A Novel Transgenic Model to Study Thyroid Axis Activity in Early Life Stage Medaka.

Identifying endocrine disrupting chemicals in order to limit their usage is a priority and required according to the European Regulation. There are no Organization for Economic Co-operation and Development (OECD) test guidelines based on fish available for the detection of Thyroid axis Active Chemicals (TACs). This study aimed to fill this gap by developing an assay at eleuthero-embryonic life stages in a novel medaka (Oryzias latipes) transgenic line. This transgenic line expresses green fluorescent protein (GFP) in thyrocytes, under the control of the medaka thyroglobulin gene promoter. The fluorescence expressed in the thyrocytes is inversely proportional to the thyroid axis activity. When exposed for 72 h to activators (triiodothyronine (T3) and thyroxine (T4)) or inhibitors (6-N-propylthiouracil (PTU), Tetrabromobisphenol A (TBBPA)) of the thyroid axis, the thyrocytes can change their size and express lower or higher levels of fluorescence, respectively. This reflects the regulation of thyroglobulin by the negative feedback loop of the Hypothalamic-Pituitary-Thyroid axis. T3, T4, PTU, and TBBPA induced fluorescence changes with the lowest observable effect concentrations (LOECs) of 5 µg/L, 1 µg/L, 8 mg/L, and 5 mg/L, respectively. This promising tool could be used as a rapid screening assay and also to help decipher the mechanisms by which TACs can disrupt the thyroid axis in medaka.

Participation preferences of health service users in health care decision-making regarding rehabilitative care in Germany-A cross-sectional study.

BACKGROUND: Involving patients and citizens in health care decision-making is considered increasingly important in Germany. Participatory structures have been implemented, especially in rehabilitative care. However, it is unknown whether and to what extent German patients and citizens want to participate in decisions that exceed their own medical treatment. OBJECTIVE: This study aimed to survey participation preferences and associated factors of health service users in decisions regarding rehabilitative care at micro, meso and macro levels. METHODS: A questionnaire was sent to 3872 former rehabilitants. We collected participation preferences using the Control Preference Scale or an adapted form. Possible influencing factors were examined using logistic regression models. RESULTS: The response rate was 5.7% (n = 217). At all decision-making levels, joint decision-making was preferred. At the macro level, preferences for actively participating were the highest. Preferences were significantly interrelated between decision-making levels. At the micro level, an orthopaedic indication significantly decreased the desire for participation compared to psychosomatic indications (odds ratio = 0.44, p = .019). DISCUSSION: Participants wanted to be equally involved in decision-making as experts. Higher preferences for active participation at the macro level might be due to dissatisfaction with the current health care organisation and lack of trust in politicians. Compared to the general public, our study sample was older (73.3% between 50 and 69 years) and more often chronically ill-factors associated with increased participation preferences in the literature. CONCLUSION: Contrary to the identified preferences, participation opportunities in the German health care system are rare. Further research on participation preferences and structures that enable meaningful involvement are needed.