Showing 32 results for Tot
Rasoulinejad M, Bouyer M, Emadi Kouchak H, Hasibi M, Mollazadeh N, Moradmand Badie B,
Volume 68, Issue 10 (1-2011)
Abstract
Background: Tuberculosis with high prevalence in HIV/AIDS
patients is the main reason for morbidity and mortality in these patients.
About one-third of patients with HIV infection
have concomitant tuberculosis. Lack of appropriate infection control on many
social and economic communities will impose. Comprehensive study on the effects
of anti-tuberculosis drugs in patients with HIV infecting
less done, also due to the importance of reducing morbidity and mortality,
reduce the cost of disease, identifying drug pharmacokinetics, the importance
of completing treatment tuberculosis, this study was performed to evaluate the
effects of anti- tuberculosis drugs on HIV infection
and to identify the drug pharmacokinetics and so more complete tuberculosis
treatment.
Methods: A historical cohort study was performed on
patients referring to the research center for HIV/AIDS,
consultation center, department of infection diseases of Imam
Khomeini Hospital
in Tehran, Iran. A
total number of 75 cases with HIV
negative versus HIV positive patients
with pulmonary tuberculosis and positive sputum smear in accordance with
inclusion and exclusion criteria were selected.
Results: In this study, the frequency of peripheral neuropathy 27(73%),
arthralgia 31(83.8%), vomiting 18(48.6%),
headache 26(70.3%), dizziness 20(54.1%),
renal toxicity 4(10.8%) and of skin rash 10(27%)
in patients with HIV virus infection were
significantly more than HIV- negative patients.
Hepatotoxicity, fever and anemia were not significantly more common in patients
who infected with HIV virus.
Conclusion: The HIV patients, who have not received antiretroviral
drugs during tuberculosis treatment, may show higher incidence of
anti-tuberculosis drugs complications.
Khosravi N, Aminian A, Taghipour R,
Volume 69, Issue 7 (10-2011)
Abstract
Background: Deposition of bilirubin in neurons causes permanent neuronal injury. Bilirubin exhibits an affinity for the phospholipids of plasma membrane like N-methyl-D-aspartate (NMDA) receptors. Magnesium is an NMDA antagonist and it acts against the neurotoxic effects of bilirubin. We compared pre- and post-phototherapy serum magnesium level of neonates with hyperbilirubinemia to find the best time of discharge and evaluate new management techniques such as magnesium supplementation.
Methods: In this semi-experimental study, we evaluated neonates admitted in Ali Asghar Children's Hospital in Tehran, Iran with signs of icter from 2009 to 2010. The inclusion criteria included age less than four weeks, no history of magnesium sulfate administration in the mother and absence of sepsis.
Results: From 106 patients with icter, 50.9% were male and 49.1% were female neonates. Their mean gestational age was 37.341.286 (33-41) weeks and the mean birth weight was 3172.12436.936 (2022-4300) grams. The frequency of underlying causes of hyperbillirubinemia included: ABO mismatch 9.34%, Rh incompatibility 4.7%, breastfeeding 16% and breast milk 44.3%. There was a significant difference (P≤0.001) between serum magnesium levels before (2.24mg/dl) and after phototherapy (2.12mg/dl). There were no significant differences between serum magnesium values in the two sexes (male=2.28, female=2.19), among different gestational age groups (<34 wks=2.35, 35-37 wks=2.27, >38 wks=2.17), between different birth weight groups (1500-2500 g=2.4 and >2500 g=2.23) or severity of hyperbilirubinemia (mild=2.23, moderate=2.21 and severe=2.29).
Conclusion: Phototherapy decreases the total magnesium concentration and magnesium administration will prevent bilirubin neurotoxicity in icteric neonates.
Fathi M, Mirshahi M, Garaati M,
Volume 69, Issue 9 (12-2011)
Abstract
Background: Human
cancer cell lines express human choriogonadotropin (hCG), its
subunits and derivatives, regardless of their origin and type. It appears that
hCG is a common phenotype in human cancer cell lines. In this research,
the effects of hCG targeting monoclonal
antibodies (7D9, T18H7 and T8B12) on
human cancer cell lines were evaluated.
