A Diaspro

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..Finally, we apply the method to photoactivatable green fluorescent protein diffusing freely in the nucleus of living NIH-3T3 mouse embryo fibroblasts...

..The present study was done to determine whether cells that ingest more nutrients also have a larger amount of storage lipids...

..As a conclusive comment, we believe that 2PE and related techniques can be considered as a mainstay of the modern biophysical research milieu and a bright perspective in optical microscopy...

..This enables molecular trafficking studies at high signal to noise ratio...

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..The key resides in the utilisation of the measured point spread function coupled to an appropriate image restoration approach, and, of course, in the stability of the confocal system being used...

..The scanning head allows conventional and two-photon confocal imaging. Point spread function measurements are reported with examples of applications to the study of biological systems...

..Nanocapsules are of biomedical interest because they can be used, for example, for the controlled release and targeting of drugs as well as for the protection of enzymes, proteins, and foreign cells...

..Cytosol acidification and incubation in sucrose medium or in chlorpromazine showed that WGA is internalized via clathrin vesicles, whereas fluid phase endocytosis is a clathrin-independent process...

..These two photoactivation methods provide a suitable tool for many biological applications, combining subresolved surface and in-depth three-dimensionally confined investigations...

..This GFP mutant therefore seems promising as an almost permanent chromophore for two-photon excitation (TPE) microscopy or for applications in single-molecule memory arrays...

..In order to compare the effective improvement in the quantitative image information analysis, we measured the volume of reference objects before and after image restoration, using the isotropic Fakir method...

..CLSM analysis indicates that cells preserve their subcellular structure and duplication capability after encapsulation. By coupling AFM and CLSM data, a correlation between local stiffness and duplication rate was obtained...

..In conclusion, this study points out that in P. primaurelia the cholesteryl ester enters the cell via food vacuoles and through the plasma membrane and, inside the cell, it alters cell functions...

..These results highlight a new photoconversion pathway for photochromic GFPs and can have significant applications in multi-photon confocal microscopy and in optical data-storage architectures...

..5 M. A theoretical analysis of the distributions indicates that this feature is a fingerprint of the competition between unfolding and refolding processes when the protein is very far from the midpoint denaturant concentration...

..Our preliminary results indicate the suitability of the introduced model as a test system of this permeability...

..The results show that two-photon excitation more closely fits ideal bleaching patterns even in the event of fluorescence saturation, achieving estimations of diffusion coefficients within 20% accuracy of the correct value...

..Several unfolding/refolding cycles can be followed on the same molecules, indicating full reversibility of the process and, noticeably, a bias of denaturated molecules toward refolding in the original protonation state...

..The presented results emphasize how photoactivation by non-linear excitation can provide a tool to increase contrast in widefield and confocal cellular imaging...

..At metamorphosis, positivity to cholinergic molecules translocated to the juvenile, where a high frequency of mAChR- and ChAT-like positive cells was found...

..An application of electric field may result in the excitation of poorly excitable biomolecules. This excitation technique may find applications in single- and multi-photon fluorescence microscopy, bioimaging and optical devices...

..Our data suggest that euplotin C enhances backward swimming in our unicellular model system by interacting with the ciliary Ca(2+) channel functions through the reduction of cell membrane fluidity...

..In this study, the presence and functional role of the adenosine diphosphoribosyl (ADPR)-cyclase-cyclic ADP-ribose (cADPR) system in bovine retinal rod outer segments (ROS) was investigated...

..These results suggest a neurotransmitter/neuromodulatory role for GABA in thoracic muscle contraction and regulatory functions in compound eyes and antennules of B. amphitrite cyprids...

..These data seem to indicate the involvement of ACh in the gut functions of barnacle and suggest that the barnacle alimentary tract is more complex than previously thought and requires further study...

..In these first measurements the encapsulation with a multilayer nanocapsule was shown to be a possible alternative to the more space-consuming and random islet-trapping microencapsulation...

..Therefore, the technique seems adequate to become an instrument to study the structure and the function of these and other subcellular fractions...

..The distribution pattern comparable to that of GABAergic molecules could indicate an interrelated agonistic/antagonistic role for these two systems, which could be considered as potential targets of combined antifouling strategies...

..The results demonstrated the possibility to fabricate a drug delivery system where the release of the drug is dependent on the biochemistry of the pathological state...

..These findings may provide important new insight into energy production in outer segments via aerobic metabolism and additional information about protein components in OS disk membranes...

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..Results obtained will show the advantages and the potentialities of our system as a smart toolbox for metal ions detection...

..This study represents a step toward a global physiological characterization of the disk proteome and provides information necessary for future studies on energy supply for phototransduction...

..We hypothesize that these peptides act as integrators in the central nervous system, perform neuromuscular functions for thoracic limbs, trigger intestinal movements and, at the level of the frontal filament, play a neurosecretory role...

..The effect of euplotin C on the food vacuole formation and fluid-phase endocytosis is apparently mediated by a modification of microtubule network...

