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
    Springer
    Diabetologia 28 (1985), S. 514-519 
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusions It seems that the methods described in 1971 have proved to be useful. Advances in other fields have greatly simplified their adoption. The availability of genetically engineered human proteins, together with monoclonal antibodies, suggests that the next few years will see a very large growth in the use of highly specific immunoradiometric assays for a wide variety of polypeptides, many of relevance to research in diabetes. Perhaps we may even finally describe what is really happening to plasma insulin and its related polypeptides during the different stages and in the different types of diabetes. Advances in our understanding of the basic mechanisms of the immune system, together with their role in diabetes, suggest that immunological methods and concepts will be at least as relevant to the subject in the next 25 years.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-0428
    Keywords: Keywords Type II diabetes mellitus, preterm infant, childhood, glucose, insulin, birth weight, growth.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. To test the hypothesis that small size for gestation and poor postnatal growth in preterm infants is associated with higher fasting and post-load plasma glucose and insulin concentrations at 9–12 years of age.¶Methods. Prospective follow-up at 9–12 years of 385 preterm children with birth weight less than 1850 g, who had anthropometry recorded at birth, 18 months and 7 years. Fasting plasma glucose, insulin, proinsulin and 32,33 split proinsulin concentrations and glucose and insulin concentrations 30 min after a standard glucose load were measured.¶Results. Post-load glucose concentrations were negatively related to birth weight, independently of gestation or subsequent growth. Fasting split proinsulin and 30-min insulin concentrations were highest in children who showed the greatest increase in weight centile between birth and current follow-up, regardless of gestation. When weight during childhood was included, birthweight centile was, however, no longer statistically significant: concentrations of fasting, split, proinsulin and 30-min insulin were highest in those children who had shown the greatest increase in weight centile between 18 months of age and current follow-up, with no evidence of a greater effect in those who were smallest at 18 months.¶Conclusion/interpretation. Our findings suggest that fetal growth influences plasma glucose 30 min after a glucose load in preterm children at 9–12 years. In contrast, childhood weight gain is the most important factor influencing insulin concentrations and this effect is the same regardless of early size. [Diabetologia (2000) 43: 714–717]
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-2013
    Keywords: Cultured central neurones ; ATP-sensitive ; Patch-clamp ; Ion channels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract ATP-sensitive channels were observed in isolated inside-out membrane patches from rat cultured central neurones. Two types of ATP-sensitive K+ channels were present in cortical neurones, one which had its open-state probability increased, the other its open-state probability decreased by application of ATP to the cytoplasmic membrane surface. Another, ATP-sensitive channel differing in ion conductance from all previously reported ATP-sensitive channels was also seen in patches from cortical neurones. This channel was noselective with respect to Na+, K+ and Cl− ions and ATP produced a “flickery” type of block. The non-hydrolysable analogue, AMPPNP, did not mimic ATP and prevented ATP action Preliminary experiments indicate that similar, but not, identical ATP-sensitive channels exist in cerebellar neurones
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-2013
    Keywords: Insulinoma cell line ; Patch clamp ; Cation channel ; Calcium dependence ; ATP sensitive
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A calcium-acivated non-selective cation channel was observed in isolated plasma membrane patches from an insulin-secreting cell line (CRI-Gl). The conductance of the channel was approximately 25 pS with identical (140 mM KCl) solutions on either side of the membrane. However, some rectification was observed (smaller outward current) when sodium ions were present extracellularly. The channel was inactive on exposure to an intracellular calcium concentration of 10−6 M and required high (greater than 10−4 M) concentrations for a significant degree of activation. The open-state probability of the channel was voltage dependent, increasing with membrane depolarization. Analysis of single channel kinetics indicated that there were at least two open and two closed states. Application of ATP to the cytoplasmic membrane surface reduced the open state probability in a dose-dependent manner. The channel activity was blocked by quinine and 4-AP but was insensitive to TEA, TTX and amiloride. It is not clear what role this channel might play in the complex electrical activity of β-cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-0428
    Keywords: Proinsulin ; insulin ; C-peptide ; identical twins ; Type 1 (insulin-dependent) diabetes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Glucose tolerance and insulin secretion were studied in two groups of non-diabetic identical twins of recently-diagnosed Type 1 (insulin-dependent) diabetic patients: (1) a group of 5 twins with islet cell antibodies, and (2) a group of 6 twins without. Despite similar fasting glucose, insulin and C-peptide concentrations both groups of twins had significantly higher fasting proinsulin concentrations than the control group (p〈0.05). The twins with complement-fixing islet cell antibodies had reduced glucose tolerance and clearance, whilst the twins without islet cell antibodies did not. Neither group of twins showed any abnormality in insulin, C-peptide or proinsulin response to oral or intravenous glucose. We conclude that increased fasting proinsulin levels precede abnormalities of insulin secretion, and are an early indication of minor B-cell damage in these twins irrespective of their risk of developing diabetes.
    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...