Methods: Monoclonal
antibody secreting hybridomas were proliferated and injected intraperitoneally
to Balb/C mice after treatment with pristine. Two weeks later, ascites fluid
was collected. Purification of aforementioned antibodies from ascites fluid was
performed using G-protein affinity followed by
ion exchange chromatography. SDS-PAGE and ELISA
confirmed the structure and functional integrity of the purified antibodies,
respectively. Two human cancer cell lines "Hela" and "MDA"
were treated by the purified antibodies. Three days later, different wells were
imaged and the cells counted.
Results: SDS-PAGE gel
(None-reducing) indicated consistency of band migration patterns with control
antibodies. ELISA test using hCG
antigens indicated that the produced antibodies could detect hCG
antigens. Cell lines were cultured and treated with different concentrations of
each antibody. Counting and imaging different wells of treated plates,
indicated that 7D9 antibody had a more significant (P<0.01)
cytotoxic effect on cancer cell lines than the control cells.
Conclusion: HCG targeting monoclonal
antibodies can be used for targeted cancer therapy, as human cancer
cells express hCG gene. 7D9 antibody that exhibits protease activity is a
proper candidate for this purpose, as it possesses both antagonistic and
enzymatic properties.
Soltan Dallal Mm, Mokarrari S, Yazdi Mh, Paymaneh Abedi Mohtasab T, Shirazi L, Mahdavi M,
Volume 70, Issue 1 (4-2012)
Abstract
Background: Regarding the immunomodulatory effects of lactobacillus bacteria, this study aimed to evaluate the effect of oral administration of Lactobacillus reuteri, as probiotic bacteria, on natural killer cell cytotoxicity and tumor-specific lymphocyte proliferation in Balb/c mice with breast adenocarcinoma.
Methods: A total of 30 female mice, aged 6- 8 weeks and with a weight of approximately 17- 19 g, were randomly divided into two groups of 15 mice. The case group received Lactobacillus reuteri at a dose of 2.7× 108 bacteria in half a milliliter of sterile phosphate buffer saline (PBS) and the control group only received PBS. The probiotic group received the regimen for two weeks prior to tumor transplantation, as they did for 30 days after transplantation with three-day intervals and durations of seven days. For the evaluation of natural killer cell cytotoxicity and also tumor-specific lymphocyte proliferation response, LDH and BrdU assays were performed respectively according to the manufacturers' instructions.
Results: The study showed that the mice in the case group which were receiving Lactobacillus reuteri had statistically significant differences in the replication of tumor -specific lymphocytes, natural killer cell cytotoxicity and delayed hypersensitivity responses Compared to the mice in the control group.
Conclusion: Daily consumption of probiotics seems to regulate the immune system and consequently it can be helpful in people with cancer. Moreover, consumption of probiotics in healthy individuals can also boost the efficiency of the immune system against a variety of abnormalities.
Hassan Seirafi , Amirhooshang Ehsani , Mahbobeh Sadat Hosseini, Bahador Samavati , Fatemeh Gholamali , Pedram Noormohammadpour ,
Volume 71, Issue 4 (7-2013)
Abstract
Background: Alopecia areata (AA) is a common cause of noncicatricial alopecia that occurs as a patchy, confluent or diffuse pattern. Exact etiologic factor of AA not yet recognized. Among many hypothesis, relationship between AA and autoimmune disease, especially thyroid disorders, was more interesting. The objective of this study was to determine the prevalence of thyroid test disorders in the patients with alopecia totalis and universalis in comparison with normal population.
Methods: We analyzed medical records of 100 patients, including 44 male and 56 female in Tehran Razi Hospital from 1388 to 1389. The mean age was 24.1 years. Patients having totalis and universalis form of AA considered as case group while 100 normal person (42 male and 58 female with mean age of 26.1) who had not any form of AA considered as control group. Both groups had not any sign of thyroid disease at clinical examination according to their available medical records. Collected data were analyzed statistically in SPSS software 17th version.
