Biotransformation and reduction of estrogenicity of bisphenol A by the biphenyl-degrading Cupriavidus basilensis.

The biphenyl-degrading Gram-negative bacterium Cupriavidus basilensis (formerly Ralstonia sp.) SBUG 290 uses various aromatic compounds as carbon and energy sources and has a high capacity to transform bisphenol A (BPA), which is a hormonally active substance structurally related to biphenyl. Biphenyl-grown cells initially hydroxylated BPA and converted it to four additional products by using three different transformation pathways: (a) formation of multiple hydroxylated BPA, (b) ring fission, and (c) transamination followed by acetylation or dimerization. Products of the ring fission pathway were non-toxic and all five products exhibited a significantly reduced estrogenic activity compared to BPA. Cell cultivation with phenol and especially in nutrient broth (NB) resulted in a reduced biotransformation rate and lower product quantities, and NB-grown cells did not produce all five products in detectable amounts. Thus, the question arose whether enzymes of the biphenyl degradation pathway are involved in the transformation of BPA and was addressed by proteomic analyses.

Life-Limiting Conditions at a University Pediatric Tertiary Care Center: A Cross-Sectional Study.

BACKGROUND: The increasing number of children with life-threatening and life-limiting conditions requires an individualized approach and additional supportive care in hospitals. However, these patients' characteristics and their prevalence in a pediatric tertiary hospital setting have not been systematically analyzed. OBJECTIVE: This study aimed to determine the proportion of hospitalized children who are receiving care for life-threatening diseases with feasible curative treatments and for life-limiting diseases (LLDs) with inevitable premature death as opposed to care for acute or chronic diseases; additionally, it sought to compare patient characteristics, clinical features, and symptoms within these subgroups. DESIGN/SETTING/SUBJECTS: A cross-sectional survey of 208 patients was conducted at a large tertiary pediatric care center through standardized interviews with the responsible medical teams. Patient subgroups were defined as those with acute, chronic, life-threatening, or LLDs. RESULTS: The comparisons of patient subgroups showed distinct differences and revealed that nearly half of all inpatients suffer from life-threatening (20%) or LLDs (27%), with a high proportion of rare diseases (82%). They experienced a high burden of symptoms in all parameters of clinical features, including high demand for medications and nursing care. CONCLUSION: A substantial proportion of pediatric inpatients suffered from life-threatening or LLDs, as well as rare diseases, indicating a high burden of symptoms and a high need for additional care. The results suggest a substantial need to implement pediatric palliative care structures in tertiary care centers for patients in critical and terminal conditions.