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https://www.readbyqxmd.com/read/27913611/silent-somatotroph-tumour-revisited-from-a-study-of-80-patients-with-and-without-acromegaly-and-a-review-of-the-literature
#1
Laura Chinezu, Alexandre Vasiljevic, Jacqueline Trouillas, Marion Lapoirie, Emmanuel Jouanneau, Gérald Raverot
BACKGROUND: Silent somatotroph tumours are growth hormone (GH) immunoreactive (IR) pituitary tumours without clinical and biological signs of acromegaly. Their better characterisation is required to improve the diagnosis. MATERIALS AND METHODS: Twenty-one silent somatotroph tumours were compared to 59 somatotroph tumours with acromegaly. Tumours in each group were classified into GH and plurihormonal (GH/prolactin (PRL)/±thyroid-stimulating hormone (TSH)) and into densely granulated (DG) and sparsely granulated (SG) types...
February 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27911713/regulatory-mechanisms-of-phosphatase-of-regenerating-liver-prl-3
#2
REVIEW
Teresa Rubio, Maja Köhn
The phosphatase of regenerating liver (PRL)-3 is overexpressed in many human cancer types and tumor metastases when compared with healthy tissues. Different pathways and mechanisms have been suggested to modulate PRL-3 expression levels and activity, giving some valuable insights but still leaving an incomplete picture. Investigating these mechanisms could provide new targets for therapeutic drug development. Here, we present an updated overview and summarize recent findings concerning the different PRL-3 expression regulatory mechanisms and posttranslational modifications suggested to modulate the activity, localization, or stability of this phosphatase...
October 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27899452/structural-basis-of-the-oncogenic-interaction-of-phosphatase-prl-1-with-the-magnesium-transporter-cnnm2
#3
Paula Giménez-Mascarell, Iker Oyenarte, Serge Hardy, Tilman Breiderhoff, Marchel Stuiver, Elie Kostantin, Tammo Diercks, Angel L Pey, June Ereño-Orbea, María Luz Martinez-Chantar, Reham Khalaf-Nazzal, Félix Claverie-Martín, Dominik Müller, Michel L Tremblay, Luis Alfonso Martínez-Cruz
Phosphatases of regenerating liver (PRLs), the most oncogenic of all protein tyrosine phosphatases (PTPs), play a critical role in metastatic progression of cancers. Recent findings established a new paradigm by uncovering that their association with magnesium transporters of the Cyclin M (CNNM) family causes intracellular magnesium levels that promotes oncogenic transformation. On the other hand, it has recently been highlighted essential roles of the CNNM family in regulation of the circadian rhythm, and reproduction...
November 29, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27895762/primary-renal-lymphoma-a-case-report-and-literature-review
#4
Xiaodong Chen, Danfei Hu, Laifu Fang, Yichen Chen, Xiaohang Che, Jin Tao, Guobin Weng, Xiaolei Ye
Primary renal lymphoma (PRL) is a rare disease, with no more than 70 cases reported in the literature. The present study reports the case of a 70-year-old woman with PRL. The patient was asymptomatic, however, a mass on the right kidney was identified incidentally during routine physical examination. Computed tomography revealed a mass in the right kidney that was 3.6 cm in diameter. Subsequently, right nephrectomy was performed. The histological evaluation of the nephrectomy specimen showed diffuse large B-cell non-Hodgkin's lymphoma...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27893788/effects-of-high-fat-diet-on-stress-response-in-male-and-female-wildtype-and-prolactin-knockout-mice
#5
Manu Kalyani, Kathryn Hasselfeld, James M Janik, Phyllis Callahan, Haifei Shi
Prolactin (PRL) is well characterized for its roles in initiation and maintenance of lactation, and it also suppresses stress-induced responses. Feeding a high-fat diet (HFD) disrupts activity of the hypothalamic-pituitary-adrenal (HPA) axis. Whether PRL regulates HPA axis activation under HFD feeding is not clear. Male and female wildtype (WT) and PRL knockout (KO) mice were fed either a standard low-fat diet (LFD) or HFD for 12 weeks. Circulating corticosterone (CORT) levels were measured before, during, and after mice were subjected to an acute restraint stress or remained in their home cages as no stress controls...
