ArticlePDF Available

Abstract

This study was conducted to evaluate the effects of topical application of Plantago lanceolata L. (PL; Plantaginaceae) extract on the rate of wound healing closure and histology of healed wound. An area of uniform wound 7 mm in diameter using circular punch was excised from the nape of the dorsal neck of all rats. The animal groups were topically treated with 0.75 and 1.5% of PL and two groups were treated as control and placebo groups. Macroscopically, wound dressed with PL extract significantly healed earlier than those treated with placebo and control groups. Histological analysis of healed wounds dressed with PL extract showed comparatively less scar width at wound site and healed wound contained less inflammatory cells and more collagen with angiogenesis compared to wounds dressed with placebo. Results of wound enclosure assessment showed that PL was significantly effective in wound enclosure. The best results (100.0% healing) were seen in third group (0.75% of PL extract) on 14 th day. In conclusion, wounds dressed with PL extract significantly enhanced the acceleration of wound healing enclosure in rats.
Journal of Medicinal Plants Research Vol. 6(34), pp. 4844-4847, 5 September, 2012
Available online at http://www.academicjournals.org/JMPR
DOI: 10.5897/JMPR11.516
ISSN 1996-0875 ©2012 Academic Journals
Full Length Research Paper
Histological evaluation of Plantago lanceolata L. extract
in accelerating wound healing
Hojjat Ismayilnajadteymurabadi1, Mohammad Reza Farahpour2* and Amir Amniattalab3
1Graduated Veterinary Medicine, Islamic Azad University, Department of Veterinary Medicine, Urmia Branch, Iran.
2Department of Clinical Sciences, Islamic Azad University, Urmia Branch, Urmia, Iran.
3Department of Basic Sciences, Pathology, Islamic Azad University, Urmia Branch, Urmia, Iran.
Accepted 4 January, 2012
This study was conducted to evaluate the effects of topical application of Plantago lanceolata L. (PL;
Plantaginaceae) extract on the rate of wound healing closure and histology of healed wound. An area of
uniform wound 7 mm in diameter using circular punch was excised from the nape of the dorsal neck of
all rats. The animal groups were topically treated with 0.75 and 1.5% of PL and two groups were treated
as control and placebo groups. Macroscopically, wound dressed with PL extract significantly healed
earlier than those treated with placebo and control groups. Histological analysis of healed wounds
dressed with PL extract showed comparatively less scar width at wound site and healed wound
contained less inflammatory cells and more collagen with angiogenesis compared to wounds dressed
with placebo. Results of wound enclosure assessment showed that PL was significantly effective in
wound enclosure. The best results (100.0% healing) were seen in third group (0.75% of PL extract) on
14th day. In conclusion, wounds dressed with PL extract significantly enhanced the acceleration of
wound healing enclosure in rats.
Key words: Plantago lanceolata, wound healing, rat, histological study.
INTRODUCTION
Normal wound healing response begins the moment the
tissue is injured. Wound healing is the process of repair
that follows injury to the skin and other soft tissues.
Following injury, an inflammatory response occurs and
the cells below the dermis begin to increase collagen
production. Later, the epithelial tissue is regenerated
(Souba and Wilmore, 1999). The objectives of the
pharmacology of wound healing are to study the
influence of various measures in wound management
programmers on healing and to screen drugs that
promote healing. Several materials have so far been
used and are reported to affect healing differently.
However, intensive research in wound healing has not
yielded, economic and efficacious pro-healing agent that
*Corresponding author. Email: m.farahpour@iaurmia.ac.ir. Tel:
+98(441) 4373676. Fax: +98(441) 3460980.
could obviate the long hospitalization of patients following
surgery and wound infliction (Shivananda et al., 2006).
Plantago lanceolata L. (PL; Plantaginaceae), is a
perennial plant species with a worldwide distribution and
large ecological amplitude. Iridoid Glycosides (IGs) are a
group of monoterpene-derived compounds that have
been recorded in over 50 plant families (Bowers, 1991).
