Paw Edema Research Articles

Biosynthesis of silver nanoparticles using Mitracarpus scaber extracts for the treatment of infectious disease: synthesis, characterization, antibacterial and anti-inflammatory efficacy

Objective: Due to the need for better treatments for infectious disorders, the antibacterial and anti-inflammatory potential of silver nanoparticles (AgNPs) of Mitracarpus scaber (M.scaber) extracts were assessed in this study. Methods: AgNPs were synthesized from 0.1M AgNO3 solution using M.scaber aqueous and ethanolic extracts as capping and reducing agents. FTIR, UV-VIS, FESEM and XRD studies were used to analyze the generated AgNPs. The Agar well diffusion method was used to evaluate their antibacterial activity against E. coli, while egg albumin and carrageenan-induced paw oedema assays were used to measure the anti-inflammatory activity of silver nanoparticles of aqueous and ethanol extracts of M.scaber (A.AgNPs and E.AgNPs). Result: The formation of A.AgNPs and E.AgNPs at λ max = 425 nm and 410 nm, respectively, were demonstrated by UV–vis spectroscopy. The XRD pattern showed that the crystalline phase of silver and the generation of A.AgNPs and E.AgNPs were well aligned. Agglomerated A.AgNPs and E.AgNPs with particle sizes ranging from 5 to 20 nm were seen in the FESEM micrograph. The antibacterial activity result showed that, in a dose-dependent manner, A.AgNPs had a significantly (P<0.05) higher antibacterial activity against E.coli than E.AgNPs.The anti-inflammatory activity result showed that, following the fourth hour of the experimental setup, 100 mg/kg of A.AgNPs with peak effect (24.46 % inhibition) and 50 mg/kg of E.AgNPs with peak effect (18.11 % inhibition) produced the greatest inhibition of oedema development caused by carrageenan and egg albumin injection respectively. Conclusion: The present work, therefore, concludes that A.AgNPs and E.AgNPs have potential value in the management of infectious diseases.

Comparative Evaluation of the Phytochemical and Morphological Analysis and Anti-Inflammatory Effect of Lantana camara on Mice Animal Model

The aim of the study is to evaluate the phytochemical and morphological characterization between Iraqi and America Lanata camara extracts and to evaluate their inhibition effect on the egg albumin-induced paw inflammation. Successive maceration was used to eliminate the leaves of L. camara. The bioactive substance components present in the extract were identified using gas chromatography-mass spectrometry (GC-MS) analysis. In addition, HPLC analysis was performed for the detection of active compounds. The paw edema induced by injecting egg albumin (0.1ml) in both right and left hind-paw and the percentage inhibition as well as cell count, and skin thickness was measured. The initial phytochemical screening yielded positive test results for phenolic compounds, glycosides, tannins, saponins, anthraquinones, polysaccharides, and terpenoids. The results of GC-MS analysis of Iraqi and American leaves showed oleic acid (22.65%, 36.69%), octadecanoic acid (26.58%, 13.49%) and hexadecanoic acid (7.06%,14.52%), respectively, were the main compound in both extracts. The HPLC analysis indicated the presence of vitamin K in Iraqi and American leaves (9.52%, 9.77%) respectively, while there are no other research publications indicated to such results. The concentration 0.05% of Iraqi and America L. camara showed a significant inhibition effect (99.7%) of inflammation. The cell counts and skin thickness showed a significant decreased when treated with both extracts of L. camara. In conclusion, this study showed that the phytochemical composition of lantana camara leaf extract varies depending on the geographical region. The findings also suggest that this extract, contains various bioactive compounds that could be a valuable resource for developing pharmaceuticals to treat different diseases. The study also found that the extract has a significant anti-inflammatory effect and could be a promising option for inhibition of inflammation.

Analgesic and anti-inflammatory activities of NPK 500 capsules, a Cassia sieberiana DC. - Based herbal analgesic medicine used to treat dysmenorrhea and peptic ulcer, is mediated through the inhibition of PGE2 and iNOS

