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141.
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143.
Peripheral blood lymphocytes (PBL) from guinea pigs with experimental allergic encephalomyelitis (EAE) induced by sensitization with bovine whole white matter, proliferated in vitro upon exposure to bovine myelin basic protein (B-MBP). The degree of the response increased with clinical severity. PBL from EAE-sensitized guinea pigs which failed to develop clinical disease did not respond to B-MBP. PBL from complete Freund's adjuvant-sensitized and nonsensitized normal guinea pigs were not responsive to B-MBP. EAE-sensitized animals displaying clinical signs of disease showed concanavalin A (Con A) responsiveness which paralleled that of B-MBP. Animals that did not develop EAE demonstrated Con A responses similar to those of control guinea pigs. Thus, in this acute autoimmune demyelinating condition, PBL responsiveness to B-MBP might provide a monitor of disease development. 相似文献
144.
Amaury Farce Cedric Loge Sebastien Gallet Nicolas Lebegue Pascal Carato 《Journal of enzyme inhibition and medicinal chemistry》2013,28(6):541-547
Cancer is a major cause of mortality in developed countries, following only cardiovascular diseases. Death of cancerous cells can be achieved by stopping mitosis and the antimitotic class of drugs formed by the spindle poisons can be used for this purpose. Their role is to disorganize the mitotic spindle by targeting its main constituent, the microtubules, themselves made of heterodimers of α and β-tubulin. They disrupt the dynamics of the microtubules either by stabilizing them, as do paclitaxel or epothilones, or destabilizing them, as do colchicine. The binding site of colchicine seems to lie between the two units of the tubulin dimer. Here, we report on the characterization of this site by the docking of a series of reference compounds, and the subsequent docking of ligands prepared in our laboratory. 相似文献
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147.
Bérard S Bergeron A Chauve C Paul C 《IEEE/ACM transactions on computational biology and bioinformatics / IEEE, ACM》2007,4(1):4-16
We propose new algorithms for computing pairwise rearrangement scenarios that conserve the combinatorial structure of genomes. More precisely, we investigate the problem of sorting signed permutations by reversals without breaking common intervals. We describe a combinatorial framework for this problem that allows us to characterize classes of signed permutations for which one can compute, in polynomial time, a shortest reversal scenario that conserves all common intervals. In particular, we define a class of permutations for which this computation can be done in linear time with a very simple algorithm that does not rely on the classical Hannenhalli-Pevzner theory for sorting by reversals. We apply these methods to the computation of rearrangement scenarios between permutations obtained from 16 synteny blocks of the X chromosomes of the human, mouse, and rat 相似文献
148.
Sabela Búa Peggy Sotiropoulou Cecilia Sgarlata Luis R Borlado Manuel Eguren Orlando Domínguez Sagrario Ortega Marcos Malumbres Cedric Blanpain Juan Méndez 《Cell cycle (Georgetown, Tex.)》2015,14(24):3897-3907
Cdc6 encodes a key protein for DNA replication, responsible for the recruitment of the MCM helicase to replication origins during the G1 phase of the cell division cycle. The oncogenic potential of deregulated Cdc6 expression has been inferred from cellular studies, but no mouse models have been described to study its effects in mammalian tissues. Here we report the generation of K5-Cdc6, a transgenic mouse strain in which Cdc6 expression is deregulated in tissues with stratified epithelia. Higher levels of CDC6 protein enhanced the loading of MCM complexes to DNA in epidermal keratinocytes, without affecting their proliferation rate or inducing DNA damage. While Cdc6 overexpression did not promote skin tumors, it facilitated the formation of papillomas in cooperation with mutagenic agents such as DMBA. In addition, the elevated levels of CDC6 protein in the skin extended the resting stage of the hair growth cycle, leading to better fur preservation in older mice. 相似文献
149.
Ecological restoration is increasingly called on to provide ecosystem services (ES) valuable to humans, as well as to benefit biodiversity and improve wildlife habitat. Where mechanisms to pay for ES exist, they may serve as incentives to embark on habitat restoration projects. We evaluated the potential of newly established carbon markets in the United States to incentivize afforestation along riparian corridors, by comparing the income earnable by carbon offset credits with the costs of planting, maintaining, and registering such a restoration project in California. We used a 20‐year chronosequence of riparian forest sites along the Sacramento River as our model project. We found that carbon credits can repay more than 100% of costs after two decades of regrowth, if sufficient effort is put into sampling intensity in the first post‐restoration decade. However, carbon credits alone are unlikely to entice landowners currently engaged in agricultural activities to switch from farming crops to farming habitat. 相似文献
150.
Cataglyphis
fisheri
sp. n. is described and illustrated from the United Arab Emirates, Oman and Kingdom of Saudi Arabia based on the worker caste. It belongs to the Cataglyphis
pallida-group which is recorded for the first time from the Arabian Peninsula. Cataglyphis
fisheri
sp. n. is similar to Cataglyphis
pallida Mayr, 1877 from Kazakhstan. Differential diagnosis between these two species is given and a key to the species of the Cataglyphis
pallida-group is presented. Cataglyphis
laylae Collingwood, 2011 is treated as a junior synonym of Cataglyphis
saharae Santschi, 1929. Cataglyphis
flavobrunnea Collingwood & Agosti, 1996 is redescribed and a lectotype for this species is designated. 相似文献