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  • glucose  (2)
  • primary gastric lymphoma  (2)
  • 15N-Glycine  (1)
  • 1
    ISSN: 0303-7207
    Keywords: diabetic rat islets ; glucagon ; glucose ; somatostatin secretion ; theophylline
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1569-8041
    Keywords: bacterial flora ; Helicobacter pylori ; immunohisochemistry ; MALT ; primary gastric lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Primary gastric non-Hodgkin's lymphomas possibly develop in response to local infection by Helicobacter pylori (H. pylori). We investigated the presence of H. pylori and non–H. pylori flora histologically in small- and large-cell primary gastric lymphoma using a specific staining method. Materials and methods: Specimens of 52 cases of primary gastric lymphoma(17 small cell, 35 large cell) were stained with modified Giemsa (MG) and immunohistochemically using a polyclonal antibody against H. pylori (IHC). Results: Thirty-two cases (61.5%) (small cell 76% versus large cell 53%,P 〉 0.05) showed immunoreactivity for H. pylori in the mucosa surrounding the tumor. Remarkable, there waslocalization of H. pylori in the neck of the gastric glands in 3 cases.Non– H. pylori flora was seen in 35 cases (76.3%) (small cell53% versus large cell 74%,P 〉 0.05). In 20cases, this non– H. pylori flora was mixed with H. pylori. Five cases showed no bacterial flora at all. Conclusions: (1)Using immunohistochemistry, the prevalence of gastriclymphoma cases with H. pylori (61.5%) approximates that of H. pylori in the normal population. (2) No statistical difference was found between the occurrence of H. pylori and non–H. pyloribacterial flora in small- versus large-cell lymphoma. (3) Our results suggest that H. pylori may not be the only etiologic factor in primary gastric lymphoma.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1569-8041
    Keywords: bacterial flora ; Helicobacter pylori ; immunohisochemistry ; MALT ; primary gastric lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Primary gastric non-Hodgkin's lymphomas possibly develop inresponse to local infection by Helicobacter pylori (H. pylori). Weinvestigated the presence of H. pylori and non–H. pylori florahistologically in small- and large-cell primary gastric lymphoma using aspecific staining method. Materials and methods: Specimens of 52 cases of primary gastric lymphoma(17 small cell, 35 large cell) were stained with modified Giemsa (MG) andimmunohistochemically using a polyclonal antibody against H. pylori (IHC). Results: Thirty-two cases (61.5%) (small cell 76% versuslarge cell 53%,P 〉 0.05) showed immunoreactivityfor H. pylori in the mucosa surrounding the tumor. Remarkable, there waslocalization of H. pylori in the neck of the gastric glands in 3 cases.Non– H. pylori flora was seen in 35 cases (76.3%) (small cell53% versus large cell 74%,P 〉 0.05). In 20cases, this non– H. pylori flora was mixed with H. pylori. Five casesshowed no bacterial flora at all. Conclusions: (1)Using immunohistochemistry, the prevalence of gastriclymphoma cases with H. pylori (61.5%) approximates that of H. pylori in the normal population. (2) No statistical difference was foundbetween the occurrence of H. pylori and non–H. pyloribacterial flora in small- versus large-cell lymphoma. (3) Our resultssuggest that H. pylori may not be the only etiologic factor in primarygastric lymphoma.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: 15N-Glycine ; Apolipoprotein-B-Synthesis ; Low density lipoprotein ; Very low density lipoprotein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In vivo synthesis of apolipoprotein B 100 (ApoB) was recently determined in man using stable isotopes. With this procedure we analyzed (1) the effect of fasting on synthesis of ApoB from very low density lipoprotein (VLDL) and (2) tracer enrichment in low density lipoprotein (LDL). After a 36-hour fasting period and in the post-absorptive state 4 healthy subjects were given a priming dose (8.7 µmol/kg) of15N glycine followed by a constant infusion (10 µmol/kg/h for 8 h) to achieve 5% tracer enrichment in the plasma pool of glycine. The K-values, i.e. fractional synthetic rates/hr of ApoB from VLDL were 0.53±0.26 vs. 0.43±0.16 (p〉0.05). Tracer enrichment in ApoB from LDL at the end of the infusions was 0.19% vs. 1.46% in ApoB from VLDL. The results indicate that (1) in young healthy postabsorptive individuals about 40% of ApoB from VLDL in plasma is synthesized per hour, (2) fasting does not materially affect fractional ApoB synthesis and (3) at 5%15N enrichment in plasma glycine, tracer enrichment in ApoB from LDL is at the lower limit of detection for the procedure employed.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0428
    Keywords: Isolated islets ; insulin release ; glucagon ; glucose ; cyclic adenosine monophosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Glucose stimulation increased the cAMP content of collagenase-isolated rat pancreatic islets fourfold above baseline values. The elevation was transient, lasting about 5 min, and was dose-dependent. Insulin release continued at a constant rate throughout the incubation. — Glucagon, in the absence of glucose, increased cAMP for about 1 min, but only slightly, and had no effect on insulin release. In the presence of glucose, however, glucagon enhanced islet cAMP content 15-fold and increased the release of insulin. Glucagon was most effective at high glucose concentrations (16.6 and 25 mM). — This indicates that glucagon is critically dependent on the presence of glucose in order to increase the islet cAMP content and to stimulate insulin release. The inability of glucagon to generate sufficient cAMP in the absence of glucose might be one of the reasons why the hormone is a potentiator rather than an initiator of insulin release.
    Type of Medium: Electronic Resource
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