scholarly journals ASPERMATOGENESIS IN THE GUINEA PIG INDUCED BY TESTICULAR TISSUE AND ADJUVANTS

1953 ◽  
Vol 97 (5) ◽  
pp. 711-726 ◽  
Author(s):  
Jules Freund ◽  
Murray M. Lipton ◽  
George E. Thompson
Keyword(s):  
Guinea Pig ◽  
Guinea Pigs ◽  
Seminiferous Tubules ◽  
Alcoholic Extract ◽  
Testicular Damage ◽  
Oil Emulsion ◽  
Paraffin Oil ◽  
Testicular Injury ◽  
Water In Oil Emulsion ◽  
Germinal Cells

The injection into the dorsal skin of a suspension of guinea pig testis or spermia incorporated in a water-in-oil emulsion containing killed mycobacteria induces aspermatogenesis in guinea pigs. The injury begins with the inhibition of the maturation of spermia and proceeds through the degeneration and exfoliation of spermatids, spermatocytes, and finally spermatogonia. These germinal cells pass from the seminiferous tubules into the epididymis. The process is not associated with inflammation. No significant changes occur in the intertubular spaces and the Leydig cells do not seem to be affected. The seminal vesicles and the prostate remain normal. The aspermatogenesis may begin in 10 days and it lasts for more than 5 months. The process may lead to atrophy of the seminiferous tubules and fibrosis. Guinea pigs which receive a suspension of their own testis or spermia and adjuvants develop a similar injury. The "mitochondrial" fraction of the testis of guinea pig is effective while repeated injections of alcoholic extract of testis emulsified with paraffin oil containing mycobacteria do not cause aspermatogenesis. The presence of acid-fast bacilli in the water-in-oil emulsion containing testis or spermia seems to be essential for the production of testicular lesions; the injection of antigen and mycobacteria into different sites is ineffective. When guinea pig testis is replaced by guinea pig liver or kidney or rabbit testis no testicular damage occurs. The injection of rabbit spinal cord combined with adjuvants results in allergic encephalomyelitis in a large proportion of guinea pigs, accompanied by a great loss of weight. The testes of a few of these animals show a varying degree of aspermatogenesis. When guinea pig brain is combined with adjuvants and administered subcutaneously the incidence of testicular injury is high, although the damage is, in general, mild. From the standpoint of mechanism, the inhibition of spermatogenesis which occurs in these animals may be unrelated to the injury which follows the injection of germinal cells. Aspermatogenesis follows the injection of killed mycobacteria in paraffin oil into the testis as well as into certain sites related to the gonad: the abdominal cavity, the subcutaneous tissue over the abdomen, and the skin of the inguinal region. Antibodies fixing complement in the presence of spermia are demonstrable in the sera of guinea pigs injected with testis or spermia and adjuvants. When the mycobacteria are omitted the titers are low and no testicular injury occurs. Although there seems to be a correlation between testicular damage and complement-fixing titer, this may not be a causal relationship. Antibodies which neutralize guinea pig hyaluronidase and those which immobilize spermia have also been demonstrated in the sera of these guinea pigs.

scholarly journals ASPERMATOGENESIS, ANAPHYLAXIS, AND CUTANEOUS SENSITIZATION INDUCED IN THE GUINEA PIG BY HOMOLOGOUS TESTICULAR EXTRACT

1955 ◽  
Vol 101 (6) ◽  
pp. 591-604 ◽  
Author(s):  
Jules Freund ◽  
George E. Thompson ◽  
Murray M. Lipton
Keyword(s):  
Acetic Acid ◽  
Guinea Pig ◽  
Ammonium Sulfate ◽  
Guinea Pigs ◽  
Anaphylactic Shock ◽  
Proteolytic Enzymes ◽  
Trichloracetic Acid ◽  
Oil Emulsion ◽  
Highly Active ◽  
Water In Oil Emulsion

Guinea pig testicles were extracted with acetic acid; the extract was purified by removing material in consecutive precipitations with 30 per cent saturated ammonium-sulfate, trichloracetic acid, and chloroform. The solution so purified, when administered with complete adjuvants, was highly active in inducing impairment of spermatogenesis in guinea pigs. The activity resisted autoclaving at 15 pounds' pressure for 20 minutes, proteolytic enzymes, and formamide. Anaphylactic shock and cutaneous reaction to the purified homologous extract occurred in guinea pigs sensitized by the extract combined with adjuvants. For the production of aspermatogenesis it was essential to incorporate killed mycobacteria into the water-in-oil emulsion containing the antigen; but anaphylactic sensitization did not require the presence of mycobacteria.

