Publications by authors named "Hyun-Sang Cho"

: As modulators of the tumor microenvironment, macrophages have been extensively studied for their potential in developing anticancer strategies, particularly in regulating macrophage polarization towards an antitumorigenic (M1) phenotype rather than a protumorigenic (M2) one in various experimental models. Here, we evaluated the effect of PD98059, a mitogen-activated protein kinase kinase MAPKK MEK1-linked pathway inhibitor, on the differentiation and polarization of THP-1 monocytes in response to phorbol-12-myristate-13-acetate (PMA) under various culture conditions for tumor microenvironmental application. : Differentiation and polarization of THP-1 were analyzed by flow cytometry and RT-PCR.

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Article Synopsis
  • Preauricular sinuses are common birth defects in the ear, characterized by small openings usually found at the front of the ear's helix, and when they connect two spaces, they're called preauricular fistulas.
  • They can also appear behind the tragus as a rarer variant known as postauricular sinuses.
  • Surgical removal is often necessary for recurrent issues, and a complete excision of the affected tissue is essential; this text discusses a rare case of a woman with both types of sinuses.
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Background: Herniation of the temporomandibular joint (TMJ) into the external auditory canal (EAC) due to a bony defect in the EAC is rare. Such bony defects can be secondary to inflammation, neoplasm, trauma. In rare instances, TMJ herniation can occur when the Huschke foramen is constantly exposed.

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Herniation of the temporomandibular joint (TMJ) into the external auditory canal (EAC) is rare. The TMJ and EAC are separated by the anterior bony wall of the EAC. Such a defect can be caused by trauma, infection, neoplasm, inflammation, and in rare cases, congenital bony defects.

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Background: Individuals with bipolar disorder show mood instability, including heightened anger and impulsivity. The Ultimatum Game (UG) is a tool used to evaluate emotional and social decision-making strategies. We investigated behavioral and electrophysiological responses to subjectively fair or unfair offers in the UG in patients with bipolar I disorder.

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Background: A few studies have reported the use of middle ear implants (MEIs) in older adults.

Objectives: To evaluate the audiologic outcomes and postoperative complications of MEIs in older adults.

Methods: This retrospective study reviewed audiologic data and medical records from a single referral centre.

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Aim: A social network, which is a set of people connected through socially meaningful relationships, is considered protective for neurocognitive disorders. Men and women have been found to have different opportunities for social participation and it is possible social networks do not form the same way. We hypothesized, male and female social networks would have different protective influences on cognitive function.

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Background: A growing body of literature has suggested that effective emotion regulation is influenced by cognitive function. Maintenance and manipulation of internal representations occur in working memory (WM), and impairments of WM have been reported in patients with bipolar disorder.

Methods: We examined the manipulation ability of internal representations in WM using mental rotation (MR) tasks, and compared the task performances of euthymic bipolar I disorder patients to those of schizophrenia patients and healthy controls.

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We report an interesting case of maxillary sinus pneumocele that presented with aesthetic deformity and completely treated with Caldwell-Luc approach and thoroughly review all of the past literature focusing on clinical symptoms and surgical approach. Based on our comprehensive review of maxillary sinus pneumocele, we found 2 important characteristics. First, maxillary sinus pneumocele may be asymptomatic but cause various symptoms owing to the displacement of neighboring structures, such as facial symptoms, eye symptoms, and nasal obstruction.

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Background: Emotion regulation (ER) applies behavioral and cognitive strategies to modify the appearance and intensity of emotions. Working memory capacity (WMC) plays an important role in the ER process, particularly through its influence on the efficiency of ER strategies.

Methods: We investigated interactions between WMC and three ER strategies, namely cognitive reappraisal, expressive suppression, and rumination, in 43 euthymic patients with bipolar I disorder and 48 healthy control subjects.

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Objectives: Hearing loss disrupts the balance of auditory-somatosensory inputs in the cochlear nucleus (CN) of the brainstem, which has been suggested to be a mechanism of tinnitus. This disruption results from maladaptive auditory-somatosensory plasticity, which is a form of axonal sprouting. Axonal sprouting is promoted by transforming growth factor (TGF)-β signaling, which can be inhibited by losartan.

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Aims: Bipolar disorder is characterized by behavioral changes such as risk-taking and increasing goal-directed activities, which may result from altered reward processing. Patients with bipolar disorder show impaired reward learning in situations that require the integration of reinforced feedback over time. In this study, we examined the behavioral and electrophysiological characteristics of reward learning in manic and euthymic patients with bipolar disorder using a probabilistic reward task.

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Conclusion: In this series, the split type hypoglossal-facial nerve anastomosis resulted in more favorable outcomes in terms of both facial function and tongue atrophy.

