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probiotics in HIV

Warren Chanda, Thomson P Joseph, Wendong Wang, Arshad A Padhiar, Mintao Zhong
Candida albicans is a minor component of the oral microbiota and an opportunistic pathogen that takes advantage of the immunocompromised host and causes oral mucositis and oral candidiasis. This organism is able to undergo phenotypic modification from a yeast to hyphae growth phase, one of the key arsenals for immune cell evasion, tissue invasion and biofilm formation. The latter property coupled with overgrowth and immune compromising factors such as HIV/AIDS, cancer treatments, organ transplantation, diabetes, corticosteroid use, dentures, and broad-spectrum antibiotic use have modified the fungus from a normal component of the microflora to a foe of an oral cavity and resulting in reduced sensitivity towards commonly utilised antifungal agents...
September 2017: Medical Hypotheses
Fernando Notario-Pérez, Roberto Ruiz-Caro, María-Dolores Veiga-Ochoa
Infection with human immunodeficiency virus (HIV) remains a global public health concern and is particularly serious in low- and middle-income countries. Widespread sexual violence and poverty, among other factors, increase the risk of infection in women, while currently available prevention methods are outside the control of most. This has driven the study of vaginal microbicides to prevent sexual transmission of HIV from men to women in recent decades. The first microbicides evaluated were formulated as gels for daily use and contained different substances such as surfactants, acidifiers and monoclonal antibodies, which failed to demonstrate efficacy in clinical trials...
2017: Drug Design, Development and Therapy
Chiara D'Angelo, Marcella Reale, Erica Costantini
Microbiota play a key role in various body functions, as well as in physiological, metabolic, and immunological processes, through different mechanisms such as the regulation of the development and/or functions of different types of immune cells in the intestines. Evidence indicates that alteration in the gut microbiota can influence infectious and non-infectious diseases. Bacteria that reside on the mucosal surface or within the mucus layer interact with the host immune system, thus, a healthy gut microbiota is essential for the development of mucosal immunity...
June 16, 2017: Nutrients
Tomislav Preveden, Emidio Scarpellini, Natasa Milić, Francesco Luzza, Ludovico Abenavoli
Hepatitis C virus (HCV) infection is a global health problem with 150 million infected people worldwide. Liver can be greatly affected by changes in gut microbiota due to increased intestinal permeability with passage of microbial antigens into the liver through the portal circulation. The concept of 'gut-liver' axis is important to understand the pathophysiology of several liver diseases. Several recent studies also revealed that an altered gut microbiota can be implicated in the pathogenesis of HCV-induced chronic liver disease (CHC)...
June 23, 2017: Expert Review of Gastroenterology & Hepatology
Giuseppe Corano Scheri, Saeid Najafi Fard, Ivan Schietroma, Andrea Mastrangelo, Claudia Pinacchio, Noemi Giustini, Sara Serafino, Gabriella De Girolamo, Eugenio Nelson Cavallari, Maura Statzu, Luca Laghi, Annamaria Vullo, Giancarlo Ceccarelli, Vincenzo Vullo, Gabriella d'Ettorre
BACKGROUND: To date, no data are available regarding the effects of probiotics on the pathway of tryptophan/serotonin metabolism among human immunodeficiency virus (HIV) 1-infected individuals. Because a condition of dysbiosis might be responsible for the altered use of tryptophan described in this population, the aim of this study was to investigate the link between probiotic supplementation and serotonin levels in combined antiretroviral therapy-treated patients and the subsistence of an interplay with inflammation...
2017: International Journal of Tryptophan Research: IJTR
Gabriella d'Ettorre, Giacomo Rossi, Carolina Scagnolari, Mauro Andreotti, Noemi Giustini, Sara Serafino, Ivan Schietroma, Giuseppe Corano Scheri, Saeid Najafi Fard, Vito Trinchieri, Paola Mastromarino, Carla Selvaggi, Silvia Scarpona, Gianfranco Fanello, Fausto Fiocca, Giancarlo Ceccarelli, Guido Antonelli, Jason M Brenchley, Vincenzo Vullo
INTRODUCTION: HIV infection is characterized by a persistent immune activation associated to a compromised gut barrier immunity and alterations in the profile of the fecal flora linked with the progression of inflammatory symptoms. The effects of high concentration multistrain probiotic (Vivomixx®, Viale del Policlinico 155, Rome, Italy in EU; Visbiome®, Dupont, Madison, Wisconsin in USA) on several aspects of intestinal immunity in ART-experienced HIV-1 patients was evaluated. METHODS: A sub-study of a longitudinal pilot study was performed in HIV-1 patients who received the probiotic supplement twice a day for 6 months (T6)...
April 20, 2017: Immunity, Inflammation and Disease
Manuel G Feria, Natalia A Taborda, Juan C Hernandez, María T Rugeles
HIV infection induces alterations in almost all immune cell populations, mainly in CD4+ T cells, leading to the development of opportunistic infections. The gut-associated lymphoid tissue (GALT) constitutes the most important site for viral replication, because the main target cells, memory T-cells, reside in this tissue. It is currently known that alterations in GALT are critical during the course of the infection, as HIV-1 induces loss of tissue integrity and promotes translocation of microbial products from the intestinal lumen to the systemic circulation, leading to a persistent immune activation state and immune exhaustion...
