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5-HT5a

" in MedChemExpress (MCE) Product Catalog:

By Targets:	5-HT Receptor (16) Akt (3) Epigenetic Reader Domain (2) FOXO (2) GABA Receptor (2) Reference Standards (4) Ribosomal S6 Kinase (RSK) (2) Small Interfering RNA (siRNA) (2)
By Research Areas:	Cancer (5) Inflammation/Immunology (1) Metabolic Disease (1) Neurological Disease (14)
Oligonucleotides:	Rat Pre-designed siRNA Sets (1) Human Pre-designed siRNA Sets (1) siRNAs (2)

Inhibitors & Agonists

Oligonucleotides

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-103524

Valerenic acid 1 Publications Verification (-)-Valerenic Acid	GABA Receptor 5-HT Receptor	Neurological Disease
Valerenic acid ((-)-Valerenic Acid), a sesquiterpenoid, is an orally active positive allosteric modulator of GABA_A receptors. Valerenic acid is also a partial agonist of the 5-HT_5a receptor. Valerenic acid mediates anxiolytic activity via GABA_A receptors containing the β3 subunit. Valerenic acid also exhibits potent antioxidant properties .

HY-107836

Methiothepin mesylate 2 Publications Verification Metitepine mesylate; Ro 8-6837 mesylate	5-HT Receptor	Neurological Disease
Methiothepin (Metitepine) mesylate is a potent and non-selective 5-HT₂ receptor antagonist, with pK_ds of 7.10 (5-HT_1A), 7.28 (5HT_1B), 7.56 (5HT_1C), 6.99 (5HT_1D), 7.0 (5-HT_5A), 7.8 (5-HT_5B), 8.74 (5-HT₆), and 8.99 (5-HT₇), and pK_is of 8.50 (5HT_2A), 8.68 (5HT_2B), and 8.35 (5HT_2C).

HY-103100

SB-699551 1 Publications Verification	5-HT Receptor Epigenetic Reader Domain Akt Ribosomal S6 Kinase (RSK) FOXO	Neurological Disease Metabolic Disease Inflammation/Immunology Cancer
SB-699551 is a selective and brain penetrant 5-HT5A receptor antagonist with a pK_i of 8.2 nM. SB-699551 shows high selectivity over most other 5-HT receptor subtypes, dopamine receptors, and α1B adrenoceptor. SB-699551 disrupts Gαi/o-coupled and PI3K/AKT/mTOR signaling pathways, alters CREB, ATF1, AKT, PRAS40, S6K, and FOXO1 phosphorylation in breast tumor cells. SB-699551 can be used for the research of anxiety, breast cancer, and Alzheimer's disease .

HY-103142

AS19 1 Publications Verification	5-HT Receptor	Neurological Disease
AS19 is a potent, selective 5-HT₇ receptor agonist with an IC₅₀ value of 0.83 nM and a K_i of 0.6 nM. AS19 is selective for 5-HT₇ over 5-HT_1A, 5-HT_1B, 5-HT_1D, and 5-HT_5A receptors (K_is = 89.7 nM, 490 nM, 6.6 nM and 98.5 nM, respectively). AS19 enhances memory consolidation and reverses Scopolamine- or Dizocilpine-induced amnesia .

HY-135555

5-Carboxamidotryptamine 5-CT	5-HT Receptor	Neurological Disease
5-Carboxamidotryptamine (5-CT) is a *5-HT_1A, 5-HT_1B, 5-HT_1D, 5-HT_5A,* 5-HT₇ receptor agonist . 5-Carboxamidotryptamine has a K_i** value of 4.6 nM for cloned human 5-HT_5A receptor. 5-Carboxamidotryptamine causes a dose-dependent reduction in rectal temperature of mice .

HY-103524R

Valerenic acid (Standard) (-)-Valerenic Acid (Standard)	5-HT Receptor GABA Receptor Reference Standards	Neurological Disease
Valerenic acid (Standard) is the analytical standard of Valerenic acid. This product is intended for research and analytical applications. Valerenic acid ((-)-Valerenic Acid), a sesquiterpenoid, is an orally active positive allosteric modulator of GABA_A receptors. Valerenic acid is also a partial agonist of the 5-HT_5a receptor. Valerenic acid mediates anxiolytic activity via GABA_A receptors containing the β3 subunit. Valerenic acid also exhibits potent antioxidant properties .

HY-101009

Methiothepin maleate Metitepine maleate; Ro-8-6837 maleate	5-HT Receptor	Neurological Disease
Methiothepin maleate is a potent and non-selective 5-HT₂ receptor antagonist, with pK_ds of 7.10 (5-HT_1A), 7.28 (5HT_1B), 7.56 (5HT_1C), 6.99 (5HT_1D), 7.0 (5-HT_5A), 7.8 (5-HT_5B), 8.74 (5-HT₆), and 8.99 (5-HT₇), and pK_is of 8.50 (5HT_2A), 8.68 (5HT_2B), and 8.35 (5HT_2C).

HY-111491

Methiothepin Metitepine; Ro 8-6837	5-HT Receptor	Neurological Disease
Methiothepin (Metitepine; Ro 8-6837) is a potent and non-selective 5-HT₂ receptor antagonist, with pK_ds of 7.10 (5-HT_1A), 7.28 (5HT_1B), 7.56 (5HT_1C), 6.99 (5HT_1D), 7.0 (5-HT_5A), 7.8 (5-HT_5B), 8.74 (5-HT₆), and 8.99 (5-HT₇), and pK_is of 8.50 (5HT_2A), 8.68 (5HT_2B), and 8.35 (5HT_2C).

