REG3A Antibody

Regenerating Islet-Derived 3 Alpha, Polyclonal Rabbit Anti-Human Antibody
Cat. No.
BT5940
Source
Synonyms
Regenerating islet-derived protein 3 alpha, Reg III-alpha, Pancreatitis-associated protein 1, REG3A, HIP, PAP, PAP1, REG3, INGAP, PAP-H, PBCGF, REG-III.
Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Purity
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

The Antibody was raised in rabbits by immunization with the recombinant human REG3A. The amino acid sequence of the recombinant human REG3A is 100% homologus to the amino acid sequence of the human REG3A sequence. The immunization antigen is the 18.4 kDa protein containing 149 amino acid residues- His Tag.

Product Specs

Introduction
Pancreatitis-associated protein (PAP), absent in the healthy pancreas, is highly induced during acute pancreatitis. Although exhibiting anti-bacterial and antiapoptotic properties in vitro, its precise in vivo function remains unclear. Studies using anti-sense oligonucleotides to suppress PAP expression in a rat model led to exacerbated pancreatitis. PAP released from the pancreas during pancreatitis may contribute to lung inflammation by stimulating hepatic TNF-alpha production, subsequently elevating circulating TNF-alpha levels. PAP is activated in primary liver cancers. Notably, it's absent in mature hepatocytes of a healthy liver but found in specific ductular cells, suggesting potential hepatic progenitor cells. PAP might function as a hepatic cytokine with combined mitogenic and anti-apoptotic effects on hepatocytes, effectively acting as an in vivo growth factor for enhanced liver regeneration. In pancreatic cancer, PAP overexpression was observed in 79% (30/38) of pancreatic ductal adenocarcinoma cases, 19% (7/36) of chronic pancreatitis cases, and 29% (2/7) of mucinous cystadenoma cases. PAP was detected in malignant ductular structures within pancreatic carcinomas, as well as in benign proliferating ductules and acinar cells in chronic pancreatitis. Elevated PAP levels in pancreatic cancer patients are not solely attributed to concurrent pancreatitis but appear linked to increased production by cancer cells, correlating with tumor burden as per UICC stages. Epithelial PAP expression is induced during intestinal mucosal inflammation triggered by commensal bacteria or DSS exposure, mirroring observations in inflamed IBD colon. Elevated serum PAP levels (> 50 ng/mL) serve as a diagnostic marker for ileal Crohn's disease with 60% sensitivity, 94% specificity, 84% positive predictive value, and 81% negative predictive value. This elevated serum PAP is significantly associated with both disease activity and ileal involvement in Crohn's disease.
Description
This antibody was generated by immunizing rabbits with a recombinant human REG3A protein. The recombinant protein's amino acid sequence shares 100% homology with the human REG3A sequence. The 18.4 kDa immunization antigen comprises 149 amino acid residues and a His Tag.
Species Reactivity
Reacts with human.
Titer
Evaluated via indirect ELISA, the titer is defined as follows: >1:100,000 for an antibody concentration of 1 mg/ml, using 25 ng of coated antigen per well. This determination is made at the point of maximum decrease on the titration curve.
Physical Appearance
Supplied as a sterile, filtered, white lyophilized (freeze-dried) powder.
Formulation
The antibody solution undergoes sterile filtration and is lyophilized from a 1 mg/ml concentration in a buffer composed of 0.05M Phosphate, 0.1M NaCl, at pH 7.2.
Solubility
To reconstitute, add 0.1 ml of deionized water to the lyophilized pellet and allow it to dissolve completely. Minor turbidity after reconstitution is acceptable and does not affect antibody activity. Should turbidity occur, centrifuge the solution to clarify.
Stability
Store the lyophilized antibody at -20°C. After reconstitution, aliquot the product to minimize freeze-thaw cycles and store frozen at -80°C. Reconstituted antibody remains stable at 4°C for a limited duration, showing no significant change over a two-week period at this temperature.
Synonyms
Regenerating islet-derived protein 3 alpha, Reg III-alpha, Pancreatitis-associated protein 1, REG3A, HIP, PAP, PAP1, REG3, INGAP, PAP-H, PBCGF, REG-III.
Purification Method
Immunoaffinity chromatography on a column with immobilized recombinant human REG3A.
Type
Polyclonal Rabbit Antibody.
Immunogen

MRGSHHHHHH GMASHMEEPQ RELPSARIRC PKGSKAYGSH CYALFLSPKS WTDADLACQK RPSGNLVSVL SGAEGSFVSS LVKSIGNSYS YVWIGLHDPT QGTEPNGEGW EWSSSDVMNY FAWERNPSTI SSPGHCASLS RSTAFLRWKD YNCNVRLPYV CKFTD.

Product Science Overview

Introduction

Regenerating islet-derived 3 alpha (REG3A) is a protein that plays a crucial role in the body’s immune response and tissue regeneration. It is part of the Regenerating gene (Reg) family, which is known for its involvement in cell proliferation, differentiation, and survival. The polyclonal rabbit anti-human REG3A antibody is a valuable tool in biomedical research, particularly in studies related to pancreatic function, inflammation, and cancer.

Regenerating Islet-Derived 3 Alpha (REG3A)

REG3A, also known as hepatointestinal pancreatic protein (HIP/PAP), is a member of the C-type lectin family. It is primarily expressed in the pancreas and small intestine, where it is involved in the regeneration of islet cells and the maintenance of intestinal homeostasis. REG3A has antimicrobial properties and is known to bind to bacterial peptidoglycans, thereby playing a role in the innate immune response .

Polyclonal Rabbit Anti-Human REG3A Antibody

Polyclonal antibodies are produced by immunizing animals, such as rabbits, with an antigen—in this case, the human REG3A protein. The immune system of the rabbit generates a diverse array of antibodies that recognize multiple epitopes on the antigen. This polyclonal nature makes these antibodies highly sensitive and capable of detecting the target protein in various applications, including immunohistochemistry (IHC), immunofluorescence (IF), and western blotting .

Production and Validation

The production of polyclonal rabbit anti-human REG3A antibodies involves several steps:

  1. Immunization: Rabbits are immunized with a recombinant fragment of the human REG3A protein. This fragment typically corresponds to a specific region of the protein, such as amino acids 100 to the C-terminus .
  2. Antibody Collection: After a series of booster immunizations, blood is collected from the rabbits, and the serum is separated. This serum contains the polyclonal antibodies.
  3. Purification: The antibodies are purified using affinity chromatography, where the target antigen is used as a ligand to selectively capture the specific antibodies from the serum .
Applications

Polyclonal rabbit anti-human REG3A antibodies are widely used in research to study the expression and function of REG3A in various biological contexts:

  • Immunohistochemistry (IHC): These antibodies are used to detect REG3A in tissue sections, providing insights into its localization and abundance in different tissues .
  • Immunofluorescence (IF): By labeling the antibodies with fluorescent dyes, researchers can visualize the distribution of REG3A in cells and tissues under a fluorescence microscope .
  • Western Blotting: These antibodies are used to detect REG3A in protein extracts, allowing researchers to quantify its expression levels in different samples .
Significance in Research

REG3A has been implicated in various physiological and pathological processes, making it a significant target for research:

  • Pancreatic Function: REG3A is involved in the regeneration of pancreatic islet cells, which are crucial for insulin production and glucose homeostasis .
  • Inflammation: REG3A plays a role in the immune response to bacterial infections, particularly in the gut, where it helps maintain intestinal barrier integrity .
  • Cancer: Altered expression of REG3A has been observed in several cancers, including pancreatic and colorectal cancers, suggesting its potential as a biomarker for diagnosis and prognosis .

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