scholarly journals Acute effects of 2.856 GHz and 1.5 GHz microwaves on spatial memory abilities and CREB-related pathways

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shengzhi Tan ◽  
Hui Wang ◽  
Xinping Xu ◽  
Li Zhao ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Spatial Memory ◽  
Camp Response Element Binding ◽  
Cumulative Exposure ◽  
Control Group ◽  
Exposure Group ◽  
Acute Effects ◽  
Microwave Exposure ◽  
Calcium Calmodulin Dependent ◽  
Extracellular Signal ◽  
Male Wistar Rats

AbstractThis study aimed to evaluate the acute effects of 2.856 GHz and 1.5 GHz microwaves on spatial memory and cAMP response element binding (CREB)-related pathways. A total of 120 male Wistar rats were divided into four groups: a control group (C); 2.856 GHz microwave exposure group (S group); 1.5 GHz microwave exposure group (L group); and 2.856 and 1.5 GHz cumulative exposure group (SL group). Decreases in spatial memory abilities, changes in EEG, structural injuries, and the downregulation of phosphorylated-Ak strain transforming (p-AKT), phosphorylated-calcium/calmodulin-dependent protein kinase II (p-CaMKII), phosphorylated extracellular signal regulated kinase (p-ERK) and p-CREB was observed 6 h after microwave exposure. Significant differences in the expression of p-CaMKII were found between the S and L groups. The power amplitudes of the EEG waves (θ, δ), levels of structural injuries and the expression of p-AKT, p-CaMK II, p-CREB, and p-ERK1/2 were significantly different in the S and L groups compared to the SL group. Interaction effects between the 2.856 and 1.5 GHz microwaves were found in the EEG and p-CREB changes. Our findings indicated that 2.856 GHz and 1.5 GHz microwave exposure induced a decline in spatial memory, which might be related to p-AKT, p-CaMK II, p-CREB and p-ERK1/2.

scholarly journals EFFECT OF AFLATOXIN M1, "A HYDROXYLATED METABOLITE OF B1" ON SPERM CELL QUALITY OF ADULT MALE WISTAR RATS.

2019 ◽  
pp. 7-12
Author(s):  
Ibeh Isaiah Nnanna ◽  
Taidi Ekrakene ◽  
Okungbowa MO ◽  
Otabor Florence ◽  
Omorodion Nosa Terry
Keyword(s):  
Adult Male ◽  
Sperm Cell ◽  
Test Group ◽  
Aflatoxin M1 ◽  
Control Group ◽  
Exposure Group ◽  
Predetermined Level ◽  
Male Wistar Rats ◽  
The Third World ◽  
Hydroxylated Metabolite

The effect of aflatoxin on reproductive health takes a systematic approach as it indicates that a significant number of people living in the third world regions are exposed to these toxins due to the poor storage of grains. To expose the effects of aflatoxin M1 a hydroxylated metabolite of aflatoxin M1 Twenty four Adult male Wister rats were acclimatized and broken down into four groups, Test Group one (Two weeks exposure), Group Two ( four weeks exposure), Group Three ( Six weeks exposure) and Group Four ( Control Group). The Test Group 1, 2 and 3 were orally administered 7.2g/kg (LD50) of Aflatoxin M1 for the desired weeks of exposure and the sperm cell quality was assessed to determine the effect of Aflatoxin M1 on sperm cell quality in Adult male wister rat. The predetermined level of sperm cell quality is its ability to be motile as the motility of the sperm cell determines its viability. Group three had the highest presence of sluggishly immotile cells with very low progressive motility, followed by group, two and one, 37.5+ 9.97, 55.00+9.91, and 71.67+3.07 as against the control groups 85.8+2.17 with the highest significance at the group three which showed an extended exposure of aflatoxin m1 (p=0.05). This study links infertility and aflatoxin consumption, as the higher the doses the more spermatotoxicity is built which invariably could lead to sterility and azoospermia.

