Objectives: This study aimed to comparatively analyze the demographic characteristics and various other factors influencing those attempting suicide from the younger and older generations during the COVID-19 pandemic. Methods: The study included subjects who visited the emergency room of the Gachon University Gil Medical Center in Incheon after attempting to cause self-harm or commit suicide. Of the total of 598 cases, the characteristics of 383 subjects belonging to the younger generation (39 years old or younger) and 215 to the older generation subject (40 years old or older) were retrospectively compared. Results: The younger generation subjects who attempted suicide had significantly higher rates of psychiatric disorders such as bipolar disorder and histories of past suicide attempts compared to the older generation. Those attempting suicide among the younger generation were less planned in their attempts to commit suicide than the older generation, and the authenticity of their suicide attempts was significantly lower. Conclusion The younger generation subjects who attempted suicide were more affected by mental illnesses and more impulsive than those of the older generation, and the authenticity and medical lethality of their suicide attempts were low. An individual-centric intervention strategy for suicide prevention is needed in consideration of these generational characteristics.

Until now microsatellite (MS) have been a popular choice of markers for parentage verification. Recently many countries have moved or are in process of moving from MS markers to single nucleotide polymorphism (SNP) markers for parentage testing. FAO-ISAG has also come up with a panel of 200 SNPs to replace the use of MS markers in parentage verification. However, in many countries most of the animals were genotyped by MS markers till now and the sudden shift to SNP markers will render the data of those animals useless. As National Institute of Animal Science in South Korea plans to move from standard ISAG recommended MS markers to SNPs, it faces the dilemma of exclusion of old animals that were genotyped by MS markers. Thus to facilitate this shift from MS to SNPs, such that the existing animals with MS data could still be used for parentage verification, this study was performed. In the current study we performed imputation of MS markers from the SNPs in the 500-kb region of the MS marker on either side. This method will provide an easy option for the labs to combine the data from the old and the current set of animals. It will be a cost efficient replacement of genotyping with the additional markers. We used 1,480 Hanwoo animals with both the MS data and SNP data to impute in the validation animals. We also compared the imputation accuracy between BovineSNP50 and BovineHD BeadChip. In our study the genotype concordance of 40% and 43% was observed in the BovineSNP50 and BovineHD BeadChip respectively.
Animals ; Cattle ; Genotype ; Korea* ; Methods ; Microsatellite Repeats* ; Polymorphism, Single Nucleotide

PURPOSE: This study was conducted to compare the characteristics of first suicide attempt patients with self-poisoning with those of self-injured patients. METHODS: In this retrospective data analysis, data were collected from emergency department patients who made a first suicide attempt between October 2013 and January 2017. Data included demographic, socioeconomic, physical and mental health status, method of suicide attempt, and authenticity of suicide intent. Patients were classified into a self-poisoning and self-injury group. RESULTS: Among 2,252 patients, 788 patients were making their first suicide attempt. Of these patients, 443 were self-poisoning patients. Males were less common among the self-poisoning group. Cohabitants (303 [89.4%] vs. 193 [81.4%]; p=0.010), married state (214 [57.4%] vs. 108 [41.2%]; p<0.001), and asking for help after suicide attempt (136 [86.1%] vs. 103 [73.6%]; p=0.009) was more common in the self-poisoning group than the self-injury group. However, planned suicide attempt was more frequent in the self-injury group (26 [16.0%] vs. 9 [4.7%]; p=0.001). Moreover, authenticity of suicide intent was higher in the self-injury group (12 [11.3%] vs. 42 [40.4%]; p<0.001). CONCLUSION: In the self-poisoning group, there was a higher rate of females, married people, existing cohabitants, and tendency to ask for help after suicide attempt. There were also more impulsive suicide attempts in this group. The results presented herein will help prevent self-poisoning suicide attempts among high risk patients.
Emergency Service, Hospital ; Female ; Humans ; Male ; Mental Health ; Methods ; Poisoning ; Retrospective Studies ; Statistics as Topic ; Suicide*

