Effect of Selenium Nanoparticles with Cress Extract on Polycystic Ovary Syndrome (PCOS)

Document Type : Research Paper

Authors

Department of chemistry, college of science, University of Baghdad, Baghdad, Iraq

10.22052/JNS.2023.04.016

Abstract

Selenium is naturally present in the human body, animals, and plants, and is one of the important elements in their growth and maintenance. Recently, the nanoform of selenium has attracted attention due to its low toxicity and a high degree of adsorption compared to its organic and inorganic forms. The current study aimed to examine the effect of Cress leaves (Lepidium sativum L.) extract in combination with selenium nanoparticles in alleviating polycystic ovary syndrome in letrozole-induced PCOS in adult female rats. Nonthermal or cold plasma was used in the synthesis of selenium nanoparticles. Subsequently, the produced nanoparticles were identified, the 30 rats were divided into 6 equal groups, the first group was healthy (negative control); handled with distilled water given orally. To induce PCOS, rats were given letrozole (1 mg/kg) B.W daily for 21 days, The second group was left without any treatment (PCOS group), while the rats in the other 4 groups were treated orally and daily for 30 days using the following treatments: metformin (metformin group), Cress extract only (CE group), Cress extract with SeNPs (CE+SeNPs group), and SeNPs only (SeNPs group), respectively. Biochemical tests (Follicle stimulating, luteinizing, testosterone, and estrogen hormones as well as glucose and insulin levels) and histopathological analyses were performed. The results of the current study show a significant decrease in glucose and insulin levels, and a highly significant increase in LH, FSH, and testosterone levels while a significant decrease in estrogen levels in the Cress extract, SeNPs and metformin-treated groups with respect to PCOS induced group.  The present study demonstrated the effect of SeNPs and Cress extract in the treatment of PCOS. SeNPs and Cress leaves extract improved ovarian dysfunction and reduced the number of ovarian cysts.

Keywords


INTRODUCTION 
The most common endocrine disease (Polycystic ovary syndrome; PCOS) affects approximately 15-20% of women of reproductive age. It is one of the main causes of infertility [1] in which the clinical and biochemical factors of the syndrome are hyperandrogenism and an increase in testosterone hormone levels. It is related to hyperinsulinemia and insulin resistance and is linked to metabolic syndrome and abnormalities. Metabolic syndrome includes a group of symptoms like obesity, high blood pressure, high glucose and insulin levels in the blood, as well as insulin resistance [2,3]. When the two syndromes (polycystic and metabolic) are combined, they confer an increased risk of cardiovascular disease and diabetes type 2 [4]. 
Selenium (Se) is naturally present in the human body, animals, and plants, and is one of the important elements in their growth and maintenance [5]. Recently, the nanoform of selenium has attracted attention due to its low toxicity and a high degree of adsorption compared to its inorganic and organic forms [6]. Its nanoparticles (SeNPs) are important in numerous physiological processes that are very important for the survival of human beings, such as reproduction, growth and immunity [7]. In medical treatments and pharmaceutical fields and due to their lowering risk compared to Se, SeNPs provide various applications such as the following: a nutritional supplement, an antioxidant, an anticancer agent, an antimicrobial agent [8], and an antidiabetic agent [9]. For PCOS women, Se supplementation had beneficial effects on insulin levels [10]. From a previous study, it has been found that SeNPs with fenugreek leaf extract have a beneficial effect in treating oxidative stress in letrozole-induced PCOS in adult female rats [11]. Therefore, selenium could provide a novel therapeutic strategy for PCOS. Cress (Lepidium sativum L.) is a small herbaceous plant with a height of 50 cm. Cress is an annual, fast-growing, and edible herb belonging to the family (Brassicaceae) and the genus (Lepidium). Furthermore, Cress contains a high percentage of minerals as well as vitamins A and C which are useful for purifying blood and treating anemia. It is considered an edible vegetable in addition to its medicinal uses. In addition, Cress is used in many countries to treat diabetes, hypertension [12], and kidney disease [13]. in the literature, there is a lack of linking the plant to the syndrome under study. This is the first study to demonstrate the effect of Selenium nanoparticles prepared by cold plasma in combination with aqueous Cress fresh leaf extract on polycystic ovary syndrome (PCOS)
Since PCOS is one of the major causes of infertility, finding a treatment for it is needed; the primary purpose of treatment is to return reproductive function and improve metabolic complications. The current study aimed to examine the effect of Cress leaves (Lepidium sativum L.) extract in combination with selenium nanoparticles in alleviating polycystic ovary syndrome in letrozole-induced PCOS in adult female rats. 

