- Created on the 23 February, 2017.
Alpha-amylase (α-amylase) which also has alternate names of 1,4-α-D-glucan glucanohydrolase and glycogenase, is a digestive enzyme which is responsible for breaking down starch to maltose, this can be carried out by hydrolysing alpha-1,4 bonds of large polysaccharides such as starch and glycogen and yielding smaller by-products such as glucose and maltose. Alpha amylase is predominately synthesised in the acinar cells of the saliva glands and can be stored in secretory granules inside the cells. Since it has the ability to act anywhere on the substrate, α-amylase is found to be faster acting when compared to than β-amylase. In animals, it functions as the major digestive enzyme which requires an optimum pH is 6.7–7.0. It must also be noted that the salivary α-amylase levels are not related to α-amylase levels that are present in the blood, which are derived from pancreatic secretion.
In addition to its digestive function, it can also play vital anti-bacterial roles in the oral cavities and for this reason alone it can be stored at much lower levels in non-stimulated saliva between meals. However, the release of α-amylase by salivary cells can be greatly increased in response to the chewing motions of the jaw or taste. Alpha-amylase production by saliva glands can be elevated in response to physical and psychological stress via interactions with the autonomic nervous system.
Salivary α-amylase exhibits a diurnal rhythm, displaying a pronounced decrease within an hour of waking up, followed by a steady increase in its activity throughout the course of the day. Salivary alpha-amylase has been found to be related with post-traumatic stress disorder, chronic stress, behaviour, health and cognitive function. Also, salivary α-amylase increases can be prevented by beta-blockade (like propanolol) or elicited by SNS activating drugs (like yohimbine). The determination of salivary alpha-amylase levels has been helpful as biomarkers of ANS activity in various fields of bio-behavioural research.
Alpha amylase saliva ELISA kit is an accurate in vitro quantitative method for detecting alpha-amylase (α-amylase) in human saliva samples. This assay has a minimum sensitivity detection limit of 3.6 U/ml.
The minimum sensitivity detection limit of alpha-amylase (α-amylase) using this human alpha amylase saliva ELISA kit was approximately 3.6 U/ml. The dynamic assay range for this kit is 10.0 – 50.0 U/ml.
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- Salivary amylase – The enzyme of unspecialized euryphagous animals. Arch Oral Biol. (2015) 60 (8): 1162-76. Review. Boehlke C., et al.
- Increased salivary immunoglobulin A and reduced α-amylase activity in whole saliva from spastic cerebral palsy individuals. J Oral Pathol Med. (2013) 42 (6): 480-5. Leite M.F., et al.
- Salivary alpha-amylase in biobehavioral research: recent developments and applications. Ann N Y Acad Sci. (2007) 1098: 122-44. Review. Granger D.A., et al.
- Determinants of salivary alpha-amylase in humans and methodological considerations. Psychoneuroendocrinology. (2009) 34 (4): 469-85. Review. Rohleder N. and Nater U.M.
- Full Name: Alpha Amylase Saliva ELISA Kit
- Reactivity: Human
- Sample Type: Saliva
- Sensitivity: 3.6 U/ml