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1.
Journal of the Korean Society of Emergency Medicine ; : 241-248, 2023.
Article in Korean | WPRIM | ID: wpr-1001867

ABSTRACT

Objective@#This study examined the characteristics of patients visiting the emergency department (ED) with fever after the chronification of the coronavirus disease 2019 (COVID-19) pandemic. @*Methods@#This retrospective observational study analyzed the medical records of patients who visited the ED with fever from May 1 to October 31, 2021, and the corresponding period in 2019. This study was conducted at a single center in Seoul, Korea. @*Results@#There was no statistical difference in the comorbidities of the patients of the two groups: the AC (after the COVID-19 pandemic) group and the BC (before the COVID-19 pandemic) group. As for the level of consciousness at the time of ED arrival, there was a significantly larger decrease in consciousness (verbal response or less) in the AC group than in the BC group (P=0.002). In the case of the National Early Warning Score (NEWS), the proportion was higher in the AC group in the moderate-risk and high-risk groups (P=0.003). The median time from symptom onset to ED arrival was 15.7 hours in the BC group and 13.8 hours in the AC group, and there was no significant difference (P=0.137). When leaving the ED, the AC group had a higher admission rate to the ward and intensive care unit than the BC group. There was no statistical difference in the in-hospital mortality between the two groups (2.9% and 2.4%, respectively; P=0.62). @*Conclusion@#Patients who visited the emergency room with fever after one year of the COVID-19 pandemic showed a similar time from symptom onset to ED arrival compared to patients who visited before the COVID-19 pandemic. In addition, there was no difference in in-hospital mortality among these patients compared to those with fever before the COVID-19 pandemic.

2.
Journal of the Korean Society of Emergency Medicine ; : 70-78, 2023.
Article in Korean | WPRIM | ID: wpr-967879

ABSTRACT

Objective@#Early identification of COVID-19 in patients is important to prevent significant worsening of the disease. This study was undertaken to verify whether MEWS (Modified Early Warning Score), NEWS(National Early Warning Score), ROX index, and CURB-65, which are early diagnostic tools for severe respiratory diseases, could be applied to patients visiting the emergency room for COVID-19. @*Methods@#This retrospective observational study included patients who visited an emergency medical center from September 1 to October 31, 2020, and from January 1 to February 28, 2021. Based on the vital signs and blood tests during the emergency room visit, severity evaluation tools and early diagnostic tools for severe cases were used and compared according to their area under the curve (AUC) values. The primary outcome was in-hospital mortality, while the secondary outcomes were intensive care unit admission rate and the need for mechanical ventilation based on these four tools (MEWS, NEWS, ROX index, and CURB-65). @*Results@#A total of 667 patients were analyzed. No significant difference was determined between the non-survivor group and survivor group in the MEWS values (P=0.13), but statistically significant differences were observed for NEWS (5 vs. 1, P<0.05), CURB-65 (2 vs. 1, P<0.05), and ROX index (16.61 vs. 23.1, P<0.01). The AUC value of NEWS for death prediction indicated a good predictive power at 0.80, while that of MEWS showed a low predictive power at 0.57, which was statistically significant. Moreover, the AUC values of CURB-65 and ROX index did not differ significantly from values obtained for NEWS. @*Conclusion@#As early diagnostic tools for predicting death in COVID-19 patients, NEWS, ROX index, and CURB-65 showed excellent discrimination ability, whereas MEWS showed statistically and significantly lower discrimination ability.