MATERIAL AND METHODS
Preparation of Cress extract (CE) 
Cress fresh leaves (Lepidium sativum L.) were obtained from a local market in Baghdad city. then washed with distilled water (D.W.) and residual moisture was evaporated at room temperature. A weight of 1 g of the plant sample was boiled in distilled water (100 ml) for 10 min. After cooling, the aqueous extract was filtered via a Millipore filter to eliminate particulate matter and kept at 4C0 for future work [14].

Preparation and Characterization of Selenium Nanoparticles
Linking the system
Nonthermal or cold plasma was used in the synthesis of selenium nanoparticles [15-17]. The plasma system consisted of five parts as follows: Argon gas and gas flowmeter with 1–5 min calibrator /1 for gas intake controlling. This flowmeter was in connection with A stainless steel hole metal tube 10 cm×1mm. They are connected to the power supply (cathode) equipped with intermittent and continuous high voltage. The tubes could produce up to 25 kV voltage and cutting of 25 kHz voltage. They had a stainless steel conductive that connect to the anode (length of 7 cm and width of 5 mm and strip ends with a 1 × 1 flat end). The fourth part was a metal tube holder, which carried the glass beaker that contained the solution. This tube was placed vertically by a 1mm diameter catcher; for gas regulation, its upper end connects with a rubber tube. The fifth part was the selenium nitrate solution that was placed in a 25 ml beaker on a movable holder under the metal tube. 

Preparation of SeNPs
For SeNPs preparation, 10 ml of selenium was nitrated with 0.5 mM concentration. As mentioned above, the prepared form was placed on the holder under the metal tube. For different exposure times to plasma (6, 8, 10, 12) minutes, the distance was 1 mm (between the liquid surface and the nozzle of the tube). Gas in the metal tube was regulated by the flowmeter to control the gas flow. The supplied voltage of the system was gradually increased until the plasma was generated between the surface of the liquid and the tube.

Characterization of SeNPs
For the synthesized SeNPs, X-ray diffraction (XRD) patterns were obtained on a Podwe XRD, 2700AB HAOYUAN co, China.  Radiation with the X-ray generator was operated at 45 kV and 40 mA with a 2-theta configuration.

Animals
Thirty female rats’ weights (170-200) grams were cached from the animal’s house at the University of Al-Nahrain, they were reserved underneath the appropriate environmental condition of the moisture between (50;50) in dark, while in the light and dark’ was (45 -55%), and 22-25°C. The animals were kept in (25×30×50 cm) plastic cages (which were altered every week), and the foodstuff was given as pellets. The 30 rats were divided into 6 equal groups, the first group was healthy (negative control); handled with distilled water given orally. To induce the PCOS, rats were given letrozole (1 mg/kg) B.W daily for 21 days, (the letrozole was dissolved in 1% carboxymethylcellulose (CMC) [18]. The second group was left without any treatment (PCOS group), while the rats in the other 4 groups were treated orally and daily for 30 days using the following treatments: metformin (100mg/kg; metformin group), Cress extract only (2ml/kg; CE group), Cress extract with SeNPs (1:1 ratio, 2ml/kg; CE+SeNPs group), and SeNPs only (2ml/kg; SeNPs group), where used SeNPs at 10 min of exposure to plasma. the letrozole-treated rats were euthanized after 30 days after the treatment.

