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Review Article | Open Access

Protective roles of inorganic nitrate in health and diseases

Lizheng Qin1,2,3, Songlin Wang1,2,4( )
Beijing Laboratory of Oral Health, Capital Medical University, Beijing 100069, China
Salivary Gland Disease Center and Molecular Laboratory for Gene Therapy & Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing 100050, China
Department of Oral and Maxillofacial & Head and Neck Oncology, School of Stomatology, Capital Medical University, Beijing 100050, China
Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
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Abstract

Various beneficial biological activities of inorganic nitrate have been revealed in recent decades. Oral bacteria can reduce nitrate to nitrite, which is further reduced to nitric oxide (NO) in the body; this process is known as the nitrate-nitrite-NO pathway. Sialin is a mammalian membrane nitrate transporter that transports nitrate to the salivary glands and secretes it into the oral cavity through the saliva. Recent studies have indicated that nitrate has a protective effect on the salivary glands and other organs by regulating the expression of sialin and maintaining microbial homeostasis. Through the nitrate-nitrite-NO pathway, nitrate can act as a reservoir of NO in vivo and perform a variety of NO-like bioactivities, such as promoting exercise performance, protecting the digestive system, lowering blood pressure, and assisting in tumor treatment. This paper reviews the sources, functions, and possible mechanisms of inorganic nitrate, and discusses the protective role that nitrate promises to play in health and diseases.

Keywords

Inorganic nitrateNitriteNitric oxideSialinMicrobial homeostasisNitrate-nitrite-NO pathway

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Oral Science and Homeostatic Medicine
Volume 1,
June 2022
DOI: 10.1007/s44194-022-00002-1

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Qin L, Wang S. Protective roles of inorganic nitrate in health and diseases. Oral Science and Homeostatic Medicine, 2022, 1. https://doi.org/10.1007/s44194-022-00002-1

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Received: 15 December 2021
Accepted: 09 March 2022
Published: 26 May 2022
© The Author(s). 2022

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