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Orthopedic & Muscular System: Current Research
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Antinociceptive, Sedative and Muscle Relaxants Activity of Caralluma tuberculata N E Brown

Abdur Rauf1*, Naveed Muhammad2, Barkatullah3, Haroon Khan4, Hira Fatima Abbas5, Ajmal Khan5, Mohammad Arfan1 and Ghias Uddin1

1Institute of Chemical Sciences, University of Peshawar, Peshawar, KPK, Pakistan

2Department of Pharmacy, Abdul Wali Khan University Mardan, KPK, Paksitan

3Department of Botany, University of Peshawar, Peshawar, Pakistan

4Gandhara College of Pharmacy, Gandhara University, Peshawar, Pakistan

5H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan

*Corresponding Author:
Abdur Rauf
Institute of Chemical Sciences
University of Peshawar
Peshawar, KPK, 25120, Pakistan
Tel: +923469488944, +923139488944
E-mail: [email protected]om

Received Date: August 27, 2013; Accepted Date: October 10, 2013; Published Date: October 17, 2013

Citation: Rauf A, Muhammad N, Barkatullah, Khan H, Abbas HF et al (2013) Antinociceptive, Sedative and Muscle Relaxants Activity of Caralluma tuberculata N E Brown. Orthop Muscul Syst 2: 131. doi: 10.4172/2161-0533.1000131

Copyright: © 2013 Rauf A. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Abstract

The current study was designed to assess the preliminary antinociceptive, sedative and muscle relaxants activates
of crude extract and various solvent fractions of Caralluma tuberculata using established in-vivo protocols. The results
illustrated significant (P<0.05) antinociceptive activity of extract/fractions of the plant in a dose dependent manner (50
and 100 mg/kg i.p.). When studied in open field test, the extracts and fractions of the plant demonstrated significant
(P<0.05) sedative effect. Similarly, the extracts and fractions had (P<0.05) muscle relaxant effect on traction test.
However, hexane was the only fraction which did not exhibit significant activity in either of the tests. The current
investigation, suggest that Caralluma tuberculata contain potential molecules with antinociceptive, seadtive and
muscle relaxant activities.

Keywords

Antinociceptive; Sedative and muscle relaxants activity

Introduction

Caralluma tuberculata belong to family Ascalpadaceae. It has an endangered plant used to cure diabetes and to control fat accumulation. C. tuberculata is herb growing in dry hilly area of K.P.K Dir, Pakistan. It is also known as Pamanky in Pashto and cooked and eaten as a vegetable [1]. C. attenuata is also used as a folk medicine for the treatment of diabetes and rheumatism. The literature revealed that C. tuberculata contains luteolin-4'-O-neohesperidoside with a significant anti-inflammatory and antinociceptive activity [2,3]. Some of biological activity of the plant such as phytochemical composition, phytotoxic potential, and antioxidant capacity has already been reported [4,5].

The purpose of the current study was to evaluate the antinociceptive, sedative and muscle relaxant activity of crude extracts and various fractions of C. tuberculata in various animal models.

Materials and Methods

Plant Material: C. tuberculata was collected from the mountain area of Mago, Razagram, Toormang, Dir, Khyber Pakhtunkhwa Pakistan in the month of November 2011. The plant was identified by Ghulam Jelani Department of Botany University of Peshawar Pakistan.

Extraction and fractionation: Shade dried plant of C. tuberculata was filled in the flask and extracted successively with methanol solvent in soxhlet extractor for 4 h. The solvent extract was concentrated under reduced pressure at 45°C using a rotary evaporator, and black crude extract obtained was suspended in water and successively partitioned with n-hexane, chloroform and ethyl acetate fractions.

Acetic acid induced writhing test

The analgesic activity was carried out using NMRI mice (18- 22 g) of either sex. Animal were divided into five groups (n=6). The group I and II were injected with normal saline (10 ml/kg, i.p.) and Ibuprofen (150 mg/kg, i.p.), while the remaining groups were treated with the extract/fractions of the plant (50 and 100 mg/kg, i.p.) after the above treatment animals were injected i.p. with acetic acid (1%). The abdominal constriction (writhing) was counted for 10 min after 5 min of acetic acid injection [6].

The apparatus used in the activity was consist of an area of white wood (150-cm diameter) enclosed by stainless steel walls and divided into four squares by black lines. The open field was placed in a light and sound-attenuated room. Animals were acclimatized under red light (40 Watt red bulb) 60 min before the start of the experiment in laboratory with food and water available ad libitum. Animals were administered with normal saline and the extract/fractions of the plant (50 and 100 mg/kg, i.p.). After 30 min each mouse was placed in the center of the box and the numbers of lines crossed were counted [7].

Traction test

In this procedure, a metal wire coated with rubber was used, both ends of which were rigidly supported with stands about 60 cm above the laboratory bench. Different groups (n=6) were treated with diazepam (1 mg/kg), distilled water (10 ml/kg) and the extract/fractions of the plant (50 and 100 mg/kg, i.p.). The animals were exposed to the traction test after 30, 60 and 90 min of treatment. Each animal was hung by their hind legs from the wire and the time of hanging was recorded for 5s. Failure to hang for less than 5s was considered as the presence of muscle relaxant activity and vice versa [7].

