Hematinic and antioxidant potential of aqueous extract of Sesamum indicum seeds against phenylhydrazine-induced hemolytic anemia in albino rats.
Anemia is defined as a condition in which the number of red blood cells (RBCs) or their oxygen-carrying capacity is insufficient to meet the physiological needs of the body. There are over 400 types of anemia, many of which are rare, but in all cases, there is lower than a normal number of circulating RBCs. Many types of anemia exist such as iron deficiency anemia, pernicious anemia, hemolytic anemia, aplastic anemia, megaloblastic anemia, sickle cell anemia, thalassemia, and sideroblastic anemia. Iron deficiency is thought to be the most common cause of anemia globally. 
The causes of anemia can be acquired or inherited. Other factors such as lack of access to balance diet, folate, Vitamin B12, Vitamin A deficiencies, chronic inflammation, parasitic infection, and inherited disorders can cause anemia.  Anemia occurs, and the body makes few RBCs, destroys many RBCs, or loses many RBCs. Iron deficiency anemia has serious consequences for the health and well-beings as well as the social and economic impact of India.  If anemia develops during pregnancy, blood does not have enough healthy RBCs to carry oxygen to tissues and to the fetus. Folate deficiency can directly contribute to the certain type of birth defects, such as neural tube abnormalities, (spina bifida) and low birth weight. Iron, folic acid, and vitamin deficiency anemia can be treated with changes in diet plan with the supplementation iron, folic acid, and vitamin.
Man since time immemorial has been using herbs or plant products as medicine for combating aliments, namely, cold, pain, and fever. A vast majority of the rural population depends largely on herbal remedies, and there are so many beneficial advantages related to the usage of these medicines. Herbal treatment is non-invasive and non-toxic, so it can be used safely as an alternative therapy or alongside conventional therapies. A good number of medicinal plants are traditionally employed to treatment for anemia, and some of these plants include dates, grapes, beetroot, broccoli, honey, and pomegranate.  It is noted that substances such as flavonoids and phenols have the hematinic activity.  Sesamum indicum Linn. belonging to the family Pedaliaceae is an important oilseed crop, having seed and oil that are highly valued as a traditional health food, and has a large number of medicinal use. Conventionally, the plant sesame used as wound healing medicines.  The studies on S. indicum have been carried out by various researchers, and a wide spectrum of its pharmacological actions has been explored such as anticancer, antidiabetic, and antihyperlipidemic activity.  Conventionally, S. indicum seed is used for the treatment of anemia in several parts of India.  Therefore, this research aims to reveal the hematinic and antioxidant activity of black S. indicum seed to verify the claim of its medicinal potential.
MATERIALS AND METHODS
The study was conducted on healthy rats, which were kept in the animal house of research laboratory of MES Medical College, Perinthalmanna, for 3 months.
The sesame seeds were brought from the local market of Calicut in the sealed, airtight bags for the analysis. The sample was washed thoroughly with water to remove dirt, rinsed with distilled water, and was allowed to drain and dried under the sun for a day and dried under shade for 2 days. Seeds are ground into fine powder by an electrical blender and kept in the clean plastic can until use.
Preparation of Aqueous Extract
The aqueous extract was prepared by maceration; 1000 g of powder was soaked in about 1 L of distilled water for 7 days. The extract was decanted and the remaining material was re soaked in distilled water. Both the extracts were dried completely by using Rotary vacuum evaporator.
Thirty adult albino rats of either sex weighing 100-200 g were used for this study. The animals were allowed to acclimatize in the research laboratory for 1 week before the commencement of the study. The animals had been maintained under standard conditions (room temperature 25 [degrees]C [+ or -]3, humidity 35-60%, and light and dark period 12/12 h). All animals were fed with food and water ad libitum. The study protocols were duly approved by the Institutional Animal Ethics Committee of the institute, MES Medical College, Perinthalmanna. The study was performed in accordance with the CPCSEA guidelines.
Acute Toxicity Studies
There was no mortality observed with oral administration of S. indicum even at the highest dose 2000 mg/kg. Both the doses of sesame had no toxic effect on the normal behavior of the rats. Hence, 200 and 400 mg dose per day were selected. 
