Rabia Ayoubi1,*, Zahra Shafai2, Amir Kabir Raufi3, Haruna Karamba4, Aqa Mohammad Zhakfar5
1Department of Pharmacogonosy, Faculty of Pharmacy, Kabul University, Afghanistan
2Pharm- D, Faculty of Pharmacy, Kabul University, Afghanistan
3Department of Pharmacy, Ghazanfar Institute of Health Sciences, Kabul, Afghanistan
4Department of Science Laboratory Technology, Hussaini Adamu Federal Polytechnic Kazaure, Nigeria
5Department of Pharmaceutics, Faculty of Pharmacy, Kabul University, Afghanistan
*Corresponding author: Rabia Ayoubi, Department of Pharmacognosy, Faculty of Pharmacy, Kabul University, Afghanistan, E-mail: [email protected]
Received Date: June 30, 2024
Publication Date: October 22, 2024
Citation: Ayoubi R, et al. (2024). Medicinal Plants Used for the Treatment of Hyperlipidemia by Traditional Practitioners in Kabul City, Afghanistan. Traditional Medicine. 5(2):24.
Copyright: Ayoubi R, et al. © (2024).
ABSTRACT
Hyperlipidemia, which is characterized by an increase in the total amount of cholesterol, triglycerides and phospholipids of the plasma than its normal level is one of the main components of metabolic syndrome caused by various factors. As the capital of Afghanistan, Kabul city has an ancient history of employing traditional practices and usage of medicinal plants (MPs) for the management of various diseases. However, there is no sufficient documented data regarding the application of traditional medicine including phytotherapy for the treatment of hyperlipidemia. Therefore, the main purpose of this research was to identify and to introduce MPs used for the treatment of hyperlipidemia by traditional practitioners (TPs) in Kabul city. The study was a field research conducted on the months of July and August 2020. Kabul city was selected as the field of study. Cross-sectional convenience sampling was used for data collection. The required information was randomly collected from eight districts of Kabul city and accepted as sample. TPs were selected as participants and interviewed using pre-prepared questionnaires. The result of the study showed that 18 MPs were used by TPs for the treatment of hyperlipidemia in Kabul city. The effectiveness of MPs used to treat hyperlipidemia by TPs in Kabul city, in most of the cases, matches the rational phytotherapy. However, further studies are needed to ensure the identity, purity, quality and uniformity of MPs and their recommended dosage forms throughout the city. The unavailability of herbal-treated lipid profile data of patients suffering from hyperlipidemia who visited TPs for treatment purpose was the main limitation of this study.
Keywords: Hyperlipidemia, Medicinal Plants, Traditional Medicine, Safety, Standardization.
INTRODUCTION
Hyperlipidemia, which is characterized by an increase in the total amount of cholesterol, triglycerides (TGs) and phospholipids (PLs) of the plasma than its normal level is one of the main components of metabolic syndrome caused by various factors. According to the guidelines of the National Cholesterol Education Program (NCEP), the cholesterol level higher than 240 mg/dL in adults is called hyperlipidemia. For children, this limit is less than 180 mg/dL [1].
Major blood lipids include chylomicrons, very low-density lipoproteins (VLDL), intermediate-density lipoproteins (IDL), low-density lipoproteins (LDL), and high-density lipoproteins (HDL). Hyperlipidemia is one of the main causes of atherosclerosis and related disorders such as; ischemic cerebrovascular diseases, coronary heart diseases and peripheral vascular diseases. The relationship between high plasma lipid levels and the development of atherosclerotic plaques is well established [2]. Atherosclerotic plaques may lead to occurrence of ischemic heart disease and acute coronary syndromes [3]. Epidemiological evidence shows that by reducing the level of TGs to approximately 150 mg/dL, the risk of cardiac diseases decreases [4].
Hyperlipidemia is divided into primary and secondary types. Primary hyperlipidemia is usually caused by genetic impairments and mutations, and secondary hyperlipidemia is acquired. The most common causes of acquired hyperlipidemia include nephrotic syndrome, chronic alcoholism, and medicines used in the treatment of myxoedema, diabetes, corticosteroids, oral contraceptives, and beta blockers [5].
Hyperlipidemia is an important risk factor in the initiation and progression of atherosclerosis. Therefore, the most important point for its treatment is to lower the plasma lipids’ level [6]. The statins, cholesterol absorption inhibitors, fibrates, niacin, bile acids-binding resins, and omega-3 fatty acids are generally used for the treatment of hyperlipidemia [7].
