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Biological Research

Jie Qiu, Wenwei Zhang, Chuanshan Zang, Xiaomin Liu, Fuxue Liu, Ruifeng Ge, Yan Sun, Qingsheng Xia
OBJECTIVE: In this study, crucial genes and microRNAs (miRNAs) associated with the progression, staging, and prognosis of papillary thyroid cancer (PTC) were identified. METHODS: Four PTC datasets, including our own mRNA-sequencing (mRNA-seq) dataset and three public datasets downloaded from Gene Expression Omnibus and The Cancer Genome Atlas, were used to analyze differentially expressed genes (DEGs) and miRNAs (DEMs) between PTC tumor tissues and paired normal tissues (control)...
November 10, 2018: Biological Research
Bin Song, Juan Du, De-Feng Song, Ji-Chen Ren, Ye Feng
BACKGROUND: Emerging evidence indicate that miRNAs play an important role on gastric cancer (GC) progression via regulating several downstream targets, but it is still partially uncovered. This study aimed to explore the molecular mechanisms of GC by comprehensive analysis of mRNAs and miRNA expression profiles. METHODS: The mRNA and miRNA expression profiles of GSE79973 and GSE67354 downloaded from Gene Expression Omnibus were used to analyze the differentially expressed genes (DEGs) and DE-miRNAs among GC tissues and normal tissues...
November 3, 2018: Biological Research
Yongzhe Ren, Huifang Yue, Le Li, Yanhua Xu, Zhiqiang Wang, Zeyu Xin, Tongbao Lin
BACKGROUND: CircRNAs are widespread in plants and play important roles in response to abiotic stresses. Low nitrogen (LN) promotes the growth of plant root system, allowing it to explore more nitrogen. However, whether circRNAs involved in the response to LN stress and the regulation of LN-promoted root growth in wheat remains unclear. METHODS: Two wheat varieties (LH9 and XN979) with contrasting root phenotypes to LN stress were used as materials to identify circRNAs under control and LN conditions by using high-throughput sequencing technology...
November 3, 2018: Biological Research
Dong-Sik Chae, Chang Youn Lee, Jiyun Lee, Hyang-Hee Seo, Chong-Hyuk Choi, Seahyoung Lee, Ki-Chul Hwang
BACKGROUND: Osteoarthritis (OA) can be defined as degradation of articular cartilage of the joint, and is the most common degenerative disease. To regenerate the damaged cartilage, different experimental approaches including stem cell therapy have been tried. One of the major limitations of stem cell therapy is the poor post-transplantation survival of the stem cells. Anoikis, where insufficient matrix support and adhesion to extracellular matrix causes apoptotic cell death, is one of the main causes of the low post-transplantation survival rate of stem cells...
November 1, 2018: Biological Research
Rolando Garcia-Gonzales, José Pico-Mendoza, Karla Quiroz, Basilio Carrasco, Pablo Cáceres, Borys Chong-Perez, Hugo Pino, Marjorie Seiltgens, Eglis Greck, Peter D S Caligari
BACKGROUND: Polymorphic microsatellite markers were developed for Gaultheria pumila (Ericaceae) to evaluate genetic diversity and population structure within its native range in Chile. This is a very important Ericaceae endemic to Chile with a large commercial potential. Its resistance to different abiotic conditions makes it a valuable target for genetic improvement. RESULTS: Ten polymorphic simple sequence repeat (SSR) loci were isolated from Gaultheria pumila using new-generation 454 FLX Titanium pyrosequencing technology...
November 1, 2018: Biological Research
Ying Zhang, Jianjun Du, Jinglu Wang, Liming Ma, Xianju Lu, Xiaodi Pan, Xinyu Guo, Chunjiang Zhao
BACKGROUND: The biomechanical properties of maize stalks largely determine their lodging resistance, which affects crop yield per unit area. However, the quantitative and qualitative relationship between micro-phenotypes and the biomechanics of maize stalks is still under examined. In particular, the roles of the number, geometry, and distribution of vascular bundles of stalks in maize lodging resistance remain unclear. Research on these biomechanical properties will benefit from high-resolution micro-phenotypic image acquisition capabilities, which have been improved by modern X-ray imaging devices such as micro-CT and the development of micro-phenotyping analysis software...
October 27, 2018: Biological Research
Milu Wu, Baohua Fan, Qijing Guo, Yan Li, Rong Chen, Nannan Lv, Yinzhuo Diao, Yushuang Luo
BACKGROUND: SET domain bifurcated 1 (SETDB1) has been widely considered as an oncogene playing a critical role in many human cancers, including breast cancer. Nevertheless, the molecular mechanism by which SETDB1 regulates breast cancer tumorigenesis is still unknown. METHODS: qRT-PCR assay or western blot analysis was performed to assess the expression level of SETDB1 mRNA or protein, respectively. siSETDB1, pCMV6-XL5-SETDB1, miR-381-3p mimic, or miR-381-3p inhibitor was transfected into cells to regulate the expression of SETDB1 or miR-381-3p...
