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The lymphatic network is a unidirectional and low-pressure vascular system that is responsible for the absorption of interstitial fluids, molecules, and cells from the peripheral tissue, including the skin and the intestines. Targeting the lymphatic route for drug delivery employing traditional or new technologies and drug formulations is exponentially gaining attention in the quest to avoid the hepatic first-pass effect.
Condition |
Intervention and Identifier |
Target |
Dose and Outcome |
---|---|---|---|
Diabetes |
Metformin |
From 500 to 850 mg, 2–3 times a day, during the meal [29] |
|
Diabetes |
Sulfonylureas Meglitinide |
Dosage is very different from one class of medication to another [30] |
|
Diabetes |
Acarbose, Miglitol Voglibose |
Carbohydrate digesting enzymes in the brush border |
50 mg three times daily (up to 100 mg) [31] |
Diabetes |
Rosiglitazone Pioglitazone |
PPAR-α |
Rosiglitazone: 4 mg per day (up to 8 mg) Pioglitazone: 15–30 mg per day [32] |
Diabetes |
Sitaglipin Vildaglipin Saxaglipin Linaglipin Aloglipin |
DPP4 |
2.5–100 mg once daily depending on the inhibitor used [33] |
Diabetes |
Dapagliflozin Canagliflozin Empagliflozin |
SGLTP2 |
Dapagliflozin: 2.5–10 mg daily Canagliflozin: 100–300 mg Empagliflozin: 5–25 mg daily [34] |
Diabetes |
AG019 (NCT03751007) or in combination with the anti-CD3 monoclonal antibody teplizumab |
2 or 6 capsules per day for 8 weeks (repeated dose) or for one day (single dose) |
|
Diabetes |
Insulin nanocarriers |
Protection of insulin from enzymatic degradation Enhancement of stability, intestinal permeability, and bioavailability [17] |
|
Diabetes |
Electrostatically-complexed insulin with partially uncapped cationic liposomes |
Improved insulin pharmacokinetic profile [35] |
|
Diabetes |
Insulin-loaded PLGA |
Improved bioavailability and sustained hypoglycemic effect [36] |
|
Diabetes |
Exenatide combined to phase-changeable nanoemulsion with medium-chain fatty acid |
Enhancement of intestinal absorption and lymphatic transport [37] |
|
HTN |
Prazosine Terazosine Doxazosine |
Alpha-adrenergic receptor |
Prazosine: 3–7.5 mg per day in two doses Terazosine: 1–9 mg per day in the evening at bedtime Doxazosine: 4 mg per day [38] |
HTN |
Clonidine Methyldopa |
Alpha-adrenergic receptor (agonists) |
Clonidine: 0.1 mg twice daily [39] Methydopa: 250 mg two to three times daily [40] |
HTN |
Carvedilol into nanoemulsion |
Beta-adrenergic receptors |
Significant improvement in its absorption, permeability, and bioavailability [41][42] |
HTN |
Valsartan, Ramipril and Amlodipine into nanoemulsion |
Enhanced solubility, oral bioavailability, and pharmacological outcome [43] |
|
HTN |
Felodipine-loaded PLGA nanoparticles |
Calcium-channel |
Sustained drug release both in vitro and ex vivo [44] |
MI HF HTN Arrhythmia |
ß-blocker |
Beta-adrenergic receptors |
Acebutol: 200 mg twice daily [45] |
MI HF HTN |
Conversion enzyme inhibitors |
Conversion enzyme |
Captopril: 100 mg per day [46] |
MI HF HTN |
Valsartan Losartan |
Angiotensin II |
20 mg twice a day, up to 160 mg [47] |
HF HTN |
Hydrochlorothiazide Bumetanide |
Angiotensin/neprilysin receptor |
49 mg/51 mg twice daily and doubled after 2–4 weeks [48] |
HF HTN |
Sacubitril Valsartan |
Calcium channel |
5–10 mg daily [49] 60 mg three times daily [50] |
