PRODUCT SEARCH
Please select a product category

PRODUCTS RECOMMEND
  • Individual cortical neurons can selectively respond to specific environmental features, such as visual motion or faces. How this relates to the selectivity of the presynaptic network across cortical layers remains unclear. We used single-cell-initiated, monosynaptically restricted retrograde transsynaptic tracing with rabies viruses expressing GCaMP6s to image, in vivo, the visual motion-evoked activity of individual layer 2/3 pyramidal neurons and their presynaptic networks across layers in mouse primary visual cortex. Neurons within each layer exhibited similar motion direction preferences, forming layer-specific functional modules. In one-third of the networks, the layer modules were locked to the direction preference of the postsynaptic neuron, whereas for other networks the direction preference varied by layer. Thus, there exist feature-locked and feature-variant cortical networks.

  • The dentate gyrus is the main entry gate for cortical input to the hippocampus and one of the few brain areas where adult neurogenesis occurs. Several studies have shown that it is relatively difficult to induce synaptic plasticity in mature but not in newborn dentate granule cells. In the present work we have systematically addressed how classical protocols to induce synaptic plasticity affect action potential firing and intrinsic excitability in mature granule cells. We found that stimulation paradigms considered to be relevant for learning processes consistently modified the probability to generate action potentials in response to a given synaptic input in mature cells, in some paradigms even without any modification of synaptic strength. Collectively the results suggest that plasticity of intrinsic dendritic excitability has a lower induction-threshold than synaptic plasticity in mature granule cells and that this form of plasticity might be an important mechanism by which mature granule cells contribute to hippocampal function.

  • Technological resources for sustained local control of molecular effects within organs, cells, or subcellular regions are currently unavailable, even though such technologies would be pivotal for unveiling the molecular actions underlying collective mechanisms of neuronal networks, signaling systems, complex machineries, and organism development. We present a novel optopharmacological technology named molecular tattooing, which combines photoaffinity labeling with two-photon microscopy. Molecular tattooing covalently attaches a photoreactive bioactive compound to its target by two-photon irradiation without any systemic effects outside the targeted area, thereby achieving subfemtoliter, long-term confinement of target-specific effects in vivo. As we demonstrated in melanoma cells and zebrafish embryos, molecular tattooing is suitable for dissecting collective activities by the separation of autonomous and non-autonomous molecular processes in vivo ranging from subcellular to organism level. Since a series of drugs are available for molecular tattoo, the technology can be implemented by a wide range of fields in the life sciences.

NEWS

Twinter Ltd. will be attending Shanghai FUMIN International Anesthesia and Perioperative Medicine Syposium,  from Sep 26th 2020 in Shanghai China  

Twinter Ltd. will be attending The 5th  Developmental Biology of National Conference  from Oct 27-29th 2020 in Guangzhou , Guangdong, China  

We will exhibit a booth A05

Introducing Luxendo’s last member of the light sheet solutions is the LCS. An economical, easy to use light sheet microscope for large cleared samples.

The LCS has a compact design and provides very fast and gentle 3D imaging of optically cleared samples, like whole mouse brains, organs etc.  

The basic configuration  is compatibility with a broad variety of clearing solutions and cuvette based (no fuming hood needed) and easy exchange of sample.

2019 Lightsheet imaging seminar  hold in Peking  University on 12th.Nov

Title: Lightsheet ——from function to structure
Speaker:Zheng Chao
Time :AM 9:30   12th.Nov
Room: Lv zhihe Building, B106

2019 Taishan Academic Form: International brain function and disease on Qingdao from 6 to 7th June .


2019 Lightsheet imaging seminar will hold in LanZhou University on June 27th

Winter will give report in this seminar. 

Title: Lightsheet ——from function to structure

Speaker:Winter Qi ( CEO of Twinter) 

Time :AM 9:30  June 27th.

Room: Yifu Biological Building, 509

Contact us Address :RM617, 6/F. Office Tower A, Beijing Fortune Plaza, 7 Dongsanhuan Zhong Road, Chaoyang District, Beijing City ,100022,China 中国北京市朝阳区东三环中路7号 北京财富中心写字楼A座6层617室 Telephone:010- 65129207 Fax :010- 65129207 Email :tim_liuyi@aliyun.com , tim@hktimwinter.com 京ICP备15043433号-1