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Fulltext Effects of phytosterol supplementation on lipid peroxidation induced by carbon tetrachloride in a rat model

Nazrun, A.S., Nur Azlina, M.F., Norazlina, M., Kamisah, Y., Qodriyah, M.S., Azma, A.Y., et al.

Medicine & Health, 2011;6(1):25-32.
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Phytosterols are plant sterols with a chemical structure similar to cholesterol. It has anti-cholesterol, anti-cancer and anti-oxidant properties which are probably mediated by suppression of lipid peroxidation. However, there are limited studies on the effects of phytosterols on lipid peroxidation. The aim of this study is to determine the effects of phytosterols on plasma and tissue malondialdehyde (MDA) of rats exposed to carbon tetrachloride. The rats were divided into four groups of normal control (NC), carbon tetrachloride (CCl4), phytosterol (P) and phytosterol+carbon tetrachloride (P+CCl4).
The P and P+CCl4 groups were pretreated with subcutaneous phytosterol at 140 mg/kg once weekly for 5 weeks while the NC and CCl4 groups only received olive oil (vehicle). A single oral dose of carbon tetrachloride was then given to rats in the CCl4and P+CCl4 groups to induce lipid peroxidation. After 24 hours, all the rats were sacrificed and the plasma and tissue MDA were measured. Our results showed carbon tetrachloride had caused significant elevations of the plasma and hepatic MDA of the CCl4 group compared to the NC group. Phytosterol pretreatment (P+CCl4 group) were able to prevent the MDA elevations. Phytosterols treatments in normal rats (P group) were found to reduce the hepatic MDA level. The conclusion of this study was that phytosterols are effective suppressor of plasma and hepatic lipid peroxidation. They have potential as supplements to further reduce lipid peroxidation in healthy individuals.

Matched MeSH terms: Chemokine CCL4
Fulltext Cytokine expression profile of dengue patients at different phases of illness

Rathakrishnan A, Wang SM, Hu Y, Khan AM, Ponnampalavanar S, Lum LC, et al.

PLoS One, 2012;7(12):e52215.
PMID: 23284941 DOI: 10.1371/journal.pone.0052215

BACKGROUND: Dengue is an important medical problem, with symptoms ranging from mild dengue fever to severe forms of the disease, where vascular leakage leads to hypovolemic shock. Cytokines have been implicated to play a role in the progression of severe dengue disease; however, their profile in dengue patients and the synergy that leads to continued plasma leakage is not clearly understood. Herein, we investigated the cytokine kinetics and profiles of dengue patients at different phases of illness to further understand the role of cytokines in dengue disease.
METHODS AND FINDINGS: Circulating levels of 29 different types of cytokines were assessed by bead-based ELISA method in dengue patients at the 3 different phases of illness. The association between significant changes in the levels of cytokines and clinical parameters were analyzed. At the febrile phase, IP-10 was significant in dengue patients with and without warning signs. However, MIP-1β was found to be significant in only patients with warning signs at this phase. IP-10 was also significant in both with and without warning signs patients during defervescence. At this phase, MIP-1β and G-CSF were significant in patients without warning signs, whereas MCP-1 was noted to be elevated significantly in patients with warning signs. Significant correlations between the levels of VEGF, RANTES, IL-7, IL-12, PDGF and IL-5 with platelets; VEGF with lymphocytes and neutrophils; G-CSF and IP-10 with atypical lymphocytes and various other cytokines with the liver enzymes were observed in this study.
CONCLUSIONS: The cytokine profile patterns discovered between the different phases of illness indicate an essential role in dengue pathogenesis and with further studies may serve as predictive markers for progression to dengue with warning signs.

