Expression and distribution of prolactin receptor in normal, fibrotic, and cirrhotic human liver.

Liver cirrhosis is often associated with elevated levels of prolactin (PRL). This is commonly attributed to impaired hepatic metabolism of estrogens. However, there is evidence suggesting that PRL may be an important factor in hepatic tissue regeneration. To investigate the role of PRL in the pathogenesis of liver cirrhosis, we used RT-PCR and immunhistochemical staining to analyze changes in the expression and the histological distribution of the prolactin receptor (PRLR) in normal, fibrotic and cirrhotic hepatic tissue. Liver tissue was obtained from 29 surgically explanted human livers. The histological examination demonstrated normal liver tissue (n=9) as well as different grades of fibrosis (n=10) and cirrhosis (n=10). In liver cirrhosis and fibrosis, PRLR-mRNA was expressed at a higher level compared to normal liver specimens. Immunohistochemical staining of normal liver tissue demonstrated homogeneous distribution of the PRLR in the hepatocytes and in the epithelial cells of the bile ducts. This pattern of distribution was lost in fibrosis, where an accumulation of the PRLR was observed in the damaged hepatocytes. As no PRL-mRNA was detectable in normal, fibrotic or cirrhotic tissue, PRL does not act through autocrine or paracrine mechanisms. These data confirm previous results, which we obtained using an animal model for experimental liver cirrhosis in rats suggesting a metabolic function of PRL in normal liver and a regenerative function in fibrotic and cirrhotic liver. In conclusion, PRL might be involved in the pathogenesis of liver cirrhosis.

Insulin secretion defects in liver cirrhosis can be reversed by glucagon-like peptide-1.

Liver cirrhosis is often accompanied by a disturbed carbohydrate metabolism similar to type 2 diabetes. To investigate the severity of the defect in insulin secretion in this form of diabetes, we measured insulin release from isolated pancreatic islets of rats with CCl(4)-phenobarbital-induced liver cirrhosis. Cirrhosis was confirmed by clinical signs, elevated liver enzymes and histology. Fasting venous plasma glucose concentrations were equal in rats with liver cirrhosis and in controls. Plasma insulin and glucagon concentrations were significantly greater (P<0.01) in cirrhotic rats than in control animals. Glucose (16.7 mM)-induced stimulation of insulin release from pancreatic islets revealed a twofold increase in control and cirrhotic rats. Basal and stimulated insulin secretion, however, were significantly lower in cirrhotic animals. The incretin hormone, glucagon-like peptide-1 (GLP-1), has therapeutic potential for the treatment of type 2 diabetes. Therefore, islets from control and cirrhotic animals were incubated with GLP-1 in concentrations from 10(-)(11) to 10(-)(6) M. GLP-1 stimulated insulin release in a concentration-dependent manner. In islets from cirrhotic rats, basal and stimulated insulin secretion was blunted compared with controls. These data show that the hyperinsulinemia observed in liver cirrhosis is not due to an increase of insulin secretion from islets, but could be explained by decreased hepatic clearance of insulin. GLP-1 may ameliorate diabetes in patients with liver cirrhosis.

The molecular basis of persistent hyperinsulinemic hypoglycemia of infancy and its pathologic substrates.

Recent advances in molecular genetics have established a molecular basis for persistent hyperinsulinemic hypoglycemia of infancy (PHHI) and resulted in the identification of a number of well-defined genetic defects. On the basis of the available information on the molecular changes so far described, an attempt has been made to classify PHHI patients according to their genotype and phenotype, with reference to molecular genetics, pancreatic pathology and clinical appearance. This classification has resulted in the differentiation of three groups of PHHI patients, two with diffuse beta cell hyperfunction and one with focal beta cell hyperfunction.

Duct changes and K-ras mutations in the disease-free pancreas: analysis of type, age relation and spatial distribution.

Recent molecular studies have suggested that hyperplastic duct lesions of the pancreas are potential precursors of pancreatic ductal carcinoma. This study examines the type, distribution, age-related incidence and K-ras codon 12 mutation rate of duct lesions in the normal pancreas. Postmortem pancreases from 140 patients were screened for the presence of mucinous cell hypertrophy (MHT), ductal papillary hyperplasia (DPH), adenomatoid ductal hyperplasia (ADH), and squamous metaplasia (SQM). Microdissected cell samples were analyzed for K-ras codon 12 mutations by polymerase chain reaction amplification of exon 1 of the K-ras gene, combined with constant denaturing gel electrophoresis, and analyzed by sequencing. Of the 140 specimens 114 showed duct lesions. The lesions were evenly distributed throughout the pancreas. They were more common beyond the age of 40. MHT was present in 68%, DPH in 36%, ADH in 40%, and SQM in 36% of the cases. K-ras mutations were found in 19 samples from 15 out of 79 pancreases (18%), including all types of duct lesions and a variant of ADH with dense stroma. 67% of the K-ras-positive specimens showed the transition GGT to GAT (8) or GTT (5). Hyperplastic/metaplastic duct changes of the pancreas increase with age, but their distribution pattern in the pancreas differs from that of ductal carcinomas.

