Development of a prediction model for suicidal ideation in patients with advanced cancer: A multicenter, real-world, pan-cancer study in China.

BACKGROUND: Patients diagnosed with advanced stage cancer face an elevated risk of suicide. We aimed to develop a suicidal ideation (SI) risk prediction model in patients with advanced cancer for early warning of their SI and facilitate suicide prevention in this population. PATIENTS AND METHODS: We consecutively enrolled patients with multiple types of advanced cancers from 10 cancer institutes in China from August 2019 to December 2020. Demographic characteristics, clinicopathological data, and clinical treatment history were extracted from medical records. Symptom burden, psychological status, and SI were assessed using the MD Anderson Symptom Inventory (MDASI), Hospital Anxiety and Depression Scale (HADS), and Patient Health Questionnaire-9 (PHQ-9), respectively. A multivariable logistic regression model was employed to establish the model structure. RESULTS: In total, 2814 participants were included in the final analysis. Nine predictors including age, sex, number of household members, history of previous chemotherapy, history of previous surgery, MDASI score, HADS-A score, HADS-D score, and life satisfaction were retained in the final SI prediction model. The model achieved an area under the curve (AUC) of 0.85 (95% confidential interval: 0.82-0.87), with AUCs ranging from 0.75 to 0.95 across 10 hospitals and higher than 0.83 for all cancer types. CONCLUSION: This study built an easy-to-use, good-performance predictive model for SI. Implementation of this model could facilitate the incorporation of psychosocial support for suicide prevention into the standard care of patients with advanced cancer.

Association between anxiety, depression, and symptom burden in patients with advanced colorectal cancer: A multicenter cross-sectional study.

OBJECTIVES: Patients with advanced colorectal cancer (CRC) have multiple concurrent physical and psychological symptoms. This study aimed to explore the relationship between anxiety, depression, and symptom burden in advanced CRC. METHODS: A multicenter cross-sectional study was conducted in 10 cancer centers from geographically and economically diverse sites in China. A total of 454 patients with advanced CRC completed the Hospital Anxiety and Depression Scale and the MD Anderson Symptom Inventory. Multiple regression analysis was applied to explore the relationship between anxiety, depression and symptom burden. RESULTS: About one-third of the patients showed symptoms of anxiety or depression. Patients with anxiety or depression reported significantly higher symptom burden than those without (p < 0.001). Patients with anxiety or depression reported a higher proportion of moderate-to-severe (MS) symptom number than those without (p < 0.001). About 52% of the patients with anxiety or depression reported at least three MS symptoms. The prevalence of MS symptoms was ranging from 7.3% (shortness of breath) to 22% (disturbed sleep), and in patients with anxiety or depression was 2-10 times higher than in those without (p < 0.001). Disease stage (ß = -2.55, p = 0.003), anxiety (ß = 15.33, p < 0.001), and depression (ß = 13.63, p < 0.001) were associated with higher symptom burden. CONCLUSIONS: Anxiety and depression in patients with advanced cancer correlated with higher symptom burden. Findings may lead oncology professionals to pay more attention to unrecognized and untreated psychological symptoms in symptom management for advanced cancer patients.

[Retracted] Tripartite motif 16 suppresses breast cancer stem cell properties through regulation of Gli­1 degradation via the ubiquitin­proteasome pathway.

Following the publication of the above paper, it was drawn to the Editors' attention by a concerned reader that the data obtained from sphere­forming assay experiments shown in Figs. 4C­F and 8B and C, and western blotting data in Figs. 4A and 8A, were strikingly similar to data appearing in different form in other articles by different authors from different research institutes that had already been published, one of which has been retracted. Moreover, a pair of data panels comparing between Fig. 4E and 8C were partly overlapping, such that these data appear to have been derived from the same original source. Owing to the fact that the contentious data in the above article had already been published elsewhere prior to its submission to Oncology Reports, the Editor has decided that this paper should be retracted from the Journal. The authors were asked for an explanation to account for these concerns, but the Editorial Office did not receive a reply. The Editor apologizes to the readership for any inconvenience caused. [Oncology Reports 35: 1204­1212, 2016; DOI: 10.3892/or.2015.4437].

