Read by QxMD icon Read

orly lazarov

Dimitrinka Y Atanasova, Nikolay D Dimitrov, Nikolai E Lazarov
The carotid body (CB) is a major peripheral arterial chemoreceptor organ that evokes compensatory reflex responses so as to maintain gas homeostasis. It is dually innervated by sensory fibers from petrosal ganglion (PG) neurons, and autonomic fibers from postganglionic sympathetic neurons of the superior cervical ganglion (SCG) and parasympathetic vasomotor fibers of intrinsic ganglion cells in the CB. The presence of nitric oxide (NO), a putative gaseous neurotransmitter substance in a number of neuronal and non-neuronal structures, was examined in the CB, PG and SCG of the rat using nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-d) histochemistry, nitric oxide synthase (NOS) immunohistochemistry and retrograde tracing...
September 28, 2016: Acta Histochemica
Carolyn Hollands, Nancy Bartolotti, Orly Lazarov
New neurons incorporate into the granular cell layer of the dentate gyrus throughout life. Neurogenesis is modulated by behavior and plays a major role in hippocampal plasticity. Along with older mature neurons, new neurons structure the dentate gyrus, and determine its function. Recent data suggest that the level of hippocampal neurogenesis is substantial in the human brain, suggesting that neurogenesis may have important implications for human cognition. In support of that, impaired neurogenesis compromises hippocampal function and plays a role in cognitive deficits in Alzheimer's disease mouse models...
2016: Frontiers in Neuroscience
Joost P van Melle, Djoeke Wolff, Jürgen Hörer, Emre Belli, Bart Meyns, Massimo Padalino, Harald Lindberg, Jeffrey P Jacobs, Ilkka P Mattila, Håkan Berggren, Rolf M F Berger, Rene Prêtre, Mark G Hazekamp, Morten Helvind, Matej Nosál, Tomas Tlaskal, Jean Rubay, Stojan Lazarov, Alexander Kadner, Viktor Hraska, José Fragata, Marco Pozzi, George Sarris, Guido Michielon, Duccio di Carlo, Tjark Ebels
OBJECTIVE: The objective of this European multicenter study was to report surgical outcomes of Fontan takedown, Fontan conversion and heart transplantation (HTX) for failing Fontan patients in terms of all-cause mortality and (re-)HTX. METHODS: A retrospective international study was conducted by the European Congenital Heart Surgeons Association among 22 member centres. Outcome of surgery to address failing Fontan was collected in 225 patients among which were patients with Fontan takedown (n=38; 17%), Fontan conversion (n=137; 61%) or HTX (n=50; 22%)...
July 15, 2016: Heart: Official Journal of the British Cardiac Society
Orly Lazarov, Carolyn Hollands
Alzheimer's disease, the most prevalent form of dementia in the elderly, is characterized by progressive memory loss and cognitive dysfunction. It has become increasingly clear that while neuronal cell loss in the entorhinal cortex and hippocampus occurs in Alzheimer's disease, it is preceded by a long period of deficits in the connectivity of the hippocampal formation that contributes to the vulnerability of these circuits. Hippocampal neurogenesis plays a role in the maintenance and function of the dentate gyrus and hippocampal circuitry...
March 2016: Progress in Neurobiology
Nancy Bartolotti, Laura Segura, Orly Lazarov
The mechanism underlying impaired learning and memory in Alzheimer's disease is not fully elucidated. The phosphorylation of cyclic-AMP response element binding protein (pCREB) in the hippocampus is thought to be a critical initiating step in the formation of long-term memories. Here, we tested CRE-driven gene expression following learning in mice harboring the familial Alzheimer's disease-linked APPswe/PS1ΔE9 mutations using CRE-β galactosidase reporter. We show that young adult APPswe/PS1ΔE9 mice exhibit impaired recognition memory and reduced levels of pCREB, and its cofactors CREB binding protein (CBP) and p-300 following a learning task, compared to their wild type littermate counterparts...
2015: Journal of Alzheimer's Disease: JAD
Manol Lazarov, Thomas De Bo, Bart Poffyn, Gwen Sys
OBJECTIVE: In pursuance of thoroughly understanding and facilitating the evaluation of the radiological changes in the preloaded bone by Compliant Pre-Stress osseointegration (Compress Biomet, Warsaw, Indiana) a new staging method was created depicting four stages. METHODS: Two cohorts (10 and 17 patients resp., not-receiving and receiving chemotherapy) were compared in terms of progression of osseointegration. Based on the changes at the bone-metal interface seen on röntgenorgrams four stages were defined: stage 0: immediate postoperative status, no ingrowth, or noncalcified callus; stage 1: early mineralization, calcified callus; stage 2: mature mineralization; and stage 3: hypertrophy at the level of the pins...
