Page last updated: 2024-10-24

neutrophil-mediated killing of fungus

Definition

Target type: biologicalprocess

The directed killing of a fungal cell by a neutrophil. [GOC:add, ISBN:0781765196]

Neutrophils, a type of white blood cell, are essential for the innate immune response against fungal infections. They employ a multifaceted arsenal of mechanisms to eliminate fungal invaders.

**1. Phagocytosis:** Neutrophils recognize and engulf fungal cells through pattern recognition receptors (PRRs) like Toll-like receptors (TLRs) and C-type lectin receptors (CLRs) that bind to fungal cell wall components such as chitin, glucans, and mannoproteins.

**2. Neutrophil Extracellular Traps (NETs):** Neutrophils can release NETs, a web-like structure composed of DNA, histones, and antimicrobial proteins. These NETs trap fungi, preventing their spread and facilitating their destruction.

**3. Oxidative Burst and Reactive Oxygen Species (ROS):** Upon encountering fungi, neutrophils undergo an oxidative burst, generating ROS like superoxide, hydrogen peroxide, and hypochlorous acid. These ROS damage fungal cell walls, membranes, and DNA, contributing to their death.

**4. Antimicrobial Peptides (AMPs):** Neutrophils release AMPs such as defensins and cathelicidins, which directly kill fungi by disrupting their cell membranes or interfering with essential metabolic processes.

**5. Degranulation:** Neutrophils release granules containing a variety of enzymes and antimicrobial proteins, including myeloperoxidase (MPO), elastase, and cathepsin G. These enzymes contribute to fungal cell lysis and degradation.

**6. Cytokine and Chemokine Production:** Neutrophils produce cytokines and chemokines that recruit other immune cells, such as macrophages and lymphocytes, to the site of infection. These cytokines also contribute to the inflammatory response, which helps to contain the fungal infection.

**7. Cooperation with Other Immune Cells:** Neutrophils collaborate with other immune cells, such as macrophages and dendritic cells, to enhance fungal killing and antigen presentation. This collaboration contributes to a more robust and specific immune response.

**8. Fungal Pathogen Specific Mechanisms:** The specific mechanisms of neutrophil-mediated fungal killing can vary depending on the fungal species. Some fungi, such as Candida albicans, can evade neutrophil killing by forming biofilms or switching to a yeast-like morphology. Other fungi, like Aspergillus fumigatus, produce melanin, which protects them from ROS and antimicrobial peptides.

**In summary, neutrophils utilize a diverse array of mechanisms, including phagocytosis, NET formation, ROS production, AMPs, degranulation, and cytokine production, to effectively target and eliminate fungal pathogens.**
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Proteins (1)

ProteinDefinitionTaxonomy
Neutrophil elastaseA neutrophil elastase that is encoded in the genome of human. [PRO:CNA, UniProtKB:P08246]Homo sapiens (human)

Compounds (83)

CompoundDefinitionClassesRoles
3,4-dichloroisocoumarin3,4-dichloroisocoumarin : A member of the class of isocoumarins that is isocoumarin substituted by chloro groups at positions 3 and 4. It is a serine protease inhibitor.isocoumarins;
organochlorine compound
geroprotector;
serine protease inhibitor
pimagedineaminoguanidine : A one-carbon compound whose unique structure renders it capable of acting as a derivative of hydrazine, guanidine or formamide.

pimagedine: diamine oxidase & nitric oxide synthase inhibitor; an advanced glycosylation end product inhibitor; used in the treatment of diabetic complications; structure
guanidines;
one-carbon compound
EC 1.14.13.39 (nitric oxide synthase) inhibitor;
EC 1.4.3.4 (monoamine oxidase) inhibitor
stallimycin
emodinemodin : A trihydroxyanthraquinone that is 9,10-anthraquinone which is substituted by hydroxy groups at positions 1, 3, and 8 and by a methyl group at position 6. It is present in the roots and barks of numerous plants (particularly rhubarb and buckthorn), moulds, and lichens. It is an active ingredient of various Chinese herbs.