Suicidal ideation in Chinese patients with advanced breast cancer: a multi-center mediation model study.

PURPOSE: The pathways underpinning suicide ideation (SI) and certain physical and psychological factors in patients with advanced breast cancer remain unclear. This study develops and validates a mediation model that delineates the associations between several multidimensional variables and SI in Chinese patients with advanced breast cancer. METHODS: Patients with advanced breast cancer (n = 509) were recruited as study participants from 10 regional cancer centers across China from August 2019 to December 2020. Participants were required to complete five questionnaires using an electronic patient-reported outcomes (ePRO) system: 9 item- Patient Health Questionnaire (PHQ-9), Hospital Anxiety and Depression Scale (HADS), Insomnia Severity Index (ISI), 5-level EQ-5D (EQ-5D-5L), and MD Anderson Symptom Inventory (MDASI). Risk factors for SI were identified using multivariable logistic regression, and inputted into serial multiple mediation models to elucidate the pathways linking the risk factors to SI. RESULTS: SI prevalence was 22.8% (116/509). After adjusting for covariates, depression (odds ratio [OR] = 1.384), emotional distress (OR = 1.107), upset (OR = 0.842), and forgetfulness (OR = 1.236) were identified as significant independent risk factors (all p < 0.05). The ORs indicate that depression and distress have the strongest associations with SI. Health status has a significant indirect effect (OR=-0.044, p = 0.005) and a strong total effect (OR=-0.485, p < 0.001) on SI, mediated by insomnia severity and emotional distress. CONCLUSIONS: There is a high SI prevalence among Chinese patients with advanced breast cancer. Our analysis revealed predictive pathways from poor health to heightened SI, mediated by emotional distress and insomnia. Regular management of distress and insomnia can decrease suicide risk in this vulnerable population.

The longitudinal relationship between self-compassion and cancer patients' unmet supportive care needs.

OBJECTIVES: Unmet supportive care needs are associated with psychological symptoms such as depression and anxiety. However, so far, few studies have explored the protective psychological factors of unmet needs. Therefore, this study intends to explore the protective effect of self-compassion on unmet needs of Chinese cancer patients and to examine the predictive role of self-compassion on these needs during treatment. METHODS: A longitudinal study was performed at Shaanxi Provincial Cancer Hospital in Xi'an, China. A total of 153 heterogeneous cancer patients were assessed after the first diagnosis (T1), at the beginning (T2) and end (T3) of medical treatment. Hierarchical linear regression analyses were used to examine the research questions. RESULTS: Cross-sectional regression analyses showed that self-compassion at T1 was significantly related to psychological needs at T1. Negative self-compassion at T1 was significantly related to total unmet needs, psychological needs, health system, and information and sexual needs. Longitudinal regression analyses showed that self-compassion at T1 significantly predicted total unmet needs; health system and information (HSI) needs at T2, psychological needs at T3, and negative self-compassion at T1 significantly predicted total unmet needs, HSI needs, physical needs, and patient care needs at T2 when controlling for unmet needs at T1. Positive self-compassion was not a predictor of unmet needs. CONCLUSIONS: Self-compassion can be a protective factor of unmet needs in cancer patients. Future intervention studies should focus on improving the overall level of self-compassion and reducing the level of negative self-compassion in cancer patients to reduce patients' unmet needs.

Physical symptoms and anxiety and depression in older patients with advanced cancer in China: a network analysis.