The main IGs found in P. lanceolata are catalpol and its
precursor aucubin (Jensen, 1991).
Several therapeutic effects including: Therapeutic
effects on gastrointestinal, blood and respiratory (asthma
and dyspnea) disorders have been described for the
Plantago lanceolata in Iranian ancient medical books
(Zargary, 1990). PL is used internally to suppress coughs
associated bronchitis and upper respiratory inflammation,
to reduce skin inflammation, treatment of wounds and as
a laxative (Baytop, 1999).
In this study, we investigated wound healing activity of
PL under pathological review which was based on anti-
inflammatory characteristic of PL.
MATERIALS AND METHODS
Plant material preparation of the extract
Dried PL flowers were collected and Cold aqueous extract was
prepared. Dried flowers were steeped for 6 h at 4°C in 300 ml
distilled water, with constant stirring. The material was centrifuged
and the supernatant was filter-sterilized and then freeze-dried.
Acute toxicity studies
The acute toxic study was used to determine a safe dose for PL.
Thirty healthy Wistar rats (15 males and 15 females) were obtained
from the Experimental Animal House, Faculty of veterinary,
University of Urmia, and were divided equally into 3 groups labeled
as placebo, 5 and 10% of PL. respectively. The animals were
observed for 30 min and 2, 4, 24 and 48 h after the administration
for the onset of clinical or toxicological symptoms.
Mortality, if any, was observed over a period of two weeks. The
animals were sacrificed on the 15th day. Hematological, serum
biochemical and histological (liver and kidney) parameters were
determined following standard methods (Bergmeyer, 1980; Tietz et
al., 1983). Throughout the experiments, all animals received human
care according to the criteria outlined in the ―Guide for the Care and
Use of laboratory Animals.
Experimental animals
32 Male Wister rats (190 to 210 g) of 10 weeks were obtained from
the Experimental Animal House, Faculty of Veterinary University of
Urmia and the rats were divided randomly into 4 groups of 8 rats
each. The animals were housed separately (one rat per cage). The
animals were maintained on standard pellet diet and tap water.
Animal houses were in standard environmental conditions of
temperature (22 ± 3°C), humidity (60 ± 5%), and a 12 h light/dark
cycle.
Experimental induced excision wounds
After anesthesia induction with Xylizaine 2% and ketamine 10%
(I.M. 60 mg/kg), rats were fixed in ventral posture on surgery table.
Then the dorsal area from scapula to ilium were scrubbed and
prepared to surgery. Two circle-shapes, full thickness surgical
wounds with 7 mm diameters in both side of the backbone, 1 cm
away from backbone and 5 cm away from each other were made
with biopsy punch. With this excisional wounding method,
epidermis, dermis, hypodermis and Panniculus Carnosus layers
were removed completely (Luisa and DiPietro, 2003). Wound
contraction was monitored by measuring wound area, on alternate
days till the wounds were completely healed. Wound contraction
was calculated as percentage reduction in wound area.
Topical wound application
After being made of surgical wound, all rats randomly was colored
with none toxic color and divided to three groups. In group A, 0.75%
PL extract was administered. Group B received 1.5% PL. group D
as placebo were administrated with Eucerin and Vaseline and
group C as control group did not received any administration. All
extracts were applied in topical route. All rats were followed 21 days
Ismayilnajadteymurabadi et al. 4845
later. Daily observation was performed and any wound fluid or any
evidence of infection or other abnormalities were noted.
Histopathological evaluation of healed wounds
The skin samples were obtained during days 3, 7, 14 and 21, from
all groups of animals and were processed for histological study.
The samples fixed in formalin and installed on slides, stained with
Hematoxylin and Eosin and were reviewed under light microscope.
Recorded factors were scar, inflammatory cells, kind of
inflammatory cells, angiogenesis, fibroplasia, epithelial growth,
hyperemia, collagen density and Fibroblastic aggregation.