Ethnopharmacological relevancePain and inflammation are the most frequent reasons for which people seek medical care. Currently available analgesics against these conditions produce fatal adverse effects. NPK 500 capsules is an alternative herbal analgesic employed to treat dysmenorrhea, peptic ulcer and pain. NPK 500 is produced from Cassia sieberiana. A plant used in traditional medicine to treat pain and inflammation. Aim of the studyThis study reports the analysis, phytochemical characterization and mechanism of analgesic and anti-inflammatory activities of two NPK 500 capsules, called old and new NPK500 capsules (ONPK500 and NNPK500) respectively. Materials and methodsPhysicochemical, organoleptic, GC-MS and LC-MS methods were employed to analyze the NPK 500 capsules. Analgesic activity was evaluated using tail immersion, Randall-Selitto and acetic acid induced writing tests. Anti-inflammatory activity was evaluated using carrageenan-induced rat paw inflammation. Additionally, pro-inflammatory mediators such as prostaglandin E2 (PGE2), inducible nitric oxide synthase (iNOS), cyclooxygenase 1 and 2 (COX-2 and COX-1) were quantified in the sera of the rats using Enzyme Linked Immunosorbent Assay (ELISA) kits. ResultsThirteen major compounds were characterized in the NNPK 500 capsules via the GC-MS and LC-MS spectroscopies. Kaempferol was the major compound characterized in addition to physcion, β-sitosterol 3-O-β-D-glucopyranoside, betulinic acid and nine others. Physicochemical and organoleptic indices of the capsules were also derived for its authentication and quality control. Furthermore, NNPK 500 0.5–1.5 mg/kg p.o. produce significant (P < 0.5) analgesic activity (160–197%) higher than that of ONPK500 (109.8%) and Morphine (101%) in the tail immersion test. The analgesic activity of NNPK 500 0.5–1.5 mg/kg p.o. (171.0–258.3%) and ONPK 500 (179.5%) were also significant (P < 0.01) and higher than that of Aspirin (103.00%) in the Randall-Selitto test. Both capsules also demonstrated significant (P < 0.5) analgesic and anti-inflammatory activities in the acetic acid-induced writhing and carrageenan-indued paw edema tests respectively. The two NPK500 capsules also, significantly (P < 0.5) inhibited PGE2 and iNOS but not COX-2 and COX-1 in the carrageenan-indued paw edema test. ConclusionThese results show that NNPK 500 and ONPK 500 capsules possessed potent analgesic and anti-inflammatory activities via inhibition of PGE2 and iNOS as a result of their chemical constituents. NPK500 capsules thus, relief acute pain and inflammation without causing gastrointestinal, renal or hepatic injuries, since they did not inhibit COX-1.

Anti-inflammatory Effect of Apigenin Obtained by Portulaca oleracea L in ‎Male Mice

This study aimed to evaluate the potential anti-inflammatory effects of ‎‎apigenin, obtained from Portulaca oleracea L., using a male mouse model‎. A total of 56 ‎healthy BLAB/c albino male mice (Mus musculus) were used in two experiments. In the first experiment‎, ‎the xylene-induced ear edema, 28 male mice were randomly divided into four groups (n=7). ‎The negative control group received distilled water, while the positive control, apigenin-‎treated, and indomethacin-treated groups were exposed to xylene (0.03 mL applied to ‎the anterior and posterior surface of the right ear lobe) to induce inflammation. ‎Subsequently, the apigenin-treated group received orally 50 mg/kg BW apigenin, and ‎the indomethacin-treated group received orally 0.36 mg/kg BW indomethacin.‎ Ear weight ‎difference was calculated as an indicator ‎of anti-inflammatory. For the second experiment, the carrageenan-induced paw edema‎, a ‎similar experimental design was followed, but carrageenan (50 ‎mg/kg BW of 1% solution) ‎was ‎administered intra-dermally‎ in the right hindpaws.‎ Paw skin thickness difference ‎and differential white blood ‎cells (WBCs) count, along with the ‎quantification of prostaglandin E-2 ‎‎(PGE-2) and ‎interleukin-6 (IL-6) in serum samples, were used as indicators of anti-inflammatory.‎ Results showed that xylene exposure led ‎to a significant ear weight increase, ‎indicative of ‎inflammation. Conversely, the ‎apigenin-treated group demonstrated a ‎reduction in ear ‎weight compared to the positive control group. Similarly, carrageenan ‎administration resulted ‎in a substantial ‎increase in paw skin thickness and elevated levels of ‎WBCs count, PGE-2, ‎and IL-6. ‎Apigenin treatment significantly mitigated these ‎inflammatory markers, ‎‎outperforming indomethacin in PGE-2 ‎and IL-6‎. This study provides evidence supporting the potential ‎of P. oleracea-derived ‎apigenin as an effective anti-inflammatory agent, showing ‎comparable or better ‎efficacy ‎than indomethacin‎‎‎‎‎.

