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대한내과학회> The Korean Journal of Internal Medicine> Current status of the diagnosis of chronic pancreatitis by ultrasonographic elastography

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Current status of the diagnosis of chronic pancreatitis by ultrasonographic elastography

Kazunori Nakaoka , Senju Hashimoto , Ryoji Miyahara , Hiroki Kawashima , Eizaburo Ohno , Takuya Ishikawa , Takamichi Kuwahara , Hiroyuki Tanaka , Yoshiki Hirooka
  • : 대한내과학회
  • : The Korean Journal of Internal Medicine 37권1호
  • : 연속간행물
  • : 2022년 01월
  • : 27-36(10pages)
The Korean Journal of Internal Medicine

DOI


목차

INTRODUCTION
TYPES OF ELASTOGRAPHY
METHODS OF ELASTOGRAPHY
THE USEFULNESS OF ULTRASONOGRAPHY/ EUS ELASTOGRAPHY IN PANCREATIC DISEASE
UTILITY OF ELASTOGRAPHY WITH EUS SHEAR WAVE MEASUREMENT IN PANCREATIC DISEASE
DIAGNOSIS OF CP WITH TRANSABDOMINAL ULTRASONOGRAPHY
CHANGES IN THE PANCREAS WITH AGING
Conflict of interest
REFERENCES

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Chronic pancreatitis (CP) is pathologically characterized by the loss of exocrine pancreatic parenchyma, irregular fibrosis, cellular infiltration, and ductal abnormalities. Diagnosing CP objectively is difficult because standard diagnostic criteria are insufficient. The change of parenchymal hardness is the key factor for the diagnosis and understanding of the severity of CP. The ultrasonography (US) or endoscopic ultrasonography (EUS) elastography have been used to diagnose pancreatic diseases. Both strain elastography (SE) and shear wave elastography are specific diagnostic techniques for measuring tissue hardness. Most previous studies were conducted with SE. There are three methods of interpreting SE; the method of recognizing the patterns in SE distribution images in the region of interest, the method of using strain ratio to compare the hardness of adipose tissue or connective tissue with that of the lesion, and the method of evaluating the hardness distribution of a target by histogram analysis. These former two methods have been used primarily for neoplastic diseases, and histograms analysis has been used to assess hardness distribution in the evaluation of CP. Since the hardness of the pancreas increases with aging, it is necessary to consider the age in the diagnosis of pancreatic disorders using US or EUS elastography.

UCI(KEPA)

I410-ECN-0102-2022-500-000948786

간행물정보

  • : 의약학분야  > 내과학
  • : KCI등재
  • : SCOPUS
  • : 격월
  • : 1226-3303
  • : 2005-6648
  • : 학술지
  • : 연속간행물
  • : 1986-2022
  • : 2705


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1Emotional and cognitive changes in chronic kidney disease

저자 : Duk-soo Kim , Seong-wook Kim , Hyo-wook Gil

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 489-501 (13 pages)

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Chronic kidney disease (CKD) leads to cognitive impairment and emotional changes. However, the precise mechanism underlying the crosstalk between the kidneys and the nervous system is not fully understood. Inflammation and cerebrovascular disease can influence the development of depression in CKD. CKD is one of the strongest risk factors for cognitive impairment. Moreover, cognitive impairment occurs in CKD as patients experience the dysregulation of several brain functional domains due to damage caused to multiple cortical regions and to subcortical modulatory neurons. The differences in structural brain changes between CKD and non-CKD dementia may be attributable to the different mechanisms that occur in CKD. The kidney and brain have similar anatomical vascular systems, which may be susceptible to traditional risk factors. Vascular factors are assumed to be involved in the development of cognitive impairment in patients with CKD. Vascular injury induces white matter lesions, silent infarction, and microbleeds. Uremic toxins may also be directly related to cognitive impairment in CKD. Many uremic toxins, such as indoxyl sulfate, are likely to have an impact on the central nervous system. Further studies are required to identify therapeutic targets to prevent changes in the brain in patients with CKD.

