The Effect of Selenium as a Feed Additive on Blood Parameters Antioxidant Activity in Dairy Goat: Meta-Analysis
Research Article
The Effect of Selenium as a Feed Additive on Blood Parameters Antioxidant Activity in Dairy Goat: Meta-Analysis
Dwi Putri Nurmala1, Tri Eko Susilorini1, Osfar Sjofjan2*, Danung Nur Adli2
1Department of Animal Production, Faculty of Animal Science, Universitas Brawijaya, Malang, East Java, Indonesia; 2Department of Animal Nutrition and Feed Science, Faculty of Animal Science, Universitas Brawijaya, Malang, East Java, Indonesia.
Abstract | This study aimed to provide more precise conclusions about the effect of selenium as a feed additive on the blood parameters and antioxidant activity in dairy goats using a meta-analysis method. A comprehensive literature search was conducted, selecting studies published from 2005 to 2023 that examined selenium supplementation in dairy goats. Using R software 4.3.3 (2024-02-29 ucrt), data from 16 studies were analyzed using meta-regression analyses. Selenium supplementation in dairy goats significantly enhanced GSH-Px activity (P<0.01), but had no significant effect on blood parameters (RBC, WBC, hemoglobin, hematocrit, cholesterol, glucose, and total selenium). Organic selenium, such as selenium yeast, selenium-enriched yeast, selenomethionine, selenium proteinate, and lactate protein complex, was found to be more effective than inorganic selenium after a post hoc analysis between selenium sources and parameters. In conclusion, supplementing with selenium, especially from organic sources, can improve some of the antioxidant status in dairy goats.
Keywords | Blood profiles, Dairy goat, Glutathione peroxidase, Meta-analysis, Selenium
Received | May 30, 2024; Accepted | June 22, 2024; Published | July 12, 2024
*Correspondence | Osfar Sjofjan, Department of Animal Nutrition and Feed Science, Faculty of Animal Science, Universitas Brawijaya, Malang, East Java, Indonesia; Email: [email protected]
Citation | Nurmala DP, Susilorini TE, Sjofjan O, Adli DN (2024). The effect of selenium as a feed additive on blood parameters antioxidant activity in dairy goat: Meta-analysis. Adv. Anim. Vet. Sci., 12(8):1588-1595.
DOI | https://dx.doi.org/10.17582/journal.aavs/2024/12.8.1588.1595
ISSN (Online) | 2307-8316
Copyright: 2024 by the authors. Licensee ResearchersLinks Ltd, England, UK.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
INTRODUCTION
Feed is very important to support livestock growth and productivity. Feed holds the largest financing, between 60-70% of the total livestock production costs (Suroso et al., 2023). Yadav et al. (2018) stated that livestock requires five categories of nutrients, namely carbohydrates, proteins, lipids, minerals, and vitamins. Ruminants can experience poor growth if fed feeds with low protein, low energy, and unbalanced minerals. Twenty-one minerals are considered essential for animals. These minerals are classified into macro and micro mineral.
Selenium (Se) is one of the important minerals (trace minerals) in livestock production because of its diverse physiological roles (Arshad et al., 2020). Some of the benefits of selenium in the animal body include playing a role in thyroid gland synthesis and thyroid hormone function, reducing oxidative stress, ant mutagenic, ant carcinogenic, antimicrobial and ant parasitic, increasing immune function and providing protection against oxidative brain lipid damage (Hosnedlova et al., 2017).
Selenium is a mineral that is only a small part of feed, but is very important for livestock. The optimal amount of selenium in feed must be considered to maintain normal animal physiology, however, excess or deficiency can cause toxicity and deficiency. Schone et al. (2013) reported that Se toxicity is not considered a life threat to animals or humans. Selenium deficiency can affect reproductive efficiencies such as placental retention, abortion, premature embryo death and infertility, besides it can interfere with growth performance (white muscle disease) and skeletal muscle necrosis (Mehdi and Dufrasne, 2016). Blood profiles have been extensively utilized to assess animal stress and welfare levels, as well as to track nutritional status, metabolism, and health status (Astuti et al., 2021). Blood parameters in ruminants are correlated with the season, the herd management techniques, and the physiological state (Mekroud et al., 2021). However, the studies reported regarding the blood profiles are critical because they provide information regarding the animal’s health status (Gao et al., 2022).
Meta-analysis is a systematic review of a specific topic in the literature that provides quantitative estimates of the impact of a treatment (Russo, 2007). Meta-analysis is the analysis of statistical studies by analyzing data from primary studies. The results of the primary study analysis are used as a basis for correction factors, accepting and supporting existing research (Adli et al., 2024). Meta-analysis overcomes the limitations of small sample sizes of individual studies, detecting effects of interest and reducing the risk of false-negative results. Combining data from separate studies can statistically provide more precise estimates than single studies (Lee, 2019). Therefore, this research aims to provide more precise conclusions about the effect of selenium as a feed additive on blood parameters and antioxidant activity in dairy goats through meta-analysis methods.
