Publications by authors named "Yiyun Cai"

Introduction: Symptoms during the onset of major depressive disorder [MDD] and bipolar disorder type II [BD-II] are similar. The difference of hippocampus subregion could be a biological marker to distinguish MDD from BD-II.

Methods: We recruited 61 drug-naïve patients with a first-episode MDD and BD-II episode and 30 healthy controls (HC) to participate in a magnetic resonance imaging [MRI] study.

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Astrocytic dysfunction contributes to the molecular pathogenesis of major depressive disorder (MDD). However, the astrocytic subtype that mainly contributes to MDD etiology and whether dysregulated autophagy in astrocytes is associated with MDD remain unknown. Using a single-nucleus RNA sequencing (snRNA-seq) atlas, three astrocyte subtypes were identified in MDD, while C2 State-1Q astrocytes showed aberrant changes in both cell proportion and most differentially expressed genes compared with other subtypes.

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Both depression and sleep disturbance have been linked to inflammation. However, the role that inflammation plays in the relationship between sleep disturbance and depression remains unclear. We examined pairwise associations between inflammatory markers (neutrophil-to-lymphocyte ratio [NLR] and C-reactive protein level [CRP]), sleep disturbance, and depressive symptoms in a robust, ethnically diverse sample (n = 32,749) from the National Health and Nutrition Examination Survey (NHANES).

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Background: Clinical and etiological heterogeneity have hindered our understanding of depression, thus driving the studies of major depressive disorder (MDD) subtypes. Atypical depression (AD) is a subtype of MDD with atypical features. Cognitive impairment is one of the factors that contribute to the suffering of patients with MDD.

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Background: Although disturbances in biological rhythms are closely related to the onset of major depressive disorder (MDD), they are not commonly assessed in Chinese clinical practice. The Biological Rhythms Interview of Assessment in Neuropsychiatry (BRIAN) has been used to evaluate disturbances in biological rhythms in MDD. We aimed to assess and confirm the reliability and validity of the Chinese version of the BRIAN (C-BRIAN) in patients with MDD.

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Article Synopsis
  • The study examined the link between gastrointestinal (GI) symptoms, medication use, and spontaneous drug discontinuation (SDD) among patients with major depressive disorder (MDD) using data from 3,256 participants.
  • Results showed that higher GI symptom frequency correlated with increased use of mood stabilizers and benzodiazepines, while less use of SNRIs, along with concerns about long-term side effects driving medication discontinuation.
  • Findings suggest that GI symptoms contribute significantly to the risk of SDD in MDD patients, highlighting the need for tailored clinical treatments and improved medication adherence strategies.
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Nutritional supplementations have been widely used as adjunctive treatments for schizophrenia. However, among these supplementations, of which the most beneficial is currently unknown. This study aimed to compare and rank the effectiveness of nutritional supplementations in the adjunctive treatments of schizophrenia.

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Article Synopsis
  • Deep brain stimulation (DBS) targeting the habenula (HB) shows promise in easing symptoms of treatment-resistant depression (TRD) and bipolar disorder (BD) in a pilot study involving seven patients.
  • After one month, patients experienced significant reductions in depression and anxiety symptoms (around 49%), alongside improvements in overall health and quality of life, though results varied widely among participants.
  • The study also found that changes in brain activity patterns correlated with symptom severity, suggesting that further research in larger studies is needed to confirm the safety and effectiveness of HB-DBS for mood disorders.
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Background: In spite of numerous options, the most efficacious treatment for major depressive disorder (MDD) remains elusive. Algorithm-guided treatments (AGTs) are proposed to address inadequate remission and optimize treatment delivery. This study aimed to evaluate the clinical benefit of AGTs for MDD, and to explore specific moderators of treatment outcomes for individual patients.

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Background: Little is known how often depressive episodes are accompanied by gastrointestinal symptoms in major depressive disorders (MDD). The authors sought to determine the frequency and clinical correlates of gastrointestinal symptoms during episodes of depressive disorder.

Methods: 3,256 MDD patients from the National Survey on Symptomatology of Depression (NSSD), which was designed to investigate the magnitude of symptoms of current major depressive episodes in China, were enrolled and assessed for gastrointestinal symptoms in this study.

