Garlic Prevents Artery Calcification and Infection

Coronary Calcium Score Benefits of Aged Garlic

Originally published on Jeffrey Dach MD.

Aged garlic shows promising effects on reducing elevated coronary calcium scores while also acting as a gut-friendly antimicrobial.

How to Reduce Calcium Scores

Jim has an elevated coronary calcium score in the 95% percentile indicating high risk for future heart attack.  He is being treated by his cardiologist with daily aspirin and atorvastatin (lipitor), a statin drug to reduce cholesterol.

Currently we are following a number of similar patients with elevated coronary calcium score treated with statin drugs by their cardiologist.  The elevated calcium score indicates higher risk for future coronary event such as chest pain, angina, heart attack etc.  Current cardiology dogma dictates treatment with statin drugs to lower cholesterol, thus preventing heart disease.

Cholesterol Theory has Been Falsified

The problem with this cardiology dogma is the cholesterol theory of atherosclerotic disease has been falsified by many studies which are summarized nicely by Dr. William R Ware from the University of Ontario.  Dr. Ware's fine article in Medical Hypotheses 2009, reveals there is no correlation between serum cholesterol and the amount of atherosclerotic plaque when reviewing either autopsy studies or coronary calcium score studies.(9)  Thus, the theory that elevated cholesterol  causes atherosclerotic plaque is essentially falsified.

Coronary Artery Calcification

Statin Drugs Disappointing for Calcium Score

Two randomized trials using statin drugs to reduce calcium scores showed  disappointing results.(10,11)  Above Image CAT scan showing calcified coronary artery (yellow arrow).

In Dr. Houslay's trial published in Heart 2006, 102 patients were randomized and treated for two years with either 80 mg/d atorvastatin (lipitor) or placebo.(10)  As expected, the statin treated group had a 53% reduction in LDL cholesterol, while the placebo group had no change in theirs.  The researchers were expecting benefit from the statin treatment.  They found the opposite.  Paradoxically, the statin group had greater increase in calcium score (26%) than the placebo group (only 18%).  The authors concluded:"statin treatment does not have a major effect on the rate of progression of coronary artery calcification."(10)

The second trial by Dr Schmermund in Circulation 2006 randomized 471 patients with no pre-existing coronary artery disease, treated for one year with either  low dose (10mg/d) or high dose (80 mg/d) atorvastatin therapy.  In the high dose group (80 mg/d) the LDL cholsterol was reduced from 106 to 87 mg/dL (approximately 20% reduction).  However, the low dose statin  group  had no change in LDL cholesterol from baseline (108 vs 109 mg/dL).   The authors were expecting reduction in progression of calcium score in the high dose statin group with a 20% reduction in LDL cholesterol.  They were surprised to find no difference in calcium scores between the two groups.  The high dose atorvastatin group actually had slightly greater progression of calcium score (27%) vs (25%) for the low dose group.  The authors concluded,"Coronary artery calcification (CAC) progression showed no relationship with on-treatment LDL cholesterol levels."  (11)

According to Dr. Gill in a 2010 report: as of the year 2010 there had been five randomized controlled studies showing that statin drug treatment does not reduce coronary calcium score.  Worse, the statin treatment showed progression of coronary calcium score indistinguishable from the non-treated placebo group.

matthew j budoff md calcium score garlic

What Interventions Have Been Successful in Reduced Calcium Score ?

As we can see from the above studies, statin drugs are quite effective for lowering cholesterol, yet fail to reduce or slow progression of calcium score.  Again, this provides even more evidence falsifying the cholesterol theory of atherosclerotic heart disease.  Perhaps we should look elsewhere for a treatment modality in the patient with elevated calcium score. Left image courtesy of Matthew J Budoff MD and OCWeekly Magazine.

