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https://www.readbyqxmd.com/read/28545157/the-aminoestrogen-prolame-increases-recognition-memory-and-hippocampal-neuronal-spine-density-in-aged-mice
#1
Alfonso Diaz, Samuel Treviño, Rubén Vázquez-Roque, Berenice Venegas, Blanca Espinosa, Gonzalo Flores, Juan Manuel Fernández-G, Luis F Montaño, Jorge Guevara
The aging brain shows biochemical and morphological changes in the dendrites of pyramidal neurons from the limbic system associated with memory loss. Prolame (N-(3-hydroxy-1,3,5 (10) -estratrien-17β-yl) -3-hydroxypropylamine) is a non-feminizing aminoestrogen with antithrombotic activity that prevents neuronal deterioration, oxidative stress and neuroinflammation. Our aim was to evaluate the effect of prolame on motor and cognitive processes, as well as its influence on the dendritic morphology of neurons at the CA1, CA3 and granule cells of the dentate gyrus (DG) regions of hippocampus (HP), and medium spiny neurons of the nucleus accumbens (NAcc) of aged mice...
May 25, 2017: Synapse
https://www.readbyqxmd.com/read/28544807/effects-of-teriparatide-on-joint-erosions-in-rheumatoid-arthritis-a-randomized-controlled-trial
#2
D H Solomon, J Kay, J Duryea, B Lu, M B Bolster, R A Yood, R Han, S Ball, C Coleman, E Lo, A Wohlfahrt, M Sury, M Yin, Z Yu, A Zak, E M Gravallese
BACKGROUND: Articular erosions correlate with disability in rheumatoid arthritis (RA). Biologic treatments for RA reduce erosion progression, but erosion healing occurs infrequently. The goal of this study was to assess the effects of the anabolic agent teriparatide on joint erosion volume in RA patients treated with a tumor necrosis factor inhibitor (TNFi). METHODS: We conducted a randomized controlled trial in 24 patients with erosive RA, osteopenia, and disease activity controlled on a TNFi for at least three months...
May 23, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28543873/effect-of-surgery-vs-observation-skeletal-5-year-outcomes-in-a-randomized-trial-of-patients-with-primary-hpt-the-siph-study
#3
Karolina Lundstam, Ansgar Heck, Kristin Godang, Charlotte Mollerup, Marek Baranowski, Ylva Pernow, Turid Aas, Ola Hessman, Thord Rosén, Jörgen Nordenström, Svante Jansson, Mikael Hellström, Jens Bollerslev
Mild primary hyperparathyroidism (PHPT) is known to affect the skeleton, even though patients usually are asymptomatic. Treatment strategies have been widely discussed. However, long-term randomized studies comparing parathyroidectomy to observation are lacking. The objective was to study the effect of parathyroidectomy (PTX) compared to observation (OBS) on bone mineral density (BMD) in g/cm(2) and T-scores, and on biochemical markers of bone turnover (P1NP and CTX-1), in a prospective randomized controlled study of patients with mild PHPT after 5 years of follow-up...
May 25, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28542068/reduced-cortical-excitatory-synapse-number-in-apoe4-mice-is-associated-with-increased-calcineurin-activity
#4
Aidan L Neustadtl, Charisse N Winston, Maia Parsadanian, Bevan S Main, Sonia Villapol, Mark P Burns
Synaptic loss is a symptom of Alzheimer's disease (AD) that is associated with the onset of cognitive decline and the loss of executive function. The strongest genetic risk factor for AD is the APOE4 allele, which results in both a greater risk of developing AD as well as an earlier age of onset of AD. Dendritic spines, the anatomical substrate of the excitatory synapse, are reduced in the cortex of humanized APOE4 mice but the reason for this synaptic decline is unknown. Calcineurin, a calcium/calmodulin dependent phosphatase, is a mediator of dendritic spine retraction...
May 24, 2017: Neuroreport
https://www.readbyqxmd.com/read/28539676/results-from-polish-spondyloarthritis-initiative-registry-polspi-methodology-and-data-from-the-first-year-of-observation
#5
Zofia Guła, Tacjana Barczyńska, Marek Brzosko, Jerzy Gąsowski, Sławomir Jeka, Katarzyna Jodłowska-Cicio, Beata Kwaśny-Krochin, Piotr Leszczyński, Łukasz Lubiński, Katarzyna Łosińska, Katarzyna Pawlak-Buś, Hanna Przepiera-Będzak, Włodzimierz Samborski, Małgorzata Schlabs, Maciej Siedlar, Dorota Sikorska, Jerzy Świerkot, Małgorzata Węgierska, Piotr Wiland, Mariusz Korkosz
OBJECTIVES: Report on one-year results from the Polish Spondyloarthritis Initiative registry (PolSPI), containing the cross-sectional analysis of clinical and imaging data as well as database methodology. MATERIAL AND METHODS: The PolSPI registry includes patients with axial (axSpA) and peripheral (perSpA) spondyloarthritis according to ASAS classification criteria, and/or patients with ankylosing spondylitis according to modified New York criteria, psoriatic arthritis according to CASPAR criteria, arthropathy in inflammatory bowel disease, reactive arthritis, juvenile spondyloarthritis or undifferentiated spondyloarthritis...
