keyword
MENU ▼
Read by QxMD icon Read
search

Pineal Gland

keyword
https://www.readbyqxmd.com/read/28803211/melatonin-protects-chondrocytes-from-impairment-induced-by-glucocorticoids-via-nad-dependent-sirt1
#1
Wei Yang, Xiaomin Kang, Na Qin, Feng Li, Xinxin Jin, Zhengmin Ma, Zhuang Qian, Shufang Wu
Intra-articular injection of glucocorticoids is used to relieve pain and inflammation in osteoarthritis patients, which is occasionally accompanied with the serious side effects of glucocorticoids in collagen-producing tissue. Melatonin is the major hormone released from the pineal gland and its beneficial effects on cartilage has been suggested. In the present study, we investigated the protective role of melatonin on matrix degeneration in chondrocytes induced by dexamethasone (Dex). The chondrocytes isolated from mice knee joint were treated with Dex, melatonin, EX527 and siRNA targeted for SIRT6, respectively...
August 9, 2017: Steroids
https://www.readbyqxmd.com/read/28802861/contrasting-effects-of-vortioxetine-and-paroxetine-on-pineal-gland-biochemistry-in-a-tryptophan-depletion-model-of-depression-in-female-rats
#2
M Franklin, N Hlavacova, Y Li, I Bermudez, A Csanova, C Sanchez, D Jezova
We studied the effects of the multi-modal antidepressant, vortioxetine and the SSRI, paroxetine on pineal melatonin and monoamine synthesis in a sub-chronic tryptophan (TRP) depletion model of depression based on a low TRP diet. Female Sprague-Dawley rats were randomised to groups a) control, b) low TRP diet, c) low TRP diet+paroxetine and d) low TRP diet+vortioxetine. Vortioxetine was administered via the diet (0.76mg/kg of food weight) and paroxetine via drinking water (10mg/kg/day) for 14days. Both drugs resulted in SERT occupancies >90%...
August 10, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28800009/pathologic-prognostic-factors-of-pineal-parenchymal-tumor-of-intermediate-differentiation
#3
Debajyoti Chatterjee, Khushboo Lath, Navneet Singla, Narendra Kumar, Bishan D Radotra
INTRODUCTION: Pineal parenchymal tumor of intermediate differentiation (PPTID) is an uncommon tumor of the pineal gland. Although this behaves as a grade II/III tumor, the exact clinical behavior is not well known. There is no well-established pathologic factor that can predict the behavior of PPTID. AIM AND OBJECTIVE: The aim of this study was to determine the pathologic prognostic factors in PPTID. MATERIALS AND METHODS: All PPTID cases diagnosed between 2006 and 2016 were analyzed retrospectively...
August 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28782536/immunolesion-of-melanopsin-neurons-causes-gonadal-regression-in-pekin-drakes-anas-platyrhynchos-domesticus
#4
H Potter, E Alenciks, K Frazier, A Porter, G S Fraley
Several light sensitive receptors have been described in the avian brain that are thought to regulate the reproductive axis independently from the eyes and pineal gland.Recently, our lab has described the presence of three of these photoneuroendocrine systems in the Pekin duck: opsin, opsin 5, & melanopsin. We set out to test the hypothesis that melanopsin receptive neurons are necessary to maintain seasonal reproductive status along with growth and development in the Pekin drake. To accomplish these goals we first investigated 50-week-old Pekin drakes that were housed in the aviary at Hope College under long day length (18 hrs lights on) conditions in floor pens...
August 4, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28770437/comparing-the-effects-of-melatonin-with-caloric-restriction-in-the-hippocampus-of-aging-mice-involvement-of-sirtuin1-and-the-foxos-pathway
#5
Anorut Jenwitheesuk, Seongjoon Park, Prapimpun Wongchitrat, Jiraporn Tocharus, Sujira Mukda, Isao Shimokawa, Piyarat Govitrapong
It has been suggested that age-related neurodegeneration might be associated with neuropeptide Y (NPY); sirtuin1 (SIRT1) and forkhead box transcription factors O subfamily (FOXOs) pathways. Melatonin, a hormone mainly secreted by the pineal gland, is another anti-aging agent associated with the SIRT1-FOXOs pathway. This study aimed to compare the effects of melatonin (Mel) and caloric restriction (CR) on the expression of Sirt1, FoxO1, FoxO3a and FOXOs target genes in the aging mouse hippocampus. Neuropeptide Y-knockout (NpyKO) and wild-type (WT) male mice aged 19 months were previously treated either with food ad libitum or CR for 16 months...