HY-RS06477

HTR5A Human Pre-designed siRNA Set A	Small Interfering RNA (siRNA)	Others
HTR5A Human Pre-designed siRNA Set A contains three designed siRNAs for HTR5A gene (Human), as well as a negative control, a positive control, and a FAM-labeled negative control.

HTR5A Human Pre-designed siRNA Set A HTR5A Human Pre-designed siRNA Set A

HY-RS06479

Htr5a Rat Pre-designed siRNA Set A	Small Interfering RNA (siRNA)	Others
Htr5a Rat Pre-designed siRNA Set A contains three designed siRNAs for Htr5a gene (Rat), as well as a negative control, a positive control, and a FAM-labeled negative control.

Htr5a Rat Pre-designed siRNA Set A Htr5a Rat Pre-designed siRNA Set A

HY-145700

UCSF648	5-HT Receptor	Neurological Disease
UCSF648 (Compound 5A6-48) is a chemical probe for the 5-HT_5A serotonin receptor. UCSF648 weakly activates ADRA2A and MTNR1A .

HY-145699

UCSF686	5-HT Receptor	Others
UCSF686 is a probe with which to study the function of the 5-HT_5AR. UCSF686 loses affinity at 5-HT_5AR (>10 000 nM) but not at 5-HT_1AR, 5-HT_2BR, and 5-HT₇R. UCSF686 controls for off-target effects .

HY-173045

5-HT5AR/5-HT6R ligand-1	5-HT Receptor	Cancer
5-HT5AR/5-HT6R ligand-1 (Compound PP10) is a ligand for serotonin receptors, showing high affinity for *5-HT_5A* and 5-HT₆ receptors, with K_i values of 59 nM and 96 nM, respectively. 5-HT5AR/5-HT6R ligand-1 exhibits certain antiproliferative activity against tumor cells and can be used in the study of cancer .

HY-107836R

Methiothepin mesylate (Standard) Metitepine mesylate (Standard); Ro 8-6837 mesylate (Standard)	5-HT Receptor Reference Standards	Neurological Disease
Methiothepin (mesylate) (Standard) is the analytical standard of Methiothepin (mesylate). This product is intended for research and analytical applications. Methiothepin (Metitepine) mesylate is a potent and non-selective 5-HT2 receptor antagonist, with pKds of 7.10 (5-HT1A), 7.28 (5HT1B), 7.56 (5HT1C), 6.99 (5HT1D), 7.0 (5-HT5A), 7.8 (5-HT5B), 8.74 (5-HT6), and 8.99 (5-HT7), and pKis of 8.50 (5HT2A), 8.68 (5HT2B), and 8.35 (5HT2C).

HY-182695

AS2030680	5-HT Receptor	Neurological Disease Cancer
AS2030680 is a blood-brain barrier-permeable, orally active *5-HT5A* receptor antagonist. AS2030680 regulates *5-HT5A*-related downstream signaling pathways, reduces the frequency of tumorsphere-initiating cells in breast cancer cells, and exerts procognitive activity in animal models. AS2030680 can be used to study cognitive impairments associated with dementia and schizophrenia, as well as breast cancer .

HY-136700

SB-699551 free base	5-HT Receptor Akt	Neurological Disease Cancer
SB-699551 free base is a selective and brain penetrant 5-HT5A receptor antagonist with a pK_i of 8.2 nM. SB-699551 free base shows high selectivity over most other 5-HT receptor subtypes, dopamine receptors, and α1B adrenoceptor. SB-699551 free base disrupts Gαi/o-coupled and PI3K/AKT/mTOR signaling pathways, alters CREB, ATF1, AKT, PRAS40, S6K, and FOXO1 phosphorylation in breast tumor cells. SB-699551 free base can be used for the research of anxiety, breast cancer, and Alzheimer's disease .

HY-103100R

SB-699551 (Standard)	Reference Standards 5-HT Receptor Epigenetic Reader Domain Akt Ribosomal S6 Kinase (RSK) FOXO	Neurological Disease Cancer
SB-699551 (Standard) is the analytical standard of SB-699551 (HY-103100). This product is intended for research and analytical applications. SB-699551 is a potent and selective 5-HT5A antagonist with a K_i value of 5.1 μM. SB-699551 increases the phosphorylation levels of CREB and ATF1, and decreases the phosphorylation levels of AKT, PRAS40, P70S6K, FOXO1, and S6RP. SB-699551 improves drug-induced cognitive deficits. SB-699551 improves social withdrawal and forgetfulness. SB-699551 inhibits breast cancer.

HY-103142R

AS19 (Standard)	Reference Standards 5-HT Receptor	Neurological Disease
AS19 (Standard) is the analytical standard of AS19 (HY-103142). This product is intended for research and analytical applications. AS19 is a potent, selective 5-HT7 receptor agonist with an IC₅₀ value of 0.83 nM and a K_i of 0.6 nM. AS19 is selective for 5-HT7 over 5-HT1A, 5-HT1B, 5-HT1D, and 5-HT5A receptors (Kis = 89.7 nM, 490 nM, 6.6 nM and 98.5 nM, respectively). AS19 enhances memory consolidation and reverses Scopolamine- or Dizocilpine-induced amnesia .

HTR5A Human Pre-designed siRNA Set A		siRNAs Human Pre-designed siRNA Sets
HTR5A Human Pre-designed siRNA Set A contains three designed siRNAs for HTR5A gene (Human), as well as a negative control, a positive control, and a FAM-labeled negative control.

Htr5a Rat Pre-designed siRNA Set A		siRNAs Rat Pre-designed siRNA Sets
Htr5a Rat Pre-designed siRNA Set A contains three designed siRNAs for Htr5a gene (Rat), as well as a negative control, a positive control, and a FAM-labeled negative control.

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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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