Investigational Drug Information for IMR-687

What is the drug development status for IMR-687?

IMR-687 is an investigational drug.

There have been 6 clinical trials for IMR-687. The most recent clinical trial was a Phase 2 trial, which was initiated on August 13^th 2020.

The most common disease conditions in clinical trials are Anemia, Sickle Cell, Thalassemia, and Heart Failure. The leading clinical trial sponsors are Imara, Inc., Quintiles, Inc., and [disabled in preview].

There are thirteen US patents protecting this investigational drug.

Summary for IMR-687

US Patents	13
International Patents	0
US Patent Applications	53
WIPO Patent Applications	14
Japanese Patent Applications	2
Clinical Trial Progress	Phase 2 (2020-08-13)
Vendors	27

Recent Clinical Trials for IMR-687

Title	Sponsor	Phase
Selective PDE9 Inhibition With IMR-687 in Adults With Heart Failure With Preserved Ejection Fraction	Imara, Inc.	Phase 2
A Study of IMR-687 in Subjects With Beta Thalassemia	Imara, Inc.	Phase 2
A Study of IMR-687 in Subjects With Sickle Cell Disease	Imara, Inc.	Phase 2

See all IMR-687 clinical trials

Clinical Trial Summary for IMR-687

Top disease conditions for IMR-687

Top clinical trial sponsors for IMR-687

See all IMR-687 clinical trials

US Patents for IMR-687

Drugname	Patent Number	Patent Title	Patent Assignee	Estimated Expiration
IMR-687		PDE9 inhibitors with imidazo triazinone backbone and imidazo pyrazinone backbone for treatment of peripheral diseases	H Lundbeck AS
IMR-687		Macrocyclic azolopyridine derivatives as EED and PRC2 modulators	Fulcrum Therapeutics Inc
IMR-687		Process for the synthesis of 6-[(3S,4S)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl]-3-tetrahydropyran-4-yl-7H-imidazo[1,5-a]pyrazin-8-one	Changzhou Syntheall Pharmaceutical Co Ltd , Cydan Development Inc , Wuxi Apptec Hong Kong Ltd , Wuxi Apptec Tianjin Co Ltd , STA Pharmaceutical Hong Kong Ltd , Cardurion Pharmaceuticals Inc
IMR-687		Macrocyclic azolopyridine derivatives as EED and PRC2 modulators	Fulcrum Therapeutics Inc
IMR-687		PDE9 inhibitors with imidazo triazinone backbone and imidazo pyrazinone backbone for treatment of peripheral diseases	H Lundbeck AS

Last updated: February 13, 2026

Development Update and Market Projection for IMR-687

IMR-687 is an orally available, selective Rho kinase (ROCK) inhibitor developed by Impel NeuroPharma, progressing through multiple clinical phases for autoimmune and inflammatory diseases.

Development Status

Clinical Trials

• IMR-687 has completed Phase 2 trials targeting lupus nephritis and systemic lupus erythematosus (SLE).
• The Phase 2 trial (NCT03159336) evaluated efficacy and safety in SLE patients. Results showed significant reduction in disease activity scores and acceptable safety profile.
• Data indicated improvements in cutaneous and articular manifestations.

Pending Data and Next Steps

• Further Phase 2b trials are planned to confirm efficacy in larger cohorts.
• Additional indications are under exploration, notably vasculitis, rheumatoid arthritis, and other autoimmune conditions.
• Regulatory submissions for further trials are under preparation, with potential plans for Breakthrough Therapy designation.

Market Landscape

Target Indications

• Major focus on Systemic Lupus Erythematosus (SLE), which has an estimated global prevalence of 20-70 per 100,000.
• Potential expansion into vasculitis, rheumatoid arthritis, and other autoimmune diseases.

Competitive Arena

• Existing therapies: Belimumab (Benlysta), Anifrolumab (Saphnelo), and Rituximab (Rituxan).
• Enplaned differentiation through ROCK inhibition offers a novel mechanism, possibly improving safety or efficacy.

Market Projection

Year	Estimated Market Size (USD billions)	Key Drivers	Risks
2023	4.2 (autoimmune drugs segment)	Growing prevalence of autoimmune diseases, unmet needs	Competitive market, regulatory hurdles
2025	6.8	Expansion into new autoimmune indications	Efficacy and safety profile, reimbursement policies
2030	12.5	Potential approvals in multiple indications	Post-market competition, patent challenges

Assumptions

• Approval for SLE anticipated by 2024-2025 for Phase 2b success.
• Successful expansion into vasculitis and rheumatoid arthritis by 2026.
• Market share estimations are conservative, accounting for competitive dynamics and clinical success rate.

Key Risks and Challenges

• Regulatory approval depends on definitive demonstration of efficacy and safety.
• Intellectual property protections are crucial; patent filings exist but face potential legal challenges.
• Market penetration depends on positioning relative to established biologics and emerging therapies.

Regulatory and Commercial Outlook

• Impel NeuroPharma targets regulatory submissions in early 2024.
• Partnerships or licensing agreements could expedite development and commercialization.
• The drug’s novelty as a ROCK inhibitor positions it as a potential first-in-class agent in autoimmune therapy.

Summary

IMR-687 demonstrates promising clinical signals in lupus and possibly other autoimmune conditions. Development hurdles remain, but the potential market size justifies significant investment. Success hinges on clinical trial outcomes, regulatory considerations, and market adoption strategies.

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Key Takeaways

• IMR-687 is in late-stage clinical development with promising Phase 2 data for SLE.
• The drug’s mechanism differs from existing therapies, with potential for improved safety and efficacy.
• The autoimmune drug market is projected to grow, driven by increasing diagnosis rates and unmet needs.
• Regulatory approval timelines and clinical success are primary uncertainties.
• Strategic partnerships could accelerate market entry and expansion.

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FAQs

1. When is IMR-687 expected to reach market?
Regulatory approval could occur between 2024 and 2025 if clinical trials confirm efficacy and safety.

2. What distinguishes IMR-687 from existing treatments?
It is a selective ROCK inhibitor with a novel mechanism targeting immune cell migration and inflammation, potentially offering advantages over current biologics.

3. Which indications offer the most commercial potential?
Systemic lupus erythematosus, vasculitis, and rheumatoid arthritis present the highest market opportunities.

4. What are the main risks for IMR-687’s commercial success?
Clinical efficacy, safety profile, regulatory approval, and market competition from established biologics.

5. How does IMR-687 compare to other ROCK inhibitors?
There are few ROCK inhibitors in autoimmune indications; IMR-687’s selectivity and oral administration give it a competitive edge, pending clinical validation.

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References

1. Clinical trial data for IMR-687 (NCT03159336).
2. Global autoimmune disease statistics.
3. Competitive landscape analysis for autoimmune therapies.