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  • Immunohistochemistry  (5)
  • Coagulation  (3)
  • Malnutrition  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 70 (1992), S. 478-486 
    ISSN: 1432-1440
    Keywords: Liver cirrhosis ; Liver transplantation ; Malnutrition ; Nutritional state ; Marasmus ; Kwashiorkor ; Nutritional assessment ; Liver function ; Energy expenditure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of this article is to present detailed data on the nutritional assessment in cirrhotic patients. The exact frequency and types of malnutrition, its associations with the aetiology of liver disease, liver dysfunction and clinical staging in liver cirrhosis are unknown. A new classification system is presented which may help to suggest some interventional guidelines. Physical (anthropometry, 24-h urinary creatinine excretion, bioelectrical impedance analysis (BIA), total body potassium counting, ultrasound examination) and metabolic (indirect calorimetry) assessment of nutritional status was therefore performed in 123 patients with liver cirrhosis, who were considered as potential candidates for liver transplantation. Data were related to the clinical, biochemical, histological and prognostic data of liver disease. Of our patients 65% showed some signs of protein-calorie malnutrition as indicated by low body cell mass, reduced serum albumin concentrations or abnormal skinfold thickness. Of these 34% were considered as “kwashiorkor-like” (normal body composition, serum albumin 〈35 g/1), and 18% were “marastic” (reduced body weight, body cell mass, and fat mass). However, 49% of the malnourished group had reduced body cell mass in association with increased fat mass and frequently presented with a normal body weight (“mixed” or “obese” type). Protein-calorie malnutrition did not correlate with the aetiology of the disease and biochemical parameters of liver function. Malnutrition was observed at all clinical stages but was more frequently seen at advanced stages. We conclude that malnutrition associated with liver cirrhosis is not a clear phenomenon. Its clinical presentation is heterogenous and not reflected by the histological or biochemical parameters of liver disease. Since malnutrition is rarely diagnosed, early and detailed nutritional assessment in all patients with liver disease is important.
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  • 2
    ISSN: 1432-0533
    Keywords: Brain ; Cerebral ischemia ; Gerbil ; Immunohistochemistry ; Hippocampus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Anesthetized Mongolian gerbils were subjected to 5-min ischemia and 8 h of recirculation. Vibratiom sections were taken for studying changes in ornithine decarboxylase (ODC) immunoreactivity using an antiserum to ODC, and tissue samples were taken for measuring ODC activity. After 5-min ischemia and 8-h recirculation ODC activity increased 11.5-, 5.9-, and 7.9-fold in the cerebral cortex, striatum and hippocampus, respectively (P≤0.05 to 0.01). In the cortex, striatum and hippocampus of control animals immunoreactivity was low but clearly above the detection limit. The reaction was confined to neurons. After 5-min ischemia and 8-h recirculation a sharp increase in immunoreactivity was observed confined to neurons, indicating that the postischemic activation of polyamine metabolism is a neuronal response to ischemia. The immunoreactivity was markedly increased in the perinuclear cytoplasm and the dendrites. In the striatum the density of neurons exhibiting a sharp increase in immunoreactivity was more pronounced in the lateral than in the ventral part. In the hippocampus a strong reaction was present in all subfields but the CA1 subfield was particularly affected. The present study demonstrates for the first time that biosynthesis of a protein is markedly activated during the first 24 h of recirculation after 5-min cerebral ischemia of gerbils even in the vulnerable CA1 subfield, in which the overall protein synthesis is sharply reduced at the same time. Studying polyamine metabolism after ischemia may, thus, provide new information about the basic molecular mechanisms responsible for the altered gene expression after metabolic stress.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 82 (1990), S. 25-32 
    ISSN: 1432-1106
    Keywords: Retina ; Development ; In situ hybridization ; Gene expression ; Immunohistochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The expression of the synapsin I gene was studied during postnatal development of the rat retina at the mRNA and protein levels. In situ hybridization histochemistry showed that synapsin I mRNA was expressed already in nerve cells in the ganglion cell layer of the neonatal retina, while it appeared in neurons of the inner nuclear layer from postnatal day 4 onward. Maximal expression of synapsin I mRNA was observed at P12 in ganglion cells and in neurons of the inner nuclear layer followed by moderate expression in the adult. At the protein level a shift of synapsin I appearance was observed from cytoplasmic to terminal localization during retinal development by immunohistochemistry. In early stages (P4 and P8), synapsin I was seen in neurons of the ganglion cell layer and in neurons of the developing inner nuclear layer as well as in the developing inner plexiform layer. In the developing outer plexiform layer synapsin I was localized only in horizontal cells and in their processes. Its early appearance at P4 indicated the early maturation of this cell type. A shift and strong increase of labelling to the plexiform layers at P12 indicated the localization of synapsin I in synaptic terminals. The inner plexiform layer exhibited a characteristic stratified pattern. Photoreceptor cells never exhibited synapsin I mRNA or synapsin I protein throughout development.
