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https://www.readbyqxmd.com/read/28547758/ghrelin-receptors-mediate-ghrelin-induced-excitation-of-agrp-npy-but-not-pomc-neurons
#1
Shao-Rui Chen, Hong Chen, Jing-Jing Zhou, Geetali Pradhan, Yuxiang Sun, Hui-Lin Pan, De-Pei Li
Ghrelin increases food intake and body weight by stimulating orexigenic AgRP/NPY neurons and inhibiting anoexic POMC neurons in the hypothalamus. Growth hormone secretagogue receptor (Ghsr) mediates the effect of ghrelin on feeding behavior and energy homeostasis. However, the role of Ghsr in the ghrelin effect on these two populations of neurons is unclear. We hypothesized that Ghsr mediates the effect of ghrelin on AgRP and POMC neurons. In this study, we determined whether Ghsr similarly mediates the effects of ghrelin on AgRP/NPY and POMC neurons using cell type-specific Ghsr-knockout mice...
May 26, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28545087/the-second-terminations-of-the-suboccipital-muscles-an-assistant-pivot-for-the-to-be-named-ligament
#2
Xiao-Ying Yuan, Chan Li, Jia-Ying Sui, Qi-Qi Zhao, Xiao Zhang, Na-Na Mou, Zhao Huang-Fu, Okoye Chukwuemeka Samuel, Nan Zheng, Seung-Ho Han, Sheng-Bo Yu, Hong-Jin Sui
In the last two decades, many studies have focused on the muscles and dense connective tissues located in the suboccipital region. Our study investigated the existence of the second terminations originating from the suboccipital muscles, and the relationship between the variable types of the To Be Named Ligament (TBNL). Anatomical dissection was performed on 35 head-neck specimens. The existence of the second terminations of the suboccipital muscles was confirmed and various types of the TBNL were observed in this study...
2017: PloS One
https://www.readbyqxmd.com/read/28541082/correction-to-christodoulou-et-al-2016
#3
(no author information available yet)
Reports an error in "Relation of White-Matter Microstructure to Reading Ability and Disability in Beginning Readers" by Joanna A. Christodoulou, Jack Murtagh, Abigail Cyr, Tyler K. Perrachione, Patricia Chang, Kelly Halverson, Pamela Hook, Anastasia Yendiki, Satrajit Ghosh and John D. E. Gabrieli (Neuropsychology, Advanced Online Publication, Mar 7, 2016, np). In the original article, errors in the dataset owing to two incorrect scores have skewed results. Corrections to the Results section, Table 1, and Figure three are provided...
May 25, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28535930/ruptured-pancreaticoduodenal-artery-aneurysm-due-to-a-median-arcuate-ligament-treated-solely-by-revascularization-of-the-celiac-trunk
#4
Lucie Salomon du Mont, Fanny Lorandon, Julien Behr, Betty Leclerc, Emilie Ducroux, Simon Rinckenbach
Pancreaticoduodenal artery aneurysms (PDAA) are rare, but rupture can occur at any time regardless of the size. We describe here the case of 53-year-old woman who presented wit a ruptured PDAA associated with compression of the celiac trunk by the median arcuate ligament. We first performed revascularization of the celiac trunk without intervening on the PDAA, because of surgically hostile conditions. We observed complete regression of the PDAA, probably due to the dramatic decrease in inflow to the PDAA, thanks to the revascularization procedure...
May 20, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28531318/agrp-expressing-adrenal-chromaffin-cells-are-involved-in-the-sympathetic-response-to-fasting
#5
Rajesh Gupta, Yunbing Ma, Manqi Wang, Matthew D Whim
Fasting evokes a homeostatic response that maintains circulating levels of energy-rich metabolites and increases the drive to eat. Centrally this reflex activates a small population of hypothalamic neurons that are characterized by the expression of AgRP, a neuropeptide with an extremely restricted distribution. Apart from the hypothalamus the only other site with significant expression is the adrenal gland but there is disagreement about which cells synthesize AgRP. Using immunohistochemistry, flow cytometry and RT-PCR we show AgRP is present in the mouse adrenal medulla and is expressed by neuroendocrine chromaffin cells that also synthesize the catecholamines and neuropeptide Y...