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2Glomerular filtration rate as a kidney outcome of diabetic kidney disease: a focus on new antidiabetic drugs

저자 : Hyo Jin Kim , Sang Soo Kim , Sang Heon Song

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 502-519 (18 pages)

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Diabetes has reached epidemic proportions, both in Korea and worldwide and is associated with an increased risk of chronic kidney disease and kidney failure (KF). The natural course of kidney function among people with diabetes (especially type 2 diabetes) may be complex in real-world situations. Strong evidence from observational data and clinical trials has demonstrated a consistent association between decreased estimated glomerular filtration rate (eGFR) and subsequent development of hard renal endpoints (such as KF or renal death). The disadvantage of hard renal endpoints is that they require a long follow-up duration. In addition, there are many patients with diabetes whose renal function declines without the appearance of albuminuria, measurement of the eGFR is emphasized. Many studies have used GFR-related parameters, such as its change, decline, or slope, as clinical endpoints for kidney disease progression. In this respect, understanding the trends in GFR changes could be crucial for developing clinical management strategies for the prevention of diabetic complications. This review focuses on the clinical implication of the eGFR-related parameters that have been used so far in diabetic kidney disease. We also discuss the use of recently developed new antidiabetic drugs for kidney protection, with a focus on the GFR as clinical endpoints.

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3Omics-based biomarkers for diagnosis and prediction of kidney allograft rejection

저자 : Jeong-hoon Lim , Byung Ha Chung , Sang-ho Lee , Hee-yeon Jung , Ji-young Choi , Jang-hee Cho , Sun-hee Park , Yong-lim Kim , Chan-duck Kim

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 520-533 (14 pages)

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Kidney transplantation is the preferred treatment for patients with end-stage kidney disease, because it prolongs survival and improves quality of life. Allograft biopsy is the gold standard for diagnosing allograft rejection. However, it is invasive and reactive, and continuous monitoring is unrealistic. Various biomarkers for diagnosing allograft rejection have been developed over the last two decades based on omics technologies to overcome these limitations. Omics technologies are based on a holistic view of the molecules that constitute an individual. They include genomics, transcriptomics, proteomics, and metabolomics. The omics approach has dramatically accelerated biomarker discovery and enhanced our understanding of multifactorial biological processes in the field of transplantation. However, clinical application of omics-based biomarkers is limited by several issues. First, no large-scale prospective randomized controlled trial has been conducted to compare omics-based biomarkers with traditional biomarkers for rejection. Second, given the variety and complexity of injuries that a kidney allograft may experience, it is likely that no single omics approach will suffice to predict rejection or outcome. Therefore, integrated methods using multiomics technologies are needed. Herein, we introduce omics technologies and review the latest literature on omics biomarkers predictive of allograft rejection in kidney transplant recipients.

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4Role of T cells in ischemic acute kidney injury and repair

저자 : Kyungho Lee , Hye Ryoun Jang

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 534-550 (17 pages)

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Ischemic acute kidney injury (AKI) is a common medical problem with significant mortality and morbidity, affecting a large number of patients globally. Ischemic AKI is associated with intrarenal inflammation as well as systemic inflammation; thus, the innate and adaptive immune systems are implicated in the pathogenesis of ischemic AKI. Among various intrarenal immune cells, T cells play major roles in the injury process and in the repair mechanism affecting AKI to chronic kidney disease transition. Importantly, T cells also participate in distant organ crosstalk during AKI, which affects the overall outcomes. Therefore, targeting T cell-mediated pathways and T cell-based therapies have therapeutic promise for ischemic AKI. Here, we review the major populations of kidney T cells and their roles in ischemic AKI.

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5Changes in practice for mechanically ventilated patients: effect of the pain, agitation, and delirium guidelines

저자 : Jin Won Huh

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 553-554 (2 pages)

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6Safety of direct oral anticoagulants compared to warfarin in cirrhotic patients with atrial fibrillation

저자 : Seo Yeon Yoo , Eunju Kim , Gi-byoung Nam , Danbi Lee , Ju Hyun Shim , Kang Mo Kim , Young-suk Lim , Han Chu Lee , Young-hwa Chung , Yung Sang Lee , Jonggi Choi

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 555-566 (12 pages)