Emodin: Purgative anthraquinone found in several plants, especially RHAMNUS PURSHIANA. It was formerly used as a laxative, but is now used mainly as a tool in toxicity studies.
trihydroxyanthraquinoneantineoplastic agent;
laxative;
plant metabolite;
tyrosine kinase inhibitor
7-amino-4-chloro-3-methoxy-2-benzopyran-1-oneisocoumarins
phenylmethylsulfonyl fluoridephenylmethanesulfonyl fluoride : An acyl fluoride with phenylmethanesulfonyl as the acyl group.

Phenylmethylsulfonyl Fluoride: An enzyme inhibitor that inactivates IRC-50 arvin, subtilisin, and the fatty acid synthetase complex.
acyl fluorideserine proteinase inhibitor
2-methylanthraquinone2-methylanthraquinone : An anthraquinone that is 9,10-anthraquinone in which the hydrogen at position 2 is substituted by a methyl group.

2-methylanthraquinone: form Morinda officinalis How.
anthraquinone
chrysophanic acidchrysophanic acid: RN given refers to parent cpd; structure in Merck, 9th ed, #2260

chrysophanol : A trihydroxyanthraquinone that is chrysazin with a methyl substituent at C-3. It has been isolated from Aloe vera and exhibits antiviral and anti-inflammatory activity.
dihydroxyanthraquinoneanti-inflammatory agent;
antiviral agent;
plant metabolite
physcionephyscion : A dihydroxyanthraquinone that is 9,10-anthraquinone bearing hydroxy substituents at positions 1 and 8, a methoxy group at position 3, and a methyl group at position 6. It has been widely isolated and characterised from both terrestrial and marine sources.

physcione: structure
dihydroxyanthraquinoneanti-inflammatory agent;
antibacterial agent;
antifungal agent;
antineoplastic agent;
apoptosis inducer;
hepatoprotective agent;
metabolite
bentranilbentranil : A benzoxazine that is 4H-3,1-benzoxazin-4-one substituted by a phenyl group at position 2. It is a postemergence herbicide used for the control of annual weeds in cereal crops, maize, and rice.benzoxazineherbicide
ng-nitroarginine methyl esterNG-Nitroarginine Methyl Ester: A non-selective inhibitor of nitric oxide synthase. It has been used experimentally to induce hypertension.alpha-amino acid ester;
L-arginine derivative;
methyl ester;
N-nitro compound
EC 1.14.13.39 (nitric oxide synthase) inhibitor
closantelclosantel : A racemate comprising equimolar amounts of (R)- and (S)-clostanel. An anthelmintic, it is used (as the dihydrate of the sodium salt) in veterinary medicine for the treatment of fluke and nematode infections.

closantel: structure

N-{5-chloro-4-[(4-chlorophenyl)(cyano)methyl]-2-methylphenyl}-2-hydroxy-3,5-diiodobenzamide : An aromatic amide resulting from the formal condensation of the carboxy group of 3,5-diiodosalicylic acid with the amino group of aniline substituted at positions 2, 4, and 5 by methyl, (4-chlorophenyl)(cyano)methyl, and methyl groups respectively.
aromatic amide;
monocarboxylic acid amide;
monochlorobenzenes;
nitrile;
organoiodine compound;
phenols
lovastatinlovastatin : A fatty acid ester that is mevastatin carrying an additional methyl group on the carbobicyclic skeleton. It is used in as an anticholesteremic drug and has been found in fungal species such as Aspergillus terreus and Pleurotus ostreatus (oyster mushroom).

Lovastatin: A fungal metabolite isolated from cultures of Aspergillus terreus. The compound is a potent anticholesteremic agent. It inhibits 3-hydroxy-3-methylglutaryl coenzyme A reductase (HYDROXYMETHYLGLUTARYL COA REDUCTASES), which is the rate-limiting enzyme in cholesterol biosynthesis. It also stimulates the production of low-density lipoprotein receptors in the liver.
delta-lactone;
fatty acid ester;
hexahydronaphthalenes;
polyketide;
statin (naturally occurring)
anticholesteremic drug;
antineoplastic agent;
Aspergillus metabolite;
prodrug
ursolic acidhydroxy monocarboxylic acid;
pentacyclic triterpenoid
geroprotector;
plant metabolite
epigallocatechin gallate(-)-epigallocatechin 3-gallate : A gallate ester obtained by the formal condensation of gallic acid with the (3R)-hydroxy group of (-)-epigallocatechin.

