TLR4-MD2

By Targets:	Androgen Receptor (2) Apoptosis (1) Bacterial (1) Bcl-2 Family (1) Caspase (1) Cdc42-binding kinase (1) Galectin (1) Histone Acetyltransferase (2) Interleukin Related (2) NF-κB (1) NOD-like Receptor (NLR) (1) Reactive Oxygen Species (ROS) (1) Reference Standards (2) TNF Receptor (2) Toll-like Receptor (TLR) (13)
By Research Areas:	Cancer (3) Cardiovascular Disease (1) Infection (1) Inflammation/Immunology (12) Metabolic Disease (2) Neurological Disease (1)

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-N0795

Procyanidin B1 Maximum Cited Publications 7 Publications Verification	Toll-like Receptor (TLR)	Inflammation/Immunology
Procyanidin B1 is a polyphenolic flavonoid isolated from commonly eaten fruits, binds to *TLR4/MD-2* complex, and has anti-inflammatory activity.

HY-N2345

Procyanidin B3 1 Publications Verification	Histone Acetyltransferase Toll-like Receptor (TLR) Androgen Receptor	Inflammation/Immunology Cancer
Procyanidin B3 is a natural product with antioxidant activity and oral bioavailability, possessing good blood-brain barrier penetration. Procyanidin B3 is a selective inhibitor of histone acetyltransferase (HAT). By inhibiting p300 HAT-mediated acetylation of the androgen receptor (androgen receptor). Procyanidin B3 alleviates intervertebral disc degeneration (IVDD) by inhibiting the formation of the *TLR4/MD-2* complex. Procyanidin B3 can be used in research on prostate cancer and arthritis .

HY-D1056H

Lipopolysaccharides, from S. marcescens 1 Publications Verification LPS, from Serratia marcescens	Toll-like Receptor (TLR)	Inflammation/Immunology
Lipopolysaccharides, from S. marcescens (Serratia marcescens) are lipopolysaccharide endotoxins and *TLR-4* activators derived from Serratia marcescens, classified as S-type LPS, which can activate pathogen-associated molecular patterns (PAMP) of the immune system and induce cellular secretion of migrasomes. Lipopolysaccharides, from S. marcescens exhibit a typical three-part structure: O-antigen (O-antigen), core oligosaccharide (core oligosaccharide), and lipid A (Lipid A). Lipopolysaccharides, from S. marcescens induce NF-κB activation in mouse cells via Toll-like receptor (TLR4)/MD-2. The lipopolysaccharides of S. marcescens can induce apoptosis in host immune cells, thereby suppressing the host's innate immunity . It is recommended to prepare a solution with concentration ≥2 mg/mL. Vortex thoroughly for more than 10 minutes. Due to the adsorption characteristics of LPS, silanized container or low adsorption centrifuge tubes should be used for aliquoting and storage, and mix thoroughly before use.

HY-126154

L48H37 1 Publications Verification	Toll-like Receptor (TLR)	Inflammation/Immunology
L48H37 is an analog of Curcumin (HY-N0005) with improved chemical stability. L48H37 is a potent and specific myeloid differentiation protein 2 (MD2) inhibitor and inhibits the interaction and signaling transduction of LPS-TLR4/MD2. L48H37 is used for the research of sepsis or lung injury treatment .

HY-W082785A

L6H21 1 Publications Verification	TNF Receptor Interleukin Related Toll-like Receptor (TLR) NF-κB NOD-like Receptor (NLR) Apoptosis Caspase Bcl-2 Family Reactive Oxygen Species (ROS)	Neurological Disease Metabolic Disease Inflammation/Immunology
L6H21, a Chalcone (HY-121054) derivative, is an orally active, potent and specific myeloid differentiation 2 (MD-2) inhibitor. L6H21 directly binds to MD-2 protein with a high affinity and low K_D value of 33.3 μM, blocking the formation of the LPS-TLR4/MD-2 complex. L6H21 inhibits LPS-induced expression of TNF-α and IL-6 in RAW264.7 macrophages, with IC₅₀ values of 6.58 and 8.59 μM, respectively. L6H21 can be used for alcoholic liver disease, metabolic disturbance and neuroinflammation research .

