Evaluate the Anti-Fungal Effects of Zataria multiflora Extract on Candida albicans Isolated from Patients in Zabol

AUTHORS

Khadije Rezaie Keikhaie 1 , Saphora Bazi 2 , * , Saeedeh Ghorbani 3 , Javad Roustakhiz 4 , Zahra Shahi 5

AUTHORS INFORMATION

1 Obstetrics and Gynecology Department, Maternal and Fetal Health Research Center, Zabol University of Medical Sciences, Zabol, Iran

2 Department of Biology, Payam Noor University, Tehran, Iran

3 Department of Biology, Faculty of Science, Payam Noor, University of Tehran, Tehran, Iran

4 Higher Educational Complex of Saravan, Saravan, Iran

5 Department of Microbiology, Islamic Azad University, Kerman Branch, Kerman, Iran

ARTICLE INFORMATION

Gene, Cell and Tissue: 5 (1); e58892
Published Online: October 31, 2017
Article Type: Research Article
Received: July 30, 2017
Revised: September 2, 2017
Accepted: October 10, 2017
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Abstract

Background: The overgrowing resistance of the species of candida toward anti-fungus drugs has necessitated the use of compounds with antifungal features. Some plants have antimicrobial features due to their polyphenols components. This paper aims at exploring the anti-fungus effects of Zataria multiflora against Candida albicans.

Methods: A total of 20 g of the dried and pounded leaves of the Zataria multiflora was used and its extract was prepared in the rotary device. Various concentrations of all extracts were prepared in the 96 cell microplate. MIC and diameter of the inhibitory shield were measured by dilution method and agar disk, respectively.

Results: The Zataria multiflora extract showed good antifungal effects against Candida albicans sample. Therefore, this plant extract can replace chemical drugs and be used against candida-caused infection upon completion of this research trend.

Conclusions: In the present study the principles of the extract, different methods of minimum inhibitory concentration (MIC), and mode of action of the extract are discussed.

Keywords

Antifungal Effects Extract Zataria multiflora Candida albicans

Copyright © 2017, Gene, Cell and Tissue. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited
1. Background

Candida albicans are a natural fungus in the body of animals and humans. This fungus, depending on the nature of the host, creates 2 groups of infections: surface infections that are seen in healthy people and deep infections (such as: pulmonary, digestive, urinary, and candida) occur in people with severe immune deficiency. Candidiasis is recognized as the most common invasive fungal infection in patients. Most infections are caused by Candida albicans with an internal source and approximately 60% to 90% of the relevant infections have been isolated. Most people get this fungus at birth as they pass through the delivery channel. Candida albicans live in the body in balance with other microorganisms and it is a common saprophyte on mucosal surfaces, especially the mouth, digestive system and vagina, however, various factors can upset this balance and can lead to active progressive symptomatic disease (1).

Vaginitis is a genital disease that accounts for over 10 million medical visits per year. The most common causes of vaginitis are bacteria. Candida albicans are the second leading cause of this infection. Also, the most common yeast isolated from the vagina is Candida albicans (85% to 90%), and it affects women with symptoms such as swelling, redness, burning, and itching of the lips of the vagina, as well as white secretions (2).

Candida infections should be treated due to the fact that they may be released in neutropenic patients with immunodeficiency. The treatment of such infections is a big challenge because the resistance of pathogens has risen to a number of medicine that are widely used (3).

Zataria multiflora is one of the most well-known herbs of mint. This plant is a plant with a height of 40 to 80 cm, green-white, fragrant, numerous stalks, resistant and firm, as well as gray-white or to slightly brownish skin. The leaf of Zataria multiflora is small and has a short petiole (4, 5).

Zataria multiflora has a drug use in traditional medicine of Iran and Europe. In general, phenolic compounds are responsible for the anti-bacterial properties of extracts and essential oils (6).

Zataria multiflora essential oils include carvacrol, thymol, and eugenol. Thymol has a scented smell as well as a spicy taste, and is an anti-fungal and antibacterial agent. Thyme has analgesic and anti-convulsion properties. It increases the intelligence and perception and is effective in treating hepatic failure. In addition, it streams the blood and strengthens sexual and reproductive organs in the body (7).

The aim of this study was to evaluate the anti-fungal effects of Zataria multiflora on C. albicans isolated from patients in Zabol.

2. Methods
2.1. Plant Material
2.1.1. Sample Preparation

The leaves of Zataria multiflora was collected in Iran (Zabol, south-eastern, Iran). Samples were identified and approved by a botanist at the Kerman branch of the Islamic Azad University’s Herbarium and were dried at room temperature. Samples were crashed and transferred into glass containers and were preserved for the extraction procedures, which were performed in the laboratory. The leaves of the herb were dried in the shadow down the appropriate status, were grinded in a grinder until homogenized to a good powder, and then maintained at room temperature for further studies (8).

