Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 119 (1988), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We used a biotinylated antibody ELISA technique to measure plasma levels of lactoferrin (LF) and the LF content of peripheral blood PMN in 20 patients with psoriasis, 21, with eczema or other inflammatory skin conditions, 19 patients with malignant skin tumours and 20 healthy control individuals.In psoriasis, plasma LF levels were significantly increased compared with levels in the other skin conditions and in the healthy controls (P 〈 0.01). Furthermore, in psoriasis the LF content of circulating PMN was decreased.These findings provide further evidence that in psoriasis systemic activation (‘priming’) of circulating PMN may take place.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 109 (1983), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Chemotactic activities of circulating polymorphonuclear leukocytes (PMN) were determined in twenty patients with psoriasis and twenty healthy control persons. After serial dilution of the complement split product C5a and the formylated tripeptide f-met-Ieu-phe (FMLP), chemotaxis profiles showed that PMN migration toward both chemotaxins was significantly increased in psoriasis. In addition, PMN from psoriatic patients responded to chemotaxins at much lower concentrations compared with controls.The liberation of (lysosomal) β-glucuronidase was also determined in cytochalasin B-treated cells confronted with increased concentrations of the chemotaxins. Secretion of this marker enzyme started at lower concentrations in PMN derived from psoriatic patients.Our observations demonstrate migratory and secretory hyper-responsiveness of PMN from psoriatic patients. This may play a role in perpetuating the psoriatic tissue reaction.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 103 (1980), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The chemotactic activity of polymorphonuclear leukocytes (PMNs) directed against serum was determined in a modified Boyden chamber assay. In a total of 176 experiments PMNs and sera from healthy controls were compared with PMNs and sera from patients with psoriasis. When PMNs from patients with psoriasis were confronted with psoriatic serum greatly enhanced chemotaxis was demonstrated. Non-psoriatic PMNs in the presence of psoriatic serum showed no enhancement. However, psoriatic PMNs in the presence of normal serum were chemotactically more active compared to non-psoriatic PMNs. Heat inactivation (56°C, 30 min) reduced the chemotactic activity of all sera by nearly 50%. However in psoriatic sera the enhancement of chemotaxis was still present after heat treatment. The results indicate the presence of a functional abnormality of chemotaxis in psoriasis. This is likely to be caused by the in situ generation of chemotactically active fragments of complement. Experiments showing increased chemotactic activity of sera exposed to migrating PMNs support this concept.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 127 (1992), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Anthralin is a well-established and widely used compound for topical treatment of psoriasis. In recent years attention has been focused on the anti-inflammatory properties of anthralin, with particular reference to psoriasis. In this study the effect of anthralin on human monocyte chemotaxis, superoxide-anion generation, and enzyme degranulation, were investigated. For comparison, the effect of the clinically inactive anthralin derivative danthrone and the solvent (acetone) were also studied. The results show that anthralin potently inhibits stimulated human monocyte superoxide-anion generation and enzyme degranulation, with a half-maximal inhibitory concentration (IC50) of as low as 0.02 μg/ml. Chemotactic migration of monocytes, however, was only affected when very high doses of anthralin (10 μg/ml) were used for pretreatment of the cells. Danthrone, up to a concentration of 10 μg/ml, or acetone alone (0.1%, v/v), did not inhibit the monocyte functions tested. Our results indicate that anthralin at pharmacological concentrations is a potent and selective inhibitor of human monocyte pro-inflammatory activities, by inhibiting respiratory burst activity (e.g. superoxide-anion generation) and enzyme degranulation, without affecting chemotactic migration.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 29 (1989), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Functions of eosinophils and neutrophils isolated from normal human blood were determined by measuring chemotactic migration and release of β-glucuronidase. Four well-Characterized chemotaxins, the complement fragment C5a, formyl-methionyl-leucyl-phenylalanine (FMLP), platelet-activating factor (PAF), and leukotriene B4 (LTB4) were used as stimuli. Neutrophils showed remarkable chemotactic responses to all four chemotaxins. In contrast, eosinophils showed a significant chemotactic response to C5a and PAF, but only weak responses to FMLP and LTB4. Using these chemotaxins we found the following order of chemotactic potency (maximal number of migrated cells): C5a=LTB4〉FMLP〉PAF for neutrophils and PAF=C5a〉LTB4=FMLP for eosinophils. Neutrophils elicited a significant β-glucuronidase release when stimulated by C5a and FMLP, whereas only small amounts were released with PAF and LTB4. On the other hand, an amount of β-glucuronidase released from eosinophils comparable to that from neutrophils was elicited only with C5a. FMLP, LTB4, and PAF caused the release of small percentages of β-glucuronidase. The important cellular functions of eosinophils and neutrophils, chemotaxis and enzyme release, are thought to be controlled by differential responsiveness to stimuli.