Lupine Publishers | LOJ Pharmacology & Clinical Research
Introduction
Since the beginning of
civilization, medicinal plants have been an intrinsic component of human life
[1]. The conservation of ethnobotanical knowledge as part of living culture and
practice between communities and the environment is essential for biodiversity
conservation. The information about medicinal plants gains from various
medicinal systems such as Unani, Siddha, and Ayurveda [2]. The traditional
system of medicine belongs to the traditions of each country and has been
passed over from generation to generation. Understanding the dynamics of
traditional local knowledge of medicinal plants is important for their
medicinal properties is now being developed as a source of scientific research
to prove the effect of plants and generate new therapeutic resources. Medicinal
plants are considered as a backbone of traditional medicine (WHO) as well as
most modern medicine is also derived from medicinal plants i.e. aspirin. The
medicinal plant having a rich source of components that can be used to develop
and synthesize drugs. About 3.3 billion people in developing countries depend
on medicinal plants on a regular basis, WHO estimated that about 80% world
population rely on the medicinal plant for their primary health care. Further
more, worldwide 42% of 25 top-selling drugs marketed are either directly
obtained from natural sources or entities derived from plant products [3]. The
quality of traditional medicine is determining its active substances produced
by the plant. Andrographis paniculata is one of the important medicinal plants
that is utilized throughout the world [4]. A.paniculata is an herbaceous plant
of the Acanthaceae family. It is widely distributed in Southeast Asia, India,
and tropical as well as in subtropical Asia. A.paniculata is also known as the
“King of Bitters” since it has a highly bitter taste in all parts of the plant
body [5]. Furthermore, A. paniculata is known as “Kalmegh” in India,
“Chuan-Xin-Lian” in China, “Fah Tha Lai” in Thailand, “Hempedu Bumi” in
Malaysia, “Senshinren” in Japan, and “green chiretta” in Scandinavian nations
[6]. A.paniculata is one of the most widely used plants in Ayurvedic and Unani
medicine [4]. Traditionally, A.paniculata was used in the treatment for
snakebite, fever, bug bite, diabetes, malaria, and dysentery [7]. Moreover,
A.paniculata is also used in the combination with other herbs and health care
treatment. It is found that A.paniculata is used in more than half of the
herbal formulations commercialized in India for he patic diseases [8]. Many
scientific studies also have been reported regarding the medicinal properties
possessed by the A.paniculata, most of which are based on traditional knowledge
(Table 1). Phytochemical investigations have revealed that A. paniculata
contains a wide range of chemicals. In addition, experimental evidence also
reported that A.paniculata has a broad spectrum of pharmacological activity
including anti-bacterial, antidiarrheal, anti-inflammatory, antiviral,
antimalarial, anticancer, antimalarial, hepatoprotective, etc. In this review,
we briefly discuss ethnobotanical uses, phytochemistry, and recent scientific
finding pharmacological activity of the A.paniculata [6].
Table 1: Taxonomical
classification of Androgrphis paniculata.
Botanical Description
and Habitat
A.paniculata is native
species of India, China, and Taiwan. But it is also found in Southeast Asia,
tropical and subtropical Asia as well as few other nations such as Malaysia,
Indonesia, Vietnam, Sri Lanka, Laos, Cambodia, Pakistan, Myanmar, and the
Caribbean islands [9]. Especially, in India A.paniculata are found in
Karnataka, Andhra Pradesh, Tamil nadu, Uttar Pradesh, and Madhya Pradesh. Also
cultivated in Assam and West Bengal to some extent. In addition, A.paniculata
are found in different habitats including forests, farms, plains, hill slopes,
dry and wetlands, and wastelands [10]. A.paniculata is bitter in test, an
annual herb that is abundantly branched which grows up to a height of 3.-110 cm
in a humid, shady area. It has glabrous leaves that are 8.0 cm long and 2.6 cm
wide, little white flowers that are rose-purple or light pink, spots on the
petals, and corolla with hairs. The stem was found to be dark green in color,
0.4-1.0 m tall, 2-6 mm in diameter, quadrangular with longitudinal furrows and
wings on the angles of the younger part [11] as shown in Figure 1.
Figure 1: Andrographis paniculata morphology.
