جستجوی مقالات مرتبط با کلیدواژه "rats" در نشریات گروه "دامپزشکی"

Acute pancreatitis (AP) is a critical disease with a high mortality rate due to the necrosis of the pancreas and other organs. We aimed to study the effects of thiamine and ZnO nanoparticles (NPs) in treating AP. Fifty male rats, with an average weight of 28 to 32 grams, were randomly divided into five groups: 1: Control group, 2: L-arginine group (300 mg/100g), 3: Thiamine group (70 mg/kg), 4: ZnO NPs group (1 mg/kg), 5: Combination treatment group: L-arginine (300 mg/100g) + thiamine (70 mg/kg) + ZnO NPs (1 mg/kg). After stereological examination of tissue sections and measurement of biomarkers, the data were analyzed at a significance level of p≤ 0.05. According to the results, in the L-arginine treatment group, the thickness of the mucosal, muscular, and adventitial layers decreased in comparison to the total thickness (p≤ 0.05). Additionally, values of the surface area and density of the mucosal and muscular layers decreased, as well as the total values of these, compared to the control group. The mentioned parameters increased in the combination treatment group. Evaluation of cholesterol showed a significant increase between the control group and groups 4 and 5. Analysis of ALT and AST factors indicated a significant increase in the level of AST in L-arginine group compared to the control group, and a significant decrease in the level of ALT in comparison between the thiamine and ZnO NPs groups and the L-arginine group. Based on the results of the present research, thiamine and ZnO NPs manifested enhancing effects on the values of thickness, surface area, volume density, and level of ALT.

The anthracycline derivative, doxorubicin is a cytotoxic agent with proven efficacy in various malignancies such as breast cancer, acute leukemia etc. The clinical usefulness has been limited due to its dose dependent cardiac toxicity. Our objective was to evaluate the role of Chlorophytum borivilianum L. on doxorubicin-induced cardiotoxicity in rats and to predict the effect of Chlorophytum borivilianum L. by in-silico and in vivo methods. In-vitro studies were conducted on Chlorophytum borivilianum L. Cardiotoxicity was produced by cumulative administration of x doxorubicin (Dox-15 mg/kg ip.for two weeks). Ethanolic extract and fractions of Chlorophytum borivilianum L. (250 and 500 mg/kg, p.o) were administered as pretreatment for two weeks followed by Doxorubicin 2.5 mg/kg i.p. on alternative day for two weeks. The parameters such as body weight, food and water intake, cardiac specific markers like creatine kinase (CK-MB), lactate dehydrogenase (LDH) and cardiac Troponin-I (cTnl), ECG changes, antioxidant parameters like superoxide dismutase (SOD), glutathione (GSH), catalase (CAT) and lipid peroxidation (MDA) were monitored. Heart histopathological studies were also carried out to evaluate myocardial toxicity. As a result of Dox treatment, cardiomyopathy develops, which is characterised by an increase in cardiac biomarkers and a deficiency in antioxidant enzymes. By lowering the elevated levels of biomarker enzymes like LDH and CK-MB and the absence of cTnI, pretreatment with the EECB (500mg/kg) significantly protected the myocardium from the toxic effects of Dox. Additionally, the EECB increased the reduced levels of GSH, SOD, and CAT while decreasing the elevated levels of malondialdehyde (MDA) in cardiac tissue.

Wound healing and finding a solution for fast healing are among of the major issues of today’s world. This study aimed to assess the effect of Tragacanth gum hydrogel as a three-dimensional scaffold of MSCs along with a wound dressing of human amniotic membrane in the healing of full-thickness skin wounds in rat. In this study, 54 Albino female rats (150 g) were divided into control, hydrogel, and hydrogel+stem cell groups. Under general anesthesia, two bilateral full-thickness wounds were created on the dorsal area by a 9.8-millimeter biopsy punch. Rats were euthanized on days 3, 10, and 21 for histopathology and cell tracking by PCR evaluation of tissue samples. The histopathological results showed that no significant difference was seen on days 3 and 21, and there were significant differences only on day 10. In terms of epithelialization, the treatment groups were significantly different from the control group  hydrogel+MSCs had a statistically significant difference with the control group in terms of granulation tissue formation. Cell tracking results with PCR on days 3, 10, and 21 in the hydrogel+MSCs group showed that MSCs were found only on day 3. The results of the present study showed that the use of stem cells together with the Tragacanth gum hydrogel as a scaffold and the use of human amniotic membrane as a dressing can cause fast healing of full-thickness wounds.