scholarly journals Activated ROCK/Akt/eNOS and ET-1/ERK pathways in 5-fluorouracil-induced cardiotoxicity: modulation by simvastatin

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Radwa Nasser Muhammad ◽  
Nada Sallam ◽  
Hanan Salah El-Abhar
Keyword(s):  
Cell Function ◽  
Coronary Artery Spasm ◽  
Rho Kinase ◽  
Control Group ◽  
Endothelial Cell Function ◽  
Extracellular Signal ◽  
Phosphorylated Akt ◽  
Male Wistar Rats ◽  
Cox 2 ◽  
Group 5

Abstract 5-Fluorouracil (5-FU) is used in the treatment of different solid tumors; however, its use is associated with rare, but serious cardiotoxicity. Nevertheless, the involvement of ROCK/NF-κB, Akt/eNOS and ET-1/ERK1/2 trajectories in the cardiotoxic effect and in the potential cardioprotective upshot of simvastatin has been elusive. Male Wistar rats were allocated into 5-FU (50 mg/kg/week; i.p, 6 weeks), simvastatin (15 mg/kg/day; p.o, 8 weeks) treated groups and simvastatin + 5-FU, besides the normal control group. 5-FU-induced cardiotoxicity boosted the serum level of N-terminal pro-brain (B-type) natriuretic peptide (NT-proBNP), aortic contents of endothelin (ET)-1 and thromboxane (TX) A2, as well as cardiac contents of NADPH oxidases (Nox), cyclooxygenase (COX)-2, malondialdehyde (MDA), phosphorylated Akt (p-Akt), phosphorylated extracellular signal-regulated kinase (p-ERK)1/2 and the protein expressions of rho-kinase (ROCK) and caspase-3. On the other hand, it suppressed cardiac reduced glutathione (GSH) and phosphorylated endothelial nitric oxide synthase (p-eNOS). Contrariwise, co-administration with simvastatin overcame these disturbed events and modulated the ROCK/NF-κB, Akt/eNOS and ET-1/ERK1/2 signaling pathways. This study highlights other mechanisms than coronary artery spasm in the 5-FU cardiotoxicity and reveals that NT-proBNP is a potential early marker in this case. Moreover, the cross-talk between ROCK/ NF-κB, ROS/COX-2/TXA2, Akt/eNOS and ET-1/ERK1/2 pathways contributes via different means to upsetting the vasoconstriction/vasodilatation equilibrium as well as endothelial cell function and finally leads to cardiomyocyte stress and death—the modulation of these trajectories offers simvastatin its potential cardio-protection against 5-FU.

scholarly journals Respiratory Health in a Community Living in Close Proximity to Gold Mine Waste Dumps, Johannesburg, South Africa

2020 ◽  
Vol 17 (7) ◽  
pp. 2240
Author(s):  
Samantha Iyaloo ◽  
Tahira Kootbodien ◽  
Nisha Naicker ◽  
Spo Kgalamono ◽  
Kerry S. Wilson ◽  
...  
Keyword(s):  
Respiratory Symptoms ◽  
Respiratory Health ◽  
Cumulative Exposure ◽  
Control Group ◽  
Gold Mine ◽  
X Rays ◽  
Exposure Group ◽  
Mine Dumps ◽  
Low Exposure ◽  
Mine Dump

