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Home > Health Conditions > Homocysteine


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  • Ultra-High Dose Drug Slows Functional Decline in Early ALS, Phase 3 Data Show - Medscape, 5/12/22 - "Methylcobalamin, an active form of vitamin B12 analogue, helps eliminate homocysteine, which is neurotoxic and induces oxidative stress, mitochondrial dysfunction, inflammation, and motor neuron death. Plasma homocysteine levels are reported to be elevated in patients with ALS ... In the 90% of patients taking riluzole concomitantly, the difference in favor of methylcobalamin was even greater (–2.11 ... The results suggest that riluzole and ultrahigh-dose methylcobalamin not only have an additive but possibly also a synergistic effect"
  • Associations of homocysteine metabolism with the risk of spinal osteoarthritis progression in postmenopausal women - J Clin Endocrinol Metab 2021 Aug 10 - "Although homocysteine accumulation is a reported risk factor for several age-related disorders, little is known on its relationship with osteoarthritis (OA) ... Circulating homocysteine and C677T variant in MTHFR are associated with the prevalence rate and ensuing progression, respectively, of spinal OA. These factors may represent potential interventional targets to prevent OA development and improve clinical outcomes" - See homocysteine formula at Amazon.com.
  • High homocysteine is associated with increased risk of colorectal cancer independently of oxidative stress and antioxidant capacities - Clin Nutr. 2013 Nov 13 - "Increased homocysteine was strongly associated with the risk of colorectal cancer independently of oxidative stress indicators and antioxidant capacities"
  • Homocysteine-related hTERT DNA demethylation contributes to shortened leukocyte telomere length in atherosclerosis - Atherosclerosis. 2013 Nov;231(1):173-179 - "Leukocyte telomere length (LTL) is shortened in patients with clinical atherosclerosis (AS) ... human telomerase reverse transcriptase (hTERT) ... hyperhomocysteinemia (HHcy) ... Hcy was negatively correlated with LTL shortening in AS patients (r = -0.179, p = 0.015) and controls (r = -0.146, p = 0.031). Serum folate and high-sensitivity C-reactive protein levels significantly interacted with Hcy in LTL shortening. Hcy was related to hTERT mRNA downregulation and promoter demethylation, which combined was associated with LTL shortening in AS patients"
  • Higher plasma homocysteine is associated with increased risk of developing colorectal polyps - Nutr Cancer. 2013 Feb;65(2):195-201 - "participants with higher plasma homocysteine [odds ratio (OR) = 1.87, 95% confidence interval (CI) = 1.13, 3.08) level exhibited significantly increased risk of colorectal polyps after adjusting for potential confounders. Plasma homocysteine was a strong predictor of the risk of colorectal polyps in participants with adequate B-vitamins status"
  • Homocysteine and the risk of nursing home admission and mortality in older persons - Eur J Clin Nutr. 2011 Nov 9 - "In men, no significant associations were observed. In women, after adjustment for confounding, the highest quartile of homocysteine was associated with a significantly higher risk of NH admission compared with the first quartile (hazard ratio (HR)=2.97, 95% confidence interval (CI)=1.36-6.49). Both women in the third and the fourth quartile of homocysteine had a significantly higher mortality risk (HR=1.70, 95% CI=1.08-2.65 and HR=1.91, 95% CI=1.22-3.00, respectively) compared with the first quartile"
  • Plasma homocysteine and cognitive decline in older hypertensive subjects - Int Psychogeriatr. 2011 May 6:1-9 - "Higher homocysteine showed an independent association with greater cognitive decline in three domains: speed of cognition (β = -27.33, p = 0.001), episodic memory (β = -1.25, p = 0.02) and executive function (β = -0.05, p = 0.04). The association with executive function was no longer significant after inclusion of folate in the regression model (β = -0.032, p = 0.22). Change in working memory and attention were not associated with plasma homocysteine, folate or B12. High homocysteine was associated with greater decline with a Cohen's d effect size of approximately 0.7 compared to low homocysteine. Conclusions: In a population of older hypertensive patients, higher plasma homocysteine was associated with cognitive decline"
