Nafamostat mesylate (FUT-175) | Serine Protease Inhibitor

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CAS No. :	82956-11-4
Formula :	C₂₁H₂₅N₅O₈S₂
M.W :	539.58
SMILES Code :	CS(=O)(O)=O.CS(=O)(O)=O.O=C(OC1=CC=C2C=C(C(N)=N)C=CC2=C1)C3=CC=C(NC(N)=N)C=C3
Synonyms :	FUT-175; Nafamostat (mesylate); Nafamastat
MDL No. :	MFCD00941430
InChI Key :	SRXKIZXIRHMPFW-UHFFFAOYSA-N
Pubchem ID :	5311180

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H302
Precautionary Statements:	P280-P305+P351+P338

human bronchial epithelial cells	25 µM	1 hour	Nafamostat significantly inhibited SARS-CoV-2 and MERS-CoV infection in human airway epithelial cells, suggesting it blocks viral entry by inhibiting cell surface serine proteases such as TMPRSS2.	PMC8406266
Calu-3 2B4 cells	2.2 nM (IC50)	1 hour	Nafamostat showed greater potency than camostat in inhibiting SARS-CoV-2 and MERS-CoV infection in Calu-3 2B4 cells.	PMC8406266
Bone marrow-derived macrophages	50 μM	6 hours	Inhibition of intracellular trypsin activity in macrophages, preventing NF-κB nuclear translocation	PMC6663074
Human tracheal epithelial cells (HTE)	10 μg/ml	72 hours	Pretreatment with nafamostat significantly reduced the titers of the pandemic and seasonal influenza viruses in HTE cells and decreased the secretion of inflammatory cytokines (e.g., IL-6 and TNF-α) in the supernatants of cells infected with the pandemic influenza virus.	PMC7753675
Human nasal epithelial cells (HNE)	10 μg/ml	72 hours	Pretreatment with nafamostat significantly reduced the titers of the pandemic and seasonal influenza viruses in HNE cells and decreased the secretion of inflammatory cytokines (e.g., IL-6 and TNF-α) in the supernatants of cells infected with the pandemic influenza virus.	PMC7753675
rat hippocampal CA1 pyramidal neurons	0.20 ± 0.04 µM (IC50)		To study the inhibitory effect of Nafamostat on NMDA receptors, the results showed an IC50 of 0.20 ± 0.04 μM, indicating a strong inhibitory effect.	PMC10649274

Rats	Spinal cord injury model	Intraperitoneal injection	10 mg/kg/day	Twice a day until 3 dpi or the endpoints of experiments	To evaluate the optimal administration time window of Nafamostat after spinal cord injury and its impact on functional recovery. The results showed that Nafamostat administration within 2-12 hours post-injury significantly improved motor function and nerve conduction, with the best effects observed at 8 and 12 hours post-injury.	PMC9287720
CD-1 mice	TLR7/8 agonist R848-induced virus-like illness model	Intravenous injection	3 mg/kg	Single injection, duration of 6 hours	To evaluate the anti-inflammatory effects of Nafamostat in a TLR7/8 agonist R848-induced virus-like illness model. Results showed that Nafamostat suppressed the hepatic inflammatory response, significantly reducing TNF and IFN-γ expression, but had no effect on lung or brain cytokine production. Additionally, Nafamostat restored the R848-induced depletion of circulating leukocytes.	PMC8734544
BALB/c mice	Asthma model	Intraperitoneal injection	20 mg/kg	30 minutes before each HDM challenge, for 6 weeks	To evaluate the effects of Nafamostat on airway hyperreactivity, inflammatory parameters, and gene expression in a mouse model of asthma. Results showed that Nafamostat significantly suppressed airway hyperreactivity in HDM-sensitized mice, reduced infiltration of eosinophils and lymphocytes into the airways, and lowered levels of pro-inflammatory compounds in the airway lumen. Additionally, Nafamostat dampened goblet cell hyperplasia and smooth muscle layer thickening in the lungs of HDM-sensitized animals.	PMC10160450
Mice	Ad5-hACE2 transduced mice and K18-hACE2 transgenic mice	intranasal administration	3 mg/kg	single dose, 2 hours before infection	Nafamostat significantly reduced SARS-CoV-2-induced weight loss, viral load, and mortality in Ad5-hACE2 transduced mice and K18-hACE2 transgenic mice, particularly when administered before infection.	PMC8406266
BALB/c mice	Influenza A virus infection model	Intraperitoneal injection	30 mg/kg/day	Once daily for 14 days	Nafamostat reduced the levels of the pandemic influenza virus in mouse lungs but did not improve survival rate or body weight reduction after infection.	PMC7753675
Mice	K18-hACE2 transgenic mice	Subcutaneous injection	20 mg/kg, 60 mg/kg, 100 mg/kg	Once daily for 5 days	To evaluate the protective efficacy of MDB-601a-NM against SARS-CoV-2 infection, results showed that 60 mg/kg and 100 mg/kg dose groups performed better in terms of weight loss and survival rate, and no viral replication was detected in brain tissue.	PMC10253381
Wistar rats	Spinal cord injury model	Intraperitoneal injection	10 mg/kg	Twice daily for 7 days	Nafamostat mesilate treatment significantly improved locomotion recovery after spinal cord injury, reduced inflammation and apoptosis, and promoted tissue preservation.	PMC6489917
rats	Sprague-Dawley rats	intravenous and intratracheal administration	10 mg/kg	single dose	Evaluate the pharmacokinetics and lung distribution of Nafamostat under different administration routes, finding that intratracheal administration had higher drug delivery and longer residual time in the lung lumen and tissue	PMC8468663

