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Query: UMLS:C0027947 (neutropenia)
 17,527 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Coventional kittens, 12-27 weeks old, were inoculated with cell-cultured feline panleucopenia virus and killed sequentially between day 3 and day 24 after inoculation. All developed a non-fatal mild disease between days 2 and 9, characterized by lymphopenia, neutropenia, listlessness, depression and the development of neutralizing antibodies to the virus. Small intestinal bacterial counts were reduced during the period of maximal clinical disease, presumably a result of decreased food intake. There was involution of the thymus with marked depletion of lymphocytes between days 3 and 12. Depletion of lymphocytes also characterized the lesions in the lymph nodes between days 3 and 8. At the same time crypt lesions with spotty distribution were in the small intestinal and colonic mucosa. The changes were loss of crypt epithelial cells with compensatory attenuation of the remaining epithelium. Electron microscopically, the number and size of microvilli and secretory granules were reduced but there was no change indicating lethal cell injury. There were no virus particles. The findings point to an early and transient cellular damage by the virus. Intestinal alkaline phosphatase activity disappeared from the luminal surface of the attenuated crypt epithelial cells. Otherwise, intestinal alkaline and acid phosphatase activity were not altered in inoculated cats.
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PMID:Experimental feline panleucopenia in the conventional cat. 93 27

A child with congenital neutropenia was studied using bone marrow culture and ultrastructural and cytochemical techniques. The patient's marrow cells formed a large number of granulocytic colonies of normal size in culture, and her peripheral blood leukocytes produced adequate colony-stimulating factor. No serum inhibitors were identified. The patient's promyelocytes from direct marrow and culture appeared normal in ultrastructure, and primary granules, contained peroxidase and acid phosphatase activity. Myelocytes and rare segmented neutrophils from direct marrow specimens demonstrated atypical notched nuclei, myelin figures in Golgi lamellae and primary (azurophilic) granules, and no identifiable secondary (specific) granules. These data indicate an intrinsic neutrophil defect which allows normal proliferation of precursor cells, but results in abnormal granulogenesis and apparent inability to form secondary granules.
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PMID:Congenital neutropenia: neutrophil proliferation with abnormal maturation. 117 7

Clinicopathological findings of six cases of Hairy cell leukaemia are presented. All the patients were males, the age ranged between 32-57 years. Complications of anaemia and neutropenia were common modes of presentation. Hepatomegaly and splenomegaly were present in all the cases whereas only 2 patients had lymphadenopathy. Severe pancytopenia was detected in 3 cases and circulating hairy cells were present in all the cases. Trephine biopsy done in all six patients was found to be diagnostic. Tartrate resistant acid phosphatase was detected in the hairy cells of 2 cases.
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PMID:A clinico-pathological study of six cases of hairy cell leukaemia. 179 14

Lymphocytes, co-expressing CD4/Leu7 and CD8/Leu7 markers respectively, taken from two patients having large granular lymphocytosis taking an indolent clinical course have been comparatively studied for function as NK cells and T cells. Both large granular lymphocytes (LGLs) were acid phosphatase positive and showed a beta-glucuronidase reaction in their cytoplasmic granules. Studies on case 1 indicated that the CD4/Leu7 lymphocytosis with LGL morphology takes a benign clinical course with mild neutropenia as well as those of CD8/Leu7 LG lymphocytosis. Both CD4/Leu7 and CD8/Leu7 LGLs behave similarly in their lack of NK activity, and manifest decreased IL-2 production in vitro and show a low IL-2 receptor expression unrelated to their T cell phenotype, but behave differently in influencing the immunoglobulin production in vitro and the ADCC activity, depending on their T cell phenotype and on the expression of Fc receptor, respectively. Furthermore, the altered Fc receptors which were undetectable by the Leul 1 antibody but were still effective for ADCC activity might be present in case 2 LGLs.
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PMID:CD4/Leu7 and CD8/Leu7 large granular lymphocytosis: comparative studies between NK cells and T cells. 251 16

