Review Article

Nigella sativa and Its Protective Role in Oxidative Stress and Hypertension

Table 1

Significant cardiovascular effects of NS and its constituents.

ReferenceStudy modelConstituentsLaboratory findings

[12]Renovascular hypertensive ratNS oil (i.p.)
0.2 mL/kg
SBP, tissue MDA, luminol, and lucigenin CL
↑ tissue Na+ and K+-ATPase
plasma CK, LDH, and ADMA
↑ plasma NO

[15]Rat(a) NS oil (i.v.)
 4–32 μL/kg
(b) TQ (i.v.)
 0.2–1.6 mg/kg
arterial BP and heart rate
(dose dependent)

[16]Guinea pigNS oil (i.v.)
4–32 μL/kg
arterial BP and heart rate
(dose dependent)

[17]Rat(a) De-TQ volatile oil (i.v.)
 2–16 μL/kg
(b) α-pinene (i.v.)
 1–4 μL/kg
(c) p-cymene (i.v.)
 2–16 μL/kg
arterial BP and heart rate
(dose dependent)
*De-TQ volatile oil and p-cymene:
4, 8, and 16 μL/kg
*α-pinene:
2 and 4 μL/kg

[18]RatThymol
(in vitro)
aortic contraction
(dose dependent)

[19]Canine and guinea pigThymol
(in vitro)
Negative inotropic action
(dose dependent)

[20]Spontaneously hypertensive rat NS seed extract (p.o.)
0.6 mL/kg
↑ diuresis
arterial BP

[21]Spontaneously hypertensive rat NS extract (p.o.)
SBP
↑ GFR, urinary and electrolyte output

[22]L-NAME-induced
hypertensive rat
TQ (p.o.)
0.5 mg/kg and
1 mg/kg
SBP and serum creatinine
↑ kidney GSH

[23]L-NAME-induced hypertensive ratNS seed extract (p.o.)
400 mg/kg
arterial BP, SBP, DBP, and serum LDH
↑ serum NO

[24]Patients with mild hypertensionNS seed extract (p.o.)
100 mg/kg and
200 mg/kg
SBP and DBP
(dose dependent)
total and LDL cholesterol

NS: Nigella sativa; L-NAME: L-NG-nitroarginine methyl ester; i.p.: intraperitoneal; i.v.: intravenous; p.o.: per os; TQ: thymoquinone; De-TQ: de-thymoquinonated; SBP: systolic blood pressure; DBP: diastolic blood pressure; MDA: malondialdehyde; CL: chemiluminescence; CK: creatine kinase; LDH: lactate dehydrogenase; ADMA: asymmetric dimethylarginine; NO: nitric oxide; GFR: glomerular filtration rate; GSH: glutathione; LDL: low-density lipoprotein.