Effect of chitosan coating on drug carrier capacity of metal organic framework MIL-100(Fe) contained cyclophosphamide.

BACKGROUND: In recent years, the field of biomedical engineering, particularly drug delivery, has seen significant advancements in the evaluation of various drug carriers. Metal-organic frameworks (MOFs), are porous materials with strong coordination bonds. They have emerged as a promising tool for enhancing the effectiveness of drug delivery. OBJECTIVE: In this investigation, the effect of chitosan coating on cyclophosphamide loading of MIL-100(Fe) was studied in computational and experimental way. METHODS: The chitosan-coated MIL-100(Fe) containing cyclophosphamide (MIL-100(Fe)/CS/CP) was characterized by SEM, FTIR, BET, DLS, and powder X-ray diffraction analysis. The drug loading and release process were quantified using UV-spectroscopy. In vivo-In vitro study was performed. RESULTS: The result of drug loading in chitosan-coated MIL-100(Fe) with a drug payload of 32% revealed a significant increase compared with the MIL-100(Fe) with a 26.41% payload. According to the DLS analysis the existence of chitosan increase MIL-100(Fe) particle size (381 to 463nm) and change the zeta potential from 18 to -17mV. The toxic effect of MIL-100(Fe)/CS/CP was determined on human breast cancer (MCF-7) cells. In vivo images and H&E analysis shows inhibition properties of MIL-100(Fe)/CS/CP on tumor cells. The amount of drug loading of MIL-100(Fe) particles and MIL-100(Fe)/CS was simulated using molecular dynamic software LAAMPS. CONCLUSION: MIL-100(Fe) was synthesized biofriendly at room pressure and temperature with an Iron (II) chloride source coated with chitosan (CS) a natural polysaccharide. Incorporating MIL-100(Fe) with this natural polymer enhanced the drug loading capacity of MIL-100(Fe) and controlled drug release.

Investigating the anti-inflammatory effects of high molecular weight secretions from Limosilactobacillus reuteri PTCC 1655 on LPS-stimulated PMA-differentiated THP-1 cells.

AIMS: This study was done to investigate the anti-inflammatory effects of high molecular weight secretions from Limosilactobacillus reuteri PTCC 1655 probiotic bacteria on lipopolysaccharide (LPS)-stimulated phorbol 12-myristate 13-acetate (PMA)-differentiated THP-1 cells. METHODS AND RESULTS: After culturing the bacterium, the crude cell-free supernatant was fractionated on the basis of molecular weights using ultrafiltration. Also, a heat-killed and sonicated fraction was obtained from the biomass of the bacterial culture. All fractions were used to measure their anti-inflammatory effects on PMA-differentiated THP-1 cells following LPS stimulation by quantifying various cellular markers of inflammation. The results demonstrated that various L. reuteri PTCC 1655-derived fractions, especially the >100 kDa supernatant fraction decreased some of the inflammatory cytokines and mediators, including tumour necrosis factor-α, interleukin-1, nitric oxide, cyclooxygenase-2, matrix metalloproteinase-9 and interleukin-6, which are critical for the pathogenesis of some inflammatory diseases. CONCLUSION: It is concluded that the L. reuteri PTCC 1655-derived high molecular weight fractions significantly reduce inflammation and therefore could be appropriate candidates for future medical studies. SIGNIFICANCE AND IMPACT OF THE STUDY: Providing new insights about the significance of L. reuteri PTCC 1655-derived extracts and their potential to modulate inflammation.

Effects of supplementation with a phytobiotics-rich herbal mixture on performance, udder health, and metabolic status of Holstein cows with various levels of milk somatic cell counts.

