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    Chemokine receptor 9 (CCR9), a cell surface chemokine receptor which belongs to the G protein-coupled receptor, 7-trans-membrane superfamily, is expressed on lymphocytes in the circulation and is the key chemokine receptor that enables these cells to target the intestine. It has been proposed that CCR9 antagonism represents a means to prevent the aberrant immune response of inflammatory bowel disease in a localized and disease specific manner and one which is accessible to small molecule approaches. One possible reason why clinical studies with vercirnon, a prototype CCR9 antagonist, were not successful may be due to a relatively poor pharmacokinetic (PK) profile for the molecule. We wish to describe work aimed at producing new, orally active CCR9 antagonists based on the 1,3-dioxoisoindoline skeleton. This study led to a number of compounds that were potent in the nanomolar range and which, on optimization, resulted in several possible preclinical development candidates with excellent PK properties.


    S Barret Kalindjian, Sanjay V Kadnur, Christopher A Hewson, Chandregowda Venkateshappa, Suresh Juluri, Rajendra Kristam, Bheemashankar Kulkarni, Zainuddin Mohammed, Rohit Saxena, Vellarkad N Viswanadhan, Jayashree Aiyar, Donna McVey. A New Series of Orally Bioavailable Chemokine Receptor 9 (CCR9) Antagonists; Possible Agents for the Treatment of Inflammatory Bowel Disease. Journal of medicinal chemistry. 2016 Apr 14;59(7):3098-111

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    PMID: 26987013

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