February 2017: Revista Médica de Chile
Brian P Ciampa, Emmanuel Reyes Ramos, Marie Borum, David B Doman
In addition to drugs approved by the US Food and Drug Administration (FDA) that treat, cure, or mitigate disease, medical foods are a tool to help manage chronic conditions and diseases. A medical food, according to the FDA, is a food that is developed to be eaten or administered enterally under the guidance of a physician and that is meant for the specific dietary management of a condition or disease for which distinctive nutritional requirements, based upon known scientific principles, are established by medical evaluation...
February 2017: Gastroenterology & Hepatology
Judit Villar-García, Robert Güerri-Fernández, Andrés Moya, Alicia González, Juan J Hernández, Elisabet Lerma, Ana Guelar, Luisa Sorli, Juan P Horcajada, Alejandro Artacho, Giuseppe D Auria, Hernando Knobel
Dysbalance in gut microbiota has been linked to increased microbial translocation, leading to chronic inflammation in HIV-patients, even under effective HAART. Moreover, microbial translocation is associated with insufficient reconstitution of CD4+T cells, and contributes to the pathogenesis of immunologic non-response. In a double-blind, randomised, placebo-controlled trial, we recently showed that, compared to placebo, 12 weeks treatment with probiotic Saccharomyces boulardii significantly reduced plasma levels of bacterial translocation (Lipopolysaccharide-binding protein or LBP) and systemic inflammation (IL-6) in 44 HIV virologically suppressed patients, half of whom (n = 22) had immunologic non-response to antiretroviral therapy (<270 CD4+Tcells/μL despite long-term suppressed viral load)...
2017: PloS One
Anna-Ursula Happel, Shameem Z Jaumdally, Tanya Pidwell, Tracy Cornelius, Heather B Jaspan, Remy Froissart, Shaun L Barnabas, Jo-Ann S Passmore
BACKGROUND: Probiotics are widely used to improve gastrointestinal (GI) health, but they may also be useful to prevent or treat gynaecological disorders, including bacterial vaginosis (BV) and candidiasis. BV prevalence is high in South Africa and is associated with increased HIV risk and pregnancy complications. We aimed to assess the availability of probiotics for vaginal health in retail stores (pharmacies, supermarkets and health stores) in two major cities in South Africa. METHODS: A two-stage cluster sampling strategy was used in the Durban and Cape Town metropoles...
January 19, 2017: BMC Women's Health
Carolina Scagnolari, Giuseppe Corano Scheri, Carla Selvaggi, Ivan Schietroma, Saeid Najafi Fard, Andrea Mastrangelo, Noemi Giustini, Sara Serafino, Claudia Pinacchio, Paolo Pavone, Gianfranco Fanello, Giancarlo Ceccarelli, Vincenzo Vullo, Gabriella d'Ettorre
Recently the tryptophan pathway has been considered an important determinant of HIV-1 infected patients' quality of life, due to the toxic effects of its metabolites on the central nervous system (CNS). Since the dysbiosis described in HIV-1 patients might be responsible for the microbial translocation, the chronic immune activation, and the altered utilization of tryptophan observed in these individuals, we speculated a correlation between high levels of immune activation markers in the cerebrospinal fluid (CSF) of HIV-1 infected patients and the over-expression of indolamine-2,3-dioxygenase (IDO) at the gut mucosal surface...
September 27, 2016: International Journal of Molecular Sciences
Connie J Kim, Sharon L Walmsley, Janet M Raboud, Colin Kovacs, Bryan Coburn, Rodney Rousseau, Robert Reinhard, Ron Rosenes, Rupert Kaul
OBJECTIVES: Despite substantial improvements in HIV outcomes with combination antiretroviral therapy (cART), morbidity and mortality remain above population norms. The gut mucosal immune system is not completely restored by cART, and the resultant microbial translocation may contribute to chronic inflammation, inadequate CD4 T-cell recovery, and increased rates of serious non-AIDS events. Since the microbial environment surrounding a CD4 T cell may influence its development and function, we hypothesize that probiotics provided during cART might reduce inflammation and improve gut immune health in HIV-positive treatment-naïve individuals (PROOV IT I) and individuals with suboptimal CD4 recovery on cART (PROOV IT II)...
July 2016: HIV Clinical Trials
D L Moyes, D Saxena, M D John, D Malamud
Recent years have seen a massive expansion in our understanding of how we interact with our microbial colonists. The development of new, rapid sequencing techniques such as pyrosequencing and other next-generation sequencing systems have enabled us to begin to characterise the constituents of our diverse microbial communities, revealing the astonishing genetic richness that is our microbiome. Despite this, our ignorance of how these communities change over the course of an HIV infection is profound. Whilst some steps have been made to characterise the HIV microbiome at selected sites, these reports are still limited and much remains to be done...
