BioZyme Inc.

Saint Joseph, MO, United States

BioZyme Inc.

Saint Joseph, MO, United States

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Brennaman L.H.,University of North Carolina at Chapel Hill | Moss M.L.,Biozyme Inc. | Maness P.F.,University of North Carolina at Chapel Hill
Journal of Neurochemistry | Year: 2014

EphrinA/EphA-dependent axon repulsion is crucial for synaptic targeting in developing neurons but downstream molecular mechanisms remain obscure. Here, it is shown that ephrinA5/EphA3 triggers proteolysis of the neural cell adhesion molecule (NCAM) by the metalloprotease a disintegrin and metalloprotease (ADAM)10 to promote growth cone collapse in neurons from mouse neocortex. EphrinA5 induced ADAM10 activity to promote ectodomain shedding of polysialic acid-NCAM in cortical neuron cultures, releasing a ~ 250 kDa soluble fragment consisting of most of its extracellular region. NCAM shedding was dependent on ADAM10 and EphA3 kinase activity as shown in HEK293T cells transfected with dominant negative ADAM10 and kinase-inactive EphA3 (K653R) mutants. Purified ADAM10 cleaved NCAM at a sequence within the E-F loop of the second fibronectin type III domain (Leu671-Lys672/Ser673-Leu 674) identified by mass spectrometry. Mutations of NCAM within the ADAM10 cleavage sequence prevented EphA3-induced shedding of NCAM in HEK293T cells. EphrinA5-induced growth cone collapse was dependent on ADAM10 activity, was inhibited in cortical cultures from NCAM null mice, and was rescued by WT but not ADAM10 cleavage site mutants of NCAM. Regulated proteolysis of NCAM through the ephrin5/EphA3/ADAM10 mechanism likely impacts synapse development, and may lead to excess NCAM shedding when disrupted, as implicated in neurodevelopmental disorders such as schizophrenia. PSA-NCAM and ephrinA/EphA3 coordinately regulate inhibitory synapse development. Here, we have found that ephrinA5 stimulates EphA3 kinase and ADAM10 activity to promote PSA-NCAM cleavage at a site in its second FNIII repeat, which regulates ephrinA5-induced growth cone collapse in GABAergic and non-GABAergic neurons. These findings identify a new regulatory mechanism which may contribute to inhibitory connectivity. PSA-NCAM and ephrinA/EphA3 coordinately regulate inhibitory synapse development. Here, we have found that ephrinA5 stimulates EphA3 kinase and ADAM10 activity to promote PSA-NCAM cleavage at a site in its second FNIII repeat, which regulates ephrinA5-induced growth cone collapse in GABAergic and non-GABAergic neurons. These findings identify a new regulatory mechanism which may contribute to inhibitory connectivity. Read the Editorial Highlight for this article on doi: 10.1111/jnc.12514 © 2013 International Society for Neurochemistry.


Patent
BioZyme Inc. | Date: 2011-10-07

The presently disclosed subject matter discloses isolated ADAM 10 modulating peptides and related compounds useful for studying the biological functions of ADAM 10 and for the treatment of diseases such as cancer, neurological disorders, asthma, and allergic responses, and disorders characterized at least in part by the presence of one or more of inflammation, excess cell proliferation, angiogenesis, and excess soluble CD23. In one aspect, the presently disclosed subject matter provides isolated mouse and human ADAM 10 prodomain comprising the sequence set forth in SEQ ID NOs 1-8, or a sequence having at least 95% homology to any of SEQ ID NOs 1-8 and having the functionality of modulating ADAM 10 activity.


Trademark
Biozyme Incorporated | Date: 2016-11-14

Animal feed supplements; Feed supplements for swine and poultry.


Trademark
Biozyme Incorporated | Date: 2016-11-14

Animal feed supplements; Feed supplements for goats.


Trademark
Biozyme Incorporated | Date: 2016-11-14

Animal feed supplements; Feed supplements for cattle.


Trademark
Biozyme Incorporated | Date: 2016-11-14

Animal feed supplements; Feed supplements for cattle.


Trademark
Biozyme Incorporated | Date: 2014-02-07

livestock supplements.


Patent
Duke University and Biozyme Inc. | Date: 2012-11-02

The presently disclosed subject matter discloses isolated ADAM 10 modulating peptides and related compounds useful for studying the biological functions of ADAM 10 and for the treatment of diseases such as cancer, neurological disorders, asthma, and allergic responses, and disorders characterized at least in part by the presence of one or more of inflammation, excess cell proliferation, angiogenesis, and excess soluble CD23. In one aspect, the presently disclosed subject matter provides isolated mouse and human ADAM 10 prodomain comprising the sequence set forth in SEQ ID NOs 1-8, or a sequence having at least 95% homology to any of SEQ ID NOs 1-8 and having the functionality of modulating ADAM 10 activity.


Trademark
Biozyme Incorporated | Date: 2014-01-29

livestock supplements.


Trademark
Biozyme Incorporated | Date: 2016-05-26

Feed supplements for livestock.

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