keyword
MENU ▼
Read by QxMD icon Read
search

Human well being

keyword
https://www.readbyqxmd.com/read/28532113/nanofibers-of-human-tropoelastin-inspired-peptides-structural-characterization-and-biological-properties
#1
Valeria Secchi, Stefano Franchi, Marco Fioramonti, Giovanni Polzonetti, Giovanna Iucci, Brigida Bochicchio, Chiara Battocchio
Regenerative medicine is taking great advantage from the use of biomaterials in the treatments of a wide range of diseases and injuries. Among other biomaterials, self-assembling peptides are appealing systems due to their ability to spontaneously form nanostructured hydrogels that can be directly injected into lesions. Indeed, self-assembling peptide scaffolds are expected to behave as biomimetic matrices able to surround cells, to promote specific interactions, and to control and modify cell behavior by mimicking the native environment as well...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532089/a-poly-2-hydroxyethyl-methacrylate-based-resin-improves-the-dentin-remineralizing-ability-of-calcium-silicates
#2
Paola Taddei, Carlo Prati, Maria Giovanna Gandolfi
Bioactive polymeric composites have received great attention for their capability to remineralize the dentin tissue. This study was aimed at evaluating if a poly(HEMA-co-TEGDMA) resin (HEMA: 2-hydroxyethyl methacrylate; TEGDMA: triethyleneglycol dimethacrylate) may increase the in vitro apatite forming ability of a calcium silicate cement (CaSi), in view of developing a hydrophilic light-curable composite bio-remineralizing restorative material (R-CaSi). To this purpose, the following experiments were carried out: (1) In vitro apatite forming ability of R-CaSi and CaSi was comparatively assessed by micro-Raman spectroscopy after immersion of the cement disks in Dulbecco's Phosphate Buffered Saline (DPBS) at 37°C for 1-28days; (2) Previously demineralized human dentin slices were soaked for 7days in close contact with the CaSi and R-CaSi cements as well as poly(HEMA), poly(TEGDMA) and poly(HEMA-co-TEGDMA), and then were comparatively analyzed by IR spectroscopy...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532062/polylactide-and-polycaprolactone-based-substrates-enhance-angiogenic-potential-of-human-umbilical-cord-derived-mesenchymal-stem-cells-in-vitro-implications-for-cardiovascular-repair
#3
Małgorzata Sekuła, Patrycja Domalik-Pyzik, Anna Morawska-Chochół, Sylwia Bobis-Wozowicz, Elżbieta Karnas, Sylwia Noga, Dariusz Boruczkowski, Marta Adamiak, Zbigniew Madeja, Jan Chłopek, Ewa K Zuba-Surma
Recent approaches in tissue regeneration focus on combining innovative achievements of stem cell biology and biomaterial sciences to develop novel therapeutic strategies for patients. Growing recent evidence indicates that mesenchymal stem cells harvested from human umbilical cord Wharton's jelly (hUC-MSCs) are a new valuable source of cells for autologous as well as allogeneic therapies in humans. hUC-MSCs are multipotent, highly proliferating cells with prominent immunoregulatory activity. In this study, we evaluated the impact of widely used FDA approved poly(α-esters) including polylactide (PLA) and polycaprolactone (PCL) on selected biological properties of hUC-MSCs in vitro...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532011/molecularly-imprinted-polymer-for-human-viral-pathogen-detection
#4
REVIEW
Aijaz Ahmad Malik, Chanin Nantasenamat, Theeraphon Piacham
Molecular imprinting has become an attractive synthetic approach for the fabrication of novel functional polymers with pre-designed molecular target selectivity. Such molecularly imprinted polymers (MIPs) have been applied in wide range of areas such as chemical and biological sensors, solid phase extraction and drug assays owing to their inherent robustness, reusability and reproducibility. Furthermore, MIPs can also be used as tools for studies concerning antibody/receptor binding site mimicry as well as being used as antibody substitutes for biomedical applications...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531877/folate-n-acetyl-glucosamine-conjugated-mesoporous-silica-nanoparticles-for-targeting-breast-cancer-cells-a-comparative-study
#5
Pramod Kumar, Prajakta Tambe, Kishore M Paknikar, Virendra Gajbhiye
Folate receptors (FR) have been well recognized as a marker to target nano-sized carriers for cancer diagnosis and therapy. In contrast, influx transport systems (e.g. GLUT transporters) that transport essential amino acids and nutrients to cancer cells have not been exploited much for targeted delivery. In this study, folic acid- or n-acetyl glucosamine- functionalized mesoporous silica nanoparticles loaded with doxorubicin (DOX-FA-MSNPs or DOX-NAG-MSNPs) were prepared, characterized and compared for targeting along with cytotoxicity towards MCF-7 and MDA-MB-231 human breast cancer cells...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28531761/3%C3%AE-hydroxy-urs-12-en-28-oic-acid-confers-protection-against-znonps-induced-adversity-in-caenorhabditis-elegans
