NMB Human

Neuromedin B Human Recombinant
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Description

Biological Functions and Mechanisms

NMB Human exerts its effects via the G-protein coupled neuromedin B receptor (NMBR), influencing pathways such as:

  • Smooth Muscle Contraction: Mimics bombesin’s action on gastrointestinal and respiratory systems .

  • Metabolic Regulation:

    • Suppresses appetite via hypothalamic signaling .

    • Adipose tissue expression decreases during cold exposure, suggesting energy-balance regulation .

  • Immune Modulation: Enhances IFN-α expression and reduces IL-6 during influenza A infection .

  • Cancer Progression:

    • Associated with improved survival in glioblastoma (GBM) patients (16.3 vs. 12.7 months; p = 0.002) .

    • Upregulates CSF1R in osteoclast precursors, promoting proliferation .

Cancer Biomarker Potential

NMB demonstrates diagnostic and prognostic value in GBM:

ParameterValueSource
AUC (ROC Analysis)0.984 (95% CI: 0.971–0.997)
Sensitivity96.4%
Specificity96.2%
Survival BenefitHigh vs. low expression: 16.3 vs. 12.7 months

Immunohistochemical staining confirms elevated NMB protein in GBM tissues compared to normal brain .

Recombinant Applications

NMB Human Recombinant (PRO-1518) is used in laboratory research for:

  • Studying smooth muscle physiology .

  • Investigating cancer cell proliferation mechanisms .

  • Limitations: Not approved for diagnostic, therapeutic, or household applications .

Expression and Regulation

  • Tissue Distribution: Highly expressed in murine epididymal adipose tissue (8x higher than liver or kidney) and human subcutaneous fat .

  • Regulatory Factors:

    • Energy balance changes modulate adipose NMB levels .

    • Steroidogenic mediators (e.g., STAR, CYP11A1) are upregulated in Leydig cells by NMB .

Product Specs

Introduction
Neuromedin B (NMB), a member of the bombesin/neuromedin-B/ranatensin family, stimulates smooth muscle contraction, similar to bombesin.
Description
Recombinant Human NMB, produced in E. coli, is a single, non-glycosylated polypeptide chain comprising 120 amino acids (25-121) with a molecular weight of 13.2 kDa. This protein includes a 23 amino acid His-tag at the N-terminus and is purified using proprietary chromatographic techniques.
Physical Appearance
Clear, colorless, and sterile-filtered solution.
Formulation
The NMB solution (0.5 mg/mL) is supplied in 20 mM Tris-HCl buffer (pH 8.0) containing 0.4 M urea and 10% glycerol.
Stability
For short-term storage (2-4 weeks), keep at 4°C. For extended storage, freeze at -20°C. Adding a carrier protein (0.1% HSA or BSA) is recommended for long-term storage. Avoid repeated freeze-thaw cycles.
Purity
Purity is greater than 85.0% as determined by SDS-PAGE.
Synonyms
Neuromedin-B, NMB, Neuromedin-B-32, Neuromedin B.
Source
Escherichia Coli.
Amino Acid Sequence
MGSSHHHHHH SSGLVPRGSH MGSAPLSWDL PEPRSRASKI RVHSRGNLWA TGHFMGKKSL EPSSPSPLGT APHTSLRDQR LQLSHDLLGI LLLKKALGVS LSRPAPQIQY RRLLVQILQK.

Product Science Overview

Gene Cloning and Expression

The genes encoding Neuromedin B and its receptor (NMBR) have been cloned and analyzed in various species. Studies have shown that the amino acid sequences and gene structures of NMB and NMBR are highly conserved across different species . This conservation suggests that Neuromedin B has essential physiological roles that have been maintained throughout evolution.

Physiological Functions

Neuromedin B performs a variety of physiological functions through its interaction with the NMBR. These functions include:

  • Smooth Muscle Contraction: NMB stimulates smooth muscle contraction in a manner similar to bombesin .
  • Reproductive Functions: NMB and NMBR are expressed in the reproductive axis, with varying expression levels during different phases of the estrous cycle in females and postnatal development stages in males .
  • Central Nervous System: NMB is primarily expressed in the CNS, where it may play a role in regulating various neurological functions .
Recombinant Human Neuromedin B

Recombinant human Neuromedin B is produced using recombinant DNA technology. This involves inserting the gene encoding NMB into a suitable expression system, such as E. coli, to produce the peptide in large quantities. The recombinant protein is often tagged with a His-tag to facilitate purification and detection .

The recombinant human Neuromedin B protein is used in various research applications to study its physiological functions and potential therapeutic uses. It is essential for understanding the role of NMB in health and disease and for developing potential treatments targeting the NMB/NMBR system.

Storage and Stability

Recombinant human Neuromedin B is typically stored in a buffer solution at -20°C for long-term storage. It is essential to avoid freeze-thaw cycles to maintain the protein’s stability and functionality .

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