News Article | February 15, 2017
A new investigational delivery method for localized vaginal estrogen therapy that utilizes an applicator free softgel to alleviate moderate-to-severe vaginal pain during intercourse (dyspareunia), a symptom of vulvar and vaginal atrophy (VVA), received high rates of patient satisfaction among post-menopausal women, according to post-trial survey results published in the journal Menopause. "These survey results show that something as simple as a change to a more elegant delivery system that is easier to use and not messy might empower more post-menopausal women to seek prescription treatment for VVA, and perhaps help them stay with the application guidelines for longer," said study first author Sheryl Kingsberg, PhD, Division Chief, OB/GYN Behavioral Medicine, UH Cleveland Medical Center; Professor of Obstetrics and Gynecology and Psychiatry, Case Western Reserve University School of Medicine; and first author of the survey analysis. "We still have to find better ways to educate the millions of women suffering with VVA about the symptoms, however, so that more of them know it is common, decide to discuss treatment with their healthcare professional, and seek symptom relief with appropriate treatment." The new results were part of a multi-center randomized, placebo-controlled phase 3 clinical trial for TX004HR, an investigational bio-identical 17β-estradiol applicator free vaginal softgel capsule. Previous publications have shown TX004HR to be safe and effective at alleviating symptoms of VVA. The survey, which included 731 respondents with a 96 percent response rate, sought to quantify participants' satisfaction with the application method and overall treatment delivery system. The majority of women taking either TX004HR or placebo (85.4 - 92.1 percent) found the product easy to use. VVA is a chronic condition associated with genitourinary syndrome of menopause (GSM). VVA affects 50 to 70 percent of post-menopausal women, and is characterized by pain with sexual activity, dryness, and discomfort. Current on-the-market treatments for VVA include both over-the-counter creams and moisturizers as well as several safe and effective prescription treatments in cream, tablet, ring or oral form. Previous survey research completed by Dr. Kingsberg and others has shown that while 32 million women may be experiencing symptomatic VVA and suffering from related impacts on sexual function, interpersonal relationships, self-esteem and overall quality of life, only 7 percent are currently using a prescription therapy to alleviate symptoms. Though they may suffer from physical and emotional pain as a result of VVA, women may not feel comfortable discussing these symptoms with a healthcare professional, may not recognize the symptoms as treatable, may not fully understand the treatment options available, or if they did receive treatment, found the current prescription treatment options inconvenient, messy, or uncomfortable to use. Financial disclosure: Dr. Kingsberg has served as a consultant for TherapeuticsMD, the manufacturer of TX004HR, as well as Acerus Pharmaceuticals, AMAG Pharmaceuticals, Bayer Healthcare, Emotional Brain, Materna, Novo Nordisk, Nuelle, Palatin Technologies, Pfizer, Sermonix Pharmaceuticals, Shionogi Inc. and Valeant Pharmaceuticals. Founded in 1866, University Hospitals serves the needs of over 1 million patients per year through an integrated network of 18 hospitals, more than 40 outpatient health centers and 200 physician offices in 15 counties throughout northern Ohio. The system's flagship academic medical center, University Hospitals Cleveland Medical Center, located on a 35-acre campus in Cleveland's University Circle, is affiliated with Case Western Reserve University School of Medicine. The main campus also includes University Hospitals Rainbow Babies & Children's Hospital, ranked among the top children's hospitals in the nation; University Hospitals MacDonald Women's Hospital, Ohio's only hospital for women; and University Hospitals Seidman Cancer Center, part of the NCI-designated Case Comprehensive Cancer Center. UH is home to some of the most prestigious clinical and research programs in the nation, including cancer, pediatrics, women's health, orthopedics, radiology, neuroscience, cardiology and cardiovascular surgery, digestive health, dermatology, transplantation and urology. UH Cleveland Medical Center is perennially among the highest performers in national ranking surveys, including "America's Best Hospitals" from U.S. News & World Report. UH is also home to Harrington Discovery Institute at University Hospitals - part of The Harrington Project for Discovery & Development. UH is the second largest employer in northern Ohio with 26,000 employees. For more information, go to UHhospitals.org.
Vuilleumier P.,University of Geneva |
Vuilleumier P.,University Hospitals Geneva Medical Center
Current Opinion in Neurology | Year: 2015
Purpose of review: It is increasingly recognized that affective values associated with visual stimuli can influence visual perception, attention, and eye movements. Recent research has begun to uncover the brain mechanisms mediating these phenomena. The present review summarizes the main paradigms and findings demonstrating emotional and motivational influences on visual processing. Recent findings: Several pathways have been identified for enhancing neural responses of cortical visual areas to stimuli with intrinsic emotional value (e.g., facial expressions, social scenes, and others), including projections from the amygdala and ascending modulatory neurotransmitter systems from the brainstem. These pathways can guide attention and gaze to emotionally salient information with either negative (threatening) or positive (rewarding) associations. In addition, abundant research in recent years suggests that probabilistic reward learning can lead to powerful biases in visual attention and saccade control through subcortical pathways connecting visual areas with basal ganglia and superior colliculus. Time-resolved neuroimaging using electroencephalography or magnetoencephalography has begun to tackle the time course of these effects, and can now be complemented by neuroimaging and neurophysiology recordings in monkey. Summary: These findings have implications for understanding and assessing affective biases in perception and attention in patients with psychiatric disorders, such as phobias, depression, and addiction, but also open new avenues for rehabilitation in neurological patients with attention disorders. Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.