Grape Pomace Polyphenols Reduce Acute Inflammatory Response Induced by Carrageenan in a Murine Model.

Grape pomace (GP), a by-product of wine production, contains bioactive polyphenols with potential health benefits. This study investigates the anti-inflammatory properties of a polyphenolic fraction derived from GP, obtained by ultrasound-microwave hybrid extraction and purified using ion-exchange chromatography. In the inflammation model, mice were divided into six groups: intact, carrageenan, indomethacin, and three GP polyphenols treatment groups. Paw edema was induced by subplantar injection of carrageenan, and the GP polyphenols were administered intraperitoneally at doses of 10, 20, and 40 mg/kg. The anti-inflammatory effect was evaluated by measuring paw volume, and expression of inflammatory markers: cyclooxygenase-2 (COX-2), myeloperoxidase (MPO), and cytokines (IL-1β and IL-6), along with lipid peroxidation levels. The GP polyphenols significantly reduced paw edema and expression levels of COX-2, MPO, and cytokines in a dose-dependent manner effect, with the highest dose showing the greatest reduction. Additionally, lipid peroxidation levels were also decreased by GP polyphenols treatment at doses of 10 and 20 mg/kg. These findings suggest that ultrasound-microwave extraction combined with amberlite purification proved to be effective in obtaining a polyphenolic-rich fraction from GP. Thus, GP polyphenols may serve as a natural anti-inflammatory and antioxidant agent for treating inflammation and oxidative stress-related diseases.

Anti-inflammatory effect of Polyherbal Formulation

Inflammation is body’s defence mechanism. There are various inflammatory and pro-inflammatory factors released in blood after injury. Prevalence of diseases associate with chronic inflammation will increase persistently in next 30 years. 3 in 5 people died with inflammation. Currently various synthetic treatments available but have many side effects. In this view, present study was designed to prepare a promising anti-inflammatory treatment from natural source. Anti-inflammatory effect of polyherbal formulation [prepared from ethanolic extracts of Hugonia mystax and Blumea lacera (1:1)] was evaluated against carrageenan and formalin induced paw oedema. Preliminary phytochemical screening revealed that phenolic acids, flavonoids, tannins, present in formulation. Acute oral toxicity was performed as per OECD guideline, 200 mg/kg and 400mg/kg was selected as lower dose and higher dose respectively. Paw oedema and paw thickness were assessed in all groups. Paw oedema and paw thickness increase in disease control group and significantly decrease in all treatment groups. It is concluded that polyherbal formulation have anti-inflammatory potential due to polyphenols, saponin and terpenoids. Further potent compounds can be isolated for preparation of formulation and clinical trials may be performed.

Assessment of acute toxicity, genotoxicity, and anti-inflammatory activity of SteLL, a lectin from Schinus terebinthifolia Raddi. Leaves, in mice

Ethnopharmacology relevanceSchinus terebinthifolia Raddi (Anacardiaceae), known as Brazilian pepper tree, stands out as a medicinal plant widely used in traditional medicine. The leaves are popularly used as anti-inflammatory agent and to relieve inflammatory conditions such as bronchitis, ulcers, and wounds, for example. Aim of the studyThe present study evaluated the acute toxicity, genotoxicity, and anti-inflammatory activity of S. terebinthifolia leaf lectin (SteLL) in mice (Mus musculus). Materials and methodsIn the acute toxicity assay, the animals were treated intraperitoneally (i.p.) or orally (per os) with a single dose of 100 mg/kg. Genotoxicity was assessed by the comet and micronucleus assays. Carrageenan-induced peritonitis and paw edema models were used to evaluate the anti-inflammatory effects of SteLL (1, 5 and 10 mg/kg, i.p.). ResultsNo animal died and no signs of intoxication or histopathological damage were observed in the acute toxicity assay. Genotoxic effect was not detected. In peritonitis assay, SteLL reduced in 56–69% leukocyte migration to the peritoneal cavity; neutrophil count decreased by 25–32%, while mononuclear cell count increased by 67–74%. SteLL promoted a notable reduction of paw edema after 4 h (61.1–63.4%). Morphometric analysis showed that SteLL also decreased the thickness of epidermal edema (30.2–40.7%). Furthermore, SteLL decreased MPO activity, plasma leakage, NO release, and modulated cytokines in both peritoneal fluid and paw homogenate. ConclusionSteLL did not induce acute toxicity or genotoxicity in mice and stands out as a promising candidate in the development of new phytopharmaceuticals with anti-inflammatory action.