HTN Arrhythmia |
Amlodipine Diltiazem |
Calcium channel |
5–10 mg daily [49] 60 mg three times daily [50] |
HF |
Ivabradine |
Bradycardic 5–7.5 mg twice a day [51] |
|
HF MI |
Eplerenone Spironolactone |
Aldosterone |
|
HF Arrhythmia |
Digoxin |
0.25 mg once daily [54] |
|
HF MI HCL |
Statin |
HMG-CoA |
10 mg once daily [55] |
MI |
Aspirin |
Platelets |
325 mg, then 81 mg per day [56] |
MI |
Clopidogrel Prasugrel Ticagrelor |
Platelets |
300 mg, then 75 mg daily with aspirin 60 mg, then 10 mg daily |
HCL |
Ezetimibe |
Intestinal cholesterol absorption |
10 mg once daily [59] |
HLD |
Tricor Triglide |
Fenofibrates 100–300 mg per day [60] |
|
HCL HLD |
Atorvastatin formulated into ethylcellulose nanoparticles |
Enhanced atorvastatin’s lymphatic absorption and oral bioavailability [61] |
|
HCL HLD |
Atorvastatin formulated into nanocrystals prepared with poloxamer 188 |
Improved atorvastatin’s gastric solubility and bioavailability [62] Reduced circulating cholesterol, TG and LDL |
|
HCL HLD |
Atorvastatin formulated into polycaprolactone nanoparticles |
Enhanced atorvastatin’s bioavailability [63] |
|
HCL HLD |
Nanostructured lipid carriers |
Enhanced atorvastatin bioavailability by 2.1 fold compared to the commercial product: lipitor® Reduced the serum level of cholesterol, TG and LDL [64] |
|
HCL HLD |
Nanoemulsion |
Increased the bioavailability of atorvastatin compared to the commercial tablet ozovasTM [65] |
|
HCL HLD |
Simvastatin Rosuvastatin Fluvastatin Fibrates Ezetimibe lipid-based nanoparticles |
Improved bioavailability via lymphatic uptake [66][67][68][69][70][71][72][73][74] |
PPAR- α: peroxisome proliferator-activated receptor- α; DPP4: dipeptidyl peptidase-4; SGLTP2: Sodium glucose co-transporter-2; PLGA: Poly lactic-co-glycolic acid; HTN: Hypertension; MI: Myocardial infarction; HF: Heart failure; HCL: Hypercholesterolemia; HMG-CoA reductase: Hydroxymethyl glutaryl coenzyme A reductase; HLD: Hyperlipidemia; TG: Triglycerides; LDL: Low density lipoprotein.
Condition |
Intervention and Identifier |
Therapy |
Target |
Stage and Status |
Dose and Outcome |
---|---|---|---|---|---|
Diabetes |
Insulin |
Different types of insulin At least 3 injections per day Dosage adapted to the patient [76] |
|||
Diabetes |
Exenatide Lixisenatide Liraglutide Exenatide LAR Albiglutide Dulaglutide |
GLP-1 analogues [77] Exenatide: 5–10 µg twice a day Lixisenatide: 10–20 µg once daily Liraglutide: 0.6–1.8 mg once daily Exenatide LAR: 2 mg once a week Albiglutide: 30–50 mg once a week Dulaglutide: 0.75–1.5 mg once a week |
|||
Diabetes |
Vaccine formed of virus-like particles coupled to IAPP |
Against the insoluble IAPP- derived amyloid aggregates |
Three doses—10 µg Strong immune response against these aggregates and restored insulin production Diminished the amyloid deposits in the pancreatic islets, reduced the level of the pro-inflammatory cytokine IL-1β, and reprieved the onset of amyloid-induced hyperglycemia [78] |
||
Diabetes |
IL-1β epitope peptide |
Against IL-1β |
Three doses—50 µg Enhancement glucose tolerance, improved insulin sensitivity, restored β-cell mass, reduced β-cell apoptosis, and enhanced β-cell proliferation, as well as downregulation of IL-1β expression and inhibition of the inflammatory activity [79][80] |
||
Diabetes |
hIL1bQb vaccine (NCT00924105) |
Against IL-1β |