Albino rats of either sex weighing between 100 and 200 g were divided into five group of six rats each. At first, anemia was induced in rats (except normal control or Group I) by intraperitoneal administration of 40 mg/kg of phenylhydrazine (PHZ) for 2 days ([D.sub.0] and [D.sub.1]). On the 2nd day, hemoglobin (Hb) level of treated rats is estimated, and the treated rat with PHZ whose Hb concentration <13 g/dL was considered as anemic and included in this study. Anemic rats were divided into Groups II-V and treated with the following chart for 14 days.
* Group I: Normal control received 10 mL/kg of corn suspension from day 2 to 14.
* Group II: Anemic control received 10 mL/kg of corn suspension from day 2 to 14.
* Group III: positive control treated with Vitamin B 12 syrup 1 mL/day from day 2 to 14.
* Group IV: Test group treated with aqueous extract of S. indicum (AESI) 200 mg/kg from day 2 to 14.
* Group V: Test group treated with AESI 400 mg/kg from day 2 to day 14.
Analysis of Hematological Parameters
After 14 days of treatment, a whole blood sample was collected from retro-orbital plexus under anesthesia. The number, shape, volume, and the color of the RBCs indicate the quality of blood. Samples were added to a tube containing ethylenediaminetetraacetic acid after 2 weeks of treatment. The RBC number, Hb, hematocrit (PCV), MVC, mean corpuscular Hb (MCH), and MCH concentration (MCHC) were determined at day 14 using an automatic blood cell counter. Antioxidant potential such as glutathione (GSH) and superoxide dismutase (SOD) was also analyzed using the standard procedure. [9,10]
Values were expressed as mean [+ or -] SD and statistically significant differences between mean values were determined by ANOVA and t-test using SigmaStat; P <0.05 were considered to be statistically significant.
The whole study was conducted on 36 healthy adult albino rats. A total of six rats were considered as normal control, anemia induced by intraperitoneal administration of phenylhydrazine (PHZ) in remaining 30 rats. On the basis of Hb estimation after 2 days of PHZ administration, 24 rats were selected as anemic. The hematological and antioxidant potential of tests were compared to control groups.
Administration of PHZ for 2 days caused a significant decrease (P < 0.05) Hb rate in rats of anemic control, standard, test Group I, and test Group II [Table 1]. After the 14 days of treatment with appropriate agents, the result shows an improvement of Hb levels in Vitamin B12 syrup-treated group and those which received an AESI [Table 1]. The AESI at dose 400 mg per day allows a faster recovery. In the negative control rats, the Hb, for instance, increased naturally and progressively.
After injection of PHZ to rats, there was a decrease in RBCs on day 2. Significant increases in RBCs were observed after treatment for 14 days. The result showed that the rats of the Group III-V have almost completely recovered at the 2nd week [Table 2].
The administration of PHZ also decreased hematocrit, MCV, MCH, and MCHC at day 2. 1 week of treatment of anemic rats Group III-V with extract reversed the effect of PHZ resulting in a significant increase in PCV, MCV, MCH, and MCHC [Table 3].
The administration of PHZ also decreased the level of antioxidant parameters such as GSH and SOD at day 2. 2 weeks of treatment on anemic rats reversed the effect of PHZ, resulting in a significant increase in GSH and SOD [Table 4].
The present study was aimed to evaluate the effect of S. indicum seed extracts on the hemolytic anemia induced by PHZ in albino rats. Iron deficiency anemia brings serious economic consequences and obstacles to national development by affecting more than 30% of the world population. [11,12] Hence, the study was relevant to find an effective agent to manage the anemic condition in a cost-effective manner. The study shows that S. indicum effectively improves the Hb, RBC, PCV, MCV, MCH, and MCHC levels compared to the negative control group. PHZ is recognized for its capacity to cause hemolysis both in vitro and in vivo by the formation of aryl and hydroxyl radicals, which have been demonstrated to be associated with its interaction with erythrocytes. It has been demonstrated that intraperitoneal administration of PHZ decreased the Hb concentration, RBC, and PCV. Peter et al. demonstrated that intraperitoneal administration of 40 mg//kg PHZ for 2 days reduces hematological indices.  Oxidative stress in erythrocytes is considered as an important mechanism of hemolysis. Disruption of membrane integrity arises from fragility, dehydration as well as increased production of reactive oxygen species. Chronic hemolysis leads to loss of Hb. The accumulation of hydrogen peroxide in addition to the detoxifying capacity of the red cell may lead to the oxidation of essential cellular constituents including membrane phospholipids. Such alterations presumably contribute to the eventual hemolysis of affected cells.