This study investigated the possible contribution of neutrophils to development of reexpansion pulmonary edema (RPE) in rabbits. Rabbits' right lungs were collapsed for 7 days and then reexpanded with negative intrathoracic pressure for 2 h before study, a model that creates unilateral edema in the reexpanded lungs but not in contralateral left lungs. Two hours after lung reexpansion, significant increases in lavage albumin concentration (17-fold), percent neutrophils (14-fold), and total number of neutrophils (7-fold) recovered occurred in the reexpanded lung but not in the left. After 2 h of reexpansion increased leukotriene B4 was detected in lavage supernatant from right lungs (335 +/- 33 pg/ml) compared with the left (110 +/- 12 pg/mg, P less than 0.01), and right lung lavage acid phosphatase activity similarly increased (6.67 +/- 0.35 U/l) compared with left (4.73 +/- 0.60 U/l, P less than 0.05). Neutropenia induced by nitrogen mustard (17 +/- 14 greater than neutrophils/microliters) did not prevent RPE, because reexpanded lungs from six neutropenic rabbits were edematous (wet-to-dry lung weight ratio 6.34 +/- 0.43) compared with their contralateral lungs (4.97 +/- 0.04, P less than 0.01). An elevated albumin concentration in reexpanded lung lavage from neutropenic rabbits (8-fold) confirmed an increase in permeability. Neutrophil depletion before reexpansion did not prevent unilateral edema, although neutrophils were absent from lung sections and alveolar lavage fluid from neutropenic rabbits.
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PMID:Neutrophils in reexpansion pulmonary edema. 284 Dec 77

A female patient with an unusual lymphoproliferative disease associated with marked neutropenia has been observed for 36 months. The expanded cell population consists of large lymphocytes, many of which contain large azurophilic granules with acid phosphatase activity. These cells were T3, T8, T11 and Leu 11 positive but lacked the M1, T10, IL-2 receptor and HLA.DR antigens. The majority of these cells (60-70%) were also Leu 7 (HNK-1) positive. Strong natural killer (NK) activity was found in both the Leu 7 positive and negative cell populations. This cytotoxic activity was inhibited by monoclonal antibodies known to inhibit NK activity but was unaffected by antibodies which block T cell and T/NK cell cytotoxicity. Further functional analysis indicated that these cells suppressed normal T cell responses to mitogens, MLC responses and PWM induced B cell immunoglobulin synthesis. No effect on bone marrow progenitor cell growth was demonstrated. Antibody dependent cellular cytotoxic (ADCC) activity was barely detectable despite the presence of the Leu 11 antigen. Southern blot DNA analysis demonstrated clonal rearrangement of the T cell receptor beta gene thereby confirming that this variant of T gamma lymphoproliferative disease was a neoplastic condition.
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PMID:Functional analysis of a clonal expansion of Leu 11 positive NK active lymphoid cells. 295 59

A patient with low-grade lymphocytosis, splenomegaly, and neutropenia, but adequate myeloid leukogenesis, was found to have chronic lymphocytic leukemia, which represented a clonal proliferation of a distinct T-lymphocyte subset. The lymphocytes did not form E rosettes but had an OKT3+, OKT4+, OKT6+, OKT8+, OKT11+, HNK-1+, HNK-36+, OKIa1+, OKM1+ phenotype and functionally had suppressor and natural killer activity. Morphologically, they were large granular lymphocytes, which were strongly acid phosphatase positive and nonspecific esterase negative. They did not respond to mitogens, or to allogeneic cells. Initially, the spleen appeared to be the most involved organ and, judging from the high proportion of leukemic splenic lymphocytes in the S and G2/M phases of the cell cycle, was also the organ of origin of the leukemic cells. Only a few leukemic cells in the blood and bone marrow were in S and G2/M phases. After splenectomy, the lymphocyte count rose considerably and the bone marrow became progressively more infiltrated by tumor nodules. One year after diagnosis, the patient was started on chemotherapy because of progressive anemia. He responded to the chemotherapy by normalization of the hemoglobin and neutrophil count and had a moderate decrease in the bone marrow involvement and peripheral lymphocytosis.
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PMID:Natural killer and suppressor T-cell chronic lymphocytic leukemia. 622 21

