Abstract:
:We have been studying hematopoietic effects by the tachykinins, which like many other neuropeptides can be expressed in neural and nonneural tissues. Substance P (SP) and neurokinin-A (NK-A), members of the tachykinins are immune and hematopoietic modulators. SP and NK-A are derived from the preprotachykinin-I gene (PPT-I) through alternate splicing and posttranslational modification. In the bone marrow (BM), nerve fibers provide a source of neural SP and the stroma provides a source of nonneural SP. The tachykinins interact with each of three cloned neurokinin (NK) receptors (NK-1R, NK-2R, NK-3R) with SP and NK-A exhibiting binding preferences for NK-1R and NK-2R, respectively. Proliferation of myeloid progenitors (CFU-GM) is differentially regulated by SP and NK-A. The former enhances the proliferation whereas the latter is inhibitory. The BM stroma mediates most of the hematopoietic effects exerted by SP and NK-A partly through the induction of cytokines. The proliferative effects of SP correlate with the induction of positive hematopoietic growth factors such as IL-3, IL-6, GM-CSF and c-kit ligand and the inhibitory effects by NK-A correlate with the induction of two negative hematopoietic regulators, MIP-1 alpha and TGF-beta. Intracellular signals mediated by NK-1R and NK-2R are part of the mechanism responsible for tachykinin-mediated regulation of hematopoiesis. The stimulatory effects on BM progenitors mediated by NK-1R can be partly inhibited by NK-2R activation. IL-1 and other cytokines induced by SP in BM stroma modulate NK-1R induction. Furthermore, SP can induce IL-1 type I receptor in stroma. Together, these data suggest that the tachykinins and the cytokines interact to regulate hematopoiesis. These interactions contribute to hematopoietic regulation by mechanisms that involve induction of: (1) tachykinins and cytokines by each other; (2) NK-1R by cytokines and (3) cytokine receptor by the tachykinins. These studies emphasize that in terms of hematopoiesis, the cytokines and neuropeptides are not mutually exclusive factors and thus, the hematopoietic regulatory network would be incomplete without the role of neuropeptides being considered.
journal_name
Acta Haematoljournal_title
Acta haematologicaauthors
Rameshwar P,Gascón Pdoi
10.1159/000203593subject
Has Abstractpub_date
1997-01-01 00:00:00pages
59-64issue
2eissn
0001-5792issn
1421-9662journal_volume
98pub_type
杂志文章,评审abstract::Recombinant alpha-interferons are used as therapeutic agents in an increasing number of benign and malignant disorders. Long-term administration of recombinant alpha-interferon as a maintenance agent is associated with a small number of adverse side-effects which are responsible for patient intolerance of this drug. T...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204881
更新日期:1991-01-01 00:00:00
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journal_title:Acta haematologica
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journal_title:Acta haematologica
pub_type: 杂志文章
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journal_title:Acta haematologica
pub_type: 杂志文章
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journal_title:Acta haematologica
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journal_title:Acta haematologica
pub_type: 杂志文章,评审
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更新日期:2008-01-01 00:00:00
abstract::Mesenteric panniculitis is a rare idiopathic inflammatory disorder that can lead to sclerosis. We describe a patient with mesenteric panniculitis presenting with abdominal symptoms and autoimmune haemolytic anaemia. The symptoms remitted after splenectomy and gradual steroid taper. This may suggest an autoimmune compo...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000046627
更新日期:2002-01-01 00:00:00
abstract::Plasma samples from patients with disseminated intravascular coagulation (DIC) associated with acute promyelocytic leukemia (APL) exhibited higher levels of the D-fragment of fibrin and fibrinogen degradation products [FDP(D)], with relatively lower levels of cross-linked fibrin degradation products (XDP), than sample...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000205392
更新日期:1989-01-01 00:00:00
abstract::Premature neonates require blood transfusions, and biological parents may wish to be directed donors. Biological mothers pose a potential danger because their plasma may contain antibodies that will react with blood cell antigens inherited by the infant from the father. We studied 25 healthy, pregnant women at the tim...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204889
更新日期:1991-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章,评审
doi:10.1159/000204260
更新日期:1994-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000040959
更新日期:1999-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207589
更新日期:1979-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204662
更新日期:1992-01-01 00:00:00
abstract::15 patients with aplastic anemia were prospectively followed after having measurements of myeloid progenitor cells in bone marrow and blood. Treatment included androgens, low or high dose steroids and standardized supportive care. The median length of survival was 5.8 months. When patients were grouped according to th...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206263
更新日期:1985-01-01 00:00:00
abstract::A 3-year-old child developed severe aplastic anaemia following hepatitis A. Since no HLA-compatible donor was available, he was treated with oxymetholone, antithymocytic globulin and methylprednisolone, but no haematologic recovery was observed and he consequently died of pneumonia. Although the association of aplasti...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206061
更新日期:1986-01-01 00:00:00
abstract::A new case of IgE myeloma is described. A 77-year-old woman presented with bone pain and fatigue. Serum protein analysis revealed a paraprotein of the IgE kappa type; bone marrow aspirate and immunofluorescence confirmed the diagnosis; ultrastructural examination showed immature plasma cells. Treatment with prednisone...
