VEGI Human

Human Vascular Endothelial Growth Inhibitor Recombinant
Cat. No.
BT8784
Source
Escherichia Coli.
Synonyms
Tumor necrosis factor ligand superfamily member 15, TNFSF-15, TNFSF15, TNF ligand-related molecule 1, VEGI, TL-1, TL1, TL1A, VEGI192A, VEGI-192, MGC129934, MGC129935.
Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Purity
Greater than 95.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
Usage
Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

TNFSF15 Human Recombinant produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 180 amino acids and having a molecular mass of 20.5kDa. The TNFSF15 is purified by proprietary chromatographic techniques.

Product Specs

Introduction
TNFSF15, a member of the tumor necrosis factor (TNF) ligand family, is a cytokine primarily found in endothelial cells. Its expression, absent in B and T cells, can be induced by TNF and IL-1 alpha. TNFSF15 interacts with receptors TNFRSF25 and TNFRSF21/DR6, triggering NF-kappaB and MAP kinase activation. This autocrine factor induces apoptosis in endothelial cells and inhibits their proliferation, suggesting a role as an angiogenesis inhibitor. While an additional isoform from an alternatively spliced transcript variant has been identified, its sequence remains undetermined.
Description
Recombinant human TNFSF15, produced in E. coli, is a non-glycosylated polypeptide chain composed of 180 amino acids. With a molecular weight of 20.5 kDa, this purified protein is obtained through proprietary chromatographic techniques.
Physical Appearance
Sterile, lyophilized powder with a white appearance.
Formulation
TNFSF15 undergoes lyophilization from a 0.2 µm filtered solution in PBS (pH 7.4) containing 0.02% Tween-20.
Solubility
For reconstitution, dissolve the lyophilized TNFSF15 in sterile 18 MΩ-cm H2O to a concentration of at least 100 µg/ml. Further dilutions can be prepared in other aqueous solutions.
Stability
While stable at room temperature for up to 3 weeks, it is recommended to store desiccated TNFSF15 below -18°C. After reconstitution (VEGI), store at 4°C for 2-7 days. For long-term storage, add a carrier protein (0.1% HSA or BSA) and store below -18°C. Avoid repeated freeze-thaw cycles.
Purity
Purity exceeds 95.0% as determined by: (a) RP-HPLC analysis and (b) SDS-PAGE analysis.
Biological Activity
The ED50, assessed by the ability to induce apoptosis in human TF-1 cells, is less than 20 ng/ml. This corresponds to a specific activity greater than 5.0 x 10^4 IU/mg.
Synonyms
Tumor necrosis factor ligand superfamily member 15, TNFSF-15, TNFSF15, TNF ligand-related molecule 1, VEGI, TL-1, TL1, TL1A, VEGI192A, VEGI-192, MGC129934, MGC129935.
Source
Escherichia Coli.
Amino Acid Sequence

MQLTKGRLHFSHPLSHTKHISPFVTDAPLRADGDKPRAHL
TVVRQTPTQHFKNQFPALHWEHELGLAFTKNRMNYTNKF
LLIPESGDYFIYSQVTFRGMTSECSEIRQAGRPNKPDSIT
VVITKVTDSYPEPTQLLMGTKSVCEVGSNWFQPIYLGAM
FSLQEGDKLMVNVSDISLVDYTKEDKTFFGAFLL.

Product Science Overview

Introduction

Human Vascular Endothelial Growth Inhibitor (VEGI) is a protein that plays a crucial role in regulating angiogenesis, the process through which new blood vessels form from pre-existing vessels. Angiogenesis is essential for various physiological processes, including wound healing and embryonic development, but it also plays a significant role in the progression of diseases such as cancer. Recombinant technology allows for the production of VEGI in a laboratory setting, enabling researchers to study its functions and potential therapeutic applications.

Structure and Function

VEGI belongs to the tumor necrosis factor (TNF) superfamily and is known for its ability to inhibit the proliferation of endothelial cells, which line the interior surface of blood vessels. By binding to specific receptors on these cells, VEGI can induce apoptosis (programmed cell death) and inhibit angiogenesis. This makes it a potential candidate for anti-cancer therapies, as it can starve tumors of the blood supply they need to grow and metastasize.

Production of Recombinant VEGI

Recombinant VEGI is produced using genetic engineering techniques. The gene encoding VEGI is inserted into an expression vector, which is then introduced into a host cell, such as bacteria or yeast. These host cells are cultured under conditions that promote the expression of the VEGI protein, which can then be purified for research or therapeutic use.

Therapeutic Applications

One of the most promising applications of recombinant VEGI is in cancer therapy. By inhibiting angiogenesis, VEGI can potentially reduce tumor growth and spread. Studies have shown that combining VEGI with other treatments, such as immune checkpoint inhibitors, can enhance its anti-tumor effects . For example, a study involving elderly patients with non-small cell lung cancer (NSCLC) demonstrated that combining recombinant VEGI with anti-PD-1 therapy improved progression-free survival and overall survival .

Challenges and Future Directions

Despite its potential, there are several challenges associated with the use of recombinant VEGI. One of the main issues is the potential for toxicity, as inhibiting angiogenesis can also affect normal physiological processes. Additionally, the production of recombinant proteins can be complex and costly. Future research is focused on improving the efficacy and safety of VEGI-based therapies, as well as developing more efficient production methods .

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