Background: Vitrification has been usually used as an assisted reproductive technology in animals and humans. This method needs high concentrations of cryoprotectants that can be toxic with high cooling degrees. Then, vitrification could be change histone modifications such as methylation and acetylation can performance as regulatory controls of gene transcription. So, the purpose of the presen...

Prions are self-propagating protein conformers that cause a variety of neurodegenerative disorders in humans and animals. Mouse models have played key roles in deciphering the biology of prions and in assessing candidate therapeutics. The development of transgenic mice that form prions spontaneously in the brain has advanced our understanding of sporadic and genetic prion diseases. Furthermore,...

Backgrounds and objectives: Interleukin 2 (IL-2) secreted by activated CD4+ T cells  has been known as a major mediator in both  adaptive and native immune system  due to a board range of effects on  different cells in the immunity system (1-6). Methods: cDNA synthesis was performed using gene- specific primers designed by Gene Runner software after RNA extraction of mouse splenocytes. PCR pro...

Laron syndrome [growth hormone (GH) insensitivity syndrome] is a hereditary dwarfism resulting from defects in the GH receptor (GHR) gene. GHR deficiency has not been reported in mammals other than humans. Many aspects of GHR dysfunction remain unknown because of ethical and practical limitations in studying humans. To create a mammalian model for this disease, we generated mice bearing a disru...

Iron overload is known to occur in the West European and American population due to the consumption of iron-rich diets. On the other hand, genetic disorders leading to iron overload are also known. Iron overload leads to increased peroxidation and disruptive disintegration of lipid-rich membranes, and predisposes humans for an enhanced risk of cancer induction. In experimental animals iron ...

we have employed a peptide-based antibody generation protocol for producing antibody against human nestin. using a 12-mer synthetic peptide from repetitive region of human nestin protein devoid of any n- or o-glyco-sylation sequences, we generated a mouse monoclonal antibody capable of recognizing human, mouse, bovine, and rat nestin. a wide variety of nestin proteins ranging from 140-250 kda w...

background: to evaluate the radioprotective potential of punica granatum fruit rind extract (pgre) in mouse testes. materials and methods: adult male mice were divided into four groups. group i was kept without any treatment. group ii was irradiated with 8gy co60 gamma irradiation and group iii was given pgre one hour before irradiation. group iv was fed with pgre at the rate of 10 mg/kg body w...

Helicobacter pylori (HP) infection is one of the most frequent bacterial infections in humans and associated with pathogenesis gastric motility disorders such as delayed emptying (DGE). Although HP considered to delay emptying, there has been little research on underlying mechanism. Gastric involves interactions among gastrointestinal hormones, smooth muscle, enteric extrinsic autonomi...

helicobacter hepaticus was discovered in 1992 as a cause of liver cancer in the a/jcr mouse model. in susceptible mice, infection by h. hepaticus causes chronic gastrointestinal inflammation leading to neoplasia. it can also cause morphological changes in breast-glands leading to neoplasm and adenocarcinoma in mouse models. studies performed on humans have revealed that h. hepaticus may also be...