HY-N9347

Stepharine 3 Publications Verification	Toll-like Receptor (TLR)	Cardiovascular Disease Inflammation/Immunology
Stepharine, an natural alkaloid, directly interactes with *TLR4* and binds to the TLR4/MD2 complex (TLR4 inhibitor). Stepharine possesses anti-aging, anti-viral and anti-hypertensive effects .

HY-N16021

4A-MPLA ammonium	Toll-like Receptor (TLR) Cdc42-binding kinase Galectin	Inflammation/Immunology
4A-MPLA ammonium is an orally active *TLR4* agonist. 4A-MPLA ammonium induces TLR4 endocytosis dependent on *Cdc42* and galectin-3, triggering TRIF-mediated signaling and sustained IFN-β production. 4A-MPLA ammonium promotes lipid droplet formation, upregulates interferon-stimulated genes and type I IFN signaling genes, downregulates lysosome/phagosome function genes, and modulates tolerogenic dendritic cell function. 4A-MPLA ammonium can be used for the research of colitis .

HY-117573

1Z105	Toll-like Receptor (TLR)	Inflammation/Immunology
1Z105 is an oral active *TLR4/MD2* ligand. 1Z105 enhances dendritic cell maturation and antigen presentation and prevents rthritis .

HY-N0795R

Procyanidin B1 (Standard)	Reference Standards Toll-like Receptor (TLR)	Inflammation/Immunology
Procyanidin B1 (Standard) is the analytical standard of Procyanidin B1. This product is intended for research and analytical applications. Procyanidin B1 is a polyphenolic flavonoid isolated from commonly eaten fruits, binds to TLR4/MD-2 complex, and has anti-inflammatory activity.

HY-179036

APG-7	Toll-like Receptor (TLR)	Metabolic Disease Inflammation/Immunology Cancer
APG-7 binds to the *TLR4/MD-2* interface, thereby inhibiting NO production (IC₅₀ of 24.2 μg/mL). APG-7 is an Apigenin (HY-N1201) derivative. APG-7 has low toxicity to the 3T3 fibroblast cell line. APG-7 can be used for the study of oxidative stress and inflammation .

HY-N2345R

Procyanidin B3 (Standard)	Reference Standards Histone Acetyltransferase Toll-like Receptor (TLR) Androgen Receptor	Inflammation/Immunology Cancer
Procyanidin B3 (Standard) is the analytical standard of Procyanidin B3. This product is intended for research and analytical applications. Procyanidin B3 is a natural product with antioxidant activity and oral bioavailability, possessing good blood-brain barrier penetration. Procyanidin B3 is a selective inhibitor of histone acetyltransferase (HAT). By inhibiting p300 HAT-mediated acetylation of the androgen receptor (androgen receptor). Procyanidin B3 alleviates intervertebral disc degeneration (IVDD) by inhibiting the formation of the TLR4/MD-2 complex. Procyanidin B3 can be used in research on prostate cancer and arthritis .

HY-182034

GAP214	Toll-like Receptor (TLR) Interleukin Related TNF Receptor	Inflammation/Immunology
GAP214 is a monosaccharide lipid A analogue and *TLR4/MD-2* complex modulator.GAP214 binds to the *TLR4/MD-2* complex via hydrophobic interactions, salt bridges, and hydrogen bonds, induces dimerization of the complex to initiate intracellular signaling cascades.GAP214 functions as an immunostimulant and vaccine adjuvant, enhances antigen-specific IgG antibody production in a mouse model .

