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https://www.readbyqxmd.com/read/28330118/cloning-expression-purification-and-characterization-of-lipase-from-bacillus-licheniformis-isolated-from-hot-spring-of-himachal-pradesh-india
#1
Gagandeep Kaur, Amninder Singh, Rohit Sharma, Vinay Sharma, Swati Verma, Pushpender K Sharma
In the present investigation, a gene encoding extracellular lipase was cloned from a Bacillus licheniformis. The recombinant protein containing His-tag was expressed as inclusion bodies in Esherichia coli BL21DE3 cells, using pET-23a as expression vector. Expressed protein purified from the inclusion bodies demonstrated ~22 kDa protein band on 12 % SDS-PAGE. It exhibited specific activity of 0.49 U mg(-1) and % yield of 8.58. Interestingly, the lipase displayed activity at wide range of pH and temperature, i...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329648/hormonal-and-reproductive-factors-and-incidence-of-basal-cell-carcinoma-in-a-population-based-cohort
#2
Catherine M Olsen, Nirmala Pandeya, Bridie S Thompson, Jean Claude Dusingize, Padmini Subramaniam, Christina M Nagle, Adele C Green, Rachel E Neale, Penny M Webb, David C Whitman
Estrogens have photosensitizing properties, but few prospective studies have examined the relationship between hormonal and reproductive factors and incidence of basal cell carcinoma (BCC) in women. Previous findings have been inconsistent, particularly in relation to parity and use of oral contraceptives (OCs) and menopausal hormone therapy (MHT). Given the heterogeneity in the literature, we sought to examine the association between hormonal and reproductive factors and BCC risk in a cohort of women (n=23,879) enrolled in the QSkin Study in 2011...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329630/body-mass-index-height-and-early-onset-basal-cell-carcinoma-in-a-case-control-study
#3
Yanchang Zhang, Brenda Cartmel, Courtney C Choy, Annette M Molinaro, David J Leffell, Allen E Bale, Susan T Mayne, Leah M Ferucci
BackgroundBasal cell carcinoma (BCC) is the most common malignancy in the US. Body mass index (BMI) and height have been associated with a variety of cancer types, yet the evidence regarding BCC is limited. Therefore, we evaluated BMI and height in relation to early- onset BCC and explored the potential role of ultraviolet (UV) radiation exposure as well as estrogen-related exposures in the BMI-BCC relationship.MethodsBCC cases (n=377) diagnosed under age 40 were identified through a central dermatopathology facility in Connecticut...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329628/attitudes-and-predictors-of-sunless-tanning-in-a-sample-of-young-adults
#4
Chelsea Anderson, Brenda Cartmel, Susan T Mayne, Leah M Ferrucci
Given the popularity of a tan appearance, sunless tanning may play a role in skin cancer prevention as a substitute for ultraviolet (UV) tanning. Few studies have comprehensively assessed attitudes toward sunless tanning or predictors of use.Demographic, phenotypic, and lifestyle characteristics were ascertained during in-person interviews of 385 non-Hispanic whites (<age 40) who were controls in a case-control study of early-onset basal cell carcinoma. Attitudes toward sunless tanning were queried via self- administered questionnaire...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329594/perforating-gout-of-the-ear
#5
Leigh Sutton, Palak Parekh
Gout is the most common cause of inflammatory arthritis in men over 40 [1]. The prevalence of gout in the US is approximately 3.9%. Tophus is a characteristic sign of gout and results when monosodium urate deposits at the joint, skin, or cartilage. Tophi develop in 12-35% of patients who are diagnosed with gout [2]. We report a case of a 70-year-old man who was diagnosed with squamous cell carcinoma of the helix via shave biopsy. During Mohs micrographic surgery, a vigorous foreign-body reaction was noted. Review of the initial biopsy slides identified crystals with pseudoepitheliomatous hyperplasia (PEH) rendering a diagnosis of gout...
