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Chapter 9 Medicinal and aromatic plants used in burn treatment 333
9.2.5 Advantages and disadvantages of herbal treatments
The use of medicinal and aromatic plants should be evaluated with both their advantages and limitations. Although there are many positive aspects that have made these
approaches widespread in burn treatment, some disadvantages should also be taken
into consideration.
9.2.5.1 Advantages
Natural and safe use: Herbal treatments generally carry less risk of toxicity due to
their natural origin. Allergic reactions or side effects are quite rare when used in the
right dosages [7].
Accessibility and affordability: Medicinal and aromatic plants can be found naturally in wide geographical areas and are low-cost. This makes them widely preferred,
especially in low-income communities.
Multifaceted mechanisms of action: Many medicinal plants act on more than one
biological process at the same time. For example, Aloe vera offers anti-inflammatory,
antibacterial, and moisturizing effects together.
Traditional knowledge and cultural origins: Herbal treatments have been accepted in society because they are based on traditional knowledge passed down
through generations. Modern science has supported this information and created a
more reliable basis.
9.2.5.2 Disadvantages
Lack of standardization: The effectiveness and reliability of medicinal plants may
vary depending on the type of plant used, the region where it grows, and the processing methods. This leads to uncertainties in terms of dosage and effectiveness [8].
Lack of clinical data: In cases where information based on traditional use is not
sufficiently supported by scientific research, the effectiveness of these treatments
may be questioned.
Risk of side effects and interactions: Although herbal treatments are natural, they
may have toxic effects when used in the wrong doses. In addition, they may interact
with pharmacological drugs and cause negative results.
Need for long-term treatment: Herbal treatments generally show effects over a
longer period of time than pharmacological treatments. This may be a disadvantage,
especially in acute burn cases.
Figure 9.2: Medicinal and aromatic plants used in burn treatment.
334 İlayda Bersu Kul et al.
9.3 Medicinal and aromatic plants used in burn treatment
Medicinal and aromatic plants used in burn treatment contain many bioactive compounds that accelerate wound-healing processes, reduce inflammation, prevent infection, and are effective in pain management. These plants have been at the center of
traditional treatment practices throughout history and are now the subject of modern
pharmacological research [9]. Medicinal and aromatic plants used in burn treatment
are shown in Figure 9.2.
9.3.1 Aloe vera
Aloe vera is a plant belonging to the Liliaceae family, widely grown in tropical and
subtropical regions. The therapeutic properties of the plant are attributed to the gelform content found especially in the inner part of its leaves.
Phytochemical content and mechanisms: Aloe vera gel is rich in polysaccharides,
glycoproteins, enzymes, amino acids, vitamins (A, C, and E), and minerals. In particu-
Chapter 9 Medicinal and aromatic plants used in burn treatment 335
lar, a polysaccharide called acemannan in its content draws attention with its immunomodulatory and wound-healing effects. In addition, salicylic acid and sterols, which
have anti-inflammatory effects, suppress inflammation in burn wounds and accelerate tissue repair [10].
9.3.1.1 Clinical effects
Moisturizing and epithelialization effect: Aloe vera accelerates the epithelialization
process in burn wounds by increasing cell proliferation and supporting fibroblast activity. Its moisturizing effect preserves the elasticity of damaged tissues and prevents
the wound area from drying out [11].
Anti-inflammatory and antiseptic properties: The anti-inflammatory effect of Aloe
vera occurs through the suppression of inflammatory cytokines (TNF-α and IL-1β). In
addition, the natural pH level of the gel prevents the proliferation of microorganisms,
reducing the risk of infection [12].
Aloe vera is applied topically, especially in first- and second-degree burns. Studies
show that burn wounds treated with Aloe vera gel heal faster and have significantly
reduced pain levels compared to conventional treatments [13].
9.3.2 Calendula officinalis (Calendula)
Calendula officinalis is a plant belonging to the Asteraceae family and has long been
used medicinally for its wound healing and antiseptic properties. Also known as “Ca-
lendula,” this plant is widely used in traditional medicine, especially for skin problems
[14].
Phytochemical content and mechanisms: Calendula flowers contain bioactive
components such as flavonoids, saponins, carotenoids, triterpenes and volatile oils.
