Herbal Salvia officinalis and Alzheimer's disease

Posted by Chantel Martiromo 

Alzheimer's disease is a brain disorder correlated with major reductions of neurons to the respective target areas and named after German physician Alois Alzheimer. Alzheimer's destroys brain cells, causing cognitive modalities severe enough to affect language communication, memory, lifelong hobbies or social life. Alzheimer's gets worse over time, and it is fatal. 
According to statistic, over 25 million people in the world today are affected by dementia and most are suffering from Alzheimer's disease. It may be results of  cigarette smoking, midlife high blood pressure and obesity, diabetes, and cerebrovascular lesions) and the possible beneficial roles of psychosocial factors (eg, high education, active social engagement, physical exercise, and mentally stimulating activity)(1) Strong evidences emerged in epidemiological studies suggested that certain herbs(2) may have potential in reduced risk and treatments of Alzheimer's disease but geographic source of the plant material, climatation, and time of harvest may effect their effectiveness. It is understandable that commercially available herbal medicinal products with the same herbal ingredients vary in their content and concentration of chemical constituents when compared between manufacturers.

Sage is a ornamental plant of the genus Salvia, belonging to family Lamiaceae, native to the Central and South America, Central, Eastern Asia and Mediterranean. The herb has been used in traditional medicine as carminative, antiperspirant, antispasmodic, astringent, antiseptic, and antibiotic agent and to calm the central nervous system, treat spasms in smooth and skeletal muscles, relieve digestive problems, regulate menstruation, etc.
According to the Northumbria University, extracts Salvia officinalis exerted its anti-oxidant, estrogenic, anti-inflammatory properties, to inhibited butyryl- and acetyl-cholinesterase (to prevent impeded neurotransmission)(27). Rosmarinic acid from Sage, in mild to moderate Alzheimer's disease (AD), enhanced the neuroprotective effect of sage against Abeta-induced toxicity, through inhibition of reactive oxygen species formation, lipid peroxidation, DNA fragmentation, caspase-3 activation(cell apoptosis), and tau protein hyperphosphorylation(neurofibrillary degeneration)(28).
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References
(1) Epidemiology of Alzheimer's disease: occurrence, determinants, and strategies toward intervention. by Qiu C, Kivipelto M, von Strauss E.(PubMed)
(2) The Use of Herbal Medicine in Alzheimer's Disease—A Systematic Review by Leopoldo Luiz dos Santos-Neto,¹ Maria Alice de Vilhena Toledo,² Patrícia Medeiros-Souza,³ and Gustavo Almeida de Souza(PubMed)
(27) The psychopharmacology of European herbs with cognition-enhancing properties by Kennedy DO, Scholey AB(PubMed)
(28) The spice sage and its active ingredient rosmarinic acid protect PC12 cells from amyloid-beta peptide-induced neurotoxicity by Iuvone T, De Filippis D, Esposito G, D'Amico A, Izzo AA(PubMed)