Thymoquinone (TQ) is the main biologically active substance of Nigella sativa (black seeds). It has anti-cancer, anti-inflammatory, anti-diabetic, anti-oxidative and anti-nociceptive properties. This study was aimed to explore the effect of TQ on acetic acid-induced visceral nociception. The central mechanisms of the effect of TQ were investigated using cannabinergic (AM251) and α2-adrenergic (yohimbine [Yoh]) antagonists. The lateral ventricle of the brain was cannulated for intracerebroventricular (ICV) injections. Visceral nociception was induced by intra-peritoneal (IP) injection of acetic acid (1.00% in a volume of 1.00 mL). Measuring the latency time to the first writhing appearance and counting the number of writhing in 5-min intervals for a period of 60 min were performed. Locomotor activity was determined using an open-field test. Oral administration (PO) of 2.50 and 10.00 mg kg-1 TQ increased the latency time to the first writhing appearance and decreased the number of writhing. The AM251 (5.00 µg per rat; ICV) and Yoh (5.00 µg per rat; ICV) partially prevented TQ (10.00 mg kg-1; PO)-induced anti-nociception. Locomotor activity was not altered by these treatments. The results of the present study showed that TQ had the ability to reduce visceral nociception caused by IP injection of acetic acid. The central mechanisms of this action of TQ might be partially mediated by cannabinergic and α2-adrenegic receptors.

This study explored the potential contribution of Orx1R within vlPAG to the learning and memory of animals with chronic migraine-like pain. Migraine was induced by repeated i.p. administration of nitroglycerin (5 mg/kg). Passive avoidance adeptness was evaluated in the shuttle box maze. The spatial memory performance was estimated using MWM tests. In the MWM task, NTG-injected rats revealed an imperative increase in escape latency and traveled the distance to catch the stage and a decrease in the time spent to pass into the goal zone in comparison to the control animals. Such NTG-evoked responses were attenuated by the post-treating intra-vlPAG injection of orexin A at 100 but not 25 and 50 pM. Furthermore, in the shuttle box test, NTG-treated rats showed eversion memory retrieval impairment as reflected by decreased phase through latency and longer time spent in the black chambers of the maze. Administration of orexin A at 50 and 100 pM could suppress NTG-related eversion memory deficiency in rats. However, orexin A (100 pM) aptitude to preserve memory performance, in both MWM and shuttle box tasks, was significantly prevented by SB334867 (20 nM) as an Orx1R antagonist. Overall, these data support the role of Orx1R within vlPAG to modulate migraine-related cognition deficits in rats.

This experiment was carried out on diabetic rats (male Wistar rats with 210±10 g body weight) in a complete randomized design with seven replications at the Laboratory of Pharmacology group, Veterinary Faculty, Shiraz University during 2022. In the present study, A. brachycalyx leaf extract was used for the biosynthesis of silver nanoparticles (AgNPs). This study was designed to evaluate the effect of A. brachycalyx leaf extract and its silver nanoparticles on diabetic rat induced by Streptozotocin. The synthesized AgNPs using A. brachycalyx (ABLE-AgNPs) were characterized through UV-visible spectroscopy followed by X-ray diffraction, Transmission Electron Microscopy and Fourier Transform Infrared Spectroscopy and Dynamic Light Scattering. A. brachycalyx extract and ABLE-AgNPs were investigated for their activities as an anti-diabetic agent in rats. The investigated treatments includes: 1. Healthy control, 2. Solvent control, 3. Diabetic rats that received A. brachycalyx extract with a dose of 100 mg/kg, 4. Diabetic rats that received A. brachycalyx extract with a dose of 200 mg/kg, 5. Diabetic rats that received 30 mg/kg of A. brachycalyx extract-AgNP and 6. Diabetic rats that received 60 mg/kg of A. brachycalyx extract-AgNP. Transmission electron microscopy revealed that the synthesized particles are found to be in range of 4–25 nm size. The dyslipidemic conditions as seen in the diabetic control were found to be significantly improved in AgNPs-treated diabetic rats. Furthermore, AgNPs reduced the blood glucose level over the period of treatment. The improvement in the body weight was also found to be evidence for A. brachycalyx extract-mediated AgNPs as a potential antidiabetic agent against STZ diabetic rats. The highest weight of the rat at the end of the treatment stages belonged to treatment 6 (60 mg/kg silver nanoparticles). Treatment 2 (diabetic and not receiving medicine) showed a decrease in growth and weight. The treatment 2 showed an increasing trend in the amount of blood glucose level. While the treatments using A. brachycalyx extract and nanoparticle showed the reduction trend of blood glucose level. Blood glucose level reduction in treatment 6 was more than other treatments (71%). This study revealed that the AgNPs are found to be safe and environmentally friendly, hence, these AgNPs can be considered in treating diabetes associated syndrome.

