Alternative treatment aims not only to minimize the patient's complaints, but also to restore the skin barrier function as quickly as possible in order to reduce the effects of irritants or allergens.
Crusts should be first removed gently by a tepid water bath, preferably supplemented with anti-inflammatory agents (e.g., wheat bran) and bath oil, or by wet dressings. With efficient anti-inflammatory treatment itching also resolves in many cases.
Most drugs used in dermatology are topical: they are applied to the skin surface in the form of ointments, creams, lotions, gels, and powders.
Topical drugs have advantages over systemic drugs. They deliver the medication directly to the organ that needs treatment - sometimes called the target organ - the skin. Topicals are also less likely to provoke systemic side effects than systemic drugs are.
A topical drug cannot be effective if it does not penetrate the skin's outer protective layer and deliver its healing medication. Penetration through the skin is affected by the condition of the skin itself and the physical and chemical properties of the two parts of a topical dermatologic drug: the active, the vehicle and the presence of skin enhancer.
Topical herbal drugs can be an alternative for treating skin ailments if we take into consideration their benefit/risk ratio compared to synthetic drugs. Many of the well-known plants are currently widely accepted by patients because of their heeling power. The efficacy of herbal drugs, their extracts and isolated substances can be deduced from pharmacological and biochemical in vitro experiments. Clinical trials are very promising (24).
ALL PURPOSE PHYTOCORT OINTMENT
Dermatitis is a complex clinical picture that must be comprehended not merely as skin disease, but rather as disturbances of the entire organism. An alternative to academic medical treatments is therapy with natural remedies, in view of the fact that they act upon the pathological process of the diseases in accordance with the particular drug-symptom complexes involved (25).
The skin healing formulations of Multipurpose Phytocort Cream is optimized in terms of macroscopic characteristics including spreadability, penetrability, and lipidity. Some of the ingredients are fat-soluble while others are more hydrophilic. In order for All Purpose Phytocort dermal preparation to contain the whole complex of the drug constituents, oil in water emulsion have been prepared, in which both phases of the emulsion system are enriched by the pertinent lipophilic and hydrophilic ingredients and mixed together in a latter step. A modification of the composition and a selection of the emulsifier can modify the structure, type of cream, as well as its viscosity from the aspect of achieving optimal application and effect (26). Thus the optimized formulation, which is emulsion of oil in water, results in enhanced diffusion of active ingredients.
The ointment is usually soft, white, non-greasy, and it vanish when rubbed into the skin. Ointment is a versatile vehicle that is useful in a wide range of skin diseases. They are easy to rub in and do not feel tacky or greasy.
THE GOAL OF ALL PURPOSE PHYTOCORT OINTMENT
|1.||Modulates the immune system.|
|2.||Exhibits anti-inflammatory action.|
|3.||Inhibits the release of proinflammatory cytokines.|
|4.||Increases the epidermal lipids.|
|5.||Exhibits moisturizing effect and maintain normal transepidermal water loss.|
|6.||Exhibits antibacterial, antiviral and antifungal effect.|
|7.||Increases the resistance of blood vessels.|
|8.||Exhibits Antioxidant activity (oxygen and nitrous oxide free radicals scavenger).|
|9.||Relieves the pruritis.|
|10.||Modulate fibroblast hyperproliferation during epithelial regeneration.|
TEA TREE OIL
Tea tree oil has been found to be useful in removing transient skin flora while suppressing but maintaining normal resident flora (27).
Terpinen-4-ol, alpha-Terpineol and Alpha-pinene are the active constituents in tea tree oil. They were found to be active against Propionibacterium acnes, Staphylococcus aureus, and Staph. Epidermidis (28). Studies showed that 32 strains of Propionibacterium acnes are susceptible to the essential oil of Melaleuca alternifolia, tea tree oil. The minimum bactericidal concentration of tea tree oil for five strains was 0.25% or less while, for the remainder, it was 0.50% (29). Isolates of Staphylococcus aureus tested were susceptible to the Tea tree essential oil. Of the isolates tested, 64 were methicillin-resistant S. aureus and 33 were mupirocin-resistant (30).
The in vitro antifungal activity of tea oil, the essential oil of Melaleuca alternifolia, has been evaluated against 26 strains of various dermatophyte species, 54 yeast, among them 32 strains of Candida albicans and other Candida sp. as well as 22 different Malassezia furfur strains. Tea tree oil was found to be able to inhibit growth of all clinical fungal isolates (31).
