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development and growth

Ming Li, Minghua Zhou, Jianmei Luo, Chaolin Tan, Xiaoyu Tian, Pei Su, Tingyue Gu
This study developed a bubbling-type photosynthetic algae microbial fuel cell (B-PAMFC) to treat synthetic wastewater and capture CO2 using Chlorella vulgaris with simultaneous power production. The performance of B-PAMFC in CO2 fixation and bioenergy production was compared with the photosynthetic algae microbial fuel cell (PAMFC) and bubbling photobioreactor. Different nitrogen sources for C. vulgaris growth, namely sodium nitrate, urea, ammonium acetate and acetamide were studied. The maximum CO2 fixation rate in B-PAMFC with 2...
February 7, 2019: Bioresource Technology
M Saulnier, C Corona, M Stoffel, F Guibal, J-L Edouard
A better understanding of the respective role of key climatic variables on tree growth is crucial for an accurate assessment of how ongoing global changes may affect both dynamics and distribution of forest tree species in the future. The aim of this study was (i) to explore growth patterns of European larch (Larix decidua Mill.) through a network of tree-ring chronologies developed for the French Alps and (ii) to identify the main climatic drivers explaining radial growth. Climate-growth relationships were coupled with a hierarchical analysis...
February 5, 2019: Science of the Total Environment
Yun Liu, Martha M Téllez-Rojo, Brisa N Sánchez, Zhenzhen Zhang, Myriam C Afeiche, Adrianna Mercado-García, Howard Hu, John D Meeker, Karen E Peterson
BACKGROUND: Previous studies have examined the association between blood lead levels and pubertal timing in adolescent girls; however, the evidence is lacking on the role of lead exposure during sensitive developmental periods on sexual maturation. OBJECTIVES: To examine the association of prenatal and early childhood lead exposure with pubertal stages among 264 boys and 283 girls aged 9.8-18.0 years in Mexico City. METHODS: We measured maternal bone lead (a proxy for cumulative fetal exposure to lead from maternal bone stores mobilized during pregnancy) at 1 month postpartum...
February 11, 2019: Environment International
Tobias A Mattei, Carlos R Goulart, Shawn S Rai, Azeem A Rehman, Michelle Williams, Ehud Mendel
BACKGROUND: Previous studies have described the association of spinal epidural lipomatosis with several conditions including chronic steroid therapy, Cushing's syndrome, obesity, Paget's disease, and hypothyroidism. We present a report of rapid development of spinal epidural lipomatosis after treatment with second-generation anti-androgen therapy, a new strategy for treatment of metastatic castration-resistant prostate cancer which has been increasingly employed in the past few years...
February 11, 2019: World Neurosurgery
Mercedes Tomé, Jan Tchorz, Martin Gassmann, Bernhard Bettler
Notch signalling regulates neural stem cell (NSC) proliferation, differentiation and survival for the correct development and functioning of the central nervous system. Overactive Notch2 signalling has been associated with poor prognosis of aggressive brain tumours, such as glioblastoma multiforme (GBM). We recently reported that constitutive expression of the Notch2 intracellular domain (N2ICD) enhances proliferation and gliogenesis in NSCs. Here, we investigated the mechanism by which Notch2 promotes resistance to apoptosis of NSCs to cytotoxic insults...
February 7, 2019: Stem Cell Research
Zengkai Zhang, Yujun Chen, Bojiang Li, Yilong Yao, Aiwen Jiang, Wei Wei, Honglin Liu, Wangjun Wu
MicroRNAs (miRNAs) are endogenous short non-coding RNAs and exert their function by targeting mRNAs of genes. miRNA-206 (miR-206) is exclusively expressed in adult skeletal muscles and plays an important role in myogenesis. However, the regulatory mechanisms of miR-206 in myoblasts proliferation and differentiation are still limited. In this study, we validated that Notch3 is a direct target gene of mouse miR-206 using dual-luciferase reporter assay and miR-206-overexpressed experiments. Furthermore, we demonstrated that the negative effect of overexpression of miR-206 and knockdown of Notch3 on C2C12 cells proliferation, and found that the effect was produced by controlling the transition of G0/G1 and S phase in C2C12 cell cycle...
February 11, 2019: Gene
Susan L Baldwin, Sasha E Larsen, Diane Ordway, Gail Cassell, Rhea N Coler
Seemingly innocuous nontuberculous mycobacteria (NTM) species, classified by their slow or rapid growth rates, can cause a wide range of illnesses, from skin ulceration to severe pulmonary and disseminated disease. Despite their worldwide prevalence and significant disease burden, NTM do not garner the same financial or research focus as Mycobacterium tuberculosis. In this review, we outline the most abundant of over 170 NTM species and inadequacies of diagnostics and treatments and weigh the advantages and disadvantages of currently available in vivo animal models of NTM...