Dr. Matthew J Budoff did just this, exploring the use of Aged Garlic in retarding progression of calcium score in three studies. (1-3)

In the first study published in 2006 Journal of Nutrition, twenty three "high risk" patients maintained on a stable dose of statin drug and aspirin were randomized to either placebo or 4 mL of Aged Garlic (1200 mg KYOLIC Aged Garlic Liquid) After one year of treatment, the Aged Garlic group showed a 7.5 % progression of calcium score, considerably lower than the 22.2% progression in the placebo group. (1) Remember that both groups were maintained on statin drugs during the one year study.

In the second study by Dr Budoff published in Preventive Medicine 2009, sixty five "intermediate risk" patients, all maintained on statins,  were randomized and treated for one year with either placebo or Aged Garlic Extract (250 mg). (2)  In addition, the garlic group was vitamins: Vitamin B12 (100 microg), folic acid (300 microg),Vitamin B6 (12.5 mg) and l-arginine (100 mg) . (The product used was: Kyolic 108 Aged Garlic by Wakunaga) After one year of treatment, the Aged Garlic Group had significantly less Coronary Artery Calcification progression (6.8%)  compared to the placebo group (26.5%). (see Table 2, Budoff Preventive Medicine 2009).     In addition the Garlic Group had "favorable improvement in oxidative biomarkers and vascular function"(1)

Budoff_Aged_Garlic_CAC_Fig 2_2006

Above Image: Fig 2 showing Aged Garlic Group left and placebo right.  Aged Garlic Group(left bars) shows lower progression of calcium score (blue bar), reduction in IgG IgM MDA LDL, IC/apoB oxidative bio-markers and reduction in Homocysteine (red bar) compared to placebo (right). Courtesy of Aged garlic extract retards progression of atherosclerosis Budoff Preventive medicine 2009 . 

A third study by Dr Matt Budoff  in the 2012 Journal of Cardiovascular Research randomized 65 firefighters to one year treatment with either Aged Garlic plus Co-Q-10 (Kyolic Aged Garlic-Co-Q10 Formula 110, Wakunaga ) or to placebo. (3)  Some were taking statin drugs. About 25% of the Aged Garlic+CoQ10 were on statins, compared to 31% of placebo group were on statins.

Table One Budoff 2012 Aged Garlic CoQ10 Calcium Score Firefighters_JCDR

After one year of treatment the aged Garlic group showed less progression of calcium score (32 vs. 58 absolute) and (18.9% vs 27.4%).  CRP was also lower in the Garlic group.  See Above Image :Table One courtesy Budoff 2012 (3).


Additional Benefits of Garlic

In a 2013 study by  Dr. Kumar, Garlic was found beneficial as an adjunct to Metformin 500 mg twice a day (BID) in obese diabetics.(12)  Garlic lowers blood pressure has been found useful in hypertensive patients.(13) In addition, Garlic has anti-microbial properties and has uses as an anti-microbail agent (4-8).

Garlic Reduces Calcium Score Progression, Mechanism of Action

My previous article discussed the failure of the cholesterol hypothesis, and recent revelations about atherosclerotic plaque as infected biofilm, and the association with increased gut permeability, also called "Leaky Gut".   This would certainly explain our somewhat paradoxical findings in the three studies by Dr Matthew Budoff showing Garlic more effective than statin drugs.  A natural antimicrobial agent, the lowly Garlic bulb, shows ability to retard progression of calcium score while the high and mighty statin drug fails,  even though cholesterol is reduced.

