Pituitary tumours are common in dogs and being increasingly recognized cats. usually classified as adenomas should only be carcinomas when there is evidence of metastatic spread the tumour, which rare. Despite benign nature most pituitary tumours, they can still compress or invade neighbouring tissues. functional (hormonally active) non-functional silent). The aim this review was to provide an ...

We present a proof of concept study designed to support the clinical development of mass spectrometry imaging (MSI) for the detection of pituitary tumors during surgery. We analyzed by matrix-assisted laser desorption/ionization (MALDI) MSI six nonpathological (NP) human pituitary glands and 45 hormone secreting and nonsecreting (NS) human pituitary adenomas. We show that the distribution of pi...

Pituitary adenomas constitute 15-20% of intracranial neoplasms. Previously we reported that cyclin-dependent kinase 5 (CDK5) is upregulated in pituitary tumors associated with activating protein p35, and plays an essential role in pituitary adenomas progression. Here we explored the mechanisms of CDK5 signaling in prolactin pituitary adenomas. Our data indicate that p35 expression and CDK5 acti...

Pituitary adenomas can cause endocrine disorder and organ damage, with some aggressive ones leading to a high postoperative recurrence rate. The occurrence and development of these type of tumors is closely related with matrix metalloproteinases (MMPs) and endogenous specific tissue inhibitor of MMPs (TIMPs). In this study, the relationship between pituitary adenoma invasion and the changes in ...

Pituitary adenomas can invade surrounded tissue, but the mechanism remains elusive. Ether à go-go-1 (Eag1) potassium channel and epidermal growth factor receptors (ErbB1 and ErbB2) have been associated to invasive phenotypes or poor prognosis in cancer patients. However, cells arrange their cytoskeleton in order to acquire a successful migration pattern. We have studied ErbBs and Eag1 expressio...

BACKGROUND New biological markers are needed for diagnosis of atypical pituitary adenoma. The study aimed to evaluate cathepsins B and L and inhibitor stefin A in relation to their aggressive progression. PATIENTS AND METHODS We evaluated 19 adenomas and 10 normal hypophyses. Adenomas were divided according to their histological features and according to their functional activity, e.g. hormon...

The improved management of pituitary adenomas has led to an increasing number of pregnancies in patients harboring pituitary adenomas. Therefore, adequate management of pregnant women with pituitary adenomas is of growing importance. Because pregnancy produces several physiologic changes to the endocrine system, especially to the pituitary gland, endocrinologists must be knowledgeable and skill...

The anterior pituitary gland integrates the repertoire of hormonal signals controlling thyroid, adrenal, reproductive, and growth functions. The gland responds to complex central and peripheral signals by trophic hormone secretion and by undergoing reversible plastic changes in cell growth leading to hyperplasia, involution, or benign adenomas arising from functional pituitary cells. Discussed ...

The epigenetic changes in pituitary adenomas were identified by evaluating the methylation status of nine genes (RB1, p14ARF, p16INK4a, p73, TIMP-3, MGMT, DAPK, THBS1 and caspase-8) in a series of 35 tumours using methylationspecific PCR analysis plus sequencing. The series included non-functional adenomas (n=23), prolactinomas (n=6), prolactinoma plus thyroid-stimulating hormone adenoma (n=1),...

Pituitary adenomas comprise a heterogenous group of adenohypophyseal tumours with distinct clinicopathological features across both the clinically functioning and silent groups. Although, predicting a clinically aggressive course remains challenging, accurate subtyping of pituitary adenomas offers valuable prognostic information that together with other clinical and radiological information ser...