Determination of relative rat weight (RRW)
Changes in body weight were measured using a sensitive balance every week for all groups throughout the experiment. The relative rat weight (RRW) was also calculated using the following equations: [15].

Where: WR represents RRW, W(di) denotes the rat weight on an ith day, and W(d0) is the rat weight on the day the treatment started. 

Determination of some biochemical parameters
By ELISA (enzyme-linked immunosorbent assay), serum insulin concentration (mIU/mL) was evaluated using a commercial kit specified for rats (AccuBind, USA). Serum glucose level was measured using an Enzymatic colorimetric determination (Agappe, India). The value was expressed as mg/dL 
Serum hormone levels of Follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone, and estrogen were determined using an ELISA kit (AccuBind, USA). 

Histopathological analysis 
The histological examinations were carried out based on standard methods according to [19]. The ovarian samples were fixed in the formalin 10% solution for 48 h. After fixation, the tissues were processed by dehydration, embedding and sectioning, then stained by the H&E staining routine, then evaluating the sections of each ovarian tissue from the cortex of the ovary to the medulla in a spiral and clockwise direction. All sections were assessed by an optical microscope (NIKON).

Statistical Analysis
All statistics were carried out by GraphPad Prism v 7.00 “GraphPad Software, USA”. In data analysis, the star symbols stated the degree signification as follows: *, **, ***, **** were representing: (P≤0.05), (P≤0.01), (P≤0.001), (P≤0.0001), respectively.

RESULTS AND DISCUSSION 
Characterization of the synthesized SeNPs 
In the current research, SeNPs were prepared using cold plasma, and their formation was observed by color-changing the solutions from colorless to orange. The surface plasmon resonance causes these colors to change in the selenium nitrate solution and the selenium particles, as it is clear in the figure, the color darkness differs based on the exposure duration time from 6 to 12 min.  
  To confirm the presence of nano-crystalline selenium particles, the XRD analysis for dried selenium particles was prepared using cold plasma. The peaks of XRD 2θ were observed at 30° after 8 and 10 min of exposure to plasma (Fig. 1). This indicated the presence of selenium nanoparticles. This result is in agreement with those reported by other authors [20].
The particle size of SeNPs were estimated by a field emission scanning electron microscope (FE-SEM); the results are shown in (Fig. 2). FE-SEM micrographs of SeNPs revealed a size distribution of 174-600 nm for (6, 8, 10, 12) min exposure to plasma, this result is in agreement with those reported by other authors [21,22]. 
The nanoparticle’s size can be easily measured from the Atomic Force Microscopy (AFM) image by determining the height of the nanoparticles’ image [23]. The AFM image is a representation of three-dimensional data, therefore the height of the nanoparticles can be quantitatively measured. Fig. 3. shows 3D AFM image distribution of the selenium nanoparticles. Generally, the image indicated that SeNPs were spherical with an average height are (90, 50, 18, 70) nm for (6, 8, 10, 12) min exposure to plasma respectively, which is in agreement with a previous study [24].
Effect of CE, SeNPs, and metformin on Relative rat weight (RRW)
Administration of letrozole to induce PCOS significantly increased the body weight of the PCOS group as compared to the control. In treated groups, (CE, SeNPs, and Metformin) showed a constant increase in body weight as compared to the control.

