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Saliva biology

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https://www.readbyqxmd.com/read/28535443/independent-validation-of-body-fluid-specific-cpg-markers-and-construction-of-a-robust-multiplex-assay
#1
Hannah Holtkötter, Vanessa Beyer, Kristina Schwender, Alina Glaub, Kristina Schulze Johann, Marianne Schürenkamp, Ursula Sibbing, Sabrina Banken, Peter Wiegand, Heidi Pfeiffer, Lynn Dennany, Marielle Vennemann, Marielle Vennemann
Potential forensic use of tissue-specific DNA methylation markers has recently been discussed for the identification of the biological source of a stain. In this study 13 promising markers were evaluated to identify suitable candidate markers for the development of a robust and reliable multiplex assay. The results of this study suggest that a combination of only four highly informative markers will be enough for clear body fluid identification. A multiplex assay was developed for the identification of menstrual blood, saliva, semen, and venous blood...
May 9, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28530599/a-saliva-molecular-imprinted-localized-surface-plasmon-resonance-biosensor-for-wine-astringency-estimation
#2
J Rafaela L Guerreiro, Natércia Teixeira, Victor De Freitas, M Goreti F Sales, Duncan S Sutherland
Wine astringency was evaluated based on the interaction of two complex matrices (red wine and saliva) by combining localized surface plasmon resonance (LSPR) and molecular imprinted polymers (MIP) at gold nanodisks as an alternative to sensorial analysis. The main objective of the work was to simulate wine astringency inside the mouth by mimicking this biological system. The LSPR/MIP sensor provided a linear response for astringency expressed in pentagalloyl glucose (PGG) units in concentrations ranging from 1 to 140μmol/L...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28526030/prenatal-bisphenol-a-exposure-and-dysregulation-of-infant-hypothalamic-pituitary-adrenal-axis-function-findings-from-the-apron-cohort-study
#3
Gerald F Giesbrecht, Maede Ejaredar, Jiaying Liu, Jenna Thomas, Nicole Letourneau, Tavis Campbell, Jonathan W Martin, Deborah Dewey
BACKGROUND: Animal models show that prenatal bisphenol A (BPA) exposure leads to sexually dimorphic disruption of the neuroendocrine system in offspring, including the hypothalamic-pituitary-adrenal (HPA) neuroendocrine system, but human data are lacking. In humans, prenatal BPA exposure is associated with sex-specific behavioural problems in children, and HPA axis dysregulation may be a biological mechanism. The objective of the current study was to examine sex differences in associations between prenatal maternal urinary BPA concentration and HPA axis function in 3 month old infants...
May 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28523996/micro-rnas-exercise-and-cellular-plasticity-in-humans-the-impact-of-dietary-factors-and-hypoxia
#4
Timothée Watier, Anthony Mj Sanchez
Physical exercise is a stress that modulates a plethora of cellular mechanisms to promote morphological and metabolic adaptations. Substantial efforts have been made to better understand the modulation of pathways involved in cell plasticity during exercise, but human explorations may be limited because invasive procedures are often required. In recent years, minimally invasive methods for the analysis of microRNAs (miRNAs) modulation in response to exercise have been developed. miRNAs are small molecules that belong to a family of non-coding RNAs...
May 19, 2017: MicroRNA
https://www.readbyqxmd.com/read/28521528/prevention-and-control-of-emergent-infectious-disease-with-high-specific-antigen-sensor
#5
Hongzhe Zhang, Shanshan Zhang, Nan Liu
This study aims to evaluate the application of a new type of high specificity antigen sensor in detecting the viruses in sudden infectious diseases. Influenza A (H1N1) virus immunosensor was used for the respective determination of the six kinds of antigens of H1N1, H3N2 viral protein, HA protein of H7N9, influenza B virus, adenovirus, and EV71 virus of same dilution degree on the Screen Printed Carbon Electrode (SPCE), so as to test the specificity of the detection method. In addition, various batches of chick embryo allantoic saliva dilution simulation samples were also detected on their recovery (accuracy), repeatability (precision), and stability...
