1.A Novel Acremonium Species Isolated from Air Samples in Korea
Jung-Min LEE ; Jae-Eui CHA ; Young-Sil YOON ; Ahn-Heum EOM
Mycobiology 2023;51(4):210-215
The aim of this study was to characterize a new fungal species, Acremonium conglutinatum, isolated from air samples collected in Wando, South Korea. Phylogenetic analysis based on the internal transcribed spacer and large subunit regions revealed its unique position within the genus Acremonium. The isolated strain displayed distinct morphological characteristics, including ellipsoid or bent-ellipsoid conidia formed in clusters on the phialides. These features differentiate the new species from closely related species within the genus. This study describes the morphological and molecular characteristics of A. conglutinatum and emphasizes its phylogenetic relationships with other Acremonium spp. The identification of this novel species contributes to our understanding of the diversity and ecological role of Acremonium.
2.Links between Thyroid Disorders and Glucose Homeostasis
Young Sil EOM ; Jessica R. WILSON ; Victor J. BERNET
Diabetes & Metabolism Journal 2022;46(2):239-256
Thyroid disorders and diabetes mellitus often coexist and are closely related. Several studies have shown a higher prevalence of thyroid disorders in patients with diabetes mellitus and vice versa. Thyroid hormone affects glucose homeostasis by impacting pancreatic β-cell development and glucose metabolism through several organs such as the liver, gastrointestinal tract, pancreas, adipose tissue, skeletal muscles, and the central nervous system. The present review discusses the effect of thyroid hormone on glucose homeostasis. We also review the relationship between thyroid disease and diabetes mellitus: type 1, type 2, and gestational diabetes, as well as guidelines for screening thyroid function with each disorder. Finally, we provide an overview of the effects of antidiabetic drugs on thyroid hormone and thyroid disorders.
3.A Position Statement of the Utilization and Support Status of Continuous Glucose Monitoring in Korea
Won Jun KIM ; Jae Hyun KIM ; Hye Jin YOO ; Jang Won SON ; Ah Reum KHANG ; Su Kyoung KWON ; Ji Hye KIM ; Tae Ho KIM ; Ohk Hyun RYU ; Kyeong Hye PARK ; Sun Ok SONG ; Kang-Woo LEE ; Woo Je LEE ; Jung Hwa JUNG ; Ho-Chan CHO ; Min Jeong GU ; Jeongrim LEE ; Dal Lae JU ; Yeon Hee LEE ; Eun Kyung KIM ; Young Sil EOM ; Sung Hoon YU ; Chong Hwa KIM ;
Journal of Korean Diabetes 2021;22(4):225-237
The accuracy and convenience of continuous glucose monitoring (CGM), which efficiently evaluates glycemic variability and hypoglycemia, are improving. There are two types of CGM: professional CGM and personal CGM. Personal CGM is subdivided into real-time CGM (rt-CGM) and intermittently scanned CGM (isCGM). CGM is being emphasized in both domestic and foreign diabetes management guidelines. Regardless of age or type of diabetes, CGM is useful for diabetic patients undergoing multiple insulin injection therapy or using an insulin pump. rt-CGM is recommended for all adults with type 1 diabetes (T1D), and can also be used in type 2 diabetes (T2D) treatments using multiple insulin injections. In some cases, short-term or intermittent use of CGM may be helpful for patients with T2D who use insulin therapy other than multiple insulin injections and/or oral hypoglycemic agents. CGM can help to achieve A1C targets in diabetes patients during pregnancy. CGM is a safe and cost-effective alternative to self-monitoring blood glucose in T1D and some T2D patients. CGM used in diabetes management works optimally with proper education, training, and follow up. To achieve the activation of CGM and its associated benefits, it is necessary to secure sufficient repetitive training and time for data analysis, management, and education. Various supports such as compensation, insurance coverage expansion, and reimbursement are required to increase the effectiveness of CGM while considering the scale of benefit recipients, policy priorities, and financial requirements.
