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Sardine proteins (Sardina pilchardus) combined with green lemon zest (Citrus latifolia) improve blood pressure, lipid profile and redox status in diabetic hypertensive rats

HadjMostefa Khelladi (Laboratory of Clinical and Metabolic Nutrition, Department of Biology, Faculty of Natural Sciences and Life, Université d’Oran 1, Oran, Algeria)
Djamil Krouf (Laboratory of Clinical and Metabolic Nutrition, Department of Biology, Faculty of Natural Sciences and Life, Université d’Oran 1, Oran, Algeria)
Nawal Taleb-Dida (Laboratory of Clinical and Metabolic Nutrition, Department of Biology, Faculty of Natural Sciences and Life, Université d’Oran 1, Oran, Algeria)

Nutrition & Food Science

ISSN: 0034-6659

Article publication date: 30 April 2018

Issue publication date: 10 July 2018

Abstract

Purpose

This paper aims to study the effect of green lemon zest combined with sardine proteins in diabetic hypertensive rats (DHRs).

Design/methodology/approach

Male Wistar rats (n = 30) weighing 250 ± 10 g were divided into five groups. The first group consumed a diet containing 20 per cent casein (C). The other four groups are rendered diabetic by intraperitoneal injection of streptozotocin (40 mg/kg body weight), then hypertensive by subcutaneous implantation controlled time-release pellet containing ouabain (0.25 mg/pellet). One untreated group (DHR) consumed 20 per cent casein and the three other groups consumed the same diet supplemented with 2 per cent green lemon zest (DHR-lz), or with 20 per cent of sardine protein (group DHR-sp) or with the combination of both sardine proteins and green lemon zest (group DHR-sp + lz).

Findings

DHRs feeding on the combination of both sardine protein (sp) and lemon zest (lz) induced a significant decrease of diastolic blood pressure and heart rates values compared with DHR (p < 0.05). The HDLC values were increased by +55 per cent in DHR-sp + lz compared with DHR group. Moreover, plasma non-HDLC concentrations were decreased significantly compared to DHR, DHR-lz, DHR-sp and C groups. In DHR-sp + lzvs DHR group, TBARS values were decreased by −25 per cent in the liver. Moreover, kidney TBARS were significantly reduced by −66, −51, −65 and −67 per cent compared with C, DHR, DHR-lz and DHR-sp, respectively.

Originality/value

These results suggest that consumption of green lemon zest combined with sardine proteins can reduce blood pressure and tissue oxidative damage and, therefore, help to prevent cardiovascular complications in hypertensive diabetic patients.

Keywords

Acknowledgements

This work was supported by the Algerian Ministry of Higher Education and Scientific Research. The authors gratefully thank for their help and financial support.

Citation

Khelladi, H., Krouf, D. and Taleb-Dida, N. (2018), "Sardine proteins (Sardina pilchardus) combined with green lemon zest (Citrus latifolia) improve blood pressure, lipid profile and redox status in diabetic hypertensive rats", Nutrition & Food Science, Vol. 48 No. 4, pp. 654-668. https://doi.org/10.1108/NFS-10-2017-0218

Publisher

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Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited