Date published: 2025-12-24

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OR4D5 Inhibitors

OR4D5 inhibitors encompass a variety of compounds that can impede the olfactory transduction process by inhibiting the ion channels important for neuronal activation and signal propagation. Quinidine and tetrodotoxin, by blocking voltage-gated sodium channels, can prevent the depolarization required to initiate an action potential in olfactory sensory neurons, hence inhibiting the functional activity of OR4D5. Ruthenium Red and conotoxins (including both generic and omega-conotoxin) target calcium channels, which are crucial for the olfactory signal transduction cascade that OR4D5 participates in. The disruption of calcium-mediated signaling by these inhibitors can reduce OR4D5's role in olfactory perception. Other inhibitors, such as lidocaine and hexamethonium, act on neuronal conduction pathways. Lidocaine's sodium channel blockade and hexamethonium's antagonistic effects on nicotinic acetylcholine receptors can decrease neuronal excitability, which would indirectly diminish OR4D5 signaling. Bicuculline, through its antagonistic action on GABA_A receptors, can influence neuronal activity levels, which are necessary for OR4D5 function. Inhibition of calcium channels by compounds such as cobalt(II) chloride, manganese(II) chloride, and amlodipine could impede the calcium influx needed for OR4D5 to contribute to the olfactory signaling process. Lastly, carbenoxolone, by hindering gap junction communication, could obstruct the cell-to-cell coordination in olfactory neurons, potentially reducing the collective effectiveness of OR4D5 in signal transmission.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Quinidine

56-54-2sc-212614
10 g
$102.00
3
(1)

As a known blocker of voltage-gated sodium channels, quinidine can inhibit action potentials in olfactory sensory neurons. Inhibition of these action potentials would prevent the initiation of the signaling cascade that OR4D5 relies on to translate a chemical stimulus into an electrical response.

Ruthenium red

11103-72-3sc-202328
sc-202328A
500 mg
1 g
$184.00
$245.00
13
(1)

This compound is an inhibitor of many calcium channels and can interfere with the calcium-mediated signaling that is essential for the function of OR4D5 in olfactory transduction.

Lidocaine

137-58-6sc-204056
sc-204056A
50 mg
1 g
$50.00
$128.00
(0)

Lidocaine is a sodium channel blocker that can inhibit neuronal conduction. By inhibiting these channels in olfactory neurons, lidocaine can reduce the functional activity of OR4D5 by preventing signal propagation.

Hexamethonium bromide

55-97-0sc-205712
sc-205712A
10 g
25 g
$45.00
$63.00
(0)

As a nicotinic receptor antagonist, hexamethonium can inhibit cholinergic neurotransmission. While not directly linked to OR4D5, it can affect the overall neuronal excitability, which could indirectly reduce the functional activity of OR4D5 in olfactory processing.

(+)-Bicuculline

485-49-4sc-202498
sc-202498A
50 mg
250 mg
$80.00
$275.00
(1)

Bicuculline, as a GABA_A receptor antagonist, can increase neuronal excitability. However, in excessive amounts, it can inhibit neuronal activity through overstimulation and desensitization, which could in turn reduce the activity of OR4D5.

Cobalt(II) chloride

7646-79-9sc-252623
sc-252623A
5 g
100 g
$63.00
$173.00
7
(1)

Cobalt(II) chloride can block calcium channels and, by doing so, it inhibits the calcium influx necessary for the activation of olfactory signal transduction pathways involving OR4D5.

Manganese(II) chloride beads

7773-01-5sc-252989
sc-252989A
100 g
500 g
$19.00
$30.00
(0)

Manganese ions can enter cells through calcium channels and subsequently inhibit them. This inhibition can disrupt calcium signaling in olfactory sensory neurons, potentially reducing OR4D5 activity.

Amlodipine

88150-42-9sc-200195
sc-200195A
100 mg
1 g
$73.00
$163.00
2
(1)

A known calcium channel blocker, amlodipine can inhibit the influx of calcium that would otherwise trigger the signaling cascade in olfactory neurons where OR4D5 is active.

Carbenoxolone

5697-56-3sc-507294
1 g
$50.00
(0)

Carbenoxolone is a gap junction inhibitor that can disrupt intercellular communication. In olfactory neurons, this disruption could impede the coordinated activity required for OR4D5 signaling.