Effect of Cress extract, Selenium Nanoparticles, and Metformin on parameters
Fig. 4. Shows that the PCOS group exhibited a significant increase in glucose and insulin levels compared to the control group. On the other hand, a significant decrease in glucose and insulin levels was observed in the Cress extract, SeNPs and metformin treated groups with respect to PCOS induced group.
 The PCOS-induced group showed a highly significant increase in LH, FSH, and testosterone levels while a significant decrease in estrogen levels compared to the control group was observed. On the other hand, the treated groups (CE, SeNP, and Metformin) showed a significant decrease in LH, FSH and testosterone levels and a significant increase in estrogen levels with respect to PCOS induced group (Fig. 5).     
Effect of CE, SeNPs, and metformin on histopathology of ovaries
Fig. 6. Illustrates the histological examination of all groups of rats. The section of ovaries in the control group showed the outer cortex which was covered by germinal epithelium, and stromal tissue that revealed a number of primary and secondary follicles in addition to a single tertiary follicle and corpus leutium (Fig. 6A). Whereas, in the PCOS-induced group Fig. 6B shows multiple variables sizes follicular cysts with a very thin layer of granulosa cells and supported by fibrous layer. Fig. 6C of rat treated with Cress extract shows multiple small, intermediate, and large sizes follicular cysts with very thick granulosa cells layer and numerous corpus lutium.  Rat treated with SeNPs (Fig. 6D) revealed multiple small-size follicular cysts that originated from secondary follicles composed of a thin granulosa layer, additionally, there were numerous corpus leutium. The sections of the ovaries of rats treated with CE and SeNPs (Fig. 6E) showed a normal appearance of the tertiary follicle, primary follicle, small secondary follicles, and corpus lutium. Rats treated with metformin (Fig. 6M) showed corpus luteum and follicle with multiple layers of granular cells. 
The purpose of the current study was to examine the effect of Cress leaf extract in combination with selenium nanoparticles in alleviating polycystic ovary syndrome in letrozole-induced PCOS in adult female rats.
Administration by letrozole to induce polycystic ovary in rats caused an increase in body weight, a previous study showed that the model rats with PCOS generally gained more weight than the control rats [24,25]. letrozole could be induced increasing in organs’ weight, such as the heart, liver, spleen, and kidney [26]. Another study reported that the reduced levels of circulating estrogen can induce lipid metabolic changes, resulting in an increase in the body weight of letrozole-induced rats [27,28]. These could be the reasons why the PCOS rat group elevated their weight after administration with letrozole. 
 Our results indicated raised glucose and insulin levels in PCOS-induced rats compared to the control group, this agreement with previous studies [2,29-31]. Whereas we found a reduction in glucose and insulin levels after treatment with Cress leaf extract, SeNPs, and metformin. From previous studies, it has been found that Selenium plays important role in the functioning of islets of Langerhans, gastrointestinal tract, and ovaries, Se also has an activity of initiating insulin signaling cascades in the cell, glucogenesis [32], and glucose uptake in adipocytes [33]. This also suggests that SeNPs cause hypoglycemia through enhanced glucose uptake activity [34]. Another study also demonstrated administration of cress seed extract significantly decreased blood sugar in diabetic rats due to the presence of alkaloids, flavonoids, cysteine, and glycine [13]. Thus, CE and SeNPs treated groups showed an improvement in symptoms associated with the metabolic syndrome, including body weight, insulin, and glucose blood levels.
Our results showed a significantly high level of FSH and LH in PCOS-induced rats in contrast to the control, this agreement with a previous study [35,36]. The elevated LH levels are explained by an increased pituitary sensitivity to hypothalamic gonadotropin-releasing hormone (GnRH), and increased pulse frequency of GnRH which may cause enhanced LH secretion [37]. According to previous studies, it was stated in PCOS women, high levels of FSH caused to form the of ovarian cysts, in fact, elevated androgens in this condition led to an increase in GnRH neurons activities and finally caused to increase in FSH secretion from the pituitary [38]. Increased LH stimulates theca cells of ovaries to undergo rapid proliferation which further results in increased steroidogenic capacity and hence increased androgen production [39]. However, after being treated with CE, SeNPs, and metformin, all FSH and LH show a significant decrease in their levels [40]. 
A high concentration of testosterone hormone in the PCOS group showed that the androgen level increased because letrozole blocks the conversion of androgen substrate into estrogen [41]. In the meanwhile, the metformin, CE, and SeNPs treated groups assisted in the reduction of testosterone levels in PCOS rats compared to the PCOS-induced group which showed an improvement in androgen levels [42]. Testosterone and Se have a negative correlation as the Se increases as the testosterone level decreases and vice versa [43]. In the metformin, CE and SeNPs treated groups the estrogen concentration significantly increased, as Se is responsible for the excessive release of estrogen by acting on granulosa cells [44]. this result was similar to previous studies[45,46].
A healing effect of ovaries and a decrease in the number of cystic follicles were noticed in CE and SeNP-treated groups. Histopathology of ovarian tissues revealed that there was a resemblance in human and rat PCOS when induced with letrozole. The results of histopathology indicated that the anovulation might be due to active FSH and LH levels and the reduced interplay between cells of ovaries such as theca cells and granulosa cells [16]. A thin layer of granulosa cells lined up the sub capsular cysts which resulted in hyperplasia of theca cells. these findings were similar to the previous studies [47].
 Abnormal levels of androgen hormone in ovaries led to increased follicular atresia and decreased follicular growth [48]. In the present study, the post-treatment of metformin, CE and SeNPs showed a decrease in the number of corpus luteum and the number and diameter of cystic follicles which were also in relation to the previous studies [49].  In recent studies, Se-based herbal medicines were used for PCOS patients, which depicted that Se was best known for a reduction in ovarian cysts [50-53].