MATERIALS AND METHODS
Eligibility criteria, search strategy, and data extraction
A dataset comprising literature on the use of selenium as a feed additive in dairy goats was compiled, covering publications from 2005 to 2023. Literature searches were conducted on Scopus (https://www.sciencedirect.com/), PubMed (https://pubmed.ncbi.nlm.nih.gov/), and Google Scholar (https://scholar.google.com/). The keywords used included selenium, dairy goat, feed additive, red blood cell, white blood cell, haemoglobin, haematocrit, cholesterol, glucose, total protein, GSH-Px, selenium concentration, and blood.
The criteria for including articles in the database were: (1) the article was published between 2005 and 2023, (2) the treatment included the dose of selenium used, (3) the article reported on the use of selenium in dairy goats, excluding other animals, (4) the dairy goats were adult females, and (5) selenium was administered by mixing it into feed. Data from articles meeting these criteria were tabulated in Excel, including details such as author, year of publication, type of goat used, lactation phase of the goat, type of selenium used, amount of selenium used, and the values of each parameter. All data were converted into consistent units of measurement to facilitate direct analysis within specific parameters. The final database included 16 articles with a total of 129 data units. Figure 1 details the selection process of the studies used in this meta-analysis, while Table 1 provides a summary of the completed dataset, adhering to PRISMA-P guidelines (Adli et al., 2024).
Table 1: Studies selected to be included in the meta-analysis.
No |
Reference |
Source of selenium |
Period |
Level (mg/day) |
Strain dairy goat |
1 |
Zhang et al. (2017) |
Se-enriched yeast and sodium selenite |
L |
0-1,12 |
Guanzhong |
2 |
Rashnoo et al. (2020) |
N/A |
D |
0-0,25 |
N/A |
3 |
Petrera et al. (2009) |
Sodium selenite and se yeast |
L |
0-0,26 |
Saanen |
4 |
Kachuee et al. (2019) |
Sodium selenite and selenomethionine |
L |
0-0,6 |
Khalkhali |
5 |
Silveira et al. (2019) |
Se yeast |
L |
0-0,4 |
Saanen |
6 |
Shi et al. (2018) |
Se enriched yeast |
D |
0-4,63 |
Taihang black |
7 |
Barcelos et al. (2022) |
Se yeast |
L |
0-11,2 |
Saanen X Pardo Alpine |
8 |
Vasconcelos et al. (2023) |
Se yeast |
L |
0-40 |
Saanen X Toggenburg |
9 |
Ziaei et al. (2015) |
- |
D |
0-0,86 |
Rainei |
10 |
Shareef et al. (2019) |
Se yeast |
L |
0,0,03 |
Local Iraqi does |
11 |
Tozzi et al. (2016) |
Sodium selenite and se yeast |
L |
0-0,2 |
Alpine chamois |
12 |
Misurova et al. (2009) |
Sodium selenite and lactate protein complex |
D |
0-0,28 |
White shorthair |
13 |
Antuvonic et al. (2013) |
Se yeast |
L |
0-0,03 |
Alpine |
14 |
Pavlata et al. (2011) |
Sodium selenite and lactate protein complex |
D |
0-0,3 |
White shorthair |
15 |
Pavlata et al. (2012) |
Sodium selenite, se-enriched yeast, selenium proteinate and lactate protein complex |
D |
0-0,24 |
Shite shorthair |
16 |
Tsiplakou et al. (2021) |
Se yeast |
L |
0-0,12 |
Alpine X local breed |
Note: L= Lactation; D= Days open; N/A= Not available.
Coding and statistical analysis
The meta-analysis equation follows the following formula (St-Pierre, 2001; Sauvant et al., 2008).
Yijk represents the dependent variable, μ stands for the overall mean value (intercept value), Si denotes the random effect of the ith study, assumed to be ~ Niid (0, σS2), τj represents the fixed effect of the jth of τ factor, and Sτij represents the random interaction effect between the ith and jth dosage of the τ factor, also assumed to follow a normal distribution with mean 0 and variance σSr2. β1 represents the overall value of the linear regression coefficient for Y in relation to X, serving as a fixed effect or slope, β2 denotes the general coefficient of the quadratic regression for Y concerning X, functioning as a fixed effect or slope, Xij dan X2ij represent the continuous values of the predictor variable in both linear and quadratic forms, respectively. The bi stands for the random effect specific to each study on the regression coefficient of Y with respect to X, assumed to be ~ Niid (0, σS2). Finally, eijk represents the residual value arising from unpredictable error. In case, the quadratic form presented insignificant different, the models changes into linear form.
The validation test was carried out utilizing the root mean square error (RMSE) and coefficient of determination (R2) as metrics. The following equation represents RMSE and R2.