The effects on respiratory health in populations living close to silica-rich gold mine dumps are unknown. This pilot study related respiratory health and exposure to mine dump dust using two measures of exposure: exposure group, based on distance lived from the mine dump—high (n = 93) (home <500 m from a mine dump), moderate (n = 133) (500–1.5 km), and low (n = 84) (>15 km, control group); and cumulative exposure index (CEI) derived from exposure group and number of years of residence in each exposure group. Participants were interviewed about respiratory symptoms and had chest X-rays and spirometry. We adjusted for key respiratory confounders. No subject had radiological features of silicosis. The high relative to low exposure group had significantly elevated adjusted odds ratios (aORs) for upper respiratory symptoms (aOR: 2.76, 95% CI: 1.28–5.97), chest wheezing (aOR: 3.78; 95% CI: 1.60–8.96), and spirometry-diagnosed chronic obstructive pulmonary disease (COPD) (aOR: 8.17; 95%CI: 1.01–65.85). These findings were similar for the high relative to medium exposure group, but no significant associations were found for the medium versus low exposure group. Chronic bronchitis and tuberculosis risks did not differ significantly among groups. CEI and exposure group produced similar results. In conclusion, residents residing <500 m from mine dumps had elevated adverse respiratory health effects.

The effect of tempeh intake on spatial memory in prediabetic rats

2019 ◽  
Vol 49 (4) ◽  
pp. 592-599 ◽  
Author(s):  
Annisa Ayuningtyas ◽  
Etisa Adi Murbawani ◽  
Nuryanto Nuryanto
Keyword(s):  
Body Weight ◽  
Spatial Memory ◽  
Travel Time ◽  
Wistar Rat ◽  
Control Group ◽  
Control Group Design ◽  
Content Type ◽  
Post Test ◽  
Male Wistar Rats ◽  
The Central Nervous System

Purpose Prediabetes can affect the central nervous system and lead to changes including impaired cognition and spatial memory. Isoflavones, especially genistein and daidzein, can increase spatial memory. Tempeh is a soy product with high levels of genistein and daidzein. The purpose of this paper is to determine the effect of tempeh on spatial memory of prediabetic Wistar rat. Design/methodology/approach A pre-and post-test randomised control group design was used. In total, 15 male Wistar rats were divided into three equal groups, Treatment 1 (T1), Treatment 2 (T2) and Treatment 3 (T3). All rats were injected with alloxan (120 mg/Kg body weight) to induce prediabetes. T1 was maintained on a diet of standard food for 14 days. T2 and T3 were given 9 g/200 g body weight and 18 g/200 g body weight of tempeh, respectively, for 14 days. The Morris water maze (MWM) test was used to test spatial memory. Findings While there were no statistically significant differences between the treatment groups, there was a difference with the tempeh-treated rats improving their spatial memory following tempeh ingestion with a decrease in the travel time to negotiate the MWM [T1(−8.36), T2 (−5.48) and T3 (3.66)]. Differences of travel time of the three groups was not significant (p = 0.677). Originality/value The result of the study indicates that tempeh may act as a functional food in reducing cognitive impairment associated with prediabetes and diabetes. However, as the result is not statistically significant, further research using animal models and human studies is warranted.

scholarly journals Aerobic exercise combined with environmental enrichment improves spatial memory and enhances neuroligin 1 expression: an animal study

2019 ◽  
Vol 28 (3) ◽  
pp. 228-33
Author(s):  
Faizah Abdullah Djawas ◽  
Sri Redjeki ◽  
Ria Kodariah ◽  
Neng Tine Kartinah
Keyword(s):  
Spatial Memory ◽  
Aerobic Exercise ◽  
Wistar Rats ◽  
Environmental Enrichment ◽  
Structural Changes ◽  
Escape Latency ◽  
Control Group ◽  
Hippocampal Region ◽  
Positive Effects ◽  
Male Wistar Rats

