Search results for "ASAT"
showing 10 items of 96 documents
Solvates of Dasatinib: Diversity and Isostructurality
2015
A series of dasatinib crystalline forms were obtained, and a hierarchical cluster analysis of their powder X-ray diffraction patterns was performed. The resulting dendrogram implies 3 structural groups. The crystal structures of several solvates representing 2 of these groups were determined. The crystal structure analysis confirms the isostructurality of solvates within structural group I and suggests a correlation between solvent molecule size and trends in crystal structures within this group. In addition, the formation relationships in 2-solvent media between different dasatinib solvate groups were determined. The formation preference of solvates was found to follow the ranking group I …
Rectal perforation during defecography: extraluminal barium impaction removed by TEM (Transanal Endoscopic Microsurgery).
2016
Defecography is the standard diagnostic technique for the diagnosis of functional disorders of the posterior pelvic compartment. However it has some limits as radiation exposure, low-contrast resolution, some degrees of embarrassment and discomfort for the patients. Furthermore it often fails to directly visualize the changes that affect the pararectal space. Here we present a never described case of rectal perforation after defecography with barium impaction removed by TEM (Transanal Endoscopic Microsurgery).We present a case of a 50 years old woman with extraluminal barium impaction due to perforation occurred during defecography. Both pelvic MR and endoanal ultrasound confirmed the prese…
Neurogenic Inflammation in Complex Regional Pain Syndrome (CRPS)
2008
This chapter explains symptoms and nature of neurogenic inflammation and its importance in posttraumatic complex regional pain syndrome (CRPS). Neurogenic inflammation regularly accompanies excitation of primary afferent nociceptors. It has two major components – plasma extravasation and vasodilatation. The most important mediators are the neuropeptides calcitonin gene-related peptide (CGRP) and substance P (SP). After peripheral trauma, immune reaction (e.g., cytokines) and the attempts of the tissue to regenerate (e.g., growth factors) sensitize nociceptors and thereby amplify neurogenic inflammation. This cascade of events has recently been demonstrated in rat models of CRPS employing di…
Imatinib compared with interferon and low-dose cytarabine for newly diagnosed chronic-phase chronic myeloid leukemia.
2003
Imatinib, a selective inhibitor of the BCR-ABL tyrosine kinase, produces high response rates in patients with chronic-phase chronic myeloid leukemia (CML) who have had no response to interferon alfa. We compared the efficacy of imatinib with that of interferon alfa combined with low-dose cytarabine in newly diagnosed chronic-phase CML.We randomly assigned 1106 patients to receive imatinib (553 patients) or interferon alfa plus low-dose cytarabine (553 patients). Crossover to the alternative group was allowed if stringent criteria defining treatment failure or intolerance were met. Patients were evaluated for hematologic and cytogenetic responses, toxic effects, and rates of progression.Afte…
The safety and efficacy of dasatinib plus nivolumab in patients with previously treated chronic myeloid leukemia: results from a phase 1b dose-escala…
2021
Although treatment with tyrosine kinase inhibitors (TKIs) has dramatically improved outcomes for the majority of patients with chronic myeloid leukemia (CML), approximately 20–30% will require a ch...
Cardiovascular Damage Induced by Anti-BCR-ABL TKIs
2018
Anti-BCR-ABL TKIs (tyrosine kinase inhibitors) are drugs that inhibit BCR ABL tyrosine. They are used especially in the treatment of hematological cancer and gastrointestinal stromal tumors (GIST). Anti-BCR-ABL TKIs include first (imatinib), second (nilotinib, dasatinib, bosutinib) and third-generation drugs (ponatinib). Especially second- and third-generation drugs can cause cardiovascular complications such as arterial thrombosis, myocardial ischemia, peripheral arterial diseases, QTc prolongation, and pulmonary hypertension. Nilotinib and ponatinib can cause thrombotic arterial events with various mechanisms. Particularly dasatinib can cause pulmonary hypertension. Compared to convention…
Early diagnosis, clinical management, and follow-up of cardiovascular events with ponatinib
2020
Chronic myeloid leukemia (CML) is a myeloproliferative disorder characterized by neoplastic transformation of pluripotent cells due to a typical cytogenetic and molecular mutation known as Philadelphia (Ph) chromosome. In 2001, the introduction of the tyrosine kinasis inhibitor (TKI) imatinib as a therapeutic strategy for CML with PH chromosome mutation represented an important step towards treatment of these patients, and nowadays, this drug represents the gold therapeutic standard in this clinical setting. A second generation of TKIs (dasatinib, nilotinib, and bosutinib) showed an effective action in all patients with mutations resistant to imatinib. Ponatinib is a third-generation TKI an…
Pleuropulmonary Changes Induced by Drugs in Patients with Hematologic Diseases
2010
Patients with hematologic diseases who are being treated with therapy drugs, or receive radiation therapy or blood transfusions may develop a host of potentially fatal infectious and noninfectious pulmonary complications [1]. The increased complexity of multimodality and high-dose treatment regimens with the intended benefit of augmented antineoplastic efficacy and prolonged disease-free survival, the use of a panel of novel drugs to treat malignant and nonmalignant hematologic conditions (e.g., azacytidine, bortezomib, cladribine, dasatinib, fludarabine, imatinib, lenalidomide, rituximab, and thalidomide), total body irradiation (TBI) and hematopietic stem cell transplantation (HSCT) have …
Outcome of patients with CML treated with dasatinib or nilotinib after failure of second prior TKIs.
2010
Abstract Abstract 2294 Background. The TKIs Nilotinib and Dasatinib offer additional therapeutic options for patients with CML who are resistant or intolerant to Imatinib. These agents, active against the majority of Imatinib resistant BCR-ABL mutated clones, have a different pattern of kinase target selectivity, pharmacokinetics parameters, cell uptake, efflux properties and adverse events profiles. Preliminary results suggest that some patients may respond to a second TKI used as third line therapy, but little is known about the long term benefit of such an approach.Aim of this collaborative Italian study was to verify the response (rate and duration) and the clinical outcome in patients …
Tumour-cell-endothelial interactions: free radicals are mediators of melanoma-induced endothelial cell damage
1996
Damage to vascular endothelium may play an important role during metastasis. We used a three-dimensional model of tumour cell extravasation to test the hypothesis that certain types of tumour cells are able to induce vascular endothelial cell injury. Multicellular tumour spheroids (MCTS) of 14 human cancer cell lines and spheroids from two benign cell lines were transferred onto confluent monolayers of human endothelial cells (EC). MCTS from 4 of 7 melanoma cell lines induced damage of the endothelium which was closely associated with tumour cell attachment. Endothelial cell injury became evident morphologically by loss of cell membrane integrity and sensitivity to shear stress. Similar res…