2017: Reumatologia
https://www.readbyqxmd.com/read/28538396/effects-of-teriparatide-versus-alendronate-for-treatment-of-postmenopausal-osteoporosis-a-meta-analysis-of-randomized-controlled-trials
#6
Ya-Kang Wang, Si-Qing Qin, Tao Ma, Wei Song, Ren-Qi Jiang, Jian-Bin Guo, Kun Li, Yu-Min Zhang
OBJECTIVES: Osteoporosis remains a clinical challenge. Teriparatide is an anabolic drug and alendronate is an antiresorptive agent; both are used in the treatment of osteoporosis. Comprehensive reviews investigating the comparative safety and efficacy of teriparatide versus alendronate are scarce. Therefore, we conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) to evaluate the safety and efficacy of teriparatide versus alendronate for the treatment of postmenopausal osteoporosis...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28537325/association-of-protein-intake-with-bone-mineral-density-and-bone-mineral-content-among-elderly-women-the-ostpre-fracture-prevention-study
#7
M Isanejad, J Sirola, J Mursu, H Kröger, M Tuppurainen, A T Erkkilä
It has been hypothesized that high protein intakes are associated with lower bone mineral content (BMC). Previous studies yield conflicting results and thus far no studies have undertaken the interaction of body mass index (BMI) and physical activity with protein intakes in relation to BMC and bone mineral density (BMD). OBJECTIVE: To evaluate the associations of dietary total protein (TP), animal protein (AP) and plant protein (PP) intakes with BMC and BMD and their changes. We tested also the interactions of protein intake with, obesity (BMI ≤30 vs...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28536824/association-between-low-bone-mineral-density-and-fibromyalgia-a-meta-analysis
#8
Young Ho Lee, Gwan Gyu Song
We aimed to evaluate the relationship between bone mineral density (BMD) and fibromyalgia (FM). Meta-analyses were performed comparing BMD in FM patients and healthy controls, and in FM patients in subgroups based on ethnicity, BMD site, age, sex, and measurement method. Twelve studies including 695 FM patients and 784 controls were selected. Meta-analysis by ethnicity revealed a significantly lower BMD in the FM group in Caucasian populations [standardized mean difference (SMD) = -0.144, 95% CI = -0.271-(-0...
May 23, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28535619/prevalence-and-incidence-of-osteoporotic-fractures-in-patients-on-long-term-glucocorticoid-treatment-for-rheumatic-diseases-the-glucocorticoid-induced-osteoporosis-tool-giotto-study
#9
M Rossini, O Viapiana, M Vitiello, N Malavolta, G La Montagna, S Maddali Bongi, O Di Munno, R Nuti, C U Manzini, C Ferri, L Bogliolo, A Mathieu, F Cantatore, A Del Puente, M Muratore, W Grassi, B Frediani, G Saviola, P Delvino, L Mirone, G Ferraccioli, G Tripi, I Piazza, D Gatti
Osteoporosis and fractures are common and invalidating consequences of chronic glucorticoid (GC) treatment. Reliable information regarding the epidemiology of GC induced osteoporosis (GIOP) comes exclusively from the placebo group of randomized clinical trials while observational studies are generally lacking data on the real prevalence of vertebral fractures, GC dosage and primary diagnosis. The objective of this study was to evaluate the prevalence and incidence of osteoporotic fractures and to identify their major determinants (primary disease, GC dosage, bone mineral density, risk factors, specific treatment for GIOP) in a large cohort of consecutive patients aged >21 years, on chronic treatment with GC (≥5 mg prednisone - PN - equivalent) and attending rheumatology centers located all over Italy...