May 22, 2017: Endocrinology
https://www.readbyqxmd.com/read/28530218/visualization-of-penile-suspensory-ligamentous-system-based-on-visible-human-data-sets
#6
Xianzhuo Chen, Yi Wu, Ling Tao, Yan Yan, Jun Pang, Shaoxiang Zhang, Shirong Li
BACKGROUND The aim of this study was to use a three-dimensional (3D) visualization technology to illustrate and describe the anatomical features of the penile suspensory ligamentous system based on the Visible Human data sets and to explore the suspensory mechanism of the penis for the further improvement of the penis-lengthening surgery. MATERIAL AND METHODS Cross-sectional images retrieved from the first Chinese Visible Human (CVH-1), third Chinese Visible Human (CVH-3), and Visible Human Male (VHM) data sets were used to segment the suspensory ligamentous system and its adjacent structures...
May 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28527681/decreased-food-anticipatory-activity-of-obese-mice-relates-to-hypothalamic-c-fos-expression
#7
C Luna-Illades, T Morales, M Miranda-Anaya
During daily Food Restriction (FR), obese Neotomodon alstoni mice present decreased Food Anticipatory Activity (FAA) compared to lean mice. Here, we investigated whether FOS expression in hypothalamic nuclei involved in food synchronization and anticipation parallels decreased FAA during daily FR of obese N. alstoni. Locomotor activity of lean and obese mice in ad libitum feeding conditions was monitored for at least two weeks. Then, a gradual restriction of food access was followed to establish a 5h period of daily food access...
May 17, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28522409/neonatal-exposure-to-17%C3%AE-ethynyl-estradiol-ee-disrupts-follicle-development-and-reproductive-hormone-profiles-in-female-rats
#8
Haolin Zhang, Kazuyoshi Taya, Kentaro Nagaoka, Midori Yoshida, Gen Watanabe
Toxic effects induced by exposure to endocrine-disrupting chemicals during fetal and neonatal periods can be irreversible and exert effects throughout an animal's entire life. Our previous study showed that neonatal exposure to 17α-ethynyl estradiol (EE) induced irregular estrous cycle in adults. To uncover the reason for the delayed effect after neonatal exposure to EE, reproductive parameters including ovarian weight, ovarian steroidogenesis, and hormonal profiles were investigated in developing female rats...
May 15, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28506484/a-surgical-approach-to-the-anatomo-functional-structure-of-language
#9
REVIEW
E Mandonnet
INTRODUCTION: Language is the most widely mapped cognitive function during brain surgery. Intraoperative language functional mapping using direct electrical stimulation under awake conditions is currently the gold standard technique for establishing the causal link between an area and a deficit that would be caused by its resection. It is also a powerful tool to investigate the anatomical correlates of current neuropsychological models of language. MATERIAL AND METHODS: The aim of this article is to reexamine the anatomo-functional structure of language that could be inferred from data obtained in direct electrical stimulation studies during awake surgery...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28506483/cortical-and-subcortical-functional-neuroanatomy-for-low-grade-glioma-surgery
#10
REVIEW
L Chenin, M Lefranc, S Velut, P Foulon, E Havet, J Peltier
Knowledge of the encephalon anatomy is crucial for neurosurgical practice, especially the main cortical functional structures and their connections. General organisation of the encephalon is presented with frontal, parietal, occipital, temporal, limbic and insular lobes and their Brodmann correspondence. Secondly, subcortical anatomy will be presented with main white matter fasciculi in three separated categories: association, commissural and projection fibers. Main association fibers are inferior occipitofrontal fasciculus, superior longitudinal fasciculus, arcuate fasciculus, inferior longitudinal fasciculus, uncinate fasciculus, and cingulum...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28501904/relationship-between-perisylvian-essential-language-sites-and-arcuate-fasciculus-in-the-left-hemisphere-of-healthy-adults
#11
Yu Lin, Kai Zhang, Shuai Li, Song Li, Jingna Jin, Fang Jin, Wen Qin, Long Hai, Meng Zhu, Chunshui Yu, Zhipeng Liu, Tao Yin, Xuejun Yang
Essential language sites and the arcuate fasciculus (AF) have been extensively researched. However, the relationship between them remains insufficiently studied, especially in healthy people. Navigated transcranial magnetic stimulation (nTMS) is increasingly used in language mapping. While enjoying the advantage of non-invasiveness, it is also capable of inducing a virtual lesion in the brain. Thus, it offers the possibility of using the virtual-lesion method to study the healthy brain. This study combined nTMS and diffusion tensor imaging (DTI) tractography to investigate the relationship between essential language sites and the AF in 30 healthy right-handed volunteers...
