Supplementary Table 1. Clinico-Pathologic Features of Patients with Pancreatic Neuroendocrine Tumors Associated with Cushing’S Syndrome
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Regulation of the Gastrin Promoter by Epidermal Growth Factor and Neuropeptides JUANITA M
Proc. Nati. Acad. Sci. USA Vol. 86, pp. 3036-3040, May 1989 Biochemistry Regulation of the gastrin promoter by epidermal growth factor and neuropeptides JUANITA M. GODLEY AND STEPHEN J. BRAND Gastrointestinal Unit, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Boston, MA 02114 Communicated by Kurt J. Isselbacher, December 30, 1988 ABSTRACT The regulation of gastrin gene transcription gastrin secretion (12, 13), the effect of GRP on gastrin gene was studied in GH4 pituitary cells transfected with constructs expression has not been reported. Antral G cells are also comprised of the first exon of the human gastrin gene and inhibited by the paracrine release of somatostatin from various lengths of 5' regulatory sequences ligated upstream of adjacent antral D cells (14), and local release of somatostatin the reporter gene chloramphenicol acetyltransferase. Gastrin inhibits gastrin gene expression as well as gastrin secretion reporter gene activity in GH4 cells was equal to the activity of (15). a reporter gene transcribed from the endogenously expressed In contrast to the detailed studies on gastrin secretion, the growth hormone promoter. The effect of a variety of peptides regulation of gastrin gene expression has not been well on gastrin gene transcription including epidermal growth investigated. The cellular mechanisms controlling gastrin factor (normally present in the gastric lumen), gastrin- secretion have been analyzed using isolated primary G cells releasing peptide, vasoactive intestinal peptide, and somato- (12, 13); however, the limited viability of these cells has statin (present in gastric nerves) was assessed. Epidermal precluded their use in studying the regulation of gastrin gene growth factor increased the rate ofgastrin transcription almost transcription using DNA transfection techniques. -
Adrenocorticotrophic and Melanocyte-Stimulating Peptides in the Human Pituitary by ALEXANDER P
Biochem. J. (1974) 139, 593-602 593 Printed in Great Britain Adrenocorticotrophic and Melanocyte-Stimulating Peptides in the Human Pituitary By ALEXANDER P. SCOTT and PHILIP J. LOWRY* Department ofChemical Pathology, St. Bartholomew's Hospital, London EC1A 7BE, U.K. and CIBA Laboratories, Horsham, Sussex RH12 4AB, U.K. (Received 7 December 1973) The adrenocorticotrophic and melanocyte-stimulating peptides of the human pituitary were investigated by means of radioimmunoassay, bioassay and physicochemical pro- cedures. Substantial amounts of adrenocorticotrophin and a peptide resembling /8-lipotrophin were identified in pituitary extracts, but a-melanocyte-stimulating hormone, ,B-melanocyte-stimulating hormone and corticotrophin-like intermediate lobe peptide, which have been identified in thepars intermedia ofpituitaries from other vertebrates, were not found. The absence of fJ-melanocyte-stimulating hormone appears to contradict previous chemical and radioimmunological studies. Our results suggest, however, that it is not a natural pituitary peptide but an artefact formed by enzymic degradation of ,6-lipotrophin during extraction. Melanocyte-stimulating and corticotrophic pep- extraction of human pituitaries for growth hormone tides have been identified in the pituitaries of all (Dixon, 1960). Its stucture was determined by Harris vertebrate species studied, and several have been (1959) and shown to be similar to ,B-MSH isolated isolated and characterized. They belong to two from other species, except for the presence of an structually related classes, namely those related to extra four amino acids at the N-terminus. The adrenocorticotrophin (ACTH) including ACTH, presence of sufficient amounts of 8-MSH in human a-melanocyte-stimulating hormone (a-MSH) and pituitaries to account alone for the bulk of the 'corticotrophin-like intermediate lobepeptide' ACTH melanocyte-stimulating activity in the pituitary (18-39) peptide (CLIP), and others related to fi- extracts was shown by radioimmunoassay (Abe et al., melanocyte-stimulating hormone (,B-MSH) including 1967b). -
Expression and Localization of Gastrin Messenger RNA and Peptide in Spermatogenic Cells