We report four patients with expansion of a unique population of lymphocytes that is consistently associated with neutropenia. Two patients also had rheumatoid arthritis and autoantibodies. The lymphocytes contained many cytoplasmic azurophilic granules, which possessed strong acid phosphatase activity. Multiple cytoplasmic parallel tubular arrays were observed ultrastructurally. These granular lymphocytes showed the T suppressor/cytotoxic cell phenotype (E+, OKT3+, OKT8+, OKT4-, OKM1-, OKI1-) and exhibited antibody-dependent cell-mediated cytotoxic activity but little or no natural killer cytotoxicity. They did not respond to recall antigens, concanavalin A, or pokeweed mitogen, but the cells from one patient did respond to phytohemagglutinin. No in vitro suppressor cell activity on mitogenic responses of allogeneic cells and on mixed lymphocyte cultures could be demonstrated. There was no evidence of suppression of immunoglobulin synthesis in vivo. It is uncertain that the expansion of this subset of lymphocytes represents a leukemic process. Their constant association with neutropenia, however, raises the possibility that the increase in large granular lymphocytes and neutropenia might be pathogenetically related.
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PMID:A morphologic and immunologic study of the large granular lymphocyte in neutropenia with T lymphocytosis. 623 66

Twenty-one patients are described with a proliferation of morphologically mature T lymphocytes. The clinical course was chronic in most, and splenic enlargement the main clinical finding; skin involvement and lymphadenopathy were rare. The mean lymphocyte count at presentation was 8 X 10(9)/1 (range 0.75-24 X 10(9)/1). Nineteen of these patients showed some form of cytopenia (18 neutropenia, two red cell aplasia, eight thrombocytopenia) and one had hypogammaglobulinaemia. Seven patients had long-standing arthropathy serologically proven to be rheumatoid arthritis and these had previously been considered to have Felty's syndrome. Five of the group have died (three with an aggressive course), but most have remained stable for prolonged periods with a slow increase in peripheral lymphocyte count and marrow infiltration. Spontaneous regression was never observed but in two patients a prolonged remission was achieved by chemotherapy. The lymphocytes were morphologically and phenotypically homogeneous at presentation and remained so post-splenectomy; they contained azurophilic granules, stained with acid phosphatase but weakly or not at all with alpha napthyl acetate esterase. Membrane phenotyping shows the majority of the cells to be E+, Fc gamma+, OKT3+, OKT8+. Most cells do not stain with OKT1-like reagents and a significant number express HLA-Dr. From these and other reported cases it is clear that this condition represents a distinct entity resulting from the expansion of a subset of cytotoxic/suppressor T cells--the question of the benign or neoplastic nature of the disease remains open. Using T cell-specific antisera and E-rosetting techniques, a small percentage of CLL cases have been shown to be of T-cell origin (TCLL) (Dickler et al, 1973; Lille et al, 1973). Estimates of the percentage vary but in most series T-CLL has been diagnosed in less than 5% (Brouet & Seligmann, 1981), and this is supported by date from the M.R.C. Leukaemia Unit which found T-CLL in only 1.5% of 600 cases of CLL examined by marker studies (D. Catovsky, unpublished). Amongst the published reports of T-CLL a variety of clinical and morphological entities have been described including T prolymphocytic leukaemia (TPLL) (Brouet et al. 1975) and adult T cell disease in Japanese (Uchiyama et al, 1977) and West Indian Caribbean groups (ATLL) (Catovsky et al, 1982). In the original series of Brouet & Seligmann (1981) the group was defined as presenting in middle age with marked hepatosplenomegaly, some lymphadenopathy, skin involvement and with an aggressive disease course; peripheral blood and marrow lymphocytosis were variable.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Chronic T cell lymphocytosis: a review of 21 cases. 633 88

From 1972 to 1981 10 patients with hairy cell leukaemia were observed in the Medical University Clinic Cologne, this represents 1.8% of all leukaemias. Typical clinical signs are splenomegaly, no or only slightly enlarged lymph nodes and a moderate hepatomegaly. Almost in all cases an anaemia, thrombocytopenia and neutropenia with lymphocytosis was found, mostly combined as pancytopenia. The pathognomonic tartrate resistant acid phosphatase was found in the hairy cells to a differing amount besides a fibrosis and a lymphatic infiltration of the bone marrow. A normalization of the anaemia, the thrombocytopenia and the neutropenia was reached by splenectomy, but the increased susceptibility to infections could not be affected significantly.
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PMID:[Clinical aspects of hairy cell leukemia and its modification by splenectomy]. 676 22


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