The results of the study indicated that increase in the hematological indices exhibited by S. indicum extract may be due to vitamins and mineral contents of the seed. Administration of sesame may indicate that the plant extract has the ability to stimulate the erythropoietic factors that have a direct influence on the production of blood in the bone marrow. Erythropoietin is a maturation factor of RBC synthesis, which increases the number of erythropoietin-sensitive committed stem cells in the bone marrow, that is converted to RBCs and subsequently to mature erythrocytes. The lowest administration dose of 200 mg/kg reduced the recovery time of the blood parameters. Furthermore, the recovery was progressive such that after 2 weeks of continuous treatment, the Hb concentration and PCV were higher in the treated groups than in the control groups. It was also observed that the recovery of the treated groups was dose related with the highest dose of 400 mg/day affecting the highest change.
A significant correlation with diagnostic values has been demonstrated between RBC, Hb, PCV, and red cell indices (MCV, MCH, and MCHC) in both humans and rats.  Animals are similar to humans in that reduction in Hb, RBC, and PCV is indicative of anemia.  MCHC (MCHC - the amount of Hb per unit erythrocyte volume) often reduced in hemolytic anemia or increased in the case of massive intravascular hemolysis. MCV (MCV - average volume of the erythrocyte) is often increased in hemolytic anemia as the result of reticulocytosis. MCH (MCH - the average amount of Hb per cell) often increased in hemolytic anemia. In the present study, a marked decrease in the concentration of GSH was observed in PHZ intoxicated rats when compared to control rats. Administration of sprouted S. indicum L. significantly increases the levels of GSH in PHZ-intoxicated rats. There is also a marked decrease in SOD observed in negative control when compared to normal control. Moreover, the SOD levels of treated groups are elevated when compared to negative control.
The injection of PHZ to rats caused a hemolytic anemia characterized by reducing hematological parameters. The oral administration of AESI in the dose of 200 mg and 400 mg significantly increased Hb level. And also, the results demonstrated that S. indicum inhibits the formation of ROS in rat showing potential antioxidant effect. This result supports the traditional use of sesame in the treatment of anemia. Further investigations are needed to understand the mechanism involved in the antianemic action of S. indicum.
Authors are thankful to Medi Research Direct for their scientific support during the entire project.
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How to cite this article: Prasad YPS, Hari P, Shajina M, Mirshad PV, Rahiman OMF. Hematinic and antioxidant potential of aqueous extract of Sesamum indicum seeds against phenylhydrazine-induced hemolytic anemia in albino rats. Natl J Physiol Pharm Pharmacol 2018;8(8):1092-1096.
Source of Support: Nil, Conflict of Interest: None declared.