In this scenario, where O represents the actual value, P stand for the estimated value, NDP denotes the number of data point, σ2f represents the variant of a fixed factor, ∑(σ2l ) is the sum of component variances, σ2e signifies the variance attributed to predictor dispersion, and σ2d characterizes the specific distribution of the variance. All meta-regression analyses were carried out using R software 4.3.3 (2024-02-29 ucrt).
Table 2: Descriptive statistics of the effect selenium as feed additive on the blood profile of dairy goat.
No |
Response |
Unit |
N |
Mean |
SD |
Min |
Max |
1 |
RBC |
x 1012/L |
12 |
11,02 |
1,07 |
9 |
12,46 |
2 |
WBC |
x 109/L |
12 |
13,34 |
3,59 |
9,24 |
21,73 |
3 |
Hemoglobin |
g/dL |
12 |
7,96 |
0,84 |
6,82 |
9,79 |
4 |
Hematocrit |
% |
15 |
33,20 |
18,58 |
20,25 |
72 |
5 |
Cholesterol |
mg/dL |
8 |
12,85 |
18,65 |
29,19 |
77,02 |
6 |
Glucose |
mg/dL |
9 |
57,59 |
4,51 |
48,29 |
61 |
7 |
Total protein |
g/L |
11 |
59,23 |
23,49 |
20,4 |
80,3 |
8 |
Selenium |
µg/L |
32 |
185,73 |
111,94 |
36,18 |
463,33 |
9 |
GSH-Px |
µkat/L |
18 |
329,44 |
385,89 |
45,5 |
1154,6 |
Note: RBC= Red Blood Cell; WBC= White Blood Cell.
RESULT AND DISCUSSION
The results of the meta-analysis on the relationship between selenium sources and blood profiles are presented in Table 2. The meta-analysis indicates that different selenium sources have significantly varied effects on white blood cells (WBC), glucose, and glutathione peroxidase (GSH-Px) activity in the blood (P<0.05), with selenium concentration showing a highly significant effect (P<0.01). Conversely, there was no significant effect on red blood cells (RBC), haemoglobin, haematocrit, cholesterol, or total protein (P>0.05). In dairy goats, the white blood cell (WBC) count ranges from 9.24 x 109/L to 21.73 x 109/L. Their glucose levels vary between 48.29 and 61 mg/dL, and the activity of glutathione peroxidase (GSH-Px) ranges from 45.5 to 1154.6 µkat/L. Post hoc analysis indicated that Se-enriched yeast was the most effective selenium source for improving WBC and glucose levels. Both Se-enriched yeast and selenomethionine were effective in increasing total se, whereas sodium selenite and lactate protein complex were most effective for enhancing GSH-Px activity. The study found that organic sources of selenium, such as Se-enriched yeast (782.2 µkat/L), Selenium proteinate (904.2 µkat/L), and lactate protein complex (926.47 µkat/L), were the most effective. The data supporting these findings is presented in Table 3.
According to Sevcikova et al. (2006), organic selenium is utilised more efficiently than inorganic selenium sources. Organic selenium is actively absorbed via amino acid
Table 3: Regression linear model of effect source of selenium on blood profile of dairy goat.
No |
Response |
Unit |
Average |
F value |
Pr > F |
||||||
Control |
Sodium selenite |
Se yeast |
Se-enriched yeast |
Seleme thionine |
Sele-nium protei-nate |
Lactate protein complex |
|||||
1 |
RBC |
x 1012/L |
10.69 |
N/A |
11.38 |
11.93 |
N/A |
N/A |
N/A |
5.48 |
0.05 |
2 |
WBC* |
x 109/L |
12.94a |
N/A |
11.64a |
18.59b |
N/A |
N/A |
N/A |
7.97 |
0.01 |
3 |
Hemoglobin |
g/dL |
7.72 |
N/A |
8.31 |
8.12 |
N/A |
N/A |
N/A |
1.74 |
0.25 |
4 |
Hematocrit |
% |
32.16 |
N/A |
24.98 |
34.63 |
N/A |
N/A |
N/A |
4.33 |
0.08 |
5 |
Cholesterol |
g/dL |
48.83 |
N/A |
59.74 |
34.84 |
N/A |
N/A |
N/A |
1.29 |
0.39 |
6 |
Glucose* |
mg/dL |
54.81a |
N/A |
49.75a |
58.79b |
N/A |
N/A |
N/A |
26.54 |
0.03 |
7 |
Total protein |
g/L |
58.37 |
N/A |
71.70 |
70.75 |
N/A |
N/A |
N/A |
1.01 |
0.46 |
8 |
Selenium** |
µg/L |
128.36a |
238.6ab |
168.09ab |
340.97b |
435.86b |
167.2ab |
154.2ab |
5.98 |
0.001 |
9 |
GSH-Px* |
µkat/L |
325.77a |
972.72b |
170.29ab |
782.2ab |
N/A |
904.2ab |
926.47b |
6.23 |
0.025 |
RBC= Red Blood Cell; WBC= White Blood Cell; N/A= Not available. *= significant different (P<0,05); **=significantly (P<0,01).