CONCLUSION
The present study demonstrated the effect of SeNPs and Cress extract in the treatment of PCOS. SeNPs and Cress leaves extract improved ovarian dysfunction and reduced the number of ovarian cysts. This study showed protective potentials that improved the hormonal concentrations of testosterone, estrogen, LH, and FSH in female rats, and also displayed a significant role in reducing the hyperglycemic and hyperandrogenic conditions denoting that the possible ameliorative medication for the treatment of clinical and biochemical characteristics of the polycystic ovarian syndrome. Further studies are needed to investigate the therapeutic potential of SeNPs so that can be used for the treatment of PCOS to lessen the side effects of other modern drugs. 

ACKNOWLEDGMENT
We appreciate the sincere collaboration of the Chemistry Department, the College of science, university of Baghdad. This study was financially supported by the authors. The funding body had no role in the project’s design, sampling, analysis, interpretation of data, or writing and editing of the manuscript.

CONFLICT OF INTEREST
The authors declare that there is no conflict of interests regarding the publication of this manuscript.

1.    Revised 2003 consensus on diagnostic criteria and long-term health risks related to polycystic ovary syndrome (PCOS). Hum Reprod. 2004;19(1):41-47.
2.    Stepto NK, Cassar S, Joham AE, Hutchison SK, Harrison CL, Goldstein RF, et al. Women with polycystic ovary syndrome have intrinsic insulin resistance on euglycaemic-hyperinsulaemic clamp. Hum Reprod. 2013;28(3):777-784.
3.    Serum level evaluation of interleukin-18 in obese women with polycystic ovary syndrome. Iraqi Journal of Science. 2018;59(4B).
4.    Mirzaei F, Kazemi N. Prevalence of Polycystic Ovary Syndrome in Women with Type 2 Diabetes in Kerman, Iran. Metabolic Syndrome and Related Disorders. 2008;6(3):215-217.
5.    Xu C, Qiao L, Guo Y, Ma L, Cheng Y. Preparation, characteristics and antioxidant activity of polysaccharides and proteins-capped selenium nanoparticles synthesized by Lactobacillus casei ATCC 393. Carbohydr Polym. 2018;195:576-585.
6.    Bhattacharjee A, Basu A, Bhattacharya S. Selenium nanoparticles are less toxic than inorganic and organic selenium to mice in vivo. The Nucleus. 2019;62(3):259-268.
7.    Hosnedlova B, Kepinska M, Skalickova S, Fernandez C, Ruttkay-Nedecky B, Malevu TD, et al. A Summary of New Findings on the Biological Effects of Selenium in Selected Animal Species-A Critical Review. Int J Mol Sci. 2017;18(10):2209.
8.    Geoffrion LD, Hesabizadeh T, Medina-Cruz D, Kusper M, Taylor P, Vernet-Crua A, et al. Naked Selenium Nanoparticles for Antibacterial and Anticancer Treatments. ACS omega. 2020;5(6):2660-2669.
9.    Menon S, K.S SD, Agarwal H, Shanmugam VK. Efficacy of Biogenic Selenium Nanoparticles from an Extract of Ginger towards Evaluation on Anti-Microbial and Anti-Oxidant Activities. Colloid and Interface Science Communications. 2019;29:1-8.
10.    Semwal P, Painuli S, Cruz-Martins N. Dioscorea deltoidea wall. Ex Griseb: A review of traditional uses, bioactive compounds and biological activities. Food Bioscience. 2021;41:100969.
