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Rajatachandrodaya Rasa (RC) is a Sagandha, Sagni, Parada Moorchana which is Kanthastha and Bahirdhooma Kupipakwa Rasayana prepared as per the guidelines of Bheshaja Samhita. RC was prepared with 1:8:16 proportions of Shodhita Rajata, Shodhita Parada and Shodhita Gandhaka by Kupipaka method. RC is having therapeutic potential ranging in diseases such as Hridroga, Madhumeha, and Jwara and also possesses Rasayana and Vajeekarana properties. Till date, no reported studies are available pertaining to vajikarana effect of Rajatachandrodaya Rasa. Hence an attempt has been made to evaluate spermatogenic activity of RC experimentally on wistar strained male Albino rats and compared to Siddha Makaradhwaja.Animal experimental study of RC done on Albino Male rats under all necessary precautions. RC was taken in two different doses (0.45 mg/0.2kg &0.54 mg/0.2kg.b.wt) and compared with Control (distilled water & food) and Standard (Siddha Makaradhwaja) groups. Study shows increase in sperm count (up to 95-99 million) which shows effect of RC on spermatogenesis. It showed statistically significant (p<0.05) Spermatogenic activity compared to control group (p<0.05) & standard group (p<0.05). Histopathological study also showed increase in size of seminiferous tubules. Basement membrane was tightly bound with germinal epithelium. The lumen of seminiferous tubule was filled with bundles of Spermatozoa suggestive of significant Spermatogenic activity.
International Journal of Andrology, 1989
Maintenance and development of spermatocytes and round spermatids was studied in an in-vitro incubation system. This system consisted of open tubule fragments from 26-day-old rat testes, obtained after collagenase treatment. The tubule fragments contained Sertoli cells and spermatogenic cells up to and including a small number of early round spermatids. The number of primary spermatocytes and round spermatids in the tubule fragments was estimated using flow-cytometric analysis, immediately after isolation and after 72 h of incubation. In addition, the activity of LDH-C4 in the tubule fragments was measured. After 72 h of incubation, the percentage of spermatocytes was reduced by 70-80%, but the percentage of spermatids was doubled. The total LDH-C4 activity per well was increased 2-3-fold during 72 h of incubation of the fragments. A modest improvement of the culture results was observed when a combination of FSH, insulin, retinol and testosterone was added to the medium. LDH-C4 activity was investigated to see whether it could be used as a quantitative marker of isolated and cultured spermatocytes and spermatids. It was observed that LDH-C4 activity per cell was decreased when spermatocytes and spermatids were isolated and/or incubated at 4°C. However, the cellular enzyme activity returned to control values during subsequent incubation of the cells at 32"C, either in the absence or presence of a protein synthesis inhibitor. Cellular LDH-C4 activity may be influenced not only by temperature, but possibly also by other cell isolation conditions. It is concluded that LDH-C4 activity may not be a reliable quantitative marker for the presence of spermatocytes and spermatids in culