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1.
Journal of Iranian Anatomical Sciences. 2009; 7 (27): 25-31
in Persian | IMEMR | ID: emr-134446

ABSTRACT

The aim of this research was to study the effects of different doses of LIF on GVBD and MII development rate and cumulus expansion. Immature mice superovulated with HMG and GV oocytes obtained from ovary 48 hours later. The GV oocytes were cultured in TCM199 with 100, 500 and 1000 RI /ml LIF. Cumulus expansions were evaluated with two examiners and numbers of MII oocytes were recorded. For denuding the oocytes hyaloronidase was used. Our results showed that the rate of GVBD and MII development increased in -groups with LIF compared with control group. Rate of MII development with 1000 IU/ml LIF was significantly higher than that of control group [P<0.05]. Cumulus expansion in group with 1000 IU/ml LIF improved significantly compared with control group [p<0.05]. Our results showed that LIF could improve IVM rate in dose dependant. Also cumulus expansion improved in group with LIF and increased oocyte quality


Subject(s)
Animals, Laboratory , Oocytes/drug effects , Cumulus Cells/drug effects , Mice , Metaphase/drug effects
2.
Rev. bras. genét ; 17(3): 273-6, set. 1994. tab
Article in English | LILACS | ID: lil-165256

ABSTRACT

Mebendazole (MBZ), (methyl-5 benzoyl benzimidazole-2-carbamate), a potent antihelmintic agent, was tested for clastogenicity in Wistar rat bone marrow cells (l3OO, 1750, 3500 and 7000 mg/kg b.w.) and for both clastogenicity and antimitotic potential in human peripheral blood lymphocytes in culture (5, 10 and 20 mug/ml culture medium). One-hundred metaphases/treatment were analyzed for induction of chromosome aberrations and 2000 cells/treatment were counted to determine the mitotic index. MBZ did not induce an increase in the frequency of chromosome aberrations, however it was effective in blocking the cell cycle at metaphase.


Subject(s)
Humans , Animals , Male , Female , Adult , Rats , In Vitro Techniques , Mitotic Index , Lymphocytes/drug effects , Mebendazole/pharmacology , Bone Marrow , Metaphase/drug effects , Chromosome Aberrations , Mutagenicity Tests , Rats, Wistar/genetics
3.
Acta bioquím. clín. latinoam ; 25(4): 403-10, dic.1991. ilus
Article in Spanish | LILACS | ID: lil-105857

ABSTRACT

Los estudios realizados en el campo de la citogenética del cáncer han permitido determinar que las alteraciones cariotípicas de las células neoplásicas se encuentran distribuidas en el genoma en forma específica, encontrándose cromosomas particularmente asociados a diferentes tipos de neoplasias (1)(2). En lo que respecta a las neoplasias hematológicas, el análisis citogenético ha demostrado ser de gran importancia para la evaluación del diagnóstico, pronóstico y tratamiento de las mismas (3)(4). Los avances logrados en la citogenética de neoplasias han sido posibles debido al desarrollo y mejoramiento de distintas técnicas, que permiten la obtención de extendidos cromosómicos de alta calidad, donde es posible detectar alteraciones muy pequeñas del material genético. Sin embargo, las técnicas tradicionales de citogenética llevan a la destrucción de la membrana plasmática y del contenido citoplasmático. Si bien esto permite una mejor extensión y dispersión de los cromosomas, impide, por otro lado, la identificación de las células cuyos cariotipos son analizados. Esto último es de particular importancia en el caso de la médula ósea, donde existen numerosas progenies celulares capaces de originar mitosis para el análisis cromosómico. siendo imposible a través de las técnicas convencionales de citogenética, poder determinar si las anomalías cromosómicas observadas se encuentran o no restringidas a aquellas que muestran clonalidad. Actualmente es posible estudiar poblaciones celulares presentes en sangre periférica y médula ósea, a través de diferentes técnicas de inmunohistoquímica que, en los últimos años se han perfeccionado notablemente con el desarrollo de los anticuerpos monoclonales y los métodos enzimáticos de inmunomarcación. Los estudios previos realizados para determinar el origen de las células hematopoyéticas cariotípicamente anormales, se basaron en análisis morfológicos y citogenéticos separados de la misma muestra, o en la creación de poblaciones hemogéneas, a partir de células aisladas o cultivos de células progenitoras. Los primeros intentos de identificación directa de células mitóticas fueron hechos por Rastrick et al (5), usando el cromosoma Philadelphia (PH1) como un marcador de células leucémicas y la incorporación de hierro radiactivo como un indicador de precursores eritroides, en un paciente con leucemia mieloide crónica (LMC)> Blocstock y Garson (6) usaron la misma técnica en células de médula ósea, de pacientes con leucemia mieloide


Subject(s)
Cells, Cultured/analysis , Clinical Laboratory Techniques , Cytogenetics , Hodgkin Disease/diagnosis , Leukemia/diagnosis , Lymphoma/diagnosis , B-Lymphocytes/drug effects , Cell Line , Neoplastic Cells, Circulating/isolation & purification , Chromosome Aberrations/diagnosis , Chromosome Banding , Colchicine , Culture Techniques , Glutamine , Hybridization, Genetic/drug effects , Metaphase/drug effects , Mutagens , Philadelphia Chromosome , Phytohemagglutinins , T-Lymphocytes/drug effects
4.
Indian J Exp Biol ; 1989 Apr; 27(4): 317-23
Article in English | IMSEAR | ID: sea-56590

ABSTRACT

The sequence of post-metaphase mitotic events, such as anaphase movement A and B, chromosome decondensation, nuclear envelope reformation and cytokinesis, has been studied in 2,4-initrophenol (DNP)-treated HeLa cells. The effects of DNP were found to be dose dependent and at concentrations higher than 3 mM, both anaphase A and B movements were totally and nearly instantaneously arrested. It could be shown that cytokinesis did not depend on the completion of anaphase movements. This was also true for nuclear envelope reformation which could take place even around condensed chromosomes arrested in anaphase. The post-metaphase mitotic events do not follow a strict causal sequence, but they can be dissociated from each other in anaphase-arrested cells.


Subject(s)
2,4-Dinitrophenol , Anaphase/drug effects , Animals , Cell Division/drug effects , Chromosomes/drug effects , Dinitrophenols/pharmacology , Dose-Response Relationship, Drug , HeLa Cells , Humans , Metaphase/drug effects , Microscopy, Electron , Microtubules/ultrastructure , Mitosis/drug effects , Nuclear Envelope/drug effects
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