3.
Journal of Korean Medical Science ; : e198-2022.
Article in English | WPRIM | ID: wpr-938064

ABSTRACT

Background@#To evaluate how intrauterine stress affects extremely premature infants in terms of intrauterine growth restriction. We hypothesized that extremely premature infants with mildly-low ponderal index (MPI) would have better neonatal outcomes. @*Methods@#We selected 2,721 subjects of 23 to 28 weeks of gestation between 2013 and 2015 from Korean Neonatal Network database. They were divided into 4 groups based on ponderal index (PI) percentile; PI ≤ 3rd as severely-low PI (SPI, n = 82), 3rd 90th as high PI (HPI, n = 270). @*Results@#The mortality in MPI and API groups was comparable (16.3% vs. 16.9%). It was significantly lower than that in the SPI and HPI groups (30.5% and 24.9%, respectively;P = 0.001). The MPI and API groups had better neonatal morbidities compared with the SPI and/or HPI groups, while the MPI group (8.2%) showed a lower incidence of severe intraventricular hemorrhage (IVH) than the other groups (SPI, 21.3%; API, 15.0%; HPI, 19.7%, respectively; P = 0.004). The MPI group had a trend of a bottom in neonatal mortality and morbidities in extremely premature infants. @*Conclusion@#The MPI and API groups had lower mortality, massive pulmonary hemorrhage, severe bronchopulmonary dysplasia or death, pulmonary hypertension and neonatal seizure rates than the SPI and/or HPI groups, while the MPI group showed a lower incidence of severe IVH than the other groups. We speculate that the lower incidence of neonatal morbidities and mortality in the MPI group indicating mild intrauterine stress might accelerate fetal maturation resulting in better outcomes in extremely premature infants.

4.
Neonatal Medicine ; : 135-140, 2022.
Article in English | WPRIM | ID: wpr-968401

ABSTRACT

Pericardial effusion (PCE) in neonates has various clinical presentations depending on the amount and speed of fluid accumulation and can cause cardiac tamponade (CT). We report a case of rapidly accumulating PCE and near-fatal CT with an umbilical venous catheter successfully resolved by emergent echo-guided pericardiocentesis in a term infant who had been hospitalized with meconium aspiration syndrome and persistent pulmonary hypertension. This case report suggests that if a patient with an intracardiac umbilical catheter shows sudden cardiopulmonary instability, the possibility of PCE and CT should be considered. Furthermore, if necessary, emergency drainage of the PCE and removal of the umbilical catheter should be immediately performed.

5.
Journal of the Korean Society of Emergency Medicine ; : 509-524, 2021.
Article in English | WPRIM | ID: wpr-916537

ABSTRACT

Objective@#The coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus-2, is a global concern. This study aimed to examine the clinical characteristics, demographics and outcomes of COVID-19 patients in the emergency department (ED) and explore clinical predictors of in-hospital mortality. @*Methods@#This single-center, retrospective, observational study used 1,003 adult patients with laboratory-confirmed COVID-19 who went to the ED and were admitted to the hospital between February 28 and September 30, 2020. @*Results@#The median age of the included patients was 55 (37-68) years, and 533 were women (53.1%). Severe COVID-19 was noted in 173 patients (17.2%); seven patients (0.7%) received mechanical ventilation. The mortality rate was 2.1%. Multivariable Cox regression analysis found the risk factors associated with in-hospital death of patients (age >70 years [hazard ratio (HR), 27.411; P70 years, hypoalbuminemia, CURB-65≥3 and thrombocytopenia on admission were independent risk factors for mortality in patients hospitalized with COVID-19. Early detection of these predictors and application of CURB-65 score in the ED may provide guidance for appropriate risk stratification at triage and disposition of patients at increased risk of poor prognosis.

6.
Journal of the Korean Society of Emergency Medicine ; : 647-656, 2021.
Article in Korean | WPRIM | ID: wpr-916522

ABSTRACT

Objective@#A suicide attempt by self-poisoning is a common cause of admissions to the emergency department (ED). Management of such intentiona poisoning often requires complicated medical procedures, resulting in a longer length of stay (LOS) as compared to other cases that require treatment in the ED. This study aimed to determine the factors affecting a longer LOS in self-poisoning patients. @*Methods@#This was a retrospective study wherein all the medical charts of patients who visited the ED of one hospital, from August 2016 to July 2019, because of intentional self-poisoning, were reviewed. @*Results@#Most of the patients visited the ED involuntarily and there were almost twice as many female patients as males. Almost half of the patients were referred to the psychiatry department. A comparison of various factors within the LOS groups revealed significant differences in mental status, guardian co-visitation, patient gender, psychiatric referral, and poisoning substance. Moreover, the LOS had a stronger association with the pre-consultation period than the consultation to decision-making period. @*Conclusion@#To reduce the LOS, it seems important to make a rapid decision on whether to observe the patient in the ED and wait until the workup is completed or to admit and then evaluate the patient in the ward. If the clinicians cannot obtain enough information to evaluate the patient for appropriate management, short-term admission may be an option to reduce the LOS and to provide a stable evaluation.