BACKGROUND: Little is understood about the association between psychosomatic symptoms and advanced cancer among older Chinese patients. METHODS: This secondary analysis was part of a multicenter cross-sectional study based on an electronic patient-reported outcome platform. Patients with advanced cancer were included between August 2019 and December 2020 in China. Participants (over 60 years) completed the MD Anderson Symptom Inventory (MDASI) and Hospital Anxiety and Depression Scale (HADS) to measure symptom burden. Network analysis was also conducted to investigate the network structure, centrality indices (strength, closeness, and betweenness) and network stability. RESULTS: A total of 1022 patients with a mean age of 66 (60-88) years were included; 727 (71.1%) were males, and 295 (28.9%) were females. A total of 64.9% of older patients with advanced cancer had one or more symptoms, and up to 80% had anxiety and depression. The generated network indicated that the physical symptoms, anxiety and depression symptom communities were well connected with each other. Based on an evaluation of the centrality indices, 'distress/feeling upset' (MDASI 5) appears to be a structurally important node in all three networks, and 'I lost interest in my own appearance' (HADS-D4) had the lowest centrality indices. The network stability was relatively high (> 0.7). CONCLUSION: The symptom burden remains high in older patients with advanced cancer in China. Psychosomatic symptoms are highly interactive and often present as comorbidities. This network can be used to provide targeted interventions to optimize symptom management in older patients with advanced cancer in China. TRIAL REGISTRATION: Chinese Clinical Trial Registry (ChiCTR1900024957), registered on 06/12/2020.

Ultrathin Magnesium-Based Coating as an Efficient Oxygen Barrier for Superconducting Circuit Materials.

Scaling up superconducting quantum circuits based on transmon qubits necessitates substantial enhancements in qubit coherence time. Over recent years, tantalum (Ta) has emerged as a promising candidate for transmon qubits, surpassing conventional counterparts in terms of coherence time. However, amorphous surface Ta oxide layer may introduce dielectric loss, ultimately placing a limit on the coherence time. In this study, a novel approach for suppressing the formation of tantalum oxide using an ultrathin magnesium (Mg) capping layer is presented. Synchrotron-based X-ray photoelectron spectroscopy studies demonstrate that oxide is confined to an extremely thin region directly beneath the Mg/Ta interface. Additionally, it is demonstrated that the superconducting properties of thin Ta films are improved following the Mg capping, exhibiting sharper and higher-temperature transitions to superconductive and magnetically ordered states. Moreover, an atomic-scale mechanistic understanding of the role of the capping layer in protecting Ta from oxidation is established based on computational modeling. This work provides valuable insights into the formation mechanism and functionality of surface tantalum oxide, as well as a new materials design principle with the potential to reduce dielectric loss in superconducting quantum materials. Ultimately, the findings pave the way for the realization of large-scale, high-performance quantum computing systems.

Profiles of self-compassion and psychological outcomes in cancer patients.

OBJECTIVES: The protective role of self-compassion in cancer patients' psychological outcomes has been confirmed. However, using a composite score of self-compassion, previous research could not clarify how distinct components of self-compassion may mutually interact. This study, using a person-centred approach, aimed to identify profiles of self-compassion in cancer patients and examined the associations of self-compassion profiles with sociodemographic and medical variables and psychological outcomes. METHODS: This cross-sectional study included 289 patients with heterogeneous cancer types recruited from two hospitals in Xi'an, China. Latent profile analysis was used to identify distinct profiles of self-compassion. The Bolck-Croon-Hagenaars approach was used to examine how these profiles related to sociodemographic and medical characteristics and psychological outcomes. RESULTS: Five profiles of self-compassion were identified: 'average self-compassion' (54%), 'high self-compassion' (19.4%), 'low self-compassion and low self-coldness' (11.4%), 'high self-compassion and high self-coldness' (8%), and 'average self-compassion and high self-coldness' (7.2%). Patients with the 'high self-compassion' profile tended to be older and report no cancer recurrence, and those with the 'low self-compassion and low self-coldness' profile tended to be female. Patients with the 'high self-compassion' profile reported the fewest depressive and anxiety symptoms while patients with the 'average self-compassion and high self-coldness' profile reported the most depressive and anxiety symptoms. CONCLUSIONS: The study revealed five self-compassion profiles in cancer patients, which had different psychological outcomes. Future longitudinal research should investigate the causality between self-compassion profiles and psychological outcomes.