11.    Clinical Evaluation of Standardized Fenugreek Seed Extract as Furostanolic Saponins (Furocyst) In Polycystic Ovary Syndrome Patients. Journal of Gynecology & Reproductive Medicine. 2018;2(1).
12.    Kamani M, Hosseini ES, Kashani HH, Atlasi MA, Nikzad H. Protective Effect of Lepidium sativum Seed Extract on Histopathology and Morphology of Epididymis in Diabetic Rat Model. International Journal of Morphology. 2017;35(2):603-610.
13.    Patel U, Kulkarni M, Undale V, Bhosale A. Evaluation of Diuretic Activity of Aqueous and Methanol Extracts of Lepidium sativum Garden Cress (Cruciferae) in Rats. Tropical Journal of Pharmaceutical Research. 2009;8(3).
14.    Eddouks M, Maghrani M, Zeggwagh NA, Michel JB. Study of the hypoglycaemic activity of Lepidium sativum L. aqueous extract in normal and diabetic rats. J Ethnopharmacol. 2005;97(2):391-395.
15.    Adil BH, Al-Shammari AM, Murbat HH. Breast cancer treatment using cold atmospheric plasma generated by the FE-DBD scheme. Clinical Plasma Medicine. 2020;19-20:100103.
16.    Adil BH, Al-Halbosiy MMF, Murbat HH. The use of cold atmospheric plasma in pentostam enhancement as Leishmaniasis treatment in vitro.  AIP Conference Proceedings: AIP Publishing; 2019. p. 020033.
17.    Ali Thamer N, Adil BH, Obaid AS. Gold Nanoparticles Synthesis Using Environmentally Friendly Approach for Inhibition Human Breast Cancer. International Journal of Nanoscience. 2020;19(05):1950040.
18.    Kafali H, Iriadam M, Ozardalı I, Demir N. Letrozole-induced polycystic ovaries in the rat: a new model for cystic ovarian disease. Arch Med Res. 2004;35(2):103-108.
19.    Bancroft JD, Suvarna SK, Layton C, Bancroft JD, Suvarna SK, Layton C. Acknowledgments. Bancroft’s Theory and Practice of Histological Techniques: Elsevier; 2019. p. ix-x.
20.    Mellinas C, Jiménez A, Garrigós MDC. Microwave-Assisted Green Synthesis and Antioxidant Activity of Selenium Nanoparticles Using Theobroma Cacao L. Bean Shell Extract. Molecules (Basel, Switzerland). 2019;24(22):4048.
21.    Chen H, Yoo J-B, Liu Y, Zhao G. Green synthesis and characterization of se nanoparticles and nanorods. Electronic Materials Letters. 2011;7(4):333-336.
22.    Kalishwaralal K, Jeyabharathi S, Sundar K, Muthukumaran A. A novel one-pot green synthesis of selenium nanoparticles and evaluation of its toxicity in zebrafish embryos. Artificial Cells, Nanomedicine, and Biotechnology. 2014;44(2):471-477.
23.    Yunusov KE, Sarymsakov AA, Turakulov FM. Synthesis and Physicochemical Properties of the Nanocomposites Based on Sodium Carboxymethyl Cellulose and Selenium Nanoparticles. Polymer Science, Series B. 2022;64(1):68-77.
24.    Rydz J, Šišková A, Andicsová Eckstein A. Scanning Electron Microscopy and Atomic Force Microscopy: Topographic and Dynamical Surface Studies of Blends, Composites, and Hybrid Functional Materials for Sustainable Future. Advances in Materials Science and Engineering. 2019;2019:1-16.
