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
    s.l. : American Chemical Society
    Biochemistry 23 (1984), S. 5882-5887 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 35 (1992), S. 3364-3369 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The gene for vascular endothelial growth factor (VEGF) encodes three spliced isoforms. Although the heparin binding capacities of these isoforms differ, little is known about their differential functions in vivo. We generated mice expressing exclusively the VEGF120 isoform (VEGF 120/120 mice) ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 14 (1990), S. 670-678 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le but de la prophylaxie en matière de thrombose et embolie est premièrement de prévenir l'embolie pulmonaire mortelle et deuxièmement de réduire la morbidité associée à la thrombose veineuse profonde (TVP) et aux troubles postphlébitiques. La prophylaxie thromboembolique devrait être systématique chez les patients âgés de plus de 40 ans, devant subir une intervention chirurgicale majeure, une intervention sur la hanche ou ceux qui ont un cancer. L'héparine à faibles doses (5,000 UI) par voie sous cutanée, commencée 2 heures avant l'intervention et continuée toutes les 12 heures jusqu'à ce que le patient soit parfaitement ambulant, est efficace dans la prévention de TVP chez les patients médicaux et chirurgicaux, et elle réduit de façon significative l'incidence de l'embolie pulmonaire postopératoire fatale ainsi que la mortalité globale. Cette prophylaxie, même lorsque la TVP est établie, limite l'extension proximale de la thrombose, souvent phénomène précurseur de l'embolie pulmonaire majeure. Les complications hémorragiques dues à la prophylaxie par l'héparine à faibles doses sont peu importantes: essentiellement augmentation de la fréquence d'hématome pariétal plutôt que syndrome hémorragique clinique. On emploie de plus en plus actuellement des fragments héparinés à faible poids moléculaire. Ils présentent l'avantage d'une seule injection par jour pour une même efficacité dans la prévention des TVP. Les méthodes mécaniques de prévention contre la stase veineuse, telles que le bas élastique de compression, sont également utiles dans la prévention de TVP mais il n'a pas été démontré qu'ils prévenaient l'embolie pulmonaire fatale. On recommande surtout chez le patient qui ne doit pas recevoir d'héparinothérapie (par exemple après la neurochirurgie), et on les combine parfois avec l'héparinothérapie chez le patient à très haut risque.
    Abstract: Resumen El objetivo de la profilaxis del tromboembolismo venoso es, en primer lugar, la prevención de la embolia pulmonar fatal, y en segundo reducir la morbilidad asociada con trombosis venosa profunda (TVP) y el síndrome postflebítico en la enfermedad afectada. La profilaxis debe constituir una práctica estándar en la mayoría de los pacientes mayores de 40 años que sean sometidos a cirugía mayor y en pacientes jóvenes con historia de tromboembolismo venoso. Grupos de particular alto riesgo incluyen los pacientes mayores de 60 años sometidos a cirugía mayor, aquellos con neoplasias malignas, o quienes requieren operaciones de cadera. La heparina de baja dosis admnistrada por vía subcutánea, 5,000 UI, comenzando 2 horas antes de la operación y continuada cada 12 horas hasta que el paciente esté totalmente ambulatorio, es inequívocamente efectiva para prevenir TVP en pacientes médicos y quirúrgicos y, lo más importante, reduce en forma significativa la incidencia de embolismos postoperatorios fatales y la tasa total de mortalidad. Esta profilaxis, en presencia de TVP establecida también limita la propagación proximal del coágulo, fenómeno precursor de una embolia pulmonar mayor. La profilaxis con heparina de baja dosis aparece asociada con un bajo riesgo de complicaciones hemorrágicas, las cuales se evidencia generalmente por una aumentada frecuencia de hematomas de la herida más que por una hemorragia clínica. Los fragmentos químicos de bajo peso molecular de la heparina (por ejemplo, la Fragmina®, el Choay®, y la Enoxaparina®) están surgiendo como agentes alternativos utiles, con la ventaja de requerir ser administrados sólo una vez al día, pero con la misma efectividad en cuanto a la prevención de la TVP. Los métodos mecánicos preventivos que hacen contraparte a la estasis venosa, tales como las medidas de comprensión gradual, son también de utilidad para la protección de la TVP pero no han demostrado prevenir la embolia psotoperatoria fatal. Son particularmente recomendables en pacientes en quienes la profilaxis con heparina debe ser evitada (por ejemplo en la neurocirugía) y posiblemente en combinación con heparina en pacientes de alto riesgo.