We previously demonstrated that there are acute and delayed phases of renal protection against renal ischemia and reperfusion (IR) injury with renal ischemic preconditioning (IPC). This study assessed whether hepatic IPC could also reduce distant renal IR injury through the blood stream-mediated supply of reactive oxygen species (ROS). Male C57BL/6 mice were randomly divided into four groups: group I, sham operated including right nephrectomy; group II (IR), left renal ischemia for 30 min and reperfusion injury; group III (IPC-IR), hepatic ischemia for 10 min followed by 10 min of reperfusion before left renal IR injury; group IV (MPG - IPC + IR), pretreated with 100 mg/kg N-(2-mercaptopropionyl)-glycine (MPG) 15 min before hepatic IPC and left renal IR injury. Renal function, histopathologic findings, proinflammatory cytokines, and cytoprotective proteins were evaluated 15 min or 24 hr after reperfusion. Hepatic IPC attenuated the expression of proinflammatory cytokines, tumor necrosis factor alpha, intercellular adhesion molecule 1, and induced inducible nitric-oxide synthase, and the phosphorylation of Akt in the murine kidney. Renal function was better preserved in mice with hepatic IPC (group III) than groups II or IV. Hepatic IPC protects against distant renal IR injury through the blood stream-delivery of hepatic IPC-induced ROS, by inducing cytoprotective proteins, and by inhibiting inflammatory reactions.
Animals ; Intercellular Adhesion Molecule-1/genetics/metabolism ; *Ischemic Preconditioning ; Kidney/drug effects/metabolism/pathology/physiopathology ; Liver/blood supply/drug effects/physiopathology ; Male ; Mice ; Mice, Inbred C57BL ; Nitric Oxide Synthase Type II/metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-akt/metabolism ; Reactive Oxygen Species/metabolism ; Reperfusion Injury/*metabolism/pathology/prevention & control ; Tiopronin/pharmacology ; Tumor Necrosis Factor-alpha/genetics/metabolism

BACKGROUND: The regional lymph nodal status is the most powerful independent predictor of survival for patients with clinical N0 primary cutaneous malignant melanoma. OBJECTIVE: We wanted to evaluate the feasibility and morbidity of the sentinel lymph node biopsy (SLNB) staging using a multidisciplinary team approach, in cooperation with other surgical departments, at a university hospital setting. METHODS: Twenty two patients with cutaneous melanoma and who were treated at Kyungpook National University Hospital were included in this study. They all received SLNB, which was done by the Departments of Dermatology and General Surgery. We evaluated the feasibility and side effects of SLNB. RESULTS: Pathologically-positive sentinel nodes were found in 7 of the 22 cases (31.8%) and all 7 patients were consequently upstaged. The whole process involved in SLNB was well tolerated by nearly all the patients, with only mild and transient complications being observed. CONCLUSION: We suggest that in a Korean setting, utilizing SLNB with a multi-disciplinary team approach is a technically feasible procedure that is able to detect occult nodal metastasis with low morbidity rates in patients with cutaneous malignant melanoma.
Dermatology ; Humans ; Melanoma ; Neoplasm Metastasis ; Nitriles ; Pyrethrins ; Sentinel Lymph Node Biopsy