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Background/Aims: The safety of direct oral anticoagulants (DOACs) compared with warfarin in patients with both nonvalvular atrial fibrillation (AF) and clinically confirmed liver cirrhosis (LC) has not been well studied. We compared the risk of a major bleeding event between DOAC and warfarin treatments in this patient population.
Methods: A total of 238 cirrhotic patients with AF were retrospectively analyzed. The major bleeding event risk was compared between DOAC- and warfarin-treated groups. The median follow-up duration was 5.6 years.
Results: Among the 238 study patients with LC and AF, 128 (53.8%) received DOACs and 110 (46.2%) received warfarin. The mean patient age was 68.8 years, and 78.2% were men. A major bleeding event occurred in 10 and 20 patients in the DOAC and warfarin groups, respectively, most commonly caused by gastrointestinal bleeding (70.0%). The cumulative risk of major bleeding did not differ between the groups by log-rank test (p = 0.12). This finding did not change when using 60 propensity score-matched pairs. A multivariable Cox regression model indicated that the concomitant use of antiplatelet agents (adjusted hazard ratio [aHR], 2.06; 95% confidence interval [CI], 1.00 to 4.30; p = 0.048) and presence of esophageal or gastric varices confirmed by endoscopic examination (aHR, 2.31; 95% CI, 1.03 to 5.17; p = 0.04) were associated with major bleeding in the entire cohort.
Conclusions: A major bleeding event risk is not increased by DOAC compared with warfarin treatment. Antiplatelet agent use and varices are independently associated with a higher risk of major bleeding during anticoagulation.

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7Radiology plus ileocolonoscopy versus radiology alone in Crohn's disease: prognosis prediction and mutual agreement

저자 : Hye Kyung Hyun , Jongwook Yu , Eun Ae Kang , Jihye Park , Soo Jung Park , Jae Jun Park , Tae Il Kim , Won Ho Kim , Jae Hee Cheon

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 567-579 (13 pages)

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Background/Aims: The optimal tools for monitoring Crohn's disease (CD) are controversial. We compared radiology plus ileocolonoscopy and radiology alone in terms of prognosis prediction and evaluated the agreement between radiologic and ileocolonoscopic findings in patients with CD.
Methods: Patients with CD who were followed up with computed tomography enterography (CTE) or magnetic resonance enterography (MRE) alone or CTE or MRE plus ileocolonoscopy were retrospectively recruited. Time to relapse was investigated to evaluate the difference in prognosis using the log-rank and Cox regression tests, and the agreement between radiologic and ileocolonoscopic findings was determined using a kappa value.
Results: A total of 501 patients with CD in clinical remission who underwent CTE or MRE and/or ileocolonoscopy were analyzed. Of these, 372 (74.3%) patients underwent CTE or MRE alone and 129 (25.7%) patients underwent CTE or MRE plus ileocolonoscopy. The cumulative maintenance rate of clinical remission between the two groups was not significantly different (p = 0.526, log-rank test). In multivariate analysis, age <40 years (hazard ratio [HR], 2.756; 95% confidence interval [CI], 1.263 to 6.013) and a history of steroid use (HR, 2.212; 95% CI, 1.258 to 3.577) were found to independently predict an increased risk for clinical relapse in patients with CD in clinical remission. Radiologic and ileocolonoscopic findings had a moderate degree of agreement (κ = 0.401, -0.094 to 0.142). The comparison of agreement between radiologic and ileocolonoscopic findings was the highest in the anastomotic site (κ = 0.749, -0.168 to 0.377).
Conclusions: Radiology plus ileocolonoscopy was not superior to radiology alone in predicting the prognosis of CD.