Kaufmann S.H.,Max Planck Institute for Infection Biology |
Hussey G.,University of Cape Town |
Lambert P.-H.,University Hospitals Geneva Medical Center
The Lancet | Year: 2010
New vaccines are urgently needed if we want to reach the goal of substantially reducing the incidence of tuberculosis by 2050. Despite a steady increase in funding over the past decade, there is still a striking financial shortfall for vaccine research and development for tuberculosis. Yet, around ten vaccine candidates have left the laboratory stage and entered clinical trials. These vaccines are either aimed at replacing the present vaccine, BCG, or at enhancing immunity induced by BCG. However, these pre-exposure candidates are designed for prevention of disease and will therefore neither eradicate the pathogen, nor prevent stable infection. Long-term vaccination strategies need to target these more ambitious goals. Even though vaccine development will have a price, the return of investment will greatly exceed original costs. © 2010 Elsevier Ltd. All rights reserved.
Cosson P.,University Hospitals Geneva Medical Center |
Perrin J.,University Hospitals Geneva Medical Center |
Bonifacino J.S.,U.S. National Institutes of Health
Trends in Cell Biology | Year: 2013
The transmembrane domains (TMDs) of integral membrane proteins have emerged as major determinants of intracellular localization and transport in the secretory and endocytic pathways. Unlike sorting signals in cytosolic domains, TMD sorting determinants are not conserved amino acid sequences but physical properties such as the length and hydrophilicity of the transmembrane span. The underlying sorting machinery is still poorly characterized, but several mechanisms have been proposed, including TMD recognition by transmembrane sorting receptors and partitioning into membrane lipid domains. Here we review the nature of TMD sorting determinants and how they may dictate transmembrane protein localization and transport. © 2013 Elsevier Ltd.
Dayer J.M.,University Hospitals Geneva Medical Center
Rheumatology (Oxford, England) | Year: 2010
RA is a chronic, debilitating disease in which articular inflammation and joint destruction are accompanied by systemic manifestations including anaemia, fatigue and osteoporosis. IL-6 is expressed abundantly in the SF of RA patients and is thought to mediate many of the local and systemic effects of this disease. Unlike a number of other cytokines, IL-6 can activate cells through both membrane-bound (IL-6R) and soluble receptors (sIL-6R), thus widening the number of cell types responsive to this cytokine. Indeed, trans-signalling, where IL-6 binds to the sIL-6R, homodimerizes with glycoprotein 130 subunits and induces signal transduction, has been found to play a key role in acute and chronic inflammation. Elevated levels of IL-6 and sIL-6R in the SF of RA patients can increase the risk of joint destruction and, at the joint level, IL-6/sIL-6R can stimulate pannus development through increased VEGF expression and increase bone resorption as a result of osteoclastogenesis. Systemic effects of IL-6, albeit through conventional or trans-signalling, include regulation of acute-phase protein synthesis, as well as hepcidin production and stimulation of the hypothalamo-pituitary-adrenal axis, the latter two actions potentially leading to anaemia and fatigue, respectively. This review aims to provide an insight into the biological effects of IL-6 in RA, examining how IL-6 can induce the articular and systemic effects of this disease.
Cvetkovic-Lopes V.,University Hospitals Geneva Medical Center
PloS one | Year: 2010
In a previous study we proposed that the depolarized state of the wake-promoting hypocretin/orexin (hcrt/orx) neurons was independent of synaptic inputs as it persisted in tetrodotoxin and low calcium/high magnesium solutions. Here we show first that these cells are hyperpolarized when external sodium is lowered, suggesting that non-selective cation channels (NSCCs) could be involved. As canonical transient receptor channels (TRPCs) are known to form NSCCs, we looked for TRPCs subunits using single-cell RT-PCR and found that TRPC6 mRNA was detectable in a small minority, TRPC1, TRPC3 and TRPC7 in a majority and TRPC4 and 5 in the vast majority (∼90%) of hcrt/orx neurons. Using intracellular applications of TRPC antibodies against subunits known to form NSCCs, we then found that only TRPC5 antibodies elicited an outward current, together with hyperpolarization and inhibition of the cells. These effects were blocked by co-application of a TRPC5 antigen peptide. Voltage-clamp ramps in the presence or absence of TRPC5 antibodies indicated the presence of a current with a reversal potential close to -15 mV. Application of the non-selective TRPC channel blocker, flufenamic acid, had a similar effect, which could be occluded in cells pre-loaded with TRPC5 antibodies. Finally, using the same TRPC5 antibodies we found that most hcrt/orx cells show immunostaining for the TRPC5 subunit. These results suggest that hcrt/orx neurons are endowed with a constitutively active non-selective cation current which depends on TRPC channels containing the TRPC5 subunit and which is responsible for the depolarized and active state of these cells.