This study evaluated the effects of dietary supplementation of a novel phytobiotics-rich herbal mixture (PRHM) on feed intake, performance, udder health, ruminal fermentation, and plasma metabolites in cows with moderate or high somatic cell counts (SCC) in the milk. Twenty-four Holstein dairy cows (117 ± 26 d in milk and 46.3 ± 4.7 kg of milk/d at the start of the experiment) were blocked by parity and days in milk and split into 2 groups, based on SCC in the milk; 12 cows were with moderate SCC (260,000500,000 cells/mL) in the milk. Within each SCC group, cows were blocked by milk yield and parity, and were randomly assigned to 2 different feeding regimens. Half of the cows in each SCC group (n=6) were supplemented with PRHM (185 g/cow per day, providing 12.4 g of phenolic compounds per day), and the other half (n=6) were not supplemented in their diets. The experiment lasted 36 d, whereby the first 24 d were used for adaptation to the diets and the last 12 d for sampling. Data showed that supplementation of PRHM decreased somatic cell score in the milk, indicating improved udder health of cows with high initial SCC, but not in cows with moderate SCC. Also, cows supplemented with PRHM consumed more feed DM, produced greater amounts of milk, and showed an improvement of feed utilization efficiency. However, these cows also lost more back-fat thickness during the experiment. Supplementation of PRHM increased fat- and energy-corrected milk yields in cows with high initial SCC, but not in cows with moderate SCC. Supplementation of PRHM decreased milk fat content, whereas other milk components were not affected by PRHM feeding. The PRHM supplementation decreased the acetate-to-propionate ratio in the rumen fluid, but increased ß-hydroxybutyrate and cholesterol concentration in the plasma, irrespective of the initial SCC level in the milk. Other plasma metabolites and liver enzymes were not affected by PRHM supplementation. Apparent nutrient digestibility did not differ among treatments. Overall, supplementation of PRHM seems to be an effective strategy to enhance performance and lower SCC, particularly in cows having high SCC levels in the milk. Further research is warranted to evaluate long-term effects of PRHM supplementation, especially with regard to metabolic health status and reproduction.

Vinyl chloride removal from an air stream by biotrickling filter.

A biofiltration process was used for degradation of vinyl chloride as a hazardous material in the air stream. Three biotrickling filters in series-parallel allowing uniform feed and moisture distribution all over the bed were used. Granular activated carbon mixed with compost was employed as carrier bed. The biological culture consisted of mixture of activated sludge from PVC wastewater treatment plant. Concurrent flow of gas and liquid was used in the bed. Results indicated that during the operation period of 110 days, the biotrickling bed was able to remove over 35% of inlet vinyl chloride. Maximum elimination capacity was calculated to be 0.56 g.m(-3).hr(-1). The amount of chlorine accumulated in the circulating liquid due to the degradation of vinyl chloride was measured to be equal to the vinyl chloride removed from the air stream.

Living with breast cancer: Iranian women's lived experiences.

BACKGROUND: Breast cancer is the most common form of cancer among women. Women with breast cancer encounter many psychosocial stresses as well as physical problems. AIM: To capture the meaning of living with breast cancer from the unique perspective and through the lived experiences of Iranian women with breast cancer that were explained with their own words. METHODS: A phenomenological approach was used to explore the meaning of living with breast cancer for Iranian women. The patients' feelings and lived experiences with breast cancer were investigated using semi-structured interviews with probing questions with 13 women between 34 and 67 years old. FINDINGS: The participants explained their experiences of living with breast cancer as losing something important, lack of confidence, living with fear, emotional dizziness and the need to be supported with the negative aspects of breast cancer and helped to explore new aspects of life as positive aspects of this event. CONCLUSION AND IMPLICATIONS: Understanding the phenomenon of 'living with breast cancer' seems to be crucial for nurses to help women with breast cancer to find themselves in confronting the consequences of the changes associated with the illness.

Trucut biopsy of breast lesions: the first step toward international standards in developing countries.

UNLABELLED: The new concept in breast cancer diagnosis and treatment is based on a less invasive, more accurate and effective strategy, with a multidisciplinary approach in a specialised breast unit. When indicated, conservative surgery has replaced mastectomy with sentinel-node biopsy substituting routine axillary dissection. But the key factor in respect of these new standards is to confirm the cancer before going to the operating room. Trucut biopsy is performed instead of incisional or excisional biopsy and frozen section. The technique is reliable, simple, and reproducible, and not at all expensive; it can be adapted even for low-income developing countries. MATERIALS AND METHODS: Between March 2006 and June 2010, 764 patients under clinical suspicion of cancer and/or with BIRADS (Breast Imaging Reporting and Data System) III-V in imaging in one university and one private hospital in Tehran, Iran underwent trucut biopsy (60% palpable and 40% non-palpable lesions). Cancer was found in 30.8% of the cases. In benign pathology, in concordance with clinical and imaging suspicion, surgery was omitted with short-term follow-up. For palpable symptomatic benign lesions surgery was performed to relieve the patient's symptoms. When the pathology report was not in concordance with clinical/imaging suspicion (1.8%), and in the presence of moderate and severe hyperplasia with or without atypia, in lobular and papillary lesions (4.9%) open biopsy was done to rule out cancer (10 added cancers, 1.3%; total cancers 32.1%). Cancer surgery was done as a single procedure in 89.8% of cases. CONCLUSION: Trucut biopsy for breast lesion assessment is the first step toward a new concept in breast cancer care. It is simple, reduces the number of surgeries (no surgery for non-symptomatic benign lesions and one surgery for cancer), and avoids diagnostic errors with full respect for the patient's rights. We insist on its routine use to extend international guidelines while decreasing the total cost of this common disease in all low-resource countries.