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pub_type: 杂志文章
doi:10.1159/000204851
更新日期:1991-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000208204
更新日期:1975-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章,评审
doi:10.1159/000360235
更新日期:2014-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000040901
更新日期:1998-01-01 00:00:00
abstract::This report describes a case of hairy cell leukemia (HCL) occurring with autoimmune chronic active hepatitis (CAH). A 74-year-old woman presented with typical clinical and histologic features of HCL for which splenectomy was performed. 2 years later she developed abnormal liver function tests due to auto-immune CAH. T...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206291
更新日期:1985-01-01 00:00:00
abstract::Automated cytochemistry by the Hemalog D carries out leukocyte differential counts in a continuous flow mode on whole blood EDTA-collected samples, through the optical measurement of enzyme activity and cell size. This operative principle thus parallels the basis of the FAB classification of acute leukemias. Although ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206394
更新日期:1984-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1159/000041035
更新日期:2000-01-01 00:00:00
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journal_title:Acta haematologica
pub_type: 临床试验,杂志文章
doi:10.1159/000449120
更新日期:2016-01-01 00:00:00
abstract::A modified cytochemical method was developed for demonstrating magnesium-activated adenosine triphosphatase in haemic cells. The enzyme was shown in a variety of normal and leukaemic, unfixed cells. The high sensitivity of this enzyme to all fixatives tried in this study hampered further exploration and characterizati...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000205983
更新日期:1987-01-01 00:00:00
abstract::During a screening for hemoglobinopathies, we found a carrier of the Sardinian δβ-thalassemia condition. The proband's hematology and hemoglobin (Hb) profile agreed with those of the other carriers previously identified during our diagnostic program except for the fetal Hb (HbF) composition, which consisted of both α2...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000447942
更新日期:2016-01-01 00:00:00
abstract::Alpha-thalassemia is very common in the Kuwaiti population, but its influence on anemia of pregnancy has not been previously investigated. We have screened a group of 59 anemic (Hb < 11 g/dl) pregnant women for the alpha-thal-2 (-alpha-3.7 kb) deletion which is the commonest alpha-thal allele in this community, using ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000039757
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:Thalassemia is a group of hereditary hemoglobinopathies caused by decreased or absent synthesis of α and/or β globin chains. Studies have shown that hypercoagulability and thrombosis are common clinical symptoms in β-thalassemia, especially β-thalassemia intermedia, but little is known about in α-thalassemia...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000486157
更新日期:2018-01-01 00:00:00
abstract::A case of lymphoma presenting with features shared by hairy cell leukemia (HCL) and its variant, intermediate lymphocytic lymphoma (ILL) and monocytoid B-cell lymphoma (MBCL) is described. Clinical presentation and the morphological findings observed in peripheral blood and in bone marrow biopsy suggested an HCL; howe...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204496
更新日期:1993-01-01 00:00:00
abstract::An ultrastructural study of the aspirated bone marrow of a patient with congenital dyserythropoietic anemia type I is presented. Both in transmission electron microscopy (TEM) and in scanning electron microscopy (SEM) ultrastructural abnormalities of the bone marrow erythroid precursors were seen. These abnormalities ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206735
更新日期:1983-01-01 00:00:00
abstract:BACKGROUND:Immunotherapy using recombinant human interleukin-2 (rIL-2) produces objective responses in a proportion of advanced cancer patients. While early investigators employed intravenous (i.v.) treatment regimens, recent clinical trials applied therapy schedules via subcutaneous (s.c.) injection, mostly in combina...
journal_title:Acta haematologica
pub_type: 临床试验,杂志文章
doi:10.1159/000204503
更新日期:1993-01-01 00:00:00