2016: PloS One
https://www.readbyqxmd.com/read/27882103/identification-of-proteins-suppressing-the-functions-of-oncogenic-phosphatase-of-regenerating-liver-1-and-3
#6
Ju-Dong Lee, Haiyoung Jung, Sang-Hyun Min
The phosphatase of regenerating liver (PRL) family, including PRL-1, PRL-2, and PRL-3, comprises protein tyrosine phosphatases whose deregulation is associated with the tumorigenesis and metastasis of many types of cancer. However, the underlying mechanism is poorly understood. In this study, aiming to increase understanding of the molecular mechanisms underlying the functions of PRL-1 and PRL-3, a yeast two-hybrid system was employed to screen for their interacting proteins. Alignment with the NCBI BLAST database revealed 12 interactive proteins: Synaptic nuclear envelope protein 2, emerin, mannose 6-phosphate receptor-binding protein 1, low-density lipoprotein receptor-related protein 10, Rab acceptor 1, tumor protein D52-like 2, selectin P ligand (SELPLG), guanylate binding protein 1, transmembrane and ubiquitin-like domain-containing 2, NADH:ubiquinone oxidoreductase subunit B8, syndecan 4 and FK506-binding protein 8 (FKBP8)...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27856537/phosphocysteine-in-the-prl-cnnm-pathway-mediates-magnesium-homeostasis
#7
Irina Gulerez, Yosuke Funato, Howie Wu, Meng Yang, Guennadi Kozlov, Hiroaki Miki, Kalle Gehring
PRLs (phosphatases of regenerating liver) are frequently overexpressed in human cancers and are prognostic markers of poor survival. Despite their potential as therapeutic targets, their mechanism of action is not understood in part due to their weak enzymatic activity. Previous studies revealed that PRLs interact with CNNM ion transporters and prevent CNNM4-dependent Mg(2+) transport, which is important for energy metabolism and tumor progression. Here, we report that PRL-CNNM complex formation is regulated by the formation of phosphocysteine...
December 2016: EMBO Reports
https://www.readbyqxmd.com/read/27856243/biphasic-actions-of-seca-inhibitors-on-prl-sec-suppressors-possible-physiological-roles-of-seca-only-channels
#8
Ying-Hsin Hsieh, Hao Zhang, Jinshan Jin, Chaofeng Dai, Chun Jiang, Binghe Wang, Phang C Tai
SecA is an essential component in the bacterial Sec-dependent protein translocation process. We previously showed that in addition to the ubiquitous, high-affinity SecYEG-SecDF·YajC protein translocation channel, there is a low-affinity SecA-only channel that elicits ion channel activity and promotes protein translocation. The SecA-only channels are less efficient, and like Prl suppressors, lack signal peptide specificity; they function in the absence of signal peptides. The presence of SecYEG-SecDF·YajC alters the sensitivity of ATPase inhibitor Rose Bengal...
November 14, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27855229/late-presentation-of-acromegaly-in-medically-controlled-prolactinoma-patients
#9
Ekaterina Manuylova, Laura M Calvi, Catherine Hastings, G Edward Vates, Mahlon D Johnson, William T Cave, Ismat Shafiq
: Co-secretion of growth hormone (GH) and prolactin (PRL) from a single pituitary adenoma is common. In fact, up to 25% of patients with acromegaly may have PRL co-secretion. The prevalence of acromegaly among patients with a newly diagnosed prolactinoma is unknown. Given the possibility of mixed GH and PRL co-secretion, the current recommendation is to obtain an insulin-like growth factor-1 (IGF-1) in patients with prolactinoma at the initial diagnosis. Long-term follow-up of IGF-1 is not routinely done...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27848079/cabergoline-and-prolactinomas-lack-of-association-between-drd2-polymorphisms-and-response-to-treatment
#10
Cbf Bueno, E B Trarbach, M D Bronstein, A Glezer
BACKGROUND: About 80% of prolactinomas respond to dopamine agonists (DA) with hormonal normalization and tumor shrinkage. Mechanisms of DA resistance include reduction of dopamine receptor subtype 2 (DRD2) expression, short and long isoform ratio and post-receptor mechanisms. It was suggested that polymorphisms in the gene encoding dopamine receptor subtype 2 gene (DRD2) could be associated with variable effectiveness of cabergoline (CAB). OBJECTIVE: To assess the influence of DRD2 polymorphisms in responsiveness of CAB treatment in patients with prolactinoma...