Plant extraction herb extraction, was carried out using the maceration method. For this aim, 10 gr of dried powder of the Z. multiflora leaf was put in 0.5 lit Erlenmeyer flask containing 100 ml of ethanol, methanol, ethyl acetate, and chloroform extracts. The flask content was blended by applying a shaker in the room temperature with the speed of 130 rpm for 24 hours, and was then filtered from Whatman No. 2. The solvent was obsolete, and concentrated from the juice using a rotary evaporator (Heidolph, Germany), and was dried after being passed from a microbial filter with 0.45 micro meter pores in 60°C temperature for 2 days. The get extract was weighted and solved in DSMO solvent and was kept in the refrigerator in 4°C until being applied to the anti-fungal experiment.

2.1.2. Isolation of Fungal

Cross-sectional study was performed. Fungal clinicals were isolated from patients vaginas that were referred to the medicinal center using a sterile swab at the Amir Al-Momenin hospital, Zabol, south-eastern Iran during the years 2015 - 2016. They were examined at the Medical Science University, by a gynecologist and then quickly transferred to a sterile falcon tube comprising sterile water for further culture and including 2 solid culture medium: Sabouraud Dextrose Agar (Merck, Germany) was used for fungal culture and purification. One drop of fungi suspension was spread in a line across over the solid SDA medium in plates. All plates were transferred to an incubator at 37°C and then tested after 24 hours of incubation. Growth individual colonies were cultured again on the solid medium and fresh colonies were used for purification and identification. Each purified colony was identified according to the standard clue based on morphological criteria. Isolates were kept up for further studies in -20°C (9). To prepare a suspension of fungal spores, a piece of C. albicans cultured on Sabouraud Dextrose Agar medium were transferred to liquid physiologic serum and kept in 37°C. After fungi growth in the liquid medium, the condensation of fungal suspension was measured using a spectrophotometer (Unico, USA) in 530 μm wavelength. Based on the get light absorption, a suspension with a concentration of 106 cells/mL was adjusted.

The MIC (minimum inhibitory concentration) and MFC (minimum Fungistatic concentration) of the fungus were tested by using the dilution method.

The 96-cell microtitre plate was applied in this study. To this end, each broth of the plate was added 200 micro liters of Sabouraud Dextrose broth, 10 micro liters of suspension with concentration of 106 cells per micro liters, and different amounts of the extract (1, 5, 10, 15, 20, and 50 micro liters). The experiment was done 3 times. The 96-cell plate was kept in 37°C for 24 hours.

To measure MFC, 10 mL of each broth was removed by the sampler, was transferred to the plates including Sabouraud Dextrose Agar, and was incubated for 24 hours at 37°C. The highest concentration inhibiting the development of Candida albicans was considered as MFC (Fungistatic) (10, 11).

2.2. Statistical Analysis

The mean values of studied parameters were derived from the measurements of 3 replicates and the “Standard Error” of the means was calculated. One-way ANOVA was applied to define the importance of the results between different therapy and then Duncan multiple range tests (P < 0.05) were carried out. All the statistical analyses were done using the statistical package for social sciences (SPSS) for Windows (version 18.0)

3. Results

The results of this study showed that the lowest inhibitory concentration of ethanol extract of thyme against C. albicans was 25 ppm, and the 3 levels of the fungus were inhibited at this concentration, while the highest inhibitory concentration was 200 ppm. Maximum fungicidal concentration (MFC) against C. albicans is 400 ppm, with 2 strains lost in this concentration. The lowest inhibitory concentration of methanol extract of thyme against Candida fungus was 25 ppm, which a single strain was inhibited and the highest inhibitory concentration was 400 ppm, of which 2 strains were inhibited in this concentration. The lowest and highest inhibitory concentrations of thyme chloroform extract were 12.5 ppm and 100 ppm respectively, of which 2 and 4 strains were inhibited in these concentrations, while the maximum and minimum fungicidal concentration (MFC) was 25 ppm and 200 ppm. The lowest and highest inhibitory concentrations of thyme ethyl acetate extract were 6.25 ppm and 50 ppm, respectively, of which 2 and 3 strains were inhibited at these concentrations, while the maximum and minimum fungicidal concentration were 12.5 ppm and 100 ppm (Table 1).

Table 1. MIC Results of the Zataria multiflora Extract on Various Candida albicans Sample
Fungus SampleMIC EthanolMIC MethanolMIC ChloroformMIC Ethyl Acetat
125502512.5
21002005012.5
35010010025
420040012.512.5
5501005025
6255010050
7100200256.25
8255010050
91002005050
10501001006.25
1120040012.550
1225255050
Table 2. MFC Results of the Zataria multiflora Extract on Various Candida albicans Sample
Fungus SampleMFC EthanolMFC MethanolMFC ChloroformMFC Ethyl Acetat
1501005025
220040010025
310020020050
44004002525
510010010025
650100200100
72002005012.5
850100200100
9200400100100
1010020020012.5
114004002550
125050100200

The results of this study showed that the extract with different solvents inhibited the growth of the fungus, however, different solvents in different concentrations inhibited fungal growth so that the ethyl acetate extract had a better inhibitory effect.