Isolation, Chemical Modification and In vivo Pharmacological Screening of Piperine and its Derivatives

Piperine (1) extracted from black pepper was transformed into its derivatives piperic acid (2) and piperonal (3) with good yields (69-76%). Animal models were used to examine the compounds' in vivo peripheral as well as central analgesic and anti-inflammatory effects. In the peripheral analgesic experiment, compound 2 displayed remarkable action having writhing inhibition by 78% at 50 mg/kg dose, superior to that of 1 (74% writhing inhibition) when administered at the same dose and compared with standard diclofenac sodium (85%). Concerning central analgesic efficacy, piperonal outperformed compounds 1 and 2 at 25 mg/kg dose, with % tail-flick elongation times of 194%, 178%, and 178% at 30, 60, and 90 min, respectively. Conversely, at 50 mg/kg dose, piperic acid exhibited the highest activity, demonstrating % tail-flick elongation times of 231%, 213%, and 206% at 30, 60, and 90 min, respectively, as compared to the standard morphine (278%, 247%, and 160%) in the same duration. In anti-inflammatory property evaluation, piperonal portrayed outstanding effects with paw edema inhibitions of 57%, 66%, 76%, and 81%, respectively from 1st hour onwards, compared to standard aceclofenac (61%, 72%, 78%, and 89%) and parent compound piperine (20%, 34%, 51%, and 60%). This study suggests that piperine derivatives could act as promising leads for future drug development. Dhaka Univ. J. Pharm. Sci. 23(1): 13-22, 2024 (June)

Anti-Inflammatory and Antioxidant Properties of the Mucuna sanjappae Seeds in the Rat Model and In Vitro Assays

The Fabaceae (Leguminosae) plant family contains several species of the Mucuna Adans. genus possessing therapeutic potential and growing widely in tropical and sub-tropical regions. In this research, we investigated the anti-inflammatory and antioxidant properties of the extract from the Mucuna sanjappae Aitawade &amp; S.R.Yadav seeds. Initially, we conducted an in vitro anti-inflammatory activity test using the bovine serum albumin anti-denaturation assay and found promising dose-dependent activity. Subsequently, we performed an in vivo anti-inflammatory and antioxidant study on a rat paw edema model induced by carrageenan. Three different doses of M. sanjappae seed water extract (50, 100 and 200mg/kg B/W) were used for the study (Oral administration). Edema measurement was carried out at 0, 2, 4 and 6 hr intervals. Dose dependent inhibition in edema in the M. sanjappae seed extract treatment group was observed with maximum activity for 200mg/kg B/W dose at 4 hr (53.49%). Standard drug showed maximum edema inhibition (54.94%) at 6hr. Our results also showed that, M. sanjappae seed extract inhibited pro-inflammatory cytokine TNF-α and increases anti-inflammatory cytokine IL-10 with increased level of blood serum antioxidants. Phytochemical analysis for secondary metabolites including polyphenol, flavonoids, phytic acid, proanthocyanidin, tannin and saponin was also quantified which might be the responsible component for biological activities under study.

Exploring the therapeutic potential of ethanol extract of Erythrina fusca Lour. roots as an analgesic, antipyretic, and anti-inflammatory agent in experimental animals

Erythrina fusca Lour., renowned in traditional medicine for its soothing, analgesic, anti-inflammatory, and neuroinhibitory properties, is the focus of our investigation. Expanding on its traditional applications, we assessed the analgesic, anti-inflammatory, and antipyretic characteristics of the ethanol extract from E. fusca root (REEF). Administered orally to mice at varying doses (50, 100, and 150 mg/kg for pain and fever reduction; 100, 150, and 200 mg/kg for anti-inflammatory experiments), REEF's effects were systematically evaluated through parameters such as reaction time, pain inhibition ratio, COX2 and PGE2 levels, rectal temperature, fever inhibition ratio, paw diameter, paw edema inhibition ratio, and inflammatory cytokines. Results reveal that REEF consistently reduced licking and biting time (p &lt; 0.05) in response to formalin-induced pain in mice. Particularly noteworthy was the more pronounced reduction in COX2 and PGE2 during the late phase, with the most significant decrease observed at the 150 mg/kg REEF treatment (p &lt; 0.05). The licking time graph substantiated the analgesic efficacy of REEF, illustrating simultaneous and sustained pain reduction over time. Moreover, REEF significantly alleviated fever (p &lt; 0.05) in mice, with the most substantial effect observed three hours post-yeast injection. REEF not only efficiently reduced body temperature but also countered the fever-inducing effects of yeast at evaluated time points (p &lt; 0.05). In the context of carrageenan-induced inflammation, paw swelling markedly diminished after 4 and 5 hours (p &lt; 0.05). Notably, at the 5-hour mark, REEF treatment at 150 mg/kg dose exhibited significantly superior anti-inflammatory effects (p &lt; 0.05). Additionally, mice treated with REEF (100, 150, and 200 mg/kg) exhibited a considerable decrease (p &lt; 0.05) in serum concentrations of TNF-?, IL-1?, and IL-6 compared to the control treatment. The ethanol extract from Erythrina fusca roots demonstrates substantial potential for pain relief, fever reduction, and anti-inflammatory effects, positioning it as a promising herbal resource for the research and development of natural medicinal products with these therapeutic properties.