25.    Wang M-X, Yin Q, Xu X. A Rat Model of Polycystic Ovary Syndrome with Insulin Resistance Induced by Letrozole Combined with High Fat Diet. Medical science monitor : international medical journal of experimental and clinical research. 2020;26:e922136-e922136.
26.    Younas A, Hussain L, Shabbir A, Asif M, Hussain M, Manzoor F. Effects of Fagonia indica on Letrozole-Induced Polycystic Ovarian Syndrome (PCOS) in Young Adult Female Rats. Evidence-based complementary and alternative medicine : eCAM. 2022;2022:1397060-1397060.
27.    Ortega I, Sokalska A, Villanueva JA, Cress AB, Wong DH, Stener-Victorin E, et al. Letrozole increases ovarian growth and Cyp17a1 gene expression in the rat ovary. Fertil Steril. 2013;99(3):889-896.
28.    Heo JH, Lee SR, Jo SL, Yang H, Lee HW, Hong E-J. Letrozole Accelerates Metabolic Remodeling through Activation of Glycolysis in Cardiomyocytes: A Role beyond Hormone Regulation. Int J Mol Sci. 2022;23(1):547.
29.    Palmisano BT, Zhu L, Stafford JM. Role of Estrogens in the Regulation of Liver Lipid Metabolism. Advances in experimental medicine and biology. 2017;1043:227-256.
30.    Aboud RS, Salloom DF, Abbas AH. Detection of Type 2 Diabetes Mellitus in Serum from Women with Polycystic Ovarian Syndrome. Baghdad Science Journal. 2013;10(2):324-324.
31.    Zainulabdeen JA. Is serum amylase normal in women with polycystic ovarian syndrome? Baghdad Science Journal. 2014;11(4):1583-1591.
32.    Zainab Khidhair H. Physiological and Molecular Study of Iraqi Women with Polycystic Ovary Syndrome. Medico Legal Update. 2021;21(2):204-209.
33.    Becker DJ, Reul B, Ozcelikay AT, Buchet JP, Henquin JC, Brichard SM. Oral selenate improves glucose homeostasis and partly reverses abnormal expression of liver glycolytic and gluconeogenic enzymes in diabetic rats. Diabetologia. 1996;39(1):3-11.
34.    Mistry HD, Broughton Pipkin F, Redman CWG, Poston L. Selenium in reproductive health. Am J Obstet Gynecol. 2012;206(1):21-30.
35.    Kim JE, Choi SI, Lee HR, Hwang IS, Lee YJ, An BS, et al. Selenium Significantly Inhibits Adipocyte Hypertrophy and Abdominal Fat Accumulation in OLETF Rats via Induction of Fatty Acid β-Oxidation. Biol Trace Elem Res. 2012;150(1-3):360-370.
36.    Pournaderi PS, Yaghmaei P, Khodaei H, Noormohammadi Z, Hejazi SH. The effects of 6-Gingerol on reproductive improvement, liver functioning and Cyclooxygenase-2 gene expression in estradiol valerate – Induced polycystic ovary syndrome in Wistar rats. Biochemical and Biophysical Research Communications. 2017;484(2):461-466.
37.    Alsaadi YL, Mohamad BJ. Prevalence of hyperandrogenism in Iraqi women with polycystic ovary syndrome. Iraqi Journal of Science. 2019:2600-2608.
38.    Balen A. Metformin and gonadotrophin-releasing hormone (GnRH) antagonist co-treatment in in-vitro fertilisation (IVF) for women with polycystic ovary syndrome (PCOS). Springer Science and Business Media LLC; 2012.
39.    Ciechanowska M, Łapot M, Malewski T, Mateusiak K, Misztal T, Przekop F. Effects of GABAA receptor modulation on the expression of GnRH gene and GnRH receptor (GnRH-R) gene in the hypothalamus and GnRH-R gene in the anterior pituitary gland of follicular-phase ewes. Anim Reprod Sci. 2009;111(2-4):235-248.