Chronic recurrent multifocal osteomyelitis: a case report.

Chronic recurrent multifocal osteomyelitis (CRMO) is a rare inflammatory bone disease. It is a diagnosis of exclusion based on the clinical, radiological and pathological criteria. The awareness of the corresponding feature can help avoid of unnecessary diagnostic procedures and prolonged antibiotic therapy. We present a case of 4.5 year old girl, diagnosed with CRMO who were followed for 6 months as a case of chronic bacterial osteomyelitis and received long course of antibiotic therapy.

Prevalence of pituitary incidentaloma in the Iranian cadavers.

AIM: Although one-fourth of the pituitary tumors are inactive and silent, increased total volume of the pituitary gland exerts pressure on sella turcica and corrodes the clinoid processes, resulting in several problems. Therefore, determination of the prevalence of the concealed pituitary tumors is of major concern among clinical practitioners. This study was performed to determine the prevalence of these tumors in cadavers referred to the Iranian Legal Medicine Organization (Kahrizak, Tehran). MATERIALS AND METHODS: This cross-sectional descriptive study was performed between June 2007 and February 2008. A total of 485 cadavers were selected by simple random sampling method. Pituitary glands were removed and then horizontally cut and four slides were prepared from each of them, stained by hematoxylin and eosin, and evaluated by a light microscope. For statistical analysis, SPSS software (version 16), Mann-Whitney U test, Kolmogorov-Smirnov nonparametric test (K-S test), and Chi-square test were used. RESULTS: Of the 485 investigated cadavers, 365 (75.3%) were males with an average age of 42 ± 20.5 years and 120 (24.7%) were females with an average age of 44 ± 22 years. A total of 61 (12.6%) had concealed pituitary masses. No statistically significant difference was found between the mean age, sex, and body mass index (BMI) of the cadavers with and without concealed tumors (P=0.380 P=0.450, and P=0.884, respectively). CONCLUSIONS: In the present study, the prevalence of the concealed pituitary adenomas was 12.6%. There was no correlation between age, sex, and BMI and the prevalence of the concealed masses.

Antigenic variations of human influenza virus in Shiraz, Iran.

PURPOSE: Influenza virus is a major cause of human respiratory infections and responsible for pandemics and regional outbreaks around the world. This investigation aims to determine the prevalent influenza genotypes during 2005-2007 outbreaks in Shiraz, the capital city of Fars province, southern Iran and compare the results obtained with those of previous study. MATERIALS AND METHOD: Of the 300 pharyngeal swabs collected from influenza patients, 26 were found to be positive by culture and hemagglutination (HA) assays. Typing and subtyping of the isolates carried out by using multiplex RT-PCR and phylogenetic analysis performed on isolated HA genes using neighbour-joining method. RESULT: Out of 26 positive isolates 12 and 14 were H1N1 and H3N2 respectively. The phylogenetic and amino acid sequence analyses of our H1N1 isolates showed 99-100% genetic resemblance to A/NewCaledonia/20/99 (H1N1) vaccine strain. Most of the Iranian H3N2 isolates varied form A/California/7/2004 vaccine strain in 20 amino acids of which positions 189,226 and 227 were located in antigenic sites of HA1 molecule. These substitutions were not observed in any of the H3N2 subtypes from the same region reported previously. CONCLUSION: The H3N2 subtype strains prevalent during the 2005/7 influenza outbreak in southern Iran demonstrated a drastic antigenic variation and differed from A/California/7/2004 vaccine strain. The H1N1 subtypes showed a notable resemblance to A/NewCaledonia/20/99 vaccine strain and therefore were predicted to be capable of conferring sufficient immunity against H1N1 subtypes.

Assessment of the consensus about tonsillectomy and/or adenoidectomy among pediatricians and otolaryngologists.