BACKGROUND: In addition to causing the loss of voluntary sensory and motor function, spinal cord injury (SCI) often creates a state of central neuropathic pain. Rats given SCI display increases in the activated form of transcription factors ERK 1/2 MAPK and CREB in the spinal cord, which correspond to allodynia in a model of neuropathic pain. This study was conducted to determine if low dose ketamine had an effect on the activation of ERK 1/2 and CREB in the development of neuropathic pain. METHODS: This study was conducted to evaluate ERK 1/2 and CREB protein in a sham operated (control) group, neuropathic pain and normal saline (NP + NS) group and neuropathic pain and ketamine (NP + Keta) group. To accomplish this, male Sprague-Dawley rats were anesthetized and then subjected to L5-L6 spinal nerve ligation (SNL, neuropathic rats). The total amounts of ERK 1/2 and CREB protein were then assessed by western blot analysis. In addition, changes in the amounts of ERK 1/2 and CREB mRNA were evaluated by RT-PCR. RESULTS: There was a significant increase in the amount of ERK 1/2 and CREB in the NP + NS group when compared with the sham group. However, the amount of ERK 1/2 and CREB protein induced due to SNL were significantly reduced by continuous infusion with ketamine in the NP + Keta group. CONCLUSIONS: The results of this study revealed a positive linkage between NMDA receptors and the ERK-CREB signaling pathway. Therefore, NMDA receptors could be the target of future therapeutic approaches. Additionally, the results of the present study provide additional evidence that low dose ketamine effectively prevents and treats central neuropathic pain following SNL.
Animals ; Blotting, Western ; Cyclic AMP Response Element-Binding Protein ; Humans ; Hyperalgesia ; Ketamine ; Ligation ; Male ; Neuralgia ; Rats ; Rats, Sprague-Dawley ; Receptors, N-Methyl-D-Aspartate ; RNA, Messenger ; Salicylamides ; Spinal Cord ; Spinal Cord Injuries ; Spinal Nerves ; Transcription Factors

OBJECTIVE: To verify the efficacy of 6cm segmental nerve conduction study in ulnar neuropathy at the elbow (UNE). METHOD: Ulnar nerve conduction studies were performed unilaterally in twenty five asymptomatic healthy adult volunteers and twenty five symptomatic patients with UNE. Twenty five symptomatic patients with UNE were diagnosed by standard ulnar nerve conduction studies, and needle EMG study. In the same healthy controls and patients groups, 6 cm and 10 cm segmental study were then performed at the elbow. The sensitivity and specificity of 6 cm segmental study were compared with those of 10 cm segmental study in these patients. RESULTS: The sensitivity and specificity came out to be 76% and 92% for the 6 cm segmental study and, 52% and 96% for the 10 cm segmental study. CONCLUSION: The sensitivity of 6 cm segmental NCS was much higher compared with 10 cm segmental NCS, whereas the specificity was similar in both tests. For screening of the UNE, 6 cm segmental NCS seems to be a more efficacious test.
Adult ; Elbow* ; Electromyography ; Humans ; Mass Screening ; Needles ; Neural Conduction ; Sensitivity and Specificity ; Ulnar Nerve ; Ulnar Neuropathies* ; United Nations ; Volunteers

OBJECTIVE: To determine the clinical utility of flexor carpi radialis (FCR) H-reflex with and without facilitation in the diagnosis of 7th cervical radiculopathy. METHOD: Thirty-four subjects (27 men, 7 women) participated in this study showed symptoms and signs suggesitive of cervical radiculopathy and every subject had single herniated cervical disc on MRI study. All participants underwent electrophysiologic study including routine nerve conduction study (NCS), electromyography (EMG), FCR H-reflexes with and without facilitation in both arms. Abnormal parameters for FCR H-reflex were 1) side to side latency difference more than 1.0 msec, 2) absence of FCR H-reflex in one side, 3) side to side amplitude ratio below 33% for without facilitation and 22% for facilitation. If the subjects had at least one of the three abnormal parameters, we concluded as having abnormal FCR H-reflex. RESULTS: In the FCR H-reflex without facilitation group, we were not able to elicit FCR H-reflex in both arms in 17 subjects. Among the 17 subjects with elicited FCR H-reflex, 7 had abnormal FCR H-reflex (C7 root; 4, other roots; 3). In the FCR H-reflex with facilitation group, FCR H-reflex was obtained in 32 subjects, 13 out of the 32 showed abnormal FCR H-reflex (C7 root; 6, other roots; 7). The sensitivity and specificity of FCR H-reflex without facilitation in the diagnosis of 7th cervical radiculopathy were 67%, 73%, with facilitation it were 50%, 65%. CONCLUSION: Even though FCR H-reflex without facilitation is superior in its sensitivity and specificity, low elicitabiliy is the factor that limits its clinical utility. FCR H-reflex with facilitation with its good elicitability, seems to be a useful adjunctive method to routine NCS and EMG examination in the diagnosis of 7th cervical radiculopathy.
Arm ; Diagnosis ; Electromyography ; H-Reflex* ; Humans ; Magnetic Resonance Imaging ; Male ; Neural Conduction ; Radiculopathy* ; Sensitivity and Specificity