Garlic as Anti-Microbial

Although various mechanisms have been proposed to explain the benefits of Garlic in cardiovascular disease, I would like to concentrate on Garlic as an anti-microbial agent.(4-8)  Unlike conventional antibiotics which may disrupt the normal intestinal flora, Garlic's antimicrobial properties act against pathogenic gut bacteria with relative sparing of the beneficial, "friendly" gut bacteria.(4)   Dr Bayan in 2014 says: "garlic exerts a differential inhibition between beneficial intestinal microflora and potentially harmful enterobacteria"(4)   Dr Rees studied Garlic's antimicrobial activity finding broad spectrum activity against  "many  bacteria, yeasts, fungi and virus. All microorganisms tested were susceptible to garlic."(5)  Dr Filocamo in 2012 studied Garlic in a bacterial population representative of the colonic microbiota.   Lacto-baccillus was more resistant to Garlic compared to the Clostridial which was was more susceptible.   The author suggested the "consumption (of garlic) may favor the growth of these beneficial bacterial species in the gut. Garlic intake has the potential to temporarily modulate the gut microbiota."(6)  A full discussion of the antimicrobial spectrum of Garlic can be found in an excellent article in 2015 by Dr Packia Lekshmi  (7) Mark Slevin's  2012 article  reported on natural products with vascular protective properties and significant anti-atherogenic potential.  Dr Slevin mentions Aged Garlic, Resveratrol and Green Tea extract (ECGC ) as the most promising (8)

Pseudomonas BioFilm in Atherosclerotic Plaque Material

Dr Bernard Lanter studied athersclerotic plaque specimens, identifying Pseudomonas 16S rRNA genes in 6 of 15 cases, indicating colonization by Pseudomonas biofims. (14) The virulence of Pseudomonas is attributed to Quorum Sensing, the ability of the bacterial cells to communicate with one another to form Bio-Films. (16) Dr. Bjarnsholt considers disruption of this Quorum Sensing to be the key to controlling Pseudomonas Biofilm infections.  That is exactly what Garlic does.  In Vitro and In Vivo animal studies show Garlic inhibits quorum sensing and virulence of Pseudomonas. (15)  An excellent way to study the effect of Allicin, the active ingredient in Garlic, on the Pseudomonas organism is to tag the bacteria with the Green Flourscent Protein (GFP).  This was done published in the 2013 with an elegant series of in-vitro experiments using Allicin treated GFP-modified Pseudomonas organisms.(17) Dr. Lihua's group showed that:

Allicin treatment not only reduced the adhesion ratio of P. aeruginosa, but also inhibited EPS (extracellular polysaccharide) secretion and down-regulates production of some Quorum Sensing -controlled virulence factors.  These results imply that allicin can disturb the formation and
maturation of P. aeruginosa biofilm, and suggest that allicin may represent a promising therapeutic candidate for the management of P. aeruginosa biofilms.(17)

Poly-Microbial Colonization

Others have found diverse colonies of bacterial, fungal and protozoal life-forms colonizing biofilms in atherosclerotic plaque specimens (18-20),  In view of this,  investigating other botanical agents with known antimicrobial activity might also be useful, such as Olive Leaf extract, Oregano Oil, Berberine, etc.   Perhaps a combination of such natural products would have a more powerful synergistic effect. Other natural anti-microbials such as colloidal silver, and Iodine should be considered as well.   This would be a fertile area for future research.

Our program for Elevated Calcium Score:

Aged Garlic,
Reveratrol, Pterostilbene
Homocysteine reducing program (B6, B12, Methylfolate)
LinusPauling Protocol (Lysine, Proline, Vitamin C, Tocotrienols)
William Davis Track Your Plaque Protocol (Niacin, Omega-3 Fish Oil, Vitamin D3, Vitamin K2, Eliminate Wheat products)
Weight Reduction,
Hormone Optimization (optimize thyroid, testosterone, estrogen progesterone)
Heal the Leaky Gut (Probiotics, Glutamine, Colostrum)
Eliminate NSAIDS, PPI's which cause dysbiosis and leaky gut.
Eliminate Pesticides,  Glyphosate and GMO food, eat Organic.

