Antitubercular effect of 8-[(4-Chloro phenyl) sulfonyl]-7-Hydroxy-4-Methyl-2H-chromen-2-One in guinea pigs.
OBJECTIVE
TO EVALUATE THE ANTITUBERCULAR EFFICACY AND SAFETY OF NEW CHEMICAL ENTITY (NCE): 8-[(4-Chloro phenyl) sulfonyl]-7-Hydroxy-4-Methyl-2H-chromen-2-One (CSHMC) in guinea pigs.


METHODS
This pilot study was carried out in guinea pigs. They were infected with M. tuberculosis H(37)Rv (1.5 × 10(4) cfu/guinea pig) via intramuscular route. After 30 days, infections were confirmed in 6 guinea pigs by histopathology of spleen, lung, and liver. After that CSHMC (5 and 20 mg/kg) was administered for 1 month and its effect was compared with vehicle, rifampicin (60 mg/kg) and isoniazid (30 mg/kg). Efficacy of CSHMC was evaluated on the basis of histopathologic scoring of lesion in lung, spleen, liver, and safety on the basis of measuring hemogram, liver and renal function parameters.


RESULTS
Isoniazid, rifampicin, and CSHMC (20 mg/kg) significantly reduce the median lesion score in lung, spleen, and liver as compared to disease control group. Reduction in median lesion score for lung and spleen were not statistically significant for CSHMC 5 mg/kg. CSHMC (20 and 5 mg/kg) did not produce any changes in hemogram, liver and renal function parameters with respect to normal values.


CONCLUSIONS
CSHMC had shown significant antitubercular efficacy comparable to isoniazid and rifampicin and did not show hematological, hepato- and nephrotoxicity.
Department of Pharmacology, Government Medical College, Bhavnagar, Gujarat, India.
Parvati B
PB
Patel
Tejas K
TK
Patel
Seema N
SN
Baxi
Hemangini R
HR
Acharya
Chandrabhanu
C
Tripathi