Results: In the majority of patients (54%) the disease was manifested in the first two decades of life. History of atopia was seen in 9.8% of patient. Presence of the similar disease in first-degree family members was seen in 14.3% of patients. Abnormal T3, T4 and TSH were significantly higher in case group. Abnormal T3 uptake was higher in case group but not statistically significant.
Conclusion: Paraclinical thyroid disorders were significantly higher in the alopecia areata patients than in normal population. There was no significant association between the age, sex and duration of disease and presence thyroid dysfunction.
Amir Houshang Ehsani , Fatemeh Gholamali , Mahboubeh Sadat Hosseini , Nahid Hassanpour , Pedram Noormohammadpour ,
Volume 72, Issue 7 (10-2014)
Abstract
Background: Intense Pulsed Light (IPL) technology is one of our new measures in treating dermatologic disorders including undesirable skin pigmentation. In contrast with lentigines and freckling of the skin, few reports about nevus spilus treatment using intense pulsed light have been published. The aim of current study was to evaluate efficacy and safety of nevus spilus treatment with an intense pulsed light device (Palomar Max-G IPL).
Methods: Patients with diagnosed nevus spilus confirmed via histopathology, were treated by an intense pulsed light source using parameters according to the skin type and location of lesions in one to three consecutive treatment sessions at 14-21 day intervals for three month. Palomar Max-G ® IPL hand piece is optimized for pigmented skin lesions and we used no additional filter. After each session, Photographs were taken from lesions with 10 mega pixel camera. Two months after finishing the treatment, the effect was evaluated base on close-up photographs.
Results: Fourteen female patients were included. Significant improvement (76-100%) in one patient, good improvement (51-75%) in eight patients and fair to poor improvement (0-25%) in five patients were achieved. The commonest side effect of treatment was transient erythema resolved after six to eight hours. No permanent complication was reported. Younger patients and patients with shorter duration of lesion had better response to treatment however the differences were not statistically significant. Only one recurrence has been seen. No significant relationship between age, gender, anatomical site of lesions and skin type with response rate was found.
Conclusion: Intense pulsed light is seemed an effective and safe treatment for nevus spilus Treatment however randomized control trials with longer follow-up periods are required to evaluate the efficacy and safety.
Darush Goran Savadkohi , Babak Siavashi , Mojgan Seifi , Tayeb Ramim ,
Volume 72, Issue 10 (1-2015)
Abstract
Background: Short-stem prosthesis for total hip arthroplasty (THA) have been designed to overcome the weakness of standard-stem prostheses and improve surgical outcomes. The aim of this study was to compare short-stem with standard-stem prosthesis outcomes.
Methods: This study was performed as a randomized clinical trial. Subjects were selected among patients referred to Sina University Hospital, Tehran, Iran from April 2010 to 2012. THA were performed with short-stem or standard-stem prostheses after obtaining written informed consent from patients. Balanced block randomization method was used to get a random sample in each group. Clinical outcomes were evaluated based on Harris Hip Score (HHS). Patients were followed up for at least one year. All patients were examined at 2 weeks, 6 weeks, 3 months, 6 months and one year after surgery. In each visit, Control X-ray was obtained and bone and prosthetic position were assessed. Also, the symptoms such as infection, pain, claudication, ability to climb stairs, using crutches and weight bearing were rechecked. Student t-test was used to compare outcomes in the two groups.
Results: A total of eighty four THA were studied. 13 patients were lost to follow-up or had infection and failure. One patient died with the prosthesis in situ from causes not related to the surgery. Therefore, a total of 70 patients were analyzed. Of these, 34 and 36 hips underwent small stem and standard stem THA, respectively. The mean age of the patients at the time of operation was 61.1±8.68 years (range, 48-86 years). Most common reasons for arthroplasty were osteoarthritis, avascular necrosis and dysplasia of hip. There were significant differences between the two study groups in bleeding during surgery (P=0.001). There were no significant differences among the study groups in HHS except for 6th week and 3th month (P=0.000).