BACKGROUND Numerous studies have revealed that aerobic exercise (AE) or environmental enrichment (EE) exert positive effects on the molecular, cellular, and structural changes responsible for functional plasticity. Therefore, this study was aimed to investigate whether the combination of AE and EE yields a greater effect on spatial memory and increases the expression of the adhesion molecule neuroligin 1 compared with either of the therapies alone. METHODS Twenty 6-month-old male Wistar rats were randomly divided into four groups: (1) the control group (C), (2) the AE group, (3) the EE group, and (4) the AE-EE group. Escape latency in a Water-E-maze (WEM) task was used as a parameter to assess spatial memory function. Neuroligin 1 protein expression was examined via the immunohistochemistry (IHC) technique followed by IHC optical density (OD) score analysis of the CA1 hippocampal region. RESULTS Data acquired from the WEM task show that escape latency progressively decreased over time in all groups. However, animals in the AE-EE group required less time to complete the task compared with those in the control, AE, and EE groups. IHC OD scores revealed that the combination of AE and EE caused the highest expression of neuroligin 1 in the CA1 hippocampal region among the therapies studied. Statistical analysis indicated significant differences in OD score between the AE-EE and control, AE, and EE groups (p ≤ 0.001). CONCLUSIONS The combination of AE and EE rats increased neuroligin 1 expression and improved the spatial memory of male Wistar rats compared with application of either therapy alone.

scholarly journals Differences in Spatial Memory Impairment in Mice after Oral D-Galactose Administration and Intraperitoneal Injection

2020 ◽  
Vol 8 (A) ◽  
pp. 342-344
Author(s):  
Ketut Widyastuti ◽  
A. A A. Putri Laksmidewi ◽  
I Made Oka Adnyana ◽  
D. P. G. Purwa Samatra
Keyword(s):  
Spatial Memory ◽  
Intraperitoneal Injection ◽  
Memory Impairment ◽  
Oral Route ◽  
Control Group ◽  
Control Group Design ◽  
Injection Group ◽  
Significant Difference ◽  
Oral Group ◽  
Male Wistar Rats

BACKGROUND: The aging process can increase the incidence of dementia, such as spatial memory impairment to remember space, recognize shapes and distances. Research on dementia in mice was carried out by administering d-galactose through intraperitoneal injection, while oral d-galactose administration had not received enough attention. AIM: This study aims to prove the differences in the occurrence of spatial memory impairment in rats induced by d-galactose through two different routes, oral and intraperitoneal injection. METHODS: This study is an experimental study using a post- test control group design. The sample criteria were 20 male Wistar rats aged 12–14 weeks, weighing 200–300 g divided into two groups which are the oral and intraperitoneal injection. Spatial memory assessment based on spontaneous alternation using the Y-maze test was carried out at the end of week 8. RESULTS: In this study, the average spatial memory score after d-galactose administration in the injection group (51.572±4.388) was lower compared to the oral group (66.058±1.551). The Shapiro–Wilk normality test shows that the data are normally distributed with p > 0.05. Independent t-test showed a significant difference in the incidence of spatial memory disorders between the injection and oral groups with p = 0.010 (p < 0.05). CONCLUSION: The conclusion of this study is that d-galactose administration by oral route or intraperitoneal injection causes a decrease in spatial memory in mice. Spatial memory in the injection group was lower than in the oral group. This might be related to the decrease in synaptophysin in the hippocampus of mice due to d-galactose administration by intraperitoneal injection.

Chronic immobilization stress induces anxiety-related behaviors and affects brain essential minerals in male rats

2020 ◽  
pp. 1-8
Author(s):  
Zafer Sahin ◽  
Alpaslan Ozkurkculer ◽  
Omer Faruk Kalkan ◽  
Ahmet Ozkaya ◽  
Aynur Koc ◽  
...  
Keyword(s):  
Immobilization Stress ◽  
Central Area ◽  
Essential Elements ◽  
Male Rats ◽  
Control Group ◽  
Male Wistar Rats ◽  
Swimming Test ◽  
The Brain ◽  
Center Area ◽  
Chronic Immobilization Stress