Six doses—300 µg Mediated a dose-dependent IL-1β-specific antibody response More studies are required to precisely investigate the clinical efficiency of this vaccine [81] |
||
Diabetes |
Neutralizing antibodies against DPP4 |
The GLP-1 and GIP inhibitor, DPP4 |
Five doses—2–20 µg Increased pancreatic and plasma insulin level and improved postprandial blood glucose level [82] |
||
HTN |
hR32 vaccine |
Renin-derived peptide |
Five doses—500 µg Reduced systolic blood pressure by 15 mmHg [83] |
||
HTN |
Angiotensin I vaccine (PMD3117) |
Three or four doses—100 µg The vaccine failed to reduce the blood pressure [84] |
|||
HTN |
AngI-R vaccine |
Modifiedendogenous angiotensin I peptide |
Four doses—50 µg 15 mmHg reduction in systolic blood pressure and reduced angiotensin I/II level [85] |
||
HTN |
ATRQβ-001 |
Angiotensin II type I receptors |
Two doses—100 µg Protective role against target organ damage induced by hypertension [86] |
||
HTN |
ATR12181 vaccine |
Angiotensin II type I receptors |
Nine doses—0.1 mg Attenuated the development of hemodynamic alterations of hypertension [87] |
||
HTN |
CYT006-AngQb vaccine |
Against angiotensin II |
100 or 300 µg Reduction in blood pressure and reduced ambulatory daytime blood pressure [88] |
||
HF HTN |
Ang II-KLH vaccine |
Angiotensin II |
Three doses—5 µg Suppressed post-MI cardiac remodeling and improved cardiac function [89] |
||
MI |
Celecoxib loaded in nanoparticles |
Promoted vascularization in the ischemic myocardium and delayed HF progression [90] |
|||
MI |
Chitosan-hyaluronic acid based hydrogel containing deferoxamine-PLGA nanoparticles |
Persistent neovascularization in mice [91] |
|||
HCL |
Alirocumab Evolocumab |
PCSK9 |
|||
HCL |
Inclisiran |
PCSK9 |
Two doses per year [94] |
||
HoFH HeFH severe HCL |
Mipomersen (NCT00607373) (NCT00706849) (NCT00770146) (NCT00794664) |
ASO |
ApoB |
Approved |
200 mg once/week. Phase III: reduction in LDL-C [95] |
ASCVD HCL HeFH |
Inclisiran (NCT03399370) (NCT03400800) (NCT03397121) |
siRNA |
PCSK9 |
Approved |
284 mg inclisiran, injected on day 1, day 90 and then twice/year |
FCS |
Volanesorsen (NCT02211209) |
ASO |
ApoC3 |
Approved |
300 mg once/week Phase III: reduction in mean plasma APOC3 and TG level [97] |
Elevated LP(a) |
ISIS-APO(a)Rx (NCT02160899) |
ASO |
APO(a) |
Phase II (Complete) |
Multiple escalating (100–300 mg) doses, injected on a weekly interval for 4 weeks each Phase I/II: reduction in plasma Lp(a) concentration [98] |
Elevated LP(a) CVD |
AKCEA-APO(a)-LRx (NCT03070782) (NCT02414594) (NCT04023552) |
GalNAc3 conjugated-ASO |
APO(a) |
Phase III (Recruiting) |
80 mg administered monthly Phase I/II: reduction in plasma Lp(a) [98] |
HTG CVD FCS |
AKCEA-APOCIII-LRx (NCT02900027) (NCT03385239) (NCT04568434) |
GalNAc3 conjugated-ASO |
APOC3 |
Phase III (Recruiting) |
Multiple dosing injected as once/4 weeks for up to 49 weeks Phase II: reduction in ApoC3 and TG levels [99] |
HTG FH HLP |
Vupanorsen (NCT02709850) (NCT04459767) (NCT04516291) |
ASO |
ANGPTL3 |
Phase IIb (Active, Not recruiting) |
Multiple escalating dosing (60–160 mg, once/2 or 4 weeks) Phase I: reduction in TG and LDL-C levels [100] |
HCL |
Neutralizing antibodies against PCSK9 |
PCSK9 |
Three doses—5–50 µg Long-lasting reduction in the level of total cholesterol, VLDL and chylomicron [101] |
||
HCL |
AT04A |
PCSK9 |