Conclusion: The use of short-stem prosthesis can improve the performance of patients in short-term but no significant difference with standard-stem prosthesis in long- term.
Mohammad Ali Rashmezad , Elahe Ali Asgary, Farzaneh Tafvizi , Seyed Ataollah Sadat Shandiz, Amir Mirzaie ,
Volume 72, Issue 12 (3-2015)
Abstract
Background: Biosynthesis of nanoparticles has attracted the attention of the scientific community in nanotechnology and biotechnology due to their extensive application in the area of material sciences and medicine. Nowadays, despite a various application of nanomaterial’s, there is a little information about their impact on human health. In this study, we investigated the comparative study on cytotoxicity effect of biological and commercial synthesized nanosilver on human gastric carcinoma (AGS) and normal lung fibroblast (MRC-5) cell lines.
Methods: The current experimental study was carried out in Islamic Azad University, East Tehran Branch, from April to November 2014. The biological synthesis of nanosilver was obtained from Eucalyptus plant extract as a reducing agent. Further to more analysis, morphological study on size and shape of developed biological nanosilver was characterized by performing scanning electron microscopy and dynamic light scattering. AGS and MCR-5 cell lines were treated with various concentration of nanosilver for 24, 48 and 72 hours. Finally, the cell viability was evaluated by using MTT assay.
Results: The results show that the nanosilver exerts a dose-dependent inhibitory effect on viability of cells. At 100µg/mL of commercial and biological synthesized nanosilver, the viability of AGS was reduced to 7.47±0.002% (P=0.002) and 3.65±0.01% (P=0.003) after 72 hours, respectively. In addition, the viability of MRC-5 at the same condition was reduced to 10.27±0.19% (P=0.001) and 9.16±1.53% (P=0.002), respectively.
Conclusion: Based on a thorough literature surveys, the present study is the first research about biosynthesis of nanosilver using Eucalyptus plant extract. This eco-friendly and cost effective method can be used for large scale production of silver nanoparticle. In addition, based on the current obtained data, commercial and biological synthesized nanosilver can more inhibitory effect on cancer cells compared to the normal cells. Hence, silver nanoparticles might be used as a new strategy for treating many human cancers. However, further studies are necessary to ascertain their potential as anticancer agents.
Amir Mirzaie , Seyed Ataollah Sadat Shandiz, Hassan Noorbazargan , Elahe Ali Asgary,
Volume 74, Issue 3 (6-2016)
Abstract
Background: Aloysia citrodora belongs to the Verbenaceae family of plants, a well-known herbal medicine in Iran. The aim of the present study was to investigate the chemical composition, antioxidant, antibacterial, cytotoxic and apoptotic effect of A. citrodora extract against human colon cancer (HT29) cells by using real-time polymerase chain reaction and flow-cytometry methods.
Methods: This experimental study was carried out in Islamic Azad University, East Tehran Branch, from March to September of 2014. At first, the A. citrodora chemical constituents were analyzed by gas chromatography-mass spectrometry (GC-MS) technique. In addition, antioxidant assay, antibacterial and anti-cancer effect was performed using 1,1-diphenyl-2-picrylhydrazyl (DPPH), disk diffusion and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) methods, respectively. The half maximal inhibitory concentration (IC50) value was calculated. We extracted total RNA molecules by using RNX solution, after which cDNA was synthesized. Finally, the pro-apoptotic (Bax) and anti-apoptotic (Bcl2) gene expression was performed by real-time polymerase chain reaction and apoptotic effects were analyzed using Flow-cytometry method.