#6
Hema Negi, Shilpi Khare Saikia, Ranjana Kanaujia, Satish Jaiswal, Rakesh Pandey
Despite their well reported potent risk towards human health and environment Zinc oxide nanoparticles (ZnONPs) find an extensive commercial usage due to their antimicrobial properties. Here, we evaluated the efficacy of a natural triterpene ursolic acid (3β-hydroxy-urs-12-en-28-oic acid; UA) for overcoming the cytotoxic challenges of ZnONPs employing Ceanorhabditis elegans. The 24h LC50 of Zn-ONPs (<50nm TEM) was deduced as 4.75mgL(-1). UA (25μM) was observed to defend against this toxicity by attenuating Reactive Oxygen Species (ROS) resulting into better survival at 2mgL(-1) in a time dependent behavior...
May 8, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28531360/omega-3-polyunsaturated-fatty-acids-for-cardiovascular-diseases-present-past-and-future
#7
Yasuhiro Watanabe, Ichiro Tatsuno
Large-scale epidemiological studies on Greenlandic, Canadian and Alaskan Eskimos have examined the health benefits of omega-3 fatty acids consumed as part of the diet, and found statistically significant relative reduction in cardiovascular risk in people consuming omega-3 fatty acids. Areas covered: This article reviews studies on omega-3 fatty acids during the last 50 years, and identifies issues relevant to future studies on cardiovascular (CV) risk. Expert Commentary: Although a meta-analysis of large-scale prospective cohort studies and randomized studies reported that fish and fish oil consumption reduced coronary heart disease-related mortality and sudden cardiac death, omega-3 fatty acids have not yet been shown to be effective in secondary prevention trials on patients with multiple cardiovascular disease (CVD) risk factors...
May 20, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28531179/the-gingival-vein-as-a-minimally-traumatic-site-for-multiple-blood-sampling-in-guinea-pigs-and-hamsters
#8
Mariana Valotta Rodrigues, Simone Oliveira de Castro, Cynthia Zaccanini de Albuquerque, Vânia Gomes de Moura Mattaraia, Marcelo Larami Santoro
Laboratory animals are still necessary in scientific investigation and vaccine testing, but while novel methodological approaches are not available for their replacement, the search for new, humane, easy, and painless methods is necessary to diminish their stress and pain. When multiple blood samples are to be collected from hamsters and guinea pigs, the number of available venipuncture sites-which are greatly diminished in these species in comparison with other rodents due to the absence of a long tail-, harasses animal caregivers and researchers...
2017: PloS One
https://www.readbyqxmd.com/read/28531105/high-mobility-group-box-1-disrupts-metabolic-function-with-cigarette-smoke-exposure-in-a-ceramide-dependent-manner
#9
Oliver J Taylor, Mikayla O Thatcher, Sheryl T Carr, Jonathan L Gibbs, Annie M Trumbull, Mitchell E Harrison, Duane R Winden, Mackenzie J Pearson, Trevor S Tippetts, William L Holland, Paul R Reynolds, Benjamin T Bikman
We have previously found that cigarette smoke disrupts metabolic function, in part, by increasing muscle ceramide accrual. To further our understanding of this, we sought to determine the role of the cytokine high-mobility group box 1 (HMGB1), which is increased with smoke exposure, in smoke-induced muscle metabolic perturbations. To test this theory, we determined HMGB1 from lungs of human smokers, as well as from lung cells from mice exposed to cigarette smoke. We also treated cells and mice directly with HMGB1, in the presence or absence of myriocin, an inhibitor of serine palmitoyltransferase, the rate-limiting enzyme in ceramide biosynthesis...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28530733/photophysical-properties-singlet-oxygen-generation-efficiency-and-cytotoxic-effects-of-aloe-emodin-as-a-blue-light-photosensitizer-for-photodynamic-therapy-in-dermatological-treatment
#10
Lixin Zang, Huimin Zhao, Xueyu Ji, Wenwu Cao, Zhiguo Zhang, Peisong Meng
Conventional photodynamic therapy (PDT) uses red light for deeper penetration. A natural compound, aloe emodin (AE) with anticancer and photosensitising capabilities, excited by blue light, is proposed to treat superficial diseases. The photophysical properties and singlet oxygen quantum yield (ΦΔ) of AE, as well as the cytotoxic effects of AE on human cells, were investigated. The absorption and emission spectra of AE were analyzed. The ΦΔ of AE was measured by a relative method. In order to study the relationship between ΦΔ and the oxygen concentration, the dependence of ΦΔ on the oxygen concentration was investigated...