Abstract. Alterations of essential elements in the brain are associated with the pathophysiology of many neuropsychiatric disorders. It is known that chronic/overwhelming stress may cause some anxiety and/or depression. We aimed to investigate the effects of two different chronic immobilization stress protocols on anxiety-related behaviors and brain minerals. Adult male Wistar rats were divided into 3 groups as follows ( n = 10/group): control, immobilization stress-1 (45 minutes daily for 7-day) and immobilization stress-2 (45 minutes twice a day for 7-day). Stress-related behaviors were evaluated by open field test and forced swimming test. In the immobilization stress-1 and immobilization stress-2 groups, percentage of time spent in the central area (6.38 ± 0.41% and 6.28 ± 1.03% respectively, p < 0.05) and rearing frequency (2.75 ± 0.41 and 3.85 ± 0.46, p < 0.01 and p < 0.05, respectively) were lower, latency to center area (49.11 ± 5.87 s and 44.92 ± 8.04 s, p < 0.01 and p < 0.01, respectively), were higher than the control group (8.65 ± 0.49%, 5.37 ± 0.44 and 15.3 ± 3.32 s, respectively). In the immobilization stress-1 group, zinc (12.65 ± 0.1 ppm, p < 0.001), magnesium (170.4 ± 1.7 ppm, p < 0.005) and phosphate (2.76 ± 0.1 ppm, p < 0.05) levels were lower than the control group (13.87 ± 0.16 ppm, 179.31 ± 1.87 ppm and 3.11 ± 0.06 ppm, respectively). In the immobilization stress-2 group, magnesium (171.56 ± 1.87 ppm, p < 0.05), phosphate (2.44 ± 0.07 ppm, p < 0.001) levels were lower, and manganese (373.68 ± 5.76 ppb, p < 0.001) and copper (2.79 ± 0.15 ppm, p < 0.05) levels were higher than the control group (179.31 ± 1.87 ppm, 3.11 ± 0.06 ppm, 327.25 ± 8.35 ppb and 2.45 ± 0.05 ppm, respectively). Our results indicated that 7-day chronic immobilization stress increased anxiety-related behaviors in both stress groups. Zinc, magnesium, phosphate, copper and manganese levels were affected in the brain.

Dietary Calcium Supplementation Suppresses Bone Formation in Magnesium-Deficient Rats

2006 ◽  
Vol 76 (3) ◽  
pp. 111-116 ◽  
Author(s):  
Hiroshi Matsuzaki ◽  
Misao Miwa
Keyword(s):  
Bone Formation ◽  
Calcium Supplementation ◽  
Control Diet ◽  
Formation Rate ◽  
Dietary Calcium ◽  
Mineral Apposition Rate ◽  
Control Group ◽  
Deficient Diet ◽  
Bone Formation Rate ◽  
Male Wistar Rats

The purpose of this study was to clarify the effects of dietary calcium (Ca) supplementation on bone metabolism of magnesium (Mg)-deficient rats. Male Wistar rats were randomized by weight into three groups, and fed a control diet (control group), a Mg-deficient diet (Mg- group) or a Mg-deficient diet having twice the control Ca concentrations (Mg-2Ca group) for 14 days. Trabecular bone volume was significantly lower in the Mg - and Mg-2Ca groups than in the control group. Trabecular number was also significantly lower in the Mg - and Mg-2Ca groups than in the control group. Mineralizing bone surface, mineral apposition rate (MAR), and surface referent bone formation rate (BFR/BS) were significantly lower in the Mg - and Mg-2Ca groups than in the control group. Furthermore, MAR and BFR/BS were significantly lower in the Mg-2Ca group than in the Mg - group. These results suggest that dietary Ca supplementation suppresses bone formation in Mg-deficient rats.

Pengaruh Profilaksis Ekstrak Ubi Jalar Ungu (Ipomoea batatas L.) terhadap Kadar Malondialdehida Hepar Tikus Putih (Rattus norvegicus) Jantan Galur Wistar yang Diinduksi Karagenan

2018 ◽  
Vol 15 (2) ◽  
pp. 146
Author(s):  
BRILIAN DINANTI ◽  
FITRI HANDAJANI
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Wistar Rats ◽  
Group Method ◽  
Control Group ◽  
Intraplantar Injection ◽  
Significant Difference ◽  
Male Wistar Rats ◽  
Potato Extract ◽  
Purple Sweet Potato