transport mechanisms, whereas inorganic selenium is absorbed passively through simple diffusion (Korzeniowska et al., 2018). Khalili et al. (2019) reported that organic selenium in the form of selenium yeast is more effective than inorganic selenium in the form of sodium selenite at increasing mean corpuscular hemoglobin (MCH), reproductive parameters, and health parameters. Additionally, Huang et al. (2023) found that organic selenium supplements, such as selenomethionine and selenium yeast, are more effective at enhancing the immune and antioxidant capacities of Chinese Xiangzhong Black beef cattle.
The bioavailability and toxicity of selenium are linked to its chemical form, with organic selenium being reported as more bioavailable and less toxic than inorganic selenium (Jin et al., 2018). Organic selenium compounds, such as selenomethionine and selenocysteine, are actively absorbed through amino acid transport mechanisms. On the other hand, inorganic selenium, like selenate and selenite, is passively absorbed through simple diffusion processes (Pavlata et al., 2011). The bioavailability of selenium in dairy goats is essential for their health and productivity. Studies have shown that organic selenium sources have higher oral bioavailability due to greater rumen microorganism incorporation and reduced formation of elemental selenium by rumen microorganisms (McDermott et al., 2024). Additionally, organic selenium supplementation has been linked to improved milk production in dairy goats (Dara et al., 2018). Conversely, inorganic selenium is quickly transformed into metabolically available selenide in the organism, which is then converted into functional selenoproteins containing selenocysteine (Mehdi and Dufrasne, 2016). The rapid metabolism of inorganic selenium and its difficulty in absorption contribute to its potential toxicity, emphasizing the importance of considering the chemical form of selenium to mitigate adverse effects (Zhang et al., 2023).
The key differences in study design, animal species, and dosage of supplementation between the two studies likely account for these contrasting results. The theoretical implications of our findings suggest that selenium plays a more critical role in glucose metabolism in dairy goats than previously understood. This aligns with theories proposing selenium’s involvement in antioxidant defense and metabolic regulation. Our study’s significant findings support the hypothesis that adequate selenium levels can enhance metabolic health and glucose homeostasis in dairy goats.
Long-term, these findings suggest that selenium supplementation could be a valuable strategy in managing metabolic health in dairy goats, potentially improving productivity and overall health. Future research should further explore the optimal selenium dosage and its effects on various metabolic parameters, considering different breeds and environmental conditions to generalize these findings.
The meta-analysis results regarding selenium levels and blood profiles are shown in Table 4. The illustration regression line between the level of selenium and blood profile is shown in Figures 2, 3, and 4. Different selenium levels had a highly significant effect on GSH-Px (µkat/L) in the blood (P<0.01), with the regression function y=329.44+1223.944x, Figure 5. Meanwhile, RBC, WBC, hemoglobin, hematocrit, cholesterol, glucose, total protein, and selenium concentration showed no significant effect (P>0.05). Each regression function, where RBC (x 1012/L): y= 11.02 + 0.022x, WBC (x 109/L): y= 13.34 - 0.002x, hemoglobin (g/dL): y= 7.96 + 0.007x, hematrocit (%): y= 33.2 + 7.745x, cholesterol (mg/dL): y=49.47 + 12.854x; glucose (mg/dL): y= 57.59 +1.759x, total protein (g/L): y= 59.23 + 12.855x and selenium (µg/L): y= 185.73 + 0.104x.
Even though the research results are like that, feeding dairy cows a supra-nutritional selenium-yeast supplement during late gestation resulted in improved antioxidant status
Table 4: Regression linear model of effect level selenium on blood profile of dairy goat.
No |
Response |
Unit |
Model |
N |
Inter-cept |
SE inter-cept |
Slope |
SE slope |
P value |
RMSE |
AIC |
1 |
RBC |
x 1012/L |
L |
12 |
11.02 |
0.53 |
0.022 |
0.02 |
0.28 |
0.85 |
43.33 |
2 |
WBC |
x 109/L |
L |
12 |
13.34 |
1.46 |
-0.002 |
0.08 |
0.98 |
0.99 |
69.72 |
3 |
Hemoglobin |
g/dL |
L |
12 |
7.96 |
0.39 |
0.007 |
0.02 |
0.68 |
0.91 |
41.33 |
4 |
Hematocrit |
% |
L |
15 |
33.20 |
7.74 |
7.745 |
0.06 |
0.48 |
0.95 |
96.43 |
5 |
Cholesterol |
g/dL |
L |
8 |
49.47 |
12.85 |
12.854 |
0.11 |
0.31 |
0.78 |
57.16 |
6 |
Glucose |
mg/dL |
L |
9 |
57.59 |
1.75 |
-0,479 |
0.43 |
0.31 |
1.07 |
55.62 |
7 |
Total protein |
g/L |
L |
11 |
59.23 |
12.85 |
-0,043 |
0.06 |
0.48 |
0.87 |
71.19 |
8 |
Selenium |
µg/L |
L |
32 |
185.73 |
30,03 |
0.104 |
2.49 |
0.97 |
1.52 |
379.32 |
9 |
GSH-Px** |
µkat/L |
L |
18 |
329.44 |
133,83 |
1223.944 |
230,98 |
<0.001 |
0.86 |
219.59 |
Note: RBC= Red Blood Cell; WBC= White Blood Cell; N= amount of data; SE= standart error; RMSE= root mean squares error. AIC= akaike information criteria. **= significantly (P<0.01).
