RESUMO
Both systemic and in situ natural killer (NK) activity was assessed in young and old C57BL/6N and CBA/N mice bearing primary murine sarcoma virus-induced tumors. Splenic NK activity was depressed in tumor-bearing mice relative to normal age-matched controls. In situ NK activity was detected in young mice, and the level paralleled that found in the spleens of the same mice. In older mice, in situ NK activity was not detected. Furthermore, the depressed levels of activity in the spleens of tumor-bearing mice seemed to reflect systemic effects rather than migration of NK cells from the spleen to the tumor site.
Assuntos
Citotoxicidade Imunológica , Células Matadoras Naturais/imunologia , Sarcoma Experimental/imunologia , Animais , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos CBA , Vírus do Sarcoma Murino , Baço/imunologiaRESUMO
Three new tissue culture cell lines, CHP-100, CHP-126, and CHP-134, have been established from explant cultures of human neuroblastoma. The cell lines have been characterized with respect to morphology, chromosomes constitution, growth, neural enzyme content, and their ability to grow in nude mice. The cells grow as dense masses comprised of fibroblast-or neuroblast-like cells with small processes. The cell lines differ in their neural enzyme acitivity. The chromosomal content of the 3 cell lines is near diploid, and all are capable of forming tumors in nude mice. The morphological findings indicate that the cells in culture resemble those found in the tumor, and the enzyme activities are consistent with those of nervous tissue. This the morphological, biochemical, and tumorigenic properties confirm that the 3 cell lines are neoplastic cells of neural origin.
Assuntos
Linhagem Celular , Neuroblastoma , Acetilcolinesterase/metabolismo , Animais , Divisão Celular , Criança , Colina O-Acetiltransferase/metabolismo , Aberrações Cromossômicas , Técnicas de Cultura , Feminino , Humanos , Lactente , Masculino , Camundongos , Camundongos Nus , Microscopia Eletrônica , Transplante de Neoplasias , Neuroblastoma/enzimologia , Neuroblastoma/genética , Neuroblastoma/patologia , Transplante Heterólogo , Tirosina 3-Mono-Oxigenase/metabolismoAssuntos
Neuroblastoma , Fatores Etários , Catecolaminas/urina , Pré-Escolar , Ciclofosfamida/uso terapêutico , Quimioterapia Combinada , Feminino , Humanos , Imunidade Celular , Masculino , Metástase Neoplásica , Neuroblastoma/diagnóstico , Neuroblastoma/imunologia , Neuroblastoma/terapia , Prognóstico , Vincristina/uso terapêuticoRESUMO
Circulation in the blood stream of neuroblastoma cells was confirmed by establishment of a cell line from the peripheral blood of a child with disseminated disease. The morphologic, enzymatic, and chromosomal pattern of this cell line was similar to a cell line established from the primary tumor on a previous occasion. The peripheral blood smear did not demonstrate tumor cells but increased numbers of atypical monocytes; lymphoblasts were evident, which may have been unrecognized neuroblasts.
Assuntos
Linhagem Celular , Células Neoplásicas Circulantes , Neuroblastoma , Acetilcolinesterase/metabolismo , Colina O-Acetiltransferase/metabolismo , Feminino , Humanos , Lactente , Cariotipagem , Neuroblastoma/enzimologia , Neuroblastoma/genética , Tirosina 3-Mono-Oxigenase/metabolismoRESUMO
Immune spleen cells from mice injected with murine sarcoma virus (MSV) can produce migration inhibition factor (MIF) in vitro after stimulation with intact tumor cells. We have now found that this effector function can be regulated by suppressor macrophages present in the tumor. The cells from the tumor (CfT) exert a strong suppressive effect even after treatment with anti-Thy 1.2 plus complement but lose this capacity if adherent or phagocytic cells are removed, suggesting that the macrophage is the suppressor cell. The effects of the suppressor cells were exerted on a proliferation-independent function of the lymphocytes, since MIF production, as well as its suppression, occurred even after proliferation of the lymphocytes was blocked by mitomycin-C. The implications of these findings are that macrophages can suppress some early events involved in the activation of lymphocytes by antigen and that they do so through a mechanism that does not relate to the proliferation of the cells.
Assuntos
Leucemia Experimental/imunologia , Linfócitos/imunologia , Linfocinas/biossíntese , Macrófagos/imunologia , Animais , Líquido Ascítico/citologia , Feminino , Ativação Linfocitária , Linfócitos/metabolismo , Macrófagos/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Mitomicinas/farmacologia , Vírus da Leucemia Murina de Moloney , Transplante de Neoplasias , Vírus Rauscher , Baço/citologia , Linfócitos T/imunologia , Linfócitos T/metabolismo , Transplante IsogênicoRESUMO
Rhabdomyosarcomas of the head and neck may spread by diffuse local invasion, resulting in erosion of the base of the skull with possible extension to the leptomeninges, brain, and cranial nerves, as well as invasion of the ventricular system with possible intradural, extramedullary metastases anywhere along the neuraxis. Meningeal spread of tumor is difficult to eradicate, and nearly all patients reviewed died soon after meningeal disease was evident. Patients with erosion of the base of the skull or abnormal cranial nerve findings seem to have a risk of seeding the meninges with tumor. The clinical evolution of this pattern of metastatic spread is reviewed, diagnostic studies are recommended, and therapeutic considerations are discussed. Tentative treatment guidelines are also offered.
Assuntos
Neoplasias de Cabeça e Pescoço , Neoplasias Meníngeas/diagnóstico , Rabdomiossarcoma/diagnóstico , Ataxia/etiologia , Criança , Pré-Escolar , Feminino , Humanos , Pressão Intracraniana , Masculino , Neoplasias Meníngeas/terapia , Metástase Neoplásica , Inoculação de Neoplasia , Rabdomiossarcoma/terapia , Neoplasias Cranianas/diagnóstico , Compressão da Medula Espinal/etiologiaRESUMO
The records of 207 neuroblastoma patients seen at the Children's Hospital of Philadelphia between 1944 and 1977 were reviewed to study some of the features associated with the unusually good prognosis found in patients with Stage IV-S neuroblastoma. Initially, 22 patients appeared to fit the criteria of small primary tumor and distant disease in liver, skin, and/or marrow without evidence of bone metastases; 5 patients were subsequently rejected as being incorrectly staged. The remaining 17 patients had abdominal primary tumors and hepatic disease; in 12 of the 17, an enlarged liver was the presenting sign. Six patients had skin lesions, 4 had disease in the marrow on routine smear, and additional sites of spread were pancreas and bowel serosa. The treatment given was not systematic, and it was not possible to correlate any specific form of therapy with a satisfactory outcome. Eleven of 17 patients survived; 6 of 11 survivors had spontaneous regression of all or part of their diseases, 5 of 6 who died received irradiation, chemotherapy, or both. Death usually occurred in the first month as a complication of the local disease; 1 patient succumbed to radiation nephritis. This study establishes that the special pattern of widespread neuroblastoma termed Stage IV-S does exist, and that is associated with a good prognosis. Careful consideration should be given before selecting treatment for the Stage IV-S child because spontaneous regression is likely to occur in most of them. In patients with rapidly enlarging livers, renal or pulmonary complications may develop because of liver bulk or coagulopathies. Treatment should be directed to the liver in these cases because distant metastases seldom supervene. Low-dose irradiation, mild chemotherapy, and possibly surgical release of intraabdominal pressure using a silastic patch have all been effective. Unfortunately, patients occasionally succumb to local disease in spite of these and more aggressive measures.