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Serum Lactic Acid as a Prognostic Marker in Clinical Medicine | Abstract

Journal of Research in Medical and Dental Science
eISSN No. 2347-2367 pISSN No. 2347-2545

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Serum Lactic Acid as a Prognostic Marker in Clinical Medicine

Author(s): Praraj Jaiswal1*, Sachin Agrawal2, Sourya Acharya3, Sunil Kumar2, Vinisha Jaiswal4

Abstract

Body tissues under stresses, such as hypoxia, inflammation, sepsis, and shock, trauma, and organ failure resort to anaerobic
respiration under low oxygen availability. This prompts cells to resort to anaerobic respiration as a means of producing ATP.
Lactic acid is one of the by-products of anaerobic respiration. It is an anti-inflammatory agent and inhibits formation of
pro-inflammatory mediators such as interleukin 12 and TNF (Tumour Necrosis Factor) in tissues and increases formation of
interleukin 10 (Anti-Inflammatory). Therefore, it can be postulated that an increase in lactic acid levels in the blood can
indicate an increased level of inflammation in the body, since anti-inflammatory chemicals will be secreted in response to an
increase in inflammatory mediators. A prognostic marker is a biochemical used to measure the progress of a disease. Based
on the above hypothesis, one can measure lactic acid levels in conditions such as, sepsis, myocardial infarction,
trauma, diabetic ketoacidosis, malignancies etc. and use them as a prognostic marker to alter the course of treatment. This
article aims to explore the role of lactic acid as a prognostic biomarker based on current literature, emphasizing on patients
with cancer, with sepsis, and critically ill patients in Intensive Care Units (ICUs). Malignancy is an anabolic state causing
high oxygen demand and larger numbers of tissues undergo anaerobic glycolysis, thus causing an increase in lactic acid
levels. Sepsis causes the release of a high amount of inflammatory mediators which in turn raise the anti-inflammatory
chemicals such as lactic acid.

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