The use of synthetic therapeutic agents for the treatment of various diseases, including hyperlipidemia, may cause various side effects. Myopathy, Rhabdomyolysis, increased levels of aminotransferase and creatine kinase (adverse effects of statins); impaired absorption of fat-soluble vitamins, hypernatremia, hyperchloremia, obstruction of the digestive system, and reduction of the bioavailability of acidic drugs and iron (adverse effects of bile acids-binding resins); digestive problems, dizziness, redness and skin rashes, increased formation of gallstones, myositis syndrome, myalgia, weakness, increased level of creatine kinase and aspartate aminotransferase and synergistic effects with the oral anticoagulants (adverse effects of fibrates); hyperuricemia, hyperglycemia (adverse effects of niacin); thrombocytopenia and bleeding disorders (adverse effects of Omega-3 supplements) are some obvious examples of side effects caused by the consumption of different groups of synthetic anti-hyperlipidemic drugs [1,8].
Hyperlipidemia and atherosclerosis are the main causes of heart disease and mortality in most of the countries, both developed and developing. Afghanistan is one of the developing countries in Asia, where more than half of its population is poor. Poverty, illiteracy, unavailability and unaffordability of a healthy diet for the majority of people, inaccessibility of primary health care centers, and stressful living environment have caused various health problems including cardiovascular diseases (CVDs), high blood pressure, hyperlipidemia, diabetes among the residents of the country [9].
Dissatisfaction of hyperlipidemic patients with the use of common lipid-lowering drugs, the occurrence of side effects due to the excessive and long-term use of anti-hyperlipidemic medications, diseases caused by abnormal increase in the level of plasma lipids and the costs imposed on patients, the effectiveness of natural products in reducing blood lipids’ level, safety, reasonable price and accessibility of these alternatives have caused most people to use MPs and other traditional preparations to control and treat hyperlipidemia. Recent studies on MPs used in traditional medicine indicates that presence of certain phytoconstituents such as flavonoids, sterols and other antioxidant compounds not only reduce the level of serum lipids but also inhibit the oxidation of LDL and consequently remove reactive oxygen species (ROS). In addition, these phytoconstituents may affect immune system and improve the body’s overall strength that is more likely effective for the management of hyperlipidemia [10,11].
Considering the high prevalence of CVDs in the country, the importance of hyperlipidemia as the main risk factor for the occurrence and progression of CVDs, and the preference of patients to use natural remedies for the treatment of various health problems including hyperlipidemia a decision was made to investigate the use of MPs for the treatment of hyperlipidemia in different districts of Kabul city, one of the most populated provinces of the country. The main purpose of this research was to introduce MPs used in the treatment of hyperlipidemia by TPs in different districts of Kabul city, Afghanistan.
Aims and Objectives
This research aimed to investigate the traditional phytotherapy for the control and treatment of hyperlipidemia employed by TPs across the different districts of Kabul city. In most specific words, the main objective of the study was: to introduce MPs and their recommended preparations used for the treatment of hyperlipidemia by TPs in different districts of Kabul city, Afghanistan.
METHOD
The study was a field research conducted on the months of July and August 2020. Kabul city was selected as the study area. Cross-sectional convenience sampling was used to collect data. The required information was randomly collected from eight districts; including the first (Mandawi, Bagh-e-Qazi, Sar-e-Chawk), the third (Pol-e-Surkh), the fifth (Mirwais maidan, Afshar), the sixth (Pol-e-Sokhta, Alauddin), the seventh (Chehlseton, Dehmazang), the tenth (Taimani), the thirteenth (Pol-e-Khoshk, Naqash, Tank-e-Tel), and the eighteenth (Sorkhabad) districts of Kabul city and was accepted as sample. TPs were selected as participants and interviewed using pre-prepared questionnaires. The prepared questionnaires included the information regarding the demographic characteristics of TPs, the type of MPs used for the treatment of hyperlipidemia by TPs, the MPs parts used for the treatment of hyperlipidemia and their methods of preparations, the reasons for using herbal medicine for the treatment of hyperlipidemia and some other general questions. The main limitation of this study was unavailability of pre- and post-herbal treated lipid profile data of patients suffering from hyperlipidemia who visited TPs for the treatment purpose.