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8Is radiological healing alone enough? 'Can't take my eyes off' the mucosa

저자 : Su Hyun Park , Sang Hyoung Park

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 567-568 (2 pages)

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9Long-term effect of the eradication of Helicobacter pylori on the hemoglobin A1c in type 2 diabetes or prediabetes patients

저자 : Won Seok Kim , Yonghoon Choi , Nayoung Kim , Seon Hee Lim , Gitark Noh , Ki Wook Kim , Jaehyung Park , Hyeongho Jo , Hyuk Yoon , Cheol Min Shin , Young Soo Park , Dong Ho Lee

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 579-596 (18 pages)

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Background/Aims: The long-term effect of Helicobacter pylori eradication on the metabolic syndrome or diabetes are unclear. The aim of this study was to evaluate the effect of H. pylori eradication on glycemic control in type 2 diabetes mellitus (T2DM) or prediabetes mellitus (preDM).
Methods: A total of 124 asymptomatic subjects with T2DM or preDM were divided into H. pylori-negative (n = 40), H. pylori-positive with non-eradicated (n = 34), and eradicated (n = 50) groups. We measured H. pylori status (culture, histology, and rapid urease test) and glycated hemoglobin A1c (A1C) levels and followed-up at the 1st year and the 5th year of follow-up.
Results: The A1C levels significantly decreased in the eradicated group compared to the negative group and the non-eradicated groups (at the 1st year, p = 0.024; at the 5th year, p = 0.009). The A1C levels decreased in male, and/or subjects < 65 years of age in subgroup analyses (in male subjects, p = 0.047 and p = 0.020 at the 1st and the 5th year; in subjects < 65 years of age, p = 0.028 and p = 0.006 at the 1st and the 5th year; in male subjects < 65 years of age, p = 0.039 and p = 0.032 at the 1st and the 5th year). The eradication of H. pylori was related to the decrease in A1C values throughout the follow-up period, compared to the non-eradicated group (p = 0.017).
Conclusions: H. pylori eradication was related to the decreasing of A1C levels in patients with T2DM or preDM over a long-term follow-up period, especially in male and subjects < 65 years of age.

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10Off-hour presentation and outcomes for percutaneous coronary intervention in acute myocardial infarction with Killip Ⅲ-Ⅳ

저자 : Seok Oh , Ju Han Kim , Kyung Hoon Cho , Min Chul Kim , Doo Sun Sim , Young Joon Hong , Youngkeun Ahn , Myung Ho Jeong

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 3호 발행 연도 : 2022 페이지 : pp. 591-610 (20 pages)

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Background/Aims: Acute myocardial infarction (AMI) is conventionally recognized as an urgent medical condition requiring timely and effective reperfusion therapy. However, the results of studies on the clinical outcomes in AMI according to hospital visit timings are inconclusive. To explore the difference in long-term outcomes between off- and on-hour percutaneous coronary interventions (PCI) in patients with AMI of Killip functional classification III-IV (Killip III-IV AMI).
Methods: Data on the characteristics and clinical outcomes of 1,751 patients with Killip III-IV AMI between November 2011 and June 2015 from the Korea Acute Myocardial Infarction Registry-National Institutes of Health registry were analyzed. All participants were allocated into two groups: off-hour (weekdays from 6:00 PM to 8:00 AM, weekends, and legal holidays) and on-hour (weekdays from 8:00 AM to 6:00 PM) groups. The incidence of major adverse cardiac and cerebrovascular events, defined as a composite of all-cause mortality, nonfatal myocardial infarction, any revascularization, cerebrovascular accident, and stent thrombosis, was the primary endpoint.
Results: Among the 1,751 patients, 572 (39.1%) underwent PCI during on-hours and 892 (60.9%) during off-hours. At the 3-year follow-up, no significant difference was found in the clinical outcomes between the two groups in both the unadjusted and propensity-score weighing-adjusted analyses.
Conclusions: The outcomes of patients with Killip III-IV AMI admitted during off- and on-hours were similar.

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1Aerosolized antibiotics in the treatment of hospital-acquired pneumonia/ventilator-associated pneumonia

저자 : Yun Jung Jung , Eun Jin Kim , Young Hwa Choi

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 1-12 (12 pages)

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Aerosolized antibiotics are being increasingly used to treat respiratory infections, especially those caused by drug-resistant pathogens. Their use in the treatment of hospital-acquired pneumonia and ventilator-associated pneumonia in critically ill patients is especially significant. They are also used as an efficient alternative to overcome the issues caused by systemic administration of antibiotics, including the occurrence of drug-resistant strains, drug toxicity, and insufficient drug concentration at the target site. However, the rationale for the use of aerosolized antibiotics is limited owing to their insufficient efficacy and the potential for underestimated risks of developing side effects. Despite the lack of availability of high-quality evidence, the use of aerosolized antibiotics is considered as an attractive alternative treatment approach, especially in patients with multidrug-resistant pathogens. In this review, we have discussed the effectiveness and side effects of aerosolized antibiotics as well as the latest advancements in this field and usage in the Republic of Korea.