October 11, 2018: Biological Research
Eduardo A Sagredo, Alejandro Blanco, Alfredo I Sagredo, Paola Pérez, Gonzalo Sepúlveda-Hermosilla, Fernanda Morales, Bettina Müller, Ricardo Verdugo, Katherine Marcelain, Olivier Harismendy, Ricardo Armisén
BACKGROUND: Whole transcriptome RNA variant analyses have shown that adenosine deaminases acting on RNA (ADAR) enzymes modify a large proportion of cellular RNAs, contributing to transcriptome diversity and cancer evolution. Despite the advances in the understanding of ADAR function in breast cancer, ADAR RNA editing functional consequences are not fully addressed. RESULTS: We characterized A to G(I) mRNA editing in 81 breast cell lines, showing increased editing at 3'UTR and exonic regions in breast cancer cells compared to immortalized non-malignant cell lines...
October 5, 2018: Biological Research
Ma Ángeles Cabrera, Jenny M Blamey
To date, many industrial processes are performed using chemical compounds, which are harmful to nature. An alternative to overcome this problem is biocatalysis, which uses whole cells or enzymes to carry out chemical reactions in an environmentally friendly manner. Enzymes can be used as biocatalyst in food and feed, pharmaceutical, textile, detergent and beverage industries, among others. Since industrial processes require harsh reaction conditions to be performed, these enzymes must possess several characteristics that make them suitable for this purpose...
October 5, 2018: Biological Research
Jan Nevoral, Tereza Zalmanova, Kristyna Hoskova, Miriam Stiavnicka, Petr Hosek, Ales Petelak, Jaroslav Petr
BACKGROUND: Hydrogen sulfide has been shown to improve the quality of oocytes destined for in vitro fertilization. Although hydrogen sulfide is capable of modulating ion channel activity in somatic cells, the role of hydrogen sulfide in gametes and embryos remains unknown. Our observations confirmed the hypothesis that the KATP and L-type Ca2+ ion channels play roles in porcine oocyte ageing and revealed a plausible contribution of hydrogen sulfide to the modulation of ion channel activity...
October 5, 2018: Biological Research
Qiujian Yu, Huimin Liu, Shaoming Sang, Lulan Chen, Yingya Zhao, Yun Wang, Chunjiu Zhong
BACKGROUND: The previous studies have demonstrated the reduction of thiamine diphosphate is specific to Alzheimer's disease (AD) and causal factor of brain glucose hypometabolism, which is considered as a neurodegenerative index of AD and closely correlates with the degree of cognitive impairment. The reduction of thiamine diphosphate may contribute to the dysfunction of synapses and neural circuits, finally leading to cognitive decline. RESULTS: To demonstrate this hypothesis, we established abnormalities in the glucose metabolism utilizing thiamine deficiency in vitro and in vivo, and we found dramatically reduced dendrite spine density...
September 19, 2018: Biological Research
S Contreras-Duarte, P Chen, M Andía, S Uribe, P Irarrázaval, S Kopp, S Kern, G Marsche, D Busso, C Wadsack, A Rigotti
BACKGROUND AND AIMS: Atherosclerotic cardiovascular disease is highly prevalent and its underlying pathogenesis involves dyslipidemia including pro-atherogenic high density lipoprotein (HDL) remodeling. Vitamins C and E have been proposed as atheroprotective agents for cardiovascular disease management. However, their effects and benefits on high density lipoprotein function and remodeling are unknown. In this study, we evaluated the role of vitamin C and E on non HDL lipoproteins as well as HDL function and remodeling, along with their effects on inflammation/oxidation biomarkers and atherosclerosis in atherogenic diet-fed SR-B1 KO/ApoER61h/h mice...
September 15, 2018: Biological Research
Thais A Jacinto, Giselle S Meireles, Ananda T Dias, Rafaela Aires, Marcella L Porto, Agata L Gava, Elisardo C Vasquez, Thiago Melo C Pereira, Bianca P Campagnaro, Silvana S Meyrelles
BACKGROUND: New evidence demonstrates that aging and dyslipidemia are closely associated with oxidative stress, DNA damage and apoptosis in some cells and extravascular tissues. However, in monocytes, which are naturally involved in progression and/or resolution of plaque in atherosclerosis, this concurrence has not yet been fully investigated. In this study, we evaluated the influence of aging and hypercholesterolemia on serum pro-inflammatory cytokines, oxidative stress, DNA damage and apoptosis in monocytes from apolipoprotein E-deficient (apoE-/- ) mice compared with age-matched wild-type C57BL/6 (WT) mice...
