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Biomedical subjects

D Bron

Publications and source records attributed to D Bron.

100 records · Page 6Linked to original sources

Total parenteral nutrition-induced cholestasis mimicking large bile duct obstruction.

The authors present a case of cholestatic jaundice which developed during total parenteral nutrition. The histology of the liver mimicked the picture of large bile duct obstruction. However, there was no duct obstruction and the symptoms regressed after the caloric input was reduced. At postmortem examination, the portal inflammatory infiltrate had cleared and was replaced by fibrosis. Alterations in bile chemistry could be responsible for the similarity between the lesions induced by parenteral feeding and those classically described in large bile duct obstruction.

Biopsy↗

Scientific basis and criticism of current therapy of acute leukemia.

The factors which are thought to determine the response of acute leukemia (AL) to therapy are: 1) tumor size 2) drug dose 3) sensitivity to drug, 4) scheduling of drugs and 5) suppression of normal hemopoiesis. Each of these factors is considered in terms of the scientific data supporting their importance. Inability to measure the size of the tumor mass during all phases of treated AL continues to weaken rational strategies for therapy especially maintenance chemotherapy. Increasing the drug dose improves cell kill and potentially the cure rate up to the limits of toxicity. These limits may be extended by bone marrow transplantation. Various systems to study the drug sensitivity of leukemic cells are in experimental use, including stem cell assays but as yet they do not give a guide to altering therapy. The scheduling of multiple drugs is designed to increase cell kill by recruitment into the cycle, but "sanctuaries" appear to exist for resting cells. The suppression of normal hemopoiesis apparently due to leukemia-associated inhibitors is associated with favorable prognosis in childhood ALL but use of this information to improve treatment protocols is still unclear.

Acute Disease↗

Suppressor cell induction and reticuloendothelial cells activation produced in the mouse by beta 1-3 glucan.

We made a sequential study of the proliferative and functional changes occurring in RE cells after beta 1-3 glucan administration in BDF1, and C57BL mouse. beta 1-3 glucan was administered by single i.v. 50 mg/kg or i.p. 15 mg/kg injection. This successively induced changes in RE cells as follows: on day 3 a rise of acid phosphatase activity in peritoneal macrophages; on day 6 an increase of 3H-TdR incorporation in spleen and peritoneal lymphocytes together with an intense suppression of PHA and LPS responses by spleen cells; on day 10 a 5-fold increase of the percentage of peroxidase rich monocytes in the peritoneum. Thereafter all the values went back to or below control. Our results indicate that beta 1-3 glucan is an in vivo mitogen and a macrophage activator.

Animals↗

Clinical studies with a THC analog (BRL-4664) in the prevention of cisplatin-induced vomiting.

BRL-4664, a THC analog, has been administered to 23 patients at a dose of 10 or 15 mg repeated twice. All patients were on cisplatin therapy, and 16 of them had experienced severe vomiting during the previous course of cisplatin. There was a statistically significant difference between the group with prior cisplatin therapy and without prior therapy in terms of number of vomiting episodes, emphasizing the role of conditioned reflexes. The dose of 15 mg administered before and twice after the infusion of cisplatin was well tolerated. Only minor side effects were observed.

Antiemetics↗

The effect of Epoetin alfa on quality of life in anemic cancer patients.

OBJECTIVES: The purpose of this paper is to review evidence on the use of Epoetin alfa in the treatment of anemia associated with cancer treatment through a discussion of clinical and quality-of-life considerations. MATERIALS AND METHODS: Cancer patients often experience fatigue, which leads to reduced quality of life. There are few effective treatments available to manage this potentially debilitating symptom, which can lead clinicians to become discouraged about treating fatigue. When cancer-related fatigue is due to anemia, there are viable treatment options. This paper reviews the current management of anemia in cancer patients, with an emphasis on the use of recombinant human erythropoietin (Epoetin alfa). CONCLUSIONS: Anemia can contribute to the reduced quality of life experienced by cancer patients. Blood transfusion, the traditional method of treating anemia, is effective and relatively inexpensive, but is associated with certain risks and is subject to limitations in blood supply. Epoetin alfa therapy provides healthcare providers with an effective alternative to blood transfusion, and trial results suggest that this intervention has a positive effect on patients' quality of life. The optimal starting and stopping points for therapy have not yet been determined. In practice, many physicians begin treatment when hemoglobin levels drop below 10 g/dL and stop when they rise above 13 g/dL, with a 75% dose reduction until completion of chemotherapy if hemoglobin again drops below 12 g/dL. Nonresponse (< 1 g/dL rise in hemoglobin) is met with dose increase at 4 weeks and discontinuation after 8 weeks. Controlled studies comparing anemia management via transfusion to the use of Epoetin alfa have not been done to date. Therefore, the relative cost-effectiveness of Epoetin alfa, an effective but expensive intervention, remains unknown.

Anemia↗