Study on ceramide modulates EAAT-2 participation in the immunoinflammatory response in schizophrenia.

OBJECTIVE: Abnormal immunoinflammatory responses play important roles in the pathogenesis of schizophrenia, but the underlying molecular mechanisms are still unclear. MATERIALS AND METHODS: In this study, the ceramide agonist daunorubicin (DNR) was injected into the lateral ventricles to induce ceramide accumulation. The behavioral tests were used to observe schizophrenia-like behavioral changes. Changes in the mRNA levels of the proinflammatory cytokines and the protein levels of the glutamate transporter excitatory amino acid transporter-2 (EAAT-2) were detected. After inhibition of nuclear factor-κB (NF-κB), the above indices were detected again. Nissl staining was used to assess neuronal damage. RESULTS: After intracerebroventricular injection of DNR, ceramide significantly accumulated in the hippocampus, and behavioral tests revealed negative schizophrenia symptoms accompanied by induced learning and memory dysfunction. Furthermore, the hippocampus demonstrated increased mRNA levels of the proinflammatory cytokines including interleukin-1ß (IL-1ß), IL-6, and tumor necrosis factor-α (TNF-α) and significantly decreased EAAT-2 protein levels. Nissl staining revealed neuronal damage after ceramide accumulation. The NF-κB inhibitor pyrrolidine dithiocarbamate (PDTC) reduced the behavioral abnormalities caused by ceramide accumulation, downregulated CONCLUSIONS: The experimental results suggest that ceramide reduces EAAT-2 expression through the NF-κB/TNF-α pathway and causes neuronal excitotoxicity in the pathogenesis of schizophrenia, leading to neuronal damage.

Quality of life in head and neck cancer survivors at 1 year after treatment: the mediating role of unmet supportive care needs.

PURPOSE: The aim of the study was to test a hypothesised model that supportive care needs (SCNs) have a mediating effect on the relationship between characteristics of (Chinese) head and neck cancer (HNC) survivors and their quality of life (QoL). METHODS: A total of 285 Chinese HNC survivors who had finished cancer treatment 1 year earlier completed a self-reported survey covering demographic and clinical characteristics, the Chinese version of the Short-Form Supportive Care Needs Questionnaire (SCNS-SF34-C), the supplementary module of access to healthcare and ancillary support services and the Functional Assessment of Cancer Therapy for Head and Neck Cancer (FACT-H&N). RESULTS: The final path model showed that optimism, educational level, any coexisting disease, number of somatic symptoms, household income, eating ability, support from others, whether the cancer is under control or not and travelling time from home to hospital have direct or indirect effects, or both, on the QoL of HNC survivors, by way of unmet SCNs in the psychological, physical and/or health system information domains, which account for 64 % of the variance in the total FACT-H&N score. CONCLUSIONS: Our study demonstrated the mediating effects of SCNs in the association between HNC survivors and their QoL. Early needs assessment may help healthcare professionals to identify the actual needs of these survivors, and providing the information that HNC survivors want is a significant factor in meeting their psychological needs and thereby improving their overall QoL.

Perceived unmet supportive care needs and determinants of quality of life among head and neck cancer survivors: a research protocol.

AIM: To describe a study protocol designed to explore the associations among the perceived unmet supportive care needs, quality of life and the demographic and clinical characteristics of head and neck cancer survivors. BACKGROUND: The prognoses for people with head and neck cancer are improving with medical advances. However, studies have reported that such cancer survivors experience poor quality of life. Current studies mainly focus on Western populations and there is limited research investigating the needs of head and neck cancer survivors. DESIGN: A mixed-design method is proposed, which will include two phases. Phase I will use a quantitative cross-sectional design and Phase II a qualitative descriptive approach. METHODS: The participants will be recruited from the outpatient departments of three public hospitals in Hong Kong. In Phase I, a questionnaire will be used to collect demographic and clinical characteristics, supportive care needs, necessary access to various supportive services and quality of life. Semi-structured interviews will be conducted in Phase II. The study is supported by a grant from the Health and Health Services Research Fund, Hong Kong, September 2011. DISCUSSION: The study will generate in-depth information on the needs of head and neck cancer survivors, to help healthcare professionals allocate resources better and develop new services, which can be more person-centred, to meet the needs of the these survivors.