4.Notch1 Has an Important Role in β-Cell Mass Determination and Development of Diabetes
Young Sil EOM ; A-Ryeong GWON ; Kyung Min KWAK ; Jin-Young YOUN ; Heekyoung PARK ; Kwang-Won KIM ; Byung-Joon KIM
Diabetes & Metabolism Journal 2021;45(1):86-96
Notch signaling pathway plays an important role in regulating pancreatic endocrine and exocrine cell fate during pancreas development. Notch signaling is also expressed in adult pancreas. There are few studies on the effect of Notch on adult pancreas. Here, we investigated the role of Notch in islet mass and glucose homeostasis in adult pancreas using Notch1 antisense transgenic (NAS). Western blot analysis was performed for the liver of 8-week-old male NAS mice. We also conducted an intraperitoneal glucose tolerance test (IPGTT) and intraperitoneal insulin tolerance test in 8-week-old male NAS mice and male C57BL/6 mice (control). Morphologic observation of pancreatic islet and β-cell was conducted in two groups. Insulin secretion capacity in islets was measured by glucose-stimulated insulin secretion (GSIS) and perifusion. NAS mice showed higher glucose levels and lower insulin secretion in IPGTT than the control mice. There was no significant difference in insulin resistance. Total islet and β-cell masses were decreased in NAS mice. The number of large islets (≥250 µm) decreased while that of small islets (<250 µm) increased. Reduced insulin secretion was observed in GSIS and perifusion. Neurogenin3, neurogenic differentiation, and MAF bZIP transcription factor A levels increased in NAS mice. Our study provides that Notch1 inhibition decreased insulin secretion and decreased islet and β-cell masses. It is thought that Notch1 inhibition suppresses islet proliferation and induces differentiation of small islets. In conclusion, Notch signaling pathway may play an important role in β-cell mass determination and diabetes.
5.Lead, Mercury, and Cadmium Exposure in the Korean General Population
Sang Yong EOM ; Young Sub LEE ; Seul Gi LEE ; Mi Na SEO ; Byung Sun CHOI ; Yong Dae KIM ; Ji Ae LIM ; Myung Sil HWANG ; Ho Jang KWON ; Yu Mi KIM ; Young Seoub HONG ; Seok Joon SOHN ; Kyung Su PARK ; Hee Soo PYO ; Ho KIM ; Heon KIM ; Jung Duck PARK
Journal of Korean Medical Science 2018;33(2):e9-
BACKGROUND: Lead (Pb), mercury (Hg), and cadmium (Cd) are well-known environmental pollutants. They are unnecessary in the biological processes of humans. This study was performed to estimate the representative background exposure levels to the metals by measuring concentrations in whole blood of the Korean general population. METHODS: This population-based cross-sectional study included 4,000 subjects (1,886 males and 2,114 females) 0–83 years of age in 2010 and 2011. Adult subjects (≥ 19 years of age) were collected by sex- and age-stratified probability method, and preschool- and school-aged subjects were recruited by a cluster sampling method. Written consent was provided prior to blood sampling. Pb and Cd blood concentrations were determined by a flameless atomic absorption spectrophotometry, and blood Hg was analyzed by a direct Hg analyzer. RESULTS: The geometric mean, median and 95th percentile of blood Pb was 1.82 µg/dL, 1.83 µg/dL, and 3.78 µg/dL, respectively. The respective values were 2.92 µg/L, 2.87 µg/L, 9.12 µg/L for Hg, and 0.56 µg/L, 0.59 µg/L, 2.20 µg/L for Cd. Blood Pb and Hg were higher in males than in females, but no sex difference was observed, respectively, in subjects 0–4 years of age for Pb and in subjects less than 20 years for Hg. However, blood Cd was higher in females than in males and no sex difference was observed in subjects < 30 years of age. CONCLUSION: This study provides representative data of human exposure to Pb, Hg, and Cd covering whole age groups of the general population in Korea.
Adult
;
Biological Processes
;
Cadmium
;
Cross-Sectional Studies
;
Environmental Pollutants
;
Female
;
Humans
;
Korea
;
Male
;
Metals
;
Methods
;
Sex Characteristics
;
Spectrophotometry, Atomic
6.The Well-Being and Treatment Satisfaction of Diabetic Patients in an Outpatient Setting at a General Hospital in Korea.