Objective: This study compared surgical techniques for hypoglossal-facial nerve anastomosis after schwannoma removal and evaluated which technique achieves better facial outcomes and less tongue morbidity.

Method: This study included 14 patients who underwent hypoglossal-facial nerve anastomosis after schwannoma removal and were followed for more than 1 year.

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α-Lipoic acid (ALA) has been reported to be effective in reducing body weight in rodents and obese patients. Our previous open trial showed that ALA may play a role in reducing weight gain in patients with schizophrenia on atypical antipsychotics. The present study evaluated the efficacy of ALA in reducing weight and BMI in patients with schizophrenia who had experienced significant weight gain since taking atypical antipsychotics.

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Background: Disturbances in thought, speech, and linguistic processing are frequently observed in bipolar manic patients, but the underlying neurophysiological mechanisms are not well understood. P600 is a distinct, positive event-related potential component elicited by syntactic violations. Using the P600 ERP, we examined neural processing of syntactic language comprehension in patients with bipolar mania compared to patients with schizophrenia and healthy people.

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The ability to accurately perceive dominance in the social hierarchy is important for successful social interactions. However, little is known about dominance perception of emotional stimuli in bipolar disorder. The aim of this study was to investigate the perception of social dominance in patients with bipolar I disorder in response to six facial emotional expressions.

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The aim of this study is to determine whether rhinologic preoperative evaluation and pretreatments reduce intranasal trauma and decrease postoperative complications, such as nasal obstruction and epistaxis, in patients undergoing 2-jaw surgery with nasotracheal intubation. This study included 360 patients with malocclusion (Class III) who underwent 2-jaw surgery under general anesthesia via nasotracheal intubation in our hospital from January to December 2013 and categorized into 3 groups. Nasotracheal intubation was performed according to the nasal cavity the patient was able to breathe comfortably (Group I).

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Both emotional and cognitive processes are involved in moral judgments. Ventromedial prefrontal lesions are related to impaired prosocial emotions and emotional dysregulation, and patients with these lesions exhibit increased utilitarian judgments of emotionally salient personal moral dilemmas. Bipolar patients experiencing manic episode also have impaired emotional regulation and behavioral control.

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We aimed to examine internalized stigma of patients with mental illness in Korea and identify the contributing factors to internalized stigma among socio-demographic, clinical, and psychosocial variables using a cross-sectional study design. A total of 160 patients were recruited from a university mental hospital. We collected socio-demographic data, clinical variables and administered self-report scales to measure internalized stigma and levels of self-esteem, hopelessness, social support, and social conflict.

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Background: Time perception, which plays a fundamental role in decision-making and the evaluation of the environment, is also influenced by emotions. Patients with bipolar disorder have impairments in emotional processing as well as interval timing. We investigated the effects of emotional stimuli on time estimation and reproduction in manic and euthymic bipolar patients compared with healthy controls.

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This study aimed to investigate the overall prescription pattern for patients with bipolar disorders in Korea and its relevance to the practice guidelines. Prescription records from all patients with bipolar I and II disorders who have been admitted or who started the outpatient treatment during the year of 2009 in 10 academic setting hospitals were reviewed. A total of 1447 patients with bipolar I and II disorders were included in this study.

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Mitochondrial dysfunction reflects a lifelong cumulative burden of cellular damage, and a decrease in mitochondrial DNA (mtDNA) copy number is associated with oxidative stress and chronic inflammation. The goal of this study was to assess whether mitochondrial dysfunction and a decrease in mtDNA copy number are common features of patients with obstructive sleep apnea syndrome (OSA). We compared mtDNA copy number between 20 healthy volunteers and 20 patients with OSA and investigated whether a significant attenuation of mtDNA copy number was observed in genomic DNA isolated from whole blood of OSA patients.

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Objectives: This study aimed to evaluate the hypothesis that relief of nasal obstruction in subjects with obstructive sleep apnea (OSA) would lead to reduce OSA severity and to discuss the available evidence on the clinical efficacy of nasal surgery as a treatment modality for OSA.

Study Design: Twenty-five subjects who had reduced patency of nasal cavity and narrowing of retroglossal or retropalatal airways were diagnosed with OSA and underwent nasal surgery, such as septoplasty or turbinoplasty to correct nasal pathologies. The effect of the surgery on nasal patency was quantified by measuring minimal cross-sectional area (MCA) using acoustic rhinometry.

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Appropriate stress-coping strategies are needed to improve the outcome in the treatment of bipolar disorders, as stressful life events may aggravate the course of the illness. The aim of this study was to compare stress-coping behaviors between bipolar patients and healthy controls. A total of 206 participants comprising 103 bipolar patients fulfilling the Diagnostic and Statistical Manual for Axis I disorder fourth edition (DSM-IV) diagnostic criteria for bipolar I and II disorders and controls matched by age and sex were included in this study.

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