Self-compassion and fear of cancer recurrence in Chinese breast cancer patients: The mediating role of maladaptive cognitive styles.

OBJECTIVES: Previous studies have examined the benefits of self-compassion for psychological symptoms in breast cancer patients; however, little is known about the role of self-compassion for patients' fear of cancer recurrence (FCR) as well as the underlying mediating mechanisms. This study aimed to examine the effect of self-compassion on FCR, and whether maladaptive cognitive styles mediate this relationship. METHODS: This cross-sectional study included 304 females with breast cancer. A self-report questionnaire was used to assess patients' self-compassion, maladaptive cognitive styles (i.e., rumination and catastrophising), and FCR. Parallel mediation analyses were conducted to examine the research questions. RESULTS: Approximately half of the patients with breast cancer reported elevated levels of FCR. Self-compassion was negatively related to FCR, and the relationship between self-compassion and FCR was mediated by catastrophising, whereas rumination did not significantly mediate the relationship between self-compassion and FCR. CONCLUSIONS: Our findings suggest that self-compassion and catastrophising are closely associated with FCR in patients with breast cancer, and catastrophising is a mediator between self-compassion and FCR. Clinicians could reduce breast cancer patients' FCR by enhancing their self-compassion and improving their maladaptive cognitive styles.

Fear-focused Self-compassion Therapy for young breast cancer patients' fear of cancer recurrence: Study protocol of a randomized controlled trial.

Background: In China, there are a growing number of young women being diagnosed with breast cancer. Fear of Cancer Recurrence (FCR) has become one of the major psychological concerns reported by young breast cancer patients. Yet, there is a lack of psychological intervention tailored for reducing FCR for Chinese young breast cancer patients. In the current study, the Fear-focused Self-compassion Therapy is developed to help Chinese young breast cancer patients to manage FCR. The therapy was developed based on FCR development theories and self-compassion related therapy. The primary objective is to evaluate the short-term and long-term effectiveness of Fear-focused Self-compassion Therapy. The secondary objective is to examine the underlying mechanisms of therapy in reducing FCR in young breast cancer patients. Methods: The Fear-focused Self-compassion Therapy consists of 8-week face to face group sessions. This study will be a randomized controlled trial with 160 Chinese young female breast cancer patients with severe FCR. Participants will be randomized to the therapy group or a usual care control group (1:1). Measurements will be completed at baseline, immediately completing intervention, 3, 6, and 12 months later. Primary outcomes are FCR severity, and secondary outcomes include symptoms of depression and anxiety, satisfaction with therapy, and cost-effectiveness of the therapy. Discussion: If successful, this study will provide an effective psychological intervention to treat FCR for young breast cancer patients in China, and illuminate the underlying mechanisms of the Fear-focused Self-compassion Therapy in reducing FCR. Clinical trial registration: ClinicalTrials.gov: NCT04965428. Registered 23rd July 2021, https://clinicaltrials.gov/ct2/show/NCT04965428?cond=fear+of+cancer+recurrence&draw=2&rank=1.

Suicidal ideation in advanced cancer patients without major depressive disorder.