Results: GC-MS analysis of Aloysia citrodora extract was shown 37 major components and the most frequent component was belonged to Spathulenol (17.57%) and Caryophyllene oxide (15.15%) The antioxidant activity of the extract was IC50= 0.6±0.03 mg/ml. The maximum and minimum antibacterial effects of extract were belonged to gram-negative and gram-positive bacteria, respectively. Cytotoxic results revealed that the A.citrodora extract have IC50= 20.1±0.78 mg/ml against colon cancer (HT29) cell line and real-time polymerase chain reaction results showed the expression level of Bax and Bcl2 was increased and decreased respectively in colon cancer cell line (3.470±0.72 (P< 0.05), 0.43±0.35 (P< 0.05)). In addition, the flow-cytometry results indicated the 38.66% apoptosis in colon cancer cell line.
Conclusion: According to the results, it seems that A. citrodora extract has potential antioxidant, antibacterial and anticancer effects and it suggested that further studies were performed for A. citrodora pharmaceutical importance.
Farid Abassi , Mandana Sattari , Noushin Jalayer Naderi, Marzie Sorooshzadeh ,
Volume 74, Issue 5 (8-2016)
Abstract
Background: Hydroxyapatite nanoparticles have a more surface contact and solubility than conventional hydroxyapatite. Hydroxynanoparticles enhances the biological and mechanical properties of new regenerated tissues. The hydroxyapatite nanoparticles have received attention as a new and effective osseous graft for using as scaffolds in bone regeneration. The reports on hydroxyapatite nanoparticles biocompatibility are controversial. It has been shown that hydroxyapatite nanoparticles induces inflammatory reaction and apoptosis. The aim of the present study was to evaluate the cytotoxicity of nano-hydroxyapatite on the human epithelial cells.
Methods: The study was experimental and completed in vitro. The study was carried out in department of Immonulogy, Faculty of Medicine, Shahid Beheshti University of Medical Sciences in November 2014. The human-derived oral epithelium cell line (KB) obtained from Pasteur Institute, Tehran, Iran were exposed to hydroxyapatite nanoparticles at 0.01, 0.05, 0.1, 0.5, 0.75, 1, 2.5 and 5 mg/ml concentrations in 24, 48 and 72 hours. Rod-shaped hydroxyapatite nanoparticles with 99% purity and maximum 100 nm sized particles were used. Methylthiazol tetrazolium bromide (MTT) method was employed for cell vitality evaluation. Enzyme-linked immunosorbent assay (ELISA) was used for assessing the viability of cells. Distilled water and fetal bovine serum (FBS) were positive and negative controls. ANOVA and Duncan tests were used for statistical analysis.
Results: The cytotoxicity of different concentrations of hydroxyapatite nanoparticles on human-derived oral epithelium cell line in 24 (P< 0.001), 48 (P< 0.001) and 72 hours (P< 0.001) was significantly different. The nano-hydroxyapatite particles at 0.5 to 1 mg/ml had the highest cytotoxicity effect on human-derived oral epithelium cells in 24, 48 and 72 hours. Lower concentrations than 0.05 mg/ml had the best biocompatibility properties in 24, 48 and 72 hours.
Conclusion: Hydroxyapatite nanoparticles had a good biocompatibility. The biocompatibility of hydroxyapatite nanoparticles were dose and time dependent. The lower concentrations than 0.05 mg/ml of nano-hydroxyapatite had the best biocompatibility over time.
Amir Mirzaie , Aliasghar Bagheri Kashtali , Hassan Sahebjamee , Hassan Noorbazargan , Hassan Rahmati , Seyed Ataollah Sadat Shandiz,
Volume 75, Issue 5 (8-2017)
Abstract
Background: Medicinal plants have been identified and used from prehistoric times and these plants make many chemical compounds for biological functions. Trifolium cherleri is an herbaceous species belonging to the family of the Fabaceae to Africa, Eurasia and Australia. T. cherleri is an important member of the Fabaceae family that is well-known herbal medicine in Iran. The aim of this study was to investigate the phytochemical composition, antibacterial and anti-cancer activities of T. cherleri extract.