May 22, 2017: Reumatismo
https://www.readbyqxmd.com/read/28533515/perivascular-aqp4-dysregulation-in-the-hippocampal-ca1-area-after-traumatic-brain-injury-is-alleviated-by-adenosine-a2a-receptor-inactivation
#10
Zi-Ai Zhao, Ping Li, Shi-Yang Ye, Ya-Lei Ning, Hao Wang, Yan Peng, Nan Yang, Yan Zhao, Zhuo-Hang Zhang, Jiang-Fan Chen, Yuan-Guo Zhou
Traumatic brain injury (TBI) can induce cognitive dysfunction due to the regional accumulation of hyperphosphorylated tau protein (p-tau). However, the factors that cause p-tau to concentrate in specific brain regions remain unclear. Here, we show that AQP4 polarization in the perivascular astrocytic end feet was impaired after TBI, which was most prominent in the ipsilateral brain tissue surrounding the directly impacted region and the contralateral hippocampal CA1 area and was accompanied by increased local p-tau, changes in dendritic spine density and morphology, and upregulation of the adenosine A2A receptor (A2AR)...
May 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28529579/expression-and-correlation-analysis-of-regiv-and-vascular-endothelial-growth-factors-vegf-a-and-vegf-c-in-metastatic-spinal-tumors
#11
Shuquan Zhang, Guanjie Zhao, Yi Zhao, Rui Gu, Chuangang Peng, Zhe Pu, Minfei Wu
The expression and correlation analysis of the regenerating gene family member 4 (RegIV) and vascular endothelial growth factors (VEGF-A and VEGF-C) in metastatic spinal tumors were studied. Fifteen patients with metastatic spinal tumors who underwent operation in our hospital from January 2011 to January 2013 were selected into this study. The expression level of tumor tissues in patients with spinal metastasis and RegIV, VEGF-A and VEGF-C of the corresponding paracancer normal tissue samples were evaluated by immunohistochemical staining method and the correlation between the expression of RegIV, VEGF-A and VEGF-C was analyzed...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28528849/extracellular-low-n-oligomers-of-tau-cause-selective-synaptotoxicity-without-affecting-cell-viability
#12
Senthilvelrajan Kaniyappan, Ram Reddy Chandupatla, Eva-Maria Mandelkow, Eckhard Mandelkow
INTRODUCTION: Tau-mediated toxicity in Alzheimer's disease is thought to operate through low-n oligomers, rather than filamentous aggregates. However, the nature of oligomers and pathways of toxicity are poorly understood. Therefore, we investigated structural and functional aspects of highly purified oligomers of a pro-aggregant tau species. METHODS: Purified oligomers of the tau repeat domain were characterized by biophysical and structural methods. Functional aspects were investigated by cellular assays ((3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium) bromide assay of cell viability, lactate dehydrogenase release assay [for cell toxicity], reactive oxygen species production, and calcium assay), combined with analysis of neuronal dendritic spines exposed to oligomers...
May 18, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28527105/association-between-lumbar-bone-mineral-density-and-serum-uric-acid-in-postmenopausal-women-a-cross-sectional-study-of-healthy-chinese-population
#13
Wen Han, Xiaojuan Bai, Nan Wang, Lulu Han, Xuefeng Sun, Xiangmei Chen
Partial correlation and regression analyses were used in this study. We showed that there is a linear relationship between bone mineral density and serum uric acid within the normal physiologic range, and higher serum uric acid levels had a protective effect on bone loss in postmenopausal osteoporosis. PURPOSE: The significance of the relationship between lumbar bone mineral density (()BMD) and serum uric acid (SUA) levels is unclear. The aims of this study were to investigate on a population-level the association between lumbar BMD and SUA within the normal physiologic range and to determine whether SUA plays a protective role in bone loss in healthy postmenopausal Chinese women...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28524815/anchoring-high-concentrations-of-syngap-at-postsynaptic-densities-via-liquid-liquid-phase-separation
#14
Menglong Zeng, Guanhua Bai, Mingjie Zhang
SynGAP, encoded by SYNGAP1, is a Ras/Rap GTPase activator specifically expressed in the nervous systems. SynGAP is one of the most abundant proteins in the postsynaptic densities (PSDs) of excitatory synapses and acts as a critical synaptic activity brake by tuning down synaptic GTPase activities. Mutations of SYNGAP1 have been frequently linked to brain disorders including intellectual disability, autisms, and seizure. SynGAP has been shown to undergo fast dispersions from synapses in response to stimulations, a strategy that neurons use to control the specific activities of the enzyme within the tiny, semi-open compartments in dendritic spines...