postpartum, indicating a potentially positive impact on red blood cell, hemoglobin, and hematocrit (Żarczyńska et al., 2018). In addition, increasing RBC count, hemoglobin, and hematocrit by selenium supplementation was also reported in lactating donkeys (Tong et al., 2024).
The lack of a significant impact of selenium as a feed additive on glucose levels in dairy goats aligns with the findings of Żarczyńska et al. (2021), their study indicated that selenium supplementation, particularly in organic forms like selenite-triglycerides, did not significantly affect glucose levels in dairy cows. Despite the analytical results of this study, theoretically, there is a hypothesized influence of selenium on glucose metabolism; studies in rats and humans revealed that selenium might stimulate glucose intake and regulation of metabolic processes such as glycolysis, gluconeogenesis, fatty acid synthesis, or pentose phosphate pathway (Fontenelle et al., 2018). Total protein levels are a good indicator to describe the osmotic state, and nutrient transportation through extracellular fluid (blood plasma). In addition, total protein is also a good indication of the physiologic and biochemical function of liver tissue. Good liver function can fulfil the availability of nutrient precursors, both amino acids, glucose, and fatty acids for the biosynthesis of milk in the mammary gland (Januardani et al., 2023). However, in the research of Reczyńska et al. (2019) reported that selenium can increase the concentration of total blood protein in goats, but the effect was observed during a longer study, namely after 160 days of oral selenium supplementation.
There was an increase in the amount of Glutathione Peroxidase in the blood of dairy goats supplemented with selenium, the same as in cows in the study by Salman et al. (2013) has shown that dietary supplementation with selenium enhances the activity of GSH-Px in the blood. Arshad et al. (2020) the significant effects of selenium (Se) in dairy animals are largely due to the various functions performed by selenoproteins. The cellular redox system and the body’s antioxidant defense depend on selenoenzymes (such as Glutathione Peroxidase) and selenoprotein. Therefore, an adequate dietary intake of Se is essential to provide sufficient Se-Cys and Se-Met for selenoprotein synthesis. Supplementing dairy animals’ diets with Se is considered a potential strategy to enhance immune response and reduce metabolic and oxidative stress. Enzyme Glutathione peroxidase contains selenium as an integral structural component and plays an important role in animal physiology and health (Qazi et al., 2019).
CONCLUSIONS AND RECOMMENDATIONS
Results from the meta-analysis showed that feeding dairy goats with selenium as a feed additive significantly increase the activity of glutathione peroxidase (GSH-Px) in their blood. The regression function y = 329.44 + 1223.944x indicates that giving 1 mg of selenium per goat per day will raise the glutathione peroxidase activity in the blood by 1223.944 µkat/L. GSH-Px is a selenoenzyme that plays a role in protecting cells from oxidative damage by catalyzing the breakdown of hydrogen peroxide and lipid peroxide, thus acting as a major antioxidant defense mechanism. An increase in glutathione peroxidase activity in the blood means improved antioxidant status in dairy goats.
ACKNOWLEDGeMENTS
The authors thanks to Universitas Brawijaya and LPDP (Lembaga Pengelola Dana Pendidikan) for funding this research.
NOVELTY STATEMENT
The novelty of this research is by using meta-analysis to evaluate the impact of selenium as a feed additive on the blood profile of dairy goats.
AUTHOR’S CONTRIBUTION
Dwi Putri Nurmala contributed to data collection, data analysis and manuscript preparation. Tri Eko Susilorini, Osfar Sjofjan and Danung Nur Adli contributed to the research design, supervision and revision of the manuscript. All authors read and approved the final version of the manuscript in the journal at this time.
Conflict of interest
The authors have declared no conflict of interest.
