摘要:
A process for preparing human T cell hybridomas which are subculturable and produce lymphokines comprising the steps of: (1) treating a human acute leukemia cell with a protein and/or RNA synthesis inhibitor; (2) independently activating a human T cell with a mitogen or antigen; (3) fusing the thus-treated human acute leukemia cell with the thus-activated human T cell in the presence of a fusion accelerator; and (4) isolating the thus-formed hybridoma. An in vivo process for producing lymphokines using the hybridomas is also described.
摘要:
Nucleoside or glucose derivatives of N-acetylneuraminic acids are provided, which have immunological activity, are clinically useful, as an immuno suppressive, in particular to treat autoimmune disease such as collagenosis disease without causing any serious side-effects and may be prepared by subjecting a halide of N-acetylneuraminate derivative together with a nucleoside or a glucose to Koenigs-Knorr reaction.
摘要:
Lymphotoxin-producing human T-cell hybridomas are incubated in a medium containing phorbol myristate acetate, concanavalin-A or a mixture thereof, the resulting cells are fractionated by sucrose density-gradient centrifugation method to isolate a messenger RNA in 12.6S to 14.6S fractions, and a gene containing a part encoding a polypeptide having a lymphotoxin-activity is prepared from the messenger RNA. The gene is represented by the base sequence of the Table 1 as herein given. Using the present gene, a new lymphotoxin having the amino acid sequence (I) or (II) as given herein can be obtained by genetic engineering technology.
摘要:
The present invention relates to a monoclonal antibody which specifically binds to a peptide having amino acid sequence (I) described below or having in part at least continuous 4 amino acid sequences of the amino acid sequence (I), and also to a process for producing a monoclonal antibody capable of specifically binding to the peptide represented by the following amino acid sequence:H-Y-Leu-Gly-Arg-X-Asp-Gly-Ser-Glu-OH (I)wherein X represents Glu or Gln and Y represents Trp or Arg.
摘要:
The present invention relates to a renal growth promoter based on the finding that luteinizing hormone or an isoform thereof has an effect of promoting renal growth.It was previnsly unknown that luteinizing hormone or an isoform thereof has an effect of promoting renal growth.With the present invention, it is expected that kidneys suffering from a decreased in the number of renal cells or a lowering in the renal function may be activated by administering luteinizing hormone or an isoform thereof.
摘要:
Lymphotoxin-producing human T-cell hybridomas are incubated in a medium containing phorbol myristate acetate, concanavalin-A or a mixture thereof, the resulting cells are fractionated by sucrose density-gradient centrifugation method to isolate a messenger RNA in 12.6S to 14.6S fractions, and a gene containing a part encoding a polypeptide having a lymphotoxin-activity is prepared from the messenger RNA. The gene is represented by the nucleotide sequence of the Table 1 as herein given. Using the present gene, a new lymphotoxin having the amino acid sequence (I) or (II) as given herein can be obtained by genetic engineering technology.
摘要:
The present invention relates to physiologically active peptides and more particularly, to novel peptides having a specific amino acid sequence which possess a macrophage chemotactic activity.
摘要:
A novel N-acetylneuraminic acid derivative, represented by the general formula: ##STR1## wherein the R.sup.1 groups are, independently, hydrogen or acetyl; R.sup.2 is a nucleoside residue; and R.sup.3 is carboxyl or methoxycarbonyl.The N-acetylneuraminic acid derivative is useful in inhibiting metastasis of cancer cells. Also provided is a process for the preparation of the derivatives.