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  • 4
    ISSN: 1432-1238
    Keywords: Pentoxifylline ; Critically ill ; Sepsis ; Trauma ; Inflammation ; Coagulation ; Platelet function ; Aggregometry ; Collagen ; Epinephrine ; Adenosine diphosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective The methylxanthine derivative pentoxifylline (PTX) is one of those promising substances which are under current investigation to modify or limit inflammatory response. Antiaggregation activity has also been described that may contribute to the beneficial effects of this substance. Long-term effects on platelet function have not been elucidated yet. Design Prospective, randomized study. Setting Clinical investigation on a surgical intensive care unit of a university hospital. Patients 26 trauma patients and 26 patients suffering from sepsis secondary to major operations were consecutively studied. Interventions The patients prospectively received either 1.5 mg/kg per h pentoxifylline continuously for 5 days (after a loading dose of 600 mg) (trauma-PTX,n=13; sepsis-PTX,n=13) or saline solution as placebo (trauma-control;n=13; sepsis-control,n=13). Measurements On the day of admission (trauma patients) or day of the diagnosis of sepsis and at 12:00 p.m. during the next 5 days, platelet aggregation induced by adenosine diphosphate (ADP 2.0 μmol/l), collagen (4 μl/ml), and epinephrine (25 μmol/l) was determined by a turbidimetric method from arterial blood samples. Standard coagulation screen was also monitored. Main results In untreated trauma and sepsis patients, maximum platelet aggregation induced by all three agonists decreased during the first few days after inclusion in the study [trauma: ADP −17.1±8.0 rel% (% change from baseline); sepsis: ADP −26.1±5.6 rel%]. In due course, maximum platelet aggregation recovered, reaching the baseline value or even exceeding it (trauma patients). In the PTX-treated patients, platelet aggregation was significantly less impaired (sepsis group: ADP −4.4±3.3 rel%) or even increased beyond baseline values in the first few days of the study (trauma group: ADP 16.1±8.0 rel%). Fibrinogen plasma levels were lower in the non-treated control groups (p〈0.05) than in the PTX groups. Conclusions Continuous infusion of PTX for 5 days did not impair platelet function in critically ill patients. In both trauma and sepsis patients, the usual deterioration in platelet function was even attenuated, which may be due to the effects of PTX on cytokine release (e.g., reduction in tumor necrosis factor and interleukin-1), improvement in microcirculation, or additional fibrinolytic effects.
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  • 5
    ISSN: 1432-1440
    Keywords: Malnutrition ; HIV-infection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Study objective: To determine forms of malnutrition and basal metabolism at different stages of immunological impairment in clinically stable patients infected with Human Immunodeficiency Virus (HIV).Design: Cross sectional study.Setting: 53 outpatients with HIV-infection classified according to the Walter Reed staging system (WR1 to WR6).Measurements and main results: 87% of the patients showed some evidence of malnutrition. Reduced body weight was found in 53%, 68% and 25% had decreases in fat and body cell mass, 17% had visceral protein deficiency, whereas extracellular mass and serum triglyceride concentrations were increased in 58% and 30%, respectively. Reduced serum albumin and transferrin closely paralleled immunological depression, whereas alterations in body composition were manifest early during HIV-infection (WR3) and remained unchanged during the transition to the Acquired Immune Deficiency Syndrome itself. Resting metabolic rate increased from WR1 to WR3; it remained within the expected range during later stages (WR4-WR6), but was not appropriately reduced in response to the loss in body cell mass.Conclusions: HIV-infected patients display both, calorie and protein malnutrition. Immunological depression was independent of loss of body mass, but was closely associated to decreases in serum albumin values. Nutritional assessment and intervention should therefore be performed at an early stage of HIV-infection.