RESULT
In order to investigate the MPs used for the treatment of hyperlipidemia, a total of 80 pre-prepared questionnaires were distributed among the participants (TPs) in Kabul city. Totally, 48 TPs were surveyed. The participated TPs were aged between 25-55 years old and most of them had primary education.
The result of this research showed that TPs of different districts (the first, third, fifth, sixth, seventh, tenth, thirteenth, eighteenth districts) of Kabul city have used a total of 18 MPs for the treatment of hyperlipidemia. The used MPs along with their scientific and local names, plant families, parts used and method of preparations are summarized in Table 1.
Table 1. List of MPs used for the treatment of hyperlipidemia by TPs in different districts of Kabul city (researcher)
No. |
Scientific Name |
Local Name |
Plant Family |
Part Used |
Method of Preparation |
1 |
Anethum graveolens L. |
Shebet |
Apiaceae |
Fruits, Herb |
Infusion, Decoction |
2 |
Berberis sp. |
Zereshk |
Berberidaceae |
Fruits |
Dried fruits |
3 |
Carum carvi L. |
Zira-e-sia |
Apiaceae |
Fruits |
Infusion |
4 |
Cassia angustifolia M. Vahl |
Sanna-i-makki |
Fabaceae |
Leaves |
Decoction |
5 |
Cichorium intybus L. |
Kasni |
Asteraceae |
Root, Leaves |
Dried form, Infusion |
6 |
Citrus aurantium L. var. amara Engl. |
Narenj |
Rutaceae |
Leaves |
Decoction |
7 |
Descurainia Sophia (L.) Webb ex Prantl |
Khakshir |
Brassicaceae |
Seeds |
Mixture |
8 |
Ephedra sp. |
Bandak |
Ephedraceae |
Herb |
Infusion |
9 |
Hibiscus sabdariffa L. |
Chai Makka |
Malvaceae |
Flowers |
Infusion |
10 |
Olea europaea L. |
Zaitoon |
Oleaceae |
Fruits, Leaves |
Fresh form, Decoction |
11 |
Stachys lavandulifolia Vahl |
Chai-e-kohi |
Lamiaceae |
Flowers |
Infusion |
12 |
Terminalia chebula Retz. |
Halila-e-zard |
Combretaceae |
Fruit |
Mixture |
13 |
Thymus sp. |
Awishan |
Lamiaceae |
Leaves and Flowers |
Fresh form |
14 |
Trigonella foenum- graecum L. |
Shanbalila |
Fabaceae |
Seeds |
Fresh and Dried forms |
15 |
Urtica dioica L. |
Atashak, Gazana |
Urticaceae |
Whole plant |
Fresh and Dried forms, Decoction |
16 |
Vitis vinifera L. |
Angoor-e-sia |
Vitaceae |
Fruits |
Fresh and Dried fruits |
17 |
Zingiber officinale Roscoe |
Zanjabil |
Zingiberaceae |
Rhizome |
Fresh form, Powdered |
18 |
Ziziphus jujuba Mill. |
Onab |
Rhamnaceae |
Fruits |
Dried fruits, Decoction |
DISCUSSION
Hyperlipidemia is an abnormal increase in the level of serum lipids (total cholesterol, TGs, IDL, VLDL, and LDL), which is responsible for the development and progression of various diseases such as CVDs, stroke, arteriosclerosis, etc. This study has introduced 18 types of MPs used by TPs of Kabul city for the treatment of hyperlipidemia. Existing scientific researchers have proven the anti-hyperlipidemic properties of these plants.
The therapeutic effects of A. graveolens have been compared with cholestyramine, nicotinic acid and gemfibrozil in patients with high level of serum lipid. The result showed that the lipid lowering effect of A. graveolens is not much different from the selected synthetic alternatives. However, A. graveolens had greater effect to reduce cholesterol level with lower effect on TGs and HDL compared to gemfibrozil. No side effects have been reported after taking the preparations of A. graveolens, but several problems including digestive system discomfort, increased risk of gallstone production, etc. have been recorded after usage of gemfibrozil [12]. The results of clinical studies have shown that the consumption of products containing the fruit and herb of A. graveolens in patients suffering from hyperlipidemia and hyperlipoproteinemia (high blood cholesterol and TGs) after two weeks reduced the amount of VLDL and LDL [12]. D-limonene, one of the main phytoconstituents present in the EO of A. graveolens fruit is an excellent solvent for cholesterol. This compound has been used clinically to dissolve gallstones containing cholesterol [13]. The plant crude extract can reduce lipid peroxidation in the liver and improve the activity of antioxidant enzymes in rats fed high-fat diet [14]. Using the ethanolic extract of A. graveolens at a daily dose of 1 ml (equivalent to 500 mg of herbal powder) for 10 to 30 days has caused a decrease in the serum lipid level in rats. In addition, a significant increase in the secretion of HMG-COA mevalonate in mice has been observed after treatment with ethanolic extract of plant for 30 days [15].