Methods: This experimental study was performed in Islamic Azad University, from December 2016 to February 2017. At first, the phytochemical constituents of T. cherleri extract were determined using gas chromatography-mass spectrometry (GC-MS) method. Subsequently, the antibacterial activity of the extract was evaluated against some gram positive and negative pathogenic bacteria included Staphylococcus aureus ATCC 25923, Streptococcus pyogenes ATCC 19615, Salmonella enteritidis ATCC 13076 and Listeria monocytogenes ATCC 35152 via minimum inhibitory concentration (MIC) method. Moreover, anticancer potential of extract was examined by colorimetric MTT assay toward lung cancer (A549) cell line. Then, the evaluation of caspase 3 and 9 apoptosis gene expression was determined using Real-Time Polymerase Chain Reaction (Real-Time PCR) technique. Moreover, the Real-Time PCR was performed using relative quantitative method.
| Results: The phytochemical analyses of T. cherleri extract showed the 20 major components and the most frequent component was belonged to hexadecanoic acid, ethyl ester (20.7%) and 2-Pentadecanone, 6,10,14-trimethyl (19.9%). The extract had maximum antibacterial effects against Staphylococcus aureus and Streptococcus pyogenes. There was a dose dependent increase in the cytotoxicity effect of extract against A549 cancer cell. Moreover, the Real-Time PCR results indicated that the caspase 3 and caspase 9 gene expression was significantly up-regulated 2.57±0.27 (P<0.05), and 3.3±0.46 (P<0.05), respectively. |
Conclusion: The results of this study showed that the T. cherleri extract had significant anti-bacterial and anti-cancer effects and it appear that the extract has potential uses for pharmaceutical industries. Moreover, it could be considered as a promising source for novel drug compounds, but more studies are needed.
Roya Taheritafti, Moj Taheritafti ,
Volume 76, Issue 10 (1-2019)
Abstract
Background: Phototherapy is the most effective treatment for neonatal jaundice and intermittent phototherapy is as effective as continuous phototherapy but with fewer complications and more benefits. This study compared the hospital length of stay, duration of phototherapy and the reducing rate of total serum bilirubin after 24 and 36 hours of phototherapy in two groups.
Methods: The current double-blinded randomized controlled trial was conducted on 60 icteric term neonates from November 2016 to June 2017. A total of 60 icteric term neonates were randomly divided into two groups. In the continuous group, the phototherapy device was turned on for 24 hours and in the intermittent phototherapy group, the phototherapy device was turned on for 18 hours and off for eight hours. Inclusion criteria were term neonates with non-hemolytic hyperbilirubinemia admitted to the neonatal ward of Loghman Hospital, Tehran, Iran. Infants were excluded for any of the following reasons: Hemolytic anemia, prematurity, sepsis, sever hyperbilirubinemia (total bilirubin>18 mg/dl), direct hyperbilirubinemia and onset of jaundice within the first 24 hours of life. In both arms, phototherapy continued until total serum bilirubin reached<11 mg/dL.
Both early and late complications were compared including the length of hospital stay, duration of phototherapy, the rate of kernicterus, decreasing rate of serum bilirubin after 24 and 36 hours.
Results: The demographic parameters did not differ significantly between the intermittent and continuous phototherapy groups. The length of hospital stay was 2.3±0.60 and 2.46±0.93 days in the continuous and intermittent groups, respectively (P=0.516) and there was not significant differences between them. The duration of phototherapy was 45.26±16.39 and 46±11.82 hours in the continuous and intermittent groups, respectively, and they had no significant differences (P=0.843). The rate of serum bilirubin cessation in the two groups was similar after 36 hours.
Conclusion: According to the current study results, intermittent phototherapy was as effective as continuous phototherapy to treat icteric full-term neonates. The intermittent phototherapy also helps to maintain mother-infant bonding and it is useful to maintain breastfeeding.
Rahimeh Moosavi , Parvaneh Nazarali , Fahimeh Kazemi ,
Volume 77, Issue 11 (2-2020)
Abstract
Background: TRX training is a new training method that has beneficial effects on improving balance and strength. However, the role of these types of training on the factors associated with function and mitochondrial biogenesis is not understood. Therefore, the purpose of present study was to determine the effect of eight weeks of TRX training on serum levels of Peroxisome proliferator-activated receptor-γ coactivator 1α (PGC-1α) and citrate synthase in overweight women.