[Squamous cell carcinoma in neovagina at Mayer-Rokitansky-Küster-Hauser-syndrome]. / Plattenepithelkarzinom der Neovagina nach Mayer-Rokitansky-Küster-Hauser-Syndrom.

UNLABELLED: Carcinoma of the vagina is a rare entity of cancer, also a primary carcinoma of the neovagina in patients with vaginal agenesia is of rare occurrence. CASE REPORT: We report on a 48-year-old female patient with a squamous cell carcinoma in neovagina after Mayer-Rokitansky-Kuester-Hauser-syndrome. Neovagina was constructed by method of Vecchietti 28 years before. Operative treatment consisted of anterior exenteration with construction of a modified Mainz-1-pouch. There were no complications intra- or postoperative. Microscopic findings showed a G2-differentiated invasive squamous cell carcinoma of the neovagina at stage FIGO III with an infiltration of urethra and the bladder neck. The tumor could be resected completely, no infestation of lymph nodes was observed. In the further process the aftercare is planned. In a systematic literature review 19 female patients with a primary carcinoma of neovagina after agenesia of vagina could be identified. CONCLUSIONS: Female patients with a neovagina require a regular gynaecologic examination in order not to survey a malignant transformation although a malignoma in neovagina is rare. A possible therapy option is the radical operation, there are no data of long-term prognosis at present.

Hyperinsulinaemic hypoglycaemia--leading symptom in a patient with congenital disorder of glycosylation Ia (phosphomannomutase deficiency).

A male infant is described who presented with persistent hyperinsulinaemic hypoglycaemia, responding to diazoxide treatment. However, this therapy was discontinued because of seizures as a consequence of disturbed water and electrolyte balance. Glucose homeostasis could only be maintained by subtotal pancreatectomy, which was performed at 3 8/12 years of age. He developed a severe thrombosis, whereon a congenital disorder of glycosylation (CDG) was suspected. An abnormal transferrin isoelectric focusing pattern was found and the diagnosis of CDG Ia was confirmed by enzyme and molecular genetic analysis. This is the first patient with phosphomannomutase deficiency (McKusick 601785) described presenting with severe hyperinsulinaemic hypoglycaemia.

[Cushing syndrome with life-threatening infectious complications]. / Cushing-Syndrom mit lebensbedrohlichen infektiologischen Komplikationen.

HISTORY AND ADMISSION FINDINGS: During treatment of phlegmon of the face, which involved the cornea, a 54-year-old man was transferred to the medical ward because of dyspnoea of rapid onset. He was known to have arterial hypertension with heart failure and diabetes mellitus, and to have sustained a fracture of the femur after minimal trauma. He had central cyanosis, ankle oedema, cushingoid appearance and ecchymoses. Loud rales ware heard over both lungs. Body temperature was 38.9 degrees C. INVESTIGATIONS: Laboratory tests indicated acute inflammation and he had signs of global respiratory failure. X-ray of the thorax showed cardiomegaly and an infiltrate in the right lung. The ECG indicated an old myocardial infarct and left heart strain. TREATMENT AND COURSE: Mechanical ventilation with intubation became necessary because of deteriorating respiratory function. Broad-spectrum antibiotics and antibiotics against suspected fungal pneumonia were administered; he was extubated after 28 days. Cortisol excretion of more than 3300 micrograms/24 h and failure of cortisol suppression after 1 mg dexamethasone were diagnostic of hypercortisolism. Other endocrine tests revealed an adrenal lesion, shown by computed tomography to be an adrenal tumour, 3 cm in diameter. It was excised and histologically proved to be an adenoma. INTERPRETATION: Nowadays infectious complications due to cortisol-associated immunosuppression are rare in Cushing disease, because of its early recognition and treatment. But hypercortisolism should be considered in patients with severe and prolonged infections.

Short rib-polydactyly syndrome type III: comparison of ultrasound, radiology, and pathology findings.

Short rib-polydactyly syndrome (SRPS; types I-IV) is an autosomal recessive, lethal skeletal dysplasia characterized by short-limb dysplasia, narrow thorax, and polydactyly. This syndrome is invariable and can be detected by 2-trimester ultrasound. The underlying gene has not been discovered yet. We report a case of SRPS subtype III Verma-Naumoff-Le Marec that was sonographically detected at 20 weeks' gestation and compare prenatal ultrasound with postmortem findings from pathology and radiology. Since the risk of recurrence is 25%, early ultrasound for consecutive pregnancies was advised and performed at 11+6 weeks' gestation in the following pregnancy without any findings. Ultrasound diagnosis in this rare case of SRPS is a valuable tool for identification and early management, since there are no specific biochemical or histopathological markers for this syndrome. Radiological and pathological findings confirmed SRPS type III and assisted in the differential diagnosis of the subtype.