Autophagy is an important degradative pathway that eliminates misfolded proteins and damaged organelles from cells. Autophagy is crucial for neuronal homeostasis and function. A lack of or deficiency in autophagy leads to the accumulation of protein aggregates, which are associated with several neurodegenerative diseases. Compared with non-neuronal cells, neurons exhibit rapid autophagic flux because damaged organelles or protein aggregates cannot be diluted in post-mitotic cells; because of this, these cells exhibit characteristic features of autophagy, such as compartment-specific autophagy, which depends on polarized structures and rapid autophagy flux. In addition, neurons exhibit compartment-specific autophagy, which depends on polarized structures. Neuronal autophagy may have additional physiological roles other than amino acid recycling. In this review, we focus on the characteristics and regulatory factors of neuronal autophagy. We also describe intracellular selective autophagy in neurons and its association with neurodegenerative diseases.

BACKGROUND: Lung cancer is the most common cause of cancer-related death, and adenocarcinoma is the most common histologic subtype. MicroRNA is a small non-coding RNA that inhibits multiple target gene expression at the post-transcriptional level and is commonly dysregulated in malignant tumors. The purpose of this study was to analyze the expression of microRNA-374a (miR-374a) in lung adenocarcinoma and correlate its expression with various clinicopathological characteristics.METHODS: The expression level of miR-374a was measured in 111 formalin-fixed paraffin-embedded lung adenocarcinoma tissues using reverse transcription-quantitative polymerase chain reaction assays. The correlation between miR-374a expression and clinicopathological parameters, including clinical outcome, was further analyzed.RESULTS: High miR-374 expression was correlated with advanced pT category (chi-square test, p=.004) and pleural invasion (chi-square test, p=.034). Survival analysis revealed that patients with high miR-374a expression had significantly shorter disease-free survival relative to those with low miR-374a expression (log-rank test, p=.032).CONCLUSIONS: miR-374a expression may serve as a potential prognostic biomarker for predicting recurrence in early stage lung adenocarcinoma after curative surgery.
Adenocarcinoma ; Disease-Free Survival ; Gene Expression ; Humans ; Lung Neoplasms ; Lung ; MicroRNAs ; Polymerase Chain Reaction ; Recurrence ; RNA, Small Untranslated

PURPOSE: This study aimed to investigate child abuse awareness and reporting intention among nursing and education students and correlations among the variables involved. METHODS: A cross-sectional study was conducted by administering an online questionnaire to 70 nursing college students and 70 education college students. Data were analyzed using descriptive statistics, t-test, chi-squared test, the Mann-Whitney U test, and Pearson's correlation in SPSS 21.0 (IBM, Armonk, NY). RESULTS: The mean score of child abuse awareness was 3.61±0.32 for nursing students and 3.60±0.36 for education students. The mean score of reporting intention was 5.65±0.90 for nursing students and 5.38±1.03 for education students. Females presented higher scores than males in the awareness of sexual abuse. The awareness of emotional abuse was higher in students who knew of reporting obligations or who had experienced abuse. Child abuse awareness and reporting intention were significantly positively correlated. Also, the number of times having received child abuse education was correlated with reporting intention in both mild and severe cases of abuse. CONCLUSION: Reporting intention is not only related to having received education, but also to the frequency of that education. Child abuse education is important to increase reporting intention and should be delivered repeatedly.
Child ; Child Abuse ; Child ; Cross-Sectional Studies ; Education ; Female ; Humans ; Intention ; Male ; Nursing ; Sex Offenses ; Students, Nursing

Purpose: Single-incision cholecystectomy is a surgical method that offers comparable results to conventional laparoscopic cholecystectomy. However, a high risk of postoperative incisional hernia is an issue in single-incision cholecystectomy. This study evaluated the risk factors and incidences of incisional hernia after single-incision cholecystectomy and the advantage issue of using barbed suture material during wound closures. Methods: A total of 1,111 patients underwent laparoscopic or robotic single-incision cholecystectomy between March 2014 and February 2020 at our institution at CHA Bundang Medical Center. During this period, there were 693 patients who underwent wound closure with monofilament suture material (Monosyn 2-0; B. Braun) and the other 418 patients used barbed suture material (Stratafix 2-0; Ethicon). Results: The two patient groups were comparable in age, body mass index, and diagnosis. The total incidence of incisional hernia after single-incision cholecystectomy was 0.5% (five cases). All patients who developed incisional hernia were in the monofilament suture material group (0.7% vs. 0%, p = 0.021). The inf luence of predictive and possible risk factors on incisional hernia rate was analyzed. Among these factors, only old age was an independent predictive risk factor of incisional hernia. Conclusion Our study showed a low incidence of incisional hernia, all of which occurred in the monofilament suture material group. If technically appropriate, single-incision cholecystectomy does not appear to present a high incidence of hernia. Barbed suture material can be safely applied in wound closure showing comparable incisional hernia incidence to monofilament suture material.