epigallocatechin gallate: a steroid 5alpha-reductase inhibitor and antimutagen in green tea (Camellia sinensis)
flavans;
gallate ester;
polyphenol
antineoplastic agent;
antioxidant;
apoptosis inducer;
geroprotector;
Hsp90 inhibitor;
neuroprotective agent;
plant metabolite
midesteinemidesteine: a cyclic thiolic neutrophil elastase inhibitor
n-benzyloxycarbonylphenylalanyl-valine
sivelestatsivelestat: inhibitor of neutrophil elastase; structure given in first sourceN-acylglycine;
pivalate ester
l 658758L 658758: structure & chemical name given in UD
e 64E 64: cysteine protease inhibitor of microbial origin, which inhibits cathepsin B (EC 3.4.22.1) and cathepsin L (EC 3.4.22.-)dicarboxylic acid monoamide;
epoxy monocarboxylic acid;
guanidines;
L-leucine derivative;
zwitterion
antimalarial;
antiparasitic agent;
protease inhibitor
4-methyoxybenzoyl-n-glycineN-acylglycine
l 659286L 659286: structure given in first source; RN given from Toxlit 6/89
foy 2514-(4-guanidinobenzoyloxy)phenylacetic acid: RN given refers to monomethanesulfonate
omega-n-methylarginineN(omega)-methyl-L-arginine : A L-arginine derivative with a N(omega)-methyl substituent.

omega-N-Methylarginine: A competitive inhibitor of nitric oxide synthetase.
amino acid zwitterion;
arginine derivative;
guanidines;
L-arginine derivative;
non-proteinogenic L-alpha-amino acid
l 738167L 738167: structure in first source
1-hydroxy-2-methylanthraquinone1-hydroxy-2-methyl-9,10-anthraquinone : A member of the class of hydroxyanthraquinones that is anthracene-9,10-dione substituted by a hydroxy group at position 1 and a methyl group at position 2. It has been isolated from the roots of Rubia yunnanensis.

1-hydroxy-2-methylanthraquinone: from root of Prismatomeris tetrandra
monohydroxyanthraquinoneplant metabolite
2-phenyl-1,2-benzisothiazol-3-(2h)-one2-phenyl-1,2-benzisothiazol-3-(2H)-one: structure given in first source; sulfur analog of ebselen
sb 203580imidazoles;
monofluorobenzenes;
pyridines;
sulfoxide
EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor;
EC 2.7.11.24 (mitogen-activated protein kinase) inhibitor;
geroprotector;
Hsp90 inhibitor;
neuroprotective agent
l 694,458DMP 777: structure given in first source
7-amino-3-(2-bromoethoxy)-4-chloroisocoumarin7-amino-3-(2-bromoethoxy)-4-chloroisocoumarin: RN & structure given in first source
ono 6818ONO 6818: structure in first source
2-(3-nitrophenyl)-3,1-benzoxazin-4-onebenzoxazine
bortezomibamino acid amide;
L-phenylalanine derivative;
pyrazines
antineoplastic agent;
antiprotozoal drug;
protease inhibitor;
proteasome inhibitor
propolin cnymphaeol A : A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy group at positions 5, 7, 3' and 4' and a geranyl group at position 6. Isolated from Macaranga tanarius and propolis collected in Okinawa, it exhibits radical scavenging activity.