BACKGROUND: Several recent publications have shown that the current indications for tonsillectomy and/or adenoidectomy (T&A) in children vary considerably between and even within countries. The objective of our study is to present statistically valid information to surgeons and pediatricians, primary care physicians, and family physicians as key referral channels to the operation, whether there is consensus between pediatricians and otolaryngologists regarding the appropriateness of T&A. METHODS: Six academic pediatricians and six otolaryngologists participated in the study. After otolaryngologists visited 200 patients, the cases were referred to a pediatrician who also visited the patients independently on the same day pre-operatively. They ranked the appropriateness of T&A on a numerical Likert scale from 0 (never indicated) to 9 (always indicated) in a questionnaire. RESULTS: Overall, 200 (102 boys and 98 girls) children with a mean age of 6.1+/-5.6 were enrolled in this study. Otolaryngologists and Pediatricians had agreed about the history of tonsillitis attacks in the previous 6 months and previous year. The patients provided them with the same history. The agreement between otolaryngologists and pediatrician's views about T&A was poor. CONCLUSIONS: This study can serve as an initial warning in developing a national community-based working group to prepare a transparent local guideline regarding T&A indications. More attention should focused the role of pediatricians, primary care physicians, and family physicians for more follow up and determining which patients will eventually need T&A.

Assessment of gynecologic malignancies: a multi-center study in Tehran (1995-2005).

OBJECTIVE: The observed differences in cancer incidence are mainly due to different individuals and social risk factors. This study aims to demonstrate the characteristics of female genital malignancies according to the pathological records in Tehran, Iran. MATERIALS AND METHODS: In this cross-sectional study, all records of pathological specimens categorized as ovarian, uterine corpus or uterine cervix cancers from 1995 to 2005, in five teaching hospitals in Tehran, were studied. Age, marriage, parity, menopausal status, smoking, oral contraceptive usage, pathological staging, and histological grading were reviewed by a trained general practitioner. SPSS 14 was used for statistical analysis. RESULT: Mean age (SD) at the time of diagnosis was 50 (15). Fifty-nine percent of ovarian, 33.9 and 47.7% of uterine corpus and uterine cervix malignant patients were premenopausal. About 90% of all were nonsmokers and 82.7% were multiparae. Various types of gynecologic malignancies included ovarian (55.5%), uterine corpus (24.9%), and uterine cervical cancers (19.6%) were diagnosed. In tumors of the uterine corpus and uterus cervix, the most frequent stage of diagnosis was stage IIA. CONCLUSION: Ovarian cancer was the most frequently occurring gynecologic tumor. Although distribution of age in ovarian cancer was similar to that mentioned in the literature, occurrence of the cancer was more frequent in the premenopausal state.

Effects of treated and untreated bran in dough dynamic rheology.

Grains of the wheat variety Tajan were milled into straight-run flour and bran. Proximate analysis, farinograph experiments and rheological characteristics were conducted. Two types of bran (hydrothermal treated and untreated) at three levels (0%, 5%, 10%) were added to the parent flour. Proximate analysis and farinograph experiments of these flours were conducted. The effects of adding treated and untreated bran in linear (strain=0.1%) and non-linear limits (strain=1%, 5%, 10%) have been determined by dynamic oscillatory tests. Results show that, in the linear limit, the G' value for the untreated bran sample is very close to parent flour while the G' value of treated bran flour is lower than that of parent flour. The same changes occur in G'' values. In the non-linear limit, the G' values for both treated and untreated bran samples were higher than parent flour while the G'' value for untreated bran samples had no significant difference from the parent flour. Tge loss tangent for untreated bran flour in the non-linear limit was higher than that of the parent flour, while for treated bran flour it is lower than parent flour. It can be concluded that untreated bran weakens the gluten matrix. On the other hand, adding treated bran, to some extent, strengthens the protein matrix.

Incidence and risk factors of retinopathy of prematurity in a tertiary eye hospital in Tehran.

AIM: To determine the incidence and risk factors of retinopathy of prematurity (ROP) in premature infants referred to a tertiary eye hospital during 2003-7 to provide preliminary evidence about ROP in Iran. METHODS: In a cross-sectional study, data for premature infants screened for ROP in Farabi Eye Hospital including possible risk factors and eye exams' results were recorded and analysed using chi(2), univariate and multiple regressions. Severe ROP was defined as ROP needing treatment or stage 4 or 5 of ROP. RESULTS: Among 953 premature infants, there were 329 (34.5%) different stages of ROP. Severe ROP was seen in 22.6% (215/953) of infants (16.5%: treatable, 6.1%: advanced untreatable). The mean gestational age (GA) and birth weight (BW) of infants with severe ROP were 28.8 (SD 2.4) weeks and 1256 (389) g respectively. Univariate analysis showed a significant relation between GA, BW, oxygen therapy, blood transfusion and ROP (p<0.001), while multiple-regression methods showed GA, BW and oxygen therapy as independent predictors of ROP (p<0.001, 0.019 and 0.033, respectively). CONCLUSION: The authors observed a relatively high incidence of ROP in this series, especially its severe form affecting relatively more mature infants, which merits further investigation. GA, BW and oxygen therapy were independent ROP determinants.