Knowledge and practice among Hong Kong oncology nurses in the management of chemotherapy-induced nausea and vomiting.

PURPOSE: To examine nurses' roles in the prevention and management of chemotherapy-induced nausea and vomiting (CINV), and to identify their related educational needs. METHODS: This was a descriptive cross-sectional study with a self-reported survey completed by 103 oncology nurses caring for and administering chemotherapy to cancer patients in the department of oncology in three Hong Kong public hospitals. The survey was developed to identify key issues pertinent to the role of nurses in managing CINV. Data were collected from the following areas (a) demographics, (b) assessment of CINV, (c) CINV management and (d) barriers and facilitators to good CINV practice. RESULTS: Only a third of respondents performed a CINV assessment before starting chemotherapy, and more than 40% reported that the use of a standardised assessment tool was uncommon. Nearly half recognised that they had inadequate knowledge of different aspects of CINV, but the majority could clearly state the most common pharmacological agents used to treat chemotherapy-induced nausea (88.3%) and vomiting (87.4%). The barriers respondents most frequently encountered in CINV prevention and management were lack of time and a heavy workload. Adopting a standardised CINV assessment tool and management protocol together with further professional training were identified as the major facilitators in improving CINV prevention and management. CONCLUSIONS: Respondents perceived their knowledge of CINV prevention and management as inadequate. There is a need to adopt a standardised assessment tool, to develop a management protocol and to introduce further professional training to meet the expanding needs of both patients and nurses.

Anxiety, depression and quality of life among Chinese breast cancer patients during adjuvant therapy.

PURPOSE: The aim of the study was to examine anxiety and depression and their effects on the quality of life (QOL) of patients with breast cancer undergoing chemotherapy or radiotherapy. METHODS: A cross-sectional descriptive design was used. Data were collected from a self-report survey derived from the Hospital Anxiety and Depression Scale (HADS)-Cantonese/Chinese version, the Functional Assessment of Cancer Therapy for Breast Cancer (FACT-B)-Chinese version, and from demographic and clinical characteristics. Chi-square tests and the General Linear Model (GLM) were used for secondary data analysis. SAMPLE: The study group consisted of 218 women (> or = 18 years old) who were midway through chemotherapy or radiotherapy for stage I-III breast cancer. All subjects were recruited from the outpatient sections of the Departments of Clinical Oncology or Breast Centers of the four Hong Kong public hospitals. RESULTS: The percentage of participants with anxiety (chi2=6.56, p=0.01) or depression (chi2=7.26, p=0.007) was higher in the chemotherapy group. More participants in the chemotherapy group had both anxiety and depression than those in the radiotherapy group, though no statistically significant difference was reported. Anxiety and depression had detrimental effects on the overall and other domains of QOL of these women undergoing adjuvant therapy for breast cancer. CONCLUSION: This study should increase nurses' awareness of the importance of integrating psychological symptom assessment into nursing assessment procedures, and enhance their clinical sensitivity in identifying high-risk groups of patients undergoing specific cancer treatments.

Screening for colorectal cancer using a quantitative immunochemical faecal occult blood test: a feasibility study in an Asian population.

BACKGROUND: The quantitative immunochemical faecal occult blood test (qFOBT) has been shown to be an accurate method of identifying significant colorectal neoplasia including cancer and advanced adenomas. This study reports the results of a Singapore population-based colorectal cancer screening event using the qFOBT. METHODS: This event was held as part of a colorectal cancer awareness exhibition. All asymptomatic individuals above the age of 40 years with no previous colorectal cancer screening in the last 1 year were invited to participate. Eligible participants were screened using two consecutive qFOBTs with a positive faecal haemoglobin threshold taken at 100 ng/mL. Participants with at least one positive qFOBT result were recalled and advised to undergo colonoscopy. Endoscopic polypectomy or surgery was performed according to colonoscopic findings. RESULTS: A total of 751 (55% male, 45% female) participants with a median age of 53 years (range, 40-85 years) took part in the screening event. Five hundred and forty (72%) participants returned the qFOBT samples, of which 57 (11%) tested positive. Fifty-two of these participants proceeded to colonoscopy. Three participants had sigmoid cancer and 12 had advanced polyps, all of which were located distally in the sigmoid colon or rectum. Five of the participants required surgery for colorectal neoplasia and all recovered well without complications. CONCLUSION: The qFOBT at a positive faecal haemoglobin threshold of 100 ng/ml has a high positive predictive value and is an effective screening tool for colorectal cancer in an Asian population.