Articles With related Interest:

Atherosclerotic Plaque as Infected Biofilm

Preventing Heart Attacks with Ouabain

Thyroid Pills Prevent Heart Attacks

How to Reverse Heart Disease with the Coronary Calcium Score

Heart Disease Vitamin C and Linus Pauling

Links and References

Budoff, Matthew. "Aged garlic extract retards progression of coronary artery calcification." The Journal of nutrition 136.3 (2006): 741S-744S. Aged garlic extract retards progression of atherosclerosis Budoff Preventive medicine 2009

Budoff, M. J., et al. "Aged garlic extract supplemented with B vitamins, folic acid and L-arginine retards the progression of subclinical atherosclerosis: a randomized clinical trial." Preventive medicine 49.2-3 (2009): 101.
Previous studies demonstrated that aged garlic extract reduces multiple cardiovascular risk factors. This study was designed to assess whether aged garlic extract therapy with supplements (AGE+S) favorably affects inflammatory and oxidation biomarkers, vascular function and progression of atherosclerosis as compared to placebo.
METHODS: In this placebo-controlled, double-blind, randomized trial (conducted 2005-2007), 65 intermediate risk patients (age 60+/-9 years, 79% male) were treated with a placebo capsule or a capsule containing aged garlic extract (250 mg) plus Vitamin B12 (100 microg), folic acid (300 microg), Vitamin B6 (12.5 mg) and l-arginine (100 mg) given daily for a 1 year. All patients underwent coronary artery calcium scanning (CAC), temperature rebound (TR) as an index of vascular reactivity using Digital Thermal Monitoring (DTM), and measurement of lipid profile, autoantibodies to malondialdehyde (MDA)-LDL, apoB-immune complexes, oxidized phospholipids (OxPL) on apolipoprotein B-100 (OxPL/apoB), lipoprotein (a) [Lp (a)], C-reactive protein (CRP), homocysteine were measured at baseline and 12 months. CAC progression was defined as an increase in CAC>15% per year and an increase in TR above baseline was considered a favorable response.
RESULTS: At 1 year, CAC progression was significantly lower and TR significantly higher in the AGE+S compared to the placebo group after adjustment of cardiovascular risk factors (p<0.05). Total cholesterol, LDL-C, homocysteine, IgG and IgM autoantibodies to MDA-LDL and apoB-immune complexes were decreased, whereas HDL, OxPL/apoB, and Lp (a) were significantly increased in AGE+S to placebo.
CONCLUSION: AGE+S is associated with a favorable improvement in oxidative biomarkers, vascular function, and reduced progression of atherosclerosis.

Zeb, Irfan, Budoff M  et al. "Aged Garlic Extract and Coenzyme Q10 Have Favorable Effect on Inflammatory Markers and Coronary Atherosclerosis Progression: A Randomized Clinical Trial." Journal of Cardiovascular Disease Research 3.3 (2012): 185–190. PMC. Web. 11 June 2015.
Aged garlic extract (AGE) and coenzyme Q10 (CoQ10) have been shown to affect multiple cardiovascular risk factors. The current study evaluates the effect of AGE combined with CoQ10 on inflammatory markers and progression of coronary atherosclerosis compared with placebo.
Methods and Results: In this placebo-controlled, double-blind, randomized trial, 65 intermediate risk firefighters (age 55 ± 6 years) were treated with a placebo capsule or a capsule containing AGE and CoQ10 (AGE+CoQ10, 1200 and 120 mg, respectively) daily for 1 year. All participants underwent coronary artery calcium (CAC) scanning and C-reactive protein (CRP) at baseline and at 12 months. At 1 year, mean CAC progression was significantly lower in AGE+CoQ10 (32 ± 6 vs. 58 ± 8, P = 0.01) than placebo. Similarly, CRP were significantly decreased in AGE+CoQ10 compared with placebo (-0.12 ± 0.24 vs. 0.91 ± 0.56 mg/L, P < 0.05). After adjustment for age, gender, conventional cardiac risk factors, and statin therapy, AGE+CoQ10 was associated with 3.99 fold (95% 1.3–12.2, P = 0.01) lack of CAC progression compared with the placebo.