Sridhar Prasad Y P (1), Padmaja Hari (2), Shajina M (3), Mirshad P V (4), Fasalu Rahiman O M (4)
(1) Department of Pharmacology, Sapthagiri Institute of Medical Sciences & Research Centre, Bengaluru, Karnataka, India, (2) Department of Physiology, MES Medical College, Perinthalmanna, Kerala, India, (3) Department of Biochemistry, Dr. M.V. Shetty College of Medical Lab Technology, Mangaluru, Karnataka, India, (4) Department of Pharmacology, MES Medical College, Perinthalmanna, Kerala, India
Correspondence to: Padmaja Hari, E-mail: email@example.com
Received: March 09, 2018; Accepted: March 31, 2018
Table 1: Hb level of rats before and after treatment with PHZ and after 14 days of treatment Group Hb level of rats Before After 2 days PHZ of PHZ treatment treatment Group II Anemic 13.85 [+ or -]0.546 8.78 [+ or -]0.552 (**) control Group III Standard 14.03 [+ or -]0.541 9.78 [+ or -]0.416 (**) Group IV Test Group I 13.85 [+ or -]0.381 9.28 [+ or -]0.702 (**) Group V Test Group II 13.96 [+ or -]0.598 9.25 [+ or -]0.653 (**) Group Hb level of rats After 14 days of treatment Group II Anemic 9.25 [+ or -]0.543 (*) control Group III Standard 13.88 [+ or -]0.348 (**) Group IV Test Group I 11.4 [+ or -]1.363 (*) Group V Test Group II 13.16 [+ or -]0.640 (**) Values are expressed as mean [+ or -]SD followed by one-way ANOVA (*) P<0.05, (**) P<0.005, PHZ: Phenylhydrazine, Hb: Hemoglobin Table 2: Values of RBC after 14 days of treatment Group RBC (x[10.sup.6]/mL) Group I Normal control 7.21 [+ or -]0.538 Group II Anemic control 5.15 [+ or -]0.602 Group III Standard 7.76 [+ or -]0.450 (**) Group IV Test Group I 6.46 [+ or -]0.722 (*) Group V Test Group II 7.45 [+ or -]0.971 (**) Values are expressed as mean [+ or -]SD followed by students paired t-test (*) P<0.05, (**) P<0.005 as compared to control, RBC: Red blood cell, SD: Standard deviation Table 3: Values of PCV and blood cell indices after 14 days of treatment Group PCV (%) MCV (fl) Group I Normal control 41.83 [+ or -]3.48 60.91 [+ or -]1.74 Group II Anemic control 30.83 [+ or -]3.060 57.01 [+ or -]2.20 Group III Standard 45.66 [+ or -]3.32 (**) 58.08 [+ or -]7.12 (**) Group IV Test Group I 38.83 [+ or -]2.85 (*) 59.03 [+ or -]9.02 (**) Group V Test Grout II 42.66 [+ or -]2.732 (**) 58.73 [+ or -]1.270 (**) Group MCH (pg) MCHC (g/dl) Group I Normal control 19.11 [+ or -]1.930 33.03 [+ or -]3.583 Group II Anemic control 18.01 [+ or -]1.316 30.06 [+ or -]1.462 Group III Standard 17.98 [+ or -]1.322 (**) 30.46 [+ or -]1.938 (**) Group IV Test Group I 17.78 [+ or -]2.209 (**) 29.48 [+ or -]3.162 (**) Group V Test Grout II 17.68 [+ or -]1.270 (**) 30.91 [+ or -]3.051 (**) Values are expressed as mean [+ or -]SD followed by students paired t-test (*) P<0.05, (**) P<0.005 as compared to control, MCHC: Mean corpuscular hemoglobin concentration, MCV: Mean corpuscular volume, MCH: Mean corpuscular hemoglobin Table 4: Antioxidant after 14 days of treatment Group GSH SOD Group I Normal control 15.21 [+ or -]0.426 9.43 [+ or -]0.637 Group II Negative control 11.13 [+ or -]0.460 5.63 [+ or -]0.725 Group III Positive control 13.28 [+ or -]0.541 (**) 7.81 [+ or -]0.574 (**) Group IV Test Group I 12.21 [+ or -]0.381 (*) 6.86 [+ or -]0.581 (*) Group V Test Group II 13.13 [+ or -]0.598 (**) 8.31 [+ or -]0.598 (**) Values are expressed as mean [+ or -]SD followed by students paired t-test (*) P<0.05, (**) P<0.005 as compared to control, SOD: Superoxide dismutase, SD: Standard deviation, GSH: Glutathione
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|Title Annotation:||RESEARCH ARTICLE|
|Author:||Sridhar Prasad, Y P; Padmaja, Hari; Shajina, M; Mirshad, P V; Fasalu Rahiman, O M|
|Publication:||National Journal of Physiology, Pharmacy and Pharmacology|
|Date:||Aug 1, 2018|
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