Carbimazole is a widespread drug utilized for treating hyperthyroidism. However, carbimazole usage could be associated with adverse effects such as liver damage and nephritis in rats. At the same time, turmeric, as a medical plant, has many antioxidant effects against liver and kidney toxicity. This study aimed to explore the protective effect of turmeric against carbimazole–induced toxicity in rats. The experiment was carried out on 24 male Wistar rats. They were separated into four groups, each with six animals, as follows: 1. Control group: represents a healthy animal, and each rat is only given standard food and distilled water for 30 days. 2. Carbimazole group: drenched orally 0.5 mg carbimazole daily for 30 days. 3. Turmeric group: drenched orally 100 mg turmeric powder daily for 30 days. 4. Carbimazole and turmeric group: drenched orally carbimazole 0.5 mg and turmeric 100 mg daily for 30 days. The study demonstrated a significant effect of turmeric powder in reducing the toxicity of carbimazole in both the kidney and liver biochemical parameters, in addition to the evidence of histological sections. Turmeric powder has the ability to reduce and prevent renal and hepatic toxicity induced by carbimazole overdose, which gives turmeric medical value.

This study considered the therapeutic efficacy of three different Artemisia species extracts on capsaicin-induced dental pulp pain and pain-associated changes in feeding behaviors in adult male Wistar rats. The animals were alienated into five groups (n=6), comprising: sham, capsaicin, and capsaicin groups pre-treated with hydroalcoholic extracts of A. sieberi, A.persica, and A.biennis. Pulpitis was evoked by intradental administration of capsaicin (100 µg). The plant extracts (200 mg/kg/ i.p.) were administered 10 min before capsaicin. Pain scores were recorded for forty min. Afterward, feeding behavior was evaluated within 6 hours. All extracts could suppress capsaicin-related dental pulp pain. Furthermore, capsaicin decreased the number of visits to the food and water ports of the feeding behavior evaluation device that led to a reduced amount and duration of meals consumed. These harmful effects of capsaicin on meal duration, and frequency were attenuated by A.persica. Moreover, capsaicin inhibitory effect on food intake and water consumption was suppressed by all the extracts. Taken together, the present study showed that Artemisia species extracts are useful in supressing capsaicin-induced pulpal pain and pain-induced feeding abnormalities.

The Basolateral Amygdala (BLA) has been shown to have an important role in food-related learning behaviors. Using a novel approach, we have evaluated the role of BLA in food preference and Food memory related to visual cues in rats. Thirty-two adult male Wistar rats, weighing 200–250 g, were used for the experiments. Electric lesion of BLA was produced by passing 1.5 mA of current for 7 s. Food-related behaviors and preferences were evaluated by using an automated apparatus. Geometric visual cues were also constructed. Food-deprived rats were presented with different diets in 6 consecutive trial performances. The number of visits, time consumed on each food zone and port, distance traveled in each visit, and the total amount of food eaten was evaluated. The changes in hippocampal c-Fos expression were determined by immunoblotting. The control sham group showed a high and low preference for biscuit and white flour, respectively. BLA lesion rats exhibited a shifted preference curve. In the sham group, a more significant amount of food consumption was associated with an increased number of references to each zone and port, along with more time spent there. Furthermore, a decrease in hippocampal c-Fos expression was observed in the BLA- lesion animals. Taken together, the basolateral amygdala has a significant role in rats’ food-matched visual-cue memory and high-calorie/sweetness preferences.