Statistical analysis
All values are reported as mean ± S.D, the statistical differences
among groups were assessed using Duncan multiple range test
and analysis of variance (ANOVA). A value of p<0.05 was
considered significant. Statistical analysis was performed using
SAS 9.1 for Windows.
RESULTS
Acute toxicity
Acute toxicity of P. lanceolata was carried out on animal
at dose of 5 and 10% and animals were kept under
observation for 14 days. All animals remained alive and
did not show any significant differences between control
and treated groups. We concluded that P. lanceolata
orally administrated to rats was safe and no side effect
was seen even at highest doses.
Wound healing activity
Groups: A: 75%, B: 1.5%, C: Control, D: Placebo
On 3rd day angiogenesis in A group was more than B
group. But it was same between B and C groups. On 7th
day, both hyperemia and bleeding were same in all
groups. Leukocytes in A group were less than B group
but it was significantly high in C group compare to A and
B. There was no remarkable difference in angiogenesis
between groups. Collagenation was not noticeable. The
main difference between A group and other groups on 7th
day was epithelization which was macroscopically higher
than other groups. Scar formation in treated group was
also better than C or D.
During 14th day, hyperemia was equal both in A and C
but it was high in B. There was no bleeding in A but both
B and C showed a bit of bleeding. There was no sign of
inflammatory in A and B but leukocytes were seen in C
group. Angiogenesis was still observable in A and B.
Epithelization was remarkably up in A and B.
On 21st day there was no sign of hyperemia in C but it
was seen in A and B. There was no inflammatory cell in A
and B but in C group lymphocytes were still in the site
4846 J. Med. Plants Res.
Table 1. Effect of B. Plantago lanceolata extract on percentage (%) wound healing in experimental rats.
No.
Group
3 days
7 days
14 days
21 days
1
Control
26.04±0.49
45.25c±1.35
71.54d±0.74
95.13b±1.38
2
Placebo
26.14±1.42
46.42c±0.22
75.35c±0.81
100a±0.0
3
0.75%
26.30±0.37
71.47b±1.17
100a±0.00
100a±0.0
4
1.5%
26.44 ±1.66
75.29a±1.20
85b±0.73
100a±0.0
Significance
NS
*
**
**
* All expressed as mean and standard deviation (S.D). Mean in columns with different letters were significantly different
(NS Not Significant *p<0.05, **p<0.01).
and there was no difference between groups according to
epithelization and scar formation.
Wound enclosure
Percentages of wound healing have been documented in
Table 1. 3 days after drug application no statistical
significant differences were seen between groups (NS),
although treated groups showed better wound enclosure
percentage. Topical ointment demonstrated its effective-
ness and treated groups had significant difference
compare to control and placebo groups in 7th day. In
14th day, complete enclosure was seen in A group and B
group showed higher closure compare with placebo and
control groups. Consider the fact that during whole study
placebo showed a slight effect on better healing. As it can
be seen, 21st day of study all groups showed complete
closure except control group which was not completely
closed in healing site.
DISCUSSION
It is important to note that throughout the period of wound
treatment, the PL extract did not cause irritation or pain to
the animals as the rats neither show any signs of
restlessness nor scratching/biting of wound site when the
extract were applied. All the surgical interventions were
carried out under sterile conditions and animals were
closely observed for any infection. This is very important
that the control microbial infection is necessary for better
healing and its management (Muhammad and
Muhammad, 2005).
Wound healing is a complex and dynamic process of
restoring cellular structures and tissue layers in damaged
tissue as closely as possible to its normal state. Wound
contracture is a process that occurs throughout the
healing process, commencing in the fibroblastic stage
whereby the area of the wound undergoes shrinkage.