TPs have recommended Berberis sp. for the treatment of hyperlipidemia. Berberine is one of the most important alkaloids of the plant, which may be effective to prevent coronary disease and to reduce cholesterol and TGs levels. Berberine lowers the cholesterol level in a different mechanism than statins, so if used simultaneously with statins, it seems to control cholesterol level more effectively [16]. Berberine up-regulates the expression of specific type of receptor in the liver, which can bind to cholesterol and facilitate its excretion [17]. Moreover, there are other possible mechanisms by which berberine can reduce the level of serum lipids including increasing mRNA of LDLR, LDLR protein of liver, phosphorylation and activation of adenosine monophosphate and protein kinase [18].
C. carvi exerts its anti-hyperlipidemic effects by reducing the biosynthesis of cholesterol, especially through reducing the activity of the enzyme HMG-CoA reductase or the level of NADPH required for cholesterol synthesis [19]. In addition, the fruits of plant may alleviate hypercholesterolemia by modifying the metabolism of lipoproteins, LDL absorption through up-regulation of LDL receptors, or by increasing the activity of lecithin cholesterol acyltransferase [19]. C. carvi may facilitate rapid LDL catabolism. Repeated administration of C. carvi fruits for 15 days has significantly decreased plasma TGs in normal diabetic rats [19].
The hypolipidemic activity of ethanolic extract of C. angustifolia in Triton X 100 induced hyperlipidemia in rats has been evaluated. The result showed that usage of 400 mg/kg of plant extract significantly lowers serum lipids level [20]. In the other study it was reported that short term treatment with hydroalcoholic extract of C. angustifolia significantly reduced the level of cholesterol, TGs, LDL-C and increased HDL-C in hyperlipidemic rats [21].
The use of C. intybus in traditional medicine has a long history. Ancient Egyptians had used it to treat CVDs and strengthen liver function. Studies have shown that the inulin of the plant has TGs lowering effects [22]. Inulin extracted from C. intybus reduces blood uric acid and TGs by regulating the level of acetyl CoA [23].
Anti-hyperlipidemic activities of many Citrus sp. including C. aurantium have documented [24]. The result of in-vivo experiments has shown that neohesperidin (NHP) derived from C. aurantium. significantly decreased serum TGs, total cholesterol, leptin level, and liver index in the KK-A(y) diabetic mice. In addition, inhibition of lipid accumulation in the liver and decreased size of epididymal adipocyte have been seen in the KK-A(y) mice after administration of NHP, which are due to modification in gene expression of fatty acid synthase (FAS), stearoyl-CoA desaturase 1 (SCD-1) and acyl-CoA oxidase (ACOX) [25].
The findings of several studies have shown that administration of extract of E. sinica Stapf can reduce the level of cholesterol, TGs, LDL and increase HDL level [26,27].
The aqueous and ethanolic extracts of H. sabdariffa flowers and leaves prevent the oxidation of LDL and macrophages [28,29]. H. sabdariffa reduces the formation of foam cells and inhibits smooth muscle cell contractions, which helps to slow down the progression of atherosclerosis [30].
In the study on mice fed with high-fat diet, it was found that treatment with O. europaea leave extract reduced the level of serum lipids (total cholesterol, LDL, and TGs), which is attributed to the increase in the antioxidant enzymes, catalase and superoxide dismutase [31].
The hypocholesterolemic effect of T. chebula fruit in mice fed with atherogenic diet has evaluated. The oral administration of powdered fruit decreased the body weight, serum total cholesterol, TGs, thickening of the walls of aorta and shrinkage in aorta lumen of treated rats [32]. In addition, rats receiving treatment with T. chebula have shown increased level of HDL. It has observed that the plant has an excellent lipid-lowering activity at concentrations of 1.05- 2.10 mg/kg body weight [33].
It has been stated that the anti-hyperlipidemic and cholesterol lowering activities of Thymus sp. is due to effect of carvacrol on HMG-COA reductase, which can reduce the lipid absorption from the gut or decrease the lipid catabolism for the gluconeogenesis [34].