February 2019: PLoS Neglected Tropical Diseases
Nobuhiro Mori, Kenji Kanenishi, Mohamed Ahmed Mostafa AboEllail, Emiko Nitta, Toshiyuki Hata
Objective To assess whether neurological maturation and development are accelerated in fetal growth restriction (FGR) in utero using four-dimensional (4D) ultrasound. Methods The facial expressions of 50 appropriate-for-gestational-age (AGA) and 34 FGR fetuses aged between 28 and 35 gestational weeks were assessed using 4D ultrasound. Subsequently, they were differentiated into two gestational age groups (19 aged 28-31 weeks and 31 aged 32-35 weeks in AGA, and 15 aged 28-31 weeks and 19 aged 32-35 weeks in FGR)...
February 14, 2019: Journal of Perinatal Medicine
Theerthankar Das, Huai-Jin Choong, Yee Chin Kwang, Hak-Kim Chan, Jim Manos, Philip Chi Lip Kwok, Hien T T Duong
Antibiotic resistance in pathogenic bacteria has emerged as a big challenge to human and animal health and significant economy loss worldwide. Development of novel strategies to tackle antibiotic resistance is of the utmost priority. In this study, we combined glutathione (GSH), a master antioxidant in all mammalian cells, and nitric oxide, a proven biofilm-dispersing agent, to produce GSNO. Resazurin biofilm viability assay, crystal violet biofilm assay, and confocal microscopy techniques showed that GSNO disrupted biofilms of both P...
February 14, 2019: Molecular Pharmaceutics
Jacob R Jokisaari, Canhui Wang, Qiao Qiao, Xuan Hu, David A Reed, Reiner Bleher, Xianghong Luan, Robert F Klie, Thomas G H Diekwisch
Tooth enamel is a hard yet resilient biomaterial that derives its unique mechanical properties from decussating bundles of apatite crystals. To understand enamel crystal nucleation and growth at a nanoscale level and to minimize preparation artifacts, the developing mouse enamel matrix was imaged in situ using graphene liquid cells and atomic resolution scanning transmission electron and cryo-fracture electron microscopy. We report that 1-2nm diameter mineral precipitates aggregated to form larger 5nm particle assemblies within ameloblast secretory vesicles or annular organic matrix subunits...
February 14, 2019: ACS Nano
Brian P Jenssen, Karen M Wilson
PURPOSE OF REVIEW: Electronic cigarettes (e-cigarettes) and other vaping devices have seen extraordinary growth in use in the past 10 years, and companies are accelerating their development of new products and marketing efforts. In turn, researchers have increased their efforts to determine how e-cigarettes affect health, how marketing these products impacts adolescents and how the use of e-cigarettes may affect adolescents' use of other tobacco products. Products like Juul were not on the market 2 years ago; thus, frequent updates on the topic are essential...
February 11, 2019: Current Opinion in Pediatrics
Joel Lim, Alexandra Oschman, Kayla Curiel
PURPOSE OF REVIEW: The current review provides a summary of available lipid products and discusses current literature and the limitations to the use of various lipid products for treatment and prevention of intestinal failure-associated liver disease (IFALD) in pediatric patients dependent on parenteral nutrition. RECENT FINDINGS: Improvements in markers of cholestasis and liver function have been seen with minimizing soybean lipid, fish oil lipid, and mixed fish oil-containing lipid emulsions...
February 11, 2019: Current Opinion in Organ Transplantation
J Plaisancié, F Ceroni, R Holt, C Zazo Seco, P Calvas, N Chassaing, Nicola K Ragge
Eye formation is the result of coordinated induction and differentiation processes during embryogenesis. Disruption of any one of these events has the potential to cause ocular growth and structural defects, such as anophthalmia and microphthalmia (A/M). A/M can be isolated or occur with systemic anomalies, when they may form part of a recognizable syndrome. Their etiology includes genetic and environmental factors; several hundred genes involved in ocular development have been identified in humans or animal models...
