sterol/sarcoma

The hormonal metabolite of vitamin D3, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), exerts its biological effects by initially binding to a cytosolic receptor protein. Such a protein has been demonstrated in the target organs of vitamin D3 including bone. Although the role of 1,25(OH)2D3 on the skeleton

The effects of two inhibitors of lipid biosynthesis on the replication of Rous sarcoma virus Prague C strain in chick embryo fibroblasts have been examined in media containing delipidated serum. 25-Hydroxycholestetate into sterols, had no effect on the formation of infectious virions or on the

We have recently demonstrated that 48 hour exposure of ROS 17/2 cells to low concentrations of 1,25-dihydroxycholecalciferol (1,25-(OH)2D3) (1.0 pg/ml) stimulated the cellular accumulation of 45Ca, and exposure to high concentrations (160 pg/ml) inhibited such accumulation. In the present study,

Clostridium difficile is associated with antibiotic-associated diarrhea and pseudomembranous colitis in humans. Its 2 major toxins, toxins A and B, enter host cells and inactivate GTPases of the Ras homologue/rat sarcoma family by glucosylation. Pore formation of the toxins in the endosomal membrane

Insulin-like growth factor I (IGF-I) and the gonadotropin, FSH, can synergize to stimulate progesterone production in primary cultures of maturing human, rat, and pig granulosa cells. These trophic hormones act by increasing the activity and production of proteins and their gene transcripts

Insulin and insulin-like growth factor I (IGF-I) can amplify gonadotropin-stimulated steroidogenesis by augmenting the expression of key sterol regulatory genes in ovarian cells, viz. low density lipoprotein (LDL) receptor, steroidogenic acute regulatory protein, and P450 cholesterol side-chain

Transformation of mouse 3T3 cells by SV40 results in a specific membrane modification which renders cells resistant to the killing action of the lipophilic antibiotic Amphotericin B. This alteration is under genetic cellular control and is specific for SV40 transformation since transformation with

The association of cell surface receptors with sterol-sphingolipid-enriched microdomains of the plasma membrane, so-called lipid rafts, may affect the receptor-mediated entry and trafficking dynamics of viruses. A model retrovirus, subgroup A avian sarcoma and leukosis virus (ASLV-A), can initiate

Metastatic progression is the cause of most cancer deaths. Host tumour cell separation (fission) is accompanied by simultaneous acquisition of migrating capability of cancer cells, remodeling of cellular architecture and effective 'homing' in body host environment. Cell remodeling involves

Gastrointestinal stromal tumors (GISTs) are the most common type of mesenchymal tumor in the gastrointestinal tract. The present study aimed to identify the potential candidate biomarkers that may be involved in the pathogenesis and progression of v‑kit Hardy‑Zuckerman 4 feline sarcoma viral

Cryptococcosis is a life-threatening infection caused by pathogenic fungi of the genus Cryptococcus. Infection occurs upon inhalation of spores, which are able to replicate in the deep lung. Phagocytosis of Cryptococcus by macrophages is one of the ways that the disease is able to spread into the