REFERENCES
Adli DN, Sholikin MM, Ujilestari T, Ahmed B, Sadiqqua A, Harahap MA, Sofyan A and Sugiharto S (2024). Effect of fermentation of herbal products on growth performance, breast meat quality, and intestinal morphology of broiler chickens: A meta-analysis. Ital. J. Anim. Sci., 23(1): 734-750. https://doi.org/10.1080/1828051X.2024.2351441
Antunović Z, Klapec T, Ćavar S, Šperanda M, Pavić V, Novoselec J and Klir Ž (2013). Status of selenium and correlation with blood GSH-Px in goats and their kids in organic breeding fed with different levels of organic selenium. Arch. Anim. Breed., 56(1): 169–177. https://doi.org/10.7482/0003-9438-56-016
Arshad MA, Ebeid HM, Hassan F (2020). Revisiting the effects of different dietary sources of selenium on the health and performance of dairy animals: A review. Biol. Trace Element. Res., 199: 3319–3337. https://doi.org/10.1007/s12011-020-02480-6
Astuti A, Rochijan, Widyobroto BP, Noviandi CT (2021). Nutrient status hematological and blood metabolite profile of mid-lactating dairy cows during wet and dry seasons raised under Indonesian tropical environmental conditions. J. Anim. Behave. Biometeorol., 10: 2207. https://doi.org/10.31893/jabb.22007
Barcelos B, Gomes V, Vidal AMC, Junior JEF, Araujo MLGML, Alba HDR, Netto AS (2022). Effect of selenium and vitamin E supplementation on the metabolic status of dairy goats and respective goat kids in the peripartum period. Trop. Anim. Health Prod., 54: 36. https://doi.org/10.1007/s11250-021-03034-1
Dara F, Buchari, Noviandri I (2018). Preparation of copper amalgam (CuHg) as working electrode for analysis of selenium. IOP Conf. Ser. Earth Environ. Sci., 160(1): 012024. https://doi.org/10.1088/1755-1315/160/1/012024
Fontenelle LR, Feitosa MM, Morais JBS, Severo JS, Freitas TEC, Beserra JB, Henriques GS, Marreiro DN (2018). The role of selenium in insulin resistance. Braz. J. Pharm. Sci., 54(1): e00139. https://doi.org/10.1590/s2175-97902018000100139
Gao J, Yang D, Sun Z, Niu J, Bao Y, Liu S, Tan, Z, Hao L, Cheng Y, Liu S (2022). Changes in blood metabolic profiles reveal the dietary deficiencies of specific nutrients and physiological status of grazing yaks during the cold season in Qinghai province of China. Metabolites, 12: 738. https://doi.org/10.3390/metabo12080738
Hosnedlova B, Kepinska M, Skalickova S, Fernandez C, Ruttkay-Nedecky B, Peng Q, Baron M, Melcova M, Opatrilova R, Zidkova J, Bjorklund G, Sochor J, Kizek R (2018). Nano-selenium and its nanomedicine applications: A critical review. Int. J. Nanomed., 13: 2107–2128. https://doi.org/10.2147/IJN.S157541
Huang Q, Wang S, Yang X, Han X, Liu Y, Khan NA and Tan Z (2023). Effects of organic and inorganic selenium on selenium bioavailability, growth performance, antioxidant status and meat quality of a local beef cattle in China. Front. Vet. Sci., 10. https://doi.org/10.3389/fvets.2023.1171751
Januardani AA, Tanuwira UH, Mushawwir A (2023). Profil Hematologi dan Protein Plasma darah Sapi Perah Laktasi di Kelompok ternak Bojong Kawung Pasir Jambu dengan Pemberian Feed Supplement. J. Ilmu dan Industri Petern., 9(2): 103-115. https://doi.org/10.24252/jiip.v9i2.39383
Jin W, Yoon C, Johnston TV, Ku S, Ji GE (2018). Production of Selenomethionine-Enriched Bifidobacterium bifidum BGN4 via Sodium Selenite. Biocatalysis, 23(11): 2860. https://doi.org/10.3390/molecules23112860
Kachuee R, Benmar HA, Mansouri Y, Davati JS (2019). The effect of nano-selenium, seleno-methionine and sodium selenite on milk production, selenium and IgG levels of Khalkhali goats and their kids. J. Anim. Sci. Res., 29(2): 57-71.