7.
Journal of Korean Medical Science ; : e332-2021.
Article in English | WPRIM | ID: wpr-915436

ABSTRACT

Background@#Lipopolysaccharide (LPS) exerts cytotoxic effects on brain cells, especially on those belonging to the oligodendrocyte lineage, in preterm infants. The susceptibility of oligodendrocyte lineage cells to LPS-induced inflammation is dependent on the developmental stage. This study aimed to investigate the effect of LPS on oligodendrocyte lineage cells at different developmental stages in a microglial cell and oligodendrocyte coculture model. @*Methods@#The primary cultures of oligodendrocytes and microglia cells were prepared from the forebrains of 2-day-old Sprague–Dawley rats. The oligodendrocyte progenitor cells (OPCs) co-cultured with microglial cells were treated with 0 (control), 0.01, 0.1, and 1 µg/mL LPS at the D3 stage to determine the dose of LPS that impairs oligodendrocyte differentiation. The co-culture was treated with 0.01 µg/mL LPS, which was the lowest dose that did not impair oligodendrocyte differentiation, at the developmental stages D1 (early LPS group), D3 (late LPS group), or D1 and D3 (double LPS group). On day 7 of differentiation, oligodendrocytes were subjected to neural glial antigen 2 (NG2) and myelin basic protein (MBP) immunostaining to examine the number of OPCs and mature oligodendrocytes, respectively. @*Results@#LPS dose-dependently decreased the proportion of mature oligodendrocytes (MBP+ cells) relative to the total number of cells. The number of MBP+ cells in the early LPS group was significantly lower than that in the late LPS group. Compared with those in the control group, the MBP+ cell numbers were significantly lower and the NG2+ cell numbers were significantly higher in the double LPS group, which exhibited impaired oligodendrocyte lineage cell development, on day 7 of differentiation. @*Conclusion@#Repetitive LPS stimulation during development significantly inhibited brain cell development by impairing oligodendrocyte differentiation. In contrast, brain cell development was not affected in the late LPS group. These findings suggest that inflammation at the early developmental stage of oligodendrocytes increases the susceptibility of the preterm brain to inflammation-induced injury.

8.
Journal of the Korean Society of Emergency Medicine ; : 222-230, 2021.
Article in Korean | WPRIM | ID: wpr-901209

ABSTRACT

Objective@#Predictive tools such as the Glasgow Blatchford Score (GBS) and Pre-Rockall Score (PRS) have been used to foresee risks for gastrointestinal patients. This study was undertaken to determine the usefulness of the various available predictive tools in a vulnerable population. @*Methods@#Data of patients with vulnerable upper gastrointestinal bleeding, who visited the emergency room from January 1, 2017 to December 31, 2018, were retrospectively examined. The GBS and PRS values were determined for all patients. Predictions of therapeutic endoscopy were evaluated with the area under curve (AUC) in the receiver operatory characteristic (ROC) curve. @*Results@#A total of 152 patients were included in the study, 46 of whom required therapeutic endoscopes. In the area below the ROC curve, higher GBS values were obtained as compared to PRS in predicting therapeutic endoscopy (AUC, 0.726; 95% confidence interval [CI], 0.648-0.795 vs. 0.705; 95% CI, 0.626-0.776; P=0.689, respectively), transfusion (AUC, 0.861; 95% CI, 0.796-0.912 vs. 0.715; 95% CI, 0.637-0.786; P=0.001, respectively), and 30-day mortality (AUC, 0.698; 95% CI, 0.618-0.770 vs. 0.622; 95% CI, 0.540-0.699; P=0.351, respectively). Considering GBS 0, we determined with 100% sensitivity and 4.72% specificity that endoscopic treatment is redundant. @*Conclusion@#Compared to PRS, GBS excelled in predicting interventional treatment (endoscopy, transfusion) of vulnerable upper gastrointestinal patients, as well as the 30-day mortality. GBS is more useful in predicting low-risk patients that do not require treatment endoscopy, and is therefore a suitable procedure for outpatient care.