Five doses Strong and persistent anti-PCSK9 antibody production, reduced plasma cholesterol level, attenuated progression of atherosclerosis and reduced vascular and systemic inflammation [102] |
||
HCL |
AT04A |
PCSK9 |
Four doses—15 µg and 75 µg Reduced serum LDL-C level and elevated anti-PCSK9 antibody titer [103] |
||
HCL |
A peptide representing the mouse ANGPTL3 |
Angiopoietin-like proteins 3 (ANGPTL3) |
Three doses—5 µg Reduced steady-state plasma TGs and promoted LPL activity |
GLP-1: glucagon-like peptide-1; IAPP: Islet amyloid polypeptide; DPP4: dipeptidyl peptidase-4; GIP: glucose-dependent insulinotropic polypeptide; HTN: Hypertension; HF: Heart failure; MI: Myocardial infarction; HCL: Hypercholesterolemia; HoFH: Homozygous familial hypercholesterolemia; HeFH: Heterozygous familial hypercholesterolemia; AngII-KLH: Angiotensin II—keyhole-limpet hemocyanin; PCSK9: Proprotein convertase subtilisin/kexin type 9; ASO: Antisense oligonucleotides; ApoB: Apolipoprotein B; LDL-C: low density lipoprotein cholesterol; ASCVD: Atherosclerotic cardiovascular disease; FCS: Familial chylomicronemia syndrome; TG: Triglycerides; LP(a): Lipoprotein(a); APO(a): Apolipoprotein (a); CVD: Cardiovascular diseases; GalNAc3: Triantennary N-acetyl galactosamine; HTG: Hypertriglyceridemia; FH: Familial hypercholesterolemia; HLP: Hyperlipoproteinemia; ANGPTL3: Angiopoietin-like proteins 3; VLDL: Very low density lipoprotein; LPL: Lipoprotein lipase.
Condition |
Intervention and Identifier |
Target |
Dose and Outcome |
---|---|---|---|
Diabetes |
Proinsulin peptide vaccine C19-A3 |
CD4 T cells |
Three equal doses—10–100 µg Vaccine was well tolerated [111] |
Diabetes |
C19-A3 (NCT02837094) |
CD4 T cells |
Three doses—10 ug In vitro and ex vivo studies of in human skin reported rapid diffusion of the injected particles through the skin layers and preferential uptake by Langerhans cells in the epidermis, which have a primary role in the tolerance mechanism [112] |
Diabetes |
PIpepTolDC vaccine (NCT04590872) |
Tolerogenic DC Vaccine |
One dose and another after 28 days No results yet, but, it is believed to be able to produce proinsulin-specific Treg [113] |
Condition |
Intervention and Identifier |
Target |
Dose and Outcome |
---|---|---|---|
Diabetes |
Preproinsulin-encoding plasmid DNA |
Pancreatic islets |
40% higher survival rate as compared to the control group [119] |
HTN |
CoVaccine HT (NCT00702221) |
Against angiotensin II |
Three doses Terminated in 2016 due to dose-limiting adverse effects |
HTN |
AGMG0201 vaccine |
Against angiotensin II |
High or low dose (0.2 mg plasmid DNA and 0.5 or 0.25 mg Ang II-KLH conjugate) Ongoing |
ACS HF CVD |
Inactivated influenza vaccine |
Less frequent hospitalization from ACS, hospitalization from HF and stroke [120] |
|
MI |
Influenza vaccine |
Risk of cardiovascular-related death was significantly lower [121] |
|
CVD MI |
Pneumococcal vaccines |
Reduced incidence of cardiovascular events and mortality Reduced risk of MI in the elderly [122] |
|
MI HF Stroke |
Influenza vaccine (NCT02831608) |
The primary endpoints: death, new MI and stent thrombosis Secondary endpoints: patients with hospitalization for HF |
HTN: Hypertension; AngII-KLH: Angiotensin II—keyhole-limpet hemocyanin; ACS: Acute coronary syndrome; CVD: cardiovascular disease; HF: Heart failure; MI: Myocardial infarction.