September 5, 2018: Biological Research
Xiaoguang Zhu, Wenwen Li, Huicong Li
BACKGROUND: miR-214 was demonstrated to be upregulated in models of renal disease and promoted fibrosis in renal injury independent of TGF-β signaling in vivo. However, the detailed role of miR-214 in acute kidney injury (AKI) and its underlying mechanism are still largely unknown. METHODS: In this study, an I/R-induced rat AKI model and a hypoxia-induced NRK-52E cell model were used to study AKI. The concentrations of kidney injury markers serum creatinine, blood urea nitrogen, and kidney injury molecule-1 were measured...
September 4, 2018: Biological Research
Jintao Gao, Fangru Chen, Mingchun Hua, Junfan Guo, Yuejuan Nong, Qinyan Tang, Fengxia Zhong, Linxiu Qin
BACKGROUND: Psoriasis is a complex, chronic inflammatory skin disease with substantial negative effects on patient quality of life. Long non-coding RNAs (lncRNAs) are able to be involved in multitudes of cellular processes in diverse human diseases. This study aimed to investigate the potential involvement of lncRNA MIR31HG in HaCaT keratinocytes proliferation. RESULTS: The study showed that MIR31HG was significantly elevated in the lesional psoriatic skin compared with normal individuals' skin...
September 4, 2018: Biological Research
Nigel P Murray
Minimal residual disease is that not detected by conventional imaging studies and clinically the patient remains disease free. However, with time these dormant cells will awaken and disease progression occurs, resulting in clinically and radiological detectable metastatic disease. This review addresses the concept of tumor cell dissemination from the primary tumor, the micrometastatic niche and tumor cell survival and finally the clinical utility of detecting and characterizing these tumor cells in order to guide management decisions in treating patients with prostate cancer...
September 4, 2018: Biological Research
Diego Knop Henriques, Bárbara Guedes Costa Silva, Gustavo Emílio Zuñiga, Paulo Eduardo Aguiar Saraiva Câmara
BACKGROUND: With 29 Km2 , the Fildes Peninsula is the largest ice free area in King George Island and probably in Antarctica. The region is house of six permanent bases including the only airport in the South Shetlands, which led to impacts on its original landscape and vegetation. In recognition for the need to protect natural values, an Antarctic Specially Protected Area (ASPA 125) was established in the region. Focused mostly on protecting the fossils, the ASPA also plays a role in protecting the vegetation but so far, the management plan for the area does not contain a list of moss species present there...
August 30, 2018: Biological Research
Gabriela Poveda, Carlos Gil-Durán, Inmaculada Vaca, Gloria Levicán, Renato Chávez
BACKGROUND: Pectinase enzymes catalyze the breakdown of pectin, a key component of the plant cell wall. At industrial level, pectinases are used in diverse applications, especially in food-processing industry. Currently, most of the industrial pectinases have optimal activity at mesophilic temperatures. On the contrary, very little is known about the pectinolytic activities from organisms from cold climates such as Antarctica. In this work, 27 filamentous fungi isolated from marine sponges collected in King George Island, Antarctica, were screened as new source of cold-active pectinases...
August 27, 2018: Biological Research
Li Wei, Fei He, Wen Zhang, Wenhua Chen, Bo Yu
BACKGROUND: Diffuse intrinsic pontine glioma (DIPG) is the main cause of pediatric brain tumor death. This study was designed to identify key genes associated with DIPG. METHODS: The gene expression profile GSE50021, which consisted of 35 pediatric DIPG samples and 10 normal brain samples, was downloaded from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) were identified by limma package. Functional and pathway enrichment analyses were performed by the DAVID tool...
August 20, 2018: Biological Research
Bongkoch Turathum, Sittiruk Roytrakul, Chinarat Changsangfa, Morakot Sroyraya, Supita Tanasawet, Yindee Kitiyanant, Kulnasan Saikhun
BACKGROUND: The domestic cat serves as an animal model for assisted reproductive studies of endangered felid species. To date, there are no data on the protein alterations following cryopreservation of oocytes in felid family. METHODS: Immature (germinal vesicle) domestic cat oocytes were vitrified in the vitrification solution containing 35% ethylene glycol, 20% DMSO and 0.5 mM sucrose. The vitrified-warmed oocytes were matured (metaphase II) in vitro and subjected to proteomic analysis using 1DE SDS-PAGE prefractionation combined with LC-MS/MS...
August 20, 2018: Biological Research
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