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Pharmacological Properties and Their Medicinal Uses of Cinnamomum: a Review Sanjay Kumara, Reshma Kumarib and Shailja Mishrab Adepartment of Botany, Govt

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Pharmacological Properties and Their Medicinal Uses of Cinnamomum: a Review Sanjay Kumara, Reshma Kumarib and Shailja Mishrab Adepartment of Botany, Govt Review Pharmacological properties and their medicinal uses of Cinnamomum: a review Sanjay Kumara, Reshma Kumarib and Shailja Mishrab aDepartment of Botany, Govt. P. G. College, Bageshwar, Uttarakhand, India and bDepartment of Botany & Microbiology, Gurukul Kangri University, Haridwar, India Keywords Abstract antimicrobial; cinnamon; ethnopharmacology; phytochemical Objectives Cinnamomum (Family Lauraceae) is traditionally used for compounds; traditional use flavouring food and in pharmaceutical preparations against various ailments. Detailed literature on the ethnobotanical and pharmacological properties of Correspondence Cinnamomum is segregated and not present in well-documented form. In Reshma Kumari, Department of Botany & the present review, we have been trying to gather its detailed medicinal as Microbiology, Gurukul Kangri University, Haridwar 249404, India. well as pharmacological properties. The ethnobotanical and pharmacological E-mail: [email protected] properties of Cinnamomum were collected by searching several scientific databases, that is PubMed, Elsevier, Google Scholar, Science Direct and Received April 28, 2019 Scopus. Accepted September 14, 2019 Key findings The plant extracts have been reported to possess astringent, warm- ing stimulant, carminative, blood purifier, digestive, antiseptic, antifungal, antivi- doi: 10.1111/jphp.13173 ral, antibacterial, antioxidant, anti-inflammatory and immunomodulatory properties and also help to reduce cholesterol and blood sugar levels. A wide range of phytochemical compounds including aldehydes, acetate, alcohol, ter- pinenes, flavonoids, alkaloids, anthraquinones, coumarins, phenols, saponins, tannins, carboxylic acid, hydrocarbons, camphene, spathulenol, fatty acids, actin- odaphnine, butanolides, lignans, steroids, propenoids and kaempferol glycosides are found in various parts of plant. Summary This review provides detailed information about history, traditional uses, phytochemistry and clinical impacts of cinnamon as a spice and medicine. So we recommend further study on the clinical, medicinal, purification and iden- tification of the most effective antibacterial activity of cinnamon to cure various infectious diseases. Introduction (Chinese cinnamon), Cinnamomum burmannii (Java or Indonesian cinnamon) and Cinnamomum loureiroi (Viet- Cinnamomum derived from the Greek word ‘kin- namese or Saigon cinnamon).[9] Cinnamon have immense namomon’ which means ‘spice’[1] and ‘sweet wood’.[2] aromatic potential are used in food and pharmaceutical Around 250 species of this genus are identified around the industry. Its leaf and bark have digestive, blood purifier, world.[3,4] Different parts contain some primary con- astringent, carminative, warming stimulant, antiseptic, stituents, that is cinnamaldehyde and trans-cinnamalde- antibacterial, antifungal and antiviral properties and can hyde (Cin), present in the essential oil of its bark help to reduce cholesterol and blood sugar levels. Camphor contributing to the fragrance and various biological activ- is one of the important chemical compounds derived from ity,[5] eugenol (leaf) inhibit several different MDR patho- C. camphora, employed in pharmaceuticals, especially lini- genic bacteria[6,7] and camphor (root).[8] This genus ments and insecticides.[2] Its bark contains procyanidins contains four main economically important cinnamon spe- and catechins[10] which is used as spices for cooking as well cies, that is Cinnamomum verum (‘true cinnamon’, Sri as very useful to cure type 2 diabetes mellitus[11–13] and Lankan or Ceylon cinnamon), Cinnamomum cassia insulin resistance medicine. © 2019 Royal Pharmaceutical Society, Journal of Pharmacy and Pharmacology, 71 (2019), pp. 1735–1761 1735 Pharmacological properties of Cinnamomum Sanjay Kumar et al. Table 1 summarizes the chemical constituents, pharma- marshy places and on well-drained soils. However, they cological activity and medicinal properties of various Cin- become extremely rare in latitudes with seasonal climatic namomum species. conditions.[18,20] Materials and Methods Traditional uses The current review was conducted using a complete and Its timber is used for decoration, furniture, cabinet and ply- organized search of the available literature. The searches wood manufacture. C. javanicum have tough timber used were performed using various databases, including PubMed for construction and house building. The term cinnamon is (http://www.ncbi.nlm.nih.gov/pubmed), Science Direct the dried bark of C. zeylanicum and C. aromaticum[21] used (http://www.sciencedirect.com/), Scopus (http://www.sco in preparing chocolate, beverages, spicy candies and pus.com/), Scirus (http://www.scirus.com/) and Google liquors.