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CAS No.: 82956-11-4

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CAS No.: 82956-11-4

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Bio Calculators
Preparing Stock Solutions		1mg	5mg	10mg
Preparing Stock Solutions	1 mM 5 mM 10 mM	1.85mL 0.37mL 0.19mL	9.27mL 1.85mL 0.93mL	18.53mL 3.71mL 1.85mL
Dissolving Methods	Animal experiment Please choose the appropriate dissolution scheme according to your animal administration guide.For the following dissolution schemes, clear stock solution should be prepared according to in vitro experiments, and then cosolvent should be added in turn: in order to ensure the reliability of the experimental results, the clarified stock solution can be properly preserved according to the storage conditions; The working fluid for in vivo experiment is recommended to be prepared now and used on the same day; The percentage shown in front of the following solvent refers to the volume ratio of the solvent in the final solution; If precipitation or precipitation occurs in the preparation process, it can be assisted by heating and/or ultrasound. Protocol 1 Protocol 2

Precautionary Statements-General
Code	Phrase
P101	If medical advice is needed,have product container or label at hand.
P102	Keep out of reach of children.
P103	Read label before use
Prevention
Code	Phrase
P201	Obtain special instructions before use.
P202	Do not handle until all safety precautions have been read and understood.
P210	Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
P211	Do not spray on an open flame or other ignition source.
P220	Keep/Store away from clothing/combustible materials.
P221	Take any precaution to avoid mixing with combustibles
P222	Do not allow contact with air.
P223	Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P230	Keep wetted
P231	Handle under inert gas.
P232	Protect from moisture.
P233	Keep container tightly closed.
P234	Keep only in original container.
P235	Keep cool
P240	Ground/bond container and receiving equipment.
P241	Use explosion-proof electrical/ventilating/lighting/equipment.
P242	Use only non-sparking tools.
P243	Take precautionary measures against static discharge.
P244	Keep reduction valves free from grease and oil.
P250	Do not subject to grinding/shock/friction.
P251	Pressurized container: Do not pierce or burn, even after use.
P260	Do not breathe dust/fume/gas/mist/vapours/spray.
P261	Avoid breathing dust/fume/gas/mist/vapours/spray.
P262	Do not get in eyes, on skin, or on clothing.
P263	Avoid contact during pregnancy/while nursing.
P264	Wash hands thoroughly after handling.
P265	Wash skin thouroughly after handling.
P270	Do not eat, drink or smoke when using this product.
P271	Use only outdoors or in a well-ventilated area.
P272	Contaminated work clothing should not be allowed out of the workplace.
P273	Avoid release to the environment.
P280	Wear protective gloves/protective clothing/eye protection/face protection.
P281	Use personal protective equipment as required.
P282	Wear cold insulating gloves/face shield/eye protection.
P283	Wear fire/flame resistant/retardant clothing.
P284	Wear respiratory protection.
P285	In case of inadequate ventilation wear respiratory protection.
P231 + P232	Handle under inert gas. Protect from moisture.
P235 + P410	Keep cool. Protect from sunlight.
Response
Code	Phrase
P301	IF SWALLOWED:
P304	IF INHALED:
P305	IF IN EYES:
P306	IF ON CLOTHING:
P307	IF exposed:
P308	IF exposed or concerned:
P309	IF exposed or if you feel unwell:
P310	Immediately call a POISON CENTER or doctor/physician.
P311	Call a POISON CENTER or doctor/physician.
P312	Call a POISON CENTER or doctor/physician if you feel unwell.
P313	Get medical advice/attention.
P314	Get medical advice/attention if you feel unwell.
P315	Get immediate medical advice/attention.
P320
P302 + P352	IF ON SKIN: wash with plenty of soap and water.
P321
P322
P330	Rinse mouth.
P331	Do NOT induce vomiting.
P332	IF SKIN irritation occurs:
P333	If skin irritation or rash occurs:
P334	Immerse in cool water/wrap n wet bandages.
P335	Brush off loose particles from skin.
P336	Thaw frosted parts with lukewarm water. Do not rub affected area.
P337	If eye irritation persists:
P338	Remove contact lenses, if present and easy to do. Continue rinsing.
P340	Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P341	If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P342	If experiencing respiratory symptoms:
P350	Gently wash with plenty of soap and water.
P351	Rinse cautiously with water for several minutes.
P352	Wash with plenty of soap and water.
P353	Rinse skin with water/shower.