The proliferative phase is characterized by angiogenesis,
collagen deposition, granulation tissue formation,
epithelialization, and wound contraction resulting in a
smaller amount of apparent scar tissue (Midwood et al.,
2004). In the present study, topical application of PL
extract significantly accelerated the rate of wound
healing, and histology, healed wound contain
comparatively less inflammatory, more collagen and
angiogenesis. Topical application of PL extracts
demonstrated its effectiveness and treated groups
presented significant difference compare to control and
placebo groups in 7th and 14th days however, group A
showed complete wound closure (100%) sooner (14th)
than other groups (groups B, C and D). Wound healing
effects may be due to regulation of collagen expression
(Bonte et al., 1993).
Similarly, enhanced healing activity has been attributed
to collagen formation and angiogenesis (Shukla et al.,
1999; Trabucchi et al., 1986). Collagen played a central
role in the healing of wounds and it is a principal
component of connective tissue and provides a structural
framework for the regenerating tissue (Cohen et al.,
1992); although we did not completely measure collagen
rate in wound site, wound enclosure results show
remarkable collagenation in treated groups (Table 1).
Angiogenesis in granulation tissues improves circulation
to the wound site thus providing oxygen and nutrients
essential for the healing process (Szabo et al., 1995) that
includes re-epithelization (Habibipour et al., 2003) and
showed that histological analysis of the treated healed
wound group contained a large amount of fibroblast
proliferation, collagen synthesis, and neovascularization,
which resulted in an increased wound tensile strength
and accelerated healing of wound. It is proved that PL
has an anti-inflammatory activity (Herold et al., 2003;
Wegener and Kraft, 1999) which might be a reason in
accelerating wound healing.
According to this characteristic of PL, inflammatory
cells rate will decrease in the wound site which lead to
better wound healing. Extract from PL and Plantago
major are antiphlogistic in carrageenan and PGE1-
induced inflammations in rats (Shipochliev, 1981).
Aceteoside, the main phenylethanoid from PL inhibits
arachidonic acid induced mouse ear oedema (Murai et
al., 1995). Therefor PL can inhibit oedema in wound site
as it did in present study some wound healing process
could be accelerated under none-oedema condition in
wound site.
Compounds such as the iridoid glycosides aucubin and
catalpol, the aglycone aucubigenin, and caffeic acid
derivatives including plantamajoside and acteoside have
been isolated from Plantago spp. and have demonstrated
antimicrobial activity (Samuelsen, 2000; Blumenthal et
al., 2000) thus PL can decrease microbe volume in
wound site which is a useful trend to accelerate wound
healing.
In this study, we demonstrated that extract from PL was
beneficial in wound healing base on its anti-microbial and
anti-inflammatory which helped to faster wound
contraction and better histological properties of treated
wounds.
REFERENCES
Baytop T (1999). Therapy with Medicinal Plants in Turkey (Past and
Present), 2, Nobel Tip Kitabevleri, Istanbul.
Bergmeyer HU (1980). IFCC method for the measurement of catalytic
concentrations of enzymes. Part 3. IFCC method for alanine
aminotransferase. Clin. Chim. Acta. 105:147-154.
Blumenthal M, Busse WR, Goldberg A, Gruenwald J, Hall T, Riggins
CW, Rister RS, Klein S, Rister RS (2000). Plantain. Texas: American
Botanical Council; Boston: Integrative Medicine Communications.
Adapted from The Complete German Commission E Monographs
Therapeutic Guide to Herbal Medicines, 1998. Available:
http://www.herbalgram.org/iherb/expandedcommissione/he078.asp.
Accessed 16 July 2006.
Bonte F, Dumas M, Chadgne C, Meybeck A (1993). Influence of Asiatic
acid, madecassic acid, and asiaticoside on human collagen I
synthesis. Planta Med. 60:133-135.
Bowers MD (1991). Iridoid glycosides. in: Rosenthal G A and
Berenbaum MR (eds.). Herbivores: Their Interaction with plant
secondary metabolites, 2nd ed. Academic Press, Orlando; 1991, Pp.
297-325.