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 35 (1992), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In this study we report on functional characteristics of pustule as well as blood polymorphonuclear neutrophils (PMN) in patient suffering from relapsing bullous staphyloderma. Large numbers of viable PMN from newly formed pustules as well as from the peripheral blood were investigated. During the course of disease chemotactic migration, enzyme degranulation, superoxide-anion generation and leukotriene B4 production were determined simultaneously.The results revealed C5a- and NAP-1/IL-8-specific dysfunction of pustule PMN as compared with blood PMN. In contrast, FMLP-elicited functional activities of pustule PMN were only slightly affected.Our findings provide evidence that in inflamed tissue invading PMN are regulated by in situ generated mediators. C5a produced by staph. aureus-induced activation of the alternative pathway of the complement cascade represents predominant regulatory factor in situ. Furthermore, the results substantiate previous observations concerning different modulation of C5a and f-met-peptide receptors on human PMN.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human recombinant tumour necrosis factor β (rhuTNFβ)/lymphotoxin was tested for human neutrophil granulocyte (PMN), monocytes (MO), and T-cell chemotactic activity by means of a modified Boyden chamber system. Over a wide range of concentrations (10-7-10-14 M) rhuTNFβ showed no chemotactic activity for PMN, MO, or T cells. In contrast, strong chemotactic migration was elicited in PMN and MO with the tripeptide N-formyl-methionyl-leucylphenylalanine (FMLP) and in T cells when complement split product C5a and leukotriene B4 (LTB4) were used as chemotaxins. The results of this study indicate that rhuTNFβ/lymphotoxin is not a chemotaxin for human PMN, MO, or T lymphocytes in vitro.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Allergy 57 (2002), S. 0 
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: To gain insight into the mechanisms responsible for tissue neutrophil immigration in sinusitis, primary nasal fibroblasts are analyzed for synthesizing and delivering neutrophil chemokines.Methods: Primary nasal fibroblast cell culture was treated with tumor necrosis factor (TNF)-α concentrations of 20 and 200 ng/ml for 2, 8, 24 and 72 h. Chemokine concentrations in supernatants were determined by enzyme-linked immunoassay (ELISA) and chemokine mRNA expression in fibroblasts was measured by reverse transcriptase polymerase chain reaction (RT-PCR). Biological chemotactic activity was identified by three-step high-performance liquid chromatography (HPLC) and by bioassay measuring neutrophil chemotaxis in a single Boyden chamber system.Results: Interleukin (IL)-8 and growth-related oncogene (GRO)-α were induced in nasal fibroblast culture by proinflammatory stimulus. After 24 h of stimulation neutrophil chemotactic activity only was detected for IL-8. Granulocyte chemotactic protein (GCP)-2 mRNA was already significantly up-regulated after 2 h of stimulation.Conclusion: Induction of IL-8 protein dominates chemokine synthesis 24 and 72 h after stimulation, whereas induction of GCP-2 mRNA seems to have a role in the early phase after 2 h of exposition with TNF-α.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 32 (1990), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In the presence of high concentrations of exogenous arachidonic acid (≥ 10 μm). eosinophils produced 15-hydroxycicosatetraenoic acid (15-HETE) in the absence of stimuli. The calcium ionophore A23187, as well as the chemotaxins used in this study-complement split product C5a, platelet-activating factor (PAF). and,N-formyl-methionyl-leucyl-phenylalanine(FMLP)–failed to increase 15-HETE production, indicating that eosinophil 15-lipoxygenase is already active Production of 15-HETE from eosinophils increased with increasing concentrations of arachidonic acid, exogenously added. Maximal 15-HETE production was observed to he 1111 ± 380 ng per 106 eosinophils at the concentration of 100μm of arachidonic acid. With low concentrations of exogenous arachidonic acid (below 2;μm). eosinophils were considered to incorporate exogenous arachidonic acid into their cell membrane, and did not produce 15-HETE. In contrast, 15-HETE formation in highly purified neutrophils (eosinophils 〈 1%) was negligible compared with that in eosinophils (.300-fold less), suggesting that 15 f HETE-forming activity in granulocytes is derived from the eosinophil 15-lipoxygetiase pathway and that neutrophils may lack 15-lipoxygcnase activity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Although neutrophils have been implicated in bronchial asthma, the mechanism(s) which bring these cells into the airways is poorly understood.Objective To investigate the presence and identity of neutrophil chemotactic factors in bronchoalveolar lavage (BAL) fluid from atopic asthmatic subjects.Method BAL fluid was obtained from 13 subjects (seven asthmatics and six normals). aged 19 to 60 yr, at bronchoscopy. Separation of neutrophil chemotactic activity (NCA) was achieved by FPLC cation exchange chromatography. Fractions were collected and assayed for chemotaxis multiwell micro-chemotaxes chambers using polycarbonate filters, for the complement peptide C5a/C5a des Arg by radioimmunoassay (RIA) and for interleukin-8 (IL-8) by ELISA.Results NCA was found in FPLC fractions of BAL samples in four out of seven asthmatics and each of these subjects had at least three similar peaks of NCA. The major peak of NCA was found to contain immunoreactive C5a/C5a des Arg and chemotaxis. In response to this NCA could be blocked by desensitization of the neutrophils with recombinant C5a. Purified serum derived C5a/C5a des Arg was found to have altered chromatographic properties when added to BAL fluid; this suggested that BAL fluid contained proteins which interacted with the C5a/C5a des Arg. Immunoreactive IL-8 (iIL-8) was also detected but its concentration or chemical form was insufficient to induce neutropbil chemotaxis.Conclusion This study demonstrates that bronchial asthmatic lavage fluid contains C5a/C5a des/Arg and iL-8, together with other as yet unidentified factors which may contribute to neutropbil recruitment in this disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...