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Resistant starch from black rice, Oryza sativa L. var. ameliorates renal inflammation, fibrosis and injury in insulin resistant rats.

Phytotherapy research : PTR
March 1, 2023
Laongdao Thongnak et al. (10 authors)
Journal ArticleAnimal Study
Study Details

Study Goal

The researchers aimed to investigate the effect of resistant starch from black rice on renal inflammation, oxidative stress, and apoptosis in obese insulin-resistant rats.

Results Summary

Resistant starch from black rice at doses of 100 and 150 mg ameliorated insulin resistance, dyslipidemia, and liver injury, while also reducing renal inflammation, fibrosis, and apoptosis by inhibiting NF-κB and inflammatory cytokines. The treatment potentially restored kidney damage and dysfunction in obese insulin-resistant rats.

Population

Male Wistar rats fed a high-fat diet to induce obesity and insulin resistance.

Effective Dosage

100 mg and 150 mg of resistant starch.

Duration

Not specified in the abstract.

Interactions

None mentioned.

Extracted Claims (11)
InterventionDirectionEndpointPopulationDosageImpactClaim #
black rice (BR) extract
decrease
obesity, diabetes, osteoporosis
-
-
has anti-obesity, anti-diabetic, and anti-osteoporosis effects
#1
black rice (BR) extract
decrease
obese-related kidney dysfunction
animal models
-
has been shown to reduce
#2
resistant starch from BR (RS)
neutral
renal inflammation, oxidative stress, and apoptosis
obese insulin resistant rats
-
investigate the effect on
#3
high-fat (HF) diet
increase
insulin resistance
HF rats
-
shown
#4
high-fat (HF) diet
increase
renal inflammation, fibrosis and apoptosis progressing to kidney injury and dysfunction
HF rats
-
caused
#5
Prebiotic RS including anthocyanin from BR at doses of 100 and 150 mg
decrease
insulin resistance, dyslipidemia and liver injury
-
-
ameliorated
#6
Treatment with RS
decrease
TGF-β fibrotic and apoptotic pathways
-
-
reduced
#7
Treatment with RS
decrease
NF-κB and inflammatory cytokines
-
-
inhibition of
#8
Treatment with RS
decrease
kidney damage and dysfunction
-
-
potentially restore
#9
prebiotic RS from BR
decrease
obesity induced renal injury and dysfunction
insulin resistant rats induced by HF
-
ameliorated
#10
prebiotic RS from BR
decrease
inflammatory, fibrotic, and apoptotic pathways
insulin resistant rats induced by HF
-
attenuating
#11
Abstract

It has recently been reported that black rice (BR) extract has anti-obesity, anti-diabetic, and anti-osteoporosis effects. It has been shown to reduce obese-related kidney dysfunction in animal models. This study aimed to investigate the effect of resistant starch from BR (RS) on renal inflammation, oxidative stress, and apoptosis in obese insulin resistant rats. Male Wistar rats were divided into six groups: normal diet (ND), ND treated with 150 mg of RS (NDRS150), high-fat (HF) diet, HF treated with 100 and 150 mg of RS (HFRS100), (HFRS150), and HF treated with metformin as a positive control. Insulin resistance was shown in the HF rats by glucose intolerance, increased insulin, total area under the curve of glucose and homeostasis model assessment of insulin resistance and dyslipidemia. The resulting metabolic disturbance in the HF rats caused renal inflammation, fibrosis and apoptosis progressing to kidney injury and dysfunction. Prebiotic RS including anthocyanin from BR at doses of 100 and 150 mg ameliorated insulin resistance, dyslipidemia and liver injury. Treatment with RS reduced TGF-β fibrotic and apoptotic pathways by inhibition of NF-κB and inflammatory cytokines which potentially restore kidney damage and dysfunction. In conclusion, prebiotic RS from BR ameliorated obesity induced renal injury and dysfunction by attenuating inflammatory, fibrotic, and apoptotic pathways in insulin resistant rats induced by HF.

Medical Subject Headings (MeSH)
RatsMaleAnimalsInsulinOryzaInsulin ResistanceRats, WistarResistant StarchObesityDiet, High-FatInflammationFibrosis
Study Links
Quality Scores
SafetyNot Assessed
Efficacy85/10
Quality75/10
Citation Metrics
Total Citations2
Citations/Year1.0
Relative Citation Ratio0.51
NIH Percentile27.7%
Research Impact Scores
APT Score0.25
Weight Score1.82
Normalized Score0.69
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