4. Discussion

Candidate albicans can be mentioned as opportunistic microorganisms that today cause contamination of medical equipment and common infections of the hospital, especially in those who have been hospitalized for a long time. Due to its specific physiological characteristics, this fungus can cause severe and deadly infections with contaminating medical equipment, such as urinary catheterization and intra-renal cancers as well as artificial inhalation devices, especially in those who have been hospitalized for surgery or burns (12).

Candida infections should be treated due to the fact that they may be released in patients with neutropenic and immune deficiency. The treatment of such infections is a big challenge because the resistance of pathogens has risen to a number of medicine that are widely used (13).

In this study, the inhibitory effect of Zataria multiflora extract on clinical strains of Candida albicans has been investigated.

The results indicated that Zataria multiflora have a significant anti-fungal effect, which can be attributed to composers such as carvacrol and thymol (14, 15). The antifungal activities in the present search have been reported before by other researchers (16-18).

In Akbari’s study, the antifungal activity of thyme against Candida albicans isolated from susceptible and resistant to fluconazole was investigated and the results showed that thyme can prevent Candida albicans from growing in laboratory conditions (19).Based on the results of a study conducted by Zia et al., comparing the effect of thyme and morte extract with nystatin on inhibition of Candida albicans growth, thyme extract can be used in combination with nystatin as an antifungal agent for the treatment of candidiasis. In addition, according to this study, by reducing the concentration of thyme in the culture medium, the degree of observation of the colonies resulting from the expansion of the dilutions of the Candida albicans suspension increased. Therefore, by decreasing the number of yeast cells in suspension, or increasing the dilution of yeast suspension, the number of colonies grown in culture media decreased (20).

In addition, the results of the study by Esfandiary et al., indicated that Zataria multiflora has high antifungal activity, which is due to the presence of effective compounds of this medicinal plant (21).

The study of Sharif Rohani, In vitro MIC of Z. multiflora essential oil versus Candida albicans and Fusarium solani get 0.004% and 0.008%, respectively. In addition, MFC of Z. multiflora essential oil against C.albicans and F.solani was 0.004% and 0.04%, respectively. The results demonstrate that 0.0002% dosage of Z. multiflora essential oil versus total count of fungi in sea water (salinity 39 ± 1 ppt) can decrease the increase of fungi after 6 hours and 0.0004%, 0.0008%, and 0.0016% dosages can decrease the total count of fungi in sea water (22).

It was demonstrated that the main parts with phenolic structures in Z. multiflora, such as carvacrol and thymol, have high activity versus examine Candida species (23). In Iran, Fataneh (24) and Mahmoudabadi et al. (25) demonstrated anti-Candida activity of carvacrol and thymol in 2 in-vitro studies. In the present study, these compounds (carvacrol and thymol) were found as 2 main components, which was in agreement with published data (26-28).

In the study of Rahimifard, the results display that Zataria multiflora essential oil exhibited a significant activity versus fungi and its MIC on Candida albicans, Aspergillus niger, and Aspergillus flavus were respectively 0.125, 0.125, and 0.125 µg mL-1 (ppm) (29).

In the study of Moghim, the result show that the measured values of MIC, MIC50%, MIC90%, and MFC of Z. multiflora on the C. albicans were 0.13, 0.38, 0.74, and 1.03 mg/mL (30).

The study of Yaghooti Khorasani, was to contrast the in vitro inhibitory agents of Zataria multiflora Boiss essential oil, Chlorhexidin,e and Sodium hypochlorite on the growth of Enterococcus faecalis and Candida albicans. The result show that the inhibition zone of 1% Sodium hypochlorite versus Enterococcus faecalis was of greatest diameter pursue, respectively by 0.2% Chlorhexidine, 0.1% Chlorhexidine, and 100 mg/mL concentration of Zataria multiflora essential oil, while 50 mg/mL concentration of this essential oil had the least effect on this microorganism. A total of 100 mg/mL concentration of Zataria multiflora essential oil was maximum efficient and Candida albicans followed respectively by 50 mg/mL concentration of this essential oil, 1% Sodium hypochlorite, 0.2% Chlorhexidine, and 0.1% Chlorhexidine, which demonstrate the least efficacy (31).

4.1. Conclusion

The present study confirms the usefulness of this extract as an antifungal agent; however, further research is required to evaluate the practical value of this plant before proving its therapeutic applications.

Acknowledgements
Footnotes
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