Expression and localization of gastrin messenger RNA and peptide in spermatogenic cells. M Schalling, … , T Hökfelt, J F Rehfeld J Clin Invest. 1990;86(2):660-669. https://doi.org/10.1172/JCI114758. Research Article In previous studies we have shown that the gene encoding cholecystokinin (CCK) is expressed in spermatogenic cells of several mammalian species. In the present study we show that a gene homologous to the CCK-related hormone, gastrin, is expressed in the human testis. The mRNA hybridizing to a human gastrin cDNA probe in the human testis was of the same size (0.7 kb) as gastrin mRNA in the human antrum. By in situ hybridization the gastrinlike mRNA was localized to seminiferous tubules. Immunocytochemical staining of human testis revealed gastrinlike peptides in the seminiferous tubules primarily at a position corresponding to spermatids and spermatozoa. In ejaculated spermatozoa gastrinlike immunoreactivity was localized to the acrosome. Acrosomal localization could also be shown in spermatids with electron microscopy. Extracts of the human testis contained significant amounts of progastrin, but no bioactive amidated gastrins. In contrast, ejaculated sperm contained mature carboxyamidated gastrin 34 and gastrin 17. The concentration of gastrin in ejaculated human spermatozoa varied considerably between individuals. We suggest that amidated gastrin (in humans) and CCK (in other mammals) are released during the acrosome reaction and that they may be important for fertilization. Find the latest version: https://jci.me/114758/pdf Expression and Localization of Gastrin Messenger RNA and Peptide in Spermatogenic Cells Martin Schalling,* Hhkan Persson,t Markku Pelto-Huikko,*9 Lars Odum,1I Peter Ekman,I Christer Gottlieb,** Tomas Hokfelt,* and Jens F. -
Effect of Atropine on Vagal Release of Gastrin and Pancreatic Polypeptide
Effect of Atropine on Vagal Release of Gastrin and Pancreatic Polypeptide MARK FELDMAN, CHARLES T. RICHARDSON, IAN L. TAYLOR, and JOHN H. WALSH, Departments of Internal Medicine, Veterans Administration Hospital, Dallas, Texas 75216; University of California at Los Angeles Health Science Center, Los Angeles, California 90093; and The University of Texas Health Science Center at Dallas, Southwestern Medical School, Dallas, Texas 75235 A B S TRA C T We studied the effect of several doses of the rise in serum gastrin concentration induced by in- atropine on the serum gastrin and pancreatic poly- sulin hypoglycemia was further increased by atropine peptide responses to vagal stimulation in healthy premedication (1). In addition, several workers have human subjects. Vagal stimulation was induced by shown that atropine increases the serum gastrin con- sham feeding. To eliminate the effect of gastric acidity centration after an eaten meal (2-4). These observa- on gastrin release, gastric pH was held constant (pH 5) tions, together with the fact that basal and postprandial and acid secretion was measured by intragastric titra- gastrin levels rise after vagotomy (5-7), have led to tion. Although a small dose of atropine (2.3 ,ug/kg) speculation that the vagus nerve can inhibit, as well as significantly inhibited the acid secretory response and stimulate, gastrin release. completely abolished the pancreatic polypeptide re- For several reasons, however, none of these observa- sponse to sham feeding, this dose of atropine signifi- tions proves that the vagus nerve actually inhibits cantly enhanced the gastrin response. Higher atropine gastrin release under normal circumstances. First, doses (7.0 and 21.0,g/kg) had effects on gastrin and studies using insulin hypoglycemia as a vagal stimulant pancreatic polypeptide release which were similar to must be interpreted with caution because there is the 2.3-pAg/kg dose. -
Preprocholecystokinin Processingin the Normal Human Anterior Pituitary
Proc. Nati. Acad. Sci. USA Vol. 84, pp. 3019-3023, May 1987 Medical Sciences Preprocholecystokinin processing in the normal human anterior pituitary (cell differentiation/peptide hormone/radioimmunoassay) JENS F. REHFELD University Department of Clinical Chemistry, Rigshospitalet, DK-2100 Copenhagen, Denmark Communicated by Diter von Wettstein, January 2, 1987 (receivedfor review October 28, 1986) ABSTRACT The processing of preprocholecystokinin in (12). Two pituitary corticotrophic tumors from patients with human pituitary extracts was investigated using gel and ion- Nelson syndromes were obtained by transsphenoidal resec- exchange chromatography monitored by sequence-specific tion. The tumor specimens and the normal pituitary lobes radioimmunoassays before and after incubation with trypsin, were frozen in liquid nitrogen and stored at -80'C until carboxypeptidase B, and arylsulfatase. Whereas the neural extraction. The frozen tumors or lobes were minced (each lobe contained only the bioactive