Progress in research of nutrition and life expectancy.
Biomedical and Environmental Sciences.2014;27(3):155-161. doi:10.3967/bes2014.036
Biomedical and Environmental Sciences
1988 to Present ISSN: 0895-3988
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Risk analysis of sulfites used as food additives in China.
Biomedical and Environmental Sciences.2014;27(2):147-154. doi:10.3967/bes2014.032
This study was to analyze the risk of sulfites in food consumed by the Chinese people and assess the health protection capability of maximum-permitted level (MPL) of sulfites in GB 2760-2011. Sulfites as food additives are overused or abused in many food categories. When the MPL in GB 2760-2011 was used as sulfites content in food, the intake of sulfites in most surveyed populations was lower than the acceptable daily intake (ADI). Excess intake of sulfites was found in all the surveyed groups when a high percentile of sulfites in food was in taken. Moreover, children aged 1-6 years are at a high risk to intake excess sulfites. The primary cause for the excess intake of sulfites in Chinese people is the overuse and abuse of sulfites by the food industry. The current MPL of sulfites in GB 2760-2011 protects the health of most populations.
Adolescent ; Adult ; Child ; Child, Preschool ; China ; Female ; Food Additives ; adverse effects ; standards ; Humans ; Infant ; Male ; Risk Assessment ; Sulfites ; adverse effects ; Young Adult
Adolescent ; Adult ; Child ; Child, Preschool ; China ; Female ; Food Additives ; adverse effects ; standards ; Humans ; Infant ; Male ; Risk Assessment ; Sulfites ; adverse effects ; Young Adult
Immune control strategies for vaccinia virus-related laboratory-acquired infections.
Biomedical and Environmental Sciences.2014;27(2):142-146. doi:10.3967/bes2014.031
While presenting biological characteristics of vaccinia virus and laboratory-acquired infections during related research processes, this paper focuses on benefits and risks of vaccinia virus immunization in relation to laboratory-acquired infections, describes characteristics and the adaptation of vaccinia virus vaccine, analyses the role vaccinia virus immunization plays in the prevention and control of laboratory-acquired infections, and finally proposes solutions and countermeasures to further promote and implement immune control strategies. The problem related to immune strategy and laboratory- acquired infections which is being raised, analyzed and explored plays an active and instructive role in vaccinia virus related researches and laboratory- acquired infections, and also helps to recommend and develop relevant immune strategy for future vaccine control of such infections.
Contraindications ; Humans ; Smallpox Vaccine ; adverse effects ; Vaccination ; standards ; Vaccinia ; immunology ; prevention & control ; Vaccinia virus ; immunology
Contraindications ; Humans ; Smallpox Vaccine ; adverse effects ; Vaccination ; standards ; Vaccinia ; immunology ; prevention & control ; Vaccinia virus ; immunology
Relaxin inhibit cardiac fibrosis induced by phorbol 12-myristate 13-acetate.
Biomedical and Environmental Sciences.2014;27(2):138-141. doi:10.3967/bes2014.030
Relaxin is known to inhibit cardiac fibrosis. However, it is unclear whether relaxin could regulate the effects of Phorbol 12-myristate 13-acetate (PMA, PKC activator) on cardiac fibrosis. So the influence of relaxin on the cell proliferation and collagen expression induced by PMA in cultured cardiac fibroblasts was studied. It showed that PMA significantly increased cardiac fibroblasts proliferation, Type I pro-collagen protein expression, Type I pro-collagen mRNA expression, and rhRLX absolutely significantly decreased PMA induced effects on cardiac fibroblasts proliferation and Type I pro-collagen expressions, indicating that relaxin could inhibit cardiac fibrosis induced by PMA.
Animals ; Animals, Newborn ; Cells, Cultured ; Fibroblasts ; pathology ; Fibrosis ; Heart Diseases ; chemically induced ; pathology ; prevention & control ; Rats ; Rats, Sprague-Dawley ; Relaxin ; therapeutic use ; Tetradecanoylphorbol Acetate ; analogs & derivatives
Animals ; Animals, Newborn ; Cells, Cultured ; Fibroblasts ; pathology ; Fibrosis ; Heart Diseases ; chemically induced ; pathology ; prevention & control ; Rats ; Rats, Sprague-Dawley ; Relaxin ; therapeutic use ; Tetradecanoylphorbol Acetate ; analogs & derivatives
Lateral flow immunoassay for quantitative detection of ractopamine in swine urine.
