Search results for "Modula"

Tyramine action on motoneuron excitability and adaptable tyramine/octopamine ratios adjust Drosophila locomotion to nutritional state

2019

Adrenergic signaling profoundly modulates animal behavior. For example, the invertebrate counterpart of norepinephrine, octopamine, and its biological precursor and functional antagonist, tyramine, adjust motor behavior to different nutritional states. In Drosophila larvae, food deprivation increases locomotor speed via octopamine-mediated structural plasticity of neuromuscular synapses, whereas tyramine reduces locomotor speed, but the underlying cellular and molecular mechanisms remain unknown. We show that tyramine is released into the CNS to reduce motoneuron intrinsic excitability and responses to excitatory cholinergic input, both by tyraminehonoka receptor activation and by downstrea…

Pharmacological modulation of redox signaling pathways in disease

2020

A Kinetic Model of Short- and Long-Term Potentiation

1993

We present a kinetic model that can account for several experimental findings on short- and long-term potentiation (STP and LTP) and their pharmacological modulation. The model, which is consistent with Hebb's postulate, uses the hypothesis that part of the origin of LTP may be a consequence of an increased release of neurotransmitter due to a retrograde signal. The operation of the model is expressed by a set of irreversible reactions, each of which should be thought of as equivalent to a set of more complex reactions. We show that a retrograde signal alone is not sufficient to maintain LTP unless long-term change of the rate constant of some of the reactions is caused by high-frequency s…

3.5-μm bandwidth mid-infrared supercontinuum generation in a 2-cm long suspended-core chalcogenide fiber

2014

A supercontinuum source extending from 0.6 to 4.1 µm has been successfully generated in a 2-cm long As2S3 chalcogenide suspended-core fiber by means of a nJ-level 200-fs pumping at 2.5 µm.

ChemInform Abstract: A Modular Synthesis of Polysubstituted Indolizines.

2013

Title compounds are synthesized by [3 + 2] cycloaddition of nitroalkenes (IV) with pyridinium salts.

ChemInform Abstract: Modular Approach to 9-Monosubstituted Fluorene Derivatives Using MoVReagents.

2016

Modular Approach to 9-Monosubstituted Fluorene Derivatives Using Mo(V) Reagents.

2016

Oxidative coupling using molybdenum(V) reagents provides fast access to highly functionalized 9-monosubstituted fluorenes. This synthetic approach is highly modular, is high yielding, and tolerates a variety of labile moieties, e.g. amides or iodo groups. The established protocol leads to promising precursors for pharmacologically important analogues of melatonin.

Regulation of T-Cell Immune Responses by Pro-Resolving Lipid Mediators

2021

Both the initiation and the resolution of inflammatory responses are governed by the sequential activation, migration, and control/suppression of immune cells at the site of injury. Bioactive lipids play a major role in the fine-tuning of this dynamic process in a timely manner. During inflammation and its resolution, polymorphonuclear cells (PMNs) and macrophages switch from producing pro-inflammatory prostaglandins and leukotrienes to specialized pro-resolving lipid mediators (SPMs), namely, lipoxins, resolvins, protectins, and maresins, which are operative at the local level to limit further inflammation and tissue injury and restore homeostasis. Accumulating evidences expand now the rol…

Penicillium lanoso-viride AMP dezamināzi atpazīstošo receptoru klāsta detektēšana perifēro asiņu mononukleārajās šūnās

2016

Šajā darbā salīdzināta Penicillium lanoso-viride sintezētās AMPD un citu sēņu izcelsmes imūnmodulatoru un standartvielu iedarbība uz iekaisuma reakcijās iesaistītu molekulu gēnu ekspresiju un sekrēciju asins imūnsistēmas šūnās, un, balstoties uz rezultātos iegūto informāciju, veikta AMPD atpazīstošo PRR analīze. Ar RT-PCR metodi veiktās analīzes uzrāda, ka AMPD stimulētās asins imūnajās šūnās ir paaugstināta iekaisuma citokīnu, kā arī TLR4 signālceļā iesaistīto molekulu gēnu ekspresija, kas norāda uz tās iekaisumu veicinošo ietekmi. Ar receptoru bloķēšanas un ELISA proteīnu koncentrācijas noteikšanas metodes palīdzību noskaidrots, ka AMPD savu imūnmodulatoro darbību asins mononukleārajās šū…

Penicillium lanoso - viride AMP dezamināzes ietekme uz citokīnu izmaiņām pēc lielu devu I.V. ievadīšanas pelēm

2017

Adenilāta dezamināze (AMPD) ir glikoproteīns, kas ir dabisks sēņu izcelsmes imūnmodulators. To producē mikroskopiska sēnīte Penicillium lanoso - viride. Iepriekšējie pētījumi parādīja, ka attīrīts imūnmodulators AMPD uzrāda in vitro un in vivo aktivitāti, tai skaitā pozitīvu ietekmi uz brūču dzīšanu grauzējiem. Maģistra darba pētījumā tika izvērtēta ietekme uz citokīnu, limfocītu, neitrofilu un temperatūras izmaiņām pēc AMPD lielu devu i.v. ievadīšanas ICR peļu tēviņiem. Iegūtie rezultāti norāda uz AMPD īslaicīgu imūnstimulējošo iedarbību, pastiprināti inducējot citokīnu sekrēciju, limfocītu un neitrofilu skaita izmaiņas 4h pēc AMPD i.v. ievadīšanas pelēm. AMPD drošības profils ir optimāls,…