9.
Journal of the Korean Society of Emergency Medicine ; : 120-133, 2021.
Article in Korean | WPRIM | ID: wpr-901188

ABSTRACT

Objective@#The coronavirus disease 2019 (COVID-19) outbreak is currently ravaging the world and is a major threat to public health. Healthcare workers (HCWs) are at a high risk of acquiring and transmitting COVID-19. Hence, HCWs are also experiencing emotional and behavioral changes. The purpose of this study was to compare emotional changes and stress between occupations and to investigate the impact of emotions of HCWs during the COVID-19 outbreak. @*Methods@#An anonymous, self-administered, previously validated questionnaire was given to HCWs at a hospital dedicated to infectious diseases in Korea during the COVID-19 outbreak. The participants were asked to evaluate stress factors, depressive moods, trauma, reasons for continuing to work, things that helped them work, coping strategies to reduce stress, motivators that could help them work during future outbreaks, and what they would like to do after the outbreak was over. @*Results@#The total number of participants was 400. The average age of participants was 34.69±9.44. Stress and depressive moods showed variations in the job-to-job comparisons. Ethical duty and the professionalism of the HCWs pushed them to continue with their jobs. The news of a decline in the number of patients was helpful to HCWs. The implementation of personal hygiene programs helped in reducing stress. The provision of adequate personal protective equipment was a factor that would encourage them to work during any future outbreak. The participants wanted to go on a trip after the outbreak was over. @*Conclusion@#Our findings indicate that the COVID-19 outbreak had a significant emotional impact on HCWs. The concerns of HCWs may affect their work efficiency in an outbreak and should be addressed by incorporating appropriate management strategies while planning to combat an outbreak.

10.
Journal of Genetic Medicine ; : 60-63, 2021.
Article in English | WPRIM | ID: wpr-899327

ABSTRACT

Gabriel–de Vries syndrome, caused by the mutation of YY1, is a newly defined genetic syndrome characterized by developmental delay, facial dysmorphism, and intrauterine growth retardation. A 7-month-old girl presented developmental delay and subtle facial dysmorphism including facial asymmetry, micrognathia, and low-set ears. Whole exome sequencing identified a de novo heterozygous missense variant in the YY1 (c.1220A>G; p.His407Arg) gene. Here, we examined the clinical and genetic characteristics of an infant with a novel likely pathogenic variant of YY1. This case expands the phenotypic spectrum of Gabriel–de Vries syndrome.

11.
Journal of the Korean Society of Emergency Medicine ; : 222-230, 2021.
Article in Korean | WPRIM | ID: wpr-893505

ABSTRACT

Objective@#Predictive tools such as the Glasgow Blatchford Score (GBS) and Pre-Rockall Score (PRS) have been used to foresee risks for gastrointestinal patients. This study was undertaken to determine the usefulness of the various available predictive tools in a vulnerable population. @*Methods@#Data of patients with vulnerable upper gastrointestinal bleeding, who visited the emergency room from January 1, 2017 to December 31, 2018, were retrospectively examined. The GBS and PRS values were determined for all patients. Predictions of therapeutic endoscopy were evaluated with the area under curve (AUC) in the receiver operatory characteristic (ROC) curve. @*Results@#A total of 152 patients were included in the study, 46 of whom required therapeutic endoscopes. In the area below the ROC curve, higher GBS values were obtained as compared to PRS in predicting therapeutic endoscopy (AUC, 0.726; 95% confidence interval [CI], 0.648-0.795 vs. 0.705; 95% CI, 0.626-0.776; P=0.689, respectively), transfusion (AUC, 0.861; 95% CI, 0.796-0.912 vs. 0.715; 95% CI, 0.637-0.786; P=0.001, respectively), and 30-day mortality (AUC, 0.698; 95% CI, 0.618-0.770 vs. 0.622; 95% CI, 0.540-0.699; P=0.351, respectively). Considering GBS 0, we determined with 100% sensitivity and 4.72% specificity that endoscopic treatment is redundant. @*Conclusion@#Compared to PRS, GBS excelled in predicting interventional treatment (endoscopy, transfusion) of vulnerable upper gastrointestinal patients, as well as the 30-day mortality. GBS is more useful in predicting low-risk patients that do not require treatment endoscopy, and is therefore a suitable procedure for outpatient care.