Biomedical and Environmental Sciences.2014;27(2):134-137. doi:10.3967/bes2014.029
A strip reader based lateral flow immunoassay (LFIA) was established for the rapid and quantitative detection of ractopamine (RAC) in swine urine. The ratio of the optical densities (ODs) of the test line (AT) to that of the control line (AC) was used to effectively minimize interference among strips and sample variations. The linear range for the quantitative detection of RAC was 0.2 ng/mL to 3.5 ng/mL with a median inhibitory concentration (IC50) of 0.59 ± 0.06 ng/mL. The limit of detection (LOD) of the LFIA was 0.13 ng/mL. The intra-assay recovery rates were 92.97%, 97.25%, and 107.41%, whereas the inter-assay rates were 80.07%, 108.17%, and 93.7%, respectively.
Animals ; Immunoassay ; Phenethylamines ; urine ; Reagent Strips ; Swine ; urine
Animals ; Immunoassay ; Phenethylamines ; urine ; Reagent Strips ; Swine ; urine
Carbon ion irradiation induces reduction of β-tubulin in sperm of pubertal mice.
Biomedical and Environmental Sciences.2014;27(2):130-133. doi:10.3967/bes2014.028
The development of a fluorescence polarization immunoassay for aflatoxin detection.
Biomedical and Environmental Sciences.2014;27(2):126-129. doi:10.3967/bes2014.027
A fluorescence polarization immunoassay (FPIA) was developed for the analysis ofaflatoxins (AFs) using an anti-aflatoxin B1 (AFB1) monoclonal antibody and a novel fluorescein-labeled AFB1 tracer. The FPIA showed an IC50 value of 23.33 ng/mL with a limit of detection of 13.12 ng/mL for AFB1. The cross-reactivities of AFB1, AFB2, AFG1, AFG2, AFM1, and AFM2 with the antibody were 100%, 65.7%, 143%, 23.5%, 111.4%, and 2%, respectively. The group-specificity of anti-AFB1mAb indicated that the FPIA could potentially be used in a screening method for the detection of total AFs, albeit not AFG2 and AFM2. The total time required for analyzing 96 samples in one microplate was less than 5 min. This study demonstrates the potential usefulness of the FPIA as a rapid and simple technique for monitoring AFs.
Aflatoxins ; analysis ; Fluorescence Polarization Immunoassay
Aflatoxins ; analysis ; Fluorescence Polarization Immunoassay
Subacute effect of decabromodiphenyl ethane on hepatotoxicity and hepatic enzyme activity in rats.
Biomedical and Environmental Sciences.2014;27(2):122-125. doi:10.3967/bes2014.026
Information regarding decabromodiphenyl ethane (DBDPE) effects on hepatotoxicity and metabolism is limited. In the present study, Wistar rats were given oral DBDPE at different doses. DBDPE induced oxidative stress, elevated blood glucose levels, increased CYP2B2 mRNA, CYP2B1/2 protein, 7-pentoxyresorufin O-depentylase (PROD) activity, and induced CYP3A2 mRNA, CYP3A2 protein, and luciferin benzylether debenzylase (LBD) activity. UDPGT activity increased with its increasing exposure levels, suggesting that oral DBDPE exposure induces drug-metabolizing enzymes in rats via the CAR/PXR signaling pathway. The induction of CYPs and co-regulated enzymes of phase II biotransformation may affect the homeostasis of endogenous substrates, including thyroid hormones, which may, in turn, alter glucose metabolism.
