RESUMO
In experiment on 30 corpses of adult people criteria of an operational wound (depth of a wound, a corner of operational action, an axis of operational action, a corner of an inclination of operational action) were studied at preauricularis, intrauricularis, intrauriculo-temporalis and posterior mandibullaris access to temporo-mandibular joint (TMJ). New surgical intrauriculo-temporalis access to the joint is substantrated. On the basis of the analysis of 289 operations at 268 patients the indications to a choice of surgical access were developed at various diseases and damages of TMJ.
Assuntos
Procedimentos Cirúrgicos Bucais , Transtornos da Articulação Temporomandibular/cirurgia , Articulação Temporomandibular/cirurgia , Adolescente , Adulto , Idoso , Cadáver , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
8-methoxycaffeine (8-MOC) is a caffeine derivative more potent than its parental compound in inducing chromosomal aberrations. 8-MOC has been postulated to produce chromosomal aberrations by DNA topoisomerase II inhibition. The effect of 8-MOC on nuclear DNA were studied by alkaline elution experiments and compared with those of Ellipticine and Adriamycin (ADR). Like Ellipticine and ADR, 8-MOC induced single strand breaks (SSBs), double strand breaks (DSBs), and DNA-protein cross-links (DPCs) in a bell-shaped manner with respect to drug concentration. As in the case of ADR and Ellipticine, 8-MOC induced equal SSB and DPC frequencies. These results could suggest that 8-MOC induces DNA breaks by interacting with DNA topoisomerase II or with a similar DNA metabolism enzyme.
Assuntos
Cafeína/análogos & derivados , Aberrações Cromossômicas , Reagentes de Ligações Cruzadas/farmacologia , Dano ao DNA , Substâncias Intercalantes/farmacologia , Leucemia L1210/patologia , Inibidores da Topoisomerase II , Animais , Cafeína/farmacologia , Doxorrubicina/farmacologia , Elipticinas/farmacologia , Camundongos , Células Tumorais Cultivadas/efeitos dos fármacos , Células Tumorais Cultivadas/ultraestruturaRESUMO
Tumor metastasis is the major cause of death of oncology patients. One of the characteristic properties acquired by the metastatic cell is the ability to cross basement membranes. These are compartments of extracellular matrix composed largely by collagen type IV, laminin and a heparan sulphate proteoglycan. Here we review the use of a reconstituted basement membrane (Matrigel) in the Boyden chamber assay (Chemoinvasion Assay) for the assessment of the invasiveness of tumor cells of human origin. The possibility of using this test for the rapid evaluation of human tumor specimens from operated patients is discussed.
