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Zhang J, Zheng F, Liang C, Zhu Y, Shi Y, Han Y, Wang J. Sulfur dioxide inhalation lowers sperm quality and alters testicular histology via increasing expression of CREM and ACT proteins in rat testes. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 47:47-52. [PMID: 27614313 DOI: 10.1016/j.etap.2016.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 08/31/2016] [Accepted: 09/03/2016] [Indexed: 06/06/2023]
Abstract
Sulfur dioxide (SO2) is one of the main atmospheric pollutants worldwide, and is reported to be responsible for the formation of severe haze in China. Some studies have demonstrated a potential harmful effect of SO2 on the male reproductive system; however the underlying mechanism is still unknown. The purpose of this study is to investigate the roles of cytochrome P450 (P450), cAMP-responsive element modulator (CREM), and activator of CREM (ACT) in SO2-induced toxicity. Forty-eight male Wistar rats were randomly divided into an experimental and control group. The experiment group was exposed to SO2 in ambient air (10ppm, 4h/day), and the control group was treated with filtered air in the same conditions. After 2 weeks, the results showed a significant decrease in body weight and sperm motility, and an increase in the testis weight-to-body weight ratio as compared to the control group. Histological investigation suggested that SO2 exposure led to loose arrangement of the spermatogenic cells and local structural damage in the seminiferous tubules. Moreover, the expressions of P450, CREM and ACT proteins increased in the testes by 0.22%, 47.26% and 23.38%, respectively. Taken together, SO2 inhalation lowered sperm quality, altered testicular histology, and increased expressions of CREM and ACT proteins in the testes of rats. Overall, these results could contribute to a better understanding of SO2-induced male reproductive toxicity.
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Affiliation(s)
- Jianhai Zhang
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
| | - Fei Zheng
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Chen Liang
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yuchen Zhu
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yan Shi
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yongli Han
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jundong Wang
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
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Zhang J, Li Z, Qie M, Zheng R, Shetty J, Wang J. Sodium fluoride and sulfur dioxide affected male reproduction by disturbing blood-testis barrier in mice. Food Chem Toxicol 2016; 94:103-11. [PMID: 27237588 DOI: 10.1016/j.fct.2016.05.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 05/21/2016] [Accepted: 05/24/2016] [Indexed: 01/20/2023]
Abstract
Fluoride and sulfur dioxide (SO2), two well-known environmental toxicants, have been implicated to have adverse effects on male reproductive health in humans and animals. The objective of this study to investigate if the BTB is one of the pathways that lead to reproductive toxicity of sodium fluoride and sulfur dioxide alone or in combination, in view of the key role of blood testis barrier (BTB) in testis. The results showed that a marked decrease in sperm quality, and altered morphology and ultrastructure of BTB in testis of mice exposure to fluoride (100 mg NaF/L in drinking water) or/and sulfur dioxide (28 mg SO2/m(3), 3 h/day). Meanwhile, the mRNA expression levels of some vital BTB-associated proteins, including occluding, claudin-11, ZO-1, Ncadherin, α-catenin, and connexin-43 were all strikingly reduced after NaF exposure, although only the reduction of DSG-2 was statistically significant in all treatment groups. Moreover, the proteins expressions also decreased significantly in claudin-11, N-cadherin, α-catenin, connexin-43 and desmoglein-2 in mice treated with fluoride and/or SO2. These changes in BTB structure and constitutive proteins may therefore be connected with the low sperm quality in these mice. The role of fluoride should deserves more attention in this process.
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Affiliation(s)
- Jianhai Zhang
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Zhihui Li
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Mingli Qie
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Ruibo Zheng
- Shanxi Huawei Pharmaceutical Co. Ltd., Yuci, Shanxi, 030600, China
| | - Jagathpala Shetty
- Department of Cell Biology, Center for Research in Contraceptive and Reproductive Health, University of Virginia, Charlottesville, VA, 22908, USA
| | - Jundong Wang
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
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Min YG, Kim JW, Hong SC, Dhong HJ, Jarin PR, Jin Y. Pathogenetic mechanism of olfactory cell injury after exposure to sulfur dioxide in mice. Laryngoscope 2004; 113:2157-62. [PMID: 14660920 DOI: 10.1097/00005537-200312000-00020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study aimed to investigate the cellular pathogenetic mechanism involved in olfactory tissue injury and regeneration. STUDY DESIGN Adult male mice were exposed to 40 ppm SO2 for 2 hours. METHODS The mice were sacrificed immediately, 4 hours, and 1, 3, 5, 7, 10, 14, and 21 days after exposure to SO2. Olfactory neuroepithelium and bulbs were harvested at the time of sacrifice. Western blot and immunohistochemical staining were performed. RESULTS Injuries of the olfactory neuroepithelium were found 24 hours after exposure to SO2. The number of total olfactory neuroepithelial cells decreased after SO2 exposure and recovered after 3 weeks. In contrast, the number of proliferating cell nuclear antigen (PCNA)-positive cells increased after SO2 injury and then decreased. In the neuroepithelium, where PCNA expression increased, olfactory marker protein (OMP)-positive cells were sparse. The expression of inducible nitric oxide synthase (iNOS) was localized in the lateral half of the turbinates. However, there was no expression of iNOS in the medial half of the turbinates, in which PCNA was strongly expressed. There was increased immunoreactivity of neuronal NOS (nNOS) in the surviving cells after SO2 exposure. Immediately after exposure to SO2, the immunoreactivity to phosphorylated fraction of extracellular signal-regulated kinases (phospho-ERK)-1/2 increased in the cytoplasm and nucleus of supporting cells. In Western blot analysis, nNOS expression increased 4 hours after SO2 exposure. CONCLUSIONS These findings suggest that the regenerative activity of the neuroepithelium might be well demonstrated by PCNA immunoreactivity and that regeneration of the neuroepithelium can be activated several days after SO2 injury. The two NOS isoforms, iNOS and nNOS, might contribute to neuroprotection in the olfactory neuroepithelium.
