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Bauhinia Variegata Linn Pandey Applied Cancer Research (2017) 37:33 Applied Cancer Research DOI 10.1186/s41241-017-0039-3 RESEARCH ARTICLE Open Access In vivo antitumor potential of extracts from different parts of Bauhinia variegata linn. Against b16f10 melanoma tumour model in c57bl/6 mice Sonam Pandey1,2 Abstract Background: Melanoma is a metastatic type of skin cancer that is difficult to treat and the majority of efforts are directed to the design of new drugs. Medicinal Plants have been the primary source of medicines since life on earth; more than 50% of existing cancer treatments is derived from plants. Bauhinia variegata is well-known medicinal plant used from the ancient era to till date for their medicinal values. Scientific literatures have not documented any evidence of the antitumour potential of Bauhinia variegata against B16F10 melanoma tumor model in C57BL mice. The present investigation was undertaken to explore the antitumour activity of Leaf, stem bark and flower extract of Bauhinia variegata against B16F10 melanoma tumour model in C57BL mice. Methods: Hydro-methanolic extract prepared from the leaf, stem bark and flower of Bauhinia variegata were assessed for their antitumor activity. The extracts at doses of 500 and 750 mg/kg b.wt. were given orally along with cyclophosphamide (chemotherapeutic drug) for 40 days for exploring antitumor activity against melanoma tumor (B16F10) in C57BL mice. Inhibition of tumor growth, increase in survival time of animal with treatment, histopathological studies and antioxidant parameter were determined. Results: The Present investigation showed significant effect of the B. variegata L. in preventing melanoma tumor by B16F10 cell line in C57BL/6 mice. As compared with the tumour control group, the remarkable results especially in the group which received B. variegata extract and cyclophosphamide together were obtained for all of the measured parameters. Dose dependent response was observed in tumor volume, inhibition rate, life span time and antioxidant parameter of extracts. Combination treatment of cyclophosphamide and B. variegata extracts showed more pronounced effect. Conclusions: These findings suggest that B. variegata hydromethanolic extract may contain bioactive compounds of potential therapeutic significance which are relatively safe from toxic effects, and can compromise the medicinal use of this plant in folk medicine. Keywords: Chemoprevention, Bauhinia variegata, Melanoma, B16F10 cell line, GSH Correspondence: [email protected] 1Gujarat State Biotechnology Mission, Gandhinagar, Gujarat, India 2Research Department, Jawaharlal Nehru Cancer Hospital and Research Centre, Idgah Hills, Bhopal, Madhya Pradesh, India © The Author(s). 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Pandey Applied Cancer Research (2017) 37:33 Page 2 of 14 Background attention in recent years, due to their diverse pharmacological Cancer is a growing health problem in both developing properties including cytotoxic and cancer chemopreventive and developed countries. Melanoma is the most aggressive effects [24]. Plant based systems continue to play an essential and deadly form of skin cancer. Patients with distant me- role in healthcare and it has been estimated by WHO that tastases have a five-year survival rate of 16% [1] and a me- approximately 80% of the world’s inhabitants rely mainly on dian survival of four to six months [2]. Until very recently, traditional medicine for their primary health care [25]. melanoma has been branded by the failure of chemother- The use of natural products in cancer therapy showed that apy and other therapeutic attempts. Currently, the main plants are a most important source of antitumor com- treatments for cancer are chemotherapy, radiotherapy and pounds, with new structures and mechanisms of action be- surgery. Chemotherapy is routinely used for cancer treat- ing discovered [26]. Several plant-derived products induce ment. Since cancer cells lose many of the regulatory func- apoptosis in neoplastic cells but not in normal cells [27–29]. tions present in normal cells, they continue to divide Bauhinia variegata (Family fabaceae, Genus Bauhinia) when normal cells do not. This feature makes cancer cells is an herbaceous plant, found throughout India. The plant susceptible to chemotherapeutic drugs. Approximately is known as Kachnara in Sanskrit and Hindi. All parts of five decades of systemic drug discovery and development the plant (leaves, flower buds, flower, stem, stem bark, seeds