Tel Aviv, Israel
Tel Aviv, Israel

Tel Aviv University is a public university located in Ramat Aviv, Tel Aviv, Israel. With over 30,000 students, TAU is Israel's largest university.Located in Israel's cultural, financial and technological core, Tel Aviv University is a major center of teaching and research, comprising 9 faculties, 27 schools, 98 departments and nearly 130 research institutes and centers. Wikipedia.

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Tel Aviv University | Date: 2016-08-11

Composite structures composed of a fibril core and a polymeric coat and designed capable of encapsulating both hydrophobic and hydrophilic bioactive agents while retaining the activity of these agents are disclosed. Further disclosed are processes of preparing such composite structures, and medical devices and disposable articles made therefrom.

Methods for the prevention and treatment of ocular disorders, in particular glaucoma, through blocking the toxic effects of -amyloid (A) derivatives, and pharmaceutical compositions for effecting such prevention and treatment thereof.

The present invention relates to new molecular design that allows micelles to report their activation and disassembly by an enzymatic trigger. The molecular design is based on introduction of a labeling moiety selected from a fluorescent dye, a dark quencher, combinations of dyes or dyes/quenchers, and a fluorinated moiety (a ^(19)F-magenetic resonance (MR) probe for turn ON/OFF of a ^(19)F-MR signal) through covalent binding to the focal point of amphiphilic polymer-dendron hybrids with the labeling moiety. At the assembled micellar state, the dyes are closely packed and hence the probability for intermolecular interactions increases significantly, leading to alteration of the fluorescent properties (signal quench or shift) or the ^(19)F-MR signal (OFF state) of the micelles. Upon enzymatic cleavage of the hydrophobic end-groups from enzyme-responsive dendron, the polymers become hydrophilic and disassemble. This structural change is then translated into a spectral change as dye-dye interactions are halted and the dyes regain their intrinsic fluorescent properties, or alternatively by turn ON the ^(19)F-MR signal. The high modularity of the design allows the introduction of various types of dyes and thus enables rational adjustment of the spectral response. Two major types of responses are described: Turn-On/Off and spectral shift, depending on the type of labeling dye. The present invention further provides methods of use of the hybrid delivery system and to a kit comprising the same.

Tel Aviv University and Technion Research & Development Foundation Ltd. | Date: 2016-08-15

Embodiments of the invention provide derivatives of Amphotericin B having increased solubility and reduced toxicity relative to AMB, while retaining antifungal activity against multiple clinical fungal isolates. Derivatives of AMB are provided comprising a polymer group having an amine group, the polymer linked to mycosamine via a relatively stable linker such as an amide linker. The derivatives may be of the general formula [I]: wherein R is H, C_(1-4 )alkyl or phenyl; R^(2 )is (CH_(2))_(m )wherein m is between 0 and 4; R^(3 )and R^(4 )are each independently H or C_(1-4 )alkyl, R^(5 )is H or OH, R^(6 )is selected from a group consisting of: amide and alkyl, and R^(7 )is a water-soluble polymer, and pharmaceutically acceptable salts, solvates, hydrates, diastereomers, and prodrugs of the compound of Formula [I].

Infrastructure, Services Ltd. and Tel Aviv University | Date: 2015-04-28

A method of providing an intraoperative magnetic resonance image of a target site of a patient body at which a medical procedure is performed, the method comprising: acquiring a high resolution preoperative magnetic resonance image (MRI), MRI0, of a first region of the patient comprising the target site, the MRI0 image comprising a plurality of slices MRI0 n having voxels; acquiring a preoperative, iMRI0 image of a second region of the patient comprising the target site, using an iMRI scanner having a field of view (FOV), the iMRI0 image comprising plurality of slices iMRI0 m having voxels; registering the MRI0 image to the iMRI0 image to provide a rigid body transform (RT0) that transforms the MRI0 to the iMRI0 image; acquiring an IMRI1 image of the target site during performance of the procedure; registering the image iMRI0 to the iMRIj image to obtain a non-rigid body transform (NRT); and applying RT0 and NRT to MRI0 to provide a high resolution (hiQ-iMRIj) image.

Tel Aviv University | Date: 2015-09-10

A method of fabricating a nanostructure, which comprises forming an elongated tubular nanostructure, and generating conditions for said tubular nanostructure to unwrap.