May 13, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28493483/preoperative-imaging-and-prediction-of-oesophageal-conduit-necrosis-after-oesophagectomy-for-cancer
#12
P Lainas, D Fuks, S Gaujoux, Z Machroub, A Fregeville, T Perniceni, F Mal, B Dousset, B Gayet
BACKGROUND: Oesophageal conduit necrosis following oesophagectomy is a rare but life-threatening complication. The present study aimed to assess the impact of coeliac axis stenosis on outcomes after oesophagectomy for cancer. METHODS: The study included consecutive patients who had an Ivor Lewis procedure with curative intent for middle- and lower-third oesophageal cancer at two tertiary referral centres. All patients underwent preoperative multidetector CT with arterial phase to detect coeliac axis stenosis...
May 11, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28489695/classification-of-haller-vessel-arrangements-in-acute-and-chronic-central-serous-chorioretinopathy-imaged-with-en-face-optical-coherence-tomography
#13
Maria C Savastano, Kunal K Dansingani, Marco Rispoli, Gianni Virgili, Alfonso Savastano, K Bailey Freund, Bruno Lumbroso
PURPOSE: To compare the prevailing patterns of Haller vessel arrangements at the posterior pole between healthy eyes and those with central serous chorioretinopathy (CSC) using en face optical coherence tomography. METHODS: Eyes of normal subjects and patients with acute or chronic CSC underwent optical coherence tomography imaging (RTVue 100; Optovue Inc, Fremont, CA). En face sections at the level of the Haller layer were classified by two masked graders into five mutually exclusive morphologic categories (temporal herringbone, branched from below, laterally diagonal, double arcuate, and reticular)...
May 9, 2017: Retina
https://www.readbyqxmd.com/read/28486037/role-of-arcuate-nucleus-in-the-regulation-of-feeding-behavior-in-the-process-of-altitude-acclimatization-in-rats
#14
Xiang-Wen Liu, Jie Yin, Qi-Sheng Ma, Chu-Chu Qi, Ji-Ying Mu, Lang Zhang, Li-Ping Gao, Yu-Hong Jing
Liu, Xiang-Wen, Jie Yin, Qi-Sheng Ma, Chu-Chu Qi, Ji-Ying Mu, Lang Zhang, Li-Ping Gao, and Yu-Hong Jing. Role of arcuate nucleus in the regulation of feeding behavior in the process of altitude acclimatization in rats. High Alt Med Biol. 00:000-000, 2017.-Highly efficient energy utilization and metabolic homeostasis maintenance rely on neuromodulation. Altitude exposure is known to stimulate neuroendocrine systems to respond to acute hypoxia and adaptive acclimatization. However, limited data on how the adaptive regulation of the arcuate nucleus performs in the process of altitude acclimatization are available...
May 9, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28479374/cafeteria-diet-differentially-alters-the-expression-of-feeding-related-genes-through-dna-methylation-mechanisms-in-individual-hypothalamic-nuclei
#15
Gisela Paola Lazzarino, María Florencia Andreoli, María Florencia Rossetti, Cora Stoker, María Virgina Tschopp, Enrique Hugo Luque, Jorge Guillermo Ramos
We evaluated the effect of cafeteria diet (CAF) on the mRNA levels and DNA methylation state of feeding-related neuropeptides, and neurosteroidogenic enzymes in discrete hypothalamic nuclei. Besides, the expression of steroid hormone receptors was analyzed. Female rats fed with CAF from weaning increased their energy intake, body weight, and fat depots, but did not develop metabolic syndrome. The increase in energy intake was related to an orexigenic signal of paraventricular (PVN) and ventromedial (VMN) nuclei, given principally by upregulation of AgRP and NPY...
May 4, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28477438/temporal-and-regional-onset-of-leptin-resistance-in-diet-induced-obese-mice
#16
Mohammed Z Rizwan, Sven Mehlitz, David R Grattan, Alexander Tups
In common forms of obesity, leptin fails to convey its regulatory effect. This so called "leptin resistance", is not well understood, and solving this puzzle is a key to understanding how obesity develops. Here, we investigated the temporal and regional onset of leptin resistance in response to a diet enriched with long-chain saturated fatty acids (HFD) in mice. Mice were exposed to either low-fat diet (LFD) or HFD for 4hr, 24hr, 10d and 28d. Mice in each group received an i.p injection of either PBS or leptin and the number of phosphorylated signal transducer and activator of transcription-3 (pSTAT3) immunoreactive (ir) cells in the ARC, VMH and DMH were analysed 30- or 120 min after treatment...