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2Metformin and its therapeutic applications in autoimmune inflammatory rheumatic disease

저자 : Ji-won Kim , Jung-yoon Choe , Sung-hwan Park

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 13-26 (14 pages)

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Metformin is a first-line therapeutic agent for type 2 diabetes. Apart from its glucose-lowering effect, metformin is attracting interest regarding possible therapeutic benefits in various other conditions. As metformin regulates cell metabolism, proliferation, growth, and autophagy, it may also modulate immune cell functions. Given that metformin acts on multiple intracellular signaling pathways, including adenosine monophosphate (AMP)-activated protein kinase (AMPK) activation, and that AMPK and its downstream intracellular signaling control the activation and differentiation of T and B cells and inflammatory responses, metformin may exert immunomodulatory and anti-inflammatory effects. The efficacy of metformin has been investigated in preclinical and clinical studies on rheumatoid arthritis, osteoarthritis, systemic lupus erythematosus, Sjögren's syndrome, scleroderma, ankylosing spondylitis, and gout. In this review, we discuss the potential mechanisms through which metformin exerts its therapeutic effects in these diseases, focusing particularly on rheumatoid arthritis and osteoarthritis.

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3Current status of the diagnosis of chronic pancreatitis by ultrasonographic elastography

저자 : Kazunori Nakaoka , Senju Hashimoto , Ryoji Miyahara , Hiroki Kawashima , Eizaburo Ohno , Takuya Ishikawa , Takamichi Kuwahara , Hiroyuki Tanaka , Yoshiki Hirooka

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 27-36 (10 pages)

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Chronic pancreatitis (CP) is pathologically characterized by the loss of exocrine pancreatic parenchyma, irregular fibrosis, cellular infiltration, and ductal abnormalities. Diagnosing CP objectively is difficult because standard diagnostic criteria are insufficient. The change of parenchymal hardness is the key factor for the diagnosis and understanding of the severity of CP. The ultrasonography (US) or endoscopic ultrasonography (EUS) elastography have been used to diagnose pancreatic diseases. Both strain elastography (SE) and shear wave elastography are specific diagnostic techniques for measuring tissue hardness. Most previous studies were conducted with SE. There are three methods of interpreting SE; the method of recognizing the patterns in SE distribution images in the region of interest, the method of using strain ratio to compare the hardness of adipose tissue or connective tissue with that of the lesion, and the method of evaluating the hardness distribution of a target by histogram analysis. These former two methods have been used primarily for neoplastic diseases, and histograms analysis has been used to assess hardness distribution in the evaluation of CP. Since the hardness of the pancreas increases with aging, it is necessary to consider the age in the diagnosis of pancreatic disorders using US or EUS elastography.

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4Is there sufficient evidence to justify changes in dietary habits in heart failure patients? A systematic review

저자 : Alejandra García-garcía , Luis A. Alvarez-sala-walther , Hae-young Lee , Cristina Sierra , Domingo Pascual-figal , Miguel Camafort

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 37-47 (11 pages)

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The incidence and prevalence of heart failure (HF) is increasing worldwide, leading to high morbidity and mortality. The global management of HF involves lifestyle changes in addition to pharmacological treatments. Changes include exercise and dietary recommendations, mainly salt and fluid restriction, but without any clear evidence. We conducted a systematic review to analyse the degree of evidence for these dietary recommendations in HF. Only randomized controlled trials (RCT), and observational studies in humans were selected. Studies were considered eligible if they included participants with HF and sodium and/or fluid restriction. Publications in languages other than English or Spanish were excluded. We included 15 studies related to sodium or fluid restriction. Nine RCT and six observational studies showed some improvements in symptoms and quality of life and a degree of reduction in new hospitalizations, but the results are based on limited population groups, applying different methodologies, and with different restriction goals. We found a lack of clear evidence of the benefits of sodium/fluid restriction in chronic HF. The evidence is limited to few studies with conflicting results. Randomized clinical trials are needed to fill this gap in our knowledge.