Recent Advancements and Developments in the Biological Importance of Pyrimido[4,5‐b]Quinoline Scaffolds

AbstractThis study highlights the biological efficiency of pyrimido[4,5‐b]quinolines as inhibitors of cancer cell growth and antioxidants and anti‐inflammatory properties, etc. Recent research studies have revealed their promising biological activity to inhibit the growth of many disease‐causing yeasts, fungi, and bacteria. The structural composition greatly affects the biological effectiveness, as these compounds exceed the value of some standard compounds against pathogenic microbes. The antioxidant potential of these derivatives is also explored. Several glycosylated and non‐glycosylated derivatives exhibited potent free radical scavenging activity and protected against DNA damage, exceeding reference standards in some cases. Furthermore, the review examines the anti‐inflammatory and analgesic properties of pyrimidoquinoline derivatives. Studies suggest their efficacy is comparable to known drugs like diclofenac and aspirin in carrageenan‐induced paw edema and hot plate tests. Pyrimidoquinoline derivatives also demonstrate promising anticancer activity. While some have minimal effects, others exhibit notable activity against various human cancer cell lines. This review documents over two decades of research, covering the period from 2000 to 2024. Overall, pyrimidoquinoline derivatives signify an auspicious class of compounds with therapeutic potential across various areas. Further research is necessary to elucidate their mechanisms of action, optimize their efficacy and selectivity, and assess their safety profiles for clinical development.

Topical diosmetin attenuates nociception and inflammation in a ultraviolet B radiation-induced sunburn model in mice.

Burns are a global health problem and can be caused by several factors, including ultraviolet (UV) radiation. Exposure to UVB radiation can cause sunburn and a consequent inflammatory response characterised by pain, oedema, inflammatory cell infiltration, and erythema. Pharmacological treatments available to treat burns and the pain caused by them include nonsteroidal anti-inflammatory drugs (NSAIDs), opioids, antimicrobials and glucocorticoids, which are associated with adverse effects. Therefore, the search for new therapeutic alternatives is needed. Diosmetin, an aglycone of the flavonoid diosmin, has antinociceptive, antioxidant and anti-inflammatory properties. Thus, we evaluated the antinociceptive and anti-inflammatory effects of topical diosmetin (0.01, 0.1 and 1%) in a UVB radiation-induced sunburn model in mice. The right hind paw of the anaesthetised mice was exposed only once to UVB radiation (0.75J/cm2) and immediately treated with diosmetin once a day for 5days. The diosmetin antinociceptive effect was evaluated by mechanical allodynia and pain affective-motivational behaviour, while its anti-inflammatory activity was assessed by measuring paw oedema and polymorphonuclear cell infiltration. Mice exposed to UVB radiation presented mechanical allodynia, increased pain affective-motivational behaviour, paw oedema and polymorphonuclear cell infiltration into the paw tissue. Topical Pemulen® TR2 1% diosmetin reduced the mechanical allodynia, the pain affective-motivational behaviour, the paw oedema and the number of polymorphonuclear cells in the mice's paw tissue similar to that presented by Pemulen® TR2 0.1% dexamethasone. These findings indicate that diosmetin has therapeutic potential and may be a promising strategy for treating patients experiencing inflammatory pain, especially those associated with sunburn.

