Abstract：
:Parathion is a widely used organophosphoric pesticide which has also been reported to interfere with mouse spermatogenesis. Moreover it has been related to prenatal toxicity in mammals. Sixteen A/ Snell mice were sacrificed at day 17 of pregnancy. Testes and epididymides of the male fetuses were implanted in the allantochorion of chicken eggs. Three experimental conditions of the egg injections were considered: Group I: 1 ml of parathion (0.5 mg/ml), Group II: 1 ml of parathion (1 mg/ml), and Group III: 1 ml distilled water (control group). The implanted subjects continued their development for 4 days (i.e. to complete the gestational period for mice). The cell proliferation and differentiation of the epithelial cells of the epididymis were evaluated with the use of the monoclonal antiproliferating cell nuclear antigen (PCNA-cyclin) antibody, and the AE1 keratin complex antibody. Parathion altered the allantochorion, as 15% of the chicken embryos died in Group I and 40% in Group II, vs. only 8% in controls (Group III). However, no malformations were seen in the surviving embryos. In the testicular implants, the seminiferous cords of Group I had the same cytological characteristics of germ and pre-Sertoli cells as the control, except for involuting Leydig cells. Contrarily, in the cases with higher doses of parathion (Group II), there was a complete disorganisation of the seminiferous cords and the interstitium. In some testes, hyaline degeneration of the seminiferous cords was observed. No cell proliferation was evident, and the epididymal morphology was apparently unaffected. Therefore, parathion seems to interfere with normal testicular differentiation. However, in spite of interstitial damage, the epididymal development seems unaltered. Since the epididymis is an androgen-dependent organ, it may be postulated that testosterone production is still sufficient to support epididymal development but not spermatogenic cell line differentiation.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Rojas M,Bustos-Obregón E,Martínez-García F,Contreras H,Regadera Jdoi
10.1007/978-1-4899-0089-0_23subject
Has Abstractpub_date
1998-01-01 00:00:00pages
201-6eissn
0065-2598issn
2214-8019journal_volume
444pub_type
杂志文章abstract：:Peripheral blood lymphocytes of 29 c-ANCA positive WG patients fulfilling the ACR classification criteria were examined for the expression of various leukocyte surface molecules by dual marker cytofluorometry (FACStar, Becton Dickinson). Activation markers such as CD25, HLA-DR, CD29 and adhesion molecules (ICAM-1 and ...
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journal_title：Advances in experimental medicine and biology
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：1995-01-01 00:00:00
abstract：:Erdosteine as a mucolytic agent that decreases mucus viscosity and facilitates mucus expulsion from the airways by cough or ciliary movement. Our objective was to determine whether erdosteine can directly contribute to mucus clearance. We addressed the issue by monitoring acute and chronic effects of erdosteine on cil...
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pub_type： 临床试验,杂志文章
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更新日期：1999-01-01 00:00:00
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abstract：:Both hepatic lipogenesis from glucose and gluconeogenesis from lactate are inhibited by substrates for mixed function oxidation such as aminopyrine. These effects are inducible with phenobarbital pretreatment and absent with a demethylated product of aminopyrine metabolism, aminophenylpyrazolone. The data indicate tha...
journal_title：Advances in experimental medicine and biology
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更新日期：1975-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
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journal_title：Advances in experimental medicine and biology
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doi：10.1007/978-0-387-74911-2_23
更新日期：2008-01-01 00:00:00
abstract：:In order to clarify the significance of the renal kallikrein(KAL)-kinin(KIN) system and prostaglandins (PG) in exaggerated natriuresis in essential hypertensives, the effect of acute sodium load on urinary KAL, KIN, PG, and renal water and sodium handling were investigated in normotensives (NT) and patients with essen...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-0154-8_42
更新日期：1986-01-01 00:00:00