Randomized clinical trial has been performed on 124 patients to evaluate the efficacy and skin tolerance of 5% tea-tree oil in the treatment of mild to moderate acne, and compared with 5% benzoyl peroxide lotion. The results of this study showed that both 5% tea-tree oil 5% benzoyl peroxide had a significant effect in ameliorating the patients' acne by reducing the number of inflamed and non-inflamed lesions (open and closed comedones) although the onset of action in the case of tea-tree oil was slower. Encouragingly, fewer side effects were experienced by patients treated with tea-tree oil (32).
BORAGE OIL (A Source of Polyunsaturated fatty acids)
The skin epidermis displays a highly active metabolism of polyunsaturated fatty acids. Deficiency of Linoleic acid and gamma lenolenic acid precursors of arachidonic acid results in characteristic scaly skin disorder and excessive epidermal water loss. Arachidonic acid is metabolized into prostaglandins. It has been found that prostaglandins modulate normal skin physiological processes at low concentrations and inflammatory reactions at high concentration. Thus, appropriate supplementation with purified vegetable oils rich in arachidonic acid precursors may generate local cutaneous anti-inflammatory metabolites which could serve as a less toxic in vivo monotherpy or as adjuncts to standard therapeutic regimens for the management of skin inflammatory disorders (33).
Experimental studies showed that arachidonic acid precursor fatty acids are effectively incorporated into the cellular lipid of human keratinocytes (34). Fatty acids have been studied in the hyperkeratotic stratum corneum. The results showed a defect in the maturation of fatty acids. This presents evidence that the abnormality of lipid metabolism can influence the process of desquamation in stratum corneum (35).
Using Borage oil rich in GLA has shown to correct deficiencies in skin lipids in subgroup of patients with atopic dermatitis with clinical improvement of the symptoms (36). Topically applied fatty acid has been found to be able to penetrate to the living cells of normal epidermis, enter into metabolism and significantly modify endogenous epidermal lipids (37).
As it has been proven by studies that gamma-Linolenic acid (GLA), a precursor of arachidonic acid, possesses physiological functions of modulating immune and inflammatory response, various techniques are employed for the enrichment and purification of GLA in borage oil. Highly purified GLA is desired both as a medicine and as an ingredient of cosmetics (38).
Borage oil is a rich source of Essential Fatty Acids that play a fundamental role in all cell membranes of the body, and they are vital for metabolism. The fluidity and flexibility of cell membranes depend on the amount of essential Fatty Acids they have. They are also the precursors of the important short-lived regulating molecules, the prostaglandins (39).
In a clinical study of infantile seborrheic dermatitis, daily topical application of borage oil containing 24% GLA has been studied. It has been suggested that GLA is of importance in maintaining normal transepidermal water loss (40).
The anti-inflammatory effect of GLA-fortified borage oil is due to the modulation of polymorphonuclear-neutrophils generation of proinflammatory leukotriene B-4 (41).
Borage oil rich in gamma linolenic acid has been tested in animals and found to induce epidermal generation of local anti-inflammatory metabolites that have leukotriene inhibition potentials. It has been concluded that it has ameliorative effects on chronic inflammatory skin disorders (42).
Borage oil, being a rich source of arachidonic acid -derived eicosanoid is considered potent modulators of hyperproliferation and inflammation of the skin (43).
Studies showed that Arachidonic acid and linoleic acid mediate their ability to modulate inflammation and epidermal proliferation by being incorporated into epidermal phospholipids (44).
Modern life stress leads to persistent activation of the neuroendocrine stress axis, which causes:
|•||Increased release of oxygen free radicals.|
|•||Increased release of Nitrous oxide radicals.|
|•||Increased release of pro-inflammatory cytokines.|
For the correction of these metabolic states, an adequate supply of plant-based antioxidants, especially flavonoids are indicated. These are plant-based polyphenols, which like vitamins cannot be synthesized by the body. Vitamin E in combination with vitamin C and beta-carotene are currently considered worldwide as the standard antioxidative therapy. For a more reliable antioxidative action, adding a mixture of flavonoids seems preferable (45).
Flavonoids continue to attract wide attention as possible very useful agents for combating free radical pathologies, i.e. the pathological states associated with free radical overproduction (46). Experimental studies showed that Flavonoids, particularly quercetin, the most abundant flavonoid in plants has cytoprotective potential as they are likely to be important in defending human DNA against oxidative attacks (47). Experimental studies have also shown that flavonoids have protective effect on the skin against carcinogenic agents (48).