HY-P11580

Pap12-6-10	Toll-like Receptor (TLR) Bacterial	Infection
Pap12-6-10 is an MD-2 ligand that binds to the hydrophobic pocket of MD-2 to inhibit the dimerization of the *TLR4/MD-2* complex and downstream inflammatory signal transduction. Pap12-6-10 also binds to LPS to permeabilize bacterial cell membranes and induce oxidative stress, leading to bacterial death. Pap12-6-10 regulates LPS-induced inflammatory responses through the TLR4 signaling pathway and exhibits antibacterial activity against multidrug-resistant Gram-negative bacteria. Pap12-6-10 shows low tendency to induce drug resistance and low preclinical cytotoxicity, and it prevents organ damage in a mouse model of sepsis. Pap12-6-10 can be used for research related to Gram-negative sepsis and carbapenem-resistant Acinetobacter baumannii infections .

Cat. No.	Product Name	Type

HY-D1056H

Lipopolysaccharides, from S. marcescens 1 Publications Verification LPS, from Serratia marcescens	Biochemical Assay Reagents
Lipopolysaccharides, from S. marcescens (Serratia marcescens) are lipopolysaccharide endotoxins and *TLR-4* activators derived from Serratia marcescens, classified as S-type LPS, which can activate pathogen-associated molecular patterns (PAMP) of the immune system and induce cellular secretion of migrasomes. Lipopolysaccharides, from S. marcescens exhibit a typical three-part structure: O-antigen (O-antigen), core oligosaccharide (core oligosaccharide), and lipid A (Lipid A). Lipopolysaccharides, from S. marcescens induce NF-κB activation in mouse cells via Toll-like receptor (TLR4)/MD-2. The lipopolysaccharides of S. marcescens can induce apoptosis in host immune cells, thereby suppressing the host's innate immunity . It is recommended to prepare a solution with concentration ≥2 mg/mL. Vortex thoroughly for more than 10 minutes. Due to the adsorption characteristics of LPS, silanized container or low adsorption centrifuge tubes should be used for aliquoting and storage, and mix thoroughly before use.

Lipopolysaccharides, from S. marcescens

1 Publications Verification

LPS, from Serratia marcescens

Biochemical Assay Reagents

Lipopolysaccharides, from S. marcescens (Serratia marcescens) are lipopolysaccharide endotoxins and TLR-4 activators derived from Serratia marcescens, classified as S-type LPS, which can activate pathogen-associated molecular patterns (PAMP) of the immune system and induce cellular secretion of migrasomes. Lipopolysaccharides, from S. marcescens exhibit a typical three-part structure: O-antigen (O-antigen), core oligosaccharide (core oligosaccharide), and lipid A (Lipid A). Lipopolysaccharides, from S. marcescens induce NF-κB activation in mouse cells via Toll-like receptor (TLR4)/MD-2. The lipopolysaccharides of S. marcescens can induce apoptosis in host immune cells, thereby suppressing the host's innate immunity .
It is recommended to prepare a solution with concentration ≥2 mg/mL. Vortex thoroughly for more than 10 minutes. Due to the adsorption characteristics of LPS, silanized container or low adsorption centrifuge tubes should be used for aliquoting and storage, and mix thoroughly before use.

Cat. No.	Product Name	Target	Research Area

HY-P11580

Pap12-6-10	Toll-like Receptor (TLR) Bacterial	Infection
Pap12-6-10 is an MD-2 ligand that binds to the hydrophobic pocket of MD-2 to inhibit the dimerization of the *TLR4/MD-2* complex and downstream inflammatory signal transduction. Pap12-6-10 also binds to LPS to permeabilize bacterial cell membranes and induce oxidative stress, leading to bacterial death. Pap12-6-10 regulates LPS-induced inflammatory responses through the TLR4 signaling pathway and exhibits antibacterial activity against multidrug-resistant Gram-negative bacteria. Pap12-6-10 shows low tendency to induce drug resistance and low preclinical cytotoxicity, and it prevents organ damage in a mouse model of sepsis. Pap12-6-10 can be used for research related to Gram-negative sepsis and carbapenem-resistant Acinetobacter baumannii infections .