August 2, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28764741/the-role-of-melatonin-in-the-onset-and-progression-of-type-3-diabetes
#6
REVIEW
Juhyun Song, Daniel J Whitcomb, Byeong C Kim
Alzheimer's disease (AD) is defined by the excessive accumulation of toxic peptides, such as beta amyloid (Aβ) plaques and intracellular neurofibrillary tangles (NFT). The risk factors associated with AD include genetic mutations, aging, insulin resistance, and oxidative stress. To date, several studies that have demonstrated an association between AD and diabetes have revealed that the common risk factors include insulin resistance, sleep disturbances, blood brain barrier (BBB) disruption, and altered glucose homeostasis...
August 1, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28751425/melatonin-inhibits-hypothalamic-gonandotropin-releasing-hormone-release-and-reduces-biliary-hyperplasia-and-fibrosis-in-cholestatic-rats
#7
Matthew McMillin, Sharon DeMorrow, Shannon Glaser, Julie Venter, Konstantina Kyritsi, Tianhao Zhou, Stephanie Grant, Thao Giang, John F Greene, Nan Wu, Brandi Jefferson, Fanyin Meng, Gianfranco Alpini
Melatonin is a hormone produced by the pineal gland with increased circulating levels shown to inhibit biliary hyperplasia and fibrosis during cholestasis. Melatonin also has the capability to suppress the release of hypothalamic gonadotropin releasing hormone (GnRH), a hormone that promotes cholangiocyte proliferation when serum levels are elevated. However, the interplay and contribution of neural melatonin and GnRH to cholangiocyte proliferation and fibrosis in bile duct-ligated (BDL) rats has not been investigated...
July 27, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28747250/normal-neuroanatomical-variants-that-may-be-misinterpreted-as-disease-entities
#8
REVIEW
S Ramji, P Touska, P Rich, A D MacKinnon
Variations of normal development and benign incidental anomalies are frequently observed on diagnostic neuroimaging. It is important these are recognised for what they are, as misinterpretation may result in unnecessary further investigation, follow-up imaging and anxiety. In this article, we review benign intracranial anomalies commonly referred to our unit for specialist neuroradiology advice or multidisciplinary discussion, concerning cysts of the pineal gland and pituitary fossa, vascular anomalies, and perivascular spaces...
July 23, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28745939/reduced-pineal-volume-in-alzheimer-disease-a-retrospective-cross-sectional-mr-imaging-study
#9
Teruyuki Matsuoka, Ayu Imai, Hiroshi Fujimoto, Yuka Kato, Keisuke Shibata, Kaeko Nakamura, Hajime Yokota, Kei Yamada, Jin Narumoto
Purpose To evaluate pineal volume in patients with Alzheimer disease (AD), patients with mild cognitive impairment (MCI), and healthy control subjects and to correlate the findings with results of cognitive testing and brain parenchymal volumes. Materials and Methods The ethics committee approved this retrospective study. The participants included 63 patients with AD, 33 patients with MCI, and 24 healthy control subjects. There were 36 men and 84 women, with a mean age (±standard deviation) of 76.7 years ± 7...
July 26, 2017: Radiology
https://www.readbyqxmd.com/read/28733812/melatonin-increases-reactive-aggression-in-humans
#10
Jinting Liu, Ru Zhong, Wei Xiong, Haibo Liu, Christoph Eisenegger, Xiaolin Zhou
OBJECTIVE: Melatonin, a hormone released preferentially by the pineal gland during the night, affects circadian rhythms and aging processes. As animal studies have shown that melatonin increases resident-intruder aggression, this study aimed to investigate the impact of melatonin treatment on human aggression. METHODS: In a double-blind, randomized, placebo-controlled between-participant design, 63 healthy male volunteers completed the Taylor Aggression Paradigm (TAP) after oral administration of melatonin or placebo...