INTRODUCTION: Major depressive disorder (MDD) is associated with an increased risk of suicide and suicide attempt among cancer patients. However, we do not know how many cancer patients without MDD have suicidal ideation (SI). OBJECTIVES: This study aimed to investigate the prevalence, characteristics and correlated factors of SI among advanced cancer patients without MDD. METHODS: This is a multi-center, cross-sectional study based on an electronic patient-reported outcome systems in patients who were diagnosed with advanced lung, liver, gastric, esophageal, colorectal or breast cancer, the top six prevalent cancers in China. A total of 2930 advanced cancer patients were recruited from 10 regional representative cancer centers across China from August 2019 to December 2020. Patients completed the Patient Health Questionnaire-9 regarding if they had thoughts of being better off dead or of hurting themselves in some way in the previous 2 weeks. Patients also completed the symptom inventory and quality of life assessment. Generalized estimating equation model was performed to explore the correlated factors associated with SI among the patients without MDD. RESULTS: The overall prevalence of SI among advanced cancer patients without MDD was 13.1%. The prevalence was higher in older patients. After adjusted for existing conditions, patients with vomiting symptom (p < 0.001), poorer life quality (p < 0.001), and middle education level (p = 0.031) were correlated factors of SI. CONCLUSIONS: The suicidal ideation is common in advanced cancer patients without MDD. Patients with vomiting, poor quality of life, and middle education level should be screened and monitored for suicidal ideation even without MDD. CLINICAL TRIAL INFORMATION: ChiCTR1900024957.

Unmet needs from the first diagnosis of cancer until the end of medical treatment: A longitudinal study.

OBJECTIVE: This study aimed to examine (1) The courses of Chinese cancer patients' unmet supportive care needs (psychological, physical and daily living, health system and information, patient care and support, and sexual) from the first cancer diagnosis until the end of medical treatment; (2) The predictive role of socio-demographic and medical characteristics (i.e., age, gender, and cancer stage) in the courses of unmet needs; and (3) The associations of courses of unmet needs with courses of depressive and anxiety symptoms. METHODS: A longitudinal study was performed at Shaanxi Provincial Tumour Hospital in Xi'an, China. A total of 153 heterogeneous cancer patients were assessed after the first diagnosis (T1), at the beginning (T2) and the end (T3) of the receipt of medical treatment. Latent growth curve models were used to examine the research questions. RESULTS: Psychological needs and health system and information needs showed a decrease over time, whereas physical needs, patient care needs and sexual needs remained stable. Younger and female patients tended to report higher levels of unmet psychological needs at T1 and experienced slower decreases from T1 to T3. Only the courses of unmet psychological needs were associated with the courses of depressive and anxiety symptoms from T1 to T3. CONCLUSIONS: More attention can be given to young and female cancer patients, as they were more likely to suffer from high unmet psychological needs over the disease trajectory. Future research may focus more on addressing unmet needs reported by Chinese cancer patients.

The predictive role of self-compassion in cancer patients' symptoms of depression, anxiety, and fatigue: A longitudinal study.

Objective Self-compassion is consistently found to be related to better psychological outcomes. As most studies were cross-sectional, little is known about the predictive role of self-compassion for future psychological outcomes. This longitudinal study in cancer patients investigated the predictive role of self-compassion at the time of cancer diagnosis for the course of symptoms of depression, anxiety, and fatigue in the period of receiving cancer treatment. METHODS: This longitudinal study was conducted at the Shaanxi Provincial Tumour Hospital in Xi'an, China. A total of 153 heterogeneous cancer patients were assessed within 1 week after cancer diagnosis (T1) as well as at the start (T2) and the end (T3) of medical treatment. Hierarchical linear regression analyses were conducted to examine the research questions. RESULTS: Cross-sectional regression analyses at T1 showed that a self-compassion total score and negative self-compassion (and to a lesser extent positive self-compassion) were significantly related to symptoms of depression, anxiety, and fatigue. When controlling for symptoms at T1, positive self-compassion significantly predicted all three outcomes at T3. A self-compassion total score only predicted symptoms of anxiety at T2, controlling for T1 symptoms. In contrast, we found no significant predictive value of negative self-compassion. CONCLUSIONS: This study suggests that the positive aspects of self-compassion are beneficial for cancer patients for their future functioning, in terms of fewer symptoms of depression, anxiety, and fatigue over time. Future interventions should test how and to what extent self-compassion can be cultivated and whether increases in self-compassion are associated with better outcomes.

Psychometric properties of the Depression Stigma Scale (DSS) in Chinese cancer patients: a cross-sectional study.