May 19, 2017: Small GTPases
https://www.readbyqxmd.com/read/28524056/dermatitis-herpetiformis-and-bone-mineral-density-analysis-of-a-french-cohort-of-53-patients
#15
Coralie Lheure, Saskia Ingen-Housz-Oro, Sandra Guignard, Rachida Inaoui, Brigitte Jolivet, Xavier Chevalier, Pierre Wolkenstein, Bruno Fautrel, Oliver Chosidow
The characteristics of patients with dermatitis herpetiformis (DH) in France is poorly documented. Furthermore, the risk of fractures and bone mineral density (BMD) in DH remain under-described, and recommendations for systematic screening for osteoporosis in DH are lacking. To describe the characteristics of DH in a large French cohort and evaluate the association between BMD and features of osteoporosis. Patients were recruited from the French Association of Gluten Intolerants (AFDIAG) and a single university dermatology department...
May 19, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/28523940/delay-in-estrogen-commencement-is-associated-with-lower-bone-mineral-density-in-turner-syndrome
#16
H H Nguyen, P Wong, B J Strauss, G Jones, P R Ebeling, F Milat, A Vincent
OBJECTIVE: Turner syndrome (TS) is associated with hypogonadism, osteoporosis and fractures. We investigated the prevalence and risk factors for low bone density and fractures in a TS cohort. METHODS: We included 76 TS patients (median age 28.5 years) attending a tertiary hospital between 1998 and 2015 who underwent dual-energy X-ray absorptiometry. Spine and femoral neck (FN) areal bone mineral density (aBMD) were compared with those of a control group. To adjust for smaller bone size, bone mineral apparent density (BMAD) was calculated...
May 19, 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28523260/combination-therapy-of-raloxifene-and-alendronate-for-treatment-of-osteoporosis-in-elderly-women
#17
Mi Jung Um, Eun A Cho, Hyuk Jung
OBJECTIVES: To evaluate and compare the efficacy and safety of the combination of raloxifene and alendronate with those of monotherapies in elderly women with osteoporosis. METHODS: Sixty-two postmenopausal women (mean age 63.5 ± 0.5 years) attending gynecologic osteoporosis clinics with established osteoporosis were randomly allocated to one of four treatment groups and monitored for 3 years. All patients enrolled in this study, including those in the control group (n = 14), received 1...
April 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28523056/low-bone-mineral-density-in-chronic-hepatitis-b-virus-infection-a-case-control-study
#18
Zengfa Huang, Hui Wei, Cheng Cheng, Shuhua Yang, Jing Wang, Xianzhe Liu
OBJECTIVE: Osteoporosis is the well-known major complication in chronic hepatitis B virus (HBV) infection. Fewer reports are available of the relationship between bone loss and chronic HBV infection. We investigated the bone mineral density (BMD) and prevalence of osteoporosis in chronic HBV patients in comparison with healthy subjects. METHODS: We assessed 148 chronic HBV patients and 148 age- and gender-matched healthy controls by dual energy X-ray absorptiometry (DEXA) for determination of BMD...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28522792/transgenic-autoinhibition-of-p21-activated-kinase-exacerbates-synaptic-impairments-and-fronto-dependent-behavioral-deficits-in-an-animal-model-of-alzheimer-s-disease
#19
Cyril Bories, Dany Arsenault, Myriam Lemire, Cyntia Tremblay, Yves De Koninck, Frédéric Calon
Defects in p21-activated kinase (PAK) lead to dendritic spine abnormalities and are sufficient to cause cognition impairment. The decrease in PAK in the brain of Alzheimer's disease (AD) patients is suspected to underlie synaptic and dendritic disturbances associated with its clinical expression, particularly with symptoms related to frontal cortex dysfunction. To investigate the role of PAK combined with Aβ and tau pathologies (3xTg-AD mice) in the frontal cortex, we generated a transgenic model of AD with a deficit in PAK activity (3xTg-AD-dnPAK mice)...
May 16, 2017: Aging
https://www.readbyqxmd.com/read/28522608/altered-learning-memory-and-social-behavior-in-type-1-taste-receptor-subunit-3-knockout-mice-is-associated-with-neuronal-dysfunction
#20
Bronwen Martin, Rui Wang, Wei-Na Cong, Caitlin M Daimon, Wells W Wu, Bin Ni, Kevin G Becker, Elin Lehrmann, William H Wood, Yongqing Zhang, Harmonie Etienne, Jaana van Gastel, Abdelkrim Azmi, Jonathan Janssens, Stuart Maudsley
The type 1 taste receptor member 3 (T1R3) is a G protein-coupled receptor (GPCR) involved in sweet taste perception. Besides the tongue, the T1R3 receptor is highly expressed in brain areas implicated in cognition, including the hippocampus and cortex. As cognitive decline is often preceded by significant metabolic or endocrinological dysfunctions, regulated by the sweet taste perception system, we hypothesized that a disruption of the sweet taste perception in the brain could have a key role in the development of cognitive dysfunction...
May 18, 2017: Journal of Biological Chemistry
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