calcitriol and Fibrosarcoma

We report two infants with infantile fibrosarcoma (IFS) complicated by severe hypercalcemia. Assessment demonstrated suppressed parathyroid hormone and 1,25-dihydroxyvitamin D levels with elevated circulating levels of parathyroid hormone related protein, indicating the diagnosis of humoral hypercalcemia of malignancy (HHM). HHM is a paraneoplastic syndrome rarely associated with pediatric malignancies. Hypercalcemia manifested clinically with neurologic symptoms and soft tissue calcium deposition and required aggressive management with intravenous fluids, diuretics, and supplemental electrolytes. Following treatment with neoadjuvant chemotherapy, serum calcium levels precipitously declined requiring calcium repletion. These cases highlight the improvement of hypercalcemia secondary to HHM following chemotherapy.

Topics: Calcium; Female; Fibrosarcoma; Humans; Hypercalcemia; Infant, Newborn; Male; Neoadjuvant Therapy; Paraneoplastic Syndromes; Parathyroid Hormone; Vitamin D

Principal rotenoids (deguelin, tephrosin, rotenone, and 12a-hydroxyrotenone) (3-30microM) isolated from the stems of Erycibe expansa significantly inhibited invasion of human fibrosarcoma HT1080 cells through Matrigel-coated filters and release of proMMPs-2 and 9. In addition, deguelin and tephrosin showed differentiation-inducing activity in human promyelocytic leukemia HL-60 cells. Furthermore, effects of various constituents isolated from the ethyl acetate-soluble fraction on proliferation of human leukemia U937 cells were examined. As a result, most of isoflavones and several flavans as well as rotenoids showed moderate or substantial anti-proliferative activities.

Topics: Cell Differentiation; Cell Proliferation; Convolvulaceae; Enzyme Precursors; Fibrosarcoma; Flavonoids; Gelatinases; HL-60 Cells; Humans; Matrix Metalloproteinase 9; Metalloendopeptidases; Neoplasm Invasiveness; Plant Extracts; Rotenone; Tumor Cells, Cultured; U937 Cells