scholarly journals Toxicity and Reproductive Parameters Impairment of Cypermethrin in Male Guinea Pig (Cavia porcellus)

2018 ◽  
Vol 6 (2) ◽  
pp. 130 ◽  
Author(s):  
Bertin Narcisse Vemo ◽  
Augustave Kenfack ◽  
Ferdinand Ngoula ◽  
Edouard Akono Nantia ◽  
Claude Cedric Njieudeu Ngaleu ◽  
...  
Keyword(s):  
Body Weight ◽  
Guinea Pig ◽  
Sperm Count ◽  
Prostatic Acid Phosphatase ◽  
Domestic Animals ◽  
Seminiferous Tubules ◽  
Reproductive Parameters ◽  
Serum Concentrations ◽  
Total Protein Level ◽  
Germinal Cells

Cypermethrin is a large spectrum action insecticide, globally employed to control pests in agriculture and some human and domestic animals ectoparasites. This study aimed to evaluate its toxicity and reproduction impairment in male guinea pig. Forty adult male guinea pigs were divided into 4 groups and orally submitted to 0, 92, 137.5 and 275 mg/kg body weight/day for 90 days. The weight of the liver increased significantly, while that of kidneys decreased significantly in treated animals compared to controls. Serum concentrations of creatinine, urea, ALAT, ASAT, total cholesterol, prostatic acid phosphatase increased significantly, while the testicular total protein level decreased significantly in groups given the insecticide relatively to the control. The testes weight, libido, serum level of testosterone, mobility, sperm count and the percentage of spermatozoa with entire plasma membrane decreased significantly in animals exposed to cypermethrin with reference to controls. The percentages of abnormal spermatozoa increased significantly in animals submitted to 137.5 or 275 mg/kg body weight (bw) of cypermethrin compared to control ones. On the testis histological sections of pesticide-treated animals, immature germinal cells were observed in the lumen of seminiferous tubules. Cypermethrin was toxic in male guinea pig and damaged reproductive parameters.

scholarly journals A HISTOLOGIC STUDY OF THE AUTO-ALLERGIC TESTIS LESION IN THE GUINEA PIG

1959 ◽  
Vol 109 (3) ◽  
pp. 311-324 ◽  
Author(s):  
Byron H. Waksman
Keyword(s):  
Connective Tissue ◽  
Guinea Pig ◽  
Inflammatory Disease ◽  
Guinea Pigs ◽  
Testicular Atrophy ◽  
Seminiferous Tubules ◽  
Germinal Cell ◽  
Histologic Study ◽  
Cellular Infiltrate ◽  
Gm Animals

The auto-allergic lesion in guinea pigs inoculated with homologous testis plus the Freund adjuvant was investigated histologically. The lesion was found to consist of disseminated foci of perivenous inflammation, lymphocytes and histiocytes predominating in the cellular infiltrate, with invasion of epididymal, rete, and seminiferous tubules and destruction of tubular contents. Guinea pigs up to 800 gm. showed a rapidly progressing diffuse hypo- or aspermatogenesis, which appeared to be secondary to the inflammatory disease. In these animals, the process resolved leaving an atrophic testis with few or no indications of the preceding inflammation and fibrotic scarring only in the rare instances in which actual necrosis of connective tissue elements had occurred. In 1200 gm. animals there was no general hypospermatogenesis and the late findings were limited to foci of aspermatogenesis. This disease then is an experimental auto-allergic orchitis followed by testicular atrophy without scarring. Its morphologic similarity to mumps orchitis and to sterility with "germinal cell aplasia" in man is commented on.

scholarly journals THE RÔLE OF THE "WAX" OF THE TUBERCLE BACILLUS IN ESTABLISHING DELAYED HYPERSENSITIVITY

1949 ◽  
Vol 90 (1) ◽  
pp. 53-72 ◽  
Author(s):  
Sidney Raffel ◽  
Louis E. Arnaud ◽  
C. Dean Dukes ◽  
Jwo S. Huang
Keyword(s):  
Guinea Pigs ◽  
Delayed Hypersensitivity ◽  
Tubercle Bacillus ◽  
Adjuvant Activity ◽  
Oil Emulsion ◽  
Similar Activity ◽  
Egg Albumin ◽  
Antibody Titers ◽  
Picryl Chloride ◽  
Water In Oil Emulsion