BACKGROUND: During recent two decades of crucial revision of some cornerstone concepts has opened new horizons in neurosciences. Modern basic viewpoints include the idea of high CNS plasticity which means not only rearrangement of neurons and their interconnections, but also the formation of new neural cells in humans and animals during their whole life span. The purpose of this study is to harvest neural stem cell from the adult rat brain using the high speed centrifugation method and study the characteristics of these cell. METHODS: 60 rats (Fisher 344, 150-160 g) brain were saved under inhalation anesthesia and dissect the subventricular zone under the microscope. The brain tissue was digested with enzyme to make a cell suspension. The cell suspension was processed high speed centrifugation to separate the neural stem/progenitor cells according to the buoyancy. After 2 weeks culture, immuno-staining (O4, GFAP, Nestin, beta-tubulin III and DAPI) were performed and replated the cultured cells. RESULTS: The 2 weeks culture cells were positive 92.8% in Nestin, 91.5% in O4 and 87.6% in Gal-C. But only positive 1.4% in beta-tubulin III and 5.5% in GFAP. And replated cell culture shows similar results compared to the primary culture. CONCLUSIONS: With this high speed centrifugation method, authors can harvest neural stem/progenitor cells from the adult rat brain. Although we have many limitations using these cell in clinical trial, but we can afford to next step on neural stem cell research.
Adult ; Anesthesia, Inhalation ; Animals ; Brain* ; Cell Culture Techniques ; Cells, Cultured ; Centrifugation* ; Hippocampus ; Humans ; Nestin ; Neural Stem Cells* ; Neurons ; Neurosciences ; Plastics ; Rats* ; Tubulin

BACKGROUND: Anesthetic procedures are major potent stimulus for the neuroendocrine hormonal axis, which results in release of the stress hormone. It is important to know the influence of specific anesthetic procedures on those host responses. We compared endocrine stress response and anesthesia characteristics for TIVA (total intravenous anesthesia) and VIMA (volatile induction and maintenance of anesthesia). METHODS: Forty patients scheduled for elective total abdominal hysterectomy were randomly assigned to TIVA or VIMA group. The patients in TIVA group (n = 20) received target controlled infusion (TCI) of propofol and fentanyl TCI with Stelpump software, and the patients in VIMA group (n = 20) received sevoflurane-nitrous oxide for induction (6%) and maintenance (1.5%) of anesthesia. Blood sampling was done 5 minutes before induction (baseline blood sample, BBS), just after intubation (intubation blood sample, IBS), just after extubation (extubation blood sample, EBS), and at arrival in recovery room (recovery room blood sample, RBS). Plasma concentration of glucose, cortisol, epinephrine, norepinephrine were measured. Bispectal Index (BIS) and systolic, diastolic blood pressure, heart rate, induction and recovery profiles were also measured. RESULTS: In both groups, there was significant increase of the blood cortisol and glucose level in EBS and RBS. But only in VIMA group, there was significant increase of the blood cortisol level in IBS. There was no change of the blood epinephrine and norepinephrine in both groups at EBS and RBS, but only in VIMA group, there was significant increase of epinephrine and norepinephrine at IBS. Blood pressure and heart rate increased significantly at IBS in VIMA group, compared with TIVA group. CONCLUSIONS: In VIMA group, there was significant increase of stress response and hemodynamic change only during induction of anesthesia. However, in TIVA group, there was no significant increase of stress response and hemodynamic change during induction, maintenance and recovery of anesthesia.
Anesthesia* ; Axis, Cervical Vertebra ; Blood Pressure ; Epinephrine ; Fentanyl ; Glucose ; Heart Rate ; Hemodynamics ; Humans ; Hydrocortisone ; Hysterectomy ; Intubation ; Norepinephrine ; Plasma ; Propofol ; Recovery Room