Abstract:
:Cardiotrophin-1 (CT-1) is a recently discovered cytokine that was isolated based on its ability to induce cardiac myocyte hypertrophy in vitro. In this study, the effects of chronic administration of CT-1 to mice (0.5 or 2 microg by intraperitoneal injection, twice a day for 14 days) were determined. A dose-dependent increase in both the heart weight and ventricular weight to body ratios was observed in the treated groups. The body weights of the animals were unaffected. These results indicate that CT-1 can induce cardiac hypertrophy in vivo. CT-1 was not specific for the heart, however. It stimulated the growth of the liver, kidney, and spleen, and caused atrophy of the thymus. CT-1 administration also increased the platelet counts by 70%, with no change in mean platelet volume. Red blood cell counts were increased in the treated animals, and there was a concomitant increase in haemoglobin concentration. Thus, CT-1 has a broad spectrum of biological activities in vivo. This observation is consistent with previous in-vitro findings showing that the mRNA for CT-1 is expressed in several tissues, and that CT-1 can function through binding to the leukaemia inhibitory factor (LIF) receptor and signalling through the gp130 pathway.
journal_name
Cytokinejournal_title
Cytokineauthors
Jin H,Yang R,Keller GA,Ryan A,Ko A,Finkle D,Swanson TA,Li W,Pennica D,Wood WI,Paoni NFdoi
10.1006/cyto.1996.0123subject
Has Abstractpub_date
1996-12-01 00:00:00pages
920-6issue
12eissn
1043-4666issn
1096-0023pii
S1043-4666(96)90123-4journal_volume
8pub_type
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