Diffuse nodular lymphoid hyperplasia is a rare gastrointestinal disease that can be diagnosed by multiple nodules in the small intestine, large intestine, or both. Immunodeficiency and infections are the common situations that lead to the diffusion of nodular lymphoid hyperplasia. For instance, Giardia lamblia and Helicobacter pylori are the major pathogens leading to this disorder. Diffuse nodular lymphoid hyperplasia leads to allergic reactions, immunodeficiency, and autoimmune diseases. Imunofan-RDKVYR Peptide-is a potential agent in regenerative medicine. The present study aimed to investigate morphological features of the aggregated lymphoid nodules of the small intestine after the Imunofan (IM) administration following Cyclophosphamide-induced immunosuppression. In total, 72 Wistar male rats were randomly divided into two groups (n=36). Group I was considered the control group, and group II was subjected to intramuscular injections (needle 21 G) of0.2 ml of normal saline following the Cyclophosphamide-induced immunosuppression on the2nd, 4th, 6th, 8th, and 10th days of the experiment. The animals in group II were injected with Cyclophosphamide at a dose of 200 mg/kg bodyweight to induce immunosuppression. The animals in the experimental group (n=36) were subjected to intramuscular injections (needle 21 G) of the 0.2 ml IM at a dose of 0.7μg/kg body weight on the 2nd, 4th, 6th, 8th, 10th days of the experiment. The results of the study indicated that on the 7th day in group II, the length and width of the aggregated lymphoid nodules increased, as well as the height and width of the lymphoid nodules and internodular zones as structural components of the lymphoid formations in the small intestine. In group I, by the 30th day of the experiment, the linear dimensions of the aggregated lymphoid nodules exceeded, but to a lesser extent than on the 7th day of the experiment which explains the ability of IM to neutralize the effects of Cyclophosphamide.  It should also be noted that the IM was performed to regenerate damaged cells which helped maintain the population of lymphocytes in the limb and led to an increase in linear dimensions (length and width) not only between the joint but also in the lymph nodes.

Chronic kidney disease (CKD) or acute kidney injury (AKI) causes impaired kidney function, leading to cognitive impairment, neuropathy, and cerebrovascular disease. Due to kidney damage, toxins stay in the blood rather than leaving the body through the urine, and brain function is affected by kidney-brain interaction. The present study aimed to investigate the protective effects of erythropoietin mimetic peptide (pHBSP) and infliximab on ischemic renal reperfusion injury. The experiment was performed on 70 white male Wistar laboratory rats which received recombinant erythropoietin, pHBSP, and infliximab. Under anesthesia, traumatic vascular clamps were applied to the left renal pedicle for 40 min, and nephrectomy was performed on the right. Functional tests and laboratory tests were performed 5 min and 24 h after the reperfusion.  Thereafter, 24 h after the surgery, the plasma creatinine and urea levels in the sham-operated animals were obtained at 45.9±0.8 mmol/L and 6.7±0.2 mmol/L, respectively. Plasma creatinine and urea levels in the control group animals were 102.63±3.6 mmol/L and 21.80±1.29 mmol/L, respectively. The administration of pHBSP and infliximab to the animals with ischemia-reperfusion kidney injury has a pronounced nephroprotective effect, as compared to erythropoietin. There was a significant decrease in blood levels of creatinine and urea, improvement of microcirculation in the kidney, normalization of glomerular filtration rate, and fractional sodium excretion. The results of the study demonstrated pointed to the prospects of pHBSP and infliximab administration in ischemia-reperfusion kidney injury and justified the feasibility of further research in this field.

Induction of cholestasis is one of the methods of liver fibrosis which causes the development of oxidative stress, increased expression of fibrogenic markers, excessive deposition of extracellular matrix, and finally the incidence of fibrosis. Plantago ovata is known as a rich source of various secondary metabolites such as phenolic compounds, flavonoids, alkaloids, trypanoids, and ascorbic acid.

the present study, the expression of TGF- β as a fibrotic marker and serum alkaline phosphatase (ALP) changes in cholestatic rats treated with P. ovata extract were evaluated.

In this study, 48 adult Wistar rats were used. The rats were randomly divided into eight groups of six animals each as follows: (1) healthy control group without bile duct ligation (BDL) surgery and treatment; (2–4) three healthy experimental plus P. ovata groups: rats without BDL, treated with P. ovata at dose levels of 100, 200, and 400 mg/kg body weight, respectively; (5) the BDL group: rats with BDL and treated with distilled water; and (6–8) the BDL plus P. ovata groups: rats with BDL and treated with P. ovata at dose levels of 100, 200, and 400 mg/kg body weight, respectively. The rats were treated with P. ovata extract for 45 consecutive days (once per day). After euthanasia and serum isolation, ALP enzyme level was measured. Moreover, the rat liver was fixed in 10% formalin buffer solution. The immunohistochemical study was performed by TGF-β antibody. Data analysis was performed using the One-way ANOVA and Kruskal-Wallis test and the Prism statistical program (p <0.0001).