Condition |
Intervention and Identifier |
Therapy |
Target |
Stage and Status |
Dose and Outcome |
---|---|---|---|---|---|
HF |
Ad5.hAC6 (NCT007) |
Ad5 |
AC6 |
Phase I/II (Completed) |
Single administration of escalating doses (3.2 × 109 vp to 1012 vp) Phase II: Reduced HF admission rate. Enhanced left ventricular function beyond the optimal HF therapy following a single administration [126] |
HF |
Ad5.hAC6 (NCT03360448) |
Ad5 |
AC6 |
Phase III (withdrawn) |
Phase III: withdrawn for re-evaluation |
HF |
MYDICAR (NCT00454818) |
AAV1 |
SERCA2a |
Phase I/II (Completed) |
Single administration of escalating doses (1.4 × 1011–1 × 1013 DRP of AAV1/SERCA2a) Phase I/II (CUPID): high-dose treatment resulted in increased time and reduced frequency of cardiovascular events within a year and reduced cardiovascular hospitalizations [127] |
HF |
MYDICAR (NCT01643330) |
AAV1 |
SERCA2a |
Phase IIb (completed) |
Single infusion of 1 × 1013 DRP of AAV1/SERCA2a Phase IIb (CUPID-2b): no improvement was observed at the tested dose in patients with HF during the follow-up period [125] |
HF |
MYDICAR (NCT01966887) |
AAVI |
SERCA2a |
Phase II (Terminated) |
1 × 1013 DRP of AAV1/SERCA2a as a single intracoronary infusion Phase II: no improvement observed in the ventricular remodeling.The study terminated driven by the CUPID-2 trial neutral outcome [128] |
HF |
SRD-001 (NCT04703842) |
AAVI |
SERCA2a |
Phase I/II (Active, not recruiting) |
Single administration of 3 × 1013 vg CUPID-3: aims to investigate the safety and efficacy of SRD-001 in anti-AAV1 neutralizing antibody-negative subjects with HFrEF |
HF CVD |
INXN-4001 (NCT03409627) |
Non-viral, triple effector plasmid |
SDF-1α, S100A1, VEGF-165 |
Phase I (Completed) |
Single 80 mg dose, given in 40 mL or 80 mL at a rate of 20 mL/min Phase I: an improvement in the quality of life in 50% of patients was reported [129] |
HF |
ACRX-100 (NCT01082094) |
Plasmid DNA |
SDF-1 |
Phase I (Completed) |
Single escalating doses, injected at multiple sites Preclinical studies: enhanced vasculogenesis and improved cardiac function reported with all doses [130] |
HF |
JVS-100 (NCT01643590) |
Plasmid DNA |
SDF-1 |
Phase II (Completed) |
Single injection of escalating doses (15 and 30 mg) Phase II (STOP-HF): JVS-100 showed potential to improve cardiac function through reducing left ventricular remodeling and improving ejection fraction [131] |
HF |
JVS-100 (NCT01961726) |
Plasmid DNA |
SDF-1 |
Phase I/II (Unknown) |
Single injection of escalating doses (30 and 45 mg) Phase I (RETRO-HF): JVS-100 showed promising signs of clinical efficacy [132] |
HF |
AZD8601 (NCT02935712) (NCT03370887) |
mRNA |
VEGF-A165 |
Phase IIa (Active, not recruiting) |
Single injection of escalating doses (3 mg and 30 mg) Preclinical studies: promoted angiogenesis, improved cardiac function and enhanced survival were reported [133] Phase I: ID injection of AZD8601 was well tolerated and enhanced the basal skin blood flow [134] |
HF |
NAN-101 (NCT04179643) |
AAV |
I-1c |
Phase I (Recruiting) |
Single escalating doses (3 × 1013 vg–3 × 1014 vg) of NAN-101 Preclinical studies: enhancement in left ventricular ejection fraction and improved cardiac performance [135] |
AMI IHD |
VM202RY (NCT01422772) (NCT03404024) |
DNA plasmid |
HGF-X7 |
Phase II (Recruiting) |
Single escalating (0.5–3 mg) doses, administered into multiple sites Phase I: improved myocardial function and wall thickness |
MI Angina pectoris |
AdVEGF-D (NCT01002430) |
AV |
VEGF-D |
Phase I/IIa (Completed) |
Single escalating (1 × 109–1 × 1011 Vpu) doses, injected into multiple sites in the endocardium Phase 1/IIa: AdVEGF-D improved myocardial perfusion reserve in the injected region [137] |
MI |
Ad-HGF (NCT02844283) |
AV |
HGF |
Phase I/II (Unknown) |
Single dose Preclinical studies: Ad-HGF preserved cardiac function, reduced infarct size, and improved post-MI cardiac remodeling [138]; fractional repeated dosing significantly improved cardiac function compared with single injection [139] |
MI |
L-type Ca2+ channels’ AID peptide and antioxidant molecule (curcumin) in poly nanoparticles |
Reduced the elevated level of ROS and the intracellular Ca2+ [140] |
|||
LPLD |
Alipogene tiparvovec (NCT00891306) |
AAV |
LPL |
Approved |
1 × 1012 GC/kg Phase II/III: reduction in mean total plasma and chylomicron TG level [141] |
HF: Heart failure; hAC6: Human adenylyl cyclase type 6; vp: Virus particles; AAV: Adeno-associated virus; SERCA2a: Sarcoplasmic/endoplasmic reticulum Ca2+-ATPase; DRP: DNase-resistant particles; HFrEF: HF with reduced ejection fraction; CVD: Cardiovascular diseases; SDF-1a: stromal cell-derived factor 1; VEGF: Vascular endothelial growth factor; I-1c: Constitutively active inhibitor-1; vg: Viral genomes; AMI: Acute myocardial infarction; IDH: Ischemic heart disease; HGF-X7: Hepatocyte growth factor-X7; AV: Adenovirus; Vpu: Viral protein U; HGF: Hepatocyte growth factor; AID: alpha-interacting domain; ROS: reactive oxygen species; LPL: Lipoprotein lipase; TG: Triglycerides; GC: Genome copies.