The NAP motif of activity-dependent neuroprotective protein (ADNP) enhanced memory scores in patients suffering from mild cognitive impairment and protected activities of daily living in schizophrenia patients, while fortifying microtubule (MT)-dependent axonal transport, in mice and flies. The question is how does NAP fortify MTs? Our sequence analysis identified the MT end-binding protein (EB1)-interacting motif SxIP (SIP, Ser-Ile-Pro) in ADNP/NAP and showed specific SxIP binding sites in all members of the EB protein family (EB1-3). Others found that EB1 enhancement of neurite outgrowth is attenuated by EB2, while EB3 interacts with postsynaptic density protein 95 (PSD-95) to modulate dendritic plasticity. Here, NAP increased PSD-95 expression in dendritic spines, which was inhibited by EB3 silencing. EB1 or EB3, but not EB2 silencing inhibited NAP-mediated cell protection, which reflected NAP binding specificity. NAPVSKIPQ (SxIP=SKIP), but not NAPVAAAAQ mimicked NAP activity. ADNP, essential for neuronal differentiation and brain formation in mouse, a member of the SWI/SNF chromatin remodeling complex and a major protein mutated in autism and deregulated in schizophrenia in men, showed similar EB interactions, which were enhanced by NAP treatment. The newly identified shared MT target of NAP/ADNP is directly implicated in synaptic plasticity, explaining the breadth and efficiency of neuroprotective/neurotrophic capacities.Molecular Psychiatry advance online publication, 2 September 2014; doi:10.1038/mp.2014.97.

Kupiec M.,Tel Aviv University
FEMS Microbiology Reviews | Year: 2014

Telomeres are nucleoprotein structures that cap the ends of the linear eukaryotic chromosomes and thereby protect their stability and integrity. Telomeres play central roles in maintaining the genome's integrity, distinguishing between the natural chromosomal ends and unwanted double-stranded breaks. In addition, telomeres are replicated by a special reverse transcriptase called telomerase, in a complex mechanism that is coordinated with the genome's replication. Telomeres also play an important role in tethering the chromosomes to the nuclear envelope, thus helping in positioning the chromosomes within the nucleus. The special chromatin configuration of telomeres affects the expression of nearby genes; nonetheless, telomeres are transcribed, creating noncoding RNA molecules that hybridize to the chromosomal ends and seem to play regulatory roles. The yeast Saccharomyces cerevisiae, with its sophisticated genetics and molecular biology, has provided many fundamental concepts in telomere biology, which were later found to be conserved in all organisms. Here, we present an overview of all the aspects of telomere biology investigated in yeast, which continues to provide new insights into this complex and important subject, which has significant medical implications, especially in the fields of aging and cancer. Telomeres, the eukaryotic chromosomal ends, preserve genome stability and help duplicate the genome. They play important roles in aging and cancer. © 2013 Federation of European Microbiological Societies. Published by John Wiley & Sons Ltd. All rights reserved.

Shiloh Y.,Tel Aviv University | Ziv Y.,Tel Aviv University
Nature Reviews Molecular Cell Biology | Year: 2013

The protein kinase ataxia-telangiectasia mutated (ATM) is best known for its role as an apical activator of the DNA damage response in the face of DNA double-strand breaks (DSBs). Following induction of DSBs, ATM mobilizes one of the most extensive signalling networks that responds to specific stimuli and modifies directly or indirectly a broad range of targets. Although most ATM research has focused on this function, evidence suggests that ATM-mediated phosphorylation has a role in the response to other types of genotoxic stress. Moreover, it has become apparent that ATM is active in other cell signalling pathways involved in maintaining cellular homeostasis. © 2013 Macmillan Publishers Limited. All rights reserved.

Rechavi O.,Tel Aviv University
Trends in Cell Biology | Year: 2014

Small RNA-mediated gene silencing plays a pivotal role in genome immunity by recognizing and eliminating viruses and transposons that may otherwise colonize the genome. However, individual genomic parasites are highly diverse and employ multiple immune-evasion techniques, making this silencing challenging. Here I review a new theory proposing that the integrity of the germline is maintained by transgenerationally transmitted RNA 'memories' that record ancestral gene expression patterns and delineate 'self' from 'foreign' sequences. To maintain such recollection, two tactics are employed in parallel: 'black listing' of invading nucleic acids and 'guest listing' of endogenous genes. Studies in several organisms have shown that this memorization is used by the next generation of small RNAs to act as 'inherited vaccines' that attack invading elements or as 'inherited licenses' that permit the transcription of autogenous sequences. © 2013 Elsevier Ltd.

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