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排序方式: 共有119条查询结果,搜索用时 31 毫秒
111.
Roosa AE Laitinen Suvi Broholm Victor A Albert Teemu H Teeri Paula Elomaa 《BMC plant biology》2006,6(1):11-18
Background
The inflorescence of the cut-flower crop Gerbera hybrida (Asteraceae) consists of two principal flower types, ray and disc, which form a tightly packed head, or capitulum. Despite great interest in plant morphological evolution and the tractability of the gerbera system, very little is known regarding genetic mechanisms involved in flower type specification. Here, we provide comparative staging of ray and disc flower development and microarray screening for differentially expressed genes, accomplished via microdissection of hundreds of coordinately developing flower primordia. 相似文献112.
Rafael Seoane Adolfo Eiras Otilia Quireza Esperanza Cancio Antonio Aguilera Eugenia Puentes 《Microbiology and immunology》1995,39(7):491-497
In this work, we demonstrate that the simultaneous injection of PC-KLH and Neisseria meningitidis-derived antigens [NMB or PC-(NMB)HI] induced in old NZB/W mice defective responses as does PC-KLH challenge. On the other hand, the simultaneous injection of both immunogenic preparations of N. meningitidis evoked responses similar to those shown by old mice challenged with NMB alone. Alteration in PC-specific PFC responses also affected hapten-free inhibition profiles and their heterogeneities. The increase in PC50s of anti-phosphorylcholine PFC responses and their heterogeneities induced by certain antigens with aging is correlated with a decrease in T15 idiotype expression, suggesting that after the T15 dominant clone disappears no other clone takes control of the anti-PC response. These results suggest that the mechanism(s) involved in the regulation of T15 marker expression play an important role in the inability of old NZB/W mice to mount good anti-PC responses and suggest that regulatory mechanisms induced by PC-KLH dominate those elicited by NMB. 相似文献
113.
114.
Marinela Couselo‐Seijas Jos N. Lopez‐Canoa ngel L. Fernandez Laila Gonzlez‐Melchor Luisa M. Seoane Darío Duran‐Muoz Adriana Rozados‐Luis Jos Ramn Gonzlez‐Juanatey Moiss Rodríguez‐Maero Sonia Eiras 《Journal of cellular and molecular medicine》2020,24(18):10958-10969
The modulation of acetylcholine (ACh) release by botulinum toxin injection into epicardial fat diminishes atrial fibrillation (AF) recurrence. These results suggest an interaction between autonomic imbalance and epicardial fat as risk factors of AF. Our aim was to study the inflammatory, lipidic and fibroblastic profile of epicardial stroma from patients who underwent open‐heart surgery, their regulation by cholinergic activity and its association with AF. We performed in vitro and ex vivo assays from paired subcutaneous and epicardial stromal cells or explants from 33 patients. Acute ACh effects in inflammation and lipid‐related genes were analysed by qPCR, in intracellular calcium mobilization were performed by Fluo‐4 AM staining and in neutrophil migration by trans‐well assays. Chronic ACh effects on lipid accumulation were visualized by AdipoRed. Plasma protein regulation by parasympathetic denervation was studied in vagotomized rats. Our results showed a higher pro‐inflammatory profile in epicardial regarding subcutaneous stromal cells. Acute ACh treatment up‐regulated monocyte chemoattractant protein 1 levels. Chronic ACh treatment improved lipid accumulation within epicardial stromal cells (60.50% [22.82‐85.13] vs 13.85% [6.17‐23.16], P < .001). Additionally, patients with AF had higher levels of fatty acid‐binding protein 4 (1.54 ± 0.01 vs 1.47 ± 0.01, P = .005). Its plasma levels were pronouncedly declined in vagotomized rats (2.02 ± 0.21 ng/mL vs 0.65 ± 0.23 ng/mL, P < .001). Our findings support the characterization of acute or chronic cholinergic activity on epicardial stroma and its association with AF. 相似文献
115.
The histopathology induced by Nematobothrium scombri (Trematoda) in Scomber japonicus and of larval anisakid nematodes in Pagrus pagrus is described. Nematodes larvae occurred within the liver capsule and N. scombri occurred within nodules in the opercula. The fishes were collected off the coast of Rio de Janeiro State. 相似文献
116.
Synopsis of the species of Thelohanellus Kudo, 1933 (Myxozoa: Myxosporea: Bivalvulida) 总被引:1,自引:0,他引:1
Jin Yong Zhang Ze Mao Gu Chaganti Kalavati Jorge Costa Eiras Yang Liu Qing Yang Guo Kálmán Molnár 《Systematic parasitology》2013,86(3):235-256
A synopsis of the species of Thelohanellus Kudo, 1933 (Myxozoa: Myxosporea: Myxobolidae) is presented. It includes a total of 108 nominal species. For each species, the most relevant morphological and morphometric characteristics are provided, together with data on the type-host and locality, the site of infection within the host and the original references. 相似文献
117.
118.
Filipe Vieira Santos de Abreu Maira Moreira Morais Sérvio Pontes Ribeiro álvaro Eduardo Eiras 《Memórias do Instituto Oswaldo Cruz》2015,110(5):669-676
Despite the importance of the mosquito Aedes aegypti in the
transmission of arboviruses, such as yellow fever, Chikungunya fever and dengue
fever, some aspects of their behaviour remain unknown. In the present study, the
oviposition behaviour of Ae. aegypti females that were exposed to
different densities of breeding sites (2, 4, 8 and 16) was evaluated in laboratory
and semi-field conditions. The number of breeding sites that were used was
proportional to the number available, but tended towards stabilisation. Females used
four-six breeding sites on average, with a maximum of 11. A high percentage of eggs
was observed in the water, along with the presence of a breeding site termed
“favourite”, which received at least 40% of the eggs. The results are discussed in
ecological, evolutionary and epidemiological approaches. 相似文献
119.