P360	Rinse immediately contaminated clothing and skin with plenty of water before removing clothes.
P361	Remove/Take off immediately all contaminated clothing.
P362	Take off contaminated clothing and wash before reuse.
P363	Wash contaminated clothing before reuse.
P370	In case of fire:
P371	In case of major fire and large quantities:
P372	Explosion risk in case of fire.
P373	DO NOT fight fire when fire reaches explosives.
P374	Fight fire with normal precautions from a reasonable distance.
P376	Stop leak if safe to do so. Oxidising gases (section 2.4) 1
P377	Leaking gas fire: Do not extinguish, unless leak can be stopped safely.
P378
P380	Evacuate area.
P381	Eliminate all ignition sources if safe to do so.
P390	Absorb spillage to prevent material damage.
P391	Collect spillage. Hazardous to the aquatic environment
P301 + P310	IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P301 + P312	IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P301 + P330 + P331	IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P302 + P334	IF ON SKIN: Immerse in cool water/wrap in wet bandages.
P302 + P350	IF ON SKIN: Gently wash with plenty of soap and water.
P303 + P361 + P353	IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P304 + P312	IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell.
P304 + P340	IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P304 + P341	IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
P307 + P311	IF exposed: call a POISON CENTER or doctor/physician.
P308 + P313	IF exposed or concerned: Get medical advice/attention.
P309 + P311	IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician.
P332 + P313	IF SKIN irritation occurs: Get medical advice/attention.
P333 + P313	IF SKIN irritation or rash occurs: Get medical advice/attention.
P335 + P334	Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.
P337 + P313	IF eye irritation persists: Get medical advice/attention.
P342 + P311	IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P370 + P376	In case of fire: Stop leak if safe to Do so.
P370 + P378	In case of fire:
P370 + P380	In case of fire: Evacuate area.
P370 + P380 + P375	In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion.
P371 + P380 + P375	In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion.
Storage
Code	Phrase
P401
P402	Store in a dry place.
P403	Store in a well-ventilated place.
P404	Store in a closed container.
P405	Store locked up.
P406	Store in corrosive resistant/ container with a resistant inner liner.
P407	Maintain air gap between stacks/pallets.
P410	Protect from sunlight.
P411
P412	Do not expose to temperatures exceeding 50 oC/ 122 oF.
P413
P420	Store away from other materials.
P422
P402 + P404	Store in a dry place. Store in a closed container.
P403 + P233	Store in a well-ventilated place. Keep container tightly closed.
P403 + P235	Store in a well-ventilated place. Keep cool.
P410 + P403	Protect from sunlight. Store in a well-ventilated place.
P410 + P412	Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF.
P411 + P235	Keep cool.
Disposal
Code	Phrase
P501	Dispose of contents/container to ...
P502	Refer to manufacturer/supplier for information on recovery/recycling

Physical hazards
Code	Phrase
H200	Unstable explosive
H201	Explosive; mass explosion hazard
H202	Explosive; severe projection hazard
H203	Explosive; fire, blast or projection hazard
H204	Fire or projection hazard
H205	May mass explode in fire
H220	Extremely flammable gas
H221	Flammable gas
H222	Extremely flammable aerosol
H223	Flammable aerosol
H224	Extremely flammable liquid and vapour
H225	Highly flammable liquid and vapour
H226	Flammable liquid and vapour
H227	Combustible liquid
H228	Flammable solid
H229	Pressurized container: may burst if heated
H230	May react explosively even in the absence of air
H231	May react explosively even in the absence of air at elevated pressure and/or temperature
H240	Heating may cause an explosion
H241	Heating may cause a fire or explosion
H242	Heating may cause a fire
H250	Catches fire spontaneously if exposed to air
H251	Self-heating; may catch fire
H252	Self-heating in large quantities; may catch fire
H260	In contact with water releases flammable gases which may ignite spontaneously
H261	In contact with water releases flammable gas
H270	May cause or intensify fire; oxidizer
H271	May cause fire or explosion; strong oxidizer
H272	May intensify fire; oxidizer
H280	Contains gas under pressure; may explode if heated
H281	Contains refrigerated gas; may cause cryogenic burns or injury
H290	May be corrosive to metals
Health hazards
Code	Phrase
H300	Fatal if swallowed
H301	Toxic if swallowed
H302	Harmful if swallowed
H303	May be harmful if swallowed