Purpose: Single-incision cholecystectomy is a surgical method that offers comparable results to conventional laparoscopic cholecystectomy. However, a high risk of postoperative incisional hernia is an issue in single-incision cholecystectomy. This study evaluated the risk factors and incidences of incisional hernia after single-incision cholecystectomy and the advantage issue of using barbed suture material during wound closures. Methods: A total of 1,111 patients underwent laparoscopic or robotic single-incision cholecystectomy between March 2014 and February 2020 at our institution at CHA Bundang Medical Center. During this period, there were 693 patients who underwent wound closure with monofilament suture material (Monosyn 2-0; B. Braun) and the other 418 patients used barbed suture material (Stratafix 2-0; Ethicon). Results: The two patient groups were comparable in age, body mass index, and diagnosis. The total incidence of incisional hernia after single-incision cholecystectomy was 0.5% (five cases). All patients who developed incisional hernia were in the monofilament suture material group (0.7% vs. 0%, p = 0.021). The inf luence of predictive and possible risk factors on incisional hernia rate was analyzed. Among these factors, only old age was an independent predictive risk factor of incisional hernia. Conclusion Our study showed a low incidence of incisional hernia, all of which occurred in the monofilament suture material group. If technically appropriate, single-incision cholecystectomy does not appear to present a high incidence of hernia. Barbed suture material can be safely applied in wound closure showing comparable incisional hernia incidence to monofilament suture material.

Purpose: Mesenchymal epithelial transition (MET) is a proto-oncogene that encodes a heterodimerictransmembrane receptor tyrosine kinase for the hepatocyte growth factor. Aberrant METsignaling has been described in several solid tumors—especially non-small cell lung cancer—and is associated with tumor progression and adverse prognosis. As MET is a potentialtherapeutic target, information regarding its prevalence and clinicopathological relevanceis crucial. Materials and Methods: We investigated MET expression and gene amplification in 113 gallbladder cancers usingtissue microarray. Immunohistochemistry was used to evaluate MET overexpression, andsilver/fluorescence in situ hybridization (ISH) was used to assess gene copy number. Results: MET overexpression was found in 37 cases of gallbladder carcinoma (39.8%), and geneamplification was present in 17 cases (18.3%). MET protein expression did not correlatewith MET amplification. MET amplification was significantly associated with aggressive clinicopathologicalfeatures, including high histological grade, advanced pT category, lymphnode metastasis, and advanced American Joint Committee on Cancer stage. There was nosignificant correlation between any clinicopathological factors and MET overexpression. Nodifference in survival was found with respect to MET overexpression and amplification status. Conclusion Our data suggested that MET might be a potential therapeutic target for targeted therapyin gallbladder cancer, because MET amplification was found in a subset of tumors associatedwith adverse prognostic factors. Detection of MET amplification by ISH might be a usefulpredictive biomarker test for anti-MET therapy.

PURPOSE: Wnt7a is a glycoprotein involved in embryonic development and the progression of different types of malignant tumors. This study aimed to detect the level of Wnt7a expression in breast cancer and explore its role in the disease progression and prognosis. METHODS: A total of 258 patients diagnosed with invasive ductal carcinoma of the breast were included in this study. Using tissue microarray and immunohistochemical staining, we evaluated the association between Wnt7a expression and clinicopathological parameters, and the prognostic value of Wnt7a. RESULTS: Wnt7a expression was significantly correlated with estrogen receptor (ER) expression (odds ratio, 3.95; 95% confidence interval [CI], 1.99–7.80; p < 0.001). On univariate and multivariate analyses, loss of Wnt7a expression was associated with poor disease-free survival (DFS) (multivariate hazard ratio [HR], 9.12; 95% CI, 1.80–46.09; p=0.008), but not with poor overall survival (OS). In the ER-positive group (n=114), loss of Wnt7a expression was an independent prognostic factor for shorter DFS (multivariate HR, 13.54; 95% CI, 1.11–165.73; p=0.042) and OS (multivariate HR, 4.76; 95% CI, 1.29–17.61; p=0.019) on univariate and multivariate analyses. However, in the ER-negative group, there was no significant difference in DFS and OS according to Wnt7a expression. CONCLUSION: The loss of Wnt7a expression might be a meaningful factor in assessing DFS and OS, especially in ER-positive breast cancer.
Breast Neoplasms* ; Breast* ; Carcinoma, Ductal ; Disease Progression ; Disease-Free Survival ; Embryonic Development ; Estrogens* ; Female ; Glycoproteins ; Humans ; Multivariate Analysis ; Pregnancy ; Prognosis ; Receptors, Estrogen ; Wnt Proteins

