-bound Hemophan with those of Saline Flushing Hemodialysis and Hemodialysis Using Low Dose Heparin in Patients at Risk of Bleeding.
Hyun Jin KIM ; Young Hwan LIM ; Min Ok KIM ; Hyun Jeong BEAK ; Yeon Sil DO ; Eun Hee JANG ; So Yeon CHOI ; Ho Myoung YEO ; Jung Ah KIM ; Beom KIM ; Bang Hoon LEE ; Woo Heon KANG ; Dongjin OH ; Wooseong HUH ; Dae Joong KIM ; Ha Young OH ; Yoon Goo KIM
Korean Journal of Nephrology 2005;24(2):246-254
OBJECTIVE: Although hemodialysis using heparin bound Hemophan (HBH-HD) has been reported to be a possible modality in patients at risk of bleeding, the efficiency and safety of HBH-HD is not certain. Therefore, we prospectively compared the safety and efficiency of HBH-HD with those of saline flushing HD (SF-HD) and HD using low dose heparin (LDH-HD) in 13 HD patients at risk of bleeding in a cross-over design. METHODS: The safety and efficiency were evaluated by measuring activated partial prothrombin time (aPTT) before and during HD, hemostasis time after needle removal, total blood compartment volume (TBCV) loss of dialyzer, urea clearance (K) and Kt/V. RESULTS: There was no difference in compression time needed to achieve hemostasis at puncture site after needle removal between HBH-HD, SF-HD and LDH-HD. During HBH-HD, there was a slight increase in aPTT at 15 min (50.6+/-4.5 sec), compared to predialysis levels (40.9+/-4.7 sec). In this cross- over study, aPTT during dialysis session was markedly higher in LDH-HD than those in HBH-HD or SF-HD (p<0.05). The loss of TBCV of the dialyzer was greater in SF-HD than HBH-HD or LDH-HD (17.4+/-1.9% vs. 12.4+/-1.4% vs. 10.1+/-1.8%). However, there was no difference in K (212.0+/-30.7 vs. 217.2+/-36.9 vs. 221.6+/- 29.5 mL/min) and Kt/V (1.22+/-0.12 vs. 1.24+/-0.16 vs. 1.26+/-0.18). CONCLUSION: We concluded that the safety and efficiency of HBH-HD are not different compared to SF-HD or LDH-HD and HBH-HD could an alternative hemodialysis method in patients at risk of bleeding.
Anticoagulants
;
Cross-Over Studies
;
Dialysis
;
Flushing*
;
Hemorrhage*
;
Hemostasis
;
Heparin*
;
Humans
;
Needles
;
Prospective Studies
;
Prothrombin Time
;
Punctures
;
Renal Dialysis*
;
Urea
9.Antioxidant effect of ergothioneine on in vitro maturation of porcine oocytes
Ji-Young JEONG ; Lian CAI ; Mirae KIM ; Hyerin CHOI ; Dongjin OH ; Ali JAWAD ; Sohee KIM ; Haomiao ZHENG ; Eunsong LEE ; Joohyeong LEE ; Sang-Hwan HYUN
Journal of Veterinary Science 2023;24(2):e24-
Background:
Ergothioneine (EGT) is a natural amino acid derivative in various animal organs and is a bioactive compound recognized as a food and medicine.
Objectives:
This study examined the effects of EGT supplementation during the in vitro maturation (IVM) period on porcine oocyte maturation and subsequent embryonic development competence after in vitro fertilization (IVF).
Methods:
Each EGT concentration (0, 10, 50, and 100 µM) was supplemented in the maturation medium during IVM. After IVM, nuclear maturation, intracellular glutathione (GSH), and reactive oxygen species (ROS) levels of oocytes were investigated. In addition, the genes related to cumulus function and antioxidant pathways in oocytes or cumulus cells were investigated. Finally, this study examined whether EGT could affect embryonic development after IVF.
Results:
After IVM, the EGT supplementation group showed significantly higher intracellular GSH levels and significantly lower intracellular ROS levels than the control group. Moreover, the expression levels of hyaluronan synthase 2 and Connexin 43 were significantly higher in the 10 µM EGT group than in the control group. The expression levels of nuclear factor erythroid 2-related factor 2 (Nrf2) and NAD(P)H quinone dehydrogenase 1 (NQO1) were significantly higher in the oocytes of the 10 µM EGT group than in the control group. In the assessment of subsequent embryonic development after IVF, the 10 µM EGT treatment group improved the cleavage and blastocyst rate significantly than the control group.
Conclusions
Supplementation of EGT improved oocyte maturation and embryonic development by reducing oxidative stress in IVM oocytes.