OBJECTIVES: The Depression Stigma Scale (DSS) is commonly used to assess depression stigma in the general population and in people with depression. The DSS includes two 9-item subscales assumed to measure personal depression stigma (ie, personal perceptions of depression) and perceived depression stigma (ie, perceptions of how others perceive depression). The aim of the present study was to examine its psychometric properties in terms of validity and reliability in Chinese cancer patients. DESIGN: A cross-sectional study design. PARTICIPANTS AND SETTINGS: This study focused on 301 Chinese cancer patients recruited from two hospitals in Xi'an, China. METHODS: Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used to assess the factor structure. Internal consistency was assessed using Cronbach's alpha. To examine concurrent validity, symptoms of depression were used as the criterion. RESULTS: For each subscale of the DSS (ie, personal and perceived depression stigma), the EFA and CFA confirmed a two-factor structure: weak-not-sick (ie, perceiving that depression is not a real illness, but rather a sign of weakness) and discrimination (ie, perceiving that depressed people are discriminated against). The Cronbach's alphas were adequate, ranging from 0.70 to 0.80. Symptoms of depression were positively but weakly correlated to personal and perceived depression stigma. CONCLUSIONS: The DSS appeared to show satisfactory psychometric properties in our sample of cancer patients. Both personal depression stigma and perceived depression stigma subscales consisted of two underlying aspects.

Patterns of unmet supportive needs and relationship to quality of life in Chinese cancer patients.

OBJECTIVE: This study aimed to (1) identify distinct patterns of unmet needs in Chinese cancer patients; (2) examine whether sociodemographic and medical characteristics distinguished these patterns; and (3) examine whether people with distinct patterns reported differential quality of life (QoL). METHODS: This cross-sectional study recruited 301 cancer patients from 2 hospitals in China. The 34-item Supportive Care Needs Survey Short-Form was used to measure unmet needs across 5 domains: physical and daily living, psychological, patient care and support, health systems and information, and sexuality. Latent class analysis was performed to identify patterns of unmet needs across these domains. RESULTS: Four patterns of unmet needs were identified, differing in levels and nature of unmet needs. Participants in class 1 (47%) reported few unmet needs. Patients in class 2 (15%) had moderate levels of unmet needs, displaying similar levels across 5 domains. People in class 3 (25%) and class 4 (13%) reported similarly high levels on "psychological," "health care system and information," "physical and daily living," and "patient care," but differing in "sexuality," with class 3 reporting low levels while class 4 high on "sexuality." None of sociodemographic and medical characteristics distinguished these patterns significantly. Compared to other classes, people in class 1 reported highest levels of QoL. CONCLUSIONS: This study demonstrates the existence of 4 patterns of unmet supportive needs in Chinese cancer patients. Patients with few unmet needs reported the best QoL.

Over-expression of CircRNA_100876 in non-small cell lung cancer and its prognostic value.

Circular RNAs (circRNAs) are a novel type of endogenous RNAs featuring stable structure and high tissue-specific expression. Recently, accumulating evidence has revealed that aberrant circRNAs expression plays important roles in carcinogenesis and tumor progression. However, the expression pattern and biological function of circRNAs in non small cell lung cancer (NSCLC) remain largely unknown. Therefore, the purpose of this study was to clarify the possible role of one of typical circRNAs, circRNA_100876 in NSCLC and to define its prognostic value in NSCLC. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the expression of circRNA_100876 in tumor tissues and their adjacent nontumorous tissues in 101 patients with NSCLC. We found that the expression level of circRNA_100876 was significantly elevated in NSCLC tissues when compared with their adjacent nontumorous tissues (P=0.000). Moreover, there was a close correlation between the circRNA_100876 up-regulation expression and lymph node metastasis (P=0.001) and tumor staging (P=0.001) in NSCLC. In addition, Kaplan-Meier survival analysis demonstrated that the overall survival time of NSCLC patients with high circRNA_100876 expression was significantly shorter than those patients with low circRNA_100876 expression (P=0.000). In conclusion, our findings indicate that circRNA_100876 is closely related to the carcinogenesis of NSCLC and it might be served as a potential prognostic biomarker and therapeutic target for NSCLC.