Sub-acute toxicity, antinociceptive and anti-inflammatory effects of Mucuna pruriens L. leaves in experimental rodents

Ethnopharmacological relevanceMucuna pruriens L is a wild and cultivated leguminous plant which have been used as an aphrodisiac, diuretic, nerve tonic, and antiarthritic agent. AimTo evaluate the toxicity, antinociceptive, and anti-inflammatory activities of M. pruriens (EEMP) ethanol extract in experimental models. MethodsM. pruriens dried leaves were extracted using aqueous ethanol (30:70). Tests for acute and subacute toxicity were conducted on rats and mice. Mice were used in hotplate, acetic acid, and formalin models to test the antinociceptive activity of EEMP. The anti-inflammatory properties of EEMP (25, 100, and 400 mg/kg) were assessed egg albumin, carrageenan, and formalin-induced oedema models. The study examined the anti-inflammatory mechanism of EEMP (25–400 mg/kg) in rats with an air pouch caused by carrageenan. Air pouch exudates were tested for total leucocytes and differential cell counts, TNF-α, IL-6, myeloperoxidase activity, malondialdehyde, nitrites, and reduced glutathione (GSH). ResultsThe acute oral toxic dose of EEMP is greater than 2000 mg/kg. There were no significant behavioral, hematological or biochemical alterations seen after 14-days repeated administration of EEMP (200, 400 and 800 mg/kg) in mice. The EEMP demonstrated significant antinociceptive activity in hotplate, acetic acid and formalin-induced nociception in mice. The EEMP significantly and dose dependently reduced paw oedema at 2, 4 and 96 h in the egg-albumin, carrageenan- and formalin-induced paw oedema, respectively. Exudates volume, inflammatory cell counts, TNF-α, IL-6, myeloperoxidase, malondialdehyde and nitrites were significantly reduced, while GSH increased in carrageenan-air pouch of EEMP-treated rats. ConclusionMucuna pruriens leaves ethanol extract demonstrated good safety profile as well as antinociceptive and anti-inflammatory activity through mechanisms related to inhibition of oxidative stress and pro-inflammatory cytokines as well as lysosomal membrane stability.

Metabolomics and anti-inflammatory activity of Commiphora madagascariensis jacq. leaves extract using in vitro and in vivo models

C. madagascariensis, an unexplored species of Burseraceae is used by local population for the management of inflammation and throat pain. The disease alleviation by this plant could be due to the presence of rich repository of active compounds with various pharmacological importances. In this study, therefore, the profiling of metabolites and isolation of active compounds of C. madagascariensis was performed. Furthermore, the ethanol, ethyl acetate extracts and a selected active compound was subjected for in vitro and in vivo anti-inflammatory activities. Metabolomic analysis identified and quantified 116 metabolites from leaves, young stem and gum-resins of C. madagascariensis (Burseraceae) followed by multivariate PCA analysis. NMR, GC–MS and HPLC were used to analyze primary and secondary metabolites. Subsequently, five main isolated compounds were identified as trimethoxy tetrahydrobenzo dioxolo isochromene (TTDI), butyl phenol, butyl propionate phenol, germacrone and β-elemenone. Amongst them, TTDI was found to be a novel compound. Hence, a process was developed to obtain the enriched fraction of TTDI in ethanol and ethyl acetate extracts of leaves. Furthermore, TTDI and extracts were subjected for their in vitro anti-inflammatory activity in LPS sensitized murine splenocytes. The results showed that TTDI and both extracts significantly suppressed the levels of pro-inflammatorycytokines (TNF-α, IFN-γ). Interestingly, the suppression of pro-inflammatory cytokines was evenmore significant by the similar concentration of TTDI when compared with colchicine. However, the level of anti-inflammatory cytokine (IL-10) was found to be unchanged. Additionally, in vivo anti-inflammatory study revealed a significant reduction in carrageenan induced paw edema by TTDI and both the extracts. In the docking study, TTDI was more active than colchicine with strong binding affinity to COX-2, PLA2, and 5β reductase. Our results highlighted that the presence of metabolites with medicinal and nutraceutical importance in C. madagascariensis, could provide opportunities for the development of a new plant-based therapeutics for inflammation.

