Evidence for two distinct classes of murine B cell growth factors with activities in different functional assays

نویسندگان

  • S L Swain
  • M Howard
  • J Kappler
  • P Marrack
  • J Watson
  • R Booth
  • G D Wetzel
  • R W Dutton
چکیده

Several previously described B cell growth factor (BCGF) activities from a number of mouse monoclonal T cell sources were compared in different functional assays. The results indicate that there are two distinct classes of BCGF defined by functional activity and source. BCGF I, whose prototype is (EL4)BCGF, synergized with anti-Ig in the proliferation of normal splenic B cells but had no activity when dextran sulfate (DXS), rather than anti-Ig, was used to costimulate the same source of B cells. BCGF I also failed to directly stimulate BCL1 tumor B cells. In contrast, BCGF II, whose prototype is (DL)BCGF, showed a reciprocal pattern of activity. BCGF II failed to synergize with anti-Ig-costimulated normal B cells to give good proliferative responses. Sources of BCGF II also directly stimulated (no anti-Ig or DXS added) B cells of the BCL1 tumor-carrying mice. These results suggest that the two BCGF may have activity on two subsets of B cells that respond differentially to induction with the two polyclonal B cell activators, anti-Ig and DXS. The possibilities that these different patterns of response occur in separate lineages of B cells and/or in B cells in different states of differentiation is discussed.

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

Assay of Tgf-β And B-Fgf on the Potential of Peripheral Blood-Borne Stem Cells and Bone Marrow-Derived Stem Cells in Wound Healing in a Murine Model

Purpose: Effects of TGF-b and b-FGF on the Potential of Peripheral Blood-Borne Stem Cells and Bone Marrow-Derived Stem Cells In Wound Healing in a Murine Model.Materials and Methods: Peripheral blood mesenchymal stem cells (PBMSCs) and bone marrow stem cells (BMSCs) cultured in media with transforming growth factor-beta (TGF-b) and basic fibroblast growth factor (b-FGF). Stem cells labeled with...

متن کامل

Identification of Two Epitopes on the Outer Surface Protein A of the Lyme Disease Spirochete Borrelia burgdorferi

A murine IgM monoclonal antibody (MA-2C6) with κ-light chains directed against an antigenic determinant of outer surface protein A (OspA) of the Lyme disease spirochete, Borreliaburgdorferi, is produced. This antibody could bind specifically to OspA antigen of several isolates of B. burgdorferi, but not to the non-Lyme disease bacteria such as T. pallidum and B. hermsii. Antibody MA-2C6 was pur...

متن کامل

Evaluation of antioxidant and anti-melanogenic activities of different extracts from aerial parts of Nepeta binaludensis Jamzad in murine melanoma B16F10 cells

Objective(s): Nepeta binaludensis Jamzad (Lamiaceae) has been used in folk medicine of Iran to cure various diseases. The plant is an endemic species to the country that has recently been identified in Razavi Khorasan province. To evaluate the antioxidant and anti-melanogenesis of N. binaludensis, in this study the inhibitory activity of different extracts of N. binaludensis in murine melanoma ...

متن کامل

The Validated Embryionic Stem Cell Test to Predict Embryotoxicityinvitro

Backgrounds: A straight-forward way to identify whether a drug or environmental chemical can be harmful to unborn baby is to evaluate its effect on laboratory animals. All invivo methods need large number of animal and are therefore time consuming and expensive. However, the thousands of chemicals in need of testing, to reduce the spending of live animals, an assortment of in vitro assays has ...

متن کامل

تاثیر نوع منبع نیتروژنی بر برخی خصوصیات فیزیولوژیک دو سویه جلبک آب شور Dunaliella

Abstract As nitrogen source is a necessary element in structure and cell metabolism, studying of nitrogen source and its effect on growth and different behave of photosynthetic organisms has received much attention. In this study, the comparative effects of three nitrogen sources (KNO3, NH4Cl and KNO3+NH4Cl) have been studied on physiological properties of two Dunaliella species, as ...

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:
  • The Journal of Experimental Medicine

دوره 158  شماره 

صفحات  -

تاریخ انتشار 1983