November 15, 2016: Pituitary
https://www.readbyqxmd.com/read/27836773/distinct-roles-of-prolactin-epidermal-growth-factor-and-glucocorticoids-in-%C3%AE-casein-secretion-pathway-in-lactating-mammary-epithelial-cells
#11
Ken Kobayashi, Shoko Oyama, Chinatsu Kuki, Yusaku Tsugami, Kota Matsunaga, Takahiro Suzuki, Takanori Nishimura
Beta-casein is a secretory protein contained in milk. Mammary epithelial cells (MECs) synthesize and secrete β-casein during lactation. However, it remains unclear how the β-casein secretion pathway is developed after parturition. In this study, we focused on prolactin (PRL), epidermal growth factor (EGF), and glucocorticoids, which increase in blood plasma and milk around parturition. MECs cultured with PRL, EGF and dexamethasone (DEX: glucocorticoid analog) developed the β-casein secretion pathway. In the absence of PRL, MECs hardly expressed β-casein...
November 9, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27830003/effect-of-bisphenol-a-on-occurrence-and-progression-of-prolactinoma-and-its-underlying-mechanisms
#12
Lanxiang Hao, Jing Zhang, Yonghong Zhang, Haitao Hu, Weiwei Shao, Xiaochen Zhang, Chunmei Geng, Yanyan Wang, Ling Jiang
OBJECTIVE: To investigate the effects of Bisphenol A (BPA) on prolactin (PRL) release, pituitary cell proliferation, prolactinoma formation in estrogen-sensitive Fischer 344 (F344) rats. MATERIALS AND METHODS: Four-week-old female F344 rats were orally administered with different concentrations of BPA or intraperitoneal injection of estradiol benzoate (estradiolbenzoate, E2) for 12 weeks. Bodyweight, blood RPL level and pituitary weights were observed and recorded...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27829125/development-of-a-new-anti-prolactin-receptor-prlr-antibody-f56-which-can-serve-as-a-prlr-antagonist
#13
Huanzhong Cui, Yun Zhi Ma, Yanrong Wang, Meng Song, Hui Zhang
In this work, we developed a new prolactin receptor (PRLR) antagonist using the hybridoma technique. A series of monoclonal antibodies against prolactin receptor (PRLR) were prepared, from which we characterized and selected one anti-PRLR antibody, F56. Epitome mapping showed that F56 and prolactin (PRL) share a common binding epitope on PRLR, and therefore, F56 could compete with prolactin (PRL) for binding to PRLR. Subsequent experiments indicated that F56 could effectively neutralize PRLR-mediated intracellular signalling molecules, such as signal transducer and activator of transcription (STAT) and extracellular signal-regulated kinase-1 and kinase 2 (ERK1/2), either by endogenously expressed PRLR or in a cell model transfected with PRLR...
November 6, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27827961/positive-regulation-of-decidualization-by-l-type-amino-acid-transporter-1-lat1-in-pregnant-mice
#14
Xiaojie Wang, Dongmei Tan, Jing Ma, Hao Liang, Qian Zhang, Yi Tan, Jiang Wang, Wenping Luo
Amino acids have an important role in the pre and post implantation of placenta and embryo development. l-type amino-acid transporter 1 (lat1) is responsible for the transportation of large neutral amino acids and is mainly expressed in human fetal liver, placenta, brain, etc. This study is the first to investigate the expression of lat1 in the early pregnancy of mouse uteri and its role in the process of decidualization. Endometrial stromal cells of a mouse model were used to evaluate decidualization from Day 4-8 of pregnancy in vitro followed by lat1 knock down by small interfering RNA and by a competitive inhibitor of Leucine transport 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH)...