May 18, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28515295/natural-variation-of-epstein-barr-virus-genes-proteins-and-pri-mirna-revised
#6
Samantha Correia, Anne Palser, Claudio Elgueta Karstegl, Jaap M Middeldorp, Octavia Ramayanti, Jeffrey I Cohen, Allan Hildesheim, Maria Dolores Fellner, Joelle Wiels, Robert E White, Paul Kellam, Paul J Farrell
Viral gene sequences from an enlarged set of about 200 Epstein-Barr virus (EBV) strains including many primary isolates have been used to investigate variation in key viral genetic regions, particularly LMP1, Zp, gp350, EBNA1 and the BART miRNA cluster 2. Determination of type 1 and type 2 EBV in saliva samples from people from a wide range of geographic and ethnic backgrounds demonstrates a small percentage of healthy white Caucasian British people carrying predominantly type 2 EBV. Linkage of Zp and gp350 variants to type 2 EBV is likely to be due to their genes being adjacent to the EBNA3 locus, which is one of the major determinants of the type 1/type 2 distinction...
May 17, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28511094/isolation-and-genetic-analysis-of-pure-cells-from-forensic-biological-mixtures-the-precision-of-a-digital-approach
#7
F Fontana, C Rapone, G Bregola, R Aversa, A de Meo, G Signorini, M Sergio, A Ferrarini, R Lanzellotto, G Medoro, G Giorgini, N Manaresi, A Berti
Latest genotyping technologies allow to achieve a reliable genetic profile for the offender identification even from extremely minute biological evidence. The ultimate challenge occurs when genetic profiles need to be retrieved from a mixture, which is composed of biological material from two or more individuals. In this case, DNA profiling will often result in a complex genetic profile, which is then subject matter for statistical analysis. In principle, when more individuals contribute to a mixture with different biological fluids, their single genetic profiles can be obtained by separating the distinct cell types (e...
May 1, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28506800/behaviour-of-silver-nanoparticles-in-simulated-saliva-and-gastrointestinal-fluids
#8
Lucie Pinďáková, Věra Kašpárková, Kristina Kejlová, Markéta Dvořáková, Daniel Krsek, Dagmar Jírová, Lucie Kašparová
Continuously increasing application of silver nanoparticles (AgNPs) requires information on their safety and performance under biological conditions. Assessment of AgNPs in biological systems is also related to availability of robust toxicological methods for evaluation of toxic potential of AgNPs and information on their physicochemical state. Silver nanoparticles were subjected to action of simulated saliva, gastric and intestinal fluids, appropriately supplemented with digestive enzymes pepsin or pancreatin...
May 12, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28504589/analysis-of-saliva-gene-expression-during-head-and-neck-cancer-radiotherapy-a-pilot-study
#9
Jerome Lacombe, Carla Brooks, Chengcheng Hu, Emmanuel Menashi, Ronald Korn, Farley Yang, Frederic Zenhausern
Saliva, a biological fluid, is a promising candidate for novel approaches to prognosis, clinical diagnosis, monitoring and management of patients with both oral and systemic diseases. However, to date, saliva has not been widely investigated as a biomarker for radiation exposure. Since white blood cells are also present in saliva, it should theoretically be possible to investigate the transcriptional biomarkers of radiation exposure classically studied in whole blood. Therefore, we collected whole blood and saliva samples from eight head and neck cancer patients before the start of radiation treatment, at mid-treatment and after treatment...
May 15, 2017: Radiation Research
https://www.readbyqxmd.com/read/28501160/bioaffinity-based-assay-for-the-sensitive-detection-and-discrimination-of-sweat-aimed-at-forensic-applications
#10
Crystal Huynh, Erica Brunelle, Juliana Agudelo, Jan Halámek
Sweat is a well-known piece of biological evidence that is actually used much less than expected. Biological samples are important because their components can often provide some type of information about a person-of-interest. Sweat, in particular, is important because of its DNA content which can be extracted and analyzed to provide information that can be imperative to a criminal investigation. While it is a very important source of forensic information, the methods for detection and discrimination of sweat are limited, causing it to be overlooked during evidence collection...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28498527/adolescent-conflict-appraisals-moderate-the-link-between-marital-conflict-and-physiological-stress-reactivity
#11
Rachel G Lucas-Thompson, Erika S Lunkenheimer, Douglas A Granger
The goal of this study was to advance understanding of how adolescent conflict appraisals contribute uniquely, and in combination with interparental conflict behavior, to individual differences in adolescent physiological reactivity. Saliva samples were collected from 153 adolescents (52% female; ages 10-17 years) before and after the Trier Social Stress Test. Saliva was assayed for cortisol and alpha-amylase. Results revealed interactive effects between marital conflict and conflict appraisals. For youth who appraised parental conflict negatively (particularly as threatening), negative marital conflict predicted dampened reactivity; for youth who appraised parental conflict less negatively, negative marital conflict predicted heightened reactivity...
