نتایج جستجو برای: colony growth

تعداد نتایج: 862540  

Journal: :Blood 1980
J F DiPersio J K Brennan M A Lichtman C N Abboud F H Kirkpatrick

GCT, a human monocyte-like cell line, has been shown to release biochemically distinct colony-stimulating activities (CSAs) for mouse and human marrows. These appear to be periodate-sensitive proteins with critical disulfide bonds. One, of molecular weight 145,000 daltons, stimulates macrophagic colony growth and is related to a 30,000-dalton molecule that also stimulates mouse growth. A 30,000...

Journal: :Blood 1996
R M Weber-Nordt R Henschler E Schott J Wehinger D Behringer R Mertelsmann J Finke

Bcl-2 expression has been shown in hematopoietic progenitor cells. Through the use of Bcl-2 specific antisense oligonucleotides we herein report the biologic importance of Bcl-2 expression in primary human CD34+ hematopoietic progenitor cells committed to the myeloid lineage. In bone marrow or peripheral blood derived CD34+ cells Bcl-2 specific antisense decreased cell survival and inhibited th...

Journal: :Infection and immunity 1998
B A Leonard M Woischnik A Podbielski

Many of the virulence factors associated with fulminant group A streptococci (GAS) infection are expressed under in vitro exponential growth conditions. However, the survival of GAS in tissue and intracellularly, as well as colonization of asymptomatic carriers, has been reported for GAS. The bacteria associated with these niches may encounter high-density, low-nutrient-flowthrough conditions t...

2003
Naoki KOBAYASHI Takuya SATO Yoshihiro YAMAZAKI Mitsugu MATSUSHITA

In this Note we report the attempt of generalization of Mimura et al. (MSM) model for colony formation of bacteria. We also show the numerical results, which are then compared with experiments. Bacterial species Bacillus subtilis exhibits various colony patterns in response to two environmental parameters, i.e., concentrations of nutrient Cn and agar Ca in a thin agar plate as incubation medium...

2017
Ignace L. M. M. Tack Philippe Nimmegeers Simen Akkermans Ihab Hashem Jan F. M. Van Impe

Clustered microbial communities are omnipresent in the food industry, e.g., as colonies of microbial pathogens in/on food media or as biofilms on food processing surfaces. These clustered communities are often characterized by metabolic differentiation among their constituting cells as a result of heterogeneous environmental conditions in the cellular surroundings. This paper focuses on the rol...

2011
Ramesh R. Sagili Tanya Pankiw Bradley N. Metz

Division of labor is a striking feature observed in honey bees and many other social insects. Division of labor has been claimed to benefit fitness. In honey bees, the adult work force may be viewed as divided between non-foraging hive bees that rear brood and maintain the nest, and foragers that collect food outside the nest. Honey bee brood pheromone is a larval pheromone that serves as an ex...

Journal: :Journal of clinical pathology 1978
A J Barrett P Longhurst N Rosengurt J R Hobbs J G Humble

Clinical preparations of horse antilymphocyteglobulin (ALG) were found to inhibit human bone marrow granulocyte colony growth. This effect was enhanced by complement and was dose dependent, being almost complete at ALG concentrations of 100 microgram/ml. Inhibition was a property of ALG but not of normal horse globulin. However, short incubation of ALG with bone marrow cells occasionally stimul...

Journal: :Blood 1990
K Koike T Nakahata T Kubo T Kikuchi M Takagi A Ishiguro K Tsuji K Naganuma A Okano Y Akiyama

We investigated the effect of interleukin-6 (IL-6) on murine megakaryocytopoiesis in a serum-free culture system. The addition of IL-6 to a culture containing interleukin-3 (IL-3) resulted in a significant increase in the number of megakaryocyte colonies by bone marrow cells of normal mice. The megakaryocytic progenitors that survive exposure to 5-fluorouracil (5-FU) exhibited a more significan...

Journal: :Blood 1986
W E Fibbe J van Damme A Billiau P J Voogt N Duinkerken P M Kluck J H Falkenburg

An electrophoretically pure preparation of natural human interleukin-1 (IL-1) was shown to stimulate in vitro colony formation in human bone marrow cultures. Day 4 myeloid cluster-forming cells (CFC), as well as early (day 7) and late (day 10) granulocyte-macrophage colony-forming units (CFU-GM) were stimulated in a dose-dependent fashion. At optimal concentrations of IL-1, the number of day 4 ...

Journal: :Blood 1996
L S Rusten S D Lyman O P Veiby S E Jacobsen

The present studies investigated the effects of the recently cloned flt3 ligand (FL) on the in vitro growth and differentiation of primitive and committed subsets of human CD34+ bone marrow (BM) progenitor cells. FL alone was a weak growth stimulator of CD34+ BM cells, but synergistically and directly enhanced colony formation in combination with interleukin (IL) 3, granulocyte colony-stimulati...

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