12.
Journal of the Korean Society of Emergency Medicine ; : 120-133, 2021.
Article in Korean | WPRIM | ID: wpr-893484

ABSTRACT

Objective@#The coronavirus disease 2019 (COVID-19) outbreak is currently ravaging the world and is a major threat to public health. Healthcare workers (HCWs) are at a high risk of acquiring and transmitting COVID-19. Hence, HCWs are also experiencing emotional and behavioral changes. The purpose of this study was to compare emotional changes and stress between occupations and to investigate the impact of emotions of HCWs during the COVID-19 outbreak. @*Methods@#An anonymous, self-administered, previously validated questionnaire was given to HCWs at a hospital dedicated to infectious diseases in Korea during the COVID-19 outbreak. The participants were asked to evaluate stress factors, depressive moods, trauma, reasons for continuing to work, things that helped them work, coping strategies to reduce stress, motivators that could help them work during future outbreaks, and what they would like to do after the outbreak was over. @*Results@#The total number of participants was 400. The average age of participants was 34.69±9.44. Stress and depressive moods showed variations in the job-to-job comparisons. Ethical duty and the professionalism of the HCWs pushed them to continue with their jobs. The news of a decline in the number of patients was helpful to HCWs. The implementation of personal hygiene programs helped in reducing stress. The provision of adequate personal protective equipment was a factor that would encourage them to work during any future outbreak. The participants wanted to go on a trip after the outbreak was over. @*Conclusion@#Our findings indicate that the COVID-19 outbreak had a significant emotional impact on HCWs. The concerns of HCWs may affect their work efficiency in an outbreak and should be addressed by incorporating appropriate management strategies while planning to combat an outbreak.

13.
Journal of Genetic Medicine ; : 60-63, 2021.
Article in English | WPRIM | ID: wpr-891623

ABSTRACT

Gabriel–de Vries syndrome, caused by the mutation of YY1, is a newly defined genetic syndrome characterized by developmental delay, facial dysmorphism, and intrauterine growth retardation. A 7-month-old girl presented developmental delay and subtle facial dysmorphism including facial asymmetry, micrognathia, and low-set ears. Whole exome sequencing identified a de novo heterozygous missense variant in the YY1 (c.1220A>G; p.His407Arg) gene. Here, we examined the clinical and genetic characteristics of an infant with a novel likely pathogenic variant of YY1. This case expands the phenotypic spectrum of Gabriel–de Vries syndrome.

14.
Neonatal Medicine ; : 57-64, 2020.
Article | WPRIM | ID: wpr-837018

ABSTRACT

Purpose@#Inhaled nitric oxide (iNO) is a potent selective pulmonary vasodilator and an important treatment for newborn infants with hypoxic respiratory failure due to persistent pulmonary hypertension of the newborn (PPHN). The Ministry of Food and Drug Safety of Korea first approved iNO in 2009 for use as a new drug to treat hypoxic res piratory failure with PPHN. A post-marketing surveillance study (PMSS) was conducted to assess the effectiveness and safety of the iNO treatment. We evaluated the clinical status of the iNO treatment currently available in Korea by using the PMSS data. @*Methods@#We retrospectively reviewed the PMSS data from 22 hospitals in Korea from October 2014 to September 2018. Altogether, 97 infants were enrolled and divided into early response (ER), delayed response (DR), no response (NR), and death groups according to their response to the iNO treatment. @*Results@#The ER group included 52 infants (53.6%); DR group, 33 (34.0%); NR group, seven (7.2%); and death group, five (5.2%). The iNO treatment was initiated within 14 days after birth at a concentration of 20 ppm. The median treatment duration was 91.5 hours (69.0 to 134.3) in all the infants. Of the infants, 43 (44.3%) received the treatment for >96 hours. Fifty-one infants (52.6%) needed >20 ppm of iNO, and 10 (10.5%) needed a maximum of 80 ppm of iNO. None of the infants had hypermethemoglobinemia or an alarm report of NO2. @*Conclusion@#Korean neonatologists reported that a large proportion of the infants with PPHN showed improvement in oxygenation after treatment with the approved iNO. These infants received relatively longer durations and higher concentrations of the iNO treatment than the current recommendations, without any side and adverse effect.