  • Homocysteine levels are associated with hippocampus volume in type 2 diabetic patients - Eur J Clin Invest. 2011 Jan 20 - "Elevated total plasma homocysteine (tHcy) levels are associated with cognitive dysfunction, in which changes in the hippocampus plausibly play a pivotal role ... Our results indicate that the elevated levels of tHcy in Japanese nondementia patients with type 2 diabetes are characterised by hippocampal atrophy and insulin resistance and that the Z-score and HOMA index may be the primary factors that influence tHcy levels"
  • Homocysteine is associated with hippocampal and white matter atrophy in older subjects with mild hypertension - Int Psychogeriatr. 2010 Apr 7:1-8 - "In older hypertensives, plasma homocysteine levels are associated with increased rates of progressive white matter and hippocampal atrophy"
  • Homocysteine may be best predictor of CV risk in elderly - theheart.org, 1/8/09 - "for primary prevention, homocysteine appears to be the best predictor of cardiovascular mortality in the very elderly [1]. The research also confirms what many had already suspected—that the Framingham Risk Score (FRS) is not very accurate at predicting risk in this age group"
  • Plasma homocysteine, folate, and vitamin B12 levels in patients with laryngeal cancer - Arch Otolaryngol Head Neck Surg. 2008 Dec;134(12):1328-33 - "The mean (SD) level of total homocysteine in patients with laryngeal carcinoma was 2.84 (1.62) mg/L vs 0.99 (0.24) mg/L in the control group"
  • Hyperhomocysteinemia is a risk factor for erectile dysfunction in men with adult-onset diabetes mellitus - Urology. 2008 May;71(5):897-900 - "Hyperhomocysteinemia (HHcy) ... those with HHcy had 5.2 times the odds of vasculogenic ED compared with men without HHcy"
  • Homocysteine and diabetic retinopathy - Diabetes Care. 2007 Sep 26 - "Plasma total homocysteine concentration may be a useful biomarker and/or a novel risk factor for increased risk of diabetic retinopathy in people with type 2 diabetes"
  • Hyperhomocysteinemia: a novel risk factor for erectile dysfunction - Metabolism. 2006 Dec;55(12):1564-1568 - "Hyperhomocysteinemia, known to be an important risk factor in endothelial dysfunction, seems to be an important determinant in ED. These data suggest that slightly elevated Hcys levels are significantly related with arterial and probably endothelial dysfunction in patients with ED"
  • Biomarker For Age-related Macular Degeneration Found - Science Daily, 1/8/06 - "elevated homocysteine in the blood may be another biomarker for increased risk of AMD"
  • Erectile Trouble May Signal Heart Disease - HealthDay, 5/24/05 - "Levels of homocysteine may be a sign of how severe erectile dysfunction is ... Nutrition can influence homocysteine levels positively, and substitution with folic acid, in combination with vitamin B6 and B12, can reduce homocysteine levels significantly"
  • Homocysteine and cognitive function - Medscape, 3/25/05 - "Higher homocysteine levels were associated with worse function across a broad range of cognitive domains, and the magnitude of the associations was large. The data suggest that homocysteine may be a potentially important modifiable cause of cognitive dysfunction"
  • New Research: What is Your Optimal TSH Level? - About.com, 9/30/04 - "normalizing the TSH with a target TSH level of less than 2 mIU/mL is advisable to lower CRP levels and homocysteine levels, and possibly the cholesterol levels"
  • Metformin Treatment Leads to Increased Homocysteine, Decreased Vitamin B12 and Folate in Type 2 Diabetes Patients - Doctor's Guide, 10/20/03 - "Homocysteine requires folate and vitamin B12 to be properly metabolised, and serum vitamin B12 levels are known to decrease during metformin treatment ... compared with placebo, metformin was associated with an increase in serum homocysteine levels (4% [0.2 to 8 µmol L-1]; P=0.039), and decreases in vitamin B12 (-14% [-4.2 to -24 pmol L-1]; P<0.0001) and folate (-7%"
  • Elevated Homocysteine May Be Linked to Glaucoma - Doctor's Guide, 10/22/02 - "Hyperhomocysteinemia could be a significant risk factor for a particular type of glaucoma"
  • Long-Time Hormone Therapy Lowers Postmenopausal Homocysteine - Doctor's Guide, 8/14/02 - "long-term HRT results in lower total homocysteine concentrations in all methylenetetrahydrofolate reductase genotypes with no demonstrable difference in effect between unopposed and opposed hormone replacement therapy"