Question explored with the scientific record
Conversation so far
- 1 Liver side effects of long term tamoxifen
- 2 What liver tests should I monitor on long-term tamoxifen?
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What liver tests should I monitor on long-term tamoxifen?
The short version: the evidence you were given does not answer your question about which liver tests to monitor on tamoxifen.
The retrieved studies are almost entirely about hepatitis C, hepatitis B, NAFLD biomarkers, and drug-induced liver injury from other drugs (disulfiram, raltegravir, interferons). Only two records directly involve tamoxifen and liver tests. One rat study [18] measured AST, ALT, and ALP after tamoxifen and found elevations: AST rose from 128 to 203 IU/L, ALT from 51 to 62 IU/L. A 2025 rat study [20] confirmed tamoxifen raised ALT from 68 to 112 U/L, AST from 162 to 250 U/L, and ALP from 55 to 77 U/L. That is the entire human-relevant monitoring evidence in this retrieval.
No human trial in this set compared different monitoring strategies. No study tested whether checking ALT alone versus ALT plus AST plus ALP plus GGT catches injury earlier. No study examined how often to test (every 3 months, every 6 months). The 2015 human study [17] measured ALT and ALP in 47 breast cancer patients but was cross-sectional and did not compare monitoring schedules.
What standard oncology practice does, outside this retrieval, is check ALT, AST, and ALP at baseline and every 3 to 6 months. The retrieved evidence does not confirm or challenge that schedule. It simply does not contain the comparison.
My call: the evidence here does not tell you which tests to run or how often. The standard panel (ALT, AST, ALP) is what the animal data measured, but no human monitoring trial was retrieved. Confidence: not clear.
Sources examined 29
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Treatment of chronic hepatitis C with interferon‐α by monitoring the response according to viraemia
This study evaluates the efficacy of a modified interferon-alpha treatment regimen for chronic hepatitis C by monitoring patient responses through alanine aminotransferase and HCV RNA levels, revealing a sustained response in 68.7% of patients who normalized ALT levels after ini…
DOI: 10.1111/j.1365-2893.1997.tb00212.x -
Hepatitis C virus screening and clinical monitoring of biomarkers in patients undergoing hemodialysis
This study investigates the seroprevalence of hepatitis C virus (HCV) and the immunological and biochemical profiles of hemodialysis patients in Manaus, Brazil, revealing a 13.9% seroprevalence and significant alterations in immune cell populations and alanine aminotransferase (…
DOI: 10.1002/jmv.21521 -
Detection of hepatitis C virus by polym erase chain reaction in haemodialysed patients in relationship to anti-HCV status
This study investigates the detection of hepatitis C virus (HCV) RNA in 41 haemodialysed patients with known anti-HCV status, revealing a strong association between HCV viraemia and anti-HCV positivity, with implications for monitoring and treatment.
DOI: 10.1016/s0923-2516(06)80034-8 -
Monitoring cytotoxic potentials of furfuryl alcohol and 2-furyl methyl ketone in mice
This study investigates the cytotoxic effects of furfuryl alcohol and 2-furyl methyl ketone on liver and kidney tissues in mice, revealing significant hepatotoxicity associated with furfuryl alcohol but not with 2-furyl methyl ketone after prolonged exposure.
DOI: 10.1016/j.fct.2007.08.008 -
Transmission of SEN virus from mothers to their babies
This study investigates the transmission of SEN virus (SENV) from mothers to their infants, revealing that vertical transmission occurs but may not lead to persistent viremia, with transient elevations of alanine aminotransferase observed in some infants.
DOI: 10.1002/jmv.2162 -
Screening for Disulfiram‐Induced Liver Test Dysfunction in an Inpatient Alcoholism Program
This study investigates the frequency of disulfiram-induced elevations in liver function tests among patients in an inpatient alcoholism program, revealing that 25% of patients experienced elevated alanine aminotransferase levels after 2 to 4 weeks of treatment.
DOI: 10.1111/j.1530-0277.1993.tb00745.x -
Advances in non-invasive biomarkers for the diagnosis and monitoring of non-alcoholic fatty liver disease
An integrative review summarizing current noninvasive biomarkers and imaging methods for diagnosing and monitoring NAFLD, NASH, and hepatic fibrosis, evaluating performance, limitations, and clinical utility of blood- and imaging-based tests across diverse populations.
DOI: 10.1016/j.metabol.2020.154259 -
Changes in plasma enzyme activities in professional racing cyclists.