February 14, 2019: Human Genetics
Doaa M Mokhtar, Manal T Hussein, Marwa M Hussein, Enas A Abd-Elhafez, Gamal Kamel
This study investigated the histomorphological features of developing rabbit respiratory acini during the postnatal period. On the 1st day of postnatal life, the epithelium of terminal bronchiole consisted of clear cells which intercalated between few ciliated and abundant non-ciliated (Clara) cells. At this age, the rabbit lung was in the alveolar stage. The terminal bronchioles branched into several alveolar ducts, which opened into atria that communicated to alveolar sacs. All primary and secondary inter-alveolar septa were thick and showed a double-capillary network (immature septa)...
February 14, 2019: Microscopy and Microanalysis
Xiaochen Shu, Yun Jiang, Tao Wen, Shun Lu, Lu Yao, Fang Meng
AIM: There is no consensus regarding the association between hormone replacement therapy (HRT) and risk of meningioma so far. We conducted the first study among Chinese female patients to investigate the influence of HRT use on the risk of meningioma. METHODS: We retrospectively collected records of diagnosis of meningioma for women aged 50 years and above during 2011-2016 and dispense of HRT prior to meningioma diagnosis in three tertiary hospitals in China. Meningioma cases were matched with controls at a ratio of 1:2 by using nearest neighbor propensity scores matching in order to balance the baseline characteristics between groups, which generated a total of 629 cases with 1258 controls...
February 13, 2019: Asia-Pacific Journal of Clinical Oncology
Yilin Tu, Taoran Qu, Fengshan Chen
Fibroblast growth factor (FGF) 23 is a member of the FGF family involved in bone development by interacting with FGFRs. In a previous study, we discovered a mutant human FGF (hFGF) 23 (A12D) in the mandibular prognathism (MP) pedigree. However, the exact role of hFGF23(A12D) during bone formation remains unclear. The aim of this study was to identify the function of hFGF23(A12D) in bone formation. We infected isolated rat calvaria (RC) cells with the recombinant lentivirus containing mutant hFGF23(A12D) and WT hFGF23 respectively...
February 13, 2019: Journal of Cellular and Molecular Medicine
Sarah E Burkhart, Roxanna J Llinas, Bonnie Bartel
Peroxisomes rely on peroxins (PEX proteins) for biogenesis, importing membrane and matrix proteins, and fission. PEX16, which is implicated in peroxisomal membrane protein targeting and forming nascent peroxisomes from the endoplasmic reticulum (ER), is unusual among peroxins because it is inserted co-translationally into the ER and localizes to both ER and peroxisomal membranes. PEX16 mutations in humans, yeast, and plants confer some common peroxisomal defects; however, apparent functional differences have impeded the development of a unified model for PEX16 action...
February 14, 2019: Journal of Integrative Plant Biology
Ursula Mirastschijski, Nilima Dinesh, Sudarson Baskaran, Dirk Wedekind, Jelena Gavrilovic, Megan Y Murray, Damon Bevan, Sørge Kelm
Matrix metalloproteinases (MMP) are a family of more than 25 zinc-dependent enzymes that are centrally involved in cellular migration, tissue remodelling, cancer invasion and metastasis. Besides degrading extracellular matrix proteins, MMPs are crucial for growth factor and cytokine release and activation. At the same time, they can inactivate inflammatory mediators and enzymes themselves through protein degradation. Subclasses of MMPs include collagenases, gelatinases, stromelysins, membrane-bound MMPs and others...
February 14, 2019: Wound Repair and Regeneration
Zahra Shabani Azandaryani, Nahid Davoodian, Afshin Samiei, Sahere Rouzbehan
There are numerous studies which provide support for the use of human adipose tissue-derived stem cells (hASCs) to generate hepatocyte-like cells. However, the produced cells exhibit only a certain level of differentiation, mainly due to inefficient induction conditions. Therefore, based on the important role of insulin-like growth factor (IGF-I) in hepatic function and development, in the current study we evaluated the differentiation efficacy of the mentioned factor to induce hASCs into functional hepatocyte-like cells...
February 13, 2019: Cell Biology International
Mariya M Mikhailova, Andrey A Panteleyev, Mikhail A Paltsev, Andrey A Panteleyev
It is a well-known fact, that there is a close interconnection between vascular and neural structures in both embryonic development and postnatal life. Different models have been employed to dissect the mechanisms of these interactions, ranging from in vitro systems (e.g., co-culture of neural and endothelial cells) to in vivo imaging of central neural system recovery in laboratory animals after artificially induced trauma. Nevertheless, most of these models have serious limitations. Here, we describe an ex vivo model, representing an organotypic co-culture of aortic fragments (AF) with longitudinal slices of mouse neonatal spinal cord (SC) or dorsal root ganglia (DRG)...
February 13, 2019: Cell Biology International
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