Traditional Uses of
Andrographis Paniculata
A.paniculata play vital
importance in the Ayurvedic, Siddha, and traditional medicine systems in India
[12]. For centuries, the leaves and roots of A.paniculata have been used to
treat a wide range of health problems in Asia and Europe. However, the entire
plant is also utilized for specific uses [13]. The plant known as “Kalmegh” in
Ayurvedic literature is an essential element in the majority of Ayurvedic
remedies and is officially recognized by Ayurvedic pharmacopeia. Moreover, it
is used as an aperient, emollient, astringent, anti-inflammatory, diuretic,
anthelmintic, carminative, and antipyretic in the Unani system of medicine
[14].In India, tribal groups used this herb to cure a number of diseases such as
antidote against snake bites, Banded Krait and Russell’s viper, etc. [14]. The
tribal of Kheria, Khatra, Moora, and the Santal region of Bankura district,
West Bengal, India utilizes an infusion of the entire plant to treat fever
[15]. The extracted juice from A.paniculata leaves, alone or combined with
cloves, cinnamon, and cardamom is used as a cure for flatulence, loss of
appetite, griping, diarrhea in children, and irregular stool. In India during
the influenza epidemic in 1919, A.paniculata was shown to be highly effective
in reducing the disease progression [16]. It was also utilized by ancient
Chine’s physicians to treat inflammatory diseases, colds, laryngitis, and
fever, hepatitis, pneumonia, respiratory infections, tonsillitis, sores, pelvic
snake bites, herpes zoster and it has been characterized as a cold property
herb [13] to remove toxins and body heat. The decoction of fresh leaves of
A.paniculata is used as an antihypertensive and antidiabetic in Malaysian folk
medicine. Furthermore, it is advised to use it in cases of leprosy, scabies,
gonorrhea, boils, chronic and seasonal fevers, and skin eruptions, due to its
“blood purifying” purifying properties [4].
Phytochemistry
The aerial part (leaves
and stems) of A. paniculata contains major active phytochemicals [17].
According to the survey of the literature, andrographolide is the major
bioactive compound found in the A.paniculata which is a diterpene lactone that
is crystalline, colorless, and has a bitter taste [9]. The leaves have the highest
concentration of andrographolide about 2.39% whereas the seed has the lowest
concentration about 0.58%. The quantity of the phytochemicals varies widely
depending on the portion used, locality, time of harvesting, and season (Figure
2). Andrographolides are highest found immediately before the flowering season,
then decline progressively [14]. Other lactones compound observed in
A.paniculata is 14-deoxy-11-andrographolide, 14-deoxy-11, 12
didehydroandrographolide, andragraphan, andrographon, 14-deoxyandrographolide,
neoandrographolide, deoxyandrographiside, andrographosterol, andrographiside
etc. A.paniculata also contains Xanthones and quinic acid derivatives in minor
concentrations. Moreover, Reddy et a. [18] reported that A.paniculata contains
flavone such as 5-hydroxy-7’2’6’-trimethoxyflavone and 23-C terpenoid
14-deoxy-15-isopropylidene-11, 12- didehydroandrograholide and other flavonoid
Skullcapflavone I 2’-O-glucoside, 7-Omethylwogonin, 7-Omethyldihydrowogonin and
7-O-methylwogonin 5-O-glucoside as well as diterpenoids such as
isoandrographolide 14-deoxy-11, 12 didehydroandrographolide. Rao et al. [19]
identified and isolated 5, 7, 20, 30-tetramethoxyflavanone and 5-hydroxy-7, 20,
30-trimethoxy flavone from the A.paniculata. A new labdane type diterpenoid
which is andropanolide along with seven known diterpenoids isolated from the
methanolic leaves extract of A.paniculata [20].
Figure 2: Chemical structure of major component found in A.paniculata.
Pharmacological
Activity of A.Paniculata
Hepatoprotective activity
A.paniculata is widely
used as a hepatoprotective and hepatostimulative agent in the Indian
traditional medicine system. Traditionally the leaves aqueous extract of
A.paniculata is used in the treatment of jaundice and different liver damage.
Andrographolide found in the A.paniculata was protective against liver damage
in rats and mice induced by carbon tetrachloride. Moreover, Andrographolide
also observed significant hepatoprotective against various types of liver
damage, induced by galactosamine or paracetamol [21]. The free radical
scavenging activity of andrographolide has a significant hepatoprotective
effect by lowering lipid peroxidation malondialdehyde product as well as by maintaining
glutamic pyruvate transaminase, alkaline phosphatase, and glutathione levels in
mice treated with carbon tetrachloride [22]. A.paniculata has been shown
antihepatotoxic activity against plasmodium berghei K173-induced hepatic damage
in mastomys natalensis [23].
Antibacterial activity
A.paniculata has been
shown the antibacterial activity against a wide range of bacterial species. In
vitro study found that the aqueous extract of A.paniculata shown antibacterial
activity even at the low concentration (25 mg/ml) against E.coli, Shigella,
Streptococci, Staphylococcus aureus, and Salmonella [24]. Another similar study
leaves aqueous extract of A.paniculata reported against the methicillin-
resistant S.aureus and Pseudomonas aeruginosa [25]. Furthermore, A.paniculata
is also effective against HAS 1 (herpes simplex virus 1) without any
cytotoxicity [26].
