摘要:

Traditionally, the two major systems of intercellular communication (i.e. the nervous and endocrine systems) were considered separate functional and anatomical entities. Recent studies have provided evidence that the biochemical elements of these systems have common early phylogenetic origins and have suggested that, with the exception of their anatomical diversity, all the systems of intercellular communication are biochemically similar. On the basis of these findings, we suggest that the overlaps between the nervous and endocrine systems, the widespread tissue production of hormones, and other phenomena are now more easily understood.

ISSN:1663-2818    

DOI:10.1159/000182583

出版商:S. Karger AG    

年代:1992

数据来源: Karger

ISSN:1663-2818    

DOI:10.1159/000182584

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

Autoimmune polyglandular syndromes originally defined by Blizzard, Maclaren and Neufeld were classified into three constellations based on the clinical clustering of the various component diseases. Type I and type II are reasonably well circumscribed entities with type III being an ill-defined group. The autoimmune nature of these diseases has been based on the presence of lymphocytic infiltration in the affected gland, organ specific autoantibodies in the serum, cellular immune defects and an association with the HLA DR/DQ genes or immune response genes. Autoantibodies to the various endocrine and non-endocrine tissues not only offer a diagnostic clue to the autoimmune nature of diseases but also can be used to identify asymptomatic individuals who are at risk of developing other component diseases of the syndrome. In this review the clinical and serological spectrum of type I and II APS will be discussed.

ISSN:1663-2818    

DOI:10.1159/000182585

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

Multiple Endocrine Neoplasia (MEN) refers to the family of diseases characterized by hyperplasia and/or tumoral proliferation in various organs derived from the neural crest. MEN are transmitted in an autosomal dominant fashion in affected pedigrees with a high degree of penetrance. MEN 1 and MEN 2A/B loci have recently been mapped, respectively, to chromosomes 11 and 10 by linkage analysis using polymorphic DNA markers. These discoveries will lead (1) to a rapid understanding of the physiopathological pathway determining such syndromes and (2) to major clinical impact through the genetic screening.

ISSN:1663-2818    

DOI:10.1159/000182587

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

This review describes recent findings on the morphology, function and prognosis of lesions associated with the MEN 2 syndromes. Special emphasis is placed on the analogies and discrepancies between the hereditary and nonhereditary manifestations of the endocrine proliferations involved.

ISSN:1663-2818    

DOI:10.1159/000182588

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

The term ‘Multiple Endocrine Neoplasia’ (MEN) denotes a genetically determined syndrome characterized by the independent appearance of benign or malignant changes of several endocrine organs as well as occasional changes of neural, muscular and connective tissue. Three different forms have been identified: MEN 1 (Wermer’s syndrome) includes parathyroid hyperplasia in combination with pancreatic islet cell and pituitary tumours; MEN 2a (Sipple’s syndrome) includes medullary thyroid carcinoma in association with phaeochromocytoma and parathyroid hyperplasia; MEN 2b includes medullary thyroid carcinoma, phaeochromocytoma and mucosal neuromas. MEN syndrome is transmitted as an autosomal dominant trait with a high degree of penetrance. The changes in the individual glands appear to be causally and temporally independent of each other. A spectrum of pathological changes exist in the affected glands which range from hyperplasia to adenoma to carcinoma. The pathological process is almost always multicentric, often resulting in bilateral disease of organs. The appearance of an endocrine tumour known to be associated with MEN should alert the physician to the possibility of a MEN syndrome. When the possibility of such a syndrome exists, screening and long-term observation should be initiated to diagnose a carcinoma in its earliest stage, or before the development of clinical manifestations of hormone

ISSN:1663-2818    

DOI:10.1159/000182589

出版商:S. Karger AG    

年代:1992

数据来源: Karger

ISSN:1663-2818    

DOI:10.1159/000182590

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

The insulin-like growth factors (IGFs) mediate the anabolic effects of growth hormone or protein synthesis in muscle and skeletal tissues. Administering growth hormone to normal volunteers who have been made catabolic by caloric restriction improves the nitrogen balance. The studies described illustrate that administration of somatomedin-C (IGF-I) to catabolic normal volunteers also results in improved nitrogen balance and, unlike growth hormone, does not induce insulin resistance. Growth hormone was anabolic in patients with severe chronic obstructive lung disease and resulted in improved chest wall muscle strength. Both IGF-I and growth hormone have the potential to improve muscle mass and function in patients who are catabolic due to the severity of their underlying disease state.

ISSN:1663-2818    

DOI:10.1159/000182591

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

The secretion of growth hormone (GH) and the mass and distribution of body fat are linked through a complex series of interactions. There is increasing evidence that a GH/fat cycle exists and that elements of this cycle may possess regulatory functions. The essential elements of the cycle are: (1) GH-deficient individuals are often obese and lose body fat when they are treated; GH is lipolytic in vitro and causes an acute release of free fatty acids (FFA) when administered in vivo; (3) circulating FFA inhibit the pituitary release of GH by most secretagogues, including growth hormone releasing hormone, and (4) the obese state is characterized by a defect in GH release which can be reversed by weight loss.

ISSN:1663-2818    

DOI:10.1159/000182592

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

Human growth hormone (GH) increases estimates of whole body protein synthesis, but has little effect on the rates of proteolysis either post-absorptively or when absorption occurs during a meal. In contrast to insulin, GH stimulates protein synthesis in skeletal muscle tissue. Prednisone in high doses induces protein catabolism and has been used as a controlled model for catabolic illness. Prednisone increases the rates of proteolysis and amino acid oxidation, but has little effect on estimates of protein synthesis. The administration of high doses of GH together with prednisone prevents the protein catabolic effects of prednisone alone. Thus, GH may provide a new management strategy in patients with significant protein catabolic conditions.

ISSN:1663-2818    

DOI:10.1159/000182593

出版商:S. Karger AG    

年代:1992

数据来源: Karger