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bacterial multidrug resistance

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Bacterial (7) Beta-lactamase (1) Toll-like Receptor (TLR) (1)
By Research Areas:	Infection (7)

Inhibitors & Agonists

Screening Libraries

Biochemical Assay Reagents

Peptides

Targets Recommended: Bacterial P-glycoprotein BCRP

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-D0180

18-Crown-6-ether 18C6; 1,4,7,10,13,16-Hexaoxacyclooctadecane	Bacterial	Infection
18-Crown-6-ether is a type of crown ether compound and a specific structure dissociating agent. 18-Crown-6-ether can compete with K ⁺ for binding to G-quadruplexes, disrupting their stable structure to regulate the functions of related systems. 18-Crown-6-ether combines with K ⁺ and other metal ions to achieve precise ion transmembrane transport. 18-Crown-6-ether can act as an "susceptibility substrate" for the multi-drug efflux pump EmrE (a bacterial multidrug resistance transporter), ultimately inhibiting bacterial growth. 18-Crown-6-ether can be used in microcapsule controlled release and the research on developing antibacterial enhancers .

HY-149809

AcrB-IN-1	Bacterial	Infection
AcrB-IN-1 (Compound H6) is a potent AcrB inhibitor. AcrB-IN-1 can be used for the reversal of bacterial multidrug resistance .

HY-178952

Anti-infective agent 12	Bacterial	Infection
Anti-infective agent 12 (Compound A09) is a competitive inhibitor of type I signal peptidease (SPase I), with an IC₅₀ of 4.475 μM and a K_d of 16.3 μM. Anti-infective agent 12 has the ability to disrupt bacterial membranes and remove biofilms. Anti-infective agent 12 exhibits potent bactericidal activity against Gram-positive bacteria, with MIC values of 4, 4, 8, and 8 μg/mL for Staphylococcus aureus, Enterococcus faecalis, Enterococcus faecium, and Streptococcus suis, respectively. Anti-infective agent 12 remains effective against multi-drug resistant strains, but has weaker activity against Gram-negative bacteria (such as Escherichia coli and Salmonella), with MIC values > 64 μg/mL. Anti-infective agent 12 has low hemolytic activity and shows significant efficacy in mouse skin infection models .

HY-178504

Lug-15	Bacterial	Infection
Lug-15 is a rapid bactericidal agent. Lug-15 exhibits strong antibacterial activity against both Gram-positive and Gram-negative bacteria, including drug-resistant strains. Lug-15 rapidly kills bacteria primarily through membrane disruption and had a very low propensity to induce bacterial resistance. Lug-15 demonstrates low hemolytic toxicity and significant therapeutic potential in various infection models. Lug-15 can be used for research on combating infections caused by multi-drug resistant bacteria .

HY-158375

MBL-IN-4	Beta-lactamase Bacterial	Infection
MBL-IN-4 (compound 4b) is a MBL inhibitor with the IC₅₀ of 4.81 and 33 μM against IMP-1 and NDM-1 .

HY-W107077

INF55	Bacterial	Infection
INF55 is a NoA multidrug resistance pump inhibitor with the activity of inhibiting the NoA pump. The heterocomplex formed by INF55 combined with berberine shows the potential to combat the resistance of bacterial compounds. INF55 can enhance the antibacterial activity of berberine by reducing its efflux. The structural variants of INF55 can show different NoA inhibitory activities, thereby affecting the antibacterial effect of its corresponding heterocomplexes. Different derivatives of INF55 show similar activity in terms of antibacterial dose and effectiveness .

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

HY-L939

Antibacterial Lead-like compound library	10855 compounds
The rising prevalence of multidrug-resistant and extensively drug-resistant bacteria, combined with emerging resistance mechanisms and the limitations of existing antibacterial drugs, creates an urgent need for novel antibacterial agents. Antibacterial compound libraries serve as key tools to support antibacterial drug screening and development. This library features structurally diverse compounds, including small-molecule scaffolds and natural product derivatives, and exhibits diverse antibacterial mechanisms of action. For example, these compounds exert antibacterial effects by disrupting bacterial cell structures, interfering with bacterial metabolic processes, and inhibiting nucleic acid synthesis. The derivation of scaffold structures enhances their activity against drug-resistant bacteria and their selectivity against different types of bacteria. This library can be used for the high-throughput screening of novel antibacterial drug candidates and the identification of potent compounds against drug-resistant and multidrug-resistant bacteria. Additionally, it provides a reference for compound structural modification, enabling further in-depth research on the structure-activity relationships(SARs) of antibacterial drugs. It can also be applied to the exploration of bacterial resistance mechanisms and reversal strategies, as well as the discovery of antibacterial molecules that inhibit efflux pumps and restore drug susceptibility. The library contains 10855 structurally diverse drug-like compounds. Its core compound sources include analogs of known antifungal active moleculeswith a similarity score of ≥ 0.6. MCE has collected more than 1900 antibacterial molecules. All screened compounds conform to lead-like physicochemical properties, providing valuable support for the research and development of novel antibacterial drugs.