a-carboxyamidated cholecys- lobe separately), boiled for 20 min in redistilled water (pH tokinin (CCK) peptides (32 pmol/g), of which CCK-8 predom- 6.6, 10 ml/g of tissue), homogenized, and centrifuged. The inated, the anterior lobe contained substantial amounts ofthree pellet was extracted in an equal volume of 0.5 M CH3COOH large nonamidated procholecystokinin fragments (95 pmol/g; at 10°C and centrifuged; the supernatants were stored at Mrs, 9000, 7000, and 5000) and small amounts of a-amidated -20°C until analysis. The neutral and acid extracts diluted CCK (8.3 pmol/g). The latter occurred only in the following from 1:3 to 1:10,000 were assayed with sequence-specific large molecular forms: component I, CCK-58, and traces of CCK radioimmunoassays before and after treatment with CCK-33. -
Glucocorticoids Exacerbate Obesity and Insulin Resistance in Neuron-Specific Proopiomelanocortin-Deficient Mice
Amendment history: Corrigendum (March 2006) Glucocorticoids exacerbate obesity and insulin resistance in neuron-specific proopiomelanocortin-deficient mice James L. Smart, … , Virginie Tolle, Malcolm J. Low J Clin Invest. 2006;116(2):495-505. https://doi.org/10.1172/JCI25243. Research Article Endocrinology Null mutations of the proopiomelanocortin gene (Pomc–/–) cause obesity in humans and rodents, but the contributions of central versus pituitary POMC deficiency are not fully established. To elucidate these roles, we introduced a POMC transgene (Tg) that selectively restored peripheral melanocortin and corticosterone secretion in Pomc–/– mice. Rather than improving energy balance, the genetic replacement of pituitary POMC in Pomc–/–Tg+ mice aggravated their metabolic syndrome with increased caloric intake and feed efficiency, reduced oxygen consumption, increased subcutaneous, visceral, and hepatic fat, and severe insulin resistance. Pair-feeding of Pomc–/–Tg+ mice to the daily intake of lean controls normalized their rate of weight gain but did not abolish obesity, indicating that hyperphagia is a major but not sole determinant of the phenotype. Replacement of corticosterone in the drinking water of Pomc–/– mice recapitulated the hyperphagia, excess weight gain and fat accumulation, and hyperleptinemia characteristic of genetically rescued Pomc–/–Tg+ mice. These data demonstrate that CNS POMC peptides play a critical role in energy homeostasis that is not substituted by peripheral POMC. Restoration of pituitary POMC expression to create a de facto neuronal POMC deficiency exacerbated the development of obesity, largely via glucocorticoid modulation […] Find the latest version: https://jci.me/25243/pdf Research article Glucocorticoids exacerbate obesity and insulin resistance in neuron-specific proopiomelanocortin-deficient mice James L. -
Adipose Tissue As an Endocrine Organ
0021-972X/04/$15.00/0 The Journal of Clinical Endocrinology & Metabolism 89(6):2548–2556 Printed in U.S.A. Copyright © 2004 by The Endocrine Society doi: 10.1210/jc.2004-0395 Adipose Tissue as an Endocrine Organ ERIN E. KERSHAW AND JEFFREY S. FLIER Division of Endocrinology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215 Adipose tissue is a complex, essential, and highly active met- the renin-angiotensin system, and resistin. Adipose tissue is abolic and endocrine organ. Besides adipocytes, adipose tis- also a major site for metabolism of sex steroids and glucocor- Downloaded from https://academic.oup.com/jcem/article-abstract/89/6/2548/2870285 by guest on 09 April 2020 sue contains connective tissue matrix, nerve tissue, stromo- ticoids. The important endocrine function of adipose tissue is vascular cells, and immune cells. Together these components emphasized by the adverse metabolic consequences of both function as an integrated unit. Adipose tissue not only re- adipose tissue excess and deficiency. A better understanding sponds to afferent signals from traditional hormone systems of the endocrine function of adipose tissue will likely lead to and the central nervous system but also expresses and se- more rational therapy for these increasingly prevalent disor- cretes factors with important endocrine functions. These fac- ders. This review presents an overview of the endocrine func- tors include leptin, other cytokines, adiponectin, complement tions of adipose tissue. (J Clin Endocrinol Metab 89: 2548–2556, components, plasminogen activator inhibitor-1, proteins of 2004) HE TRADITIONAL VIEW of adipose tissue as a passive states (4). -
The Role of Corticotropin-Releasing Hormone at Peripheral Nociceptors: Implications for Pain Modulation
