Page 48 - IMO-2-1
P. 48

Innovative Medicines & Omics                              Current approach in the management of kidney disease



            inflammation, anti-oxidative, anti-diabetic, anticancer,   decreased levels of miR-192, a crucial miRNA involved in
            and nephroprotective action. Phytocompounds, including   the development and exacerbation of nephropathy, and
            flavonoids, have the ability to both directly and indirectly   the increase of SIP1. Further research is required to assess
            reduce renal damage. Significant biological benefits of   troxerutin’s effects on collagen levels and ECM proteins, to
            flavonoids  in CKD  include reducing oxidative  stress,   evaluate  its  potential  as  a  natural  preventive  component
            immunological modulation, antioxidant actions, anti-  that can help avoid renal problems  Similarly, research
                                                                                            53
            inflammation, anti-apoptosis, gut microbiota regulation,   has found that troxerutin may reduce cisplatin-induced
            anti-diabetic, and antihypertensive; they also help to relieve   kidney cell death in rats by increasing microtubule-
            renal fibrosis.  In addition, they serve as intermediaries for   associated protein 4 (MAP4) expression and activating the
                      49
            the activation of the Nrf2 antioxidant action, which lowers   PI3K/AKT signaling pathway, one of the most effective
            oxidative stress. 50                               intracellular pathways for enhancing cell survival.  In
                                                                                                         54
                                                               addition, troxerutin has been demonstrated to prevent
            3.7.1. Troxerutin                                  renal damage caused by drug-induced cytotoxicity in rat
            Troxerutin, a derivative of the naturally occurring   models by increasing the antioxidant defense system and
            bioflavonoid and found in tea and coffee. The ability of   reducing lipid peroxidation.
            troxerutin to reduce drug-induced nephrotoxicity has
            been investigated in earlier research. Troxerutin reduces   3.7.2. Fisetin
            the oxidative stress induced by cisplatin and methotrexate   Fisetin, a flavonoid is isolated from a variety of fruits,
            by inhibiting lipid peroxidase and nicotinamide adenine   vegetables,  seaweeds, and  persimmons,  as well as
            dinucleotide phosphate oxidase 1 (NOX-1), restoring   strawberries, apples, and onions. After being given
            superoxide dismutase (SOD), GSH, and glutathione   orally to mice, it can penetrate the blood-brain barrier
            peroxidase (GPx) levels, and activating the Nrf2/HO-1   and accumulate in the brain. Fisetin is rapidly bio-
                            51
            signaling pathway.  Long-term administration of    transformed through conjugative metabolism, mostly
            2,2,4,4-tetrabromodiphenyl ether (PBDE-47) increased   by  glucuronidation,  sulfation,  and  methylation  in
            Kelch-like ECH associated protein 1 (KEAP1) levels,   the liver, and is eliminated through urine and feces.
            leading to Nrf2 ubiquitination and degradation, which   Cytochrome P450  enzymes are among the Phase I
            in turn decreased Nrf2 activity and its downstream genes   and II metabolic enzymes involved in the metabolic
            in the kidneys of mice, including catalase, GPx, SOD,   process. In vitro  research demonstrated that fisetin,
            and heme oxygenase 1 (HO-1). Nevertheless, troxerutin   like other flavonoids, inhibits a number of cytochrome
            enhanced Nrf2 activity, prevented the negative effects   P450  enzymes,  potentially leading  to drug  interactions
            of PBDE-47 and partially mimicking the action of   when combined with other medications. Fisetin inhibits
            carbobenzoxy-l-leucyl-l-leucinal (MG132). In the liver of   myeloperoxidase (MPO) activity, inflammatory cytokines,
            mice, PBDE-47 was found to increase caspase-3 action   and renal production of iNOS, thereby protecting the
                                                                                                      55
            and the levels of B-cell lymphoma 2 (Bcl-2)-associated   kidney from drug-induced renal impairment.  In the
            X (Bax) and Bcl-2.  Activated TGF-β has been linked to   context  of  ureteric  obstruction,  TGF-β  is  essential  for
                           52
            the pathogenesis of diabetic KD. TGF-β triggers receptor   cell development, proliferation, differentiation, apoptosis,
            activation  through  autocrine  and  paracrine  pathways,   immunological  response,  and  renal  fibrosis.  TGF-β1
            initiating a signaling cycle that ultimately regulates the   binds to its receptor, TβRII, causing phosphorylation of
            production of ECM, leading to the impaired mesangial cell   TβRI and activation of TGF-β1 downstream effectors,
            function. As nephropathy progresses, TGF-β builds up in   including suppressor of mothers against decapentaplegic
            mesenchymal cells and influences the synthesis of ECM   (SMAD). Canonical pathway involves receptor-regulated
            proteins, such as collagen I and collagen II. TGF-β inhibits   SMADs (R-SMADs), such as SMAD2/3, which are both
            E-box repressors like δEF1 and SMAD interacting protein   overexpressed in human fibrotic kidneys, and responsible
            1 (SIP1), which regulate collagen gene expression. The role   for TGF-β1 signaling transduction. Non-canonical SMAD-
            and target of certain kidney-dwelling microRNAs, such as   independent pathways, including Rho-like GTPase,
            miR-192, miR-194, miR-204, and miR-215, in the setting   PI3K/AKT, Jun N-terminal kinases (JNKs), and MAPK,
            of nephropathy have received significant attention. Since   also regulate gene transcription, promoting apoptosis
            miR-192 has been shown to target SIP1, the low levels of   and the epithelial-to-mesenchymal transition (EMT).
            SIP1 observed in diabetics may validate the interaction   In experimental models, fisetin injections (25 mg/kg)
            between elevated TGF-β and miR-192, leading to low   administered intraperitoneally one hour prior to surgery
            levels of SIP1 in renal tissue. Troxerutin’s effects on the   and every other day for seven days. In addition, fisetin
            kidney in a diabetic rat model appear to be mediated by   pretreatment (40  µM) dramatically decreased TGF-β1-


            Volume 2 Issue 1 (2025)                         42                               doi: 10.36922/imo.4969
   43   44   45   46   47   48   49   50   51   52   53