Flavonoids relieves stress through its clear anxiolytic effect and thus stops the activation of the neuroendocrine stress axis which leads to increased level of oxygen and nitrous oxide free radicals and proinflammatory leukotrienes (49).
Flavonoids have also anti-inflammatory activity. It has been found to have in addition to the strong antioxidant activity, an eicosanoid enzyme inhibition property (50). Studies suggested that bioflavonoids may be a potential lead for a new type of anti-inflammatory agents having dual inhibitory activity of group 11 phospholipase A and cyclooxygenase. It has been proved by animal experimental studies that it has both anti-inflammatory and analgesic property (51).
Flavonoids are natural products widely distributed in the vegetable kingdom and are capable of modulating the activity of enzymes that affect the behavior of many cell systems, suggesting that these compounds may possess significant antiallergic in addition to the anti-inflammatory activities (52). There have been numerous topical applications of plant extracts having flavonoids known as anti-inflammatory compounds. The anti-inflammatory activities, of some plants have been attributed at least in part to the inhibition of arachidonic acid cascade related enzymes by flavonoids (53). The effect of naturally occurring flavonoids on epidermal cyclooxygenas/lipoxygenase was studied. The eicosanoid generated in the epidermis are believed to be involved in various biological activities of the skin. Experimental studies showed that flavonoids inhibit cyclooxygenase and lipoxygenase in various degrees, which explains their anti-inflammatory effect (54).
Flavonoids have been found to display significant antifungal activity (55). A group of polyphenolic bioflavonoids, Proanthocyanidins, have been reported to exhibit a wide range of biological, pharmacological and chemoprotective properties against oxygen free radicals (56). Flavonoids works better when applied topically as they are poorly absorbed from the gut and are subject to degradation by intestinal microorganisms thus the amount remains biologically available may not be of sufficient concentration (57).
The clinical effect of bioflavonoids combined with ascorbic acid has been found to have beneficial effect in treating chronic progressive pigmented purpura as it increases capillary resistance and mediates potent antioxidative radical scavenging activities (58). Animal experimental studies showed that flavonoids have protective activity against skin vascular permeability (59).
NATURAL VITAMIN E (ALPHA TOCOPHEROL)
The stratum corneum, the outermost barrier of the body is frequently and directly exposed to a pro-oxidative environment, including ultraviolet solar radiation. Depletion of vitamin E, being the major lipophilic antioxidant is an early and sensitive in vivo marker of UV induced photo-oxidation (60). UV radiation causes acute adverse effects like sunburn, photosensitivity reactions, or immunologic suppression, as well as long-term sequelae like photoaging or malignant skin tumors. Combined vitamins C and E reduce the sunburn reaction, which might indicate a consequent reduced risk of later sequelae (61).
Studies showed that alpha-tocopherol inhibits UVR- induced epidermal lipid peroxidation, suggesting that this may be one mechanism by which alpha-tocopherol prevents UVR-induced local Immunosuppression. Scavenging of UVR- generated lipid peroxides and reactive oxygen may inhibit loss of cell membrane integrity preventing depletion of lymphocyte numbers, thus protecting from local Immunosuppression (62).
However, application of alpha-tocopherol rich oil before exposure to UVR results in preservation of vitamin E (63). Animal experimental studies showed that topical application of alpha-tocopherol, the most prominent naturally occurring form of vitamin E, inhibits ultraviolet induced photocarcinogenesis and DNA photodamage. The topical application of alpha tocopherol at least 2 hours before exposure to sun is important to allow enough time for cellular uptake of alpha -tocopherol as this is necessary for their optimal photoprotection (64). Clinical studies showed that alpha-tochopherol act synergistically with Ascorbic acid and protect the skin against solar stimulated radiation induced skin inflammation and so suppress the sunburn reaction in healthy volunteers (65).
The presence of ozone (O (3)) in photochemical smog is considered another important health concern. The stratum corneum (SC), the outermost skin layer and the permeability barrier of the skin, represents a sensitive target for O (3)-induced oxidative stress and depletion of vitamin E. Remarkably, repeated low-level O (3) exposures resulted in cumulative oxidative effects in the stratum corneum (66). It has been found that damage of the cutaneous lipids caused by ozone exposure, is an effect that can be attenuated by vitamin E application (67).
Studies showed that vitamin E increased the stratum corneum hydration statistically significantly. There was also evidence of an enhanced water-binding capacity after treatment with vitamin E. For the hydrating effect of vitamin E its concentration is of importance. The optimum concentration turned out to be 5% (68).