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5Challenges to be addressed in management of patients with sinusoidal obstruction syndrome after hematopoietic cell transplantation

저자 : Seong Kyu Park , Young Sok Ji , Se Hyung Kim

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 48-50 (3 pages)

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6Efficacy of hydroxychloroquine for knee osteoarthritis

저자 : Young Ho Lee

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 51-52 (2 pages)

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7Anti-fibrotic effects of branched-chain amino acids on hepatic stellate cells

저자 : Hae Lim Lee , Jungmin Lee , Jung Hoon Cha , Sungwoo Cho , Pil Soo Sung , Wonhee Hur , Seung Kew Yoon , Si Hyun Bae

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 53-62 (10 pages)

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Background/Aims: Patients with liver cirrhosis (LC) have low levels of branched-chain amino acids (BCAAs). There is accumulating evidence that BCAAs have anti-fibrotic effects in cirrhosis. This study is aimed to evaluate the effect of BCAAs on the function and phenotype of activated hepatic stellate cells (HSCs).
Methods: LX-2, an immortalized human stellate cell line, was used in in vitro experiments. LX-2 cells were exposed to transforming growth factor β1 (TGF-β1) and BCAAs or to valine, leucine, and isoleucine, which are components of BCAAs. Activation of the TGF-β signaling pathway in LX-2 cells was observed using real-time quantitative polymerase chain reaction and Western blotting.
Results: The increased expression of snail family transcriptional repressor 1 (SNAI1) was observed in LX-2 cells activated by TGF-β1. After BCAA treatment, its expression was significantly decreased at the mRNA level. The increased expression of Col1α1 and TIMP2 at the mRNA level and alpha smooth muscle actin at the protein level in activated LX-2 cells decreased after BCAA treatment. Among the BCAA components, leucine and valine significantly abrogated TGF-β-induced activation of LX-2 cells. BCAA treatment led to the decreased phosphorylation of Smad2 and p38 proteins, which are markers for Smad and Smad-independent p38 mitogen-activated protein kinase signaling pathways, respectively.
Conclusions: BCAA treatment can improve hepatic fibrosis by directly affecting the activated state of hepatic stellate cells through inhibition of the TGF-β signaling pathway. Among BCAA components, leucine and valine mainly abrogated TGF-β- induced activation of HSCs. Our results suggest that BCAA may be used to attenuate the progression of liver fibrosis.

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8Current trends in the management of pancreatic cystic neoplasms in Korea: a national survey

저자 : Hyung Ku Chon , Sung Hoon Moon , Sang Wook Park , Woo Hyun Paik , Chang Nyol Paik , Byoung Kwan Son , Tae Jun Song , Dong Won Ahn , Eaum Seok Lee , Yun Nah Lee , Yoon Suk Lee , Jae Min Lee , Tae Joo Jeon

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 63-76 (14 pages)

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Background/Aims: The study aimed to investigate the current practice patterns in the management of pancreatic cystic neoplasms in Korea.
Methods: An electronic survey was systematically distributed by email to members of the Korean Pancreatobiliary Association from December 2019 to February 2020.
Results: In total, 115 (110 gastroenterologists, five surgeons) completed the survey, 72.2% of whom worked in a tertiary/ academic medical center. Most (65.2%) followed the 2012/2017 International Association of Pancreatology guidelines for the management of pancreatic cystic neoplasms. A gadolinium-enhanced magnetic resonance imaging/magnetic resonance cholangiopancreatography was the most common first-line diagnostic modality (42.1%), but a contrast-enhanced computed tomography scan was preferred as a subsequent surveillance tool (58.3%). Seventy-four percent of respondents routinely performed endoscopic ultrasound-guided fine needle aspiration for pancreatic cystic neoplasms with suspicious mural nodules. Endoscopic ultrasound-guided fine needle aspiration cytology (94.8%) and cystic fluid carcinoembryonic antigen (95.7%) were used for cystic fluid analysis. Most (94%) typically recommended surgery in patients with high-risk stigmata, but 18.3% also considered proceeding with surgery in patients with worrisome features. Most (96.5%) would continue surveillance of pancreatic cystic neoplasms for more than 5 years.
Conclusions: According to this survey, there was variability in the management of pancreatic cystic neoplasms among the respondents. These results suggest that the development of evidence-based guidelines for pancreatic cystic neoplasms that fit the Korean practice is needed to create an optimal approach to the management of pancreatic cystic neoplasms.