..Hence the photobleaching due to one- and three-photon excitation can be eliminated and higher-order processes can be minimized owing to their small molecular cross section...

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..We demonstrate high-frequency and resolution enhancement in the case of linear and non linear fluorescence microscope approach under shot-noise condition...

..The distribution of these different immunoreactivities has allowed us to hypothesize GABA involvement in nematocyst discharge, in body wall and enteric muscular contraction, in neuronal integration and in male gametocyte differentiation...

..These results suggest that GABAB receptor endocytosis into clathrin-coated and -uncoated vesicles represents an important mechanism in the modulation of swimming behavior in Paramecium...

..These findings suggest that GABA receptors and their functional role are highly conservative traits in the animal kingdom prenervous system evolution...

..Additionally, when comparing the conventional photoactivation at lambda = 405 nm with a two-photon one, a sharper and better controllable three-dimensional volume of activation is obtained...

..Overall, these data indicate that silica gels represent an ideal matrix for following biologically relevant events at a single molecule level...

..The intensity of labelling of the alpha(6)-, beta(2/3)- and gamma(2)-subunits was more intense than the alpha(1)-, epsilon-, and theta-subunits, suggesting that the former are present in higher concentrations than the latter...

..In accordance with prior work, we find that coating does not kill the cells and coated GFP-expressing cells still function after immobilization, which we checked by fluorescence microscopy...

..The capsules exhibit interesting properties as valuable tool in science and a promising candidate for application in the field of medicine...

..GABAB vesicle structures also colocalize with TGN38-IR and rab11-IR. TGN38 and rab11 are proteins found in association with post-Golgi and recycling endosomes, respectively...

..Finally, synthesis and release of GABA in the environment by Paramecium have been demonstrated by HPLC. Possible correlations between GABA(B) receptor activation and the regulation of intracellular Ca(2+) levels are discussed...

..It is concluded that gliosomes purified from adult brain contain glutamate-accumulating vesicles and can release the amino acid by a process resembling neuronal exocytosis...

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..Unlike other potentials, the fuzzy potential distinguishes intensity variation due to genuine edges and noise. The proposed approach has generated artifact-free restored confocal microscopy images...

..This finding may shed light on previous reports of the existence of a proton potential across the disk membranes and on the mechanism of the adenosine tri-phosphate (ATP) supply for phototransduction, which still requires investigation...

..Activation of these GABA transporters elicits release of glutamate partially by reversal of glutamate transporters present on glutamatergic terminals and largely through anion channels...

..These findings suggest that fluorescence blinking itself might be employed as a reporter signal in nano-bio-technology applications...

..This method has been successfully validated for the correlative analysis of Russel Bodies subcellular compartments...

..This project constitutes a real and effective migration to the Web, extending computational approaches to image restoration to the whole microscopy user community, regardless of their background...

..We found that toxicity is influenced by all these factors and cannot be tested easily in a model...

..The optical sectioning effect is demonstrated as well as the distribution of excitation and of fluorescence emission...

..This suggestion is supported by Fluorescence Polarization measurements on GFPmut2 proteins bound to the NC layers...

..We discuss here some key elements related to the backward and forward SHG signal in terms of acquisition architecture and related microscopic imaging...

..These observations are interpreted as thermal bleaching where the temperature increase is induced by the two-photon absorption of the single dyes as confirmed also by numerical simulations...

..Our results indicate that GFPmut2 can be employed as a long-lived reporter of biological processes...

..Preliminary tests have shown that the dye cellular toxicity is negligible...

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..These results improve our knowledge of the gorgonian nervous system and demonstrate that most of the immunoreactive cells belong to neural elements...

..This inhibition suggests that an inflow of calcium ions through L-type channels mediates the muscimol-induced swimming behavior...

..In fact, even though much is known about the rod outer segment photoresponse, some unanswered questions remain, particularly about ATP supply, light adaptation, and morphogenesis...

..These data suggest that both APP and presenilin1 can be part of a common signaling pathway that regulates ERK1,2 and the cell cycle...

..Moreover, our data indicate that still unidentified cellular mechanisms, other than caspases activation, are responsible of the specific alteration of A betaPP processing during PCD...

..FRET data suggest a close interaction between APP and PS1 in subcellular compartments and at the centrosome of H4 cells. Using this approach we show that APP and PS1 are closely associated in the centrosomes of the H4 cell...

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..cerevisiae to superoxide dismutases and suggest that the induction of other stress-resistance genes regulated by Msn2/4 and Rim15 is required for maximum longevity extension...

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..In an ordered scale from lower to greater efficiency, we have S. coeruleus, B. japonicum blue, B. japonicum red, and F. salina. The possible implications of our findings for the process of photosensory transduction are discussed...

..The role of similar pathways in the regulation of longevity in organisms ranging from yeast to mice raises the possibility that mammals may also undergo programmed aging...

..Due to its high accumulation in neuroectodermal tumor cells AE could also kill tumor cells harboring p53 mutant genes. This property would further contribute to AE specific anti-tumor activity and might be exploitable in the clinic...