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  • 6
    ISSN: 1432-1238
    Keywords: Key words Pentoxifylline ; Critically ill ; Sepsis ; Trauma ; Inflammation ; Coagulation ; Platelet function ; Aggregometry ; Collagen ; Epinephrine ; Adenosine diphosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: The methylxanthine derivative pentoxifylline (PTX) is one of those promising substances which are under current investigation to modify or limit inflammatory response. Antiaggregation activity has also been described that may contribute to the beneficial effects of this substance. Long-term effects on platelet function have not been elucidated yet. Design: Prospective, randomized study. Setting: Clinical investigation on a surgical intensive care unit of a university hospital. Patients: 26 trauma patients and 26 patients suffering from sepsis secondary to major operations were consecutively studied. Interventions: The patients prospectively received either 1.5 mg/kg per h pentoxifylline continuously for 5 days (after a loading dose of 600 mg) (trauma-PTX, n=13; sepsis-PTX, n=13) or saline solution as placebo (trauma-control; n=13; sepsis-control, n=13). Measurements: On the day of admission (trauma patients) or day of the diagnosis of sepsis and at 12:00 p.m. during the next 5 days, platelet aggregation induced by adenosine diphosphate (ADP 2.0 μmol/l), collagen (4 μl/ml), and epinephrine (25 μmol/l) was determined by a turbidimetric method from arterial blood samples. Standard coagulation screen was also monitored. Main results: In untreated trauma and sepsis patients, maximum platelet aggregation induced by all three agonists decreased during the first few days after inclusion in the study [trauma: ADP–17.1±8.0 rel% (% change from baseline); sepsis: ADP –26.1±5.6 rel%]. In due course, maximum platelet aggregation recovered, reaching the baseline value or even exceeding it (trauma patients). In the PTX-treated patients, platelet aggregation was significantly less impaired (sepsis group: ADP –4.4±3.3 rel%) or even increased beyond baseline values in the first few days of the study (trauma group: ADP 16.1±8.0 rel%). Fibrinogen plasma levels were lower in the non-treated control groups (p〈0.05) than in the PTX groups. Conclusions: Continuous infusion of PTX for 5 days did not impair platelet function in critically ill patients. In both trauma and sepsis patients, the usual deterioration in platelet function was even attenuated, which may be due to the effects of PTX on cytokine release (e.g., reduction in tumor necrosis factor and interleukin-1), improvement in microcirculation, or additional fibrinolytic effects.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 24 (1998), S. 28-36 
    ISSN: 1432-1238
    Keywords: Key words Critically ill ; Sepsis ; Trauma ; Volume therapy ; Albumin ; Hydroxyethylstarch solution ; Macrocirculation ; Microcirculation ; Pulmonary function ; Renal ; function ; Coagulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: There are still several concerns about the extensive and prolonged use of hydroxyethylstarch solution (HES) in critically ill patients. The effects of volume replacement with HES over 5 days on hemodynamics, laboratory data, and organ function were compared with volume therapy using human albumin (HA). Design: Prospective, randomized study. Setting: Clinical investigations on a surgical intensive care unit (ICU) of a university hospital. Patients: 150 traumatized patients (injury severity score 〉 15) and 150 postoperative patients with sepsis were analyzed. Interventions: Either 10 % low-molecular weight HES (HES-trauma, n = 75; HES-sepsis, n = 75) or 20 % HA (HA-trauma, n = 75; HA-sepsis, n = 75) was given for 5 days to maintain the pulmonary capillary wedge pressure (PCWP) between 12 and 15 torr. The entire management of therapy of the patients was performed by physicians who were not involved in the study and blinded to the infusion regimen. Measurements and results: In addition to extensive cardiorespiratory monitoring, several routine laboratory parameters for assessing pulmonary, renal, hepatic, and coagulation function were analyzed from arterial blood samples on the day of admission to the ICU and on the day of sepsis diagnosis, respectively (“baseline” value) and daily over the following 5 days. Mortality during and after the study did not differ significantly between the infusion groups. There were also no differences between the incidence of pulmonary, renal, or hepatic failure in the two subgroups. Mean arterial pressure, heart rate, and PCWP were similar in both subgroups, whereas cardiac index, oxygen delivery index, oxygen consumption index, and the ratio between the partial pressure of oxygen in arterial blood and fractional inspired oxygen were higher in the HES- than in the HA-treated groups. Standard coagulation parameters did not differ, albumin concentration increased significantly in both HA groups, and lactate concentrations decreased only in the HES-sepsis patients (from 2.8 ± 0.5 to 1.5 ± 0.4 mg/dl). Volume replacement using albumin was significantly (p 〈 0.001) more costly than therapy with HES. Conclusions: Volume therapy with 10 % HES for 5 days in the ICU patient showed no disadvantages compared with an infusion regimen using 20 % albumin. Volume replacement using HES may even be associated with improved hemodynamics. HES appears to be a valuable and significantly cheaper alternative to albumin – even for prolonged volume therapy in the critically ill patient.
