THEACEAE Camellia sinensis  (L.) Kuntze

 Synonym

  • THEACEAE Thea sinensis  L.
  • THEACEAE Camellia sinensis  (L.) Kuntze var. assamica (Mast.) Kitam.
 Thai / English name

  • ชา*

[1-4] of 8 article(s) found

 หน้า  1  2  

[1] IN VITRO INHIBITION OF HUMAN CYTOCHROME P450-MEDIATED METABOLISM OF MARKER SUBSTRATES BY NATURAL PRODUCTS.
FOSTER BC,VANDENHOEK S,HANA J,ET AL.
PHYTOMEDICINE 2003 Vol.10(),334-42  $11159 [Full]

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Aqueous extracts (Darjeeling tea)
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : Aqueous extracts of bulk spices 25 mg/ml
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark : Resut: Percent inhibition = 82.9+/-1.71

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Aqueous extracts (Earl Grey tea)
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : Aqueous extracts of bulk spices 25 mg/ml
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark : Resut: Percent inhibition = 78.3+/-0.63

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Aqueous extracts (English breakfast tea)
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : Aqueous extracts of bulk spices 25 mg/ml
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark : Resut: Percent inhibition = 84.0+/-1.54

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Aqueous extracts (English breakfast tea)
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : Aqueous extracts of bulk spices 25 mg/ml
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark : Resut: Percent inhibition = 76.5+/-0.51

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Aqueous extracts (Orange Pekoe tea)
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : Aqueous extracts of bulk spices 25 mg/ml
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark : Resut: Percent inhibition = 83.1+/-1.01

[2] IN VITRO INHIBITION OF CYP3A4 BY HERBAL REMEDIES FREQUENTLY USED BY CANCER PATIENTS.
ENGDAL S,NILSEN OG
PHYTOTHER RES 2009 Vol.23(7),906-12  $24423 [Full]

Part Used : -
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : -
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : -
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : Ketoconazole*/Nizoral/Levoketoconazole/Panfungol/Ketoisdin/Orifungal M/Ketozole/Normocort/Ketoderm/Fungarest/Fungoral/Extina/Ketoconazolum/Brizoral/Kuric/Ketoconazol/Xolegel/Onofin K/Teryzolin/Terzolin
Dose/Conc.(drug) : -
Result : Positive
Remark : The IC50/IC25 ratios for the inhibiting herbal remedies ranged from 2.15 to 2.67, indicating similar inhibition profiles of the herbal inhibitors of CYP3A4. Garlic and Natto K2 were classified as non-inhibitors. Although Agaricus, noni juice, mistletoe and green tea inhibited CYP3A4 metabolism in vitro, clinically relevant systemic or intestinal interactions with CYP3A4 were considered unlikely, except for a probable inhibition of intestinal CYP3A4 by the green tea product.
Note : Testosterone was used as a substrate and ketoconazole as a positive quantitative inhibition control.

[3] INHIBITORY EFFECTS OF POLYPHENOLS ON HUMAN CYTOCHROME P450 3A4 AND 2C9 ACTIVITY.
KIMURA Y,ITO H,OHNISHI R,ET AL.
FOOD CHEM TOXICOL 2010 Vol.48(),429-35  $27410 [Full]

Part Used : -
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Kaempferol
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : -
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark :
Note : Three coumarins and 12 flavonoids significantly suppressed CYP3A4 or CYP2C9 activities. Lineweaver-Burk plot analysis indicated that apigenin and its dimer amentoflavone and imperatorin displayed a mixed type of inhibition on CYP3A4 or CYP2C9. Among the inhibitors, amentoflavone was the most potent inhibitor of CYP3A4 and CYP2C9 activities with IC50 values of 0.07 and 0.03 micromolar, respectively. The Ki value of amentoflavone was significantly lower than that of the CYP2C9 inhibition positive control sulfaphenazole.

Part Used : -
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : Myricetin
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : -
Duration : -
Type of interaction : Pharmacokinetics
Interaction with drug : -
Dose/Conc.(drug) : -
Result : Positive
Remark :
Note : Three coumarins and 12 flavonoids significantly suppressed CYP3A4 or CYP2C9 activities. Lineweaver-Burk plot analysis indicated that apigenin and its dimer amentoflavone and imperatorin displayed a mixed type of inhibition on CYP3A4 or CYP2C9. Among the inhibitors, amentoflavone was the most potent inhibitor of CYP3A4 and CYP2C9 activities with IC50 values of 0.07 and 0.03 micromolar, respectively. The Ki value of amentoflavone was significantly lower than that of the CYP2C9 inhibition positive control sulfaphenazole.

[4] THE EFFECT OF COMPLEMENTARY AND ALTERNATIVE MEDICINES ON CYP3A4-MEDIATED METABOLISM OF THREE DIFFERENT SUBSTRATES: 7-BENZYLOXY-4-TRIFLUOROMETHYL-COUMARIN, MIDAZOLAM AND DOCETAXEL.
MOOIMAN,KIM D.;MAAS-BAKKER,ROEL F.;HENDRIKX,JEROEN J.M.A.;ET AL.
J PHARM PHARMACOL 2014 Vol.66(6),865-74  $52931 [Full]

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : green tea extract
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : 25 microgram/ml
Duration : 5 minutes
Type of interaction : Pharmacokinetics
Interaction with drug : Midazolam*/Versed/Dormicum
Dose/Conc.(drug) : -
Result : Positive
Remark : - Details of the standardized Green tea extracts: 99.61% Tea polyphenols, 65.38% EGCG, 82.79% Catechins, 1.17% Caffeine, 3.98% Water, 0.18% Sulfated ash. - Results: The degree of CYP3A4 inhibition of Ginkgo biloba was 93.8% and IC50 values of that inhibit CYP3A4-mediated metabolism of midazolam = 9.96 microgram/ml, 95% Cl: 5.41-18.3.
Note : The effects of complementary and alternative medicine (CAM) on CYP3A4-mediated metabolism of midazolam and docetaxel were determined in human liver microsomes (HLM), using liquid-chromatography coupled to tandem mass spectrometry (LC-MS/MS).

Part Used : ใบ
Activity : CYP3A4 INHIBITION
Solvent/Active Compound : green tea extract
Type of experiment : in vitro
Type of animal : -
Type of study : -
N(Total) : -
N(Treatment) : -
Sex : -
Age : -
Route : -
Dose/Conc.(herb) : 100 microgram/ml
Duration : 30 minutes
Type of interaction : Pharmacokinetics
Interaction with drug : Docetaxel*/Taxotere
Dose/Conc.(drug) : -
Result : Positive
Remark : - Details of the standardized Green tea extract: 99.61% Tea polyphenols, 65.38% EGCG, 82.79% Catechins, 1.17% Caffeine, 3.98% Water, 0.18% Sulfated ash. - Results: The degree of CYP3A4 inhibition of Ginkgo biloba was 90.9% and IC50 values of that inhibit CYP3A4-mediated metabolism of docetaxel = 42.3 microgram/ml, 95% Cl: 36.2-49.4.
Note : The effects of complementary and alternative medicine (CAM) on CYP3A4-mediated metabolism of midazolam and docetaxel were determined in human liver microsomes (HLM), using liquid-chromatography coupled to tandem mass spectrometry (LC-MS/MS).


 หน้า  1  2