ABCB5-ZEB1 Axis Promotes Invasion and Metastasis in Breast Cancer Cells.

ABCB5 belongs to the ATP-binding cassette (ABC) superfamily, which is recognized for playing a role in the failure of chemotherapy. ABCB5 has also been found to be overexpressed at the transcriptional level in a number of cancer subtypes, including breast cancer. However, the exact mechanism ABCB5 uses on cancer cell metastasis is still unclear. In the present study, we demonstrate that ABCB5 expression was increased in metastatic tissues when compared with nonmetastatic tissues. ABCB5 can significantly enhance metastasis and epithelial-mesenchymal transition (EMT), while knockdown of ABCB5 inhibited these processes. Microarray analysis indicated that ZEB1 may function as a downstream factor of ABCB5. Furthermore, the expression of ZEB1 in tissues is positively relevant to ABCB5 in breast cancer. Knocking down ZEB1 inhibits ABCB5 ectopic expression-induced migration and invasion, as well as EMT. Taken together, these results helped to realize the oncogene functions of ABCB5 in breast cancer cells and provided a new direction in treating breast cancer.

Tripartite motif 16 suppresses breast cancer stem cell properties through regulation of Gli-1 degradation via the ubiquitin-proteasome pathway.

Cancer stem cells (CSCs) are responsible for cancer progression and patient prognosis. Tripartite motif 16 (TRIM16) is a proteasome coactivator that regulates proteolytic activity in eukaryotic cells. Abundant evidence has shown that TRIM16 is lowly expressed in a number of human carcinomas. In a previous study, we demonstrated that TRIM16 suppressed cancer malignancy and that TRIM16 expression levels were associated with favorable prognostic parameters of patients with cancer. However, the precise role of this motif in the pathogenesis of breast cancer remains unknown. In the present study, we examined 29 human breast cancer specimens, and found that TRIM16 was lowly expressed in breast cancers; thus, TRIM16 expression is negatively correlated with metastasis in breast cancer patients. Moreover, we showed that TRIM16 suppressed CSC properties in a population of breast cancer cells. TRIM16 depletion resulted in an increased proportion of CSCs relative to breast cancer cells when several assays were used to assess CSC properties. Finally, we demonstrated that TRIM16 directly regulated the degradation of Gli­1 protein via the ubiquitin­proteasome pathway. In conclusion, we propose that inhibition of CSC properties may be one of the functions of TRIM16 as a suppressor of breast cancer progression.

Fungal Growth and Manganese Peroxidase Production in a Deep Tray Solid-State Bioreactor, and In Vitro Decolorization of Poly R-478 by MnP.

The growth of Irpex lacteus F17 and manganese peroxidase (MnP) production in a selfdesigned tray bioreactor, operating in solid-state conditions at a laboratory scale, were studied. The bioreactor was divided into three layers by three perforated trays. Agroindustrial residues were used both as the carrier of bound mycelia and as a nutrient medium for the growth of I. lacteus F17. The maximum biomass production in the bioreactor was detected at 60 h of fermentation, which was consistent with the CO2 releasing rate by the fungus. During the stationary phase of fungal growth, the maximum MnP activity was observed, reaching 950 U/l at 84 h. Scanning electron microscopy images clearly showed the growth situation of mycelia on the support matrix. Furthermore, the MnP produced by I. lacteus F17 in the bioreactor was isolated and purified, and the internal peptide sequences were also identified with mass spectrometry. The optimal activity of the enzyme was detected at pH 7 and 25 °C, with a long half-life time of 9 days. In addition, the MnP exhibited significant stability within a broad pH range of 4-7 and at temperature up to 55 °C. Besides this, the MnP showed the ability to decolorize the polymeric model dye Poly R-478 in vitro.