Bayan, Leyla, Peir Hossain Koulivand, and Ali Gorji. "Garlic: A Review of Potential Therapeutic Effects." Avicenna Journal of Phytomedicine 4.1 (2014): 1–14. Print.
It has been documented that garlic exerts a differential inhibition between beneficial intestinal microflora and potentially harmful enterobacteria

World J Microbiol Biotechnol. 1993 May;9(3):303-7. doi: 10.1007/BF00383068.
A quantitative assessment of the antimicrobial activity of garlic (Allium sativum).
Rees LP1, Minney SF, Plummer NT, Slater JH, Skyrme DA.
An aqueous extract of freeze-dried garlic (Allium sativum), when incorporated into growth media, inhibited many representative bacteria, yeasts, fungi and a virus. All microorganisms tested were susceptible to garlic. Quantitative assessment of the minimum inhibitory concentrations for bacteria and yeasts showed values ranging from 0.8 to 40.0 mg garlic ml(-1). Fungal radial colony growth was inhibited by at least 25% at concentrations as low as 2.0 mg garlic ml(-1). The 50% endpoint neutralization titre for rotavirus was 2.4 to 2.8 μg ml(-1). Lactic acid bacteria were the least sensitive microorganisms to the inhibitory effects of garlic. In mixed culture studies of Lactobacillus acidophilus and Escherichia coli, garlic prevented the establishment of E. coli, although the final outcome of competition was not affected.

Filocamo, Angela, et al. "Effect of garlic powder on the growth of commensal bacteria from the gastrointestinal tract." Phytomedicine 19.8 (2012): 707-711.
Garlic (Allium sativum) is considered one of the best disease-preventive foods. We evaluated in vitro the effect of a commercial garlic powder (GP), at concentrations of 0.1% and 1% (w/v), upon the viability of representative gut bacteria. In pure culture studies, Lactobacillus casei DSMZ 20011 was essentially found to be resistant to GP whereas a rapid killing effect of between 1 and 3 log CFU/ml reduction in cell numbers was observed with Bacteroides ovatus, Bifidobacterium longum DSMZ 20090 and Clostridium nexile A2-232. After 6h incubation, bacterial numbers increased steadily and once the strains became resistant they retained their resistant phenotype upon sub-culturing. A colonic model was also used to evaluate the effect of GP on a mixed bacterial population representing the microbiota of the distal colon. Lactic acid bacteria were found to be more resistant to GP compared to the clostridial members of the gut microbiota. While for most bacteria the antimicrobial effect was transient, the lactobacilli showed a degree of resistance to garlic, indicating that its consumption may favour the growth of these beneficial bacterial species in the gut. Garlic intake has the potential to temporarily modulate the gut microbiota.

7) Antimicrobial Spectrum Allium Garlic Packia Lekshmi 2015
Packia Lekshmi, N. C. J., et al. "Antimicrobial Spectrum of Allium Species–A Review." History 15.44 (2015): 1-5.

8) pdf vascular protective supplements anti_atherosclerotic Slevin Mark Vasc Cell 2012  .  Slevin, Mark, et al. "Unique vascular protective properties of natural products: supplements or future main-line drugs with significant anti-atherosclerotic potential." Vasc Cell 4.1 (2012): 9.

9) cholesterol atherosclerosis falsified coronary artery plaque Ware Medical Hypotheses 2009 Ware, William R. "The mainstream hypothesis that LDL cholesterol drives atherosclerosis may have been falsified by non-invasive imaging of coronary artery plaque burden and progression." Medical hypotheses 73.4 (2009): 596-600.