Hwa Sun PARK ; Sin Na LEE ; Min Young BAEK ; Seung Hee YU ; Young Sil EOM ; Sihoon LEE ; Ki Young LEE ; Yeun Sun KIM ; Byung Joon KIM ; Kwang Won KIM ; Ie Byung PARK
Journal of Korean Diabetes 2016;17(2):123-133
BACKGROUND: The aim of this study was to assess the psychological well-being and treatment satisfaction in patients with type 2 diabetes mellitus in a general hospital in Korea. METHODS: This study included 440 type 2 diabetes patients above 20 years of age. Well-Being Questionnaire-12 (WBQ-12) and Diabetes Treatment Satisfaction Questionnaire were used to survey well-being and treatment satisfaction, respectively. WBQ-12 consists of 4 categories: negative well-being (NWB), energy (ENE), positive well-being (PWB), and general well-being (GWB). RESULTS: There were significant associations between NWB scores and women, low education, low-income, and number of hospital admissions. Significant associations were also identified between ENE scores and men, higher education, insulin nonusers, high-income, compliance with recommended exercise, number of medications, satisfaction with treatment time, and poor glycemic control. PWB scores were significantly associated with high-income, satisfaction with waiting and treatment times, compliance with recommended diet and exercise, and number of medications. GWB scores were significantly associated with men, higher education, high-income, satisfaction with waiting and treatment times, compliance with recommended exercise, and number of medications. Treatment satisfaction was significantly associated with age, satisfaction with waiting and treatment times, compliance with recommended diet and exercise, and duration of diabetes. CONCLUSION: Diabetes care requires psychosocial support in addition to medical care. Unlike Western studies, our study found that satisfaction with waiting and treatment times had a strong correlation with well-being and treatment satisfaction in diabetes patients.
Compliance
;
Diabetes Mellitus, Type 2
;
Diet
;
Education
;
Female
;
Hospitals, General*
;
Humans
;
Insulin
;
Korea*
;
Male
;
Morinda
;
Outpatients*
7.A Rare Case of Bleeding Ectopic Lingual Thyroid Presenting as Hematemesis.
Min Kwan BAEK ; Eun Young KIM ; Soong Gong LEE ; Sang Min LEE ; Young Sil EOM
Yonsei Medical Journal 2015;56(4):1163-1164
No abstract available.
8.Genetic Analysis of Multiple Endocrine Neoplasia Type 1 (MEN1) Leads to Misdiagnosis of an Extremely Rare Presentation of Intrasellar Cavernous Hemangioma as MEN1.
Dong Min LEE ; Seung Hee YU ; Hyun Hwa YOON ; Kang Lock LEE ; Young Sil EOM ; Kiyoung LEE ; Byung Joon KIM ; Yeun Sun KIM ; Ie Byung PARK ; Kwang Won KIM ; Sihoon LEE
Endocrinology and Metabolism 2014;29(2):146-153
BACKGROUND: Multiple endocrine neoplasia type 1 (MEN1) is a rare inherited disorder characterized by the simultaneous occurrence of endocrine tumors in target tissues (mainly the pituitary, endocrine pancreas, and parathyroid glands). MEN1 is caused by mutations in the MEN1 gene, which functions as a tumor suppressor and consists of one untranslated exon and nine exons encoding the menin protein. This condition is usually suspected when we encounter patients diagnosed with tumors in multiple endocrine organs, as mentioned above. METHODS: A 65-year-old woman who underwent surgery for a pancreatic tumor (serous cystadenoma) 5 years previously was referred to our hospital due to neurologic symptoms of diplopia and left ptosis. Brain magnetic resonance imaging revealed a 3.4-cm lesion originating from the cavernous sinus wall and extending into the sellar region. It was thought to be a nonfunctioning tumor from the results of the combined pituitary function test. Incidentally, we found that she also had a pancreatic tumor, indicating the necessity of genetic analysis for MEN1. RESULTS: Genomic analysis using peripheral leukocytes revealed a heterozygous c.1621G>A mutation in the MEN1 gene that was previously reported to be either a pathogenic mutation or a simple polymorphism. We pursued a stereotactic approach to the pituitary lesion, and microscopic findings of the tumor revealed it to be an intrasellar cavernous hemangioma, a rare finding in the sellar region and even rarer in relation to oculomotor palsy. The patient recovered well from surgery, but refused further evaluation for the pancreatic lesion. CONCLUSION: There is great emphasis placed on genetic testing in the diagnosis of MEN1, but herein we report a case where it did not assist in diagnosis, hence, further discussion on the role of genetic testing in this disease is needed. Also, in cases of pituitary tumor with cranial nerve palsy, despite its low prevalence, intrasellar cavernous hemangioma could be suspected.
