Stimulation of Oligodeoxyribonucleotide Synthesis by Cytoplasmic Factors in the Isolated Nuclei of Leukemic Cells1

نویسنده

  • Emil K. Schandl
چکیده

Nuclei were isolated by hypotonie shock and homogenization from freshly drawn, nonstimulated leukemic leukocytes and were pulse labeled with deoxythymidine triphosphate-3H. Labeled oligodeoxyribonucleotides were separated from the bulk of DNA and proteins by membrane cone filtration and were further purified by alkaline hy drolysis and diethylaminoethyl cellulose chromatography. In parallel experiments, cytoplasmic factors, obtained after removal of nonsoluble material from the cytoplasm by high-speed centrifugation, were included. More than a twofold increase of label incorporation into oligodeoxy ribonucleotides was observed.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Stimulation of oligodeoxyribonucleotide synthesis by cytoplasmic factors in the isolated nuclei of leukemic cells.

Nuclei were isolated by hypotonie shock and homogenization from freshly drawn, nonstimulated leukemic leukocytes and were pulse labeled with deoxythymidine triphosphate-3H. Labeled oligodeoxyribonucleotides were separated from the bulk of DNA and proteins by membrane cone filtration and were further purified by alkaline hy drolysis and diethylaminoethyl cellulose chromatography. In parallel exp...

متن کامل

مهار رشد رده سرطانی K562 لوسمی میلوییدی مزمن انسان با استفاده از عصاره سیتوپلاسمی لاکتوباسیلوس‌های جدا شده از روده ماهی کپور معمولی در شرایط آزمایشگاهی

Background: Lactobacillus species are genetically diverse groups of Lactic Acid Bacteria (LAB) that have been introduced as probiotics, because of some characteristics such as their anti-tumor properties, helping the intestinal flora balance, production of antibiotics, stimulation of host immune response, etc. The aim of this study was to investigate the effects of cytoplasmic extraction and...

متن کامل

Early estrogen action: nuclear synthesis and accumulation of protein correlated with enhancement of two DNA-dependent RNA polymerase activities.

During the early action of estrogen in the uterus of the ovariectomized rat, nuclear RNA synthesis in vivo is stimulated prior to the sequential stimulations of DNA-dependent RNA polymerase assayed in isolated nuclei incubated in the absence or the presence of ammonium sulfate.' The stimulation by the hormone of nuclear RNA synthesis in vivo also precedes the stimulation of nuclear protein synt...

متن کامل

F EEDBACK REGU LATION OF COLONYSTIMULATING FACTOR PRODUCTION

The production of colony-stimulating factors (CSF) is delicately controlled through a complex network of humoral and environmental factors. We have studied some of the mechanisms which regulate the production of CSF as compared to general protein synthesis in the lung tissue ill vitro. When lung tissue from mice was cultured for various times in serum free medium, the first detectable le...

متن کامل

Comparative Biochemical Studies of Adriamycin and Daunomycin in Leukemic Cells1

Adriamycin (AM) and daunomycin (DM) were compared as inhibitors of nucleic acid and protein biosynthesis in LI 210 leukemic cells. In vivo, both antibiotics markedly inhibited, without significant difference, the incorporation of the labeled precursors into DNA and RNA. In vitro, at a concentration of 5 or lOjUg/ml, DM was significantly more effective than AM in inhibiting DNA and RNA synthesis...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006