October 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329592/giant-subungual-glomus-tumor-clinical-dermoscopy-imagiologic-and-surgery-details
#6
Ana Filipa Duarte, Osvaldo Correia, Hugo Barreiros, Eckart Haneke
Glomus tumor is a rare benign vascular hamartoma derived from the modified smooth muscle cells of the glomus body. Paroxysmal pain is the leading symptom. A 78-year-old woman presented at our clinic with a 50-year history of a slow growing painful purple blue tender nodule under the right fourth finger nail. Dermoscopy and magnetic ressonance confirmed the presence of a large subungual tumor and total surgical excision was performed after partial nail plate avulsion. Histologic examination confirmed a glomus tumor...
October 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329437/phenolic-fractions-from-muscadine-grape-noble-pomace-can-inhibit-breast-cancer-cell-mda-mb-231-better-than-those-from-european-grape-cabernet-sauvignon-and-induce-s-phase-arrest-and-apoptosis
#7
Jianming Luo, Zheng Wei, Shengyu Zhang, Xichun Peng, Yu Huang, Yali Zhang, Jiang Lu
Tons of grape pomace which still contained a rich amount of plant polyphenols, is discarded after winemaking. Plant polyphenols have multi-functional activities for human body. In this study, polyphenols of pomaces from Muscadinia rotundifolia "Noble" and Vitis vinifera "Cabernet Sauvignon" were extracted and fractionated, and then they were analyzed with LC-MS and the inhibitory effects on breast cancer cells were compared. The inhibition on MDA-MB-231 cells of fractions from "Noble" was further evaluated...
March 22, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28329379/the-lysis-of-pathogenic-escherichia-coli-by-bacteriophages-releases-less-endotoxin-than-betalactams
#8
Nicolas Dufour, Raphaëlle Delattre, Jean-Damien Ricard, Laurent Debarbieux
Background: Beside numerous experimental data assessing phage therapy efficacy, questions regarding safety of this approach are not sufficiently addressed. In particular, as phages can kill bacterial cells within less than 10 minutes, the associated endotoxin release (ER) in severe infections caused by Gram-negative bacteria could be a matter of concern. Methods: Two therapeutic virulent phages and four reference antibiotics were studied in vitro for their ability to kill two pathogenic strains of Escherichia coli and generate an ER...
March 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28329361/sex-hormones-affect-outcome-in-arrhythmogenic-right-ventricular-cardiomyopathy-dysplasia-from-a-stem-cell-derived-cardiomyocyte-based-model-to-clinical-biomarkers-of-disease-outcome
#9
Deniz Akdis, Ardan M Saguner, Khooshbu Shah, Chuanyu Wei, Argelia Medeiros-Domingo, Arnold von Eckardstein, Thomas F Lüscher, Corinna Brunckhorst, H S Vincent Chen, Firat Duru
Aims: Arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is characterized by fibrofatty infiltration of the myocardium and ventricular arrhythmias that may lead to sudden cardiac death. It has been observed that male patients develop the disease earlier and present with more severe phenotypes as compared to females. Thus, we hypothesized that serum levels of sex hormones may contribute to major arrhythmic cardiovascular events (MACE) in patients with ARVC/D. Methods and results: The serum levels of five sex hormones, sex hormone-binding globulin, high sensitivity troponin T, pro-brain natriuretic peptide, cholesterol, triglycerides, insulin, and glucose were measured in 54 ARVC/D patients (72% male)...
February 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329220/prolonged-exposures-to-intermittent-hypoxia-promote-visceral-white-adipose-tissue-inflammation-in-a-murine-model-of-severe-sleep-apnea-effect-of-normoxic-recovery
#10
Alex Gileles-Hillel, Isaac Almendros, Abdelnaby Khalyfa, Recep Nigdelioglu, Zhuanhong Qiao, Robert B Hamanaka, Gökhan M Mutlu, Mahzad Akbarpour, David Gozal
Study Objectives: Increased visceral white adipose tissue (vWAT) mass results in infiltration of inflammatory macrophages that drive inflammation and insulin resistance. Patients with obstructive sleep apnea (OSA) suffer from increased prevalence of obesity, insulin resistance and metabolic syndrome. Murine models of intermittent hypoxia (IH) mimicking moderate-severe OSA manifest insulin resistance following short-term IH. We examined in mice the effect of long-term IH on the inflammatory cellular changes within vWAT, and the potential effect of normoxic recovery (IH-R)...