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  • 8
    ISSN: 1434-0879
    Keywords: Bladder cancer ; Urothelium ; CD44V2 ; Alternative splicing ; Immunohistochemistry ; Diagnostic marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract CD44 is the principal cell surface receptor for hyaluronate. Variant forms of the receptor, produced by alternative splicing, have been found to be associated with tumor progression in a variety of cancers. Based on investigations at the RNA level, it has recently been proposed that expression of CD44 variant V2 was present in urothelial cancer but not in normal urothelium. Since a distinctive marker for urothelial cancer would be extremely useful, frozen sections of normal urothelium and urothelial cancer were examined for expression of standard CD44 and CD44V2. Frozen sections of specimens of 35 patients with transitional cell carcinoma of the bladder, 16 specimens of normal bladder and 5 ureters were examined. Immunohistochemical staining was performed using a polyclonal antibody to CD44V2 (PAB CD44V2), a monoclonal antibody to CD44V2 (MAB CD44V2) and a monoclonal antibody to CD44S (MAB CD44S). CD44V2 and CD44S were also measured in lysates of urine sediments from 21 patients by enzyme-linked immunoabsorbent assay (ELISA). All investigated transitional cell carcinomas expressed CD44V2. There was no differentiation between invasive and noninvasive carcinoma. CD44V2 was also expressed in normal urothelium. Standard CD44 was expressed by the transitional cell carcinoma, normal urothelium, musculature and interstitial tissue. The amount of CD44V2 and CD44S in lysates of urine sediments is not correlated to diagnosis. In contrast to investigations at the RNA level, CD44V2 on the protein level seems not to be a distinctive marker for urothelial cancer. Therefore, CD44V2 will not be a useful diagnostic marker for detection of transitional cell carcinoma.
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  • 9
    ISSN: 1432-0878
    Keywords: Neurosecretion ; Catecholamines ; HPLC ; Immunohistochemistry ; Glyoxylic acid fluorescence ; Ophryotrocha puerilis (Annelida)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the posterior part of the brain of the protandric polychaete Ophryotrocha puerilis neurosecretory cells form prominent axon terminals. The terminals are arranged in two complexes. The perikarya of these presumably monopolar neurons are scattered in the anterior part of the cerebral perikaryal layer. In females the terminals store large amounts of neurosecretory material. It has been suggested earlier that neurosecretions of the terminals may play a role during sex reversal from females to males. Application of histamine caused the release of neurosecretory material from the respective terminals in females. However, this discharge was not followed by sex reversal. Application of reserpine had no influence on the terminals. Neither by in vivo observation nor by ultrastructural analysis any effect of reserpine on the terminal complexes could be observed. In isolated terminals filled with neurosecretory material from females, catecholamines could not be detected by HPLC. Also, polyclonal antibodies against dopamine did not stain the terminal complexes. Furthermore, the complexes did not develop any fluorescence after glyoxylic acid treatment. Therefore, the present results contradict the hypothesis that the neurosecretory material of the respective axon terminals is catecholaminergic and that it is involved in sex differentiation. The function of the secretory neurons studied here remains unclear.
