Marked improvement of thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura by pegylated recombinant human megakaryocyte growth and development factor
We examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW × BXSB) F l (W/B F 1) mice, a murine model of idiopathic thrombocytopenic purpura. A cohort of 19- to 25-week-old, severely thrombocytopenic...
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Published in: | Experimental hematology Vol. 30; no. 10; pp. 1185 - 1192 |
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Abstract | We examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW × BXSB) F
l (W/B F
1) mice, a murine model of idiopathic thrombocytopenic purpura.
A cohort of 19- to 25-week-old, severely thrombocytopenic male W/B F
1 mice were given PEG-rHuMGDF at different dosing schedules. Before and at various times after therapy, platelet counts, reticulated platelets, platelet lifespan, and levels of platelet-associated immunoglobulin G were measured. Analysis of megakaryocytic cells was performed.
Treatment of male W/B F
1 mice with PEG-rHuMGDF (30 μg/kg/day) three times per week for several weeks resulted in sustained thrombocytosis, accompanied by increased megakaryocytopoiesis in both the bone marrow and spleen. The degree of the platelet response to PEG-rHuMGDF varied between individual mice, likely reflecting the heterogeneity of the disease. Production of new platelets in response to PEG-rHuMGDF was manifested by an increase in reticulated platelets. Levels of platelet-associated immunoglobulin G decreased inversely during periods of thrombocytosis. PEG-rHuMGDF therapy also improved thrombocytopenia in male W/B F
1 mice refractory to splenectomy. Platelet lifespan was not affected by PEG-rHuMGDF. Male W/B F
1 mice treated with pegylated murine MGDF, a homologue of PEG-rHuMGDF, had persistent thrombocytosis for at least 7 months, suggesting that antiplatelet antibody production was not enhanced.
PEG-rHuMGDF therapy potently stimulated platelet production, effectively ameliorating thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura. |
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AbstractList | OBJECTIVEWe examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW x BXSB) F(l) (W/B F(1)) mice, a murine model of idiopathic thrombocytopenic purpura. MATERIALS AND METHODSA cohort of 19- to 25-week-old, severely thrombocytopenic male W/B F(1) mice were given PEG-rHuMGDF at different dosing schedules. Before and at various times after therapy, platelet counts, reticulated platelets, platelet lifespan, and levels of platelet-associated immunoglobulin G were measured. Analysis of megakaryocytic cells was performed. RESULTSTreatment of male W/B F(1) mice with PEG-rHuMGDF (30 microg/kg/day) three times per week for several weeks resulted in sustained thrombocytosis, accompanied by increased megakaryocytopoiesis in both the bone marrow and spleen. The degree of the platelet response to PEG-rHuMGDF varied between individual mice, likely reflecting the heterogeneity of the disease. Production of new platelets in response to PEG-rHuMGDF was manifested by an increase in reticulated platelets. Levels of platelet-associated immunoglobulin G decreased inversely during periods of thrombocytosis. PEG-rHuMGDF therapy also improved thrombocytopenia in male W/B F(1) mice refractory to splenectomy. Platelet lifespan was not affected by PEG-rHuMGDF. Male W/B F(1) mice treated with pegylated murine MGDF, a homologue of PEG-rHuMGDF, had persistent thrombocytosis for at least 7 months, suggesting that antiplatelet antibody production was not enhanced. CONCLUSIONSPEG-rHuMGDF therapy potently stimulated platelet production, effectively ameliorating thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura. We examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW x BXSB) F(l) (W/B F(1)) mice, a murine model of idiopathic thrombocytopenic purpura. A cohort of 19- to 25-week-old, severely thrombocytopenic male W/B F(1) mice were given PEG-rHuMGDF at different dosing schedules. Before and at various times after therapy, platelet counts, reticulated platelets, platelet lifespan, and levels of platelet-associated immunoglobulin G were measured. Analysis of megakaryocytic cells was performed. Treatment of male W/B F(1) mice with PEG-rHuMGDF (30 microg/kg/day) three times per week for several weeks resulted in sustained thrombocytosis, accompanied by increased megakaryocytopoiesis in both the bone marrow and spleen. The degree of the platelet response to PEG-rHuMGDF varied between individual mice, likely reflecting the heterogeneity of the disease. Production of new platelets in response to PEG-rHuMGDF was manifested by an