The results showed a significant increase in the serum levels of ALP enzyme and TGF-β expression in BDL group. Treatment with P. ovata extract was able to significantly improve these changes in a dose-dependent manner.

The results of this study showed that P. ovata extract probably due to its phenolic compounds and its antioxidant effect has a protective effect on the liver and subsequently improves the increased serum ALP level and also reduced TGF-β expression

This study was designed to investigate the effects of peripheral [intraperitoneal (IP)] and central [intracerebroventricular (ICV)] administration of cinnamaldehyde on concentrations of blood glucose and serum insulin in the acute hyperglycemia induced by ketamine/xylazine. Yohimbine (a α2-adrenoceptor antagonist) was used alone and in combination with cinnamaldehyde to explore the α2-adrenergic receptor contribution. A total of 48 rats were divided into eight groups with six rats in each for IP administration of normal saline, vehicle, cinnamaldehyde (25.00, 50.00 and 100 mg kg-1), yohimbine (0.50 and 2.00 mg kg-1) and cinnamaldehyde plus yohimbine. These rats were used again for ICV administration 15 days after the completion of IP experiment. During this 15 days period, the lateral ventricle of the brain was surgically cannulated for ICV administration of normal saline, vehicle, cinna-maldehyde (25.00, 50.00 and 100 µg per rat), yohimbine (5.00 and 20.00 µg per rat) and cinnamaldehyde plus yohimbine. Blood glucose levels were measured from tail blood using a glucometer and serum insulin concentrations were determined via enzyme-linked immune-sorbent assay kit. The increased levels of blood glucose and the decreased concentrations of serum insulin were significantly decreased and increased, respectively, by separate and combined IP and ICV administrations of cinnamaldehyde and yohimbine. The systemic effects of these chemical compounds were significantly greater than the central ones. Based on the results, it can be argued that cinnamaldehyde has a potential to induce anti-hyperglycemic and antihypoinsulinemic effects. Peripheral and central α2-adrenegic receptors might be involved in these effects of cinnamaldehyde.

Objective- Medicinal plants and their active constituents are frequently used components for treating hyperglycemia. In the present study, the effect of curcumin was investigated on acute hyperglycemia and hyperinsulinemia induced by ketamine-xylazine in rats. To explore the possible mechanism, yohimbine (an α2-adrenergic receptor antagonist) was also used. Design- An experimental study. Animals– Forty-eight healthy male Wistar rats.  Procedures– Rats were divided into eight groups with six rats in each group to receive intraperitoneal injection of normal saline, oral administration of curcumin (12.5, 50 and 200 mg/kg), intraperitoneal injection of yohimbine (0.5 and 2 mg/kg), and oral administration of curcumin (12.5 mg/kg) plus intraperitoneal injection of yohimbine (0.5 mg/kg). After these treatments, ketamine (100 mg/kg) and xylazine (10 mg/kg) were intraperitoneally administered to all groups. Blood glucose concentration was measured at 60 and 5 min before and at, 30, 60, 90 and 120 min after ketamine-xylazine injection. Serum insulin concentration was measured by ELISA kit at the end of experiment. Results- Ketamin-xylazine increased blood glucose and decreased serum insulin. Curcumin lowered increased blood glucose and increased decreased serum insulin. Yohimbine prevented the hyperglycemia and hypoinsulinemia induced by ketamin-xylazine produced the same results as curcumin. Low doses of curcumin and yohimbine induced documented hypoglycemic and hyperinsulinemic effects. Conclusion and Clinical Relevance- Based on the results, it is concluded that curcumin improves hyperglycemia and hypoinsulinemia induced by ketamine- xylazine and α2-adrenergic receptor may involve in this effect.

