Active constituents
The leaves of bacopa contain saponins, including the bacosides,2 3 4 which are thought responsible for the therapeutic
properties of the herb. In animal studies, both purified bacosides and extracts
of bacopa standardised for bacosides have been found to enhance a few aspects
of mental function and learning ability.5 6 7 Additional brain effects of
bacopa demonstrated in animal research include reduction of both anxiety and
depression.8 9
Biochemically, these nervous-system effects have been attributed to an
enhancement of the effects of the neurotransmitters acetylcholine
and,10 11 possibly,
serotonin or GABA (gamma aminobutyric acid).12 13
Bacopa extracts also appear to have significant anti-oxidant activity in
the brain,14 and other effects that may help protect brain
cells.15
Animal research has also reported that bacopa extracts can relax the muscles
that control the blood vessels, the intestine, and the airways of the
respiratory system,16 17 18 19 and can help both prevent and heal
ulcers in the stomach.20
References
1. [No author listed]. The Wealth of India: Raw Materials. II-B. New Delhi: Publications and Information Directorate, CSIR, 1950:2–3.
2. Chatterji
N, Rastorgi RP, Dhar ML. Chemical examination of Bacopa monniera Wettst. Part I:
isolation of chemical constituents. Indian J Chem 1963;1:212.
3. Rastogi
S, Pal R, Kulshreshtha DK. Bacoside A3—a triterpenoid saponin from Bacopa
monniera. Phytochemistry 1994;36:133–7.
4. Jain P, Kulshreshtha
DK. Bacoside A1, a minor saponin from Bacopa monniera. Phytochemistry
1993;33:449–51.
5. Singh HK, Dhawan BN.
Neuropsychopharmacological effects of the Ayurvedic nootropic Bacopa monniera
Linn. (Brahmi). Indian J Pharmacol 1997;29:S359–S365.
6. Singh HK,
Rastogi RP, Srimal RC, Dhawan BN. Effect of bacosides A and B on avoidance
responses in rats. Phytother Res 1988;2:70–5.
7. Singh HK, Dhawan
BN. Effect of Bacopa monniera Linn. (brahmi) extract on avoidance responses in
rat. J Ethnopharmacol 1982;5:205–14.
8. Bhattacharya SK, Ghosal S. Anxiolytic activity of a
standardized extract of Bacopa monniera—an experimental study. Phytomedicine
1998;5:77–82.
9. Sairam K, Dorababu M, Goel RK, Bhattacharya SK.
Antidepressant activity of standardized extract of Bacopa monniera in
experimental models of depression in rats. Phytomedicine 2002;9:207–11.
10. Stough C, Lloyd J, Clarke J, et al. The chronic effects of an extract
of Bacopa monniera (Brahmi) on cognitive function in healthy human subjects. Psychopharmacology 2001;156:481–4.
11. Bhattacharya SK, Kumar A, Ghosal S. Effect of Bacopa monniera on animal models of Alzheimer's disease and perturbed central
cholinergic markers of cognition in rats. In: Siva Sanka DV, ed. Molecular
Aspects of Asian Medicine. New York: PJD Publications, 2000.
12. Ganguly GK, Malhtora CL. Some
neuropharmacological and behavioral effects of an activefraction from Herpestis
monniera Linn (Brahmi). Indian J Physiol Pharmacol 1967;11:33–43.
13. Dey PK, Datta C. Effect of psychotropic phytochemicals on cerebral amino acid level.
Indian J Exp Biol 1966; 4:216–8.
14. Bhattacharya SK, Bhattacharya A, Kumar A, Ghosal S. Antioxidant
activity of Bacopa monniera in rat frontal cortex, striatum and hippocampus. Phytother
Res 2000;14:174–9.
15. Russo A, Borrelli F, Campisi A, et al. Nitric oxide-related toxicity
in cultured astrocytes: effect of Bacopa monniera. Life Sci 2003;73:1517–26.
16. Dar A, Channa S. Bronchodilatory and cardiovascular
effects of an ethanol extract of Bacopa monniera in anaesthetized rats. Phytomedicine
1997;4:319–23.
17. Dar A, Channa S. Relaxant effect of ethanol extract of
Bacopa monniera on trachea, pulmonary artery and aorta from rabbit and
guinea-pig. Phytother Res 1997;11:323–5.
18. Channa S, Dar A,
Yaqoob M, et al. Broncho-vasodilatory activity of fractions and pure
constituents isolated from Bacopa monniera. J Ethnopharmacol 2003;86:27–35.
19. Dar A, Channa S. Calcium antagonistic activity of Bacopa monniera on
vascular and intestinal smooth muscles of rabbit and guinea-pig. J
Ethnopharmacol 1999;66:167–74.
20. Sairam K, Rao CV, Babu MD, Goel RK. Prophylactic and
curative effects of Bacopa monniera in gastric ulcer models. Phytomedicine
2001;8:423–30.
21. [No author given]. Indian Herbal Pharmacopoeia, Volume
1. Worli, Mumbai: Indian Drug Manufacturers Association, 1998.
22. Singh HK, Dhawan BN. Neuropsychopharmacological effects of the
Ayurvedic nootropic Bacopa monniera Linn. (Brahmi). Indian J Pharmacol
1997;29:S359–S365.
23. Stough C, Lloyd J, Clarke J, et al. The chronic effects of an
extract of Bacopa monniera (Brahmi) on cognitive function in healthy human
subjects. Psychopharmacology 2001;156:481–4.