propolin C: a PAK1 inhibitor; from Taiwanese propolis; structure in first source
4'-hydroxyflavanones;
tetrahydroxyflavanone
metabolite;
radical scavenger
N-(3-dibenzofuranyl)-4-morpholinecarboxamidedibenzofurans
(4-Methyl-2-oxochromen-7-yl) furan-2-carboxylatecoumarinsanticoronaviral agent
2-furancarboxylic acid (2-acetyl-1-benzothiophen-3-yl) estercarboxylic ester
(4-Methoxyphenyl)-(2-methylsulfanyl-6,7-dihydro-[1,4]dioxino[2,3-f]benzimidazol-3-yl)methanonebenzodioxineanticoronaviral agent
6-fluoro-2-phenyl-1,2-benzothiazol-3-onebenzothiazoles
6-fluoro-2-(2-methylphenyl)-1,2-benzothiazol-3-onebenzothiazoles
n(6)-(1-iminoethyl)lysineN(6)-acetimidoyl-L-lysine : An L-lysine derivative that is L-lysine in which one of the hydrogens attached to N(6) is substituted by an acetimidoyl groupL-lysine derivative;
non-proteinogenic L-alpha-amino acid
3-chloro-1-(4-methoxyphenyl)-4-(3-methyl-1-piperidinyl)pyrrole-2,5-dionemaleimides
telaprevircyclopentapyrrole;
cyclopropanes;
oligopeptide;
pyrazines
antiviral drug;
hepatitis C protease inhibitor;
peptidomimetic
2-bromo-6-[1,4-dioxa-8-azaspiro[4.5]decan-8-yl(oxo)methyl]-11-pyrido[2,1-b]quinazolinonepyridopyrimidine
N,N-dimethyl-3-(3-oxo-1,2-benzothiazol-2-yl)benzenesulfonamidesulfonamide
quercetin7-hydroxyflavonol;
pentahydroxyflavone
antibacterial agent;
antineoplastic agent;
antioxidant;
Aurora kinase inhibitor;
chelator;
EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor;
geroprotector;
phytoestrogen;
plant metabolite;
protein kinase inhibitor;
radical scavenger
apigeninChamomile: Common name for several daisy-like plants (MATRICARIA; TRIPLEUROSPERMUM; ANTHEMIS; CHAMAEMELUM) native to Europe and Western Asia, now naturalized in the United States and Australia.trihydroxyflavoneantineoplastic agent;
metabolite
luteolin3'-hydroxyflavonoid;
tetrahydroxyflavone
angiogenesis inhibitor;
anti-inflammatory agent;
antineoplastic agent;
apoptosis inducer;
c-Jun N-terminal kinase inhibitor;
EC 2.3.1.85 (fatty acid synthase) inhibitor;
immunomodulator;
nephroprotective agent;
plant metabolite;
radical scavenger;
vascular endothelial growth factor receptor antagonist
clavulanic acidclavulanate : The conjugate base of clavulanic acid.

clavulanic acid : Antibiotic isolated from Streptomyces clavuligerus. It acts as a suicide inhibitor of bacterial beta-lactamase enzymes.

Clavulanic Acid: A beta-lactam antibiotic produced by the actinobacterium Streptomyces clavuligerus. It is a suicide inhibitor of bacterial beta-lactamase enzymes. Administered alone, it has only weak antibacterial activity against most organisms, but given in combination with other beta-lactam antibiotics it prevents antibiotic inactivation by microbial lactamase.
oxapenamantibacterial drug;
anxiolytic drug;
bacterial metabolite;
EC 3.5.2.6 (beta-lactamase) inhibitor
amentoflavonebiflavonoid;
hydroxyflavone;
ring assembly
angiogenesis inhibitor;
antiviral agent;
cathepsin B inhibitor;
P450 inhibitor;
plant metabolite
robustaflavonerobustaflavone : A biflavonoid that is obtained by oxidative coupling of two molecules of apigenin resulting in a bond between positions C-3 of the hydroxyphenyl ring and C-6 of the chromene ring. Isolated from Thuja orientalis and Rhus succedanea it exhibits antioxidant, cytotoxic and anti-hepatitis B activity.