Alpha-tocopherol has been found to negatively regulate proliferation of human skin fibroblasts and reduce the signs of aging, as cell proliferation is an important event in the aging process. . When alpha-tocopherol was added to the growth medium at a physiological concentration of 50 microM, cell proliferation was inhibited by 40% in 72 h. Both the duration and concentration of the alpha-tocopherol are important parameters of controlling the proliferation process (69).
The alpha-tocopherol topical treatment increased alpha- tocopherol levels both in the epidermis (62-fold) and the dermis (22-fold), further more it reduces the formation of epidermal lipid hydroperoxides after UV irradiation. Studies showed that topical alpha-tocopherol application enhance the level of epidermal and dermal antioxidants and prevent ultra violet oxidative damage of cutaneous tissue. The underlying mechanism of this effect involves the up-regulation of a network of enzymatic and non -enzymatic antioxidants (70). After topical application of alpha-tocopherol the stratum corneum was found to contain the highest concentration of vitamin E per micro m. thickness. The largest fraction of skin vitamin E following topical application was found in the deeper subcutaneous layer-the lowest layer, the papillary dermis and the dermis contained the major portion of the of the applied vitamin E. Although the papillary epidermis only represents about 16% of the total skin thickness, it contains sebaceous glands, lipid secretory organs and thus may account for the vitamin E affinity of this layer. Hence applied vitamin E penetrates rapidly through the skin but the highest concentrations are found in the uppermost 5 microns (71).
Studies showed that glycolic acid could strongly potentiate the antioxidant action of vitamin E. This suggests the advantage of combining alpha-glycolic acid with these antioxidants in skin-designed preparations, both to improve penetration and availability of antioxidants to epidermal layers and to enhance their protective potential (72).
NATURAL VITAMIN A (RETINOL AND RETINALDEHYDE)
Vitamin A is the generic term for a variety of fat-soluble substances including retinol, retinylaldhyde and retinoic acid. Vitamin A is commonly known as the anti-infective vitamin and has an essential role in cellular differentiation, the latter providing a unique core mechanism helping to explain the influence of vitamin A on epithelial barriers. Vitamin A has an influence on epithelial barrier. Alterations in the epithelial lining of vital organs occur early in deficiency, suggesting a potentially important role for the barrier function (73).
Topical retinoic acid (RA) causes irritation of the skin. To prevent this side effect, natural precursors of retinoic acid have been proposed. The natural retinoids (retinol and retinaldehyde have been found to have a good tolerance profile, in contrast with the irritating potential of retinoic acid (74). However, retinol and retinaldhyde are metabolized by the dermis into retinoic acid. After treatment with retinol and retinaldhyde, low but significant amounts of retinoic acid could be detected in the epidermis, as well as in the dermis. In comparison, treatments with retinoic acid itself, leads to higher level of retinoic acid in the epidermis and in the dermis. Thus the low proportion of retinaldehyde, metabolized into a -tran-retenoic acid, explains the low irritancy profile of topical retinaldehyde and supports the concept of controlled delivery of ligands. Thus the action of retinol or retinaldhyde on the skin is still via a retinoic acid formation through the metabolic function of the dermis (75).
Retinaldehyde (RAL), a natural metabolite of beta-carotene and retinol (ROL), can be used topically in human skin and exerts biological activity; it may be a convenient way to deliver multipotential vitamin A activity in epidermis. Animal experiments indicated that keratinocytes metabolise topical retinaldehyde. Keratinocytes differentiating in vitro exhibit greater capacity for retinoic acid synthesis from retinol or retinaldehyde as compared to nondifferentiated cells (76). Experimental study results suggest that increasing cellular concentration of retinoic acids in in-vitro differentiating keratinocytes is achieved by a process of increased activity of the retinoic acid synthesis (77). Thus the concept of using retinaldehyde as a precursor has been confirmed. The keratinocytes predominantly channel retinaldhyde into storage forms should also be considered as a convenient way to load the epidermis with vitamin A.
It has also been found that after experimental topical application of retinol and retinaldhyde that there was a significant amount of 14-hydroxy-4, 14-retro-ROL (14-HRR), a metabolite that could promote the growth of B lymphocytes (humeral antibodies) and activate T-lymphocytes (cellular immunity), suggests distinct potentials of topical retinol and retinaldhyde (78).
Studies showed that topical retinol appears to improve the resistance of the stratum corneum against some chemical and physical (UV) threat. It also limits UV-induced shallow wrinkling (79).