July 21, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28730123/iprgcs-possible-causation-accounts-for-the-higher-prevalence-of-sleep-disorders-in-glaucoma-patients
#11
Zhen-Zhen Guo, Shan-Ming Jiang, Li-Ping Zeng, Li Tang, Ni Li, Zhu-Ping Xu, Xin Wei
Sleep accounts for a third of one's lifetime, partial or complete deprivation of sleep could elicit sever disorders of body function. Previous studies have reported the higher prevalence of sleep disorders in glaucoma patients, but the definite mechanism for this phenomenon is unknown. On the other hand, it is well known by us that the intrinsically photosensitive retinal ganglion cells (ipRGCs) serve additional ocular functions, called non-image-forming (NIF) functions, in the regulation of circadian rhythm, melatonin secretion, sleep, mood and others...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28728370/endotoxin-induced-inflammation-disturbs-melatonin-secretion-in-ewe
#12
Andrzej Przemysław Herman, Karolina Wojtulewicz, Joanna Bochenek, Agata Krawczyńska, Hanna Antushevich, Bartosz Pawlina, Marlena Zielińska-Góska, Anna Herman, Katarzyna Romanowicz, Dorota Tomaszewska-Zaremba
The study was designed to determine the effect of intravenous administration of bacterial endotoxin - lipopolysaccharide (LPS) - on the nocturnal secretion of melatonin and on the expression of enzymes of the melatonin biosynthetic pathway in the pineal gland of ewes, taking into account two different photoperiodic conditions: short night (SN; n = 12) and long night (LN; n = 12). Endotoxin administration lowered (P < 0.05) levels of circulating melatonin in animals from LN photoperiod only during the first hour after treatment, while in ewes from SN photoperiod only in the third hour after the injection...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28724215/melatonin-inhibits-proliferation-and-invasion-via-repression-of-mirna-155-in-glioma-cells
#13
Junyi Gu, Zhongsheng Lu, Chenghong Ji, Yuchao Chen, Yuzhao Liu, Zhe Lei, Longqiang Wang, Hong-Tao Zhang, Xiangdong Li
Melatonin, an indolamine mostly synthesized in the pineal gland, exerts the anti-cancer effect by various mechanisms in glioma cells. Our previous study showed that miR-155 promoted glioma cell proliferation and invasion. However, the question of whether melatonin may inhibit glioma by regulating miRNAs has not yet been addressed. In this study, we found that melatonin (100μM, 1μM and 1nM) significantly inhibited the expression of miR-155 in human glioma cell lines U87, U373 and U251. Especially, the lowest expression of miR-155 was detected in 1μM melatonin-treated glioma cells...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28721827/melatonin-as-pleiotropic-molecule-with-therapeutic-potential-for-type-2-diabetes-and-cancer
#14
Marzena Wojcik, Michal Krawczyk, Pawel Wojcik, Katarzyna Cypryk, Lucyna Alicja Wozniak
The incidence both of diabetes, particularly type 2 (T2DM), and cancer is increasing worldwide, making these diseases growing global health problem along with increasing healthcare expenditures. The current therapeutic approach for the treatment of these multifactorial diseases is far from satisfactory. Therefore, there is still considerable interest in searching new therapeutic strategies with the use of both natural and synthetic compounds exhibiting higher efficiency and lower toxicity compared to medicines used currently in clinical practice...
July 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28719464/nuclear-crx-and-foxj1-expression-differentiates-non-germ-cell-pineal-region-tumors-and-supports-the-ependymal-differentiation-of-papillary-tumor-of-the-pineal-region
#15
Shannon Coy, Adrian M Dubuc, Sonika Dahiya, Keith L Ligon, Alexandre Vasiljevic, Sandro Santagata
Papillary tumor of the pineal region (PTPR) is a neuroepithelial neoplasm first described in 2003. Despite the anatomic association of PTPR with the pineal gland, the features of these tumors resemble those of the ependymal circumventricular subcommissural organ (SCO) of the posterior third ventricle. Given the presumed distinct derivation of PTPR and pineal parenchymal tumors, we hypothesized that expression of lineage-specific transcription factors could distinguish these tumors and provide additional insight into the differentiation of PTPR...