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  • 10
    ISSN: 1435-2451
    Keywords: Esophageal carcinoma ; Gastric carcinomaCancer cachexia ; Malnutrition ; Body composition ; Metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zur Frage des Einflusses des präoperativen Gewichtsverlusts auf die metabolische Adaptation an das Operationstrauma und auf die Häufigkeit postoperativer Komplikationen wurden 44 Patienten mit Karzinomen des oberen Gastrointestinaltrakts (23 Ösophagus-und 21 Magenkarzinome) 10–14 Tage prä- und postoperativ im Ernährungsstatus, der Körperzusammensetzung und der Stoffwechsellage untersucht. Die Patienten wurden entsprechend dem präoperativen Gewichtsverlust in den letzten 6 Monaten vor der stationären Aufnahme in 3 Gruppen unterteilt: I: Abnahme um 0–5% des Ausgangsgewichts, II: 5–10% und III: 〉 10%. 50% der Patienten wiesen präoperativ keinen oder nur einen geringen Gewichtsverlust auf. Auch bei hohem Gewichtsverlust wurde das jeweils errechnete ideale Körpergewicht nicht unterschritten. Körperzellund Fettmasse waren in Gruppe III signifikant (p 〈 0,05) niedriger als in Gruppe I. Da der Ruheenergieverbrauch bei den meisten Patienten nicht erhöht war, müssen als Ursache des Gewichtsverlusts Tumorstenose und Dysphagie, jedoch nicht ein Hypermetabolismus, angesehen werden. Mehr als 50% des Energiebedarfs wurden durch Lipidoxidation gedeckt. Insgesamt erfüllten selbst die Patienten in Gruppe III nicht die Kriterien einer Mangelernährung. Der perioperative Gewichtsverlust war in der Gruppe III am niedrigsten (1,6 ± 4,9 kg) im Vergleich zu den Gruppen I und II mit 2,9 ± 1,7 bzw. 5,0 ± 6,9 kg. In allen Gruppen wurde eine Erhöhung des Energieverbrauchs und der Fettoxidationsrate, einhergehend mit einer Hemmung der Glukoseoxidation, beobachtet. Dies resultierte in einer Verminderung der Körperzellmasse. Unabhängig vom präoperativen Gewichtsverlust kam es bei 8 Patienten zu schwerwiegenden Komplikationen mit Pneumonie in 6 und Anastomoseninsuffizienz in 2 Fällen. Kein Patient verstarb. Die metabolische Reaktion auf das Operationstrauma ist auch bei Patienten mit ausgeprägtem präoperativem Gewichtsverlust adäquat. Diese Patienten bleiben kompensiert und der präoperative Gewichtsverlust ist ohne signifikanten Einfluß auf die postoperative Komplikationsrate.
    Notes: Summary Body composition and energy expenditure were investigated before and 10–14 days after surgery in 44 patients with upper gastrointestinal cancer (23 esophageal and 21 gastric cancer) in order to assess the impact of preoperative weight loss on metabolic adaptation to the surgical trauma and on postoperative complications. Patients were divided in three groups with I: 0–5%, II: 5–10% and III: 〉 10% preoperative weight loss related to the usual body weight. 50% of the patients presented with no or just minor weight loss. Even in case of weight loss 〉 10% no decrease below the ideal body weight was observed. Body cell mass and fat mass were significantly (p 〈 0.05) reduced in group III when compared with I. Since energy expenditure and substrate oxidation rates were rather normal in most patients weight loss was considered to be due to tumor related stenosis and dysphagia. More than 50% of the energy requirements were gained from fat oxidation. General criteria of malnutrition were not fulfilled. Perioperative weight loss was lowest (1.6 ± 4.9 kg) in patients of group III related to group I (2.9 ± 1.7 kg) and II (5.0 ± 6.9 kg). Similar elevation of energy expenditure and lipid oxidation with concomitant reduction in glucose oxidation was observed in all groups of patients. This led to a similar decrease of body cell mass. Independant of preoperative weight loss major complications occurred in 8 cases — pneumonia in 6 and leakage of the anastomosis in 2 patients; no patient died. From this study can be concluded that with regard to perioperative weight loss the metabolic response to surgical trauma is adequate even in patients with marked preoperative weight loss. These patients remain compensated and preoperative weight loss is without major effect on postoperative complication rate.
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