2015: BioMed Research International
Jacqueline A Bonds, Yafit Kuttner-Hirshler, Nancy Bartolotti, Matthew K Tobin, Michael Pizzi, Robert Marr, Orly Lazarov
Presenilin-1 (PS1), the catalytic core of the aspartyl protease γ-secretase, regulates adult neurogenesis. However, it is not clear whether the role of neurogenesis in hippocampal learning and memory is PS1-dependent, or whether PS1 loss of function in adult hippocampal neurogenesis can cause learning and memory deficits. Here we show that downregulation of PS1 in hippocampal neural progenitor cells causes progressive deficits in pattern separation and novelty exploration. New granule neurons expressing reduced PS1 levels exhibit decreased dendritic branching and dendritic spines...
2015: PloS One
Keith P McKenna, Florian Hofer, Daniel Gilks, Vlado K Lazarov, Chunlin Chen, Zhongchang Wang, Yuichi Ikuhara
The complex and intriguing properties of the ferrimagnetic half metal magnetite (Fe3O4) are of continuing fundamental interest as well as being important for practical applications in spintronics, magnetism, catalysis and medicine. There is considerable speculation concerning the role of the ubiquitous antiphase boundary (APB) defects in magnetite, however, direct information on their structure and properties has remained challenging to obtain. Here we combine predictive first principles modelling with high-resolution transmission electron microscopy to unambiguously determine the three-dimensional structure of APBs in magnetite...
2014: Nature Communications
S Nikolova, D Toneva, Y Yordanov, N Lazarov
The squamous part of the occipital bone is a place of many different variations. They are a result of faulty ossification in the occipital squama or due to the presence of sutural bones in the lambda region. As their differentiation is intricate because of the various criteria used, the issue of their recognition in the adult skull still remains difficult even though they can be clearly distinguished at a younger age. The aim of the present study was to compare the frequency of interparietal, preinterparietal and sutural bones in the lambda region in medieval male and female cranial series as well as between medieval and contemporary male series from Bulgaria...
November 2014: Folia Morphologica (Warsz)
C Rauert, S Harrad, M Stranger, B Lazarov
UNLABELLED: Numerous studies have reported elevated concentrations of brominated flame retardants (BFRs) in dust from indoor micro-environments. Limited information is available, however, on the pathways via which BFRs in source materials transfer to indoor dust. The most likely hypothesized pathways are (a) volatilization from the source with subsequent partitioning to dust, (b) abrasion of the treated product, transferring microscopic fibers or particles to the dust (c) direct uptake to dust via contact between source and dust...
August 2015: Indoor Air
Amit Lazarov, Nira Liberman, Haggai Hermesh, Reuven Dar
Pervasive doubts are a central feature of obsessive-compulsive disorder (OCD). We have theorized that obsessive doubts can arise in relation to any internal state and lead to compensatory reliance on more discernible substitutes (proxies), including rules and rituals. Previous findings corroborated this hypothesis, but were based on students with high and low OCD tendencies and did not control for anxiety. The present study tested our hypothesis in OCD participants using both anxiety disorders and nonclinical controls...
November 2014: Journal of Abnormal Psychology
Matthew K Tobin, Jacqueline A Bonds, Richard D Minshall, Dale A Pelligrino, Fernando D Testai, Orly Lazarov
This review covers the pathogenesis of ischemic stroke and future directions regarding therapeutic options after injury. Ischemic stroke is a devastating disease process affecting millions of people worldwide every year. The mechanisms underlying the pathophysiology of stroke are not fully understood but there is increasing evidence demonstrating the contribution of inflammation to the drastic changes after cerebral ischemia. This inflammation not only immediately affects the infarcted tissue but also causes long-term damage in the ischemic penumbra...
October 2014: Journal of Cerebral Blood Flow and Metabolism
B Bechev, J Kornovski, I Kostov, I Lazarov
Stress incontinence is involuntary loss of urine that occurs during periods of increased intraabdominal pressure, such as sneezing, coughing or exercise. Retropubic Burch colposuspension has been considered by many to be the "gold standard" procedure for treatment of female stress urinary incontinence for almost 50 years. The firs reported retropubic surgery performed via the laparoscopic approach was described by Vancaillie and Schuessler in 1991. We present a clinical case of a female patient with stress incontinence who has been operated by laparoscopic approach by our team...