Khalili M, Chamani M, Amanlou H, Nikkhah A, Sadeghi A, Dehkordi FK, Rafiei M, Shirani V (2019). The effect of feeding inorganic and organic selenium sources on the hematological blood parameters, reproduction and health of dairy cows in the transition period. Acta Sci. Anim. Sci., 42: e45371. https://doi.org/10.4025/actascianimsci.v42i1.45371
Korzeniowska M, Króliczewska B, Kopeć W (2018). Effect of dietary selenium on protein and lipid oxidation and the antioxidative potential of selected chicken culinary parts during frozen storage. J. Chem., pp. 1–12. https://doi.org/10.1155/2018/3492456
Lee YH (2019). Strengths and limitations of meta-analysis. Korean J. Med., 94(5): 391-395. https://doi.org/10.3904/kjm.2019.94.5.391
Martiniano SE, Fernandes LA, Alba EM, Philippini RR, Tabuchi SCT, Kieliszek M, Santos JCS, Silva SS (2020). A new approach for the production of selenium-enriched and probiotic yeast biomass from agro-industrial by-products in a Stirred-Tank Bioreactor. Metabolites, 10: 508. https://doi.org/10.3390/metabo10120508
McDermott F, Kennedy E, Drouin G, Brennan L, O’Callaghan TF, Egan M, Hogan SA (2024). Triglyceride and fatty acid composition of bovine colostrum and transition milk in pasture-based dairy cows supplemented prepartum with inorganic selenium, organic selenium or rumen-protected choline. Int. J. Dairy Technol., 77(2): 559–574. https://doi.org/10.1111/1471-0307.13051
Mehdi Y, Dufrasne I (2016). Selenium in cattle: A review. Molecules, 21(4): 545. https://doi.org/10.3390/molecules21040545
Mekroud M, Arzour-Lakehal N, Ouchene-Khelifi NA, Ouchene N, Titi A, Mekroud A (2021). Seasonal variations in hematological profile of Holstein dairy cows as an indicator for physiological status assessment. Agric. Sci. Technol., 13(1): 28-33. https://doi.org/10.15547/ast.2021.01.005
Misurova L, Pavlata L, Pechova A, Dvorak R (2009). Effect of a long-term peroral supplementation with sodium selenite and selenium lactate-protein complex on selenium status in goats and their kids. Vet. Med., 54(7): 324–332. https://doi.org/10.17221/107/2009-VETMED
Pavlata L, Misurova L, Pechova A, Dvorak R (2011). The effect of inorganic and organically bound forms of selenium on glutathione peroxidase activity in the blood of goats. Vet. Med., 56(2): 75–81. https://doi.org/10.17221/1576-VETMED
Pavlata L, Mišurová L, Pechová A, Dvořák R (2012). Comparison of organic and inorganic forms of selenium in the mother and kid relationship in goats. Czech J. Anim. Sci., 57(8): 361–369. https://doi.org/10.17221/6271-CJAS
Petrera F, Calamari L, Bertin G (2009). Effect of either sodium selenite or Se–yeast supplementation on selenium status and milk characteristics in dairy goats. Small Rumin. Res., 82(2–3): 130–138. https://doi.org/10.1016/j.smallrumres.2009.02.008
Qazi IH, Angel C, Yang H, Zoidis E, Pan B, Wu Z, Ming Z, Zeng CJ, Meng Q, Han H (2019). Role of selenium and selenoproteins in male reproductive function: a review of past and present evidences. Antioxidants, 8(8): 268. https://doi.org/10.3390/antiox8080268
Rashnoo M, Rahmati Z, Azarfar A, Fadayifar A (2020). The effects of maternal supplementation of selenium and iodine via slow-release blouses in late pregnancy on milk production of goats and performance of their kids. Ital. J. Anim. Sci., 19(1): 502–513. https://doi.org/10.1080/1828051X.2020.1761269
Reczyńska D, Witek B, Jarczak J, Czopowicz M, Mickiewicz M, Kaba J, Zwierzchowski L, Bagnicka E (2019). The impact of organic vs inorganic selenium on dairy goat productivity and expression of selected genes in milk somatic cells. J. Dairy Res., 86: 48–54. https://doi.org/10.1017/S0022029919000037
Russo MW (2007). How to review a meta-analysis. Gastroenterol. Hepatol., 3(8): 637-642.