biomedicines Review The Role of Corticotropin-Releasing Hormone at Peripheral Nociceptors: Implications for Pain Modulation Haiyan Zheng 1, Ji Yeon Lim 1, Jae Young Seong 1 and Sun Wook Hwang 1,2,* 1 Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; [email protected] (H.Z.); [email protected] (J.Y.L.); [email protected] (J.Y.S.) 2 Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea * Correspondence: [email protected]; Tel.: +82-2-2286-1204; Fax: +82-2-925-5492 Received: 12 November 2020; Accepted: 15 December 2020; Published: 17 December 2020 Abstract: Peripheral nociceptors and their synaptic partners utilize neuropeptides for signal transmission. Such communication tunes the excitatory and inhibitory function of nociceptor-based circuits, eventually contributing to pain modulation. Corticotropin-releasing hormone (CRH) is the initiator hormone for the conventional hypothalamic-pituitary-adrenal axis, preparing our body for stress insults. Although knowledge of the expression and functional profiles of CRH and its receptors and the outcomes of their interactions has been actively accumulating for many brain regions, those for nociceptors are still under gradual investigation. Currently, based on the evidence of their expressions in nociceptors and their neighboring components, several hypotheses for possible pain modulations are emerging. Here we overview the historical attention to CRH and its receptors on the peripheral nociception and the recent increases in information regarding their roles in tuning pain signals. We also briefly contemplate the possibility that the stress-response paradigm can be locally intrapolated into intercellular communication that is driven by nociceptor neurons. -
Proopiomelanocortin, a Polypeptide Precursor with Multiple Functions
European Journal of Endocrinology (2003) 149 79–90 ISSN 0804-4643 INVITED REVIEW Proopiomelanocortin, a polypeptide precursor with multiple functions: from physiology to pathological conditions M L Raffin-Sanson1,3, Y de Keyzer1 and X Bertagna1,2 1Institut Cochin, De´partement d’Endocrinologie, Universite´ Rene´ Descartes-Paris V, France, 2Service des Maladies Endocriniennes et Me´taboliques, Hoˆpital Cochin, Paris, France and 3Me´decine Interne 2, Endocrinologie, Hoˆpital Ambroise Pare´, Boulogne/S, France (Correspondence should be addressed to X Bertagna; Email: [email protected]) Abstract Proopiomelanocortin (POMC) is the polypeptide precursor of ACTH. First discovered in anterior pitu- itary corticotroph cells, it has more recently been revealed to have many other physiological aspects. The fine molecular mechanisms of ACTH biosynthesis show that ACTH is but one piece of a puzzle which contains many other peptides. Present in various tissues, among which are pituitary, hypo- thalamus, central nervous system and skin, POMC undergoes extensive post-translational processing. This processing is tissue-specific and generates, depending on the case, various sets of peptides involved in completely diverse biological functions. POMC expressed in corticotroph cells of the pitu- itary is necessary for adrenal function. Recent developments have shown that POMC-expressing neur- ons in the brain play a major role in the control of pain and energy homeostasis. Local production of POMC-derived peptides in skin may influence melanogenesis. A still unknown function in the placenta is likely. POMC has become a paradigmatic polypeptide precursor model illustrating the variable roles of a single gene and its various products in different localities. -
Reciprocal Regulation of Antral Gastrin and Somatostatin Gene Expression by Omeprazole-Induced Achlorhydria
Reciprocal regulation of antral gastrin and somatostatin gene expression by omeprazole-induced achlorhydria. S J Brand, D Stone J Clin Invest. 1988;82(3):1059-1066. https://doi.org/10.1172/JCI113662. Research Article Gastric acid exerts a feedback inhibition on the secretion of gastrin from antral G cells. This study examines whether gastrin gene expression is also regulated by changes in gastric pH. Achlorhydria was induced in rats by the gastric H+/K+ ATPase inhibitor, omeprazole (100 mumol/kg). This resulted in fourfold increases in both serum gastrin (within 2 h) and gastrin mRNA levels (after 24 h). Antral somatostatin D cells probably act as chemoreceptors for gastric acid to mediate a paracrine inhibition on gastrin secretion from adjacent G cells. Omeprazole-induced achlorhydria reduced D-cell activity as shown by a threefold decrease in antral somatostatin mRNA levels that began after 24 h. Exogenous administration of the somatostatin analogue SMS 201-995 (10 micrograms/kg) prevented