Antibacterial Lead-like compound library

10855 compounds

The rising prevalence of multidrug-resistant and extensively drug-resistant bacteria, combined with emerging resistance mechanisms and the limitations of existing antibacterial drugs, creates an urgent need for novel antibacterial agents. Antibacterial compound libraries serve as key tools to support antibacterial drug screening and development.

This library features structurally diverse compounds, including small-molecule scaffolds and natural product derivatives, and exhibits diverse antibacterial mechanisms of action. For example, these compounds exert antibacterial effects by disrupting bacterial cell structures, interfering with bacterial metabolic processes, and inhibiting nucleic acid synthesis. The derivation of scaffold structures enhances their activity against drug-resistant bacteria and their selectivity against different types of bacteria. This library can be used for the high-throughput screening of novel antibacterial drug candidates and the identification of potent compounds against drug-resistant and multidrug-resistant bacteria. Additionally, it provides a reference for compound structural modification, enabling further in-depth research on the structure-activity relationships(SARs) of antibacterial drugs. It can also be applied to the exploration of bacterial resistance mechanisms and reversal strategies, as well as the discovery of antibacterial molecules that inhibit efflux pumps and restore drug susceptibility.

The library contains 10855 structurally diverse drug-like compounds. Its core compound sources include analogs of known antifungal active moleculeswith a similarity score of ≥ 0.6. MCE has collected more than 1900 antibacterial molecules. All screened compounds conform to lead-like physicochemical properties, providing valuable support for the research and development of novel antibacterial drugs.

Cat. No.	Product Name	Type

HY-D0180

18-Crown-6-ether 18C6; 1,4,7,10,13,16-Hexaoxacyclooctadecane	Biochemical Assay Reagents
18-Crown-6-ether is a type of crown ether compound and a specific structure dissociating agent. 18-Crown-6-ether can compete with K ⁺ for binding to G-quadruplexes, disrupting their stable structure to regulate the functions of related systems. 18-Crown-6-ether combines with K ⁺ and other metal ions to achieve precise ion transmembrane transport. 18-Crown-6-ether can act as an "susceptibility substrate" for the multi-drug efflux pump EmrE (a bacterial multidrug resistance transporter), ultimately inhibiting bacterial growth. 18-Crown-6-ether can be used in microcapsule controlled release and the research on developing antibacterial enhancers .

18-Crown-6-ether

18C6; 1,4,7,10,13,16-Hexaoxacyclooctadecane

Biochemical Assay Reagents

18-Crown-6-ether is a type of crown ether compound and a specific structure dissociating agent. 18-Crown-6-ether can compete with K ⁺ for binding to G-quadruplexes, disrupting their stable structure to regulate the functions of related systems. 18-Crown-6-ether combines with K ⁺ and other metal ions to achieve precise ion transmembrane transport. 18-Crown-6-ether can act as an "susceptibility substrate" for the multi-drug efflux pump EmrE (a bacterial multidrug resistance transporter), ultimately inhibiting bacterial growth. 18-Crown-6-ether can be used in microcapsule controlled release and the research on developing antibacterial enhancers .

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 .

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BODIPY 493/503 purchased from MedChemExpress. Usage Cited in: Nat Commun. 2025 Feb 1;16(1):1241. [Abstract]

MedchemExpress Validation 01

Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature. Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature. Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature.

BODIPY 493/503 purchased from MedChemExpress. Usage Cited in: Nat Commun. 2025 Feb 1;16(1):1241. [Abstract]

MedchemExpress Validation 01

MedchemExpress Validation 03

Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred

MedchemExpress Validation 04

MedchemExpress Validation

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