Condition |
Intervention and Identifier |
Therapy |
Target |
Stage and Status |
Dose and Outcome |
---|---|---|---|---|---|
HTN |
NO-releasing nanoparticles |
Reduction in the mean arterial blood pressure [147] |
|||
HF Arrhythmia |
Digoxin |
Dose: 0.25 mg once daily [54] |
|||
MI HF HTN Arrhythmia |
ß-blocker |
Beta-adrenergic receptors |
Acebutol: 200 mg twice daily [45] |
||
HF |
Mesoporous silicon vector (Nanoconstruct) |
Able to internalize, accumulate, and traffic within the cardiomyocytes [148] |
|||
HF |
Combination of biocompatible magnetic nanoparticles and low-frequency magnetic stimulation |
Cardio-myocytes |
Managed the drug release by controlling the applied frequencies [149] |
||
HF |
S100A1-loaded nanoparticles, decorated with N-acetylglucosamine |
Regulated Ca2+ release and restored contractile function in the isolated failing cardiomyocytes [150] |
|||
HF |
Biodegradable nanoparticles conjugated with myocyte-targeting peptide and PDT-enabling photosensitizer |
PDT |
Cardio-myocytes |
Induced cell-specific death upon application of laser light, leaving adjacent and surrounding cells completely intact [151] |
|
MI |
Unfractionated heparin |
Anticoagulant 60 IU/kg for initial bolus 12 IU/kg/h for maintenance [152] |
|||
MI |
Aspirin |
Platelets |
325 mg, then 81 mg per day [56] |
||
MI |
Human recombinant VEGF-165 |
Significant improvement in the infarcted zone perfusion and cardiac function for up to six weeks post-MI [153]. |
|||
MI |
Nanoparticles containing siRNA |
Anti-inflammatory effect in the infarcted heart and reduction of the post-MI heart failure [154] |
|||
MI |
Magnetic nanoparticles-loaded cells |
Robust improvement in the left ventricular and cardiac function [155] |
|||
MI |
Insulin-like growth factor electrostatically-complexed with PLGA nanoparticles |
Higher incidence in preventing cardiomyocytes’ apoptosis, reducing infarct size, and enhancing left ventricular function [156] |
|||
MI |
Pitavastatin in PLGA nanoparticles |
Cardioprotective effect against ischemia-reperfusion injury [157] |
|||
HoFH |
AAV8.TBG.HldlR (NCT02651675) |
AAV |
hLDLR |
Phase I/II (Completed) |
Single dose Preclinical studies: reduction in total cholesterol [158][159] |
Elevated LDL-C |
ALN-PCS02 (NCT01437059) |
siRNA |
PCSK9 |
Phase I (Completed) |
Single escalating (15 and 400 μg/kg) doses Phase I: reduction in the level of circulating PCSK9 protein and LDL-C [160] |
HTN: Hypertension; NO: nitric oxide; HF: Heart failure; MI: Myocardial infarction; PDT: Photodynamic therapy; VEGF: Vascular endothelial growth factor; PLGA: Poly lactic-co-glycolic acid; AAV: Adeno-associated virus; HoFH: Homozygous familial hypercholesterolemia; hLDLR: Human low density lipoprotein receptor; TBG: Thyroxine-binding globulin; LDL-C: low density lipoprotein cholesterol.