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Safety, tolerability and pharmacokinetics of open label sarcosine added on to anti-psychotic treatment in schizophrenia - preliminary study.

Author information

1
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel Chaim Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
2
Chaim Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
3
Nathan Klein Institute, Orangeburg, New York, U.S.A.

Abstract

BACKGROUND:

Hypofunction of NMDA receptor-mediated neurotransmission might play a critical role in schizophrenia. Sarcosine, N- methylglycine and inhibitor of the glycine transporter-1 (Gly-T1), has been suggested as a novel treatment for schizophrenia.

METHODS:

Open label sarcosine was added to 22 stabilized patients: 5 patients received 2 gm/d, and 17 received 4gm/d. Pharmacokinetics samples, clinical and cognitive parameters using PANSS, CGI and MCCB were collected for all patients.

RESULTS:

Significant improvement was observed after one week of treatment on PANSS sub-scale of 'positive symptoms' (Z= -2.68; P=0.007) and 'general psychopathology' (Z= -3.02; P=0.003), an improvement in PANSS total score and CGI-S showed a trend (Z= -2.72; P=0.06; Z=-2.69; P=0.08). Speed of processing (MCCB subscale) improved significantly (Z=-2.13; P=0.03). Sarcosine exhibited linear kinetics, with a Tmax and t½ of ~1½- 2½ hr and ~1hr, respectively.

LIMITATIONS:

This was a short period, open label pilot study with small sample size per dosage group.

CONCLUSIONS:

Sarcosine is a safe compound and might be efficacious in the treatment of schizophrenia.

PMID:
25841105
[Indexed for MEDLINE]
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