The anti-inflammatory effect of flavonoids occurs through the suppression of prostaglandin synthesis, while carotenoids support tissue repair and regeneration [15].
Cell regenerative properties: Calendula accelerates wound healing by increasing
fibroblast proliferation and collagen synthesis. This cell regenerative property is especially effective in the formation of granulation tissue [16].
Antiseptic effect: Calendula’s essential oils have antimicrobial effects against both
gram-positive and gram-negative bacteria. In this way, it reduces the risk of infection
and ensures safe wound closure.
Usage areas: Calendula’s tincture, ointment, and cream preparations are widely
used in the treatment of superficial burns. Clinical studies have shown that Calendula
ointments shorten the wound closure time and reduce scarring.
336 İlayda Bersu Kul et al.
9.3.3 Centella asiatica (gotu kola)
Centella asiatica is a tropical plant belonging to the Apiaceae family and has a long
history in Asian traditional medicine, especially in the treatment of skin diseases. The
wound-healing effects of the plant have also been supported by modern science [17].
Phytochemical content and mechanisms: Centella asiatica is rich in triterpenoid
saponins (especially asiaticoside, madecassoside), flavonoids and phenolic compounds. These compounds support collagen synthesis and angiogenesis by increasing
fibroblast activity at the cellular level.
Collagen synthesis-enhancing effect: Centella asiatica improves wound strength
by increasing Type I and Type III collagen synthesis in wound tissue. This feature ensures that the scar tissue formed after burns is more regular.
Anti-inflammatory and antioxidant properties: Asiaticoside and madecassoside
reduce inflammation by suppressing the release of inflammatory mediators. It also
reduces oxidative stress thanks to its free radical scavenging properties.
Centella asiatica is used in first- and second-degree burns in cream and gel forms.
In clinical studies, faster epithelialization and granulation were observed in burn
wounds where Centella asiatica was applied. In addition, it was reported that scar formation was less.
In addition to commonly used plants such as Aloe vera, Calendula officinalis, and
Centella asiatica, other important plants such as Hypericum perforatum, Syzygium aromaticum (clove), and Lavandula angustifolia (lavender) also stand out with their thera-
peutic properties. St. John’s wort has strong antimicrobial and anti-inflammatory effects
thanks to the hypericin and hyperforin compounds it contains, making it a valuable option in preventing post-burn infections. In addition, due to its cell regenerative properties, it contributes to tissue healing, especially in deep burns. Clove, on the other hand,
has a strong bioactive compound, eugenol, which relieves pain with its local anesthetic
effect, while also reducing the risk of infection with its antiseptic properties. Lavender,
on the other hand, has calming and anti-inflammatory effects due to its linalool and
linalyl acetate content; these properties are used to both reduce pain and support the
healing process in burn wounds [18].
Herbal treatments are not limited to the use of a single plant. In traditional medicine and modern practices, combination treatments that include more than one plant
are seen to yield more effective results. For example, herbal formulations using Aloe
vera and Calendula officinalis together accelerate the healing process thanks to the
synergistic effects of both plants. Similarly, topical applications using lavender oil and
clove oil together have been effective in both managing pain and reducing inflammation. Since herbal pastes and oils used in traditional mixtures are less processed than
modern formulations, they can preserve natural phytochemical diversity, which can
contribute to treatment [19]. Herbal treatments also vary in terms of formulation
forms. Herbal creams, ointments, gels, and tinctures are frequently used, especially in
burn treatment. While Aloe vera-based gels attract attention with their moisturizing
Chapter 9 Medicinal and aromatic plants used in burn treatment 337
and healing properties, ointments containing Calendula officinalis accelerate wound
closure by supporting granulation tissue. In addition, essential oils such as lavender
and clove play a complementary role in pain and stress management with aromatherapy applications. Sterile plant extracts combined with dressing materials offer a practical and effective option for healing burn wounds.
The integration of traditional and modern medical approaches is also important
in the use of herbal treatments. The methods used in traditional medicine are based
on thousands of years of knowledge and are generally supported by modern research.
