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6 papers 0 to 25 followers
By Stéphane Boyer sss
https://www.readbyqxmd.com/read/26303432/in-vivo-repair-of-rat-transected-sciatic-nerve-by-low-intensity-pulsed-ultrasound-and-induced-pluripotent-stem-cells-derived-neural-crest-stem-cells
#1
Yonggang Lv, Panpan Nan, Guobao Chen, Yongqiang Sha, Bin Xia, Li Yang
OBJECTIVES: To evaluate the effects of the combination of low-intensity pulsed ultrasound (LIPUS) and induced pluripotent stem cells-derived neural crest stem cells (iPSCs-NCSCs) on the regeneration of rat transected sciatic nerve in vivo. RESULTS: Tissue-engineered tubular nerve conduit was fabricated by electrospinning aligned nanofibers in longitudinal direction. This sustained the iPSCs-NCSCs and could be used as a bridge in rat transected sciatic nerve. Treatment with 0...
December 2015: Biotechnology Letters
https://www.readbyqxmd.com/read/25954009/long-term-measles-induced-immunomodulation-increases-overall-childhood-infectious-disease-mortality
#2
Michael J Mina, C Jessica E Metcalf, Rik L de Swart, A D M E Osterhaus, Bryan T Grenfell
Immunosuppression after measles is known to predispose people to opportunistic infections for a period of several weeks to months. Using population-level data, we show that measles has a more prolonged effect on host resistance, extending over 2 to 3 years. We find that nonmeasles infectious disease mortality in high-income countries is tightly coupled to measles incidence at this lag, in both the pre- and post-vaccine eras. We conclude that long-term immunologic sequelae of measles drive interannual fluctuations in nonmeasles deaths...
May 8, 2015: Science
https://www.readbyqxmd.com/read/25954011/optogenetics-engineering-of-a-light-gated-potassium-channel
#3
Cristian Cosentino, Laura Alberio, Sabrina Gazzarrini, Marco Aquila, Edoardo Romano, Solei Cermenati, Paolo Zuccolini, Jan Petersen, Monica Beltrame, James L Van Etten, John M Christie, Gerhard Thiel, Anna Moroni
The present palette of opsin-based optogenetic tools lacks a light-gated potassium (K(+)) channel desirable for silencing of excitable cells. Here, we describe the construction of a blue-light-induced K(+) channel 1 (BLINK1) engineered by fusing the plant LOV2-Jα photosensory module to the small viral K(+) channel Kcv. BLINK1 exhibits biophysical features of Kcv, including K(+) selectivity and high single-channel conductance but reversibly photoactivates in blue light. Opening of BLINK1 channels hyperpolarizes the cell to the K(+) equilibrium potential...
May 8, 2015: Science
https://www.readbyqxmd.com/read/25954014/soil-science-soil-and-human-security-in-the-21st-century
#4
REVIEW
Ronald Amundson, Asmeret Asefaw Berhe, Jan W Hopmans, Carolyn Olson, A Ester Sztein, Donald L Sparks
Human security has and will continue to rely on Earth's diverse soil resources. Yet we have now exploited the planet's most productive soils. Soil erosion greatly exceeds rates of production in many agricultural regions. Nitrogen produced by fossil fuel and geological reservoirs of other fertilizers are headed toward possible scarcity, increased cost, and/or geopolitical conflict. Climate change is accelerating the microbial release of greenhouse gases from soil organic matter and will likely play a large role in our near-term climate future...
May 8, 2015: Science
https://www.readbyqxmd.com/read/25954012/malaria-a-forward-genetic-screen-identifies-erythrocyte-cd55-as-essential-for-plasmodium-falciparum-invasion
#5
Elizabeth S Egan, Rays H Y Jiang, Mischka A Moechtar, Natasha S Barteneva, Michael P Weekes, Luis V Nobre, Steven P Gygi, Joao A Paulo, Charles Frantzreb, Yoshihiko Tani, Junko Takahashi, Seishi Watanabe, Jonathan Goldberg, Aditya S Paul, Carlo Brugnara, David E Root, Roger C Wiegand, John G Doench, Manoj T Duraisingh
Efforts to identify host determinants for malaria have been hindered by the absence of a nucleus in erythrocytes, which precludes genetic manipulation in the cell in which the parasite replicates. We used cultured red blood cells derived from hematopoietic stem cells to carry out a forward genetic screen for Plasmodium falciparum host determinants. We found that CD55 is an essential host factor for P. falciparum invasion. CD55-null erythrocytes were refractory to invasion by all isolates of P. falciparum because parasites failed to attach properly to the erythrocyte surface...
May 8, 2015: Science
https://www.readbyqxmd.com/read/25840108/a-wnt5a-signaling-pathway-in-the-pathogenesis-of-hiv-1-gp120-induced-pain
#6
Su-Bo Yuan, Guangchen Ji, Bei Li, Tommy Andersson, Volker Neugebauer, Shao-Jun Tang
Pathological pain is one of the most common neurological complications in patients with HIV-1/AIDS. However, the pathogenic process is unclear. Our recent studies show that Wnt5a is upregulated in the spinal cord dorsal horn (SDH) of the patients with HIV who develop pain and that HIV-1 gp120, a potential causal factor of the HIV-associated pain, rapidly upregulates Wnt5a in the mouse SDH. Using a mouse model, we show here that a specific Wnt5a antagonist, Box-5, attenuated gp120-induced mechanical allodynia...
July 2015: Pain
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