How does tamoxifen affect cholesterol?
Results: Tamoxifen and toremifene lowered significantly serum low-density lipoprotein (LDL) cholesterol levels after 12 months of treatment by 16% and 15%, with no change in high-density lipoprotein (HDL) cholesterol or serum triglyceride levels.
How does tamoxifen increase triglycerides?
Tamoxifen has both antagonistic and agonistic tissue-specific actions. It can have a paradoxical estrogenic effect on lipid metabolism resulting in elevated triglyceride and chylomicron levels. This can cause life-threatening complications like acute pancreatitis.
How is tamoxifen metabolism?
Tamoxifen is metabolized via CYP2D6 into endoxifen (4-OH-N-desmethyl-tamoxifen), its primary active metabolite. Multiple investigations have identified genetic variants of CYP2D6 that can affect its activity, which in turn affects the metabolism of tamoxifen.
Can tamoxifen cause hyperlipidemia?
It is well known that one of the side effects of tamoxifen is an increase in serum triglycerides. A study by Liu et al found that in patients with a history of hyperlipidemia, mean serum triglycerides increased from 194.79 ± 71.85 mg/dL to 268.79 ± 163.81 mg/dL after 15 months of tamoxifen.
Does tamoxifen reduce bone density?
Results. In the women given tamoxifen, the mean bone mineral density of the lumbar spine increased by 0.61 percent per year, whereas in those given placebo it decreased by 1.00 percent per year (P<0.001). Radial bone mineral density decreased to the same extent in both groups.
Does tamoxifen increase HDL?
Cholesterol and free cholesterol were decreased in tamoxifen treated groups while the other lipids show a moderate increase. HDL-cholesterol was increased but LDL-cholesterol was decreased in the tamoxifen treated groups.
Can taking Tamoxifen cause osteoporosis?
Conclusions: Tamoxifen is not associated with an increased risk of osteoporosis and osteoporotic fracture in premenopausal breast cancer patients. Tailored screening strategies for breast cancer survivors with different osteoporosis risks are needed.
Does Tamoxifen cause pancreatitis?
Tamoxifen induced pancreatitis is a rare phenomenon and this side effect must be borne in mind while patient is being considered for this drug. As tamoxifen is being used very commonly in ER and PR positive breast cancer patients in pre and post menopausal state, many females are at risk of developing this side effect.
How is tamoxifen metabolized liver?
Tamoxifen metabolism mostly occurs via two pathways, 4-hydroxylation and N-demethylation, both of which result in the very potent secondary metabolite, endoxifen.
What is the function of tamoxifen?
It is used to reduce the risk of breast cancer in women who are at high risk for the disease due to their age, personal medical history, and family medical history. Tamoxifen is in a class of medications known as antiestrogens. It blocks the activity of estrogen (a female hormone) in the breast.
What are the side effects of Tamoxifen?
Tamoxifen may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- increased bone or tumor pain.
- pain or reddening around the tumor site.
- hot flashes.
- nausea.
- excessive tiredness.
- dizziness.
- depression.
- headache.
Does tamoxifen cause osteopenia?
Breast cancer survivors who were younger, had ER-positive tumors, received aromatase inhibitors alone, or received combined chemotherapy with aromatase inhibitors or tamoxifen had a higher risk of osteopenia and osteoporosis than cancer-free women.
How does tamoxifen affect glucose metabolism?
Tamoxifen affects glucose and lipid metabolism parameters, causes browning of subcutaneous adipose tissue and transient body composition changes in C57BL/6NTac mice Tamoxifen is a selective estrogen receptor (ER) modulator which is widely used to generate inducible conditional transgenic mouse models.
How effective is tamoxifen for treating high cholesterol?
Longitudinal studies in 24 patients treated with tamoxifen (10 mg, twice daily) indicated average decreases in total serum cholesterol (17%) and LDL-cholesterol (27%), whereas the effect of tamoxifen on HDL-cholesterol varied with the individual patient.
Is tamoxifen a cytostatic drug?
Tamoxifen causes cells to remain in the G0 and G1 phases of the cell cycle. Because it prevents (pre)cancerous cells from dividing but does not cause cell death, tamoxifen is cytostatic rather than cytocidal. 11. Pharmacokinetic Long t1/2 : 7 -14 days. OD dose can be used Reduced bioavailability is not a cause for resistance.
What is tamoxifen modulation of etoposide sytotoxicity?
Tamoxifen modulation of etoposide sytotoxicity involves inhibition of protein kinase C activity and insulin-like growth factor II expression in brain tumor cells. Journal of Neuro-Oncology.