For example, the wound healing properties of Centella asiatica in Ayurvedic medicine
and the skin rejuvenating effects of Aloe vera in Chinese medicine are frequently emphasized. In Anatolian medicine, Hypericum perforatum oil prepared with olive oil is
still a popular option in burn treatment. Modern research has proven the effectiveness of these traditional practices in laboratory and clinical studies, enabling the development of more reliable treatment methods [20].
Herbal treatments attract attention not only with their effectiveness but also with
their safety profiles and standardization problems. The amount and quality of active
compounds contained in such products vary depending on many factors such as the
plant’s growing conditions, harvest time, and processing methods. For example, the
hypericin content of Hypericum perforatum may vary in different geographical regions, which directly affects the therapeutic effect of the product. In addition, some
plants have potential side effects; for example, Hypericum perforatum is known to increase sensitivity to the sun. Therefore, standardization studies are of great importance for the safe use of herbal products.
In the future, research on medicinal and aromatic plants used in burn treatment
is expected to be combined with innovative approaches such as nanotechnology and
biomaterials. Formulating herbal extracts into nanoemulsions can allow active ingredients to reach tissues more quickly and in a more targeted manner. In addition, biodegradable wound dressings enriched with plants such as Aloe vera have the potential
to accelerate the healing process while reducing the risk of infection. With the advancement of pharmacogenetic research, it will also be possible to develop individualized herbal treatment approaches. Such innovations will further strengthen the integration of herbal treatments with modern medicine.
9.4 Molecular basis of plant action mechanisms
Medicinal and aromatic plants exhibit anti-inflammatory, antimicrobial, and woundhealing effects through their biologically active components. These effects occur
through multifaceted mechanisms at the cellular and molecular levels, depending on
the chemical composition of the plants. These active components, called phytochemicals, provide therapeutic effects such as suppressing inflammation, preventing micro-
338 İlayda Bersu Kul et al.
organism growth and accelerating tissue regeneration by intervening in biological
processes. The mechanisms of action of plants used in burn treatment are of great
importance, especially in terms of regulating inflammation, preventing infections and
supporting the wound healing process [21].
Anti-inflammatory mechanisms: Burns are pathological conditions in which an
inflammatory response is triggered as a result of thermal, chemical or mechanical
trauma to the tissue. Controlling inflammation is a critical process to facilitate tissue
healing after burns. Medicinal plants exert their anti-inflammatory effects through
various phytochemicals. Compounds such as flavonoids, tannins, alkaloids, and terpenoids stand out in this mechanism [22].
Suppression of pro-inflammatory cytokines: Flavonoids and phenolic compounds
suppress the production of pro-inflammatory cytokines (e.g., TNF-α, IL-6, and IL-1β)
that play a role in the inflammatory process. These compounds regulate macrophage
activity and reduce the severity of inflammation by inhibiting inflammatory pathways
such as nuclear factor kappa B (NF-κB). For example, aloemodin found in Aloe vera
has an anti-inflammatory effect by suppressing the NF-κB signaling pathway [23].
Reducing inflammation with antioxidant effect: Another important trigger of inflammation in burns is oxidative stress. Antioxidant compounds such as flavonoids
and carotenoids prevent lipid peroxidation and tissue damage by neutralizing reactive oxygen species (ROS). This mechanism helps alleviate the inflammatory response
and protect tissues [24].
Enzyme inhibition: Plant compounds reduce the production of prostaglandins
and leukotrienes by inhibiting cyclooxygenase (COX) and lipoxygenase (LOX) enzymes
that play a role in inflammation. For example, asiaticoside in Centella asiatica provides an anti-inflammatory effect by inhibiting the COX-2 enzyme [25].
Antimicrobial mechanisms: Burn wounds require antimicrobial treatment due to
their susceptibility to infection. Medicinal plants prevent the growth of microorganisms through antimicrobial compounds to reduce the risk of infection. These compounds work with different mechanisms of action on bacteria, fungi, and viruses.
Effect on cell wall and membrane: Essential oils and phenolic compounds increase permeability in bacterial cell membranes, causing loss of intracellular contents. Lavandula angustifolia (lavender) essential oil disrupts the lipid layer on the
cell membrane, leading to bacterial lysis. This mechanism, which is especially effective against gram-negative bacteria, is important in preventing infections.