10)  Houslay, E S et al. "Progressive Coronary Calcification despite Intensive Lipid‐lowering Treatment:A Randomised Controlled Trial." Heart 92.9 (2006): 1207–1212. PMC. Web. 11 June 2015.
To evaluate the effect of intensive lipid‐lowering treatment on coronary artery calcification in a substudy of a trial recruiting patients with calcific aortic stenosis.
Methods In a double blind randomised controlled trial, 102 patients with calcific aortic stenosis and coronary artery calcification were randomly assigned by the minimisation technique to atorvastatin 80 mg daily or matched placebo. Coronary artery calcification was assessed annually by helical computed tomography.
Results 48 patients were randomly assigned to atorvastatin and 54 to placebo with a median follow up of 24 months (interquartile range 24–30). Baseline characteristics and coronary artery calcium scores were similar in both groups. Atorvastatin reduced serum low density lipoprotein cholesterol (−53%, p < 0.001) and C reactive protein (−49%, p < 0.001) concentrations whereas there was no change with placebo (−7% and 17%, p > 0.95 for both). The rate of change in coronary artery calcification was 26%/year (0.234 (SE 0.037) log arbitrary units (AU)/year; n  =  39) in the atorvastatin group and 18%/year (0.167 (SE 0.034) log AU/year; n  =  49) in the placebo group, with a geometric mean difference of 7%/year (95% confidence interval −3% to 18%, p  =  0.18). Serum low density lipoprotein concentrations were not correlated with the rate of progression of coronary calcification (r  =  0.05, p  =  0.62).
Conclusion In contrast to previous observational studies, this randomised controlled trial has shown that, despite reducing systemic inflammation and halving serum low density lipoprotein cholesterol concentrations, statin treatment does not have a major effect on the rate of progression of coronary artery calcification.

11)  Schmermund, Axel, et al. "Effect of Intensive Versus Standard Lipid-Lowering Treatment With Atorvastatin on the Progression of Calcified Coronary Atherosclerosis Over 12 Months A Multicenter, Randomized, Double-Blind Trial." Circulation 113.3 (2006): 427-437.

Background— Recent clinical trials have suggested that intensive versus standard lipid-lowering therapy provides for additional benefit. Electron-beam computed tomography provides the opportunity to quantify the progression of coronary artery calcification (CAC) in serial measurements.
Methods and Results— In a multicenter, randomized, double-blind trial, 471 patients (age 61±8 years) who had no history of coronary artery disease and no evidence of high-grade coronary stenoses (>50% diameter reduction) were randomized if they had ≥2 cardiovascular risk factors and moderate calcified coronary atherosclerosis as evidenced by a CAC score ≥30. Patients were assigned to receive 80 mg or 10 mg of atorvastatin per day over 12 months. Progression of CAC volume scores could be analyzed in 366 patients. After pretreatment with 10 mg of atorvastatin for 4 weeks, 12 months of study medication reduced LDL cholesterol from 106±22 to 87±33 mg/dL in the group randomized to receive 80 mg of atorvastatin (P<0.001), whereas levels remained stable in the group randomized to receive 10 mg (108±23 at baseline, 109±28 mg/dL at the end of the study, P=NS). The mean progression of CAC volume scores, corrected for the baseline CAC volume score, was 27% (95% CI 20.8% to 33.1%) in the 80-mg atorvastatin group and 25% (95% CI 19.1% to 30.8%) in the 10-mg atorvastatin group (P=0.65). CAC progression showed no relationship with on-treatment LDL cholesterol levels.

12) Kumar, Rahat et al. "Antihyperglycemic, Antihyperlipidemic, Anti-Inflammatory and Adenosine Deaminase– Lowering Effects of Garlic in Patients with Type 2 Diabetes Mellitus with Obesity.Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy 6 (2013): 49–56. PMC. Web. 12 June 2015.

13) Xiong, X. J., et al. "Garlic for hypertension: A systematic review and meta-analysis of randomized controlled trials." Phytomedicine 22.3 (2015): 352-361.

14) Lanter, Bernard B., Karin Sauer, and David G. Davies. "Bacteria present in carotid arterial plaques are found as biofilm deposits which may contribute to enhanced risk of plaque rupture." MBio 5.3 (2014): e01206-14.

15) Harjai, K., R. Kumar, and S. Singh. "Garlic blocks quorum sensing and attenuates the virulence of Pseudomonas aeruginosa." FEMS immunology and medical microbiology 58.2 (2010): 161.

16) Bjarnsholt, Thomas, and Michael Givskov. "The role of quorum sensing in the pathogenicity of the cunning aggressor Pseudomonas aeruginosa." Analytical and bioanalytical chemistry 387.2 (2007): 409-414.