December 22, 2016: Sleep
https://www.readbyqxmd.com/read/28328744/non-canonical-roles-of-grks-in-cardiovascular-signaling
#11
Sarah M Schumacher, Walter J Koch
G protein-coupled receptor kinases (GRKs) are classically known for their role in regulating the activity of the largest known class of membrane receptors, which influence diverse biological processes in every cell type in the human body. As researchers have tried to uncover how this family of kinases, containing only 7 members, achieves selective and coordinated control of receptors, they have uncovered a growing number of non-canonical activities for these kinases. These activities include phosphorylation of non-receptor targets and kinase-independent molecular interactions...
March 17, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28328551/higher-body-mass-index-is-associated-with-greater-proportions-of-effector-cd8-t-cells-expressing-cd57-in-women-living-with-hiv
#12
Michael J A Reid, Sanjiv M Baxi, Lila A Sheira, Alan L Landay, Edward A Frongillo, Adebola Adedimeji, Mardge H Cohen, Eryka Wentz, Deborah R Gustafson, Daniel Merenstein, Peter W Hunt, Phyllis C Tien, Sheri D Weiser
BACKGROUND: A low proportion of CD28-CD8+ T cells that express CD57 is associated with increased mortality in HIV infection. The effect of increasing BMI changes in the proportion of CD57+CD28-CD8+ T cells among HIV-infected individuals on ART is unknown. SETTING: In a U.S. cohort of HIV-infected women, we evaluated associations of BMI and waist circumference with 3 distinct CD8+ T cell phenotypes: % CD28-CD57+CD8+ T cells, % CD57+ of CD28-CD8+ T cells and % CD28- of all CD8 T cells...
March 20, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28328180/effect-of-estrogen-on-chick-primordial-follicle-development-and-activation
#13
Dan Zhao, Caifeng Lv, Guang Liu, Yuling Mi, Caiqiao Zhang
Steroid hormones and their receptors play pivotal roles in avian reproduction and development. 17β-estradiol (E2 ) is an essential mediator in ovarian development. In this study, Day 3 (D3) chicks were injected with E2 (0.025, 0.25 or 2.5 mg/kg body weight) for 4 days to assess the effects of estrogen on avian follicle development. Morphological analysis showed that treatment of E2 at 2.5 mg/kg increased the number of growing follicles by 28. 5% and activated follicles by 8.9%, compared with the group. Treatment of E2 also led to increased diameter and area of three kinds of follicles and oocytes, respectively...
March 22, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28328100/smart-mechanosensing-machineries-enable-migration-of-vascular-smooth-muscle-cells-in-atherosclerosis-relevant-3d-matrices
#14
REVIEW
Qingjia Chi, Jieling Shan, Xiaorong Ding, Tieying Yin, Yazhou Wang, Dongyu Jia, Guixue Wang
At the early stage of atherosclerosis, neointima is formed due to the migration of vascular smooth muscle cells (VSMCs) from the media to the intima. VSMCs are surrounded by highly adhesive 3D matrices. They take specific strategies to cross various 3D matrices in the media, including heterogeneous collagen and mechanically-strong basement membrane. Migration of VSMCs is potentially caused by biomechanical mechanism. Most in vitro studies focus on cell migration on 2D substrates in response to biochemical factors...
March 22, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28328083/oral-iron-supplementation-potential-implications-for-the-gut-microbiome-and-metabolome-in-patients-with-ckd
#15
Guus A M Kortman, Dorien Reijnders, Dorine W Swinkels
Patients with chronic kidney disease (CKD) and loss of kidney function are at increased risk for morbidity and mortality. The risks of CKD are attributed to "uremia," an increased concentration of uremic retention solutes (toxins) in the plasma. Recently, a colo-renal axis became clearly apparent and uremia has been associated with an altered gut microbiome composition and metabolism. There is a high prevalence of anemia in patients with CKD, for which patients are often treated with oral or intravenous iron...