both the hypergastrinemia and the increase in gastrin mRNA levels caused by omeprazole-induced achlorhydria. Exogenous somatostatin, however, did not influence the decrease in antral somatostatin mRNA levels seen with achlorhydria. These data, therefore, support the hypothesis that antral D cells act as chemoreceptors for changes in gastric pH, and modulates somatostatin secretion and synthesis to mediate a paracrine inhibition on gastrin gene expression in adjacent G cells. Find the latest version: https://jci.me/113662/pdf Reciprocal Regulation of Antral Gastrin and Somatostatin Gene Expression by Omeprazole-induced Achlorhydria Stephen J. Brand and Deborah Stone Departments ofMedicine, Harvard Medical School and Massachusetts General Hospital, Gastrointestinal Unit, Boston, Massachusetts Abstract Substantial evidence supports the hypothesis that gastric acid inhibits gastrin secretion through somatostatin released Gastric acid exerts a feedback inhibition on the secretion of from antral D cells (9, 10). -
Maternal Smoking and Infantile Gastrointestinal Dysregulation: the Case of Colic
Maternal Smoking and Infantile Gastrointestinal Dysregulation: The Case of Colic Edmond D. Shenassa, ScD*‡, and Mary-Jean Brown, ScD, RN§ ABSTRACT. Background. Infants’ healthy growth intestinal motilin levels and (2) higher-than-average lev- and development are predicated, in part, on regular func- els of motilin are linked to elevated risks of IC. Although tioning of the gastrointestinal (GI) tract. In the first 6 these findings from disparate fields suggest a physio- months of life, infants typically double their birth logic mechanism linking maternal smoking with IC, the weights. During this period of intense growth, the GI entire chain of events has not been examined in a single tract needs to be highly active and to function optimally. cohort. A prospective study, begun in pregnancy and Identifying modifiable causes of GI tract dysregulation continuing through the first 4 months of life, could pro- is important for understanding the pathophysiologic pro- vide definitive evidence linking these disparate lines of cesses of such dysregulation, for identifying effective research. Key points for such a study are considered. and efficient interventions, and for developing early pre- Conclusions. New epidemiologic evidence suggests vention and health promotion strategies. One such mod- that exposure to cigarette smoke and its metabolites may ifiable cause seems to be maternal smoking, both during be linked to IC. Moreover, studies of the GI system and after pregnancy. provide corroborating evidence that suggests that (1) Purpose. This article brings together information that smoking is linked to increased plasma and intestinal strongly suggests that infants’ exposure to tobacco smoke motilin levels and (2) higher-than-average intestinal mo- is linked to elevated blood motilin levels, which in turn tilin levels are linked to elevated risks of IC. -
The Effect of Gastrin on Basal- and Glucose-Stimulated Insulin Secretionin
The Effect of Gastrin on Basal- and Glucose-Stimulated Insulin Secretion in Man JENS F. REHFEU and FLEMMING STADIL From the Department of Clinical Chemistry, Bispebjerg Hospital, and Department of Gastroenterology C, Rigshospitalet, Copenhagen, Denmark A B S T R A C T The effect of gastrin on basal- and glu- INTRODUCTION cose-stimulated insulin secretion was studied in 32 nor- Gastrointestinal hormones probably contribute signifi- mal, young subjects. The concentration of gastrin and in- cantly to the stimulation of insulin secretion during in- sulin in serum was measured radioimmunochemically. gestion of glucose or protein (1-4). It has been sug- Maximal physiologic limit for the concentration of gested that more than half the insulin response to oral gastrin in serum was of the order of 160 pmol per liter intake of glucose is caused by enteric hormones (5). At as observed during a protein-rich meal. Oral ingestion the present time there is a considerable debate as to of 50 g glucose produced a small gastrin response from which hormone or hormones mediate the insulin response. 28±3 to 39+5 pmol per liter (mean +SEM, P < 0.01). Concerning the action of gastrin on insulin secretion, Intravenous injection or prolonged infusion of gastrin stimulation (6-11), no effect (12-16), as well as inhibi- increased the concentration of insulin in peripheral ve- tion (17) have been reported. The conflicting results nous blood to a maximum within 2 min followed by a may in part be due to the use of pharmacological doses decline to basal levels after a further 10 min.