Table 3.
PHYSICOCHEMICAL | ||||||||||
logPa | pKab | Swc | DiffCd | MolVole | MDCKf | Peffg | Skinh | Corneai | BBBj | logBBk |
4.23 | 3.73 | 4.79 | 8.29 | 266 | 5.45 | 4.90 | 1.25 | 1.48 | High | 0.15 |
PHARMACOKINETIC | ||||||||||
Hum_fupl | RBPm | Vdn | ECCSo | CL_Metbp | CL_Renalq | CL_Uptaker | ||||
1.06% | 0.12 | 0.31 | Class 2 | Yes (99%) | No (95%) | No (99%) | ||||
METABOLISM | ||||||||||
Phase 1. Oxidations | CYP1A2 | CYP2A6 | CYP2B6 | CYP2C8 | CYP2C9 | CYP2C19 | CYP2D6 | CYP2E1 | CYP3A4 | |
Substratet | Yes | Yes | Yes | Yes | No | No | Yes | No | Yes | |
Confidenceu | 88% | 60% | 55% | 79% | 81% | 98% | 82% | 97% | 83% | |
Kmv | 23.02 | - | - | - | - | - | 63.02 | - | 55.73 | |
Vmaxw | 7.10 | - | - | - | - | - | 3.48 | - | 0.41 | |
CLintx | 16.04 | - | - | - | - | - | 0.44 | - | 0.82 | |
Phase 2. Glucuronidationy | UGT1A1 | UGT1A3 | UGT1A4 | UGT1A6 | UGT1A8 | UGT1A9 | UGT1A10 | UGT2B7 | UGT2B15 | |
Substratet | Yes | No | No | No | Yes | Yes | No | No | No | |
Confidenceu | 90% | 51% | 72% | 75% | 87% | 88% | 86% | 56% | 98% |
logP: octanol-water partition coefficient (lipophilicity)
pKa: dissociation constant using submodels to predict protic ionization microconstants for all identified ionizable groups in a molecule.
Sw (mg/mL×10−4): native water solubility.
DiffC (cm2/s×106): molecular diffusion coefficient in water
MolVol (cm3/mol): molal volume at the normal boiling point
MDCK (cm2/s×105): apparent MDCK COS permeability
Peff (cm2/s×104): human effective jejunal permeability
Skin (cm2/s×105): permeability through human skin
Cornea (cm2/s×105): permeability through rabbit cornea
BBB: qualitative likelihood (High/Low) of crossing the blood-brain barrier (98% confidence)
logBB: logarithm of the brain/blood partition coefficient.
Hum_fup: percent unbound to blood plasma proteins in human.
RBP: blood-to-plasma concentration ratio in human.
Vd (L/kg): volume of distribution in humans at steady state.
ECCS Class: Extended Clearance Classification System (ECCS) assignment
CL_Metab: predicts whether or not metabolism will be critical to clearance
CL_Renal: predicts whether or not renal elimination will be critical to clearance.
CL_Uptake: predicts whether or not hepatic uptake will be critical to clearance.
Most common chemical reaction of Phase 1 of metabolism (oxidation) by Cytochromes P450 (CYP) enzymes
Substrate: substrate classification models (yes/no) for human CYPxxx or UGTxxx
Confidence of predictions
Km (μM): estimated Michaelis-Menten Km constant for predicted sites of metabolism by human CYPxxx
Vmax: [nmol/min/nmol enzyme]: estimated Michaelis-Menten Vmax constant for predicted sites of metabolism by CYPxxx
CLint (μL/min/mg human liver microsomes (HLM) protein): estimated intrinsic clearance for predicted sites of metabolism by CYPxxx
Most common chemical reaction of Phase 2 of metabolism (glucuronidation) by uridine 5′-diphospho-glucuronosyltransferase (UGT)