Comparison of callus induction and somatic embryogenesis of some Iranian cottons (Gossypium Spp.) with Coker 312 and histology of somatic embryogenesis

Callus induction and somatic embryogenesis from hypocotyl explants of some Iranian cottons spp. (Hashem abad, Kerman, Termez and Sepid) were compared with Coker 312 through induction and formation of embryogenic calli on medium of Murashige and Skoog (MS) with Gamborg vitamins (B5) supplemented with the following compositions: MSB1 (0.5 mg/l zeatin), MSB2 (1 mg/l zeatin), MSB3 (0.5 mg/l 2,4-dichlorophenoxyacetic acid, 0.1 mg/l kinetin), MSB4 (1 mg/l 2,4-D, 0.5 mg/l kinetin, 0.5 mg/l zeatin) and MSB5 (2 mg/l α-naphtalene-3-acetic acid, 1 mg/l kinetin, 0.75 mg/l MgCl2). The optimum medium for the proliferation of embryogenic calli was MS medium containing B5 vitamins, 1 mg/l 2,4-D, 0.5 mg/l kinetin and 0.5 mg/l zeatin and the optimum medium for the development of somatic embryos was MS medium (NH4NO3 was removed and KNO3 amount doubled) containing B5 vitamins, 40 g/l sucrose and without hormone. Media MSB1, MSB2 and MSB4 gave the highest percentage (100%) of calli induction in Coker 312 but the lowest induction (46.66%) was observed when Hashem abad explants were cultured in the MSB3 medium. Embryogenesis percentage of Termez (2.22  to 24.40%), Hashemabad (1.85 to 9.73%) and Sepid (9.06 to 22.28%) genotypes were significantly lower than that of Coker 312 (66.66 to 94.33%). The Kerman genotype did not show embryogenesis. In the histological studies, the different development stages of the embryos (globular, heart, torpedo and cotyledonary) together with callus cells were showed.Key words: Hypocotyl explants, somatic embryo, in vitro regeneration, germination, somatic embryogenesis histology

The presence of anti thyroid and anti ovarian auto-antibodies in familial premature ovarian failure

Background: Premature ovarian failure (POF) is a disorder of multi causal etiology. Autoimmunity has been proposed as a mechanism for some cases of ovarian follicle dysfunction which is evident in POF. The aim of this study was to identify the level of auto-antibodies in POF and familial POF patients. Materials and Methods: In this study, auto-antibodies including anti-ovarian antibody (AOA), anti thyroid peroxidase (TPO) and anti thyroglobulin (TG) antibodies were assessed in the sera of 43 cases with spontaneous POF including 12 cases affected by familial POF. The control samples were obtained from sera of 39 women with normal ovulatory or post menopause women. Results: AOA were detected in 46.5 of the POF group, 41.7 of the familial POF group and 41 of the control group without significant statistical difference between the three groups. Thyroid peroxidase (TPO) antibody was found in 32.6 of the POF group, 41.6 of the familial POF group and 10.3 of the control group. Anti TPO was detected significantly high in both POF and familial POF groups (p<0.02 and p<0.01, respectively). Thyroglobulin (TG) antibody was found in 48.8 of the POF group, 75 of the familial POF group and 23.1 of the control group with meaningful difference (p<0.02 and p<0.001, respectively). TG antibody was significantly higher in familial POF group in comparison to POF group (p<0.03). Conclusion: Although measurement of AOA is not a reliable method for diagnosis of auto-immune POF, but existence of anti thyroid antibodies in familial POF (mainly anti TG) can potentially represent an autoimmune mechanism. It is possible to propose a genetic component for developing autoimmune POF supported by presence of anti thyroid antibodies in familial POF

E-selectin gene polymorphisms in Iranian chronic hepatitis B patients

Background and Aims: The aim of this study was to detect the substitutions Ser128Arg (A128C) and Leu554Phe (T554C) which are responsible for E-selectin polymorphisms in patients with chronic hepatitis B and healthy controls. We investigated possible association of the Ser128Arg and Leu554Phe gene polymorphisms in the E-selectin gene with susceptibility to chronic hepatitis B. Methods: Sixty-three patients with chronic hepatitis B virus infection and 150 healthy subjects were recruited sequentially as they presented to clinic. Classification of chronic hepatitis B virus (HBV)-infected patients was as asymptomatic carrier state (34 patients) and chronic hepatitis B (29 patients). Genomic DNA was isolated from anticoagulated peripheral blood Buffy coat using Miller�s salting-out method. The presence of the E-selectin gene polymorphisms was determined by using polymerase chain reaction amplification refractory mutation system (ARMS). Results: Distribution of E-selectin 128 (A+C-, A+C+, A-C+) genotypes and E-selectin 554 (C+T-, T+C-, C+T+) genotypes were not statistically different in chronic hepatitis B patients and controls (P=0.41 and 0.96, respectively). Also, two groups had no significant difference in distribution of frequencies of allele 128A (P=0.41), 128C (P=0.15), allele 554C (P=0.85), and allele 554T (P=0.76). Carrying of allele 128A (OR=0.58, 95 CI=0.16-2.12), 128C (OR=1.52, 95 CI=0.84-2.74), 554C (OR=1.24, 95 CI=0.12-12.08), and allele 554T (OR=0.88, 95 CI=0.38-2.01) were not risk factors for susceptibility to chronic hepatitis B infection. Conclusions: Carrying E-selectin gene polymorphisms of Ser128Arg and Leu554Phe is not considered risk factor for susceptibility to chronic hepatitis B infection. © 2007, Kowsar Medical Publishing Company. All rights reserved