May 22, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28530494/review-anal-intraepithelial-neoplasia-in-hiv-infected-men-who-have-sex-with-men-is-screening-and-treatment-justified
#11
Peter Wasserman, David S Rubin, Glenn Turett
Anal squamous cell carcinoma (SCC) is the fourth most prevalent cancer in human immunodeficiency virus (HIV)-infected men who have sex with men (MSM). Human papillomavirus (HPV) has been detected in over 90% of anal carcinoma biopsy specimens from MSM, and is considered a necessary, but alone, insufficient factor for carcinogenesis. Anal intraepithelial neoplasia (AIN) may be precursive for SCC, and screening cytology with referral of persons with abnormality for high-resolution anoscopy-guided biopsy, and AIN treatment, has been recommended for prevention...
May 22, 2017: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/28530342/-behavioral-physiological-and-morphological-characteristics-associated-with-post-traumatic-response-to-continuous-exposure-versus-alternate-exposure-in-an-animal-model-of-post-traumatic-stress-disorder
#12
Ishay Ostfeld, Zeev Kaplan, Hagit Cohen
AIMS: The aim of this study was to approximate these conditions in an animal model of post-traumatic stress disorder (PTSD). More specifically, the neurobiological basis of these conditions, focusing on stress-related behavioral changes, HPA-axis and morphological were evaluated. The intention was to employ this well-validated, reproducible and reliable model for PTSD, to elicit data which will provide some guidance in the planning of a prospective study involving military personal. BACKGROUND: Combat personnel are exposed to significant stress and hardship, both physical and emotional, during their service and especially during active combat...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28530246/short-single-stranded-dna-degradation-products-augment-the-activation-of-toll-like-receptor-9
#13
Jelka Pohar, Duško Lainšček, Karolina Ivičak-Kocjan, Miša-Mojca Cajnko, Roman Jerala, Mojca Benčina
Toll-like receptors encounter a diversity of degradation products in endosomes. TLR7 and TLR8 have been shown to be activated by RNA degradation products. Here we show that although TLR9 requires single-stranded DNA longer than 20 nucleotides for a robust response, TLR9 activation is augmented by CpG-containing oligodeoxyribonucleotides (sODNs) as short as 2 nucleotides, which, by themselves, do not induce activation in cell cultures, as well as in mice. sODNs also activate human TLR9 in combination with ODNs containing a single CpG motif that by themselves do not activate human TLR9...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28530164/biocompatibility-of-intensified-decellularized-equine-carotid-arteries-in-a-rat-subcutaneous-implantation-model-and-in-a-human-in-vitro-model
#14
Niklas Jeinsen, Lavinia Maegel, Danny Jonigk, Melanie Klingenberg, Axel Haverich, Mathias Wilhelmi, Ulrike Böer
Limited biocompatibility of decellularized scaffolds is an ongoing challenge in tissue engineering. We recently demonstrated that intensified detergent-based decellularization of equine carotid artery (dEACintens) removed residual cellular molecules from the scaffold more efficiently than a conventional decellularization (dEACcon) though this approach did not eliminate its immunogenicity entirely. CCN1 has been shown to improve biocompatibility of dEACcon in a sheep model. Here, we tested the biocompatibility of dEACintens and dEACcon with or without CCN1-coating after subcutaneous implantation in rats for up to 12 weeks...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28529891/biomonitorization-of-iron-accumulation-in-the-substantia-nigra-from-lewy-body-disease-patients
#15
Belén Fernández, Isidro Ferrer, Fernando Gil, Sabine Hilfiker
Iron levels in the healthy human brain are known to be high in certain areas such as the substantia nigra (SN), and increase further with age. In addition, there is some evidence for a further increase in iron load in the SN of Parkinson's disease (PD) patients as compared to controls, which correlates with motor disability. Here, we have analyzed total iron levels in cells as well as mouse and human brain samples by atomic absorption spectroscopy (AAS). Our data indicate that iron load is more pronounced in cells with dopaminergic features...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/28529709/last-rolls-of-the-yoyo-assessing-the-human-canonical-protein-count
#16
REVIEW
Christopher Southan
In 2004, when the protein estimate from the finished human genome was only 24,000, the surprise was compounded as reviewed estimates fell to 19,000 by 2014. However, variability in the total canonical protein counts (i.e. excluding alternative splice forms) of open reading frames (ORFs) in different annotation portals persists. This work assesses these differences and possible causes. A 16-year analysis of Ensembl and UniProtKB/Swiss-Prot shows convergence to a protein number of ~20,000. The former had shown some yo-yoing, but both have now plateaued...