BACKGROUND AND PURPOSE: The anti-John-Cunningham virus (JCV)-antibody serostatus and index are used in the risk stratification of progressive multifocal leukoencephalopathy (PML) in multiple sclerosis (MS) patients treated with natalizumab. However, little information on these parameters is available for Asian countries. The purpose of this study was to determine the rate of seropositivity, index, and longitudinal index evolution in Korean patients with MS. METHODS: The antibody seroprevalence was analyzed in 355 samples from 187 patients with clinically isolated syndrome or MS using a second-generation, two-step, enzyme-linked immunosorbent assay. A 4-year longitudinal evaluation was applied to 66 patients. RESULTS: The overall antibody seroprevalence was 80% (n=149). Among antibody-positive patients, the index had a median value of 3.27 (interquartile range, 1.52–4.18), with 77% (n=114) and 56% (n=83) of patients having indices >1.5 and >3.0, respectively. The serostatus of 59 (89%) of the 66 patients did not change during the longitudinal analysis, while 3 (6%) of the 53 patients who were initially seropositive reverted to seronegativity, and 2 (15%) of the 13 patients who were initially seronegative converted to seropositivity. All patients with a baseline index >0.9 maintained seropositivity, and 92% of patients with a baseline index >1.5 maintained this index over 4 years. No patients developed PML (median disease duration, 8 years). CONCLUSIONS: The seroprevalence and index of anti-JCV antibodies in Korean patients with MS may be higher than those in Western countries.
Antibodies ; Asia ; Asian Continental Ancestry Group ; Enzyme-Linked Immunosorbent Assay ; Humans ; JC Virus ; Leukoencephalopathy, Progressive Multifocal ; Multiple Sclerosis ; Natalizumab ; Seroepidemiologic Studies

BACKGROUND: Smad4 and PTEN are prognostic indicators for various tumor types. Smad4 regulates tumor suppression, whereas PTEN inhibits cell proliferation. We analyzed and compared the performance of Smad4 and PTEN for predicting the prognosis of patients with colorectal adenocarcinoma. METHODS: Combined expression patterns based on Smad4+/– and PTEN+/– status were evaluated by immunostaining using a tissue microarray of colorectal adenocarcinoma. The relationships between the protein expression and clinicopathological variables were analyzed. RESULTS: Smad4–/PTEN– status was most frequently observed in metastatic adenocarcinoma, followed by primary adenocarcinoma and tubular adenoma (p<.001). When Smad4–/PTEN– and Smad4+/PTEN+ groups were compared, Smad4–/PTEN– status was associated with high N stage (p=.018) and defective mismatch repair proteins (p=.006). Significant differences in diseasefree survival and overall survival were observed among the three groups (Smad4+/PTEN+, Smad4–/PTEN+ or Smad4+/PTEN–, and Smad4–/PTEN–) (all p<.05). CONCLUSIONS: Concurrent loss of Smad4 and PTEN may lead to more aggressive disease and poor prognosis in patients with colorectal adenocarcinoma compared to the loss of Smad4 or PTEN alone.
Adenocarcinoma ; Adenoma ; Cell Proliferation ; Colonic Neoplasms ; DNA Mismatch Repair ; Humans ; Prognosis

BACKGROUND: BRCA1-associated protein 1 (BAP1) mutations are frequently reported in clear cell renal cell carcinoma (ccRCC); however, very few studies have evaluated the role of these mutations in other renal cell carcinoma (RCC) subtypes. Therefore, we analyzed BAP1 protein expression using immunohistochemistry in several RCC subtypes and assessed its relationship with clinicopathological characteristics of patients. METHODS: BAP1 expression was immunohistochemically evaluated in tissue microarray blocks constructed from 371 samples of RCC collected from two medical institutions. BAP1 expression was evaluated based on the extent of nuclear staining in tumor cells, and no expression or expression in < 10% of tumor cells was defined as negative. RESULTS: Loss of BAP1 expression was observed in ccRCC (56/300, 18.7%), chromophobe RCC (6/26, 23.1%), and clear cell papillary RCC (1/4, 25%), while we failed to detect BAP1 expression loss in papillary RCC, acquired cystic disease-associated RCC, or collecting duct carcinoma. In ccRCC, loss of BAP1 expression was significantly associated with high World Health Organization (WHO)/International Society of Urological Pathology (ISUP) grade (p = .002); however, no significant correlation was observed between loss of BAP1 expression and survival in ccRCC. Loss of BAP1 expression showed no association with prognostic factors in chromophobe RCC. CONCLUSIONS: Loss of BAP1 nuclear expression was observed in both ccRCC and chromophobe RCC. In addition, BAP1 expression loss was associated with poor prognostic factors such as high WHO/ISUP grade in ccRCC.
Carcinoma, Renal Cell ; Humans ; Immunohistochemistry ; Pathology ; World Health Organization