Guinea pigs sensitized with egg albumin along with the purified wax fraction of the human tubercle bacillus respond with delayed hypersensitive reactivity to the protein antigen. Previous publications have reported a similar activity of the wax with respect to tuberculoprotein and picryl chloride. The effect is not referable to an ordinary adjuvant activity of the bacillary wax, since antibody titers are not increased in animals which receive it, and since a known adjuvant, water-in-oil emulsion, has no effect with respect to the induction of delayed hypersensitivity. This report further extends the rôle of the tubercle bacillary wax in the induction of delayed hypersensitive states.

scholarly journals Spermatogenesis after Transplantation of Adipose Tissue-Derived Stem Cells in Azoospermic Guinea Pigs: A Histological and Histomorphometric Study

2018 ◽  
Vol 7 ◽  
pp. e1000
Author(s):  
Mehrdokht Hajihoseini ◽  
Davood Mehrabani ◽  
Akbar Vahdati ◽  
Seyed Ebrahim Hosseini ◽  
Amin Tamadon ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Guinea Pigs ◽  
Seminiferous Tubules ◽  
Control Group ◽  
Interval Group ◽  
Histomorphometric Study ◽  
Normal Spermatogenesis ◽  
Group 3 ◽  
Germinal Cells ◽  
Effective Source

Background: The purpose of this research was to determine histomorphometric changes in busulfan-induced azoospermia after transplantation of AdSCs in guinea pig. AdSCs were isolated from adipose tissue around the testes of guinea pigs and characterized for mesenchymal properties.Materials and Methods: Guinea pigs were allocated into three groups, including the control group without any intervention. To induce azoospermia, groups 2 and 3 received a dose of 40 mg/kg of busulfan with 21 days interval. Group 3 received 1×106 AdSCs in their seminiferous tubules of left testes, 35 days following last busulfan injection, while right testis in the group was considered for comparison as controls. Sixty days following transplantation of cell, histomorphometric and histopathologic changes of the experiments were assessed.Results: After AdSCs’ transplantation, normal spermatogenesis appearance was noticed compared to busulfan-induced azoospermia and AdSCs recovered spermatogenesis, and our findings can be added to the literature in treating azoospermic infertilities.Conclusion: The transplanted AdSCs could induce production of germinal cells using testicular seminiferous tubules and were an effective source in treating azoospermia.[GMJ.2018;7:e1000]

Radioprotective effect of febuxostat against testicular damage induced by ionizing radiation in mice

2021 ◽  
Vol 14 ◽  
Author(s):  
Fereshteh Talebpour Amiri ◽  
Marziyeh Raeispour ◽  
Soghra Farzipour ◽  
Seyed Jalal Hosseinimehr
Keyword(s):  
Oxidative Stress ◽  
Prostate Cancer ◽  
Biochemical Parameters ◽  
Seminiferous Tubules ◽  
Pelvic Radiotherapy ◽  
Testicular Damage ◽  
Male Adult ◽  
Oxidative Stress Parameters ◽  
Adult Mice ◽  
Testicular Injury

Background: The testis is one of the most radiosensitive tissues in pelvic radiotherapy, especially in prostate cancer. Febuxostat (FBX), as an inhibitor of xanthine oxidase, has anti-inflammatory, antioxidant, and anti-apoptosis properties. Objectives: The aim of this research was to survey the protective effect of FBX against irradiation (IR)-induced testis damage via the attenuation of oxidative stress. Methods: Male adult mice were randomly assigned into eight groups: control, FBX with three doses of 5, 10, and 15 mg/kg, IR with 6 Gy, IR + FBX (IR + FBX in three doses), respectively. In the IR + FBX groups, FBX was administrated for 8 consecutive days, and then mice were exposed to IR at a dose of 6 Gy on the 9th day. One day after irradiation, biochemical parameters were evaluated in the testis of animals, while histopathological assessment had been performed on 14th day. Results: Irradiation led to the induction of testicular toxicity. FBX significantly protected histopathological alterations and decreased oxidative stress parameters in irradiated testis. Besides, FBX increased the diameter and germinal epithelial thickness of seminiferous tubules and Johnson’s score in irradiated mice. Conclusion: Data showed that FBX markedly protected testicular injury induced by IR by inhibiting oxidative stress and may be considered as an infertility inhibitor in cancer patients, especially prostate cancer.