Saurat J.-H.,University Hospitals Geneva Medical Center
Dermatology | Year: 2015
The sequence of events and mechanisms leading to the development of the primary acne lesion, the comedone, is revisited. Recent knowledge obtained both from lineage tracing experiments in the mouse and the pilosebaceous response to xenobiotics in humans provides robust models for further understanding key biological events at the cellular roots of comedogenesis. The focus is set on the LRIG1+ sebaceous stem cells in the isthmus of the pilosebaceous duct. The master switch that transforms a normally functioning sebaceous gland into a microcomedone and the hierarchy of factors involved in this process are reviewed. The key strategic target in acne care appears to be the naïve pilosebaceous follicle that is not involved yet in the acne cycle. The prevention of the comedone switch implies that the key switching factors are adequately controlled in the long term. © 2015 The Author(s) Published by S. Karger AG, Basel.
Ferrari P.,University Hospitals Geneva Medical Center |
Strubin M.,University Hospitals Geneva Medical Center
Nucleic Acids Research | Year: 2015
Transcription in eukaryotes is associated with two major changes in chromatin organization. Firstly, nucleosomal histones are continuously replaced by new histones, an event that in yeast occurs predominantly at transcriptionally active promoters. Secondly, histones become modified post-translationally at specific lysine residues. Some modifications, including histone H3 trimethylation at lysine 4 (H3K4me3) and acetylation at lysines 9 (H3K9ac) and 14 (H3K14ac), are specifically enriched at active promoters where histones exchange, suggesting a possible causal relationship. Other modifications accumulate within transcribed regions and one of them, H3K36me3, is thought to prevent histone exchange. Here we explored the relationship between these four H3 modifications and histone turnover at a few selected genes. Using lysine-to-arginine mutants and a histone exchange assay, we found that none of these modifications plays a major role in either promoting or preventing histone turnover. Unexpectedly, mutation of H3K56, whose acetylation occurs prior to chromatin incorporation, had an effect only when introduced into the nucleosomal histone. Furthermore, we used various genetic approaches to show that histone turnover can be experimentally altered with no major consequence on the H3 modifications tested. Together, these results suggest that transcription-associated histone turnover and H3 modification are two correlating but largely independent events. © 2015 © The Author(s) 2015. Published by Oxford University Press on behalf of Nucleic Acids Research.
Grimaldi Y.,University Hospitals Geneva Medical Center |
Ferrari P.,University Hospitals Geneva Medical Center |
Strubin M.,University Hospitals Geneva Medical Center
Genome Research | Year: 2014
Transcription by all three eukaryotic RNA polymerases involves the assembly of a large preinitiation complex (PIC) at gene promoters. The PIC comprises several general transcription factors (GTFs), including TBP, and the respective RNA polymerase. It has been suggested that some GTFs remain stably bound at active promoters to facilitate multiple transcription events. Here we used two complementary approaches to show that, in G1-arrested yeast cells, TBP exchanges very rapidly even at the most highly active RNA Pol II promoters. A similar situation is observed at RNA Pol III promoters. In contrast, TBP remains stably bound at RNA Pol I promoters. We also provide evidence that, unexpectedly, PIC dynamics are neither the cause nor the consequence of nucleosome exchange at most of the RNA Pol II promoters we analyzed. These results point to a stable reinitiation complex at RNA Pol I promoters and suggest independent PIC and nucleosome turnover at many RNA Pol II promoters. © 2014 Grimaldi et al.
Sallusto F.,University Hospitals Geneva Medical Center
Annual Review of Immunology | Year: 2016
CD4+ T helper (Th) cells play a central role in the adaptive immune response by providing help to B cells and cytotoxic T cells and by releasing different types of cytokines in tissues to mediate protection against a wide range of pathogenic microorganisms. These functions are performed by different types of Th cells endowed with distinct migratory capacities and effector functions. Here we discuss how studies of the human T cell response to microbes have advanced our understanding of Th cell functional heterogeneity, in particular with the discovery of a distinct Th1 subset involved in the response to Mycobacteria and the characterization of two types of Th17 cells specific for extracellular bacteria or fungi. We also review new approaches to dissect at the clonal level the human CD4+ T cell response induced by pathogens or vaccines that have revealed an unexpected degree of intraclonal diversification and propose a progressive and selective model of CD4+ T cell differentiation. Copyright © 2016 by Annual Reviews. All rights reserved.