Statistical analysis

Results are expressed as mean ± S.E.M. One-way ANOVA was used for comparison test of significant differences among groups followed by Dunnet’s multiple comparison post test. A level of significance (P<0.05 or 0.01) was considered for each test.

Results and Discussion

Effect of extract/fractions in antinociceptive activity

The results of antinociceptive activity of extract/fractions of the plant are shown in Figure 1. Pain reduction was observed in a dose dependent manner. Crude extract antagonized noxious stimuli of acetic acid to 80% at 100 mg/kg i.p (Figure 1A). Upon fractionation, hexane was found insignificant in pain reversal (Figure 1B). However, chloroform and ethyl acetate fractions demonstrated marked activity 60.10 and 64.75% at 100 mg/kg i.p. (Figure 1C and 1D).

orthopedic-muscular-system-antinociceptive-crude-chloroform

Figure 1: Percent antinociceptive effect of extract/fractions (A) crude extract, (B) hexane, (C) chloroform and (D) ethyl acetate fraction of Caralluma tuberculata in acetic acid induced writhing test. Data presented as mean ± S.E.M, (n=6) compared with control. Ibuprofen (150 mg/kg, i.p.) produced 81% activity.

Effect of extract/fractions in sedative activity

As shown in Table 1, the extract/fractions of the plant showed significant sedative activity in open field test. Apart from hexane, extract and fractions illustrated significant (P<0.05) sedative activity in open field test.

Sample Dose No. of lines crossed
Control 10 ml/kg 130 ±  3.95
n- Hexane  50 mg/kg 126 ± 4.55
100 mg/kg 131 ± 4.25
CHCl3 50 mg/kg 119 ± 3.90
100 mg/kg 112 ± 3.65*
ETOAC 50 mg/kg 100 ± 3.85*
100 mg/kg 95 ± 4.10*
MeOH 50 mg/kg 105 ± 4.55
100 mg/kg 99.0 ± 2.98*
Bromazepam 5 mg/kg 9 ± 0.55***

Table 1: Effect of crude extract and fractions of Caralluma tuberculata in locomotive test (sedative activity)

Effect of extract/fractions in traction test

The effect of extract/fractions of the plant in traction is displayed in Table 2. The crude extract and fractions of the plant provoked significant (P<0.05) activity in traction test (muscle relaxant).

Group  Dose Traction test (%)
    30 min 60 min 90 min
Control 10 ml/kg 0  ±  0.00 0  ±  0.00 0  ±  0.00
Diazepam 0.25 mg/kg 100**  ±  0.00 100**  ±   0.00 100**  ±   0.00
n- Hexane  50 3  ±  0.23 5  ±  0.59 12  ±  0.95
100 4  ±  0.45 9  ±  0.90 16  ±  0.95
CHCl3 50 5  ±  0.06 8  ±  0.07 17.10
100 11  ±  0.95 20  ±  1.19 27.45  ±  1.10
ETOAC 50 0  ±  0.00 10  ±  0.75 15 ± 1.25
100 12  ±  0.89 23  ±  1.05 32.30  ±  2.15*
MeOH 50 5  ±  0.3 11  ±  0.58 15  ±  1.75
100 13  ±  0.90 21  ±  1.54 29.22  ±  1.45*

Table 2: Percent effect of extract/fractions of Caralluma tuberculata in traction test.

Acetic acid induced writhing test has been primarily used by various research groups for the assessment of antinociceptive of natural compounds worldwide [8,9]. Acetic acid caused the release of different endogenous noxious mediators such as bradykinin, serotonin, histamine, substance P [10-12]. The resulting pain is symbolized by contraction of the abdominal muscle accompanied by an extension of the forelimbs and body elongation. The peripheral nociceptive fibers are sensitive to both narcotics analgesic and non-steroid anti-inflammatory drugs [13]. The extract/fractions of the plant (50 and 100 mg/kg, i.p.) showed marked reduction in the abdominal constriction provoked by the acetic acid in a dose dependent manner. Consequently, one possible mechanism of antinociceptive activity of the extract/fractions of the plant could be due to the blockade of the effect or the release of endogenous substances (arachidonic acid metabolites) that excite pain nerve endings.

The open field assay is frequently employed as a prognostic test for the assessment of the sedative properties of natural agents [7]. Pretreatment of mice with extract/fractions of the plant showed dose dependent reduction in locomotive activity in open field test as compared to control. The reduction in the frequency and amplitude of motion could be attributed to the sedative effect of C. tuberculata. Bromazepam was more prominent in its effect [14]. The resulting sedative effects of extract/fractions of the plant were similar to standard drug, bromazepam.

The muscle relaxant activity of extract/fractions of the plant was assessed in traction test which is generally used for the said purpose [7]. The results showed significant muscle relaxant activity of the extract/ fractions of the plant after 90 min of treatment.

Conclusion

It is concluded that the extract/fractions of C. tuberculata possessed strong antinociceptive, sedative and muscle relaxant components. Further studies on the isolation could be helpful in the identification of individual constituent responsible for current show.

Acknowledgement

The authors are grateful for the financial supported by Higher Education Commission of Pakistan and Institute of Chemical Sciences, University of Peshawar, Peshawar, Pakistan.

References

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