March 22, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28327660/quantitative-volumetric-raman-imaging-of-three-dimensional-cell-cultures
#16
Charalambos Kallepitis, Mads S Bergholt, Manuel M Mazo, Vincent Leonardo, Stacey C Skaalure, Stephanie A Maynard, Molly M Stevens
The ability to simultaneously image multiple biomolecules in biologically relevant three-dimensional (3D) cell culture environments would contribute greatly to the understanding of complex cellular mechanisms and cell-material interactions. Here, we present a computational framework for label-free quantitative volumetric Raman imaging (qVRI). We apply qVRI to a selection of biological systems: human pluripotent stem cells with their cardiac derivatives, monocytes and monocyte-derived macrophages in conventional cell culture systems and mesenchymal stem cells inside biomimetic hydrogels that supplied a 3D cell culture environment...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327528/anti-obesity-effect-of-bombus-ignitus-queen-glycosaminoglycans-in-rats-on-a-high-fat-diet
#17
Mi Young Ahn, Ban Ji Kim, Ha Jeong Kim, Hyung Joo Yoon, Sang Duck Jee, Jae Sam Hwang, Kun-Koo Park
The mechanism of functional insect glycosaminoglycan (GAG) on obesity caused a high fat diet has not yet been elucidated. Therefore, insect glycosaminoglycans derived from Isaria sinclairii, Bombus ignitus (a type of bumblebee) queen, and Gryllus bimaculatus were purified and investigated as a potential functional food. 14-week old male Wistar rats were fed a high-fat diet (HFD) for 6 weeks. There were five groups that received daily intraperitoneal administration of phosphate buffered saline (PBS, control), GbG (GAG from Gryllus bimaculatus) 10 mg/kg, ISG (GAG from Isaria sinclairii) 10 mg/kg, IQG (GAG from Bombus ignites) 10 mg/kg, or Pravastatin (2 mg/kg)...
March 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28327460/comprehensive-proteomic-characterization-of-stem-cell-derived-extracellular-matrices
#18
Héloïse Ragelle, Alexandra Naba, Benjamin L Larson, Fangheng Zhou, Miralem Prijić, Charles A Whittaker, Amanda Del Rosario, Robert Langer, Richard O Hynes, Daniel G Anderson
In the stem-cell niche, the extracellular matrix (ECM) serves as a structural support that additionally provides stem cells with signals that contribute to the regulation of stem-cell function, via reciprocal interactions between cells and components of the ECM. Recently, cell-derived ECMs have emerged as in vitro cell culture substrates to better recapitulate the native stem-cell microenvironment outside the body. Significant changes in cell number, morphology and function have been observed when mesenchymal stem cells (MSC) were cultured on ECM substrates as compared to standard tissue-culture polystyrene (TCPS)...
March 7, 2017: Biomaterials
https://www.readbyqxmd.com/read/28327410/mitochondria-control-acute-and-chronic-responses-to-hypoxia
#19
G S McElroy, N S Chandel
There are numerous mechanisms by which mammals respond to hypoxia. These include acute changes in pulmonary arterial tone due to smooth muscle cell contraction, acute increases in respiration triggered by the carotid body chemosensory cells, and chronic changes such as induction of red blood cell proliferation and angiogenesis by hypoxia inducible factor targets erythropoietin and vascular endothelial growth factor, respectively. Mitochondria account for the majority of oxygen consumption in the cell and have recently been appreciated to serve as signaling organelles required for the initiation or propagation of numerous homeostatic mechanisms...
March 19, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28327343/astilbin-from-engelhardtia-chrysolepis-enhances-intestinal-barrier-functions-in-caco-2-cell-monolayers
#20
Tatsuo Nakahara, Yosuke Nishitani, Shin Nishiumi, Masaru Yoshida, Takeshi Azuma
Astilbin, which is one of polyphenolic compounds isolated from the leaves of Engelhardtia chrysolepis HANCE (Chinese name, huang-qui), is available as the effective component in food and cosmetics because of its anti-oxidant and anti-inflammatory effects. The tight junction (TJ) proteins, which protect the body from foreign substances, are related to adhesion between a cell and a cell. Previously, the enhancement of TJ's functions induced by aglycones of flavonoids has been demonstrated, but the effects of the glycosides such as astilbin have not been observed yet...
March 18, 2017: European Journal of Pharmacology
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