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1.
S. M. Ghaffari 《Plant Systematics and Evolution》1986,153(3-4):199-204
Meiosis and mitosis are described in cultivatedCrocus sativus of Iran. This indicates that this species is an autotriploid and sterile. Karyotype analysis, rare inversions, laggard chromosomes and distribution of chromosomes in the first anaphase are described, and the reasons for its sterility are given. 相似文献
2.
Cloning and sequence analysis of channel catfish heavy chain cDNA indicate phylogenetic diversity within the IgM immunoglobulin family 总被引:6,自引:0,他引:6
Catfish cDNA libraries were constructed using the poly(A+) RNA obtained from in vitro stimulated catfish leukocytes. Antigenic analysis with different antisera to catfish Ig resulted in the definition of cDNA clones encoding the catfish H chain. Sequence analysis confirmed that the catfish H chain was definitively identified, based on its similarities with chicken and mouse mu chains. Two clones were each shown to encode part of the CH2 domain, the complete CH3 and CH4 domains, the C-terminus, and a 184-bp 3' untranslated region before the poly(A+) tail. The conservation of domain size and structure is clearly evident. The two cysteines forming the intradomain disulfide bridge, as well as the tryptophans located within each domain, are absolutely conserved. There are four carbohydrate acceptor sites in the catfish H chain, only one of which is phylogenetically conserved. Of the six sequenced H chain clones, one was found to differ in a single base in the CH3, which results in the loss of a carbohydrate acceptor site. Whether this difference indicates isotypic variation between closely related genes or somatic mutation is unresolved. Amino acid sequence comparisons indicate that there is a approximately 24% similarity when the catfish H chain is aligned with mouse mu chains. This is considerably less than the approximately 40% amino acid conservation found between the chicken and mouse mu chain. The amino acid sequence of the catfish H chain is most conserved in the C-terminus (approximately 30%) and the CH4 (approximately 26%); there is less conservation in the CH3 (approximately 20%) when comparisons are made with mouse mu chain. The CH3 domain of the catfish H chain also has different hydropathy properties, when compared with the CH3 domain of the higher vertebrate mu chains. Finally, the sequence of the catfish H chain indicates an unusual arrangement of the cysteines that likely participate in intersubunit and inter-H chain disulfide linkages. The disulfide linkage of these cysteines during Ig polymerization may account for the unusual covalent architecture associated with the catfish tetramer. 相似文献
3.
Ahmadi Fakhrieh Nazari Farzad Ghaderi Naser Teixeira da Silva Jaime A. 《Journal of Plant Growth Regulation》2023,42(1):168-182
Journal of Plant Growth Regulation - Salinity stress is one of the most important global problems that afflicts and limits the growth and development of turfgrass in arid and semi-arid areas.... 相似文献
4.
Anticancer potential of Ferula assa-foetida and its constituents,a powerful plant for cancer therapy
Mohammad Amin Ghaffari Sirizi Jalil Alizadeh Ghalenoei Mohammad Allahtavakoli Hasan Forouzanfar Seyyed Majid Bagheri 《World journal of biological chemistry》2023,14(2):28-39
Cancer is one of the main challenges of the health system around the world. This disease is increasing in developing countries and imposes heavy costs on patients and governments. On the other hand, despite various drugs, the death rate among cancer patients is still high and the current treatments have many harmful effects. In the traditional medicine of different countries, there are many medicinal plants that can be effective in the treatment of cancer. Ferula plants are traditionally used as spices and food or for medicinal purposes. Ferula assa-foetida is one of the famous plants of this genus, which has been used for the treatment of various diseases since ancient times. Among the main compounds of this plant, we can mention monoterpenes, sulfide compounds and polyphenols, which can show different therapeutic effects. This article has been compiled with the aim of collecting evidence and articles related to the anti-cancer effects of extracts, derived compounds, essential oils and nanoparticles containing Ferula assa-foetida. This review article was prepared by searching the terms Ferula assa-foetida and cancer, and relevant information was collected through searching electronic databases such as ISI Web of Knowledge, PubMed, and Google Scholar. Fort unately, the results of this review showed that relatively comprehensive studies have been conducted in this field and shown that Ferula assa-foetida can be very promising in the treatment of cancer. 相似文献
5.