The seeds of T. foenum- graecum have been used by TPs in different districts of Kabul city to treat hyperlipidemia. It has been reported that T. foenum- graecum with a dose of 2.5 grams per day for three months has reduced total cholesterol and TGs in patients suffering from coronary artery diseases with and without type II diabetes and had no effect on HDL [35]. The exact mechanism of anti-hyperlipidemic effect of T. foenum- graecum is not yet clear. However, it is thought that the herbal preparations of the plant inhibit the absorption of cholesterol from the gut due to the formation of saponin and cholesterol complex [36].
U. dioica is a potent anti-hyperlipidemic plant, which can reduce the level of lipids and lipoproteins in the blood. Administration of plant aqueous extract at a dose of 150 mg/kg for 30 days in rats fed with a normal or high-fat diet has improved blood lipid profile [37]. The herbal preparations containing U. dioica have decreased serum total cholesterol, TGs and LDL, while increasing HDL in an animal model of polycystic ovary syndrome (PCOs). It seems that the continuous consumption of aqueous and petroleum ether extracts of U. dioica significantly affect blood lipid profile and directly influence the synthesis and metabolism of lipoproteins [38]. It has also been found that U. dioica lowers blood TGs level, and its root reduces the activity of HMG-COA reductase, thereby reducing LDL levels in rats [39].
Recent studies have shown that the seed extract of V. vinifera significantly reduces plasma cholesterol levels in rabbits fed a high-cholesterol diet. Long-term use of plant seed extract may decrease plasma lipids by inhibiting the activity of pancreatic lipase, cholesterol esterase, and binding of bile acids [40].
Researchers conducted on diabetic animals have shown that Z. officinale significantly lowers serum total cholesterol, LDL, VLDL, TGs and phospholipids and reduces the risk of atherosclerosis. Z. officinale acts on the liver to reduce cholesterol biosynthesis and may stimulate the conversion of cholesterol into bile acids and increase its excretion [41]. Z. officinale has shown anti-hypercholesterolemic properties in rats fed with high cholesterol diet, which is due to its ability to inhibit angiotensin-converting enzyme (ACE). In addition, the activity of the liver hydroxylase enzyme has increased after consumption of the plant-containing products, which plays an important role in converting cholesterol to bile acids [42].
Studies have shown that consumption of 64 mg/kg per day fruit of Z. jujuba for 20 days can reduce total cholesterol and LDL levels. and increase HDL in rats fed with natural diet [43]. The hydroalcoholic extract of the plant leaves at doses of 200, 400 and 600 mg/kg for 125 days lowers body weight, LDL, VLDL, TGs and increases HDL levels [44]. Z. jujuba inhibits intrahepatic production of bile, and increases hepatic synthesis of bile acids [45].
TPs have used D. sophia and S. lavandulifolia for the treatment of hyperlipidemia. There are some evidences showing LDL-lowering effects of D. sophia in cardiovascular patients with high LDL cholesterol [46]. However, more researches are needed to prove anti-hyperlipidemic effects of the plant. Anti-oxidative stress activity of S. lavandulifolia aqueous extract in human has reported [47]. In order to ensure the effectiveness of plant and its preparations to treat hyperlipidemia, more studies are required.
CONCLUSION
Hyperlipidemia is a prevalent disease and one of the components of metabolic syndrome caused by various factors. The main goal of treatment in hyperlipidemic patients is to reduce the risk of ischemic heart disease or the occurrence of other cardiovascular or cerebrovascular disorders. The results of this study revealed that 18 MPs are used by TPs of Kabul city for the treatment of hyperlipidemia. The effectivness of reported MPs for the treatment of hyperlipidemic have documented by the scientific studies, in most of the cases. However, to ensure the safety, interactions, efficacy, and rational use of MPs used for the treatment of hyperlipidemic, especially in the cases of Ephedra sp., D. sophia and S. lavandulifolia extensive studies should be done. As MPs have a plethora of phytochemicals with different bioactivities, so it is important to rely on evedince-based findings not just emprical therapies. Moreover, establishment of successful treatment report is highly relied on the presence of clinical data showing the total lipid profile, both pre- and post-treatment, of hyperlipidemic patients visited TPs for the treatment purpose. There are some drawbacks for the usage of MPs and many herbal products to manage several chronic diseases including hyperlipidemia. As so many factors may affect the acheivements or failures of traditional practices.
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