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Affiliation(s)
- Yang-Gi Min
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, 28 Yongon-Dong, Gongno-Gu, Seoul 110-744, Korea.
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Ortiz-Pérez D, Rodríguez-Martínez M, Martínez F, Borja-Aburto VH, Castelo J, Grimaldo JI, de la Cruz E, Carrizales L, Díaz-Barriga F. Fluoride-induced disruption of reproductive hormones in men. ENVIRONMENTAL RESEARCH 2003; 93:20-30. [PMID: 12865044 DOI: 10.1016/s0013-9351(03)00059-8] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Fluoride-induced reproductive effects have been reported in experimental models and in humans. However, these effects were found in heavily exposed scenarios. Therefore, in this work our objective was to study reproductive parameters in a population exposed to fluoride at doses of 3-27 mg/day (high-fluoride-exposed group-HFEG). Urinary fluoride levels, semen parameters, and reproductive hormones in serum (LH, FSH, estradiol, prolactin, inhibin-B, free and total testosterone) were measured. Results were compared with a group of individuals exposed to fluoride at lower doses: 2-13 mg/day (low-fluoride-exposed group-LFEG). A significant increase in FSH (P<0.05) and a reduction of inhibin-B, free testosterone, and prolactin in serum (P<0.05) were noticed in the HFEG. When HFEG was compared to LFEG, a decreased sensitivity was found in the FSH response to inhibin-B (P<0.05). A significant negative partial correlation was observed between urinary fluoride and serum levels of inhibin-B (r=-0.333, P=0.028) in LFEG. Furthermore, a significant partial correlation was observed between a chronic exposure index for fluoride and the serum concentrations of inhibin-B (r=-0.163, P=0.037) in HFEG. No abnormalities were found in the semen parameters studied in the present work, neither in the HFEG, nor in the LFEG. The results obtained indicate that a fluoride exposure of 3-27 mg/day induces a subclinical reproductive effect that can be explained by a fluoride-induced toxic effect in both Sertoli cells and gonadotrophs.
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Affiliation(s)
- Deogracias Ortiz-Pérez
- Laboratorio de Toxicología Ambiental, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, Av. Venustiano Carranza 2405, Col. Lomas Filtros, CP 78210, San Luis Potosí, Mexico
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Fiore M, Petruzzi S, Dell'Omo G, Alleva E. Prenatal sulfur dioxide exposure induces changes in the behavior of adult male mice during agonistic encounters. Neurotoxicol Teratol 1998; 20:543-8. [PMID: 9761593 DOI: 10.1016/s0892-0362(98)00003-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sulfur dioxide (SO2) is one of the most important pollutants of the western countries, responsible for several cardiopulmonary diseases in humans. SO2 affects both young and adult people, causing low work productivity with social and economical costs extremely high for the communities. To test whether or not SO2 produces changes in social and/or agonistic behavior of laboratory animals, outbred CD-1 male mice were prenatally exposed to different SO2 concentrations (0, 5, 12, or 30 ppm) up to pregnancy day 14. At adulthood, following a 4-week isolation period, they underwent an aggressive encounter with CD-1 male opponents of the same age, body weight, and isolation condition (single 20-min session). The levels of several responses such as tail rattling, freezing, and defensive postures were reduced by the treatment, particularly during the initial period of the agonistic encounter, whereas offensive and attack behaviors were not significantly modified. In addition, rearing and social investigation increased. Overall, the present results indicate that prenatal SO2 exposure can alter mouse social/agonistic behavior, apparently acting on the approach phase toward the opponent and suggestive of changes in the animals' capability to cope with threatening dangerous situations.
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Affiliation(s)
- M Fiore
- Institute of Neurobiology, CNR, Rome, Italy.
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