April 2016: Oral Diseases
H Miller, R Ferris, B R Phelps
Probiotics are defined by the WHO as 'live microorganisms which when administered in adequate amounts confer a health benefit on the host'. Ongoing research has shown probiotics provide benefits to humans, including protection and restoration of the gastrointestinal and other mucosal tracts. As human immunodeficiency virus (HIV) activates gut-associated lymphoid tissue (GALT), several studies have investigated the effect of probiotics on CD4 cell count and related outcomes among those living with HIV. These studies are summarised here...
June 2016: Beneficial Microbes
Zenda Woodman
Bacterial vaginosis (BV) is the most common vaginal disorder affecting women of reproductive age and is associated with increased risk of sexually transmitted infections such as human immunodeficiency syndrome (HIV-1). Sub-Saharan Africa has the highest BV and HIV-1 burden and yet very few studies have focused on understanding the aetiology of BV and its association with HIV in this region. It has been suggested that we need to accurately diagnose and treat BV to lower the risk of HIV infection globally. However, effective diagnosis requires knowledge of what constitutes a "healthy" cervicovaginal microbiome and current studies indicate that Lactobacillus crispatus might not be the only commensal protective against BV: healthy women from different countries and ethnicities harbour alternative commensals...
March 11, 2016: Annals of Clinical Microbiology and Antimicrobials
Brett Williams, Alan Landay, Rachel M Presti
Recent developments in molecular techniques have allowed researchers to identify previously uncultured organisms, which has propelled a vast expansion of our knowledge regarding our commensal microbiota. Interest in the microbiome specific to HIV grew from earlier findings suggesting that bacterial translocation from the intestines is the cause of persistent immune activation despite effective viral suppression with antiretroviral therapy (ART). Studies of SIV infected primates have demonstrated that Proteobacteria preferentially translocate and that mucosal immunity can be restored with probiotics...
May 2016: Cellular Microbiology
Ivan Vujkovic-Cvijin, Louise A Swainson, Simon N Chu, Alexandra M Ortiz, Clark A Santee, Annalise Petriello, Richard M Dunham, Douglas W Fadrosh, Din L Lin, Ali A Faruqi, Yong Huang, Cristian Apetrei, Ivona Pandrea, Frederick M Hecht, Christopher D Pilcher, Nichole R Klatt, Jason M Brenchley, Susan V Lynch, Joseph M McCune
Gut microbes can profoundly modulate mucosal barrier-promoting Th17 cells in mammals. A salient feature of HIV/simian immunodeficiency virus (SIV) immunopathogenesis is the loss of Th17 cells, which has been linked to increased activity of the immunomodulatory enzyme, indoleamine 2,3-dioxygenase 1 (IDO 1). The role of gut microbes in this system remains unknown, and the SIV-infected rhesus macaque provides a well-described model for HIV-associated Th17 loss and mucosal immune disruption. We observed a specific depletion of gut-resident Lactobacillus during acute and chronic SIV infection of rhesus macaques, which was also seen in early HIV-infected humans...
November 24, 2015: Cell Reports
Linda V Thomas, Kaori Suzuki, Jia Zhao
This report summarises talks given at the 8th International Yakult Symposium, held on 23-24 April 2015 in Berlin. Two presentations explored different aspects of probiotic intervention: the small intestine as a probiotic target and inclusion of probiotics into integrative approaches to gastroenterology. Probiotic recommendations in gastroenterology guidelines and current data on probiotic efficacy in paediatric patients were reviewed. Updates were given on probiotic and gut microbiota research in obesity and obesity-related diseases, the gut-brain axis and development of psychobiotics, and the protective effects of equol-producing strains for prostate cancer...
December 2015: British Journal of Nutrition
Kazhila C Chinsembu
Challenges of resistance to synthetic antimicrobials have opened new vistas in the search for natural products. This article rigorously reviews plants and other natural products used in oral health: Punica granatum L. (pomegranate), Matricaria recutita L. (chamomile), Camellia sinensis (L.) Kuntze (green tea), chewing sticks made from Diospyros mespiliformis Hochst. ex A.D.C., Diospyros lycioides Desf., and Salvadora persica L. (miswak), honey and propolis from the manuka tree (Leptospermum scoparium J.R. Forst...
February 2016: Acta Tropica
Akinobu Kajikawa, Lin Zhang, Alora LaVoy, Sara Bumgardner, Todd R Klaenhammer, Gregg A Dean
Surface layer proteins of probiotic lactobacilli are theoretically efficient epitope-displaying scaffolds for oral vaccine delivery due to their high expression levels and surface localization. In this study, we constructed genetically modified Lactobacillus acidophilus strains expressing the membrane proximal external region (MPER) from human immunodeficiency virus type 1 (HIV-1) within the context of the major S-layer protein, SlpA. Intragastric immunization of mice with the recombinants induced MPER-specific and S-layer protein-specific antibodies in serum and mucosal secretions...
2015: PloS One
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