<p>Liver is an organ with complex metabolism. When the liver is inflamed, cellular immunity will defend against inflammatory agents by stimulating immune cells to produce reactive oxygen species (ROS). Excessive ROS accumulation cause oxydative stress with increased  liver malondialdehyde (MDA) level. Some researches showed that purple sweet potato contain flavonoids (anthocyanins) that functioned as antioxydants. This study aimed to show the prophylactic effect of purple sweet potato extract to the liver MDA level of male Wistar rats induced by carrageenan.</p><p>This study used post-only control group method using 18 male Wistar rats divided into 3 groups: group of rats without treatment, group of rats induced by 0,1 ml of 1% carrageenan by intraplantar injection on day-8, and group of rats given with 872 mg/kgBW of purple sweet potato extract for 7 days and induced by 0,1 ml of 1% carrageenan. In the end of the study, the liver MDA levels were measured by Thio-Barbituric Acid method on each groups.</p><p>The results of One-Way ANOVA test showed there was no significant difference (p = 0,290) between group of rats without treatment (<em>x̅</em>= 207,50) and group of rats induced by carrageenan (<em>x̅</em>=233,17). Then, there is no significant difference (p = 0.978) between group of rats induced by carrageenan and group of rats given with prophylactic purple sweet potato extract and induced by carrageenan (<em>x̅</em>= 232,50).</p><p>The conclusion of this study is giving intraplantar injection of carrageenan can increase liver MDA level insignificantly and giving prophylactic purple sweet potato extract has an effect to decrease the liver MDA level of rats induced by carragenan insignificantly because it contains anthocyanins as antioxidants.</p><p> </p><strong>Keywords: </strong>Liver, <em>Ipomoea batatas</em> L., Malondialdehyde, Anthocyanins

Mechanism Involved in Fortification by Berberine in CDDP-Induced Nephrotoxicity

2020 ◽  
Vol 13 (4) ◽  
pp. 342-352 ◽  
Author(s):  
Vipin K. Verma ◽  
Salma Malik ◽  
Ekta Mutneja ◽  
Anil K. Sahu ◽  
Kumari Rupashi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Renal Tissue ◽  
Isoquinoline Alkaloid ◽  
Experimental Models ◽  
Beclin 1 ◽  
Control Treatment ◽  
Control Group ◽  
Treatment Groups ◽  
Single Intraperitoneal Injection ◽  
Male Wistar Rats

Background: The activation of Nrf2/HO-1 pathway has been shown to protect against cisplatin- induced nephrotoxicity by reducing oxidative stress. Berberine (Ber), an isoquinoline alkaloid, has demonstrated antioxidant, anti-inflammatory and anti-apoptotic activities in various experimental models. Aim: To check the effect of Ber on cisplatin-induced nephrotoxicity and to explore the involved mechanism. Methods: Adult male Wistar rats were divided into 6 groups: Normal, cisplatin-control, treatment groups and per se group. Normal saline and Ber (20, 40 and 80 mg/kg; p.o.) was administered to rats for 10 days. A single intraperitoneal injection of cisplatin (8 mg/kg) was injected on 7th day to induced nephrotoxicity. On 10th day, rats were sacrificed, the kidney was removed and stored for the estimation of various parameters. Results: As compared to cisplatin-control group, Ber pretreatment improved renal function system and preserved renal architecture. It also diminished oxidative stress by upregulating the expression of Nrf2/HO-1 proteins. In addition, Ber attenuated the cisplatin mediated inflammation and apoptosis. Furthermore, it also reduced the phosphorylation of p38/JNK and PARP/Beclin-1 expression in the kidney. Conclusion: Ber attenuated renal injury by activating Nrf2/HO-1 and inhibiting JNK/p38MAPKs/ PARP/Beclin-1 expression which prevented oxidative stress, inflammation, apoptosis and autophagy in renal tissue.

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