scholarly journals ADJUVANTS IN IMMUNIZATION WITH INFLUENZA VIRUS VACCINES

1944 ◽  
Vol 80 (6) ◽  
pp. 477-491 ◽  
Author(s):  
William F. Friedewald
Keyword(s):  
Influenza Virus ◽  
High Speed ◽  
Allantoic Fluid ◽  
Sesame Oil ◽  
Oil Emulsion ◽  
Paraffin Oil ◽  
Antigenic Material ◽  
Water In Oil Emulsion ◽  
Antibody Levels ◽  
Subcutaneous Inoculation

Subcutaneous inoculation, of PR8 allantoic fluid, or watery suspensions of the virus obtained from allantoic fluid by high-speed centrifugation or by elution after adsorption on red cells induced serum antibodies in experimental animals, which reached the highest levels within 2 weeks after inoculation and were gradually lost thereafter. The addition of killed acid-fast bacteria (Myco. tuberculosis or butyricum), paraffin oil, and a proprietary adsorption base (Falba) to form a stable water-in-oil emulsion of influenza virus suspensions greatly enhanced and maintained immunity and antibody response to the virus. These adjuvants provided a much more effective method of increasing antibody production to the virus than the use of concentrated preparations of virus alone. Paraffin oil and Falba without the acid-fast bacilli were less effective as adjuvants, although the antibody levels induced were higher than those produced by watery suspensions of the virus and were maintained at a constant level for at least 6 months. Myco. butyricum appeared to be more effective in producing antibodies against the virus than the tubercle bacilli in the emulsions of paraffin oil and Falba. Immunization with these adjuvants and suspensions of influenza virus obtained from allantoic fluid induced antibodies not only against the virus but against antigenic material contained in normal allantoic fluid, although the latter titers were considerably lower. A suspension of influenza virus (sedimented by high-speed centrifugation) and Myco. butyricum in sesame oil induced about four times as much antibody as when the virus was suspended in saline, in sesame oil alone, or in combination with typhoid bacilli.

scholarly journals Studies on Postnatal Development of Testis of Guinea Pig (Cavia porcellus)

2021 ◽  
Vol 12 (5) ◽  
pp. 477-484
Author(s):  
S. Rajathi ◽  
◽  
Geetha Ramesh ◽  
T. A. Kannan ◽  
K. Raja ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Sertoli Cells ◽  
Guinea Pigs ◽  
Tunica Albuginea ◽  
Age Groups ◽  
Seminiferous Tubules ◽  
Interstitial Tissue ◽  
Left Testis

The histology and histochemistry of the testis of guinea pig of various postnatal age groups was conducted. A total of 24 guinea pigs of four different postnatal ages with six male animals each were collected from the Department of Laboratory Animal Medicine, Madhavaram Milk Colony, Chennai as per the Ethical committee approval. After collection, animals were euthanized as per CPCSEA norms and testis was dissected out and was cut into small pieces, fixed and processed for paraffin embedding. Sections of 4–5 µm thickness were cut and used for the routine and special histological and histochemical staining techniques. Testes wereencapsulated by tunica vaginalis and tunica albuginea. Septa from the capsule divided the testicular parenchyma into lobules. Each lobule consisted of seminiferous tubules which consisted of spermatogenic cells in stratified layers and sertoli cells. Pre-weaning and weaning group of guinea pigs seminiferous tubules showed wide lumen with only type 1 and type 2 spermatogonia and sertoli cells. Young and adult animals seminiferous tubules showed narrow lumen with type 1 and type 2 spermatogonia, primary spermatocytes in various stages of differentiation, secondary spermatocytes, spermatids (early and late) and sertoli cells. Sertoli cells were large oval shaped cells with lightly stained irregular shaped nucleus. Interstitial tissue contained leydig cells in all ages.Leydig cells appeared as varied in shape. In all the age groups studied, PAS activity was noticed in the capsule and basement membrane. The micrometrical parameters increased as age advanced in both right and left testis.