This study investigates the changes in plasma enzyme activities, specifically aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, and alkaline phosphatase, in professional racing cyclists before and after participating in two different road races, reveal…
DOI: 10.1136/bjsm.30.2.122 -
Incidence and risk factors for liver enzymes elevations in highly treatment-experienced patients switching from enfuvirtide to raltegravir: a sub-study of the ANRS-138 EASIER trial
This study investigates the incidence and risk factors for liver enzyme elevations in highly treatment-experienced HIV patients switching from enfuvirtide to raltegravir, revealing a significant association between tipranavir use and elevated alanine aminotransferase levels.
DOI: 10.1186/s12981-016-0101-3 -
Higher Ratio of Serum Alpha-Fetoprotein Could Predict Outcomes in Patients with Hepatitis B Virus-Associated Hepatocellular Carcinoma and Normal Alanine Aminotransferase
This study investigates the predictive value of serum alpha-fetoprotein (AFP) levels for outcomes in patients with hepatitis B virus-associated hepatocellular carcinoma (HCC) and normal alanine aminotransferase levels, finding that an AFP ratio greater than 1.0 is significantly …
DOI: 10.1371/journal.pone.0157299 -
Liver injury associated with the β-interferons for MS
This study conducted a population-based retrospective chart review of 844 multiple sclerosis patients in British Columbia, revealing that 36.9% developed elevated alanine aminotransferase levels after being prescribed different β-interferon products, with significant differences…
DOI: 10.1212/wnl.62.4.628 -
Novel strategies for the early diagnosis of hepatitis B virus reactivation
This paper is a narrative review summarizing how medications influence hepatitis B virus (HBV) reactivation in HBV-resolved patients and detailing newly developed biomarkers (high-sensitivity HBsAg, ultra-sensitive ICT-CLEIA, and iTACT-HBcrAg) for the early diagnosis and monitor…
DOI: 10.1111/hepr.13699 -
Monitoring of Extracellular Aspartate Aminotransferase and Troponin T by Microdialysis during and after Cardioplegic Heart Arrest
This study investigates the monitoring of extracellular aspartate aminotransferase (ASAT) and troponin T levels via microdialysis during and after cardioplegic heart arrest in patients undergoing open-heart surgery, revealing significant correlations between interstitial and ser…
DOI: 10.1159/000006966 -
Analysis of Gingival Crevicular Fluid Intracytoplasmic Enzyme Activity in Patients With Adult Periodontitis and Rapidly Progressive Periodontitis. A Longitudinal Study Model With Periodontal Treatment
This longitudinal study investigates the activity of intracytoplasmic enzymes in gingival crevicular fluid from patients with adult and rapidly progressive periodontitis, revealing significant differences in enzyme levels before and after periodontal treatment, with implications…
DOI: 10.1902/jop.1998.69.10.1155 -
Non‐invasive tests for liver disease severity and the hepatocellular carcinoma risk in chronic hepatitis B patients with low‐level viremia
This study investigates the effectiveness of non-invasive serum biomarkers, specifically the aspartate aminotransferase to platelet ratio index (APRI) and the Fibrosis-4 (FIB-4) score, in stratifying the risk of hepatocellular carcinoma (HCC) in chronic hepatitis B patients with…
DOI: 10.1111/liv.13489 -
Relationship Between a Levels of Aspartate Aminotransferase (Ast), Alanine Aminotransferase (Alt), Sedimentation Rate of Blood (Led) and Interleukin (Il)-6 in Patients with Tuberculosis (Tb) and Latent After 2 Months Treatment of Tuberculosis (Tb)
After two months of anti-TB treatment, active TB shows higher AST and IL-6 than latent TB, while LED is higher in latent TB and ALT shows no significant difference.
DOI: 10.17762/jaz.v44i4.1384 -
LIVER ENZYMES
A cross-sectional study of 47 female breast cancer patients in Karachi, Pakistan, comparing liver enzyme changes during cancer treatment between those with diabetes and those with cardiac comorbidities, finding post-treatment increases in alkaline phosphatase and variable ALT el…
DOI: 10.29309/tpmj/2015.22.06.1242 -
Modulation of tamoxifen-induced hepatotoxicity by tamoxifen–phospholipid complex
This study investigates the hepatoprotective effects of a tamoxifen-phospholipid complex (TMX-PLC) against tamoxifen-induced hepatotoxicity in female Sprague-Dawley rats, demonstrating significant improvements in liver function and antioxidant enzyme activity.