[22] True cinnamon obtained from C. verum bark Scholar (http://www.scholar.google.com/) using the terms, which is one of the most required spice.[23] Several species for example Cinnamomum spp., phytochemistry, pharma- are also used as substitutes for the true cinnamon. The four cological activity, cinnamon, antibacterial antimicrobial main commercially available cassias are C. cassia, C. ta- and traditional uses. Scientific names and synonyms were mala, C. burmannii and C. loureirii. C. burmannii, C. iners, validated through www.theplantlist.org and www.tropicos. C. porrectum, C. rhynchophyllum and C. soegengii are used org. as spice and flavouring food in Sabah. Java cinnamon (C. burmannii) which is also known as ‘keningau’ is com- History monly found in the foothills of the Crocker Range and Keningau. As an ingredient, distilled cinnamon oils are also Cinnamon is used in different culinary practice from thou- [14] used in flavouring foods and drinks. Diarrhoea and malaria sands of years. Due to its high healing significance, it can be cure by the bark of C. burmanii.[24] C. politum bark has been used as antiemetic, antidiarrhoeal, antiflatulent is mixed with hot drinks to give strength and relieve muscle and stimulant agent in Ayurvedic medicine.[15] Egyptian [16] pain. Crushed leaves and bark paste of C. crassinervium are people used it for mummification. Portuguese imported used for headache. C. rhynchophyllum and C. soegengii the spice (C. zeylanicum) from Sri Lanka to European [14] leaves are used to treat stomach ache and food poison- countries during the 16th and 17th centuries. In Java, ing.[24] In Peninsular Malaysia, leaf juice of C. iners is used cinnamon cultivation started in the 17th century during as a poultice by the Sakai ethnic group for rheumatism. the Dutch occupation, and it exported by East India Com- [16] C. javanicum root decoction is used to treat fatigue and pany to European countries. Sri Lanka became the main chest pain, while C. crassinervium is used for stomach ache. source of cinnamon oils after Ceylon cinnamon cultivation The roots of C. iners, C. porrectum and C. subcuneatum are reduces, which is used in pharmaceutical and food indus- boiled, and its decoction is given after childbirth and also tries. Chinese cinnamon oil is also used by pharmaceutical [16] for treating fever. The roots of C. subcuneatum are used in industries. pain relief on rheumatic joints. C. porrectum seed oil can also be used for rheumatism. The bark and fruits are also Distribution used in perfumes. C. porrectum used as a scent for soap and C. verum as perfumes. The mucilage of C. iners is used in This genus was described by Schaeffer, Jacob Christian (H. the manufacture of mosquito coils, fragrant joss sticks and von) Schaeffer, in the year 1760. About 250 species of Cin- formica.[25] Cinnamon possesses strong antifungal, antibac- namomum are found in the tropical and subtropical terial, antitermitic, larvicidal, nematicidal, and insecticidal regions, frequently in Asia and some in South and Central properties.[26–31] America and Australia.[17] Botanical description Clinical aspects This genus contains small, evergreen trees and shrubs of Several clinical studies on cinnamon are conducted due to 10–15 m tall. Plants are found in China, Australia, South- its high remedial potential. According to Clinical Trials East Asia and Africa. The leaves are ovate–oblong and 7– Govt. database, a total of 26 clinical trials including six 18 cm long.[18] Flowers are greenish in colour and arranged studies, 14 completed studies, two recruited studies, two in panicles. The fruit is a 1-cm purple berry with a single terminated studies and two active studies have been done. seed.[19,20] It grows in tropical rain forests at various alti- However, most of these studies still under process tudes from highland slopes to lowland forests including (Table 2).[32] 1736 © 2019 Royal Pharmaceutical Society, Journal of Pharmacy and Pharmacology, 71 (2019), pp. 1735–1761 Sanjay Kumar et al. Pharmacological properties of Cinnamomum Table 1 The chemical constituents, antimicrobial activity and medicinal properties of various Cinnamomum species Part S. No. Plant used Chemical constituent Pharmacological activity Medicinal use 1. Cinnamomum Leaf Aldehydes: (E)-Cinnamaldehyde, benzaldehyde.[38] Antimicrobial activity,[38] platelet- Headache[38] aureofulvum Acetate: (E)-Cinnamyl acetate, benzyl acetate.[38] activating factor (PAF) receptor- Gamble Alcohol: Benzyl alcohol.[38] binding antagonist activity[39] Terpinenes: (Z,Z)-Farnesol, 1,8-cineole, borneol, guaiol, myrcene, terpinen-4-ol, b-caryophyllene, c- terpinene, ⍺-guaiene, ⍺-terpineol[38] Bark Acetate: (E)-Cinnamyl acetate, benzyl acetate.[38] Aldehydes: (E)-Cinnamaldehyde, benzaldehyde.[38] Terpinenes: (Z,E)-Farnesol, (Z,Z)-farnesol, 1,8-cineole,
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