    Notes: Abstract The objective of prophylaxis in venous thromboembolism is, first, to prevent fatal pulmonary embolism and, second, to reduce the morbidity associated with deep vein thrombosis (DVT) and the postphlebitic limb. This should now be standard practice for most patients over 40 years of age undergoing major surgery and for younger patients with a history of venous thromboembolism. Particularly high-risk groups include patients over 60 years of age undergoing major surgery, those with malignancy, and those requiring hip operations. Low-dose subcutaneous heparin 5,000 IU commencing 2 hours preoperatively and continuing 12 hourly until the patient is fully mobile is unequivocally effective in preventing DVT in medical and surgical patients and, most importantly, significantly reduces the incidence of fatal postoperative pulmonary embolism and total mortality. Such prophylaxis, in the presence of established DVT, also limits proximal clot propagation, which is the precursor of major pulmonary embolism. Low-dose heparin prophylaxis is associated with a small risk of bleeding complications, evidenced mostly by an increased frequency of wound hematoma rather than major clinical hemorrhage. Low molecular weight heparin fragments (e.g., Fragmin®, Choay®, Enoxaparine®) are emerging as useful alternative agents, having the advantage of once daily administration and yet providing similar efficacy in the prevention of DVT. Mechanical methods of prevention which counteract venous stasis, such as graduated elastic compression stockings, are also useful in protecting against DVT but have not been shown to prevent fatal postoperative pulmonary embolism. They are recommended particularly for patients in whom heparin prophylaxis is best avoided (e.g., neurosurgery) and possibly in combination with heparin in very high-risk patients.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Severe protein C deficiency is a rare, early onset, venous thrombotic condition that is inherited as an autosomal recessive trait. The protein C (PROC) genes of nine unrelated individuals with severe protein C deficiency were sequenced yielding a total of 13 different lesions. Eight of these were novel, including a gross gene deletion, three missense mutations, two micro-deletions, a splicing mutation and a single base-pair substitution in the HNF-3 binding site in the PROC gene promoter. Evidence for the pathogenicity of the mutations detected was obtained by molecular modelling, in vitro splicing assay and reporter gene assay. Neither the plasma protein C activity level nor the nature of the PROC gene lesions detected were found to be a good prognostic indicator of the age of onset or clinical severity of thrombotic symptoms. Other factors may thus complicate the relationship between genotype and clinical phenotype. Indeed, in two patients, the inheritance of either one or two Factor V Leiden alleles in addition to two PROC gene lesions could have served to precipitate the thrombotic events. No association was however apparent between clinical severity and the possession of a particular promoter polymorphism genotype. Despite the absence of a clear genotype-phenotype relationship, the molecular genetic analysis of the severe recessive form of protein C deficiency potentiates both the counselling of affected families and the provision of antenatal exclusion diagnosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Specifically-primed reverse transcripts of lymphocyte-derived factor VIII (FVIII) mRNA were successfully amplified by means of the polymerase chain reaction (PCR) thus further extending the phenomenon of ectopic (“illegitimate”) transcription of tissue-specific genes. The diagnostic potential of a basal rate of transcription in non-expressing tissues was then demonstrated by the detection of a novel point mutation in the FVIII gene causing haemophilia A by PCR/direct sequencing of ectopically transcribed mRNA derived from patient lymphocytes.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The polymerase chain reaction and direct sequencing were used to determine the nature of the mutations in the antithrombin III (AT3) gene in seven unrelated patients with familial antithrombin III (ATIII) deficiency and recurrent venous thrombosis. Three novel mutations were found, two associated with a type I deficiency state (Pro80→Thr and His120→Tyr) manifesting reduced synthesis of ATIII. The other novel lesion (Met251→Ile) was associated with a dysfunctional ATIII protein (type II ATIII deficiency) and is predicted to interfere either with a heparin-induced conformational change in the ATIII molecule or with docking to thrombin. A novel polymorphism (Tyr158→Cys) was also found to occur in several individuals of Scandinavian origin.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A multi-domain molecular model of factor IXa was constructed by comparative methods. The quaternary structure of the protein was assembled by docking individual domains through consideration of their shape complementarity, polaric properties and the location of cross-reacting material positive/negative (CRM+/−) variants on domain surfaces. Some 217 different missense mutations in the factor IX (F9) gene were then selected for study. Using maximum likelihood analysis, missense mutations affecting highly conserved amino acid residues of factor IX were shown to be 15–20 times more likely to result in haemophilia B than those affecting non-conserved residues. However, about one quarter of this increase in likelihood of clinical observation could be attributed to the magnitude of the amino acid exchange. Missense mutations in structurally conserved residues were found to be 2.1-fold more likely to come to clinical attention than those in structurally variable residues. Missense mutations in residues whose side chains were inwardly pointing were 3.6-fold more likely to be observed than those in surface residues. These observations imply a complex hierarchy of sequence/structure conservation in the protein. The severity of the clinical phenotype correlated with both the extent of the evolutionary sequence conservation of the residue at the site of mutation and the magnitude of the amino acid exchange. Further, the substitution of residues exhibiting minimal side chain solvent accessibility was associated disproportionately with severe haemophilia compared with that of surface residues. Clusters of CRM+ mutations were observed at factor IX-specific residues on the surface of the molecule. These clusters may reflect factor IX-specific docking interactions. The likelihood that a given factor IX mutation will come to clinical attention is therefore a complex function of the sequence characteristics of the F9 gene, the nature of the amino acid substitution, its precise location and immediate environment within the protein molecule, and its resulting effects on the structure and function of the protein.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We describe the detection of a novel missense mutation (Thr176→Ile) that is located at the neo N-terminus of activated protein C. The Thr176→Ile substitution leads to a type 1 deficiency state. Evidence is presented suggesting that this residue plays a role in pivoting the N-terminus of protein C to fold into the oxyanion hole.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A novel homozygous CCC→CTC (Pro 247→ Leu) substitution was detected in the protein C genes of a patient, born to consanguineous parents, with inherited type 1 protein C deficiency and recurrent venous thrombosis. Since one of four heterozygous relatives was also clinically affected, the condition appears to be inherited as an incompletely recessive trait in this family.
    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...