Aged
;
Brain
;
Cavernous Sinus
;
Cranial Nerve Diseases
;
Diagnosis
;
Diagnostic Errors*
;
Diplopia
;
Exons
;
Female
;
Genetic Testing
;
Hemangioma, Cavernous*
;
Humans
;
Islets of Langerhans
;
Leukocytes
;
Magnetic Resonance Imaging
;
Multiple Endocrine Neoplasia Type 1*
;
Neurologic Manifestations
;
Paralysis
;
Pituitary Function Tests
;
Pituitary Neoplasms
;
Prevalence
9.Articulation error of children with adenoid hypertrophy.
Tae Hoon EOM ; Eun Sil JANG ; Young Hoon KIM ; Seung Yun CHUNG ; In Goo LEE
Korean Journal of Pediatrics 2014;57(7):323-328
PURPOSE: Adenoid hypertrophy is a physical alteration that may affect speech, and a speech disorder can have other negative effects on a child's life. Airway obstruction leads to constricted oral breathing and causes postural alterations of several oro-facial structures, including the mouth, tongue, and hyoid bone. The postural modifications may affect several aspects of speech production. METHODS: In this study, we compared articulation errors in 19 children with adenoid hypertrophy (subject group) to those of 33 children with functional articulation disorders independent of anatomical problems (control group). RESULTS: The mean age of the subject group was significantly higher (P=0.016). Substitution was more frequent in the subject group (P=0.003; odds ratio [OR], 1.80; 95% confidence interval [CI], 1.23-2.62), while omission was less frequent (P<0.001; OR, 0.43; 95% CI, 0.27-0.67). Articulation errors were significantly less frequent in the palatal affricative in the subject group (P=0.047; OR, 0.25; 95% CI, 0.07-0.92). The number of articulation errors in other consonants was not different between the two groups. Nasalization and aspiration were significantly more frequent in the subject group (P=0.007 and 0.014; OR, 14.77 and 0.014; 95% CI, [1.62-135.04] and NA, respectively). Otherwise, there were no differences between the two groups. CONCLUSION: We identified the characteristics of articulation errors in children with adenoid hypertrophy, but our data did not show the relationship between adenoid hypertrophy and oral motor function that has been observed in previous studies. The association between adenoid hypertrophy and oral motor function remains doubtful.
Adenoids*
;
Airway Obstruction
;
Articulation Disorders
;
Child*
;
Humans
;
Hyoid Bone
;
Hypertrophy*
;
Mouth
;
Mouth Breathing
;
Odds Ratio
;
Respiration
;
Tongue
10.Glucagon-Like Peptide-1 (GLP-1) Agonist.
Young Sil EOM ; Byung Joon KIM
Korean Journal of Medicine 2014;87(1):9-13
The prevalence of diabetes is increasing worldwide. Glycemic control has been shown to prevent microvascular complications. Many oral hyperglycemic drugs and insulin are being used in the treatment of diabetes, but the effects of those treatments are suboptimal. The two incretin hormones GLP-1 and GIP are released from L- and K-cells, respectively, in response to nutrient intake. GLP-1 stimulates glucose-dependent insulin release. Recently, incretin hormone-based therapies, including GLP-1 agonists and DPP-4 inhibitors, have been used as new treatment options to control glucose levels in patients with type 2 diabetes mellitus. The purpose of this article is to review the efficacy and safety of GLP-1 agonists in the treatment of type 2 diabetes.
Diabetes Mellitus, Type 2
;
Glucagon-Like Peptide 1*
;
Glucose
;
Humans
;
Incretins
;
Insulin
;
Prevalence

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