Evaluation of the antiasthmatic properties of stems and leaves of Waltheria indica L. (Malvaceae): Focus on antioxidant and anti-inflammatory activity, and quantification of phenolic compounds

BackgroundWaltheria indica L. (Malvaceae) has a long history of use in traditional medicine for treating inflammation and asthma. This study aimed to evaluate the antiasthmatic properties of the hydroethanolic extract derived from the stems and leaves of W. indica. MethodPhytochemical analysis was conducted using thin-layer chromatography, and phytoconstituents were quantified using appropriate techniques. The antioxidant activity was determined through DPPH radical scavenging, ABTS+ radical cation decolorization, ferric ion reduction, and lipid peroxidation inhibition. The fractions' acute general toxicity was assessed following the guidelines of OECD 423. The in vitro anti-inflammatory activity was evaluated by inhibiting the 15-lipoxygenase and phospholipase A2 (PLA2), while the in vivo evaluation involved carrageenan-induced paw edema in mice at doses of 100, 200, and 400 mg/kg of body weight (b.w.). ResultsThe study revealed a total phenolic content of 116.03 ± 1.02 mg TAE/g in the residual fraction and 146.62 ± 2.02 mg TAE/g in the hydroethanolic extract. The extract and fractions also exhibited significant flavonoid content. The fractions' lethal dose was estimated to equal 5000 mg/kg b.w. Furthermore, the extract and fractions demonstrated substantial antioxidant and anti-inflammatory effects. ConclusionThe observed pharmacological activities provide scientific evidence for the traditional medicinal use of the leafy stems of W. indica in treating asthma.

The potential utility of (2S,4R)-4-[18F] fluoroglutamine as a novel metabolic imaging marker for inflammation explored by rat models of arthritis and paw edema.

(2S,4R)-4-[18F]fluoroglutamine ([18F]FGln) is a promising metabolic imaging marker in cancer. Based on the fact that major inflammatory cells are heavily dependent on glutamine metabolism like cancer cells, we explored the potential utility of [18F]FGln as a metabolic imaging marker for inflammation in two rat models: carrageenan-induced paw edema (CIPE) and collagen-induced arthritis (CIA). The CIPE model (n = 4) was generated by injecting 200 μL of 3% carrageenan solution into the left hind paw three hours before the PET. The CIA model (n = 4) was generated by injecting 200 μg of collagen emulsion subcutaneously at the tail base 3-4 weeks before the PET. A qualitative scoring system was used to assess the severity of paw inflammation. After a CT scan, 15.7 ± 4.9 MBq of [18F]FGln was injected via the tail vein, followed by a dynamic micro-PET scan for 90 minutes under anesthesia with isoflurane. The standard uptake value of [18F]FGln was measured by placing a volume of interest in each paw. The non-injected right hind paws of the CIPE model rats served as controls for both models. The paws with CIA were pathologically examined after PET. In CIPE models, uptake in the injected paw was higher compared to the non-injected paw by 52-83%. In CIA models, uptake in the paws with severe inflammation was higher than the averaged controls by 54-173%, while that with mild and no inflammation was slightly higher (33%) and lower (-7%), respectively. Combined overall, the [18F]FGln uptake in CIA showed a significant positive correlation with inflammation severity (r = 0.88, P = 0.009). The pathological findings confirmed profound inflammation in CIA. [18F]FGln uptake was increased in both acute and chronic inflammation, and the uptake level was significantly correlated with the severity, suggesting its potential utility as a novel metabolic imaging marker for inflammation.

Nanoencapsulation-mediated curcumin and its incorporation in nutraceutical cookies: Cell viability, bioavailability, and anti-inflammatory activity studies

The anti-inflammatory activity of curcumin, Curcuma longa, is known, however, its low bioavailability is a limiting factor. The nanoencapsulated curcumin was developed and its spherical particle size ∼20 nm was confirmed using TEM. An in vitro study was performed to determine the cytotoxicity of standard and nanoencapsulated curcumin, and their effect on lipopolysaccharide-induced nitric oxide, and IL-6 production in RAW 264.7 cells. The plasma bioavailability of nanoencapsulated curcumin was 12 times higher compared to native curcumin in Swiss albino mice. The anti-inflammatory activity of native curcumin and nanoencapsulated curcumin was compared in the carrageenan-induced paw edema model. A paw thickness reduction of 33.7 % and 46 % was observed with the treatment of native curcumin and nanoencapsulated curcumin, respectively and the histology studies validated the results. Further, the in vitro COX-1 inhibition of cookies incorporated with nanoencapsulated curcumin was 20 and 24 % higher than native curcumin and control cookies, respectively indicating their nutraceutical application.

Evaluation of anti-nociceptive and anti-inflammatory activities of solvent fraction of the roots of Echinops kebericho Mesfin (Asteraceae) in mice model.