17) Allicin_Pseudomonas_BioFilm_Quorum-Sensing Microbiology Lihua 2013

Lihua, Lin, et al. "Effects of allicin on the formation of Pseudomonas aeruginosabiofinm and the production of quorum-sensing controlled virulence factors." Pol J Microbiol 62 (2013): 243-51.


18)  Ott, Stephan J., et al. "Detection of diverse bacterial signatures in atherosclerotic lesions of patients with coronary heart disease." Circulation 113.7 (2006): 929-937.

19) Ott, S. J., et al. "Fungal rDNA signatures in coronary atherosclerotic_Ott_2007_Athrosclerosis  Fungal rDNA signatures in coronary atherosclerotic plaques." Environmental microbiology 9.12 (2007): 3035-3045.

20)  Putative biofilm-forming organisms in the human vasculature: expanded case reports and review of the literature. Stephen Eugene Fry, Jeremy Eugene Ellis, Matthew Andrew Shabilla, Delyn Lorene Martinez, Renatta Schwarz, Richard Heuser, Constantine Moschonas . Phlebological Review 2014; 22, 1: 24–37 Biofilm_forming organisms human vasculature Stephen Eugene Fry Phlebological Review 2014

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of GreenMedInfo or its staff.

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Garlic Reduces Plaque Area in Genetically Modified Mice

Garlic Reduces Plaque in Genetically Modified Mice

Ayelet GonenOne might say the benefits of Garlic on slowing calcium score progression are nice, but what about preventing plaque formation itself?  This question was studied in atherosclerotic mice by Ayelet Gonen’s group at the Institute of Lipid and Atherosclerosis Research, Sheba Medical Center, Tel Hashomer Israel.  Dr. Gonen studied the effect of daily Allicin treatment (the active ingredient in Garlic)  in mice genetically modified to form atherosclerotic plaque in the aortic sinus.  These were Apo-E knockout  mice, and LDL receptor knockout mice.   Daily allicin (9 mg/kg) reduced the atherosclerotic plaque area by 70% in apoE-deficient mice and by 60% in LDL receptor knockout mice.(21)  This is rather impressive. They went further, showing allicin binds directly to the LDL particle preventing LDL oxidation, and inhibits macrophage uptake and degradation of the LDL particles. This, they speculated , was the mechanism for atherosclerosis prevention. Left Image courtesy of Ayelet Gonen

Garlic and Atherosclerotic Plaque Regression –  Ayelet Gonen

Gonen Ayelet 2005 Allicin AntiAtherosclerosis Pathobiology Fig 1

Above image Fig. 1. Allicin reduced the atherosclerotic lesion area in aortic sinus.   Stained sections showing plaque (red arrows) from apoE knockout mice (A Allicin treated, B placebo treated)  Courtesy of Antiatherogenic effect of allicin Pathobiology 2005 Gonen.

Future Research

As mentioned above, independent researchers have found polymicrobial organisms colonizing biofilms in atherosclerotic plaque.

One question I have is this: Why not conduct a series of experiments using these same  techniques to look for infected biofilms in the atherosclerotic plaque material in animal models of atherosclerosis ?   Perhaps the Institute of Lipid and Atherosclerosis Research might share mouse plaque specimens with the labs of Drs. Fry, Lanter and Ott.  This could answer important questions.  What is the timing of the infection in the plaque? Is infection a prerequisite for plaque formation. Does infection seed the plaque later ?   Exactly when in the life cycle of the atherosclerotic plaque does the infection occur? Is the explanation for Garlic as a preventive agent due to preventing LDL oxidation and inhibiting macrophage uptake as Dr Gonen speculates ? Or does infection also play a role in these supposedly “pristine” animal models of knockout mice genetically bred to form atherosclerosis ?   These and other question could be answered by studying plaque from animal models using the 16s RNA cloning and flourescent imaging techniques used in Dr Lanter, Ott and Fry’s labs.

jeffrey dach md

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