DOI: 10.1111/jphp.12422 -
54 Tamoxifen inhibits mitochondrial function, topoisomerases and mitochondrial DNA synthesis, and causes progressive mitochondrial DNA depletion and steatosis in mouse liver
This study investigates the impact of obesity and diabetes on liver-related death in a cohort of 963 patients with compensated alcoholic and viral cirrhosis, finding that overweight significantly increases the risk of liver-related mortality.
DOI: 10.1016/s0168-8278(05)81466-7 -
Cardamom extract alleviates tamoxifen-induced liver damage by suppressing inflammation and pyroptosis pathway
This study investigates the protective effects of cardamom extract against tamoxifen-induced liver damage in female rats, demonstrating its ability to suppress inflammation and the pyroptosis pathway.
DOI: 10.1038/s41598-025-89091-0 -
Evaluation of liver function using the L-[1,2-13C] ornithine breath test
This study investigates the therapeutic benefits of fenofibrate in patients with breast cancer and tamoxifen-induced non-alcoholic steatohepatitis (NASH), focusing on its role in inhibiting estrogen synthesis in the ovaries.
DOI: 10.1016/s0016-5085(03)80797-7 -
Tamoxifen: a novel treatment for primary biliary cirrhosis?
This study presents two cases of patients with primary biliary cirrhosis who experienced a significant reduction in serum alkaline phosphatase levels while undergoing tamoxifen therapy, suggesting a potential therapeutic role for tamoxifen in this condition.
DOI: 10.1111/j.1478-3231.2004.00920.x -
Protein domain characterization reveals human MIC60 tolerates loss of helical bundle domain
A structure-function dissection of human MIC60 (IMMT) in mammalian cells shows that the transmembrane, coiled-coil, and mitofilin domains are essential for MICOS assembly and mitochondrial function, while a large helical bundle domain is largely dispensable; a disease-associated…
DOI: 10.64898/2026.03.19.713006 -
The homeodomain protein Meis1 is essential for definitive hematopoiesis and vascular patterning in the mouse embryo
Meis1 is essential for establishing definitive hematopoiesis and proper vascular patterning in the mouse embryo; Meis1 inactivation disrupts definitive HSC birth in the AGM and fetal liver, impairs megakaryocyte lineage development, reduces Runx1-expressing cells and intra-arter…
DOI: 10.1016/j.ydbio.2005.01.004 -
PBAF/cBAF reorganization on H3.3 chromatin regulates BMAL1 activity in the absence of circadian negative feedback
The study reveals that H3.3-containing fragile nucleosomes recruit PBAF and BRG1/cBAF remodelers to CLOCK-BMAL1 target sites during the active phase in liver, enabling BMAL1 activity; in the absence of circadian negative feedback (PerKO), PBAF/cBAF disassembly and a remodeler sw…
DOI: 10.1038/s41467-025-64045-2 -
Onapristone, a progesterone receptor antagonist, as first-line therapy in primary breast cancer
This study investigates the efficacy of Onapristone, a progesterone receptor antagonist, as a first-line endocrine therapy in patients with primary breast cancer, reporting a 67% overall tumor remission rate among 19 patients treated.
DOI: 10.1016/s0959-8049(98)00388-8 -
Liver hyperplasia after tamoxifen induction of Myc in a transgenic medaka model
Tamoxifen-inducible medaka Myc17ER reveals dose-dependent Myc-driven proliferation and apoptosis in vivo, with chronic activation causing liver hyperplasia, demonstrated using two independently generated transgenic lines with differing transgene expression.
DOI: 10.1242/dmm.008730 -
D538G Mutation in Estrogen Receptor-α: A Novel Mechanism for Acquired Endocrine Resistance in Breast Cancer
This study identifies a novel D538G mutation in the estrogen receptor alpha (ERα) that confers resistance to endocrine therapy in metastatic breast cancer, highlighting its role in acquired endocrine resistance and suggesting potential therapeutic targets.
DOI: 10.1158/0008-5472.can-13-1197 -
Generation of a conditional knockout allele for the NFAT5 gene in mice
Generation and initial characterization of a conditional NFAT5 knockout allele in mice by flanking exon 4 with loxP sites and using a tamoxifen-inducible Cre recombinase to knock down NFAT5 in adult tissues, enabling tissue- and cell-type-specific studies of NFAT5 function in vi…
DOI: 10.3389/fphys.2014.00507