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Home > Appraisal of Ajuga Bracteosa Wall. Ex Benth. As a Promising Natural Source of Bioactive Leads

Appraisal of Ajuga Bracteosa Wall. Ex Benth. As a Promising Natural Source of Bioactive Leads

Thesis Info

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Author

Zahra, Syeda Saniya

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Pharmacognosy

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10590/1/Syeda_Saniya_Zahra_Pharmacognosy_2019_QAU_18.07.2019.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725525731

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The traditional plants occupy fundamental place for the fulfillment of healthcare needs in developing countries. The current study was aimed to purify and characterize bioactive leads from a medicinal folklore, Ajuga bracteosa Wall. ex Benth. Initially, total fifteen extracts were prepared from dried powdered plant material in different solvent systems using ultra sonication aided maceration. These extracts were evaluated to reconnoiter phytochemical and biological (i.e., antioxidant, antimicrobial, cytotoxic and enzyme inhibitory) attributes. Existence of huge amounts of polyphenols was confirmed in methanol extract (via RP-HPLC analysis) along with highly promising antioxidant and protein kinase inhibitory activities and moderate α-amylase inhibitory, antileishmanial and cytotoxic potential. Therefore, methanol was selected as the most suitable solvent for bulk extraction. Afterwards, the preparative extract (ABCM) was partitioned through solvent-solvent extraction and the resultant main fractions (i.e., ABH, ABE and ABW) were processed through various chromatographic procedures by simultaneously gauging their activities against antioxidant, enzyme inhibitory and cytotoxic assays. AB1 was isolated from its ABH fraction with prominent α-amylase inhibitory activity (IC50 119.4±0.22 µg/ml). AB2, AB3, AB4 and AB5 were isolated from ABE fraction. AB2 gave moderate protein kinase inhibitory potential (i.e., 7.67±0.58 mm bald zone of inhibition). AB3 and AB4 manifested good cytotoxic potential (with LC50 111.52±0.24 and 78.56±0.53 µg/ml respectively) while AB4 also showed good free radical scavenging (with IC50 10.4±0.32 µg/ml) and α-amylase inhibitory potential (with IC50 134±0.56 µg/ml). Magnificent total antioxidant and reducing activities (i.e., 182.8±0.72 and 760.12±0.64 µg AAE/mg compound respectively) were shown by AB5. The ABW fraction resulted in AB6 with moderate cytotoxic potential (with LC50 183.42±0.57 µg/ml). X-ray crystallographic and spectroscopic studies characterized AB1, AB2, AB3, AB4, AB5 and AB6 as 2, 3dihydroxy propyl palmitate, ajugarin I, apigenin, luteolin, ajugarin VI and 8-Oacetylharpagide respectively. In vivo activities including antiinflammatory, analgesic, antidepressant and anticoagulant were designed for further confirmation of the above said activities at compound level. The results revealed high dose (HD, 20 mg/kg) of AB2, AB3 and AB6 to be potent antiinflammatory agents with values ranging between 70-90% edema inhibitions. AB1, AB2 and AB6 showed excellent analgesic behavior with > 90% increment in pain threshold whereas HD and LD (low dose, 10 mg/kg) of AB2 showed maximum antidepressant activity in the range of 90-100 seconds. The remarkable anticoagulant profile (with 143±4.77 seconds for blood coagulation) was shown by HD of AB6. On the basis of previous hepatoprotective reports from the subject plant, the most abundant compound, AB2 was selected for confirmation of hepatoprotective and renoprotective aspects using in vivo CCl4 toxicity model. Endogenous antioxidants i.e. superoxide dismutase, catalase, peroxidase, glutathioneS-transferase and reduced glutathione were revitalized with HD (4 mg/kg) of AB2 exhibiting the activity levels of 4.54±0.39, 4.22±0.41 and 9.02±0.79 U/min, 18.97±1.79 nM/min/mg protein and 20.3±1.7 nM/mg protein respectively. Reduced serum levels of hepatic as well as renal markers i.e. alanine transaminase, aspartate transaminase, alkaline phosphatase (with 43.7±0.21, 37.2±0.13 and 201.3±0.029 U/l respectively), urea and creatinine (with 24.07±0.19 and 0.98±0.11 mg/dl respectively) were observed with HD of AB2. The lipid profile also showed ameliorative effects for serum triglycerides and cholesterol (i.e., 104±0.34 and 147.2±0.03 mg/dl respectively) at HD. Abnormalities in histoarchitecture of both the organs were curbed by HD of the compound indicating its regenerative properties. In principle, the aforementioned findings endorses A. bracteosa as a substantial source of bioactive leads with marvelous pharmacological spectrum.
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حفیظ صدیقی

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Shah Abdul Latif University, Khairpur Department of Business Administration

Purpose: This study provides a theoretical framework that explores the personality traits that influence new product adoption in rural environment. Five personality traits form part of the framework, namely; consumer innovativeness, dogmatism, social character (inner and other directed), and need for uniqueness. This study will pave a way in understanding the potential behavior of consumers toward adoption of a newly introduced product in a given environment. Following the conceptualization of NPA, a conceptual model was proposed which represents five hypotheses: two hypotheses were supported and three hypotheses were not supported. Methodology: The data was collected from selected (rural) areas of upper Sindh province of Pakistan using convenient sampling procedure; there were 430 respondents in the sample. Five-point Likert scale was adapted for the study, and a pilot test was used to confirm the validity of the scales and the correctness of the datagathering procedure. Following the data gathering and coding, validity and reliability tests were carried out on the entire sample. Keeping in view various constructs of conceptual model, the proposed hypotheses were analyzed using the Structural Equation Modeling (AMOS v.20) to test the impact of the constructs on NPA. Findings and contribution of research: The evidence related to the model suggests that consumer innovativeness and need for uniqueness are the dominant factors (traits) in adopting a new product whereas social character (ID /OD), and dogmatism have no significant impact on new product adoption behavior, it suggests that consumer innovativeness and need for uniqueness traits of consumer personality are dominant factors in adopting a new fashion and clothing product in rural market. Research Limitations: First; the results of this study may not be appropriate for generalizing across the majority of Pakistani consumers, and in a global context. Second; the study is focusing only on fashion and clothing product category; third, only selected personality traits are examined in the study. 2 Implications: By examining the potential behavior of rural consumers, the study facilitates the possibility of consumer behavior research that, in new product adoption decision consumer personality (traits) should have a significant contribution, thus providing a better understanding of influence of their personality traits on new product adoption. KEYWORDS: New product adoption, consumer innovativeness, dogmatism, social character, need for uniqueness, personality, fashion and clothing, and rural consumers.