The present study was aimed at investigating the antinociceptive and anti-inflammatory activities of the solvent fractions of the roots ofEchinops keberichoMesfin in rodent models of pain and inflammation. Successive maceration was used as a method of extraction using solvents of increasing polarity: methanol and water. Ethyl acetate, chloroform and distilled water were used as solvents of the fraction process. Swiss albino mice models were used in acetic acid induced writhing, hot plate, carrageenan induced paw edema and cotton pellet granuloma to assess the analgesic and anti-inflammatory activities. The test groups received different doses (100 mg/kg, 200 mg/kg and 400 mg/kg) of the three fractions (chloroform, ethyl acetate and aqueous). The positive control groups received ASA (150 mg/kg) for the writing test, morphine (10 mg/kg) for the hot plate method, diclofenac Na for carrageenan-induced paw edema, and dexamethasone (10 mg/kg) for granuloma, while the negative control group received distilled water. EA fraction at all test doses employed (100 mg/kg, 200 mg/kg, and 400 mg/kg) showed statistically significant (p<0.05, p<0.01, p<0.001 respectively) analgesic and anti-inflammatory activities in a dose-dependent manner. The AQ fraction on the other hand produced statistically significant (p<0.05, p<0.012) analgesic and anti-inflammatory activities at the doses of 200 mg/kg and 400 mg/kg, while the CH fraction exhibited statistically significant (p<0.05) analgesic and anti-inflammatory activity at the dose of 400 mg/kg. In general, the data obtained from the present study elucidated that the solvent fractions of the study plant possessed significant analgesic and anti-inflammatory activities and were recommended for further investigations.

Comparative analysis of medicinal attributes between Lignosus cameronensis and its sister species

Lignosus cameronensis holds promise for exploration given its morphological likeness to the renowned Lignosus rhinocerus, or tiger milk mushroom. Investigating its potential medicinal and industrial applications addresses a significant knowledge gap in this field. A comparative analysis with other Lignosus species and cultivars provides insights into biopharmacological potential. L. cameronensis cold water extract (LC-CWE) displayed moderate antioxidant activity, demonstrating promising Trolox equivalent antioxidant ­capacity. Variable cytotoxicity was observed in different cell lines, with an IC50 of 215 μg/ml against breast cancer cells (MCF-7) cells. LC-CWE exhibited anti-inflammatory potential with an ED50 of 60 mg/kg in a λ-carrageenan-induced rat paw oedema model. Comparison with other Lignosus species and cultivars emphasised LC-CWE’s distinct attributes, including high phenolic content and moderate antioxidant capacity. LC-CWE displayed potential in selectively inhibiting MCF-7 cells and reducing inflammation, highlighting its medicinal promise. This research expands our understanding of L. cameronensis and underscores the need for further mechanistic exploration.

Phenolic Composition of Crataegus monogyna Jacq. Extract and Its Anti-Inflammatory, Hepatoprotective, and Antileukemia Effects

Crataegus monogyna (C. monogyna) is a prominent plant used in Moroccan traditional medicine. This study investigated the phenolic composition and the anti-inflammatory, the hepatoprotective, and the anticancer activities of a hydroethanolic extract of C. monogyna leaves and stems. Ultra-high-performance liquid chromatography identified the phenolic profile. The in vitro anticancer activity was evaluated using the MTT assay on HL-60 and K-562 myeloleukemia cells and liver (Huh-7) cell lines. The anti-inflammatory effect was assessed in vivo using carrageenan-induced paw edema in rats. The hepatoprotective effect at 300 and 1000 mg/kg doses against the acetaminophen-induced hepatotoxicity on rats was studied for seven days. Additionally, molecular docking simulations were performed to evaluate the extract’s inhibitory potential against key targets: lipoxygenase, cytochrome P450, tyrosine kinase, and TRADD. The extract exhibited significant cytotoxic activity against K-562 and HL-60 cells, but not against lung cancer cells (Huh-7 line). The 1000 mg/kg dose demonstrated the most potent anti-inflammatory effect, inhibiting edema by 99.10% after 6 h. C. monogyna extract displayed promising hepatoprotective properties. Procyanidin (−7.27 kcal/mol), quercetin (−8.102 kcal/mol), and catechin (−9.037 kcal/mol) were identified as the most active molecules against lipoxygenase, cytochrome P450, and tyrosine kinase, respectively. These findings highlight the untapped potential of C. monogyna for further exploration in treating liver damage, inflammation, and leukemia.