Takeda Pharmaceutical Company Limited

Shinichi Masada

Yoshito Terao

Naoki Miyamoto

Shumpei Murata

Toshiki Murata

Tadashi Umemoto

Provided is an oligonucleic acid analog which contains, as at least one structural unit thereof, a modified nucleic acid monomer compound which is a ring-open nucleoside having a cleaved carbon-carbon bond between the 2' and 3&#x2032; positions and a substituent hydroxymethyl group at the 4&#x2032; position. When used as siRNA, the oligonucleic acid analog exhibits superior biological stability and target gene expression inhibiting activity. The oligonucleic acid analog can be used in antisense methods, ribozyme methods, and decoy methods, etc., can be used as a nucleic acid aptamer, and can also be used as a nucleic acid probe or molecular beacon, etc., or in genetic diagnostics, etc.

Modified nucleic acid

The present invention provides an indole derivative having a melanin-concentrating hormone receptor antagonistic action, which is useful as an agent for the prophylaxis or treatment of obesity and the like. The present invention relates to a compound represented by the formula (I): wherein each symbol is as defined in the specification, or a salt thereof.

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Fujisawa, Japan

Shinichi Masada