Cohen IK, Diegelmann RF, Lmdblad WJ (1992). Wound healing:
Biochemical and clinical aspects. Philadelphia: Saunders. ISBN:
0721625649.
Habibipour S, Oswald TM, Zhang F, Joshi P, Zhou XC, Dorsett-Martin
W, Lineaweaver WC (2003). Effect of sodium diphenylhydantion on
skin wound healing in rats. Plast. Reconstr. Surg. 112:1620-1627.
Herold A, Cremer L, Calugaru A (2003). Hydroalcoholic plant extracts
with anti-inflammatory activity. Roum. Arch. Microbiol. Immunol.
62:117-129.
Jensen SR (1991). Plant iridoids, their biosynthesis and distribution in
angiosperms, in: Harborne JB and Tomas-Barberan FA (eds.).
Ecological Chemistry and Biochemistry of Plant Terpenoids.
Clarendon Press, Oxford Pp. 133-58.
Luisa A, DiPietro L (2003). Burns Wound Healing: Methods and
protocols (Methods Mol. Med.). Humana Press Inc. 1:3-16.
Ismayilnajadteymurabadi et al. 4847
Midwood KS, Williams LV, Schwarzbauer JE (2004). Tissue repair and
the dynamics of the extracellular matrix. Int. J. Biochem. Cell. Biol.
36(6):1031-1037.
Muhammad HS, Muhammad S (2005). The use of Lawsonia inermis
Linn. (henna) in the management of burn wound infections. Afr. J.
Biotechnol. 4:934-937.
Murai M, Tamayama Y, Nishibe S (1995). Phenylethanoids in the herb
of Plantago lanceolata and inhibitory effect of arachidonic acid-
induced mouse ear edema. Planta Med. 61(5):479-480.
Samuelsen AB (2000). The traditional uses, chemical constituents and
biological activities of Plantago major L. A review. J. Ethnopharmacol.
71:121.
Shipochliev T (1981). Uterotonic action of extracts from a group of
medicinal plants. Vet. Mad Nauki. 18(4):94-98.
Shivananda N, Poorna N, Steve S, Vidyasagar B, Andrew A (2006).
Evaluation of wound healing activity of Allamanda cathartica. L. and
Laurus nobilis. L. extracts on rats. BMC Complement. Altern. Med.
6:12.
Shukla A, Rasik AM, Dhawan BN (1999). Asiaticoside-induced elevation
of antioxidant levels in healing wounds. Phytother. Res. 13(1):50-54.
Souba WW, Wilmore D (1999). Diet and nutrition in case of the patient
with surgery, Trauma and sepsis. In: Shils M, Olson J, Shike M, Ross
AC, editor. Modern Nutrition in Health and Disease. 9. Baltimore,
Williams and Wilkins. Pp. 1589-1618.
Szabo S, Kusstatscher S, Sakoulas G, Sandor Z, Vincze A, Jadus M
(1995). Growth factors: New ―endogenous drug‖ for ulcer healing.
Scandinavian. J. Gastroenterol. 210:15-18.
Tietz NW, Rinker AD, Shaw LM (1983). IFCC methods for the
measurement of catalytic concentration of enzymes. Part 5. IFCC
method for alkaline phosphatase. J. Clin. Chem. Clin. Biochem.
21:731-748.
Trabucchi E, Preis-Baruffaldi F, Baratti C, Montorsi W (1986). Topical
treatment of experimental skin lesions in rats: macroscopic,
microscopic and scanning electron-microscopic evaluation of the
healing process. Int. J. Tissue React. 8:533-544.
Wegener T, Kraft K (1999). Plantain (Plantago lanceolata L.): anti-
inflammatory action in upper respiratory tract infections. Wien Med.
Wochenschr. 149:211-216.
Zargary A (1990). Medicinal plants. 5th Edition. Tehran: Tehran
University Press.