have resulted in the establishment of a large collection of and roots) were used in traditional medicine. For using useful chemotherapeutic agents. Currently, some of these various ailments like bronchitis, leprosy, and tumors. The plant-derived compounds are widely used for chemother- stem bark was used as astringent, tonic, anthelmintic and apy of cancerous patients. However, chemotherapeutic antidiabetic [30]. Infusion of the leaves was used as a laxa- treatments are not devoid of their own intrinsic problems. tive and for piles. Dried buds were used in the treatment of Various kinds of toxicities may occur as a result of chemo- worm infestations, tumors, diarrhea, and piles. It is helpful therapeutic treatments. For example, 5-fluorouracil, a in managing skin discoloration [31–33]. common chemotherapeutic agent, is known to cause mye- The phytochemical screening revealed that Bauhinia lotoxicity [3], cardiotoxicity [4] and has even been shown variegata contained terpenoids, flavonoids, tannins, sapo- to act as a vasospastic agent in rare but documented cases nins, reducing sugars, steroids and cardiac glycosides. [5]. Another widely used chemodrug, doxorubicin causes Pharmacological studies showed that Bauhinia variegata cardiac toxicity [6–8], renal toxicity [9], and myelotoxicity. exerted anticancer, antioxidant, hypolipidemic, antimicro- [10] Similarly, bleomycin a well-known chemotherapeutic bial, anti-inflammatory, nephroprotective, hepatoprotective, agent, is known for its pulmonary toxicity [11–13]. In antiulcer, immunomodulating, molluscicidal and wound addition, bleomycin shows cutaneous toxicity [14]. Cyclo- healing effects [34, 35]. Previous phytochemical studies on phosphamide, a drug to treat many malignant conditions, the stems [36–38], flowers [34, 39], leave and seeds [40, 41] has been shown to have bladder toxicity in the form of of this species have led to the isolation of several flavonoids. hemorrhagic cystitis, immunosuppression, alopecia and at There are also a few reports of antitumor activity of B. var- high doses cardiotoxicity [15]. iegata ethanolic extract against Dalton’s ascetic lymphoma A major problem associated with cancer chemotherapy (DAL) in Swiss albino mice [42] and N-nitrosodiethylamine is the severe side effects resulting from normal tissue induced experimental liver tumors in rats and human cancer damage. Consequently, agents which protect normal tis- cell lines [43]. The present study evaluates the chemopreven- sues against chemotherapy can increase the patient’s toler- tive effect of the different parts and different doses of B. ance to chemotherapy. Several chemicals have been found variegata on B16F10 melanoma tumor on C57BL mice. to provide notable protection in experimental animals, but their clinical utility is limited by the drug toxicity on Methods repeated administration [16]. Therefore, there is a need to Animals find nontoxic and inexpensive drug/(s) for clinical chemo The study was conducted on random bred, 6–7 weeks old protection. Recent studies have indicated that some of the and 24–28 g b.wt. bearing, male C57BL/6 mice. Animals commonly used medicinal plants may be good source of were maintained under controlled conditions of temperature potent but nontoxic chemoprotectors [17–20]. and light (Light: dark, 10 h: 14 h.). They were provided Natural products discovered from medicinal plants have standard mice feed (procured from Hindustan Levers Ltd.) played an important role in treatment of cancer, which is pro- and water ad libitum. jected to become the major cause of death worldwide. A wide number of plant extracts are used against diseases in various systems of medicine such as Ayurveda, Unani and Siddha. Chemicals Only a few of them have been scientifically explored. Plant Reduced glutathione, Cyclophosphamide, 5,5′-dithiobis (2- derived natural products such as flavonoids, terpenes and nitrobenzoic acid) (DTNB), Sodium citrate and other chemi- alkaloids [21–23] and soon has received considerable cals were procured from Sigma Chemical Co (St Louis, MO). Pandey Applied Cancer Research (2017) 37:33 Page 3 of 14 Identification and collection of plant material 2 g/l of HEPES and sodium bicarbonate, and supplemented Aerial parts of B. variegata (Kachnar) like leaves, stem bark with dextrose, penicillin, streptomycin and 10% of fetal and floral bud were collected in the early stages of vegeta- bovine serum. The cells were maintained in a humidified tion from the Bhopal, and Tah-Niwas, District Mandla
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