Title Page………………..i




Table of content………v



1.1 Background of the study

1.2 Statement of Research Problems

1.3     Justification of The Study

1.4    Objectives of the Study



2.1      Plant of Study

2.1.1 Taxonomic Classification

2.1.2 Names of Pentaclethra macrophylla BENTH.

2.1.3    Botany

2.1.4    Uses of Pentaclethra macrophylla                    

2.2     Biological studies on the activities of Pentaclethra macrophylla   

2.3     Inflammation

2.3.1         Leukocyte Extravasation

2.3.2   Acute inflammation

2.3.3    Causes of Acute Inflammation

2.3.4    Classical Signs Of Acute Inflammation

2.3.5     Chronic  Inflammation

2.3.6   Management of Inflammation

2.4    Chemo-profiles of  some anti-inflammatory medicinal herbs

2.5    Pains (Nociception)

2.5.1    Definition

2.5.2    Types of Pain

2.5.3    Management of Pain

2.5.4    Mode of Administration

2.6    Analgesics

2.6.1    Classes of Analgesics

2.7    Cyclooxygenase

2.7.1    Functions of Cyclooxygenase

2.7.2    How NSAIDs Work

2.7.3    Action of NSAIDs on Cyclooxygenase

2.8    Antipyretic  effect

2.8.1    Pathogenesis of fever

2.8.2    Mechanism of  fever

2.8.3    How The Body Losses Heat

2.8.4    Control Of Body Temperature

2.9    Microbial Effects

Chapter Three

Materials and Methods

1.1    Collection of plant material

1.2    Extraction

1.3    Phytochemical analysis

3.3.1 Test for alkaloids

3.3.2 Test for saponins

3.3.3     Test for Tannins

3.3.4     Teat for Phlobatannins

3.3.5     Test for flavonoids

3.3.6     Test for Cyanogenic glycoside

3.3.7     Test for Anthroquinones

3.3.8  Test for polyphenols

3.3.9     Test for Resin

3.3.10    Test for Balsams

3.3.11     Test for Cardiac Glycosides

3.3.12     Screening for Cardenolides

1.3.13    Screening For Steroidal Glycoside

1.3.14     Test For Carbohydrates


3. 4. 1     Column Chromatography

3. 4. 2         Thin Layer Chromatography (TLC)

3. 5.     Acute Toxicity Studies

3.6.     Anti-Microbial Studies

3.6.1    Culturing Media

3.6.2    Standardization of Micro-organism

3.6.3    Plate Preparation, Inoculation and Incubation

3.7    Anti-inflammatory activity of the methanol extract of Pentaclethra macrophylla on

    egg – albumin induction in mice activity

3.8    Evaluation of the anti-nociceptive potential of the methanol


3.8.1     Acetic Acid-Induced Abdominal Constriction Assay

3.8.2     Formalin-Induced Hind Paw Licking In Mice

3.9     Evaluation Of Anti-Pyretic Activity Of The Extract

3.10     Statistical Analysis



4.1     The weight of the Pulverized plant material and


4.1.1     Result of Acute Toxicity Study

4.1.2     Result Of Antinociceptive effect of The Methanol Bark Extract Of Penthaclethra

    macrophylla in Mice


    EXTRACT OF Pentaclethra macrophylla IN MICE

4.1.4. Result Of Anti-Inflammatory Effect of The Methanolic Bark Extract of Pentaclethra

    macrophylla In Mice

4.1.5 Results of Antimicrobial Evaluation of The Stem Bark Extracts of Pentaclethra


4.1.6     Phytochemical Analysis

4.1.7         IR analysis

4.1.8     gc/ms Analysis

4.2         Discussion

4.2.1        Phytochemical Analysis

4.2.2     Chromatographic Analysis

4.2.3     Acute Toxicity Studies

4.2.4     Anti-Inflammatory Activity – Egg Albumin-Induced Oedema

4.2.5     Anti-pyretic effect--- DNP- induced pyrexia in mice

4.2.6     Antinociceptive Activity

4.2.7    Anti-Microbial Analysis











1.1 Background of the study

Plants have long been used as medicinal agents before the isolation of morphine from opium in the early 19th century (WHO/AFRO,1976). Subsequently other drugs such as cocaine, codeine, digoxin and guanine of which many are still in current use were isolated (Newman et al., 2000; Butler, 2004).

These discoveries in the different use of plants have provided the basis for the modern day medicine and have been termed medicinal plants. Medicinal plants have been described by the World Health Organization (WHO) as plants in which some or all of its parts can be used directly or indirectly in the management of disease (Acharya and Shrivastava, 2008).