Assessment of human cytomegalovirus co-infection in Egyptian chronic HCV patients

Human cytomegalovirus (HCMV) is the most common cause of severe morbidity and mortality in immune- compromised individuals. This study was conducted to determine the incidence of HCMV infection in HCV patients who either spontaneously cleared the virus or progressed to chronic HCV infection. The study included a total of eighty four cases (48 females and 36 males) that were referred to blood banks for blood donation with an age range of 18-64 years (mean age 37.62 ± 10.03 years). Hepatitis C virus RNA and HCMV DNA were detected in sera by RT-nested PCR and nested PCR respectively in all subjects. Immunoglobulin G levels for HCV and HCMV were determined. Besides, IgM antibodies for HCMV infection were also determined in subjects' sera. Fifty three out of 84 cases (63%) were positive for HCV-RNA while 31 (37%) cases had negative HCV RNA. Forty six (87%) and 13 (25%) cases out of 53 HCV RNA positive patients were positive for HCMV IgG and IgM antibodies respectively. While 20 of 53 cases (38%) had detectable HCMV DNA. To examine the role of HCMV infection in HCV spontaneous resolution, two groups of HCV patients, group 1) chronic HCV infection (positive HCV RNA and positive IgG antibodies) vs group 2) spontaneous resolution (negative HCV RNA and positive IgG antibodies) were compared. The percentages of positive CMV IgG and IgM results is higher in chronic HCV patient than those in spontaneously cleared HCV patients and the difference is highly statistically significant (P value < 0.001). Also, there is a general trend towards elevated levels of CMV IgG antibodies in HCV chronic patients than those in spontaneously cleared HCV patients (P value < 0.02). HCMV DNA detection in group 1 was more than twice the value observed in group 2 (38% vs 14.3%, P value < 0.001). Moreover, levels of liver enzymes were significantly higher in HCV RNA positive cases co-infected with HCMV DNA than HCMV negative cases (P value < 0.001). The results indicate the role of HCMV in the liver pathogenesis. We conclude that chronic HCV patients co-infected with HCMV infection can be regarded as high risk groups for liver disease progression where they should be monitored for the long term outcome of the disease

Epidemiology and transmission of hepatitis G virus infection in dialysis patients.

Hepatitis G virus (HGV) or GB-virus type C (GBV-C) is distributed globally and is present in the volunteer blood donor population. For epidemiological studies, HGV is of interest in hemodialysis patients who are at risk of parenterally transmitted infections. The role of HGV in producing illness and hepatic disease has yet to be determined. A review of literature was performed in 2009 to summarize scientific reports on epidemiology and pathogenesis of the HGV infection and its exposure through hemodialysis

Cytotoxic effect of Drimia maritima bulb extract and induction of mitochondrial apoptotic signaling in human breast cancer cells, MCF-7 and MDA-MB-468

Maryam Hamzeloo-Moghadam,1 Mahmoud Aghaei,2 Mohammad Hossein Abdolmohammadi,3 Amir Khalaj,1,4 Faranak Fallahian3 1Traditional Medicine and Materia Medica Research Center and Department of Traditional Pharmacy, School of Traditional Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; 2Department of Clinical Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran; 3Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran; 4Food and Drug Laboratory Research Center, Food and Drug Organization, Ministry of Health and Medical Education, Tehran, Iran Background: Drimia maritima (D.&nbsp;maritima) is a plant belonging to the family Asparagaceae, which has been used for the treatment of several ailments including cancer around the world. To&nbsp;our knowledge, there is no comprehensive study about the molecular mechanisms of anticancer activity of this plant, yet.Materials and methods: In the current study, cell viability, apoptosis induction, ROS production, mitochondrial apoptotic pathway, and ER stress mediators have been evaluated in breast cancer cells, MCF7, and MDA-MB-468 treated with D.&nbsp;maritima.Results: Significant cytotoxic effects were observed in MCF-7 and MDA-MB-468 cells after exposure to D.&nbsp;maritima. Apoptosis induction was determined using Annexin-V-FITC and propidium iodide staining. Furthermore, an increase of ROS, loss of mitochondrial membrane potential, the release of cytochrome c, activation of caspases, and elevation in the Bax/Bcl-2 ratio was determined. D.&nbsp;maritima dose-dependently increased the mRNA expression of ER stress markers such as CHOP, ATF-4, GADD34, and TRIB3 in MCF-7, and MDA-MB-468 cells.Conclusion: These data suggest that D.&nbsp;maritima induces apoptosis in human breast cancer cells via the mitochondrial-mediated pathway. In addition, endoplasmic reticulum stress seems to be involved in D.&nbsp;maritima-induced cell death. Keywords: Drimia maritima, ROS, apoptosis, mitochondria, breast cancer, ER stress&nbsp

Application of Couple Sparse Coding in Smart Damage Detection of Truss Bridges

Damage detection of bridge structures plays a crucial role in in-time maintenance of such structures, which subsequently prevents further propagation of the damage, and likely collapse of the structure. Currently, the application of machine learning algorithms are growing in smart damage detection of structures. This work focuses on application of a new machine learning algorithm to identify the location and severity of damage in truss bridges. Frequency Response Functions (FRFs) are used as damage features, and are compressed using Principal Component Analysis (PCA). Couple Sparse Coding (CSC) is adopted as a classification method to learn the relationship between the bridge damage features and its damage states. Two truss bridges are used to test the proposed method and determine its accuracy in damage detection of truss bridges. It is found that the proposed method provides a reliable detection of damage location and severity in truss bridges