Evidence map›Paper›PMID 25870702›Full record

ArticleJournal of medicine and life2014

Colocalization methods in pituitary tumorigenesis aged-related in MEN1 KO and wild type mice.

C Stancu, M Coculescu

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Article in Journal of medicine and life, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

C StancuDepartment of Endocrinology, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
M CoculescuDepartment of Endocrinology, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
Carol Davila University of Medicine and Pharmacy · RO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundColocalization analysis of confocal fluorescence and electron microscopy (EM) are important tools to detect the expression of multiple anterior pituitary hormones within the same cell. Heterozygous (Men1+/-) mice developed pituitary tumors, mostly reported somatolactotrophinomas and ACTH secreting pituitary adenomas but also nonfunctioning tumors. The aim of the study was to run immunohistochemistry protocols to study colocalization of pituitary hormones in newborn mice in tumoral and non-tumoral tissue in MEN1-KO and wild type control mice.

methodsPituitary samples from nine Men1+/- mice, 29-34 days old male mice (n=8) and one year old (n=1) and control group, four new born (1,5 days old) wild type (mus musculus) mice were analyzed by immunofluorescence immunohistochemistry (GH, PRL, gonadotrophs) to find hormonal colocalization in pituitary cell. Moreover, pituitaries were embedded in LRGold for immunogold labeling technique (GH, PRL, gonadotrophs and alpha-SU) also.

resultsPituitary tumors, immunoreactive only for PRL were found in three MEN1 - KO mice. No sign of pituitary hyperplasia was found in MEN1-KO. MEN1-KO non-tumoral pituitary displayed similar immunoreactivity to wild type pituitary. Colocalization studies revealed individual cells PRL-FSH immunoreactive and GH-FSH immunoreactive in the non-tumoral tissue from MEN1-KO mice and in wild type pituitaries respectively but no colocalization in the tumoral tissue. In conclusion, colocalization is a feature of neonate mouse pituitary but not in adults. The MEN1-KO pituitary tumors were prolactinomas and unlike non-tumoral pituitary tissue of MEN1-KO, displayed no PRL-FSH colocalization.

Indexed as

AnimalsFollicle Stimulating HormoneGrowth HormoneImmunohistochemistryMaleMiceMice, KnockoutMicroscopy, ElectronPituitary NeoplasmsProlactinProto-Oncogene ProteinsFollicle Stimulating HormoneGrowth HormoneMen1 protein, mouseProlactinProto-Oncogene Proteinsconfocal microscopyelectron microscopyimmunohistochemistryMEN1pituitary

Identifiers

PMID25870702
PMCPMC4391406
OpenAlexW2418286020

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