The symptom cluster of fatigue, pain, anxiety, and depression and the effect on the quality of life of women receiving treatment for breast cancer: a multicenter study.

PURPOSE/OBJECTIVES: To examine the symptom cluster of fatigue, pain, anxiety, and depression and its effect on the quality of life (QOL) of women receiving chemotherapy or radiotherapy for breast cancer. DESIGN: Descriptive. SETTING: Oncology outpatient sections of four public hospitals in Hong Kong. SAMPLE: 215 ethnic Chinese women who were midway through treatment for breast cancer. METHODS: Chinese versions of the Brief Fatigue Inventory, Hospital Anxiety and Depression Scale, Brief Pain Inventory, Functional Assessment of Chronic Illness Therapy for Breast Cancer, and Medical Outcomes Study Social Support Survey were used. Spearman rho correlation and structural equation modeling were used to examine the relationships among the study variables. MAIN RESEARCH VARIABLES: Breast cancer, fatigue, pain, anxiety, depression, and QOL. FINDINGS: Most participants reported mild-to-moderate levels of fatigue and pain. Twenty-one percent and 36% of patients might have had an anxiety or depression disorder, respectively. Significant correlations among the four symptoms supported the existence of the symptom cluster. The participants receiving chemotherapy had inadequate social support, experienced higher levels of symptoms, and were more likely to have a poorer QOL. CONCLUSIONS: The findings supported the existence of the symptom cluster that had detrimental effects on QOL. IMPLICATIONS FOR NURSING: This study shed light on a contemporary approach of grouping several related symptoms together. The findings enhance nurses' clinical sensitivity when identifying patients in high-risk groups and provide useful information for designing and prioritizing symptom-management strategies to meet patients' needs.

Measuring the symptom experience of Chinese cancer patients: a validation of the Chinese version of the memorial symptom assessment scale.

The purpose of this study was to translate the Memorial Symptom Assessment Scale (MSAS) into Chinese and evaluate the psychometric properties of this version. The original MSAS is a 32-item, patient-rated measure that was developed to assess common cancer-related physical and psychological symptoms with respect to frequency, intensity, and distress. In this study, a two-phase design was used. Phase I involved iterative forward-backward translation, testing of content validity (CVI) and a pretest. Phase II established the psychometric properties of the Chinese version MSAS (MSAS-Ch). Results showed that the MSAS-Ch achieved content relevancy CVI of 0.94 and semantic equivalence CVI of 0.94. Pretesting was performed in 10 cancer patients, and the results revealed adequate content coverage and comprehensibility of the MSAS-Ch. A convenience sample of 370 patients undergoing cancer therapy or at the early post-treatment stage was recruited for psychometric evaluation. Confirmatory factor analysis confirmed the construct validity of the MSAS-Ch, with a good fit between the factor structure of the original version and our present sample data (goodness-of-fit indices all above 0.95). The internal consistency reliability of subscales and total MSAS-Ch was moderately high, with Cronbach alpha coefficients ranging from 0.79 to 0.87. The test-retest intraclass correlation results for the subscale and total MSAS-Ch ranged from 0.68 to 0.79. The subscale scores of MSAS-Ch were moderately correlated with the scores on various validation measurements that assessed psychological distress, pain, and health-related quality of life (r = 0.46-0.65, P < 0.01), confirming that they were measurements of similar constructs. The validity of the construct validity was also supported by comparing the MSAS-Ch scores for subpopulations that varied clinically. Inpatients and patients with poorer performance status scored higher on the MSAS-Ch subscale and total scores than outpatients and patients with higher performance status (P < 0.05). Our study shows that the MSAS-Ch has adequate psychometric properties of validity and reliability, and can be used to assess symptoms during cancer therapy and at the early post-treatment stage in Chinese-speaking patients.