May 6, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28475285/involvement-of-neurone-glia-neurone-neurone-communications-via-gap-junctions-in-synchronised-activity-of-kndy-neurones
#17
K Ikegami, S Minabe, N Ieda, T Goto, A Sugimoto, S Nakamura, N Inoue, S Oishi, A D Maturana, M Sanbo, M Hirabayashi, K-I Maeda, H Tsukamura, Y Uenoyama
Pulsatile secretion of the gonadotropin-releasing hormone (GnRH)/luteinizing hormone is indispensable for puberty onset and reproductive activities at adulthood in mammalian species. A cohort of neurones expressing three neuropeptides, kisspeptin, encoded by Kiss1 gene, neurokinin B (NKB) and dynorphin A, localised in the hypothalamic arcuate nucleus (ARC), so-called KNDy neurones, are a putative intrinsic source of the GnRH pulse generator. Synchronous activity among KNDy neurones is thought to be required for pulsatile GnRH secretion...
May 5, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28473259/the-central-effects-of-alpha-melanocyte-stimulating-hormone-%C3%AE-msh-in-chicks-involve-changes-in-gene-expression-of-neuropeptide-y-and-other-factors-in-distinct-hypothalamic-nuclei
#18
Meghan S Delp, Mark A Cline, Elizabeth R Gilbert
Alpha-melanocyte stimulating hormone (α-MSH) is a satiety-inducing factor in birds and mammals although central mechanisms mediating its effects on appetite in birds are poorly understood. Thus, the objective of the present study was to determine effects of centrally-injected α-MSH on c-Fos and gene expression in chick appetite-associated hypothalamic nuclei. At 4days post-hatch, 3h-fasted chicks were intracerebroventricularly (ICV) injected with 0 (vehicle) or 0.12nmol α-MSH and 1h later, hypothalamus samples were collected for measuring c-Fos immunoreactivity and mRNA abundance of appetite-associated factors in hypothalamic nuclei...
May 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28473083/acr-appropriateness-criteria-%C3%A2-radiologic-management-of-mesenteric-ischemia
#19
Nicholas Fidelman, Ali F AbuRahma, Brooks D Cash, Baljendra S Kapoor, M-Grace Knuttinen, Jeet Minocha, Paul J Rochon, Colette M Shaw, Charles E Ray, Jonathan M Lorenz
Mesenteric vascular insufficiency is a serious medical condition that may lead to bowel infarction, morbidity, and mortality that may approach 50%. Recommended therapy for acute mesenteric ischemia includes aspiration embolectomy, transcatheter thrombolysis, and angioplasty with or without stenting for the treatment of underlying arterial stenosis. Nonocclusive mesenteric ischemia may respond to transarterial infusion of vasodilators such as nitroglycerin, papaverine, glucagon, and prostaglandin E1. Recommended therapy for chronic mesenteric ischemia includes angioplasty with or without stent placement and, if an endovascular approach is not possible, surgical bypass or endarterectomy...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28470961/language-ability-in-preterm-children-is-associated-with-arcuate-fasciculi-microstructure-at-term
#20
Piergiorgio Salvan, J Donald Tournier, Dafnis Batalle, Shona Falconer, Andrew Chew, Nigel Kennea, Paul Aljabar, Ghislaine Dehaene-Lambertz, Tomoki Arichi, A David Edwards, Serena J Counsell
In the mature human brain, the arcuate fasciculus mediates verbal working memory, word learning, and sublexical speech repetition. However, its contribution to early language acquisition remains unclear. In this work, we aimed to evaluate the role of the direct segments of the arcuate fasciculi in the early acquisition of linguistic function. We imaged a cohort of 43 preterm born infants (median age at birth of 30 gestational weeks; median age at scan of 42 postmenstrual weeks) using high b value high-angular resolution diffusion-weighted neuroimaging and assessed their linguistic performance at 2 years of age...
May 4, 2017: Human Brain Mapping
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