40.    Ashraf S, Nabi M, Rasool SuA, Rashid F, Amin S. Hyperandrogenism in polycystic ovarian syndrome and role of CYP gene variants: a review. Egyptian Journal of Medical Human Genetics. 2019;20(1).
41.    Abd El-Hakim YM, Abdel-Rahman Mohamed A, Khater SI, Hamed Arisha A, Metwally MMM, Nassan MA, et al. Chitosan-Stabilized Selenium Nanoparticles and Metformin Synergistically Rescue Testicular Oxidative Damage and Steroidogenesis-Related Genes Dysregulation in High-Fat Diet/Streptozotocin-Induced Diabetic Rats. Antioxidants (Basel, Switzerland). 2020;10(1):17.
42.    Corbin CJ, Trant JM, Walters KW, Conley AJ. Changes in Testosterone Metabolism Associated with the Evolution of Placental and Gonadal Isozymes of Porcine Aromatase Cytochrome P4501. Endocrinology. 1999;140(11):5202-5210.
43.    Zhang S, Tu H, Yao J, Le J, Jiang Z, Tang Q, et al. Combined use of Diane-35 and metformin improves the ovulation in the PCOS rat model possibly via regulating glycolysis pathway. Reproductive biology and endocrinology :. 2020;18(1):58-58.
44.    Coskun A, Arikan T, Kilinc M, Arikan DC, Ekerbiçer HÇ. Plasma selenium levels in Turkish women with polycystic ovary syndrome. European Journal of Obstetrics & Gynecology and Reproductive Biology. 2013;168(2):183-186.
45.    Ceko MJ, Hummitzsch K, Hatzirodos N, Bonner WM, Aitken JB, Russell DL, et al. X-Ray fluorescence imaging and other analyses identify selenium and GPX1 as important in female reproductive function. Metallomics. 2015;7(1):71-82.
46.    Ullah A, Jahan S, Razak S, Pirzada M, Ullah H, Almajwal A, et al. Protective effects of GABA against metabolic and reproductive disturbances in letrozole induced polycystic ovarian syndrome in rats. Journal of ovarian research. 2017;10(1):62-62.
47.    Jahan S, Munir F, Razak S, Mehboob A, Ain QU, Ullah H, et al. Ameliorative effects of rutin against metabolic, biochemical and hormonal disturbances in polycystic ovary syndrome in rats. Journal of ovarian research. 2016;9(1):86-86.
48.    Baravalle C, Salvetti NR, Mira GA, Pezzone N, Ortega HH. Microscopic Characterization of Follicular Structures in Letrozole-induced Polycystic Ovarian Syndrome in the Rat. Arch Med Res. 2006;37(7):830-839.
49.    Homburg R. Androgen circle of polycystic ovary syndrome. Hum Reprod. 2009;24(7):1548-1555.
50.    Jahan S, Kiyani MM, Butt MA, Ullah A. Ameliorative effects of selenium nanoparticles on letrozole induced polycystic ovarian syndrome in adult rats. International Journal of Biomedical Nanoscience and Nanotechnology. 2020;4(1/2):49.
51.    Broekmans FJ, Visser JA, Laven JSE, Broer SL, Themmen APN, Fauser BC. Anti-Müllerian hormone and ovarian dysfunction. Trends in Endocrinology & Metabolism. 2008;19(9):340-347.
52.    Rolland C. Weight loss in obese women with Polycystic Ovary Syndrome (PCOS). Springer Science and Business Media LLC; 2012.
53.    Rezvanfar MA, Rezvanfar MA, Ahmadi A, Shojaei-Saadi HA, Baeeri M, Abdollahi M. Molecular mechanisms of a novel selenium-based complementary medicine which confers protection against hyperandrogenism-induced polycystic ovary. Theriogenology. 2012;78(3):620-631.