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-N0795

Procyanidin B1 Maximum Cited Publications 7 Publications Verification	Flavonoids other families Functional Molecules Classification of Application Fields Research of Health Products Phenols Polyphenols Plants Biflavones Inflammation/Immunology Disease Research Fields Source Classification	Toll-like Receptor (TLR)
Procyanidin B1 is a polyphenolic flavonoid isolated from commonly eaten fruits, binds to *TLR4/MD-2* complex, and has anti-inflammatory activity.

HY-N2345

Procyanidin B3 1 Publications Verification	Flavonoids other families Functional Molecules Classification of Application Fields Research of Health Products Phenols Polyphenols Plants Biflavones Disease Research Fields Source Classification Cancer	Histone Acetyltransferase Toll-like Receptor (TLR) Androgen Receptor
Procyanidin B3 is a natural product with antioxidant activity and oral bioavailability, possessing good blood-brain barrier penetration. Procyanidin B3 is a selective inhibitor of histone acetyltransferase (HAT). By inhibiting p300 HAT-mediated acetylation of the androgen receptor (androgen receptor). Procyanidin B3 alleviates intervertebral disc degeneration (IVDD) by inhibiting the formation of the *TLR4/MD-2* complex. Procyanidin B3 can be used in research on prostate cancer and arthritis .

HY-N9347

Stepharine 3 Publications Verification	Cardiovascular Disease Alkaloids other families Classification of Application Fields Plants Isoquinoline Alkaloids Disease Research Fields Source Classification	Toll-like Receptor (TLR)
Stepharine, an natural alkaloid, directly interactes with *TLR4* and binds to the TLR4/MD2 complex (TLR4 inhibitor). Stepharine possesses anti-aging, anti-viral and anti-hypertensive effects .

HY-N16021

4A-MPLA ammonium	Structural Classification Lipid	Toll-like Receptor (TLR) Cdc42-binding kinase Galectin
4A-MPLA ammonium is an orally active *TLR4* agonist. 4A-MPLA ammonium induces TLR4 endocytosis dependent on *Cdc42* and galectin-3, triggering TRIF-mediated signaling and sustained IFN-β production. 4A-MPLA ammonium promotes lipid droplet formation, upregulates interferon-stimulated genes and type I IFN signaling genes, downregulates lysosome/phagosome function genes, and modulates tolerogenic dendritic cell function. 4A-MPLA ammonium can be used for the research of colitis .

HY-N0795R

Procyanidin B1 (Standard)	Structural Classification Flavonoids other families Phenols Polyphenols Plants Biflavones Source Classification	Reference Standards Toll-like Receptor (TLR)
Procyanidin B1 (Standard) is the analytical standard of Procyanidin B1. This product is intended for research and analytical applications. Procyanidin B1 is a polyphenolic flavonoid isolated from commonly eaten fruits, binds to TLR4/MD-2 complex, and has anti-inflammatory activity.

HY-N2345R

Procyanidin B3 (Standard)	Structural Classification Flavonoids other families Phenols Polyphenols Plants Biflavones Source Classification	Reference Standards Histone Acetyltransferase Toll-like Receptor (TLR) Androgen Receptor
Procyanidin B3 (Standard) is the analytical standard of Procyanidin B3. This product is intended for research and analytical applications. Procyanidin B3 is a natural product with antioxidant activity and oral bioavailability, possessing good blood-brain barrier penetration. Procyanidin B3 is a selective inhibitor of histone acetyltransferase (HAT). By inhibiting p300 HAT-mediated acetylation of the androgen receptor (androgen receptor). Procyanidin B3 alleviates intervertebral disc degeneration (IVDD) by inhibiting the formation of the TLR4/MD-2 complex. Procyanidin B3 can be used in research on prostate cancer and arthritis .

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TLR4-MD2

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