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Mestin modulators and uses thereof

A moesin, a technology for use in the fields of molecular biology and medical research, can solve problems such as undiscovered duration or phase correlation

Active Publication Date: 2015-09-02
SHANGHAI KEXIN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the study did not find a clear correlation between the presence of anti-ERM antibodies and clinical manifestations such as the duration or stage of the disease

Method used

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  • Mestin modulators and uses thereof
  • Mestin modulators and uses thereof
  • Mestin modulators and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] Example 1 Preparation of anti-moesin antibody

[0141] Monoclonal antibodies against the C-terminal tail domain of Moesin were prepared using conventional hybridoma methods. To generate a C-terminal tail domain having the sequence SEQ ID NO: 1, PCR was used to amplify a cDNA fragment corresponding to the C-terminal tail domain described above (see SEQ ID shown in Figure 1 NO: 4, where the underlined part is the cDNA sequence of the C-terminal tail domain).

[0142] The PCR amplified moesin DNA fragment was cloned into an expression vector selected from pET32a(+) and pET28a(+). Then the constructed vector was used to transform the Escherichia coli host cell line BL21(DE3) for culture and expression. The restriction and cloning profiles of pET32a(+) and pET28a(+) are shown in Figure 2(a) and 2(b) . The expression system constructed for the C-terminal domain was validated using a restriction enzyme reaction by sequencing to confirm the correct reading frame for exp...

Embodiment 2

[0147] Example 2 Evaluating the Ability of Moesin Inhibitors to Inhibit Cell Proliferation

[0148]The ability of Moesin inhibitors to inhibit or reduce cell proliferation is assessed by this assay.

[0149] Cell proliferation assays were performed using a human pulmonary microvascular endothelial cell line (HPMEC). cells by 10 6 cells / cm 2 The density was seeded on six-well plates and the cells were cultured at room temperature in the presence of various test and control reagents as described below. After culturing for a defined period of time, cells are harvested and labeled for flow cytometry analysis. By dividing the OD of the test group 570 Mean value divided by the OD of the group with the same number of cells as the test group at the beginning of cell culture 570 Average values ​​were used to determine proliferation rates at 2 hours, 24 hours, and 36 hours.

[0150] The test and control groups are as follows:

[0151] 1) TNF-α only;

[0152] 2) Antibodies agai...

Embodiment 3

[0158] Example 3 Cell-to-cell expression and apoptosis analysis of moesin

[0159] Cell cultures were subjected to apoptosis assays and surface antigen assays in the presence of the anti-moesin antibody described in Example 1 to assess the antibody's effect on endothelial cell apoptosis and intercellular expression of moesin (indicating that the the active form of the protein).

[0160] Apoptosis was studied using Annexin V assay. The collected cells were washed with PBS, centrifuged, and 70% ethanol, RNAs (200 mg / l) and PI (20 mg / l) were added sequentially. Cells were then stained using the Annexin-V FITC / PI kit, which is used for double staining of FITC and PI, since live cells are negative for both FITC and PI, while early apoptotic cells are positive for FITC but negative for PI , Late apoptotic or dead cells were positive for both FITC and PI. Stained cells were analyzed using flow cytometry to determine the number of apoptotic cells in the presence of different dete...

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Abstract

The present application provides compositions and methods useful for treating and diagnosing diseases and disorders associated with moesin activation.

Description

technical field [0001] This application relates generally to molecular biology and medical research. More specifically, the present application is concerned with methods and compositions for modulating moesin activity and related disorders. Background technique [0002] Moesin, which stands for membrane tissue extension spike protein, is a membrane-bound intracellular protein originally identified in bovine uterus and characterized as a possible heparin receptor. Lankes et al., Biochem J. 251:831-42 (1988). The full-length native human Moesin has 577 amino acids and its molecular weight is about 75 kD. It has about 98.3% sequence identity with mouse moesin. Sato et al., J. Cell Sci. 103:131-143 (1992). [0003] Further studies identified moesin as a member of the ezrin-rootin-moesin (ERM) protein family. These proteins are predominantly expressed in the cytoplasm and are concentrated in actin-rich cell-surface structures. Sequence and structural analysis of ERM protein...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K38/16A61K39/395A61P35/00
Inventor 张玥包骏毛华寿志男司徒维娜
Owner SHANGHAI KEXIN BIOTECH
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