scholarly journals Cornuside Alleviates Diabetes Mellitus-Induced Testicular Damage by Modulating the Gut Microbiota

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Liping Liu ◽  
Anmei Shu ◽  
Yihui Zhu ◽  
Yuping Chen
Keyword(s):  
Diabetes Mellitus ◽  
Gut Microbiota ◽  
Seminiferous Tubules ◽  
Sequencing Analysis ◽  
Testicular Damage ◽  
Uncultured Bacterium ◽  
Potential Biomarker ◽  
Rdna Sequencing ◽  
Testicular Injury ◽  
Ay Mice

Background. Male reproductive damage, as a common complication of diabetes mellitus (DM), is getting more attention lately. We aimed to explore the protective effects and mechanism of cornuside (Cor) modulating gut microbiota to alleviate diabetes mellitus- (DM-) induced testicular damage. Methods. KK-Ay mice with reproductive damage were randomly divided into the model and Cor treatment groups, and the C57BL/6J mice were used as the normal group. These mice were orally administered Cor for 8 weeks. Results. Cor administration ameliorated the diabetes-related symptoms of polydipsia and polyphagia and lowered the fasting blood glucose (FBG) level. The results of pathological injury showed that Cor improved testicular lesions (the rupture of seminiferous tubules, degeneration of germ cells, and structural shrinkage and separation from each other) in DM model mice. Cor significantly increased the testis/body weight ratio, testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in KK-Ay mice. Cor also protected from reproductive damage by inhibiting apoptosis in the testes of KK-Ay mice. Moreover, Cor significantly increased the sperm count and sperm motility. Additionally, 16S rDNA sequencing analysis showed that Cor could notably reverse the changes in the distribution of gut microbiota and decrease the abundance of Weissella confusa (Weissella), Clostridium sp. ND2 (Clostridium sensu stricto 1), uncultured bacterium (Roseburia), Anaerotruncus colihominis DSM 17241 (Anaerotruncus), [Clostridium] leptum (Anaerotruncus), unidentified (Ruminococcus 1), and uncultured bacterium (Bilophila), which may be a potential biomarker for diagnosing the testicular injury caused by DM. Meanwhile, the heat map of phylum level suggested that the testicular injury caused by DM is closely related to gut microbiota. Conclusions. Cor could alleviate DM-induced testicular damage, probably by modulating the gut microbiota.

scholarly journals Morphological development of the testicles and spermatogenesis in guinea pigs (Cavia porcellus Linnaeus, 1758)

2017 ◽  
Vol 34 (03) ◽  
pp. 143-151
Author(s):  
A. Nunes ◽  
J. Santos ◽  
B. Gouveia ◽  
V. Menezes ◽  
M. Matos ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Guinea Pigs ◽  
Microstructural Analysis ◽  
Transition Time ◽  
Human Reproduction ◽  
Seminiferous Tubules ◽  
Testicular Development ◽  
Morphological Development ◽  
Tubular Diameter

Abstract Introduction: Understanding the dynamics of spermatogenesis is crucial to clinical andrology and to understanding the processes which define the ability to produce sperm. However, the entire process cannot be modeled in vitro and guinea pig may be an alternative as animal model for studying human reproduction. Objective: In order to establish morphological patterns of the testicular development and spermatogenesis in guinea pigs, we examined testis to assess changes in the testis architecture, transition time from spermatocytes to elongated spermatids and stablishment of puberty. Materials and methods: We used macroscopic analysis, microstructural analysis and absolute measures of seminiferous tubules by light microscopy in fifty-five guinea pigs from one to eleven weeks of age. Results: Differences in relation to mass, length and width of the testes appeared at week 3 and were intensified in week 6 with the puberty. At week 2 the first spermatocytes at preleptotene/leptotene appeared, indicating the onset of meiosis. At week 6 the seminiferous tubules formed lumen, differentiated Sertoli cells and all kinds of germ cells; spermatozoa released into the lumen and the largest expansion of tubular diameter and height of the seminiferous epithelium occurred. Transition time from spermatocytes to elongated spermatids was estimated in 21 days. Conclusion: We conclude that the testicular development and puberty are faster than in other mammal and rodent species, demonstrating the suitability of the guinea pig testes as a model for studies of the testicular development and spermatogenesis.

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