摘要:
The present application discloses strategies to recruit and mobilize stem cells using S1P receptor selective agonists and antagonists as wells as regulators of chemokine receptors. In an in vivo ischemic model, S1P1/S1P3 activation with FTY720 impeded inflammatory cell infiltration and recruited endothelial progenitor cells (EPCs) with the potential to increase microvascular remodeling. S1P3 expression on marrow-derived cells was essential for this remodeling. Concurrent systemic S1P3 and CXCR4 antagonism mobilized hematopoietic stem cells (HSCs) with the ability to engraft and repopulate blood cells. Pre-treatment of donor HSCs with FTY720 increased homing toward SDF-1 and improved engraftment in marrow. FTY720-coated bone allografts coupled with systemic administration of VPC01091 enhanced bone allograft integration and new bone formation in bone defects. MSCs pre-treated with FTY720 exhibited increased migration toward SDF-1, a CXCR4+ ligand. The results show that S1P is a very powerful role player in pharmacological marrow-derived stem cell mobilization and recruitment.
摘要:
Amidine analogs that can inhibit the activity of sphingosine kinase 1 and sphingosine kinase 2 (SphK1 & SphK2) are provided. The compounds can prevent angiogenesis in tumor cells.
摘要:
Sphingosine-1 -phosphate analogs that are potent, and selective agonists at one or more SlP receptors, specifically the S1P1 receptor type are provided. The disclosed compounds include an optional phosphate moiety as well as compounds with hydrolysis-resistant phosphate surrogates such as phosphonates, alpha- substituted phosphonates, and phosphothionates.
摘要:
Compounds that have agonist activity at one or more of the SlP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at SlP receptors. Formula (I):
摘要:
The present invention relates to S1P analogs that have activity as S1Preceptor modulating agents and the use of such compounds to treat diseases associated with inappropriate S1P receptor activity. The compounds have the general structure (I) wherein R 11 is C 5 -C 18 alkyl or C 5 -C 18 alkenyl; Q is selected from the group consisting of C 3 -C 6 optionally substituted cycloalkyl, C 3 -C 6 optionally substituted heterocyclic, C 3 -C 6 optionally substituted aryl C 3 -C 6 optionally substituted heteroaryl and; R 2 is selected from the group consisting of H, C 1 -C 4 alkyl, (C 1 -C 4 alkyl)OH and (C 1 -C 4 alkyl)NH 2 ; R 23 is H or C 1 -C 4 alkyl, and R 15 is a phosphonate ester or a phosphate ester or a pharmaceutically acceptable salt or tautomer thereof.
摘要:
The present invention is directed to compositions comprising lysophosphatidic acid analogs and methods of using such analogs as agonist or antagonists of LPA receptor activity. In addition the invention is directed to LPA receptor agonists that vary in the degree of selectivity at individual LPA receptors (i.e. LPA1, LPA2 and LPA3). More particularly the present invention is directed to LPA analogs wherein the glycerol is replaced with ethanolamine and a variety of substitutions have been linked at the second carbon atom.
摘要:
The present invention is directed to the psychosine (galactosylsphingosine) receptor (named TDAG8), antibodies that specifically bind to that receptor, and the use of the receptor to identify agonists or antagonists of TDAG8 receptor activity.
摘要:
Sphingosine-1 -phosphate analogs that are potent, and selective agonists at one or more SlP receptors, specifically the S1P 1 receptor type are provided. The disclosed compounds include an optional phosphate moiety as well as compounds with hydrolysis-resistant phosphate surrogates such as phosphonates, alpha- substituted phosphonates, and phosphothionates.
摘要:
Benzocycloheptyl analogs that have agonist activity at one or more of the S IP receptors are provided. The compounds are sphingosine analogs, which, after phosphorylation, can behave as agonists at SlP receptors.
摘要:
Benzocycloheptyl analogs that have agonist activity at one or more of the S IP receptors are provided. The compounds are sphingosine analogs, which, after phosphorylation, can behave as agonists at SlP receptors.