Salman S, Dinse D, Khol-Parisini A, Schafft H, Lahrssen-Wiederholt M, Schreiner M, Scharek-Tedin L, Zentek J (2013). Colostrum and milk selenium, antioxidative capacity and immune status of dairy cows fed sodium selenite or selenium yeast. Arch. Anim. Nutr., 67(1): 48–61. https://doi.org/10.1080/1745039X.2012.755327
Sauvant D, Schmidely P, Daudin JJ, St-Pierre NR (2008). Meta-analyses of experimental data in animal nutrition. Animal, 2(8): 1203–1214. https://doi.org/10.1017/S1751731108002280
Schöne F, Steinhöfel O, Weigel K, Bergmann H, Herzog E, Dunkel S, Kirmse R, Leiterer M (2013). Selenium in feedstuffs and rations for dairy cows including a view of the food chain up to the consumer. J. Verbr. Lebensm., 8: 271–280. https://doi.org/10.1007/s00003-013-0827-y
Sevcikova S, Skrivan M, Dlouha G, Koucky M (2006). The effect of selenium source on the performance and meat quality of broiler chicken. Czech J. Anim. Sci., 51(10): 449–457. https://doi.org/10.17221/3964-CJAS
Shareef MA, Mohammed TR, Alrawi HM (2019). Effect of yeast (Saccharomyces cerevisiae) enhanced with selenium or zinc on the hematological characteristics in Iraqi Does Al-Anbar. J. Vet. Sci., 12(2): 75-81. https://doi.org/10.37940/AJVS.2019.12.2.9
Shi L, Ren Y, Zhang C, Yue W, Lei F (2018). Effects of organic selenium (Se-enriched yeast) supplementation in gestation diet on antioxidant status hormone profile and haematobiochemical parameters in Taihang Black Goats. Anim. Feed Sci. Technol., 238: 57-66. https://doi.org/10.1016/j.anifeedsci.2018.02.004
Silveira RM, Silva BEB, Vasconcelos AM, Facanha DAE, Martins TP, Rogerio MCP, Ferreiea J (2019). Does organic selenium supplement affect the thermoregulatory responses of dairy goats? Biol. Rhthm Res., 52(6): 869-881. https://doi.org/10.1080/09291016.2019.1607988
St-Pierre NR (2001). Invited review: Integrating quantitative findings from multiple studies using mixed model methodology. J. Dairy Sci., 84(4): 741–755. https://doi.org/10.3168/jds.S0022-0302(01)74530-4
Suroso GGA, Adhianto K, Muhtarudin M, Erwanto E (2023). Evaluasi Kecukupan Nutrisi Pada Sapi Potong di KPT Maju Sejahtera Kecamatan Tanjung Sari Kabupaten Lampung Selatan. J. Riset dan Inovasi Petern., 7(2): 147-155. https://doi.org/10.23960/jrip.2023.7.2.147-155
Tong M, Li S, Hui F, Meng F, Li L, Shi B, Zhao Y, Guo X, Guo Y, Yan S (2024). Effects of dietary selenium yeast supplementation on lactation performance antioxidant status and immune responses in lactating donkeys. Antioxidants, 13: 275. https://doi.org/10.3390/antiox13030275
Tozzi B, Liponi GB, Turchi B, Casini L, Fratini F, Minieri S, Incerti E, Gatta D (2016). Fortification of dairy goats’ products with various selenium sources. Large Anim. Rev., 22: 257-263.
Tsiplakou E, Mitsiopoulou C, Karaiskou C, Simoni M, Pappas AC, Righi F, Sotirakoglou K, Labrou NE (2021). Sesame meal, vitamin E and selenium influence goats antioxidant status. Antioxidants, 10(3): 392. https://doi.org/10.3390/antiox10030392
Vasconcelos AM, Rios MR, Martins TP, Bonfirm JM, Magalhaes YA, Pinheiro RR, Rogerio MCP, Facanha DAE, Ferreira J, Silveira RMF (2023). Organic selenium supplementation on metabolic profile of dairy goats. Trop. Anim. Health Prod., 55: 146. https://doi.org/10.1007/s11250-023-03572-w
Wang J, Zhang J, Zhong Y, Qin L, Li J (2021). Sex-dimorphic distribution and anti-oxidative effects of selenomethionine and Se-methylselenocysteine supplementation. J. Food Sci., 86(12): 5424-5238. https://doi.org/10.1111/1750-3841.15970
Yadav SP, Paswan VK, Singh P, Bhinchhar BK, Gupta PK (2018). Chemical composition and mineral profile of concentrate feeds from dairy farms of Varanasi, India Asian. J. Dairy Food Res., 37(3): 182-186. https://doi.org/10.18805/ajdfr.DR-1378
Żarczyńska K, Snarska A, Rytel L, Sobiech P (2018). Effect of a single-dose parenteral selenium supplement administered to pregnant dairy cows on selenium and iron concentrations and immune status of calves. Pol. J. Vet. Sci., 21(2): 401–403 https://doi.org/10.24425/119045.
Żarczyńska K, Sobiech P, Tobolski D, Mee JF, Illek J (2021). Effect of a single, oral administration of selenitetriglycerides, at two dose rates, on blood selenium status and haematological and biochemical parameters in Holstein-Friesian calves. Irish Vet. J., 74(1). https://doi.org/10.1186/s13620-021-00192-4
Zhang L, Liu XR, Liu JZ, An XP, Zhou ZQ, Cao BY, Song YX (2017). Supplemented organic and inorganic selenium affects milk performance and selenium concentration in milk and tissues in the Guanzhong dairy goat. Biol. Trace Element Res., 183(2): 254–260. https://doi.org/10.1007/s12011-017-1112-1
Zhang T, Qi M, Wu Q, Xiang P, Tang D, Li Q (2023). Recent research progress on the synthesis and biological effects of selenium nanoparticles. Front. Nutr., 10. https://doi.org/10.3389/fnut.2023.1183487
Ziaei N (2015). Effect of selenium and vitamin E supplementation on reproductive indices and biochemical metabolites in Raieni goats. J. Appl. Anim. Res., 43(4): 426-430. https://doi.org/10.1080/09712119.2014.980415
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