March 2017: Journal of Research on Adolescence: the Official Journal of the Society for Research on Adolescence
https://www.readbyqxmd.com/read/28492756/a-longitudinal-study-of-early-childhood-caries-and-associated-factors-in-brazilian-children
#12
Fabiane Piva, Joanna Tatith Pereira, Patrícia Blaya Luz, Lina Naomi Hashizume, Fernando Neves Hugo, Fernando Borba de Araujo
Early childhood caries (ECC) affects children all over the world and has high prevalence and severity in preschool children. Different social, biological and behavioral factors compose a network of causal factors for ECC. The aim was to evaluate the association between socioeconomic variables and caries at baseline, and the presence of Streptococcus mutans and Lactobacillus spp. microorganisms with the progression of caries lesions after two years of follow-up in a group of children. At baseline, 163 children (3-4 years old) living in the areas of 12 primary care services of the Hospital Group Conceição (GHC, Porto Alegre, RS, Brazil) were evaluated...
March 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28469780/the-relationship-between-amniotic-fluid-mirnas-and-congenital-obstructive-nephropathy
#13
Juntao Xie, Yi Zhou, Wenzong Gao, Zuoqing Li, Zhe Xu, Li Zhou
Exosomes are small membrane vesicles with size of 30-100 nm, which were found in bodily fluids including amniotic fluid and saliva. The biological materials in exosomes, such as proteins and RNA, can be used as novel potential biomarkers for diagnostic assays. The purpose of this study was to assess whether exosomal microRNAs (miRNAs) could be used as biomarkers to prenatally diagnose congenital hydronephrosis and to evaluate fetal kidney function. Transmission electron microscopy (TEM), flow cytometry (FACS), and western-blot were applied to identify exosomes in the amniotic fluid from fetuses with congenital hydronephrosis and healthy controls...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28467356/akr1c1-as-a-biomarker-for-differentiating-the-biological-effects-of-combustible-from-non-combustible-tobacco-products
#14
Sangsoon Woo, Hong Gao, David Henderson, Wolfgang Zacharias, Gang Liu, Quynh T Tran, G L Prasad
Smoking has been established as a major risk factor for developing oral squamous cell carcinoma (OSCC), but less attention has been paid to the effects of smokeless tobacco products. Our objective is to identify potential biomarkers to distinguish the biological effects of combustible tobacco products from those of non-combustible ones using oral cell lines. Normal human gingival epithelial cells (HGEC), non-metastatic (101A) and metastatic (101B) OSCC cell lines were exposed to different tobacco product preparations (TPPs) including cigarette smoke total particulate matter (TPM), whole-smoke conditioned media (WS-CM), smokeless tobacco extract in complete artificial saliva (STE), or nicotine (NIC) alone...
May 3, 2017: Genes
https://www.readbyqxmd.com/read/28461264/development-of-nanostructured-lipid-carriers-for-intraoral-delivery-of-domperidone
#15
Carolin Tetyczka, Martin Griesbacher, Markus Absenger-Novak, Eleonore Fröhlich, Eva Roblegg
The oral cavity displays one potentially attractive route that is not associated with gastric transit and hepatic first pass metabolism. However, poorly soluble active candidates require a drug delivery system to facilitate their transport through oral biological membranes. To this end, nanostructured lipid carriers (NLC) were loaded with Domperidone and produced with high pressure homogenization. NLC were characterized regarding particle size, particle size distribution, zeta potential, entrapment efficiency and crystallinity...
