Metal-Organic Framework Mediated Radio-Enhancement Assessed in High-Throughput-Compatible 3D Tumor Spheroid Co-Cultures.

Inorganic nanomaterials have gained increasing attention in radiation oncology, owing to their radiation therapy enhancing properties. To accelerate candidate material selection and overcome the disconnect between conventional 2D cell culture and in vivo findings, screening platforms unifying high-throughput with physiologically relevant endpoint analysis based on 3D in vitro models are promising. Here, a 3D tumor spheroid co-culture model based on cancerous and healthy human cells is presented for the concurrent assessment of radio-enhancement efficacy, toxicity, and intratissural biodistribution with full ultrastructural context of radioenhancer candidate materials. Its potential for rapid candidate materials screening is showcased based on the example of nano-sized metal-organic frameworks (nMOFs) and direct benchmarking against gold nanoparticles (the current "gold standard"). Dose enhancement factors (DEFs) ranging between 1.4 and 1.8 are measured for Hf-, Ti-, TiZr-, and Au-based materials in 3D tissues and are overall lower than in 2D cell cultures, where DEF values exceeding 2 are found. In summary, the presented co-cultured tumor spheroid-healthy fibroblast model with tissue-like characteristics may serve as high-throughput platform enabling rapid, cell line-specific endpoint analysis for therapeutic efficacy and toxicity assessment, as well as accelerated radio-enhancer candidate screening.

Gender differences in caregiver burden and its determinants in family members of terminally ill cancer patients.

OBJECTIVE: Female family caregivers consistently report higher levels of stress and burden compared to male caregivers. Explanations for the apparently higher psychological vulnerability of female caregivers are largely missing to date. This study assesses the correlates and determinants of caregiver burden in family caregivers of advanced cancer patients with a specific focus on gender differences. METHODS: Three hundred and eight self-identified main informal caregivers of advanced cancer patients were cross-sectionally assessed using structured questionnaires for caregiver burden and hypothesised determinants of burden, including sociodemographic characteristics, caring arrangements, support needs, hope and coping style. Gender differences and predictors of burden were assessed using t-tests, chi-squared tests and univariate linear regression. Significant univariate predictors were entered in an analysis of covariance separately for men and women. RESULTS: Burden was significantly higher in women. Hope was the most significant protective factor against burden in both genders, together with perceived fulfilment of support needs. Only in women emotion-oriented coping and being in employment while caring were significantly predictive of higher burden in the multivariate analysis. The model explained 36% of the variance in burden in men and 29% in women. CONCLUSION: Psychological support interventions for family caregivers should take gender-specific risk factors into account. Interventions focusing on keeping up hope while caring for a terminally ill family member may be a valuable addition to palliative services to improve support for family carers. Women may benefit from interventions that address adaptive coping and strategies to deal with the dual demands of employment and caring. Copyright © 2015 John Wiley & Sons, Ltd. Copyright © 2015 John Wiley & Sons, Ltd.

Validation of the Family Inventory of Needs (FIN) for family caregivers in palliative care.

OBJECTIVE: Caregivers of cancer patients are faced with significant demands that can seriously impact their physical and mental health. It is important for healthcare professionals to be aware of caregivers' support needs in order for these to be adequately addressed. Our study develops a German version of the Family Inventory of Needs (FIN) and provides a comprehensive evaluation of its acceptability and psychometric properties. METHOD: Cross-sectional data from 308 participants were taken from the baseline assessment of an ongoing prospective study. Retests were completed by 46 participants approximately one week after baseline. Informal caregivers of terminally ill cancer patients were recruited from three hospitals in Vienna. Questionnaires for hope (IHS), traumatic stress (IES-R), and depression and anxiety (HADS) were employed together with the translated FIN to assess concurrent and discriminant validity. RESULTS: The internal consistency of FIN-Importance had a Cronbach's α of 0.94, and that for FIN-Fulfillment was α = 0.96. Retest reliability for FIN-Importance was r = 0.97, while that for FIN-Fulfillment could not be calculated due to missing responses to this subscale. Concurrent and discriminant validity tests for the scale and the discriminative power of items were adequate. However, missing responses may limit the feasibility of using this scale in research settings. We identified six questions that could be excluded from the scale in order to increase its acceptability and further improve its psychometric properties. SIGNIFICANCE OF RESULTS: Our results suggest that the FIN is suitable for clinical settings. For use in research, we suggest four adaptations to increase the scale's acceptability and psychometric properties. The FIN can be a valuable tool for informing the emotional, physical, and psychological support provided to family carers of people who are terminally ill with cancer.

Validation of the "Quality of Life in Life-Threatening Illness--Family Carer Version" (QOLLTI-F) in German-speaking carers of advanced cancer patients.

BACKGROUND: Palliative care is a multidisciplinary approach that focuses on the improvement of quality of life (QOL) of patients as well as their families. QOL research in palliative care has so far primarily focused on patients, but interest in the QOL of their relatives is increasing. For instruments measuring QOL in relatives, data on psychometric properties are often limited, and so far, none has been available in German. OBJECTIVE: This study translates and validates the "Quality of Life in Life-Threatening Illness-Family Carer Version" (QOLLTI-F) in German-speaking carers of advanced cancer patients. METHODS: The QOLLTI-F was translated from English into German according to the World Health Organisation's recommendations and validated in informal caregivers of terminally ill cancer patients of three Viennese hospitals. Hope was measured to assess concurrent validity; traumatic stress, anxiety, depression and subjective burden were measured to assess discriminant validity. Internal consistency, test-retest reliability and discriminative power were established. The scale's factor structure was explored using a set of factor analyses. RESULTS: Of the 308 caregivers participating in the study, 42 completed the QOLLTI-F retest after a mean of 5 days. The internal consistency was α = 0.85 for the overall scale, Pearson correlation between test and retest lay at r = 0.92. As expected, a significant positive correlation was found with hope (r = 0.40) and significant negative correlations with traumatic stress (r = -0.41), depression (r = -0.51), anxiety (r = -0.52) and overall subjective burden (r = -0.55). The original seven-factor structure was not reproduced, but the scale showed a stable four-factor structure with factors capturing (1) feelings about carers' own life, (2) professional care, (3) interaction with the patient and others and (3) carers' outlook on life. CONCLUSION: This study provides a sound translation and validation of the first QOL assessment tool for caregivers of palliative care patients in German. It also adds to the knowledge on the scale's psychometric properties, which prove to be highly satisfactory. The QOLLTI-F may serve as an outcome measure in palliative care practice, clinical trials and epidemiological research.