Retinoids was found to inhibit proliferation of melanocytes and melanoma cells and affect disorders of hypo- and hyperpigmentation. The endogenous concentrations of retinol and its metabolites in melanocytes were found to be five times those in melanoma cells. Dissimilarities in the metabolism and endogenous concentration of retinoids between benign and malignant melanocytes might play a key role in differentiation and growth regulation (80).
NATURAL VITAMIN C (ASCORBIC & ASCORBATE)
Vitamin C (Ascorbic, Ascorbate) is an essential micronutrient involved in many biologic and biochemical functions. Humans cannot synthesize vitamin C because they lack the last enzyme in biosynthetic pathway. Known functions of vitamin C are accounted for by its action as an electron donor or reducing agent. Vitamin C is a specific electron donor for 8 enzymes (81,82). Three of them are enzymes that participate in collagen hydroxylation (important step for keeping a healthy skin. Vitamin C also has non-enzymatic-reductive functions in chemical reactions. Based on its free radical intermediate, vitamin C is a chemical reducing agent (antioxidant) in many intracellular and extracellular reactions. Vitamin c could also decrease oxidative damage in vascular walls (83,84).
Environmental exposure to ultraviolet light B (UVB, wave lengths 290-320 nm) of the solar spectrum causes major damage, including an inflammatory response, in skin. Studies using the human keratinocyte cell line, showed that stable derivative of ascorbic acid, are able to reduce UVB damage. These data suggest that ascorbic acid shows a photoprotective effect against UVB-induced inflammation and damage in human epithelial cells (85). Topical application of ascorbic acid suppresses the cutaneous inflammation induce by ultraviolet irradiation in human and animals. Studies suggested that it prevents the acute inflammation partly through scavenging reactive oxygen species and potentiating the antioxidative activity of alpha-tocopherol (86). Experimental studies showed that ascorbic acid inhibited UVA-induced lipid peroxidation in cultured human keratinocytes in a concentration-dependent manner.
It has also been found that ascorbic acid was able to down regulate the proinflammatory cytokines IL-alpha and IL-6. These findings indicate a major cell-protective effect of ascorbic acid on UVA-induced lipid peroxidation and the secretion of pro-inflammatory cytokines by UVA irradiated human keratinocytes (87).
Calendula Officinalis L has gained importance in the process of rediscovering natural healing forces. Increasing significance is contributed to calendula ointment, which have been used traditionally for a long time
Calendula extracts is characterized by a high level of terpenoids e.g. saponosides in the form of oleanolglycosides and triterpene alcohols. The triterpenediol-3-monoesters consist for 85% of Faradiol esters.
Calendula extract is a rich source of carotinoids. The colour of the flowers depends on their content of carotinoids (88).
Also remarkable is the fat oil of the seeds which predominately consists of the conjugated trienoic calendula acid (88).
Calendula preparations are mainly used for the treatments of wounds and for cosmetical purposes (88). Dressing materials containin Calendula Officinalis ointment applied to experimental animal's wounds has been found to enhance the tissue repair (89). Topical application of Calendula Officinalis markedly stimulates physiological regeneration and epithelization. This effect is assumed to be due to more intensive metabolism of glycoproteins, nucleoproteins and collagen proteins during the regenerative period in the tissue (90). Medicinal herbs containing Calendula extract has been found to be stimulating to the wound healing process by their antifungal/antibacterial qualities. Some investigators reported that the wound-healing period for Calendula Officinalis is shorter than that of the witness (91).
Animal experimental studies showed that the green leaf juice of C. Officinalis produced significant analgesia; pain threshold increased by 58.9 and 62.15 to that of control. It has been also found to have anti-inflammatory action (92).
Studies proved the anti-inflammatory action of Calendula Officinalis (93). The triterpenoids has been shown to be the most important anti-inflammatory principles of Calendula extracts. The anti-inflammatory activity was proportional to their content of Faradiol monoester, which can be taken as a suitable parameter for the quality control of Calendula preparations (94, 95). Whole plant extract differ from that of the flowers by the presence of monoterpene hydrocarbons, essential oil, in addition to the alcohols
Calendula Officinalis extracts has been found to have anti-edematous activity due to its Faradiol esters content which is dose dependent activity (96).
Calendula extract is a rich source of Flavonoids. Characteristic calendula-flavonoids are the isorhamnetin glycosides. The total flavonoids in calendula Officinalis flowers in the ligulate rayflorets and tubular disc-florets were found to be 0.88 and 0.25% respectively (97).