Animals ; Bromobenzenes ; toxicity ; Chemical and Drug Induced Liver Injury ; enzymology ; etiology ; Female ; Flame Retardants ; toxicity ; Liver ; drug effects ; metabolism ; Male ; Random Allocation ; Rats ; Rats, Wistar ; Toxicity Tests
Animals ; Bromobenzenes ; toxicity ; Chemical and Drug Induced Liver Injury ; enzymology ; etiology ; Female ; Flame Retardants ; toxicity ; Liver ; drug effects ; metabolism ; Male ; Random Allocation ; Rats ; Rats, Wistar ; Toxicity Tests
Biomedical and Environmental Sciences.2014;27(2):118-121. doi:10.3967/bes2014.025
Some unique subclasses of Camelidae antibodies are devoid of the light chain, and the antigen binding site is comprised exclusively of the variable domain of the heavy chain (VHH). The recombinant VHHs have a high potential as alternative reagents for the next generation of immunoassay. In particular, they might be very useful for molecular mimicry. The present study demonstrated an alpaca immunized with the F(ab')2 fragment of anti-aflatoxin B1 mAb and developed an important anti-idiotypic (anti-Id) responses. Antigen-specific elution method was used for panning private anti-Id VHHs from the constructed alpaca VHH library. The selected VHHs were expressed, renatured, purified, and then identified by a competitive enzyme-linked immunosorbent assay (ELISA). Our findings indicated that the VHH would be an alternative tool for haptens mimicry studies.
Aflatoxin B1 ; immunology ; Amino Acid Sequence ; Animals ; Antibodies, Anti-Idiotypic ; biosynthesis ; chemistry ; isolation & purification ; Camelids, New World ; immunology ; Immunoglobulin Heavy Chains ; chemistry ; isolation & purification ; Molecular Sequence Data
Aflatoxin B1 ; immunology ; Amino Acid Sequence ; Animals ; Antibodies, Anti-Idiotypic ; biosynthesis ; chemistry ; isolation & purification ; Camelids, New World ; immunology ; Immunoglobulin Heavy Chains ; chemistry ; isolation & purification ; Molecular Sequence Data
Biomedical and Environmental Sciences.2014;27(2):111-117. doi:10.3967/bes2014.024
OBJECTIVETo explore the role of HIV-1 tat gene variations in AIDS dementia complex (ADC) pathogenesis.
METHODSHIV-1 tat genes derived from peripheral spleen and central basal ganglia of an AIDS patient with ADC and an AIDS patient without ADC were cloned for sequence analysis. HIV-1 tat gene sequence alignment was performed by using CLUSTAL W and the phylogentic analysis was conducted by using Neighbor-joining with MEGA4 software. All tat genes were used to construct recombinant retroviral expressing vector MSCV-IRES-GFP/tat. The MSCV-IRES-GFP/tat was cotransfected into 293T cells with pCMV-VSV-G and pUMVC vectors to assemble the recombinant retrovirus. After infection of gliomas U87 cells with equal amount of the recombinant retrovirus, TNF-α, and IL-1β concentrations in the supernatant of U87 cells were determined with ELISA.
RESULTSHIV-1 tat genes derived from peripheral spleen and central basal ganglia of the AIDS patient with ADC and the other one without ADC exhibited genetic variations. Tat variations and amino acid mutation sites existed mainly at Tat protein core functional area (38-47aa). All Tat proteins could induce U87 cells to produce TNF-α and IL-1β, but the level of IL-1β production was different among Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen. The level of Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen were obviously higher than that from the non-ADC patient's basal ganglia.
CONCLUSIONTat protein core functional area (38-47aa) may serve as the key area of enhancing the secretion of IL-1β. This may be related with the neurotoxicity of HIV-1 Tat.
AIDS Dementia Complex ; metabolism ; pathology ; virology ; Adult ; Amino Acid Sequence ; Basal Ganglia ; virology ; Cell Line, Tumor ; Gene Expression Regulation, Viral ; Genes, tat ; HIV-1 ; genetics ; pathogenicity ; Humans ; Interleukin-1beta ; biosynthesis ; genetics ; secretion ; Middle Aged ; Molecular Sequence Data ; Neuroglia ; pathology ; secretion ; Spleen ; virology ; Tumor Necrosis Factor-alpha ; biosynthesis ; genetics ; secretion ; tat Gene Products, Human Immunodeficiency Virus ; genetics ; physiology
Country
China
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ElectronicLinks
http://www.besjournal.comEditor-in-chief
besjournal@sina.com
Abbreviation
Biomedical and Environmental Sciences
Vernacular Journal Title
生物医学与环境科学（英文）
ISSN
0895-3988
EISSN
Year Approved
2013
Current Indexing Status
Currently Indexed
Start Year
1988
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