N-(1,3,4-Thiadiazolyl)nicotinamide Chemical Properties

Melting point:

291-293°C

Density 

1.500±0.06 g/cm3(Predicted)

storage temp. 

room temp

solubility 

DMSO: ≥8mg/mL

pka

6.78±0.50(Predicted)

form 

powder

color 

white to tan

Stability:

Stable for 2 years from date of purchase as supplied. Solutions in DMSO may be stored at -20° for up to 3 months.

Safety Information

Hazard Codes 

Xn

Risk Statements 

22

WGK Germany 

3

N-(1,3,4-Thiadiazolyl)nicotinamide Usage And Synthesis

Description

TGN-020 (51987-99-6) is an aquaporin 4 channel blocker, IC50?= 3.1 μM.1?Reduces ischemic cerebral edema in a mouse model of focal cerebral ischemia using MRI.2?TGN-020 increases regional cerebral blood flow as determined in wild-type and AQP-4 knockout mice.3? Reduces brain edema when administered after onset of ischemia in rat models.4

Chemical Properties

Off-White Solid

Uses

A thiadiazole derivative as antitumor agent.

Biochem/physiol Actions

TGN-020 is an inhibitor of Aquaporin 4 (AQP4), the most abundant water channel in brain. Aquaporins (AQPs) are water channels required for maintaining fluid homeostasis and enabling water movement across barrier membranes, but can enhance pathological cellular volume changes and cause edema in injury states. Pretreatment with the AQP4 inhibitor TGN-020 significantly reduced the volume of brain edema associated with ischemic injury in a mouse model of focal cerebral ischemia.

storage

Store at RT

References

[1] VINCENT J. HUBER  Tsutomu N  Mika Tsujita. Identification of Aquaporin 4 inhibitors using in vitro and in silico methods[J]. Bioorganic & Medicinal Chemistry, 2009, 17 1: Pages 411-417. DOI:10.1016/j.bmc.2007.12.040
[2] HIRONAKA IGARASHI. Pretreatment with a novel aquaporin 4 inhibitor, TGN-020, significantly reduces ischemic cerebral edema.[J]. Neurological Sciences, 2011, 32 1: 113-116. DOI:10.1007/s10072-010-0431-1
[3] HIRONAKA IGARASHI. Inhibition of aquaporin-4 significantly increases regional cerebral blood flow.[J]. Neuroreport, 2013, 24 6: 324-328. DOI:10.1097/wnr.0b013e32835fc827
[4] IONICA PIRICI. Inhibition of Aquaporin-4 Improves the Outcome of Ischaemic Stroke and Modulates Brain Paravascular Drainage Pathways.[J]. International Journal of Molecular Sciences, 2017, 19 1. DOI:10.3390/ijms19010046

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