The saponins isolated from Calendula Officinalis were tested for its toxic and mutagenic activities. All the saponins were found to be non-toxic and non-mutagenic for doses of 400.mu g (98).
In a multicentre observational study, 127 patients with various types of dermatitis were administered a homeopathic complex including viola tricolor. In 119 of 127 cases, clear improvement with no side effects was observed (99).
Viola tricolor extract is a rich source of antioxidants. The total flavonoid contents were determined using rutin as the standard. Rutin content was highest in Viola tricolor flowers among 11 plants species collected in Turkey (100).
Extract of viola tricolor was found to have antifungal activity and is effective against trichophyton mentagrophytes (101).
It exhibits antihistaminic effect. Animal experimental studies showed that en-yen dicycloether fraction of the essential oil of chamomile inhibits the release of histamine from the protamine sulphate-provoked degranulation of mast cells, which is the cause of allergic symptoms (102).
Chamomile extract has been found to exert anti-inflammatory activity in vivo, and so it is used for the treatment of inflammatory skin diseases. Its activity is due to the Chamazulene component of the extract, which inhibits the formation of leukotriene B-4 in neutrophilic granulocytes and additional antioxidative effect lead to blocking the chemical peroxidation of arachidonic acid (103).
It has also been proved by experimental studies that chamomile extract demonstrated clear antidermatophytic activity (104).
Animal experimental study showed that a long-term exposure to low doses of the heteropolysaccharides from chamomile flowers enhance the immune response to bacterial infection and it has been concluded that chamomile extract has the ability to modulate the immune system (105). From the essential oil components: alpha-bisabolol and Chamazulene has the strongest activity on Gram-positive and Gram-negative bacteria and on pathogenic fungi (106).
The fruits of Rosa canina (Rosaceae) are very rich in carotenoids. Chromatographic analysis revealed the major carotenoids to be beta-carotene, lycopene, beta-chryptoxanthin, rubixanthin, zeaxanthin and lutein (107).
Rosa canina contains vitamin C content is in high proportions. The analysis showed the vitamin C contents were 1200-mg/100 g in the frozen fruits and 2000 mg/100 g in the dried fruits (108).
Extracts of Rosa canina routs showed anti-inflammatory activity. Laboratory experiments showed its in vitro inhibitory effects on interleukin-1 (IL-1alpha, IL-beta) and tumor necrosis factor (TNF- alpha) biosynthesis in various percentages depending upon the concentration that explains its anti-inflammatory effect and support their folkloric utilization (109).
The efficacy of the Echinacea root extract as an immunomodulatory has been demonstrated in studies of viral and bacterial infection. The therapeutic superiority of the herbal immunomodulatory over placebo was confirmed as statistically significant and clinically relevant. Studies also demonstrated its efficacy as an immunobalancing agent, which is an antigen-independent mode of phytoimmunomodulation (110).
The mother tinctures of Echinacea have shown high inhibitory effect against Staphylococcus epidermidis (111).
Topical application of Echinacea containing ointment has been found to have good antiviral activity against both acyclovir resistant and acyclovir susceptible strains of HSV-1 and HSV-2 anti herpes simplex virus (HSV) (112). Laboratory experiments showed that macrophages cultured in concentrations of Echinacea as low as 0.012 mug/ml produced significantly higher levels of IL-1, TNF-alpha, IL-6 and IL-10 than unstimulated control cells. The high levels of IL-1, TNF-alpha, and IL-10 induced by very low levels of Echinacea are consistent with an immune activated antiviral effect (113).
Echinacea stimulates wound-healing process by their antifungal/antibacterial qualities. Its locally applied form is well received by the tissues, without irritation, their action being primarily local rather than general as has been noticed from the paraclinic exams (114).
The Echinacea Purpurea flowers have more anti-inflammatory activity than the routs (115). Polyunsaturated alkamides isolated from Echinacea were shown to possess inhibitory activity in in-vitro cyclooxygenase and 5- lipoxygenase (116).
Echinacea Purpurea stimulates the neutrophil phagocytosis. Echinacea treatment of mice, immunosuppressed with immunosuppressive drugs, restored their resistance against lethal infections with the predominantly granulocyte-dependent Candida albicans through stimulating the phagocytic activity (117,118). Polysaccharides purified from Echinacea purpurea were found to have antistaphylococci activity. These substances enhanced the ability of granulocytes to kill staphylococci. Also activate monocytes to secrete TNF-alpha, IL-6 and IL-1. Altogether, as in mice, the polysaccharides could induce acute phase reactions and activation of phagocytes in human (119).
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