15.
Laboratory Medicine Online ; : 197-201, 2020.
Article | WPRIM | ID: wpr-836925

ABSTRACT

Background@#IgD is an immunoglobulin isotype that accounts for 100 mg/L. The established upper limit of the reference interval was 53.6 mg/L. @*Conclusions@#The SPAPLUS shows good analytical performance for serum IgD quantification.

16.
Journal of the Korean Society of Emergency Medicine ; : 305-314, 2020.
Article | WPRIM | ID: wpr-834921

ABSTRACT

Objective@#This study evaluated the usefulness, as a risk factor of 30-day mortality, in patients residing in nursing-homes (NHs) or long-term care facilities with the diagnosis of pneumonia. @*Methods@#We conducted a retrospective study in a public hospital between January 2017 and December 2017. The subjects included elderly patients residing in NHs and diagnosed with pneumonia in the emergency room. Data on age, gender, comorbidities, laboratory findings, pneumonia severity index score (PSI), and CURB-65 (Confusion, Urea, Respiratory rate, Blood pressure, and Age 65 or older) were entered into an electronic database. @*Results@#A total of 439 patients were enrolled during the study period. The mean age was 82.1±8.0 years; 195 (44.4%) were men, and 30-day mortality was 21.8%. On multivariate Cox proportional hazard analysis, cerebrovascular accidents (hazard ratio [HR], 0.53; 95% confidence interval [CI], 0.33-0.87; P=0.012), chronic renal disease (HR, 2.28; 95% CI, 1.11-4.67; P=0.024), malignancy (HR, 1.69; 95% CI, 1.04-2.76; P=0.034), lactate (HR, 1.02; 95% CI, 1.01-1.03; P<0.001), albumin (HR, 0.52; 95% CI, 0.36-0.73; P<0.001), and red cell distribution width (RDW; HR, 1.11; 95% CI, 1.03- 1.19; P=0.007) were independently associated with 30-day mortality. Areas under the curve of PSI, RDW, albumin, lactate, and PSI+RDW+albumin+lactate were 0.690 (95% CI, 0.629-0.751), 0.721 (95% CI, 0.666-0.775), 0.668 (95% CI, 0.607-0.728), 0.661 (95% CI, 0.597-0.726), and 0.801 (95% CI, 0.750-0.852), respectively. @*Conclusion@#RDW, albumin, lactate and especially the combination of PSI and these factors appear to be major determinants of 30-day mortality in NH residents with pneumonia.