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9Seroprevalence of viral infectious diseases and associated factors in Korean patients with inflammatory bowel diseases

저자 : Hee Seung Hong , Jiwon Jung , Sang Hyoung Park , Hwa Jung Kim , Sung Wook Hwang , Dong-hoon Yang , Jeong-sik Byeon , Seung-jae Myung , Suk-kyun Yang , Byong Duk Ye

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 73-87 (15 pages)

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Background/Aims: Data on the immunoprotective status against measles, mumps, rubella, varicella zoster virus (VZV), hepatitis A virus (HAV), and Epstein-Barr virus (EBV) infection in patients with inflammatory bowel disease (IBD) are still lacking. Therefore, we investigated the seropositivity rates for viral infectious diseases and the associated factors in Korean patients with IBD.
Methods: In this retrospective cohort study, serum immunoglobulin G antibody positivity rates against measles virus, mumps virus, rubella virus, VZV, HAV, and EBV viral capsid antigen (VCA) were measured in patients with Crohn's disease or ulcerative colitis (UC) who first visited the IBD clinic. Seropositivity rates and their associated factors were analyzed.
Results: Between January 2016 and December 2018, 263 patients were enrolled (male, 167 [67.3%]; UC, 134 [50.9%]). The median age at serological test was 30 years (interquartile range, 22 to 46). The seropositivity rates were 84.0%, 85.2%, 66.5%, 87.4%, 50.0%, and 93.7% for measles, mumps, rubella, VZV, HAV, and EBV, respectively. Younger age at serological test was associated with seronegative status for measles (adjusted odds ratio [aOR], 0.92; 95% confidence interval [CI], 0.88 to 0.96), VZV (aOR, 0.83; 95% CI, 0.74 to 0.93), and HAV (aOR, 0.93; 95% CI, 0.91 to 0.95). Furthermore, IBD type-UC was associated with seronegative status against VZV (aOR, 0.33; 95% CI, 0.11 to 0.99).
Conclusions: Seropositivity rates for common viral infectious diseases in Korean patients with IBD were similar to those of the general population. In the younger age group, protective immunity against measles, VZV, and HAV is required, with proper vaccination, as necessary.

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10Extracellular vesicles derived from small intestinal lamina propria reduce antigen-specific immune response

저자 : Tae-seop Shin , Jae Yong Park , Yoon-keun Kim , Jae Gyu Kim

발행기관 : 대한내과학회 간행물 : The Korean Journal of Internal Medicine 37권 1호 발행 연도 : 2022 페이지 : pp. 85-97 (13 pages)

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Background/Aims: Extracellular vesicles (EVs) are secreted from various types of cells and have specific functions related to their origin. EVs are observed in the small intestinal lamina propria (lpEVs), but their function remains unclear. This study aimed to investigate the role of lpEVs.
Methods: LpEVs were isolated from antigen (ovalbumin [OVA])-fed mice (lpEVs/OVA), and administrated to the naïve mice for 5 days before induction of lung inflammation. Afterwards, the mice were sensitized and challenged with OVA to evaluate the role of lpEVs/OVA in the regulation of immune tolerance.
Results: The isolated lpEVs/OVA were sphere-shaped, bi-layered vesicles of approximately 50 to 100 nm in size. The vesicles expressed CD81, A33 antigen, and major histocompatibility complex (MHC) class II on the surface. When administrated to naïve mice, the lpEVs/OVA migrated to the spleen. Intraperitoneal lpEVs/OVA administration to naïve mice decreased the immune response against sensitized antigen in a CD4+FoxP3+T cell-dependent manner.
Conclusions: EVs are actively secreted from small intestinal epithelial cells to deliver information about orally administered antigens to immune cells, which will facilitate the modulation of the immune response by acting as an intercellular communicasome.

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