Inhibition of protein synthesis: Plant compounds bind to ribosomal RNA, inhibiting protein synthesis and stopping bacterial proliferation. Eugenol, found in Syzygium
aromaticum (clove), binds to bacterial ribosomes and exerts this effect.
Interference with enzymatic functions: Plant alkaloids bind to the active sites of
bacterial enzymes, stopping metabolic processes. Terpenoids found in tea tree oil inhibit enzymes that play critical roles in energy production, such as ATP synthase [26].
Preventing biofilm formation: Bacteria can become resistant to treatment by
forming a biofilm in the wound. Herbal compounds break this resistance by prevent-
Chapter 9 Medicinal and aromatic plants used in burn treatment 339
ing bacterial cells from adhering to the surface or by breaking down the biofilm
layer. Hypericum perforatum (St. John’s wort) has strong antibacterial properties that
prevent biofilm formation.
9.4.1 Cellular mechanisms in wound healing
Processes such as fibroblast proliferation, collagen synthesis, and angiogenesis are of
critical importance in tissue repair after burns. Medicinal plants accelerate wound
healing as they contain bioactive compounds that regulate these processes [27].
Fibroblast proliferation and extracellular matrix production: In wound healing,
fibroblasts play an important role in restoring tissue integrity by synthesizing extracellular matrix proteins such as collagen and elastin. Madecassoside found in Centella
asiatica supports collagen production by increasing fibroblast activity and accelerates
wound healing.
Collagen synthesis: Collagen is necessary to increase the strength of wound tissue.
Triterpenoids found in medicinal plants contribute to the wound healing process by
inducing collagen synthesis. For example, Calendula officinalis activates fibroblasts,
increases collagen production, and accelerates the formation of granulation tissue.
Angiogenesis: New blood vessel formation is a critical process for the nutrition
and oxygenation of tissues after burns. Herbal compounds stimulate angiogenesis by
activating the vascular endothelial growth factor (VEGF) signaling pathway. Polysaccharides found in Aloe vera promote the proliferation of endothelial cells and support
the formation of new blood vessels.
Support for epithelialization: Medicinal plants accelerate the epithelialization
process by increasing the migration and proliferation of epidermal cells. For example,
Lavandula angustifolia accelerates wound closure by stimulating epithelial cell renewal on the wound surface.
9.4.2 Innovative research methods in herbal treatments
The combination of traditional herbal treatment methods with modern science requires the use of innovative research approaches. These approaches facilitate the understanding of herbal treatments at the molecular and biochemical level, allowing for
the development of more effective and safe therapeutic options. Advanced research
methods, especially omics technologies and in silico modeling, play a critical role in
understanding the mechanisms of action of herbal compounds and determining their
pharmacological potential.
340 İlayda Bersu Kul et al.
9.4.2.1 Omic technologies: genomic, proteomic, and metabolomic approaches
Omic technologies are scientific methods that systematically and comprehensively analyze the biological processes of living systems. These technologies allow us to better
understand the biological effects of herbal compounds by examining the effects of
herbal treatments at the cellular and molecular level:
1. Genomic approaches: Genomic analyses play an important role in understanding
the genetic structures of medicinal and aromatic plants. These methods allow the
identification of the genetic material responsible for the biological activities of
plants. For example, genes responsible for the anti-inflammatory effects of a particular plant can be identified, and the expression profiles of these genes can be
examined to determine under which conditions the plant is more effective. In addition, genomic technologies are also used to understand the resistance mechanisms of plants to environmental stress factors such as climate change [28].
2. Proteomic approaches: Proteomics analyzes the structure, quantity, and function
of proteins affected by herbal compounds. This approach is valuable for understanding how plants used in burn treatment interact with specific proteins involved in collagen synthesis or inflammation processes, for example. Proteomic
analyses can reveal which biological pathways herbal treatments modulate and
the role of this modulation in therapeutic effects [29].
3. Metabolomic approaches: Metabolomics is a discipline that studies the effects of
plant compounds at the intracellular and extracellular metabolite level. This
method is important for understanding how the active compounds contained in
plants contribute to changes in human metabolism. For example, metabolomic
analyses can show how polyphenols found in plants such as Aloe vera suppress
inflammatory processes. In addition, metabolomic data can be used to understand the synergistic effects of combinations of different plants.