17.
Journal of the Korean Society of Emergency Medicine ; : 330-338, 2020.
Article | WPRIM | ID: wpr-834918

ABSTRACT

Objective@#This study described the effectiveness of the one-stop treat system (OTS) and the improvements characterizing the patients who come to an emergency medical center via the one-stop treat system for heavily drunken people @*Methods@#An observational retrospective study was conducted on patients, aged 19 years or older, who visited the emergency department (ED) from January 2014 to December 2017 with alcohol intoxication (AI). The subjects were divided into two groups, that is, AI patients who come to ED directly or those who came via OTS. We compared and analyzed the characteristics of two groups including gender, age, date, mode of the ED visit, level of consciousness, diagnosis, ED length of stay (LOS), hospital LOS, and final outcomes. @*Results@#A total of 8,144 patients were enrolled in the study. There were 2,221 AI patients who visited ED directly and 5,923 AI patients who visited ED via OTS. Patients arriving via OTS had more medical or surgical problems than the patients who came directly from the ED. Discharged patients via OTS showed a longer ED LOS (312 minutes [range, 169-520 minutes], P<0.001). Compared with patients who came directly from ED, the patients via OTS showed a higher admission rate (10.7% vs. 3.4%, respectively; P<0.001), and a higher death rate in ED (0.6% vs. 0%, respectively; P<0.001). @*Conclusion@#Compared the characteristics of the patients from ED directly in 2014-2017, the patients via OTS had higher severity and admission rate, and a longer ED LOS. Our findings suggest that we should pay attention to patients via OTS because the patients have high severity of illness.

18.
International Neurourology Journal ; : S48-55, 2020.
Article | WPRIM | ID: wpr-834357

ABSTRACT

Purpose@#Cognitive impairment is one of the main symptoms of Alzheimer disease and other dementias. Glycyrrhiza uralensis is a natural product that has a protective effect against cognitive impairment. In this study, we investigated whether glycyrrhizic acid, among the main bioactive components of Glycyrrhiza uralensis, has a neuroprotective effect on scopolamine-induced cognitive impairment. @*Methods@#Twenty-week-old male Institute of Cancer Research mice were used in this study. The scopolamine-induced cognitive impairment mice model was used. Glycyrrhizic acid was orally administered to mice once daily for 21 days, while scopolamine (1 mg/kg) treatment was delivered 30 minutes before behavioral tests. Donepezil (2 mg/kg) was used as a positive drug control. To evaluate the effect of glycyrrhizic acid, the following assessments were performed on hippocampal tissue: Y-maze test, acetylcholinesterase activity, antioxidant enzymes’ activity (superoxide dismutase, catalase). Western blotting for phosphor-extracellular signal-regulated kinase, P38, and c-Jun NH2-terminal kinase was conducted. @*Results@#We found that glycyrrhizic acid administration significantly improved scopolamine-induced cognitive impairment in the Y-maze test. The acetylcholinesterase activity, superoxide dismutase, and catalase activity in the glycyrrhizic acid-treated group showed a significant reversal of cognitive impairment compared with the scopolamine-treated group. @*Conclusions@#Our results suggest that glycyrrhizic acid has a neuroprotective effect on cognitive function in scopolamine-induced cognitive impairment.

20.
Neonatal Medicine ; : 151-158, 2020.
Article in English | WPRIM | ID: wpr-902812

ABSTRACT

Purpose@#As preterm infants have shown advances in survival rate, many very-lowbirth-weight (VLBW) infants have shown developmental delay even without a major brain injury. Thus, the incidence of and risk factors associated with poor neurodevelopmental outcome should be evaluated. @*Methods@#A multicenter nationwide prospective longitudinal cohort study of VLBW infants born in South Korea between 2013 and 2015 was conducted. Poor neurodevelopmental outcome was diagnosed if the Bayley Scales of Infant and Toddler Development (BSID)-III composite score was ≤85 (cognition, language, motor). We analyzed the associations of baseline neonatal characteristics, environmental characteristics and neonatal morbidities with poor neurodevelopmental outcome. @*Results@#The study included 285 infants, of whom 34 (11.9%) exhibited cognition delay; 59 (20.7%), showed language delay and 32 (11.2%) showed motor delay. The mean gestational age and birth weight were 29 weeks and 1,130 g, respectively. Moderate and severe bronchopulmonary dysplasia (P=0.056) and intraventricular hemorrhage grade I (P=0.079) were marginally associated with cognition delay. Higher paternal educational level (P<0.05) was significantly associated with the language outcome. Birth weight (P<0.05) and head circumference at discharge (P<0.05) were the major predictors of motor delay. @*Conclusion@#The population-based nationwide cohort study shows that approximately 20% of VLBW infants without major brain injury have developmental delay. Several factors that are not directly associated with major brain injury were significantly associated with poor neurodevelopmental outcome.

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