robustaflavone: bis-apigenin coupled at 6 and 3' positions; a potential non-nucleoside anti-hepatitis B agent;
biflavonoid;
hydroxyflavone;
ring assembly
anti-HBV agent;
antineoplastic agent;
antioxidant;
metabolite
camostat mesylatemethanesulfonate saltanti-inflammatory agent;
anticoronaviral agent;
antifibrinolytic drug;
antihypertensive agent;
antineoplastic agent;
antiviral agent;
serine protease inhibitor
benzyloxycarbonyl-phe-ala-fluormethylketonecathepsin B inhibitor : A cysteine protease inhibitor which inhibits cathepsin B (EC 3.4.22.1).
sb 258719
sb 271046SB 271046: 5-HT(6) receptor antagonist; structure in first source
N-(4-ethylphenyl)-3-(1-pyrrolyl)propanamideanilide
5-Chloro-3-pyridinyl 2-furoatecarboxylic esteranticoronaviral agent
rwj 68354
sb 223245
zd 8321ZD 8321: inhibits human leukocyte elastase; structure in first source
n-(3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl)-3-(2-((((1,1-dimethylethyl)amino)carbonyl)amino)-3,3-dimethyl-1-oxobutyl)-6,6-dimethyl-3-azabicyclo(3.1.0)hexan-2-carboxamideboceprevir : A synthetic tripeptide consisting of N-(tert-butylcarbamoyl)-3-methyl-L-valyl, a cyclopropyl-fused prolyl and 3-amino-4-cyclobutyl-2-oxobutanamide residues joined in sequence. Used for treatment of chronic hepatitis C virus genotype 1 infection.tripeptide;
ureas
antiviral drug;
hepatitis C protease inhibitor;
peptidomimetic
mdl 101146MDL 101146: orally active inhibitor of neutrophil elastase; structure in first source
2-(4-methoxyphenyl)-1,2-benzothiazol-3-onebenzothiazoles
2-(4-chlorophenyl)-1,2-benzothiazol-3-onebenzothiazoles
PF-00835231PF-00835231 : A primary alcohol resulting from the cleavage of the phosphate group of the prodrug PF-07304814. It is an inhibitor of SARS-CoV-1 and -2 main protease (3CLpro) and exhibits potent in vitro antiviral activity.aromatic ether;
indolecarboxamide;
L-leucine derivative;
primary alcohol;
pyrrolidin-2-ones;
secondary carboxamide
anticoronaviral agent;
drug metabolite;
EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor
2-(3-chlorophenyl)-1,2-benzothiazol-3-onebenzothiazoles
archazolid aarchazolid A: inhibits vacuolar-type ATPase; isolated from Archangium gephyra; structure in first source
archazolid barchazolid B: structure in first sourcemacrolide
5-fluoro-2-phenyl-1,2-benzothiazol-3-onebenzothiazoles
2-(2-fluorophenyl)-1,2-benzothiazol-3-onebenzothiazoles
lyngbyastatin 7lyngbyastatin 7: potent elastase inhibitor from Floridian marine cyanobacteria, Lyngbya spp.; structure in first source
mk-7009vaniprevir : An azamacrocyclic compound that is a hepatitis C virus (HCV) NS3/4A protease inhibitor which is approved for the treatment of hepatitis C virus infections in Japan.

vaniprevir: inhibits hepatitis C virus NS3/4a protease
azamacrocycle;
carbamate ester;
cyclopropanes;
N-sulfonylcarboxamide;
pyrrolidinecarboxamide
antiviral drug;
hepatitis C protease inhibitor
delanzomibC-terminal boronic acid peptide;
phenylpyridine;
secondary alcohol;
threonine derivative
antineoplastic agent;
apoptosis inducer;
proteasome inhibitor
bi 201335faldaprevir: inhibits hepatitis C virus NS3 protease
6-(3,5-difluoroanilino)-9-(2,2-difluoroethyl)-2-purinecarbonitrile6-aminopurines
e-6-o-p-coumaroyl scandoside methyl esterE-6-O-p-coumaroyl scandoside methyl ester: structure in first source
2-(3-oxo-1,2-benzothiazol-2-yl)-N-phenylacetamidebenzothiazoles
n-((5-(methanesulfonyl)pyridin-2-yl)methyl)-6-methyl-5-(1-methyl-1h-pyrazol-5-yl)-2-oxo-1-(3-(trifluoromethyl)phenyl)-1,2-dihydropyridine-3-carboxamideN-((5-(methanesulfonyl)pyridin-2-yl)methyl)-6-methyl-5-(1-methyl-1H-pyrazol-5-yl)-2-oxo-1-(3-(trifluoromethyl)phenyl)-1,2-dihydropyridine-3-carboxamide: structure in first source
4-hydroxy-6-methyl-2-pyrone4-hydroxy-6-methyl-2-pyrone: structure in first source2-pyranones
elasninelasnin: elastase inhibitor isolated from Streptomyces noboritoensis
rpx7009RPX7009: a beta-lactamase inhibitor; structure in first source
sulfated pentagalloylglucosidesulfated pentagalloylglucoside: structure in first source
N-[4-(6-chloro-5-nitro-1H-benzimidazol-2-yl)phenyl]acetamidebenzimidazoles