This study investigated the toxic effects of dried pulverized Caloncoba echinata leaves on the hematology, blood biochemistry and vital organs of male albino rats. Twenty adult male rats were randomly divided into four groups of five rats each. Groups A, B and C were fed 25.00%, 15.00% and 5.00% of pulverized C. echinata leaves in feed respectively while group D was given normal feed for a four weeks period. Blood samples were collected at two weeks intervals for hematological and blood biochemistry analyses. Results showed a significant reduction of packed cell volume, hemoglobin concentration and total red blood cell counts in group B from week two to the end of the study. There was also a reduction of body weight and leukocytosis in groups A and B from week two to the end of the study. There was a significant reduction of albumin in group B when compared to the other groups after two weeks and a significant reduction in blood glucose concentration in group A after two weeks of the feeding of the leaves to the end of the study. Discrete areas of degeneration and necrosis of hepatocytes were observed in the rats of groups A and B and testicular atrophy in group B rats. It was concluded that feeding the rats with the pulverized C. echinata leaves led to a significant reduction of body weights and erythrocytic parameters, leukocytosis, hepatic and testicular injuries in the albino rats.

  Canine low-dose sepsis model provides a reliable setting to study innovative drugs. Lipopolysaccharides (LPS), a major constituent of bacterial outer membrane, have been demonstrated to play a critical role in the initiation of pathogenesis. Lipopolysaccharide-induced sepsis has been extensively studied in laboratory animals; but its importance has mainly remained unknown in dogs.

The aim of the present survey was to examine the effectiveness of quercetin, along with hydrocortisone on clinical and hematological alterations, and organ failure (liver and heart) in low-dose lipopolysaccharide-induced canine sepsis model.

For this purpose, fifteen clinically healthy mixed dogs were randomly divided into three equal groups. Lipopolysaccharide (0.1 μg/kg, IV) was injected to dogs in group A (control). Group B was similar to group A, but quercetin bolus (2 mg/kg, IV, once) was injected 40 minutes after LPS injection. Group C was similar to group B; however, hydrocortisone bolus (2 mg/kg, IV, once) was administered instead of quercetin. Serum levels of glucose, total protein, albumin, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), creatine kinase isoenzyme muscle/brain (CK-MB), lactate dehydrogenase (LDH) and cardiac troponin I (cTn-I) concentration were measured by commercial kits.

In control group, red blood cells (RBCs), hemoglobin (Hb), and hematocrit (HCT) significantly decreased and serum activities of AST, ALP, LDH, CK-MB, and plasma cTn-I significantly increased (P<0.05). RBCs, Hb, and HCT significantly increased in quercetin group, compared with hydrocortisone and control groups (P<0.05). Quercetin group significantly decreased LDH, CK-MB, and cTn-I compared with hydrocortisone and control groups (P<0.05). Quercetin significantly decreased AST in comparison to control group and ALP in comparison to hydrocortisone group, also (P<0.05).

These results suggest that quercetin protects RBCs in the early stages of sepsis and decreases organs dysfunction (heart and liver), therefore it has a positive influence on sepsis and may be more effective than routine corticosteroid (hydrocortisone) therapy.

Crocin, as a carotenoid compound of saffron, exerts a potent antioxidant property. Mesalazine is frequently used in the treatment of ulcerative colitis. This study investigated the effects of separated and combination treatments with crocin and mesalazine in a rat model of ulcerative colitis. Ulcerative colitis was induced by intra-colonic administration of acetic acid (4.00%, 1.00 mL) at 8 cm proximal of the anus. Normal saline, acetic acid, crocin (5.00, 10.00 and 20.00 mg kg-1), mesalazine (100 and 300 mg kg-1) and crocin (5.00 mg kg-1) plus mesalazine (100 mg kg-1) were administered after induction of colitis for eight days. Body weight, oraganosomatic index (OSI), macroscopic and microscopic evaluations of colon and measurement of malondialdehyde (MDA), superoxide dismutase (SOD), tumor necrosis factor-alpha (TNF-α) contents of colon tissue were determined on day eight after induction of colitis. Crocin (10.00 and 20.00 mg kg-1), mesalazine (300 mg kg-1) and crocin (5.00 mg kg-1) plus mesalazine (100 mg kg-1) significantly (p < 0.05) improved body weight and OSI and reduced macroscopic and microscopic scores. These treatments also significantly (p <0.05) recovered the increased levels of MDA and TNF-α as well as the decreased level of SOD in colon tissue. Crocin and mesalazine did not produce significant effects in intact rats. Based on the results, it is concluded that crocin and mesalazine produced protective effects on colon tissue via antioxidant and anti-inflammatory actions. In addition, a synergistic effect was observed between crocin and mesalazine in attenuating ulcerative colitis.