... Plantago lanceolata is effective for treating gastric ulcers, drainage of abscesses and respiratory tract infections; it also appears useful for wound healing (Kovac et al. 2015). Owing to its phenylethanoid content, P. lanceolate exhibits an anti-edematous effect (Farahpour et al. 2012). P. lanceolata exhibits anti-bacterial effects on Staphylococcus aureus, Streptococcus β-hemolyticus, Proteus vulgaris, etc. (Mahmood and Phipps 2006). ...
... The effects of Plantago species on wound healing vary with the species, the part of the plant used, the extract and the route of administration (Farahpour et al. 2012, Kovac et al. 2015, Zubair et al. 2016. ...
... Kovac et al. (2015) prepared an extract of dried P. lanceolata leaves using a different extraction method and treated wounds at 1% and 10% PLE and reported that both PLE groups exhibited significantly increased wound tensile strength on day 14. Farahpour et al. (2012) prepared an extract of dried P. lanceolata flowers using a different extraction method and applied 0.75% and 1.5% concentrations directly to the wounds. These investigators reported complete macroscopic healing of the wound at the higher concentration PLE group on day 14. ...
Article
Wound healing requires cells that increase both collagen production as a result of inflammatory events and regeneration of epithelial tissue. The Plantago species of herbs have been used in traditional treatment of skin disorders and infectious diseases, and digestive, respiratory, reproductive and circulatory conditions. We investigated the efficacy of different concentrations of Plantago lanceolata L. extract (PLE) for wound healing owing to its anti-inflammatory, anti-bacterial, anti-fungal, anti-oxidant, anti-ulcerative, analgesic and immunomodulatory properties. We used 72 mice in four groups of 18. An excisional 1 cm wound was created in the skin on the back of the mice in all groups. An ointment containing 10% PLE was applied to the wound in group 1, an ointment containing 20% PLE was applied in group 2 and vaseline was applied in group 3. In group 4, no treatment was applied to the wound. On days 7, 14, and 21 of the experiment, six animals in each group were sacrificed after the wounds were photographed and specimens from the wound sites were examined. On day 14, epithelialization was more prominent in group 2, while vascularization and collagen deposition was more advanced in groups 1 and 2 compared to the other groups. Immunohistochemical examination revealed that TGF-β1 expression was elevated on day 14 in all groups; however, this elevation was more limited in groups 1 and 2 than in groups 3 and 4. Although ANGPT-2 expression increased in groups 1 and 4 on day 14, it decreased significantly in groups 2 and 3. We found that different concentrations of PLE exhibited positive effects on wound healing. Application of 10% PLE ointment may be a useful strategy for wound healing.
... The images were processed by using amorphometric software (Image J®, National Institute of Health, Bethesda, MD, USA to assess the wounded areas during each period for both groups. Then wound closure rates were obtained according percentage of the reduction in original wound area size by using the following formula (17,18). ...
... The results of wound contraction rate in the current study showed at 7th day in both groups were came in line with results of many studies by (18,33) whom mentioned to the events of wound contraction begins approximately 4 to 5 days after initial injury due to first appearance of Myofibroblasts and it is a celldirected process: cell division is required, but collagen synthesis is not. In a nonsutured wound, wound edges move toward one another at a rate of approximately 0.6 to 0.75 mm/d. ...
Article
Full-text available
Objective: The experimental study was performed to assessment the influence of topical application of 10% of plantago lanceolata leaves extract (PLLE) in enhancement of contaminated excisional wound in 20 adult local breed rabbits. Methodology: Twenty adult local breed male rabbits were used in this experimental study. After animals anesthetized then twenty surgical excisional wound in diameter (2cm) were created on thoracic region (1wound\side). Rabbits were divided into control group in which wounds on right side were treated by irrigation with normal saline once \daily. Whereas, in treated group wounds on left side treated by topical application of 10% PLLE ointment (once\day). All wounds were dressing. The healing process was evaluated through macroscopic examination, wound contraction rate (WCR) and histopathological examination. Result: The presence study confirm there were significantly different at (P≤0.05) were registered between control and treated group along the time of study in which PMLE play accelerating role since it used.