November 5, 2016: Nutrients
https://www.readbyqxmd.com/read/27824119/intake-of-7-8-dihydroxyflavone-during-juvenile-and-adolescent-stages-prevents-onset-of-psychosis-in-adult-offspring-after-maternal-immune-activation
#15
Mei Han, Ji-Chun Zhang, Wei Yao, Chun Yang, Tamaki Ishima, Qian Ren, Min Ma, Chao Dong, Xu-Feng Huang, Kenji Hashimoto
Prenatal infection and subsequent abnormal neurodevelopment of offspring is involved in the etiology of schizophrenia. Brain-derived neurotrophic factor (BDNF) and its high affinity receptor, tropomyosin receptor kinase B (TrkB) signaling plays a key role in the neurodevelopment. Pregnant mice exposed to polyriboinosinic-polyribocytidylic acid [poly(I:C)] causes schizophrenia-like behavioral abnormalities in their offspring at adulthood. Here we found that the juvenile offspring of poly(I:C)-treated mice showed cognitive deficits, as well as reduced BDNF-TrkB signaling in the prefrontal cortex (PFC)...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27815160/expression-and-regulation-of-prolactin-like-protein-messenger-rna-in-undifferentiated-chicken-granulosa-cells
#16
Shenqiang Hu, Raj Duggavathi, David Zadworny
Prolactin-like protein (PRL-L; LOC417800) is a homolog of PRL in non-mammalian vertebrates and can act as a functional ligand of PRL receptor (PRLR). Despite its widespread expression in extrapituitary tissues, mechanisms of regulation of PRL-L in the chicken ovary remain unknown. In this study, we first examined PRL-L expression in chicken ovarian developing follicles. PRL-L transcript levels were highest (P<0.05) in follicular walls of <2mm follicles and progressively declined during follicle maturation...
November 1, 2016: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/27809776/genome-wide-analysis-reveals-signatures-of-selection-for-important-traits-in-domestic-sheep-from-different-ecoregions
#17
Zhaohua Liu, Zhibin Ji, Guizhi Wang, Tianle Chao, Lei Hou, Jianmin Wang
BACKGROUND: Throughout a long period of adaptation and selection, sheep have thrived in a diverse range of ecological environments. Mongolian sheep is the common ancestor of the Chinese short fat-tailed sheep. Migration to different ecoregions leads to changes in selection pressures and results in microevolution. Mongolian sheep and its subspecies differ in a number of important traits, especially reproductive traits. Genome-wide intraspecific variation is required to dissect the genetic basis of these traits...
November 3, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27805870/prolactin-promotes-adipose-tissue-fitness-and-insulin-sensitivity-in-obese-males
#18
Xarubet Ruiz-Herrera, Ericka A de Los Ríos, Juan M Díaz, Ricardo M Lerma-Alvarado, Lucía Martínez de la Escalera, Fernando López-Barrera, María Lemini, Edith Arnold, Gonzalo Martínez de la Escalera, Carmen Clapp, Yazmín Macotela
Excessive accumulation of body fat triggers insulin resistance and features of the metabolic syndrome. Recently, evidence has accumulated that obesity, type 2 diabetes, and metabolic syndrome are associated with reduced levels of serum prolactin (PRL) in humans and rodents, raising the question of whether low PRL levels contribute to metabolic dysfunction. Here, we have addressed this question by investigating the role of PRL in insulin sensitivity and adipose tissue fitness in obese rodents and humans. In diet-induced obese rats, treatment with PRL delivered via osmotic mini-pumps, improved insulin sensitivity, prevented adipocyte hypertrophy, and reduced inflammatory cytokine expression in visceral fat...
November 2, 2016: Endocrinology
https://www.readbyqxmd.com/read/27793779/a-food-predictive-cue-attributed-with-incentive-salience-engages-subcortical-afferents-and-efferents-of-the-paraventricular-nucleus-of-the-thalamus
#19
Joshua L Haight, Zachary L Fuller, Kurt M Fraser, Shelly B Flagel
The paraventricular nucleus of the thalamus (PVT) has been implicated in behavioral responses to reward-associated cues. However, the precise role of the PVT in these behaviors has been difficult to ascertain since Pavlovian-conditioned cues can act as both predictive and incentive stimuli. The "sign-tracker/goal-tracker" rat model has allowed us to further elucidate the role of the PVT in cue-motivated behaviors, identifying this structure as a critical component of the neural circuitry underlying individual variation in the propensity to attribute incentive salience to reward cues...
October 25, 2016: Neuroscience
https://www.readbyqxmd.com/read/27790565/primary-renal-lymphoma-a-case-report-and-review-of-literature
#20
Shraddha Shetty, Avinash Chandra Singh, Vinod Babu
Primary Renal Lymphoma (PRL) is rare and its existence has been called into question due to the absence of lymphatic tissue within renal parenchyma. Non-specific abdominal pain with mass in the lumbar region and otherwise unexplained renal failure is the most common presentation. Almost all patients eventually develop extrarenal lymphomatous disease and few patients survive beyond one year. Surgical treatment is rarely feasible as primary modality of treatment since the tumour often encases major vessels and surrounding organs necessitating major resection...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
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