The therapeutic properties of medicinal plants are characterized by the presence in their organs of secondary metabolites such as alkaloids, tannins, flavonoids, glycosides, vitamins and coumarin compounds which physiologically affect the bodies of humans and animals or which are biologically active in relation to the causative agents of various diseases. The plant part like fruit, leaves, stem, bark and roots or even the whole plants are themselves used in the treatment of illnesses, the plant may also form biological template for its eventual development of which is referred to as orthodox medicines. Isolation and characterization of pharmacological active constituents from medicinal plants are among the leading research trends of today. (Acharya and Shrivastava, 2008).

Drug discovery from plant origin entails the in-cooperation of so many approaches which is likely to combine botanical, phytochemical and biological techniques. Medicinal Plant constituents combine to provide us with new chemical entities (lead molecules) for the development of drugs against various pharmacological targets (Acharya and Shrivastava, 2008).

Pentaclethra macrophylla Benth. (African oil bean) is a tropical tree crop found mostly in the southern rain forest zone of West Africa. It belongs to the Fabaceae family and sub-family Mimosoidae (Keay et al., 1989). The plant is cultivated by farmers in southern and middle belt regions of Nigeria for its soil improvement properties and as a component of an agro-forestry system (Okafor, 1990). The seeds are dorso-ventrally flattened, hard brown in colour and about 6cm long and 3cm wide (Achinewhu,1986).

Pentaclethra macrophylla is normally called African Oil bean (Oliver, 1960).It Contains 8-10% carbohydrate and 47-48% of fatty acid (Odoemelain, 2005).

Ethno-pharmacological literature has shown Pentaclethra macrophylla to have medicinal uses and has been used for various parasitic infections, inflammations, and related illnesses (Cousins and Huffman, 2002). The plant has also been confirmed as a medicinal plant used in traditional herbal practice for the treatment of disorder of both domestic and wild animals and human diseases (Akah et al., 1999). The bark fruits, seeds and the leaves are used as antihelminitics for gonorrhea, convulsion and as analgesic (Githens, 1948; Bouquet and Debray, 1974; Iwu, 1993).

Despite these various uses of the plant, there has been insufficient information on its exact antimicrobial properties.

1.2 Statement of Research Problems

The search for the healing properties of plant is an ancient idea that has remained even till date. In recent years, drug resistance to human pathogenic bacteria has been commonly reported all over the world and accounts for approximately one half of all deaths in tropical countries (Alavijeh et al., 2012).

This research therefore, intends to determine the phytochemistry, antimicrobial, anti-inflammatory, anti-pyretic and analgesic properties of the stem bark extracts of Pentaclethra macrophylla Benth. The results of this study may lead to the discovery of drug that could reduce or eliminate drug resistance to human pathogenic bacteria.

1.5     Justification of The Study

Pentaclethra macrophylla Benth (Fabaceae) is used in Nigeria widely and generally in Africa. Some ethno-pharmacological values of Pentaclethra macrophylla have been evaluated to include the bark infusion as an abortifacient, the ability of the leaf or bark to treat diarrhea and toothache, also the crushed seed for abortion, smoked or burnt leaves as an anti-convulsant and the fermented seed cooked and served as food in Africa especially Nigeria. (Oboh, 2007).

In Nigeria, the stem bark of Pentaclethra macrophylla is used to traditionally treat skin infections, headache, pains, fever, boils and swellings. Natural products particularly plants remain an important source of new drugs, new drug leads and new chemical entities allowing the design and rational planning of new drug biomimetic, synthetic development and the discovery of new therapeutic properties not yet attributed to known compounds. (Hamburger and Hostettman, 1991; Newman et al., 2000, 2003 and Butler, 2004). Thus, this work seeks to validate the ethno-medicinal use of the plant.

1.4  Objectives of the Study

1.    To extract the dried pulverized bark of Pentaclethra macrophylla with n-Hexane, dichloromethane, ethylacetate and 70% methanol via cold maceration.

2.    To evaluate the presence of phytochemicals such as Alkaloids, Saponins, Flavonoid, Terpenes, Cyanogenic glycoside, Cardiac glycoside, Carbohydrate, Polyphenols, Steroidal glycosides, Phlobatanins, Anthraquinones, Balsam and Tannins using standard procedures.

3.    To screen for Antimicrobial activity using agar well diffusion method against Staphylococcus aureus, Candida albicans, Streptococcus gordonii, Escherichia Coli, Salmonella typhi and Bacillus subtilis.

4.    To evaluate the anti-pyretic, anti-inflammatory and antinociceptive effects in mice after establishing the toxicity profile using Lorke’s Method.

5.    To isolate compounds using chromatographic techniques such as: Column chromatography and preparative thin layer chromatography

To elucidate the structures of the compounds isolated.               



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