Methods: All subjects gave written informed consent after a detailed description of the study procedures. The protocol of this study was approved by the Research Ethics Committee of Sport Sciences Research Institute (SSRI) in Iran. The present study was experimental and was conducted in Shahid Ghaffari women's club in Tehran under the supervision of Alzahra University from May 2018 to January 2019. For this purpose, 30 overweight women after primary alignment on basis of body mass index (25-30 kg/m2) were divided into two groups: control (n=14) and TRX training (n=16). The TRX training protocol was performed for eight weeks and 3 sessions per week, which included 6 main movements (squat, rear deltoid row, biceps curl, chest press, low row, rotational ward) that lasted 60 minutes per session. According to consideration the physical condition of each person, the subjects were free to modulate the exercise intensity by changing the body inclinations. Each exercise provided 4 sets of 12 repetitions separated by one-minute rest. Blood sampling was performed in two stages of pre-test and 48 hours after the last session of the exercise in overnight fasting state. After collection of serum samples, enzyme-linked immunosorbent assay (ELISA) method was used to measure serum levels of PGC-1α and citrate synthase.
Results: The results showed that TRX training caused no significant change in the body weight and body mass index compared to the control group. In addition, TRX training increased significantly the serum levels of PGC-1α and citrate synthase compared to the pre-test and the control group.
Conclusion: The findings of the present study indicated that eight weeks of TRX training could increase serum levels of PGC-1α and citrate synthase in overweight women.
Mohammad Saber Malaki , Leila Rouhi, Khalil Khashei Varnamkhasti ,
Volume 78, Issue 10 (1-2021)
Abstract
Background: Even after surgery, as the most effective treatment for colorectal cancer, about 30-40% of cases are recurring. Since growth inhibition is an important strategy in cancer treatment, many attempts are in the program to find new agents, so in this study, the cytotoxic and antimicrobial effects of Lactobacillus sakei on colon cancer cell line (HT-29) and some pathogenic microorganisms have been evaluated. Lactobacillus sakei is a probiotic that, when consumed affects the intestinal flora, causes beneficial effects on host health. Probiotics due to their anti-cancer effects, modulation of the differentiation process in tumor cells, changes in tumor gene expression and lack of immunological responses have attracted a lot of attention as a new and effective treatment for colorectal adenocarcinoma.
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Methods: In the present study, which was conducted experimentally from May to September 2018 in bacteriology and Cellular and Developmental Research Centers of Islamic Azad University, Shahrekord branch, the antimicrobial activity of supernatant of Lactobacillus sakei was assessed by Well Diffusion Agar (WDA) method against some pathogenic bacteria. HT-29 Colorectal adenocarcinoma cancer cells were cultured in DMEM medium with 10% bovine serum. The cells were treated in 5, 15, 10 and 20 mg/ml concentrations of sakei metabolites and incubated at 24, 48 and 72 hours. Cell growth was analyzed by celltiter 96® aqueous one solution cell proliferation assay kit to the manufacturer's protocol in all three incubation times.
Results: The results of this study indicate that sakei was able to produce antimicrobial metabolites against pathogenic bacteria. Besides, the results of the celltiter 96® aqueous one solution cell proliferation assay showed that the bioavailability of HT-29 cell lines decreased at all concentrations of sakei metabolites in a dose and time-dependent manner.
Conclusion: Since lactic acid probiotic bacteria can alter the metabolic activities of the intestinal microflora, attach to carcinogens and destroy them, prevent carcinogenesis such as ammonia and secondary bile acids, producing anti-cancer substances and creating an acidic state to inhibit the growth and proliferation of carcinogenic bacteria, It seems that there is a good research field for the use of bioactive compounds produced by Lactobacillus sakei in the control of bacterial pathogens and treatment of human colorectal adenocarcinoma (HT-29).
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