Proliferation kinetics of subpopulations of human marrow cells determined by quantifying in vivo incorporation of [2H2]-glucose into DNA of S-phase cells.
نویسندگان
چکیده
This report investigated in vivo turnover kinetics of marrow hematopoietic progenitors and precursors using a recently developed stable isotope-mass spectrometric technique (SIMST). Human subjects were administered a 2-day infusion of 6,6-[2H2]-glucose, a nontoxic stable isotope-labeled form of glucose, which becomes incorporated into DNA of all S-phase cells. The percent [2H2]-glucose incorporated into DNA in the form of [2H2]-deoxyadenosine (%[2H2]-dA enrichment) was determined by gas chromatography-mass spectrometry. The rate constant of replacement of unlabeled by labeled DNA strands (labeling kinetics) was used to calculate population turnover kinetics of CD34+ cells, CD133+ cells, and CD133-CD34+ cells. The observed mean replacement half-life (t1/2) was 2.6 days for CD34+ cells, 2.5 days for CD133-CD34+ cells, and 6.2 days for CD133+ cells. Results from the estimated rate constant of replacement of labeled by unlabeled DNA (delabeling kinetics) also demonstrated slower turnover rates for CD133+ cells than for CD133-CD34+ cells. Although there was a relatively rapid initial decrease in the %[2H2]-dA enrichment, low levels of labeled DNA persisted in CD34+ cells for at least 4 weeks. The results indicate the presence of subpopulations of CD34+ cells with relatively rapid turnover rates and subpopulations with a slower t1/2 of 28 days. Results also demonstrate that in vivo [2H2]-glucose-SIMST is sensitive enough to detect differences in turnover kinetics between erythroid and megakaryocyte lineage cells. These studies are the first to demonstrate the use of in vivo [2H2]-glucose-SIMST to measure in vivo turnover kinetics of subpopulations of CD34+ cells and precursors in healthy human subjects.
منابع مشابه
Proliferation kinetics of subpopulations of human marrow cells determined by quantifying in vivo incorporation of [H2]-glucose into DNA of S-phase cells
This report investigated in vivo turnover kinetics of marrow hematopoietic progenitors and precursors using a recently developed stable isotope–mass spectrometric technique (SIMST). Human subjects were administered a 2-day infusion of 6,6-[H2]-glucose, a nontoxic stable isotope-labeled form of glucose, which becomes incorporated into DNA of all Sphase cells. The percent [H2]-glucose incorporate...
متن کاملEx vivo Expansion and Differentiation of Mesenchymal Stem Cells from Goat Bone Marrow
Objective(s) Mesenchymal stem cells (MSCs) from large animals as goat which is genetically more closely related to human have rarely been gained attentions. The present study tried to isolate and characterize MSCs from goat bone marrow. Materials and Methods Fibroblastic cells appeared in goat marrow cell culture were expanded through several subcultures. Passaged-3 cells were then different...
متن کاملRat Bone Marrow Mesenchymal Stem Cell Differentiation to Insulin Producing Cells and Evaluation their Responses in Vitro and in Vivo
Background In recent years, many researchers haveattempted to cure diabetes by using stem cells technology. Stem cells from different sources have capabilityto differentiateinto insulin producing cells (IPCs) by different methods. The obstaclesof these methods aretheirexpensive materials and complexity ofmethodswhichare practicallydisadvantagesfor producing enough transplantableIPCs that can ...
متن کاملGnidilatimonoein from Daphne mucronata inhibits DNA synthesis in human cancer cell lines
The anticancer agents from plant sources usually exert their action through a wide range of mechanisms. As part of our studies of plants for new anticancer agents with emphasis on Thymelaeaceae family, we examined the cytotoxicity and anti-tumor activity of the water extract of D. mucronata leaves against induced breast tumor in rats. In the current study, we were interested to obtain some know...
متن کاملGnidilatimonoein from Daphne mucronata inhibits DNA synthesis in human cancer cell lines
The anticancer agents from plant sources usually exert their action through a wide range of mechanisms. As part of our studies of plants for new anticancer agents with emphasis on Thymelaeaceae family, we examined the cytotoxicity and anti-tumor activity of the water extract of D. mucronata leaves against induced breast tumor in rats. In the current study, we were interested to obtain some know...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Blood
دوره 102 6 شماره
صفحات -
تاریخ انتشار 2003