Mohyeddin Mandana Bonab Kamran Alimoghaddam Fatemeh Talebian Syed Hamid Ghaffari Ardeshir Ghavamzadeh Behrouz Nikbin 《BMC cell biology》2006,7(1):14-7
Background
A hot new topic in medical treatment is the use of mesenchymal stem cells (MSC) in therapy. The low frequency of this subpopulation of stem cells in bone marrow (BM) necessitates their in vitro expansion prior to clinical use. We evaluated the effect of long term culture on the senescence of these cells. 相似文献6.
Saremi Leila Shafizadeh Marziyeh Esmaeilzadeh Emran Ghaffari Mohammad Ebrahim Mahdavi Mohammad hosein Amid Reza Kadkhodazadeh Mahdi 《Molecular biology reports》2021,48(3):2285-2290
Molecular Biology Reports - Peri-implantitis (PI) is a multifactorial condition caused by the interactions of pathogens and the host immune response. Previous studies have demonstrated a... 相似文献
7.
Rostaminia Samaneh Aghaei Seyed Soheil Farahmand Behrokh Nazari Raziye Ghaemi Amir 《International journal of peptide research and therapeutics》2021,27(4):2625-2638
International Journal of Peptide Research and Therapeutics - Influenza A viruses are among the most studied viruses, however no effective prevention against influenza infection has been developed.... 相似文献
8.
M. Ghasemi A. Ghaffari H. SadAbadi H. Golbayani 《Computer methods in biomechanics and biomedical engineering》2013,16(6):857-864
Hypothesis/objective: Prolonged QT interval is an index of propensity for dangerous ventricular tachyarrhythmias. The aim of this article is to establish an automatic algorithm for QT interval measurement. Method: The proposed method is based on the continuous wavelet transform. In this method, the concepts of the rescaled wavelet coefficients and dominant scales of the electrocardiogram (ECG) components are used to perform detection of ECG characteristic points. A new concept of rescaled maximum energy density is introduced so as to perform the estimation of the QT interval. Results and conclusion: We have applied the algorithm to the PTB database of the Physiobank?Physionet in lead II. Then, the results were evaluated using pertinent reference QT. The criterion used for evaluation of the method's performance is the root mean square (RMS) error. The method approached the RMS error of 27.89 ms for 549 subjects. The proposed method is fast, simple and is applicable to a wide range of ECG cardio cycle morphologies. 相似文献
9.
Mojgan Nazari Sue Yee Lim Mahira Watanabe Reuben S. K. Sharma Nadzariah A. B. Y. Cheng Malaika Watanabe 《PLoS neglected tropical diseases》2013,7(1)
An epidemiological study of Ehrlichia canis infection in dogs in Peninsular Malaysia was carried out using molecular detection techniques. A total of 500 canine blood samples were collected from veterinary clinics and dog shelters. Molecular screening by polymerase chain reaction (PCR) was performed using genus-specific primers followed by PCR using E. canis species-specific primers. Ten out of 500 dogs were positive for E. canis. A phylogenetic analysis of the E. canis Malaysia strain showed that it was grouped tightly with other E. canis strains from different geographic regions. The present study revealed for the first time, the presence of genetically confirmed E. canis with a prevalence rate of 2.0% in naturally infected dogs in Malaysia. 相似文献
10.
Mozafari Haniyeh Amiri Shayan Mehr Shahram Ejtemaei Momeny Majid Amini-khoei Hossein Bijani Soroush Hosseini Mir-Jamal 《Molecular biology reports》2020,47(8):6143-6153
Molecular Biology Reports - Neuroinflammation and mitochondrial dysfunction are suggested as mechanisms which are implicated in the pathophysiology of depression. Streptozotocin (STZ) is known to... 相似文献