April 29, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28454800/rationale-and-design-of-family-based-approach-in-a-minority-community-integrating-systems-biology-for-promotion-of-health-familia
#16
Sameer Bansilal, Rajesh Vedanthan, Jason C Kovacic, Ana Victoria Soto, Jacqueline Latina, Johan L M Björkegren, Risa Jaslow, Maribel Santana, Samantha Sartori, Chiara Giannarelli, Venkatesh Mani, Roger Hajjar, Eric Schadt, Andrew Kasarskis, Zahi A Fayad, Valentin Fuster
BACKGROUND: The 2020 American Heart Association Impact Goal aims to improve cardiovascular health of all Americans by 20% while reducing deaths from cardiovascular disease and stroke by 20%. A large step toward this goal would be to better understand and take advantage of the significant intersection between behavior and biology across the entire life-span. In the proposed FAMILIA studies, we aim to directly address this major knowledge and clinical health gap by implementing an integrated family-centric health promotion intervention and focusing on the intersection of environment and behavior, while understanding the genetic and biologic basis of cardiovascular disease...
May 2017: American Heart Journal
https://www.readbyqxmd.com/read/28444531/multifaceted-sexual-desire-and-hormonal-associations-accounting-for-social-location-relationship-status-and-desire-target
#17
Sara B Chadwick, Shannon M Burke, Katherine L Goldey, Sari M van Anders
Sexual desire is typically measured as a unitary erotic phenomenon and is often assumed by biological and biomedical researchers, as well as the lay public, to be directly connected to physiological parameters like testosterone (T). In the present study, we empirically examined how conceptualizing sexual desire as multifaceted might clarify associations with T and contextual variables. To do so, we used the Sexual Desire Questionnaire (DESQ), which assesses multifaceted dyadic sexual desire, to explore how contextual variables such as social location, relationship status, and desire target (e...
April 25, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/28444055/prospects-of-studies-on-violence-adolescence-and-cortisol-a-systematic-literature-review
#18
Leonardo Planel Lugarinho, Joviana Quintes Avanci, Liana Wernersbach Pinto
Violence has a negative impact on adolescents and affects their quality of life. It causes stress and requires the victim's adaptive capacity, which can cause psychological and biological changes. Hormone cortisol levels have been used as stress biomarker in several studies. This paper aims to perform a systematic literature review of publications on cortisol and violence involving teenagers from 2000 to 2013. Descriptors "cortisol", "violence" and "adolescent" were used in both English and Portuguese in this review, which included bibliographic databases PubMed/Medline, Lilacs, BVS and SciELO...
April 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28441039/high-throughput-processing-to-preserve-viable-cells-a-precision-medicine-initiative-cohort-program-workshop
#19
Rebekah S Rasooly, Daniel R Gossett, Marianne K Henderson, Allison Hubel, Stephen N Thibodeau
Conventionally, biobanks supporting clinical research studies have preserved serum, plasma, urine, saliva, a variety of tissue types, and stool. With the emergence of increasingly sophisticated technologies for analyzing single cells, there is growing interest in preserving viable blood cells for future functional studies. The new All of Us Research Program (formerly the Precision Medicine Initiative Cohort Program) biobank plans to house samples from a million or more individuals as part of a cohort with rich phenotypic data and longitudinal follow-up ( www...
April 25, 2017: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/28435894/oral-bacterial-acid-base-metabolism-in-caries-screening-a-proof-of-concept-study
#20
E Morou-Bermudez, M A Loza-Herrero, V Garcia-Rivas, E Suarez-Perez, R J Billings
The objective of this cross-sectional study was to clinically validate an array of biochemical tests for oral acid/alkali generation as caries screening instruments. 185 adult subjects (mean 33.6±10.6 years) were examined clinically for dental caries using the ICDAS criteria. Bitewing radiographs were used to confirm interproximal surfaces of posterior teeth. For the purposes of this study, subjects were classified as "caries-active" if they had at least one untreated caries lesion with ICDAS 4 or higher. Pooled supragingival plaque and unstimulated saliva samples were collected and assayed for pH changes from sucrose and urea metabolism using colorimetric tests...
April 2017: JDR Clinical and Translational Research
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