Epidemiology of tuberculosis among Afghan immigrants in Fars province, southern Islamic Republic of Iran.

Rates of tuberculosis are high among migrants from high-incidence countries. This study determined the epidemiology of tuberculosis among Afghan immigrants in Fars province, southern Islamic Republic of Iran. From April 2000 to April 2002, all records were examined for new tuberculosis patients of Afghan origin registered at Shiraz University of Medical Sciences. A total of 371 patients (208 males, 163 females) were found: 74.9% pulmonary and 25.1% extrapulmonary cases. Of the 278 new cases of pulmonary tuberculosis, 157 (56.5%) were sputum smear-positive and 121 (43.5%) were sputum smear-negative. The incidence of tuberculosis per 100 000 Afghan population in Fars province was estimated at 96.2, 88.2 and 63.5 in 2000, 2001 and 2002 respectively.

Epidemiology of tuberculosis among Afghan immigrants in Fars province, southern Islamic Republic of Iran

Rates of tuberculosis are high among migrants from high-incidence countries. This study determined the epidemiology of tuberculosis among Afghan immigrants in Fars province, southern Islamic Republic of Iran. From April 2000 to April 2002, all records were examined for new tuberculosis patients of Afghan origin registered at Shiraz University of Medical Sciences. A total of 371 patients [208 males, 163 females] were found: 74.9% pulmonary and 25.1% extrapulmonary cases. Of the 278 new cases of pulmonary tuberculosis, 157 [56.5%] were sputum smear-positive and 121 [43.5%] were sputum smear-negative. The incidence of tuberculosis per 100 000 Afghan population in Fars province was estimated at 96.2, 88.2 and 63.5 in 2000, 2001 and 2002 respectively

Evaluation of rK39 strip test for the diagnosis of visceral leishmaniasis in infants.

This study estimated the sensitivity and specificity of the rK39 strip test compared with the immunofluorescent antibody test and microscopy of bone marrow aspirate smears (the gold standard) in 47 children with suspected visceral leishmaniasis. A control group of children with other diagnoses (tuberculosis, toxoplasmosis, systemic lupus erythematosus, malaria or cutaneous leishmaniasis) were also tested to check false positive results. The sensitivity and specificity of the strip test were 82.4% and 100% and that of immunofluorescent antibody were 100% and 92.7%. The rK39 strip test is reliable where there is no access to laboratory facilities.

Evaluation of rK39 strip test for the diagnosis of visceral leishmaniasis in infants

This study estimated the sensitivity and specificity of the rK39 strip test compared with the immunofluorescent antibody test and microscopy of bone marrow aspirate smears [the gold standard] in 47 children with suspected visceral leishmaniasis. A control group of children with other diagnoses [tuberculosis, toxoplasmosis, systemic lupus erythematosus, malaria or cutaneous leishmaniasis] were also tested to check false positive results. The sensitivity and specificity of the strip test were 82.4% and 100% and that of immunofluorescent antibody were 100% and 92.7%. The rK39 strip test is reliable where there is no access to laboratory facilities

Prevalence of measles antibody in children of different ages in Shiraz, Islamic Republic of Iran.

An outbreak of measles due to secondary vaccine failure prompted this investigation into the prevalence of measles antibody in children. We studied 608 children in 7 different age groups: 6, 9, 14 and 18 months and 6, 10 and 15 years. Children in the 2 youngest groups received no vaccination; the rest were vaccinated at 9 months and 15 months. The 15-year-old age group received an additional vaccination. Transplacental measles antibody (Ab) decreased from 10.0% at 6 months to 0% at 9 months. Measles Ab was positive in 52.9% (14 months), 89.4% (18 months), 60.8% 96 years), 45.0% (10 years) and 96.8% (15 years). To increase Ab levels, a booster vaccination is recommended, administered either with the second DPT booster or at pre-high school age.