increase in reticulated platelets. Levels of platelet-associated immunoglobulin G decreased inversely during periods of thrombocytosis. PEG-rHuMGDF therapy also improved thrombocytopenia in male W/B F(1) mice refractory to splenectomy. Platelet lifespan was not affected by PEG-rHuMGDF. Male W/B F(1) mice treated with pegylated murine MGDF, a homologue of PEG-rHuMGDF, had persistent thrombocytosis for at least 7 months, suggesting that antiplatelet antibody production was not enhanced. PEG-rHuMGDF therapy potently stimulated platelet production, effectively ameliorating thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura. We examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW × BXSB) F l (W/B F 1) mice, a murine model of idiopathic thrombocytopenic purpura. A cohort of 19- to 25-week-old, severely thrombocytopenic male W/B F 1 mice were given PEG-rHuMGDF at different dosing schedules. Before and at various times after therapy, platelet counts, reticulated platelets, platelet lifespan, and levels of platelet-associated immunoglobulin G were measured. Analysis of megakaryocytic cells was performed. Treatment of male W/B F 1 mice with PEG-rHuMGDF (30 μg/kg/day) three times per week for several weeks resulted in sustained thrombocytosis, accompanied by increased megakaryocytopoiesis in both the bone marrow and spleen. The degree of the platelet response to PEG-rHuMGDF varied between individual mice, likely reflecting the heterogeneity of the disease. Production of new platelets in response to PEG-rHuMGDF was manifested by an increase in reticulated platelets. Levels of platelet-associated immunoglobulin G decreased inversely during periods of thrombocytosis. PEG-rHuMGDF therapy also improved thrombocytopenia in male W/B F 1 mice refractory to splenectomy. Platelet lifespan was not affected by PEG-rHuMGDF. Male W/B F 1 mice treated with pegylated murine MGDF, a homologue of PEG-rHuMGDF, had persistent thrombocytosis for at least 7 months, suggesting that antiplatelet antibody production was not enhanced. PEG-rHuMGDF therapy potently stimulated platelet production, effectively ameliorating thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura. |
Author | Yuki, Chizuru Kuwaki, Tomoaki Akahori, Hiromichi Kato, Takashi Miyazaki, Hiroshi Shibuya, Kazunori Tahara, Emiko |
Author_xml | – sequence: 1 givenname: Kazunori surname: Shibuya fullname: Shibuya, Kazunori organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 2 givenname: Tomoaki surname: Kuwaki fullname: Kuwaki, Tomoaki organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 3 givenname: Emiko surname: Tahara fullname: Tahara, Emiko organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 4 givenname: Chizuru surname: Yuki fullname: Yuki, Chizuru organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 5 givenname: Hiromichi surname: Akahori fullname: Akahori, Hiromichi organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 6 givenname: Takashi surname: Kato fullname: Kato, Takashi organization: Pharmaceutical Research Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan – sequence: 7 givenname: Hiroshi surname: Miyazaki fullname: Miyazaki, Hiroshi email: miyazakih@kirin.co.jp organization: Pharmaceutical Development Laboratory, Kirin Brewery Company, Ltd., Gunma, Japan |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/12384150$$D View this record in MEDLINE/PubMed |
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CitedBy_id | crossref_primary_10_1007_s12185_014_1661_4 crossref_primary_10_1371_journal_pone_0059512 |
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Snippet | We examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in male (NZW... OBJECTIVEWe examined the stimulatory effect of pegylated recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) on platelet production in... |
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SubjectTerms | Animals Blood Platelets - drug effects Blood Platelets - physiology Crosses, Genetic Disease Models, Animal Humans Male Mice Mice, Inbred Strains Platelet Count Polyethylene Glycols Purpura, Thrombocytopenic, Idiopathic - blood Purpura, Thrombocytopenic, Idiopathic - drug therapy Purpura, Thrombocytopenic, Idiopathic - immunology Recombinant Proteins - therapeutic use Splenectomy Thrombopoietin - therapeutic use Time Factors |
Title | Marked improvement of thrombocytopenia in a murine model of idiopathic thrombocytopenic purpura by pegylated recombinant human megakaryocyte growth and development factor |
URI | https://dx.doi.org/10.1016/S0301-472X(02)00898-6 https://www.ncbi.nlm.nih.gov/pubmed/12384150 https://search.proquest.com/docview/72186668 |
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