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Biodegradation has been considered as an ideal technique for total petroleum hydrocarbon (TPH) contamination, but its efficiency is limited by its application in the field. Herein, an original TPH-degrading strain, SCYY-5, was isolated from contaminated oil sludge and identified as sp. by 16S rDNA sequence analysis.

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Article Synopsis
  • The study introduces a simple method to create pH-sensitive nanoparticles from nanocellulose through cross-linking polyethyleneimine and glutaraldehyde, showing particular sensitivity at pH 3.
  • The nanoparticles exhibit rapid initial adsorption of arsenic (As(V)), achieving a much higher capacity (255.19 mg/g) at pH 3 compared to lower performance at the original pH (44.33 mg/g).
  • Tests showed that common anions in acidic wastewater didn't significantly affect arsenic adsorption, and the nanoparticles maintained effectiveness even after eight reuse cycles, highlighting their potential for removing arsenic contaminants.
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By using the "bridge joint" effect of iron ions, cellulose nanocrystal-containing high-performance adsorbents were synthesized via coprecipitation method, which enhanced the cross-linking action of cellulose nanocrystal and polyethyleneimine. The morphology, specific surface area, surface chemistry and chemical valence of the adsorbents were characterized by SEM, FTIR, BET and XPS. According to the results, the iron ions successfully connect the two dispersed polymers together, inducing a large number of O-Fe-O bonds and, providing more adsorption active sites for the removal of seriously polluted and high-toxicity As(III)/As(V).

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Background: Early improvement (EI) following treatment with antidepressants is a widely reported predictor to the treatment response. This study aimed to identify the resting-state functional connectivity (rs-FC) and its related clinical features that link the treatment response at the time of EI.

Methods: This study included 23 first-episode treatment-naive patients with MDD.

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Background: This research was designed to investigate patient-reported and doctor-reported reasons for the discontinuation of pharmacological treatment in Chinese patients with major depressive disorder (MDD), which was part of the National Survey on Symptomatology of Depression (NSSD) from 2014 to 2015.

Methods: This cross-sectional study included 649 patients who had discontinued antidepressant medications and 711 patients who had remained on them, selected from a group of 3516 candidates who have had at least one depressive episode. Differences in the two groups' sociodemographic factors, clinical characteristics, medication use, and self-reported reasons for drug discontinuation were compared via Student's t-test or chi-square test.

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Purpose: Early improvement in major depressive disorder is defined as a reduction of ≥20% in the 17-item Hamilton Depression Rating Scale (HAM-D-17) score at the second week after initiation of treatment, predicting long-term treatment response. However, there remains no effective strategy for switching medications when a patient fails to reach early improvement at the second week. This study focused on the predictive value of early symptom changes in each item of the HAM-D-17 scale for treatment response to selective serotonin reuptake inhibitor (SSRI) monotherapy and to provide a reference for switching antidepressants to enhance early treatment efficacy.

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Background: The occurrence of complications during the gestation period is higher among pregnant women with a history of complications than among pregnant women without previous complications. High-risk pregnancy can cause negative emotional symptoms such as anxiety and depression in pregnant women. Current research on anxiety and depression symptoms in pregnant women is sparse.

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Background: Major depressive disorder (MDD) is a common mental illness with high lifetime prevalence close to 20%. Positron emission tomography (PET) studies have reported decreased prefrontal, insular and limbic cerebral glucose metabolism in depressed patients compared with healthy controls. However, the literature has not always been consistent.

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Psychological status and quality of life in postoperative acoustic neuroma patients were well documented. However, few studies have been proceed in China and investigated in a relative homogenous group. To assess the psychological status and quality of life in patients with facial palsy operated by an identical surgeon in Shanghai, China.

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Maternal stress can disturb normal fetal neurodevelopmental progress, and lead to negative behavioral and neuroendocrine consequences for the offspring. These effects may be related to alterations in the hypothalamic-pituitary-adrenal (HPA) axis. Early life events disrupting the function of the HPA axis may be associated with epigenetic modification.

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