9.4.2.2 In silico modeling: computer simulations and artificial intelligence
applications
In silico modeling is an advanced research method that simulates the interaction of
plant compounds with biological systems in a computer environment. This method
offers a rapid and low-cost screening process before experiments are conducted in a
laboratory environment and is an important tool in determining potential pharmacological targets of plant therapies:
1. Molecular docking studies: Molecular docking is an in silico modeling method that
predicts how plant compounds bind to specific proteins. For example, the binding
capacities of compounds responsible for the anti-inflammatory effects of a plant extract used in burn treatment with target proteins such as NF-κB or COX-2 that play
Figure 9.3: Burn treatment healing process.
Chapter 9 Medicinal and aromatic plants used in burn treatment 341
a role in inflammatory processes can be analyzed with this method. These analyses
play an important role in prioritizing potential therapeutic candidates [30].
2. Pharmacokinetic and toxicity simulations: It is possible to predict information about
the absorption, distribution, metabolism, and excretion processes (ADME) of plant
compounds through pharmacokinetic simulations. Such simulations play a critical
role in understanding the safety profiles of herbal products and in dosage optimization. Furthermore, potential toxic effects can be analyzed using in silico toxicity prediction models, and formulations can be adapted to reduce side effects [31].
3. Artificial intelligence and machine learning: Artificial intelligence and machine
learning algorithms help predict the effects of herbal treatments by analyzing relationships in large data sets. For example, data sets created with patient data
and literature reviews can be used to determine the most effective herbal extracts
for a particular type of burn. These methods can also predict the effects of combinations of herbs used in burn treatment and provide recommendations to optimize the most effective combinations [32].
Omic technologies and in silico modeling strengthen the scientific basis of herbal
treatments by providing a deeper understanding of their biological mechanisms.
These innovative approaches are accelerating the integration of herbal treatments
with modern medicine and providing new opportunities for personalized medicine
342 İlayda Bersu Kul et al.
applications. In the future, the wider use of these methods will contribute to the development of sustainable and innovative treatment options, as well as optimize the
efficacy and safety profiles of herbal treatments [33].
Due to the involvement of blood vessels, the tissue has a granular texture (granulation tissue). Finally, within the granulation tissue, differentiated fibroblastic cells
(myofibroblasts) begin to remodel the extracellular matrix approximately 1–2 weeks
after injury. Extracellular matrix remodeling accompanied by resident cell apoptosis
leads to the formation of an acellular scar. Medicinal plants and their metabolites
used in the treatment of different types of wounds are shown in Figure 9.3 and
Table 9.1 [34].
Table 9.1: Plants used in burn treatment.
No. Traditional
name
Henna Lawsonia inermis L. Lythraceae Cold and dry Leaf Natool
Hofariqan Hypericum
Ass Myrtus communisL.Myrtaceae Cold and dry Leaf/fruit Natool, Duk,
Khobazi Malva sylvestris L. Malvaceae Cold and wet Leaf Natool and Zemad
Zaitoon Olea europaea L. Oleaceae Hot and dry
Semsem Sesamum indicumL.Pedaliaceae Hot and wet Seed/
Sousan Iris spp. Iridaceae Hot and dry Leaf/bulb Natool and Zemad
Sanober Pinus pinea L. Pinaceae Hot and dry Bark/leaf Tela and Zemad
Selgh Beta vulgaris L. Amaranthaceae Hot and wet Leaf Tela
Ghalioon Gallium verum L. Rubiaceae Hot and dry Flower Zemad
Loban
(kondor)
Scientific name Family Characteristics Part
used
Hypericaceae Hot and dry Leaf Zemad
perforatum L.
Fruit Zemad
(ripe fruits)
seed oil
Boswellia carterii
Birdw.
Burseraceae Hot and dry Oleogum
resin
Dosage form
Marham, Qeiroot,
and Zemad (with
olive oil)
(with olive oil)
Zemad
(with Dokar el
ward)
Zemad (with oily
base)