Matched MeSH terms: Chemokine CCL4/blood
Fulltext Evaluation of Levels of Proinflammatory Chemokines MIP-1α and MIP-1β in Gingival Crevicular Fluid of Primary, Mixed and Permanent Dentition

Swathi B, Charitha M, Mandava D, Tugaram N, Mudrakola DP, Yelamanchi R

J Int Soc Prev Community Dent, 2019 04 12;9(2):205-209.
PMID: 31058072 DOI: 10.4103/jispcd.JISPCD_438_18

Aim: This study aims to find out the proinflammatory chemokines macrophage inflammatory protein (MIP)-1α and MIP-1β levels in gingival crevicular fluid (GCF) of primary, mixed, and permanent dentitions.
Materials and Methods: GCF of 160 individuals (4-15 years of age) was collected by the extracrevicular method. They were categorized into four groups (40 per each group). Group I: subjects with primary dentition (4-5 years of age), Group II: 40 subjects in early transition period (6-8 years), Group III: 40 individuals in the late transition period (9-11 years), and Group IV: 40 individuals with permanent dentition (12-15 years). MIP-lα and MIP-1β levels were determined in the samples of GCF by ELISA method. Data were analyzed by software SPSS Version 20 (IBM SPSS Statistics for Windows, IBM Corp., Armonk, NY: USA).
Results: MIP-1α and MIP-1β were detected in all samples. The highest mean MIP-1α and MIP-1β concentrations in GCF were detected in the early transition period, while the lowest concentrations were seen in primary dentition group. The chemokine levels were higher in girls than in boys in Group III. There was a substantial rise of MIP-1α and MIP-1β levels during eruption.
Conclusions: Since levels of MIP-1α and MIP-1β in GCF are positively associated with tooth eruption, they may perhaps be deemed as novel biomarkers in the eruption process.

Matched MeSH terms: Chemokine CCL4
Fulltext Cytokines secreted by human Wharton's jelly stem cells inhibit the proliferation of ovarian cancer (OVCAR3) cells in vitro

Kalamegam G, Sait KHW, Anfinan N, Kadam R, Ahmed F, Rasool M, et al.

Oncol Lett, 2019 May;17(5):4521-4531.
PMID: 30944641 DOI: 10.3892/ol.2019.10094

Cytokines enhance tumour cell recognition via cytotoxic effector cells and are therefore effectively used in cancer immunotherapy. Mesenchymal stem cells have efficient homing potential and have been used to target and inhibit various types of cancer mediated by the release of soluble/bioactive factors. Initial evaluation of the human Wharton's jelly stem cell conditioned medium (hWJSC-CM) and cell lysate (hWJSC-CL) against an ovarian cancer cell line (OVCAR3) demonstrated their inhibitory effect in vitro. The secreted cytokine profile was then studied to understand whether the OVCAR3 inhibitory effect was mediated by the cytokines. Expression of cytokines in OVCAR3 following 48 h treatment with hWJSC extracts, namely the hWJSC-CM (50%) and hWJSC-CL (10 µg/ml), was evaluated using multiplex cytokine assay. Paclitaxel (5 nM) was used as a positive control. Cytokines tumour necrosis factor α, interleukin (IL)-4, IL-6, IL-8, IL-10, IL-13, IL-17, IL-1β and granulocyte colony-stimulating factor, reported to be involved in tumour growth, invasion and migration, were significantly decreased. Cytokines with antitumour effects, namely IL-1 receptor antagonist (IL-1RA), IL-2, IL-2 receptor, IL-5, IL-7, IL-12, IL-15, interferon (IFN)-α and IFN-γ, were mildly increased or decreased. Only the increases in IL-1RA (with paclitaxel, hWJSC-CM and hWJSC-CL) and granulocyte-macrophage colony-stimulating factor (with hWJSC-CL) were statistically significant. The chemokines monocyte chemoattractant protein 1, macrophage inflammatory protein (MIP)-1α, MIP-1β and Regulated Upon Activation, Normally T-Expressed, and Secreted were significantly decreased while monokine induced by IFN-γ, IFN-γ induced protein 10 and Eotaxin demonstrated mild decreases. The growth factors basic fibroblast growth factor, vascular endothelial growth factor and hepatocyte growth factor were significantly decreased. Heatmaps demonstrated differential fold changes in cytokines and hierarchical cluster analysis revealed 3 major and 7 minor sub-clusters of associated cytokines, chemokines and growth factors. In conclusion, the hWJSC extracts decreased the expression of oncogenic cytokines, chemokines and growth factors, which mediated the inhibition of OVCAR3 cells in vitro.

Matched MeSH terms: Chemokine CCL4