Antidiarrheal activity
In developing countries,
Diarrhea is one of the most common diseases and it leads to the top ten causes
of death among children worldwide [5]. Some drugs such as kaolin-pectin,
selenium, loperamide, and bismuth have been used to treat the symptoms.
However, it also causes some unfavorable side effects [5]. The study has been
found that A.paniculata has significant antidiarrheal properties [27].
According to the study, an ethanolic extract of A.paniculata treated 88.3 % of
acute bacillary dysentery cases and 91.3% of acute gastroenteritis cases.
Furthermore, andrographolide was found to treat 91% of acute bacillary
dysentery cases. The same cure rate of about 91.1% was obtained by providing a
compound tablet comprising andrographolide and neoandrographolide in a 7:3
ratio. This was claimed to be more than the cure rate observed with
chloramphenicol and furazolidone [28]. A.paniculata was found to be effective
in curing patients with acute diarrhea and bacillary dysentery in double-blind
investigation [14].
Antimalarial activity
In many tropic and
subtopic countries, malaria is still a prevalent disease [14]. A.paniculata was
shown to significantly suppress the growth of the Plasmodium berghei [11]. In
vitro study of 50% ethanolic extract of the aerial parts (100 mg/g) shown
antimalarial activity against plasmodium berghei and in vivo study in rats
observed antimalarial activity after intragastric application (1g/kg body
weight) [26]. It is suggested that the antimalarial effect of A. paniculata is
due to the reactivation of the enzyme superoxide dismutase [5]. Another study
has been reported that the crude extract of A.paniculata shown antimalarial
activity against the resistant strain of Plasmodium falciparum having an IC50
value of 6mg/ml [29]. In addition, a xanthous compound isolated from the A.
paniculata has been shown in vivo antimalarial activity in plasmodium infected
Swiss albino mice. The results found that a significant reduction in
parasitemia after treatment with a 30 mg/kg dosage [26].
Anticancer activity
Cancer is a set of
disorders characterized by abnormal cell proliferation and the ability to
penetrate or be spared to other regions of the body. Despite the fact that many
diseases have a worse prognosis than most cancers [17]. The extract of
A.paniculata having diterpenoid is significantly able to restrict cell
proliferation, arrest the cell cycle and induce cell apoptosis of different
cancer cells [30- 33]. Treatment of the MDA-MB-231 breast cancer cells with
andrographolide extracted from A. Paniculata causes apoptosis of cancer cells
and arrests the cell cycle without interfering with the normal growth of cells
[34]. The study has been reported that A.paniculata exhibits potent cytotoxic
activity against human epidermoid carcinoma of the skin lining of the
lymphocytic leukemia cells and nasopharynx [12]. A.paniculata also shown
cytotoxic effects against colon cancer cells by suppressing AKT and mTOR
phosphorylation levels, resulting in ER stress-induced death [35]. Furthermore,
apoptosis in colon cancer cells is induced by the andrographolide via
controlling the signaling of pro-apoptotic GRP-78/IRE1/XBP-1/ CHOP [17].
Antidiabetic activity
Diabetes is a metabolic
disease characterized by elevated blood sugar levels [36]. According to the WHO
reports around 70 million people worldwide suffer from diabetes. Specifically
in developing countries, diabetes has become a threat to human health [37]. In
vivo study observed that ethanolic extract of A.paniculata exhibit the
protective effect in hyperglycemic condition and also protect the tissue damage
caused due to oxidative stress in a diabetic rat model produced by
streptozotocin [38]. Another study conducted [39] found that oral
administration of andrographolide in a dose-dependent manner reduced plasma
glucose levels in diabetic rats caused by streptozotocin and wild-type rats.
Conclusion
The entire literature
review indicated that Andrographis paniculata exhibits a broad range of
phytochemicals and pharmacological activities. The previous study found that
A.paniculata contains 50 lactane diterpenoids, 30 flavonoids, and 30 novels
phytochemical isolated and identified from A.paniculata. Phytochemical study
reveals that Andrographolide is a major compound found in Andrographis
paniculata. It has shown a wide spectrum of pharmaceutical activity such as
anti-microbial, hepatoprotective activity, anti-inflammatory activity, anti-malarial,
anti-diarrheal, anti-diabetic, and cytotoxic activity. The precise information
offered as a review here covers the phytochemical and pharmacological
information about this plant, providing the muchneeded encouragement to use
this plant in creating and sustaining a prospective means of livelihood.
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