July 17, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28716942/maternal-photoperiod-programs-hypothalamic-thyroid-status-via-the-fetal-pituitary-gland
#16
Cristina Sáenz de Miera, Béatrice Bothorel, Catherine Jaeger, Valérie Simonneaux, David Hazlerigg
In wild mammals, offspring development must anticipate forthcoming metabolic demands and opportunities. Within species, different developmental strategies may be used, dependent on when in the year conception takes place. This phenotypic flexibility is initiated before birth and is linked to the pattern of day length (photoperiod) exposure experienced by the mother during pregnancy. This programming depends on transplacental communication via the pineal hormone melatonin. Here, we show that, in the Siberian hamster (Phodopus sungorus), the programming effect of melatonin is mediated by the pars tuberalis (PT) of the fetal pituitary gland, before the fetal circadian system and autonomous melatonin production is established...
August 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28708271/melatonin-protects-against-the-pathological-cardiac-hypertrophy-induced-by-transverse-aortic-constriction-through-activating-pgc-1%C3%AE-in-vivo-and-in-vitro-studies
#17
Mengen Zhai, Zhenhua Liu, Bin Zhang, Lin Jing, Buying Li, Kaifeng Li, Xiuju Chen, Meng Zhang, Bo Yu, Kai Ren, Yang Yang, Wei Yi, Jian Yang, Jincheng Liu, Dinghua Yi, Hongliang Liang, Zhenxiao Jin, Russel J Reiter, Weixun Duan, Shiqiang Yu
Melatonin, a circadian molecule secreted by the pineal gland, confers a protective role against cardiac hypertrophy induced by hyperthyroidism, chronic hypoxia and isoproterenol. However, its role against pressure overload-induced cardiac hypertrophy and the underlying mechanisms remain elusive. In this study, we investigated the pharmacological effects of melatonin on pathological cardiac hypertrophy induced by transverse aortic constriction (TAC). Male C57BL/6 mice underwent TAC or sham surgery at day 0 and were then treated with melatonin (20 mg/kg/day, via drinking water) for 4 or 8 weeks...
July 14, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28707298/melatonin-receptors-molecular-pharmacology-and-signaling-in-the-context-of-system-bias
#18
REVIEW
Erika Cecon, Atsuro Oishi, Ralf Jockers
Melatonin, N-acetyl-5-methoxytryptamine, an evolutionally old molecule, is produced by the pineal gland in vertebrates and it binds with high affinity to melatonin receptors, which are members of the G protein-coupled receptor family. Among the multiple effects attributed to melatonin we will focus here on those that are dependent on the activation of the two mammalian MT1 and MT2 melatonin receptors. We briefly summarize the latest developments on synthetic melatonin receptor ligands, including multi-target-directed ligands, and the characterization of signaling-biased ligands...
July 13, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28694154/short-photoperiod-reverses-obesity-in-siberian-hamsters-via-sympathetically-induced-lipolysis-and-browning-in-adipose-tissue
#19
REVIEW
Vitaly Ryu, Eleen Zarebidaki, H Elliott Albers, Bingzhong Xue, Timothy J Bartness
Changes in photoperiod length are transduced into neuroendocrine signals by melatonin (MEL) secreted by the pineal gland triggering seasonally adaptive responses in many animal species. Siberian hamsters, transferred from a long-day 'summer-like' photoperiod (LD) to a short-day 'winter-like' photoperiod (SD), exhibit a naturally-occurring reversal in obesity. Photoperiod-induced changes in adiposity are mediated by the duration of MEL secretion and can be mimicked by exogenously administered MEL into animals housed in LD...
July 7, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28693284/%C3%AE-human-chorionic-gonadotropin-secreting-intracranial-germ-cell-tumor-associated-with-high-testosterone-in-an-adult-man-a-case-report
#20
Wen-Ping Yang, Hung-Yu Chien, Yi-Chun Lin
A 38-year-old male patient presented with general weakness, polydipsia and a body weight loss of 10 kg in two years. Hypopituitarism with central hypothyroidism and central adrenal insufficiency were noted at Taipei City Hospital (Taipei, Taiwan). However, hypogonadotropic hypergonadism was also observed. The patient was diagnosed with an intracranial β-human chorionic gonadotropin (β-hCG) secreting germ-cell tumor, and brain magnetic resonance imaging revealed that the tumor involved the pineal gland, stalk, posterior pituitary gland, right basal ganglion, hypothalamus, corpus callosum and posterior hippocampus...
July 2017: Oncology Letters
keyword
keyword
90186
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"