2017: F1000Research
https://www.readbyqxmd.com/read/28529542/frequency-and-geographic-distribution-of-tert-promoter-mutations-in-primary-hepatocellular-carcinoma
#17
REVIEW
Francesca Pezzuto, Luigi Buonaguro, Franco M Buonaguro, Maria Lina Tornesello
Primary hepatocellular carcinoma (HCC) mainly develops in subjects chronically infected with hepatitis B (HBV) and C (HCV) viruses through a multistep process characterized by the accumulation of genetic alterations in the human genome. Nucleotide changes in coding regions (i.e. TP53, CTNNB1, ARID1A and ARID2) as well as in non-coding regions (i.e. TERT promoter) are considered cancer drivers for HCC development with variable frequencies in different geographic regions depending on the etiology and environmental factors...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28529540/the-potential-role-of-infectious-agents-and-pelvic-inflammatory-disease-in-ovarian-carcinogenesis
#18
REVIEW
Kasper Ingerslev, Estrid Hogdall, Tine Henrichsen Schnack, Wojciech Skovrider-Ruminski, Claus Hogdall, Jan Blaakaer
BACKGROUND: The etiological cause of ovarian cancer is poorly understood. It has been theorized that bacterial or viral infection as well as pelvic inflammatory disease could play a role in ovarian carcinogenesis. AIM: To review the literature on studies examining the association between ovarian cancer and bacterial or viral infection or pelvic inflammatory disease. METHODS: Database search through MEDLINE, applying the medical subject headings: "Ovarian neoplasms", AND "Chlamydia infections", "Neisseria gonorrhoeae", "Mycoplasma genitalium", "Papillomaviridae", or "pelvic inflammatory disease"...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28529533/low-expression-of-cd39-and-cd73-genes-in-centenarians-compared-with-octogenarians
#19
Almudena Crooke, Juan Martínez-Henández, Joaquín Martínez-López, Alfonso Cruz-Jentoft, Fernando Huete-Toral, Jesús Pintor
Ageing involves a progressive decline of the body's regulatory systems including immune system. Adenosine regulates immune function by interaction with its receptors, mainly adenosine A2A receptor, present on the surface of immune cells. Furthermore, cellular response to this nucleoside is highly dependent on its extracellular concentration that is regulated by ecto-enzymes such as CD39 and CD73. Therefore, the aim of this study was to investigate the effect of age on adenosine A2A receptor, CD39 and CD73 gene expression...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28529488/endothelial-extracellular-vesicles-promises-and-challenges
#20
REVIEW
Carina Hromada, Severin Mühleder, Johannes Grillari, Heinz Redl, Wolfgang Holnthoner
Extracellular vesicles, including exosomes, microparticles, and apoptotic bodies, are phospholipid bilayer-enclosed vesicles that have once been considered as cell debris lacking biological functions. However, they have recently gained immense interest in the scientific community due to their role in intercellular communication, immunity, tissue regeneration as well as in the onset, and progression of various pathologic conditions. Extracellular vesicles of endothelial origin have been found to play a versatile role in the human body, since they are on the one hand known to contribute to cardiovascular diseases, but on the other hand have also been reported to promote endothelial cell survival...
2017: Frontiers in Physiology
keyword
keyword
41110
1
2
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"