... anti-inflammatory, antioxidant, antibacterial, immunostimulant, epithelising and procoagulant effects in vitro (EMA 2011a). The topical application of P. lanceolata extract on wound healing in rats was shown to be beneficial as it reduced the microbial count in the wound site and accelerate closure (Farahpour et al. 2012). ...
Chapter
This chapter presents indications, clinical evidence, pre-clinical evidence, mechanisms of action, interactions, and contraindications of ribwort plantain (Plantago lanceolata L.). The main constituents are iridoid glycosides including aucubin and catalpol, mucilage polysaccharides, flavonoids such as apigenin and luteolin, the phenylethanoids (acteoside, isoacteoside and plantamajoside), the phenol carboxylic acids, chlorogenic acid and vanillic acid, saponins, volatile oils and inorganic constituents. Plantain is used mainly to treat inflammatory upper respiratory tract infections, as a demulcent for the symptomatic relief of irritation and associated dry cough. It has also been used topically for inflammatory skin conditions and allergic rashes. Adverse effects, dosage, and general plant information are included in the chapter. The fresh leaves have been used in Scotland for healing fresh wounds, either as a poultice or as an ointment.
... Traditionally, medicinal plants have been used for many years as topical and internal preparations to promote wound repair. With the development of scientific research methods, the significant successes reported have led to investigation into medicinal plants with a view to confirming these acclaimed properties (Farahpour and Mavaddati, 2012). Then, the formulation which claims to possess wound healing activity shall be studied with the features like tensile strength of newly formed tissue, biochemical parameters like serum and tissue levels of hydroxyproline, lysyl oxidase, methionine, ascorbic acid etc. which contribute to the all-round healing of wound (Ganju and Pathak, 2013). ...
Chapter
Wound healing is a complex process that consists of several phases that range from hemostasis, inflammation, proliferation, and maturation (tissue remodeling). Failure in the wound healing process leads to the progression of nonhealing chronic wounds. The wound healing process is affected by many factors including age and sex hormones, nutrition, oxygenation, stress, diabetes, obesity, infection, medications, alcoholism, and smoking and it leads to the development of chronic wounds. Most of the chronic wounds are ulcers associated with diabetes mellitus, ischemia, and venous stasis disease. Also, resistance to bacterial infection, protein adsorption, and increased levels of exudates are delaying the wound healing process. Hence, the researchers are searching for new molecules for the management of nonhealing chronic wounds. The new drug candidates can be discovered from either natural resources or chemical synthesis. In this chapter, the importance of natural sources for the discovery of drug candidates for the management of wounds is discussed.
Article
The effects of water and chloroform extracts of the leaves of Lawsonia inermis (henna plant) against the primary invaders of burnt wounds was investigated. Clinical isolates of Staphylococcus aureus, Streptococcus sp, Pseudemonas aeruginosa, Candida albicans, Fusarium oxysporum, and Aspergillus niger were treated with extracts of the leaves of L. inermis for antimicrobial activity using in vitro agar incorporation method and well diffusion methods respectively. The henna leaves extracts were able to inhibit the growth pattern of A. niger and F. oxysporum. Streptococcus sp. and S. aureus were also inhibited by the extracts. Inhibition of the microorganisms' growth suggests that henna may be valuable in the management of burnt wound infections.
Article
The effects of the topical antiseptic agents mercurochrome and silver nitrate and of sodium hyaluronate on the process of wound healing were assessed by macroscopic examination, light microscopy histology, electron microscopy and scanning electron microscopy of wounds made by cutting or by abrasion of the skin of rats. It was found that wounds treated with hyaluronic acid underwent longer periods of inflammation (proportional to the presence of mastocytes) and greater amounts of collagen deposition than wounds that were either untreated controls or treated with silver nitrate or mercurochrome, but this did not impede the formation in the early stages of healing of bridges of fibrin between the edges of the wounds.