2014: Akusherstvo i Ginekologii︠a︡
Hartmut Koeppen, Wei Yu, Jiping Zha, Ajay Pandita, Elicia Penuel, Linda Rangell, Rajiv Raja, Sankar Mohan, Rajesh Patel, Rupal Desai, Ling Fu, An Do, Vaishali Parab, Xiaoling Xia, Tom Januario, Sharianne G Louie, Ellen Filvaroff, David S Shames, Ignacio Wistuba, Marina Lipkind, Jenny Huang, Mirella Lazarov, Vanitha Ramakrishnan, Lukas Amler, See-Chun Phan, Premal Patel, Amy Peterson, Robert L Yauch
PURPOSE: In a recent phase II study of onartuzumab (MetMAb), patients whose non-small cell lung cancer (NSCLC) tissue scored as positive for MET protein by immunohistochemistry (IHC) experienced a significant benefit with onartuzumab plus erlotinib (O+E) versus erlotinib. We describe development and validation of a standardized MET IHC assay and, retrospectively, evaluate multiple biomarkers as predictors of patient benefit. EXPERIMENTAL DESIGN: Biomarkers related to MET and/or EGF receptor (EGFR) signaling were measured by IHC, FISH, quantitative reverse transcription PCR, mutation detection techniques, and ELISA...
September 1, 2014: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
N Lazarov, L Lazarov, S Lazarov
UNLABELLED: A cohort of 215 female patients with early epithelial ovarian cancer, researched for 13 year period (2000-2012). The authors are setting a goal to investigate how does the amount of chemotherapeutic medicaments, administered as adjuvant therapy influences the survival of these patients. CONCLUSION: The application of three or more chemotherapeutic agents does not improve the survival of female patients with early epithelial ovarian cancer, indicated for chemotherapy...
2013: Akusherstvo i Ginekologii︠a︡
Orly Lazarov, Robert A Marr
Neural stem cells are maintained in the subgranular layer of the dentate gyrus and in the subventricular zone in the adult mammalian brain throughout life. Neurogenesis is continuous, but its extent is tightly regulated by environmental factors, behavior, hormonal state, age, and brain health. Increasing evidence supports a role for new neurons in cognitive function in rodents. Recent evidence delineates significant similarities and differences between adult neurogenesis in rodents and humans. Being context-dependent, neurogenesis in the human brain might be manifested differently than in the rodent brain...
2013: Frontiers in Aging Neuroscience
N Lazarov, L Lazarov, S Lazarov
OBJECTIVE: The authors present and analyze the modern concepts of the role of surgery as a prognostic factor for patients with early epithelial ovarian cancer (st. I-II). They review, synthetize and summarize the information from 15 studies, published in the recent years, and concerning the subject. CONCLUSION: Surgery treatment for early epithelial ovarian cancer is one of the most important prognostic factors. The appropriate surgical performance contributes either for complete staging or for optimal primary cytoreduction and strongly influence the development and outcome of disease...
2013: Akusherstvo i Ginekologii︠a︡
N Lazarov, L Lazarov, S Lazarov
UNLABELLED: The authors present and analyze the modem concepts of the role of adjuvant chemotherapy as a prognostic factor for patients with early epithelial ovarian cancer (st. I-II). They review, synthetize and summarize the information from studies and researches, published in the recent years, and concerning the subject. CONCLUSION: Adjuvant chemotherapy for early epithelial ovarian cancer improves overall survival of patients having tumors with grade 2 or 3, stagelC or grater and suboptimal surgical staging...
2013: Akusherstvo i Ginekologii︠a︡
Stanimir G Georgiev, Stojan D Lazarov, Ivajlo D Mitev, Alexandra Z Latcheva, Georgi A Christov, Ivan G Velkovski, Plamen D Mitev
BACKGROUND: The study evaluates the long-term results of surgery for anomalous left coronary artery from the pulmonary artery (ALCAPA) with special attention on the left ventricular (LV) function and mitral regurgitation. METHODS: Twenty-one children underwent surgery for ALCAPA over 23 years (1987-2010). All patients underwent establishment of a two-coronary system, by direct reimplantation (n = 13) or by intrapulmonary tunnel technique (n = 8), with concomitant mitral valve repair in one...
July 1, 2012: World Journal for Pediatric & Congenital Heart Surgery
Yuan-Shih Hu, Nancy Long, Gustavo Pigino, Scott T Brady, Orly Lazarov
Experience of mice in a complex environment enhances neurogenesis and synaptic plasticity in the hippocampus of wild type and transgenic mice harboring familial Alzheimer's disease (FAD)-linked APPswe/PS1ΔE9. In FAD mice, this experience also reduces levels of tau hyperphosphorylation and oligomeric β-amyloid. Although environmental enrichment has significant effects on brain plasticity and neuropathology, the molecular mechanisms underlying these effects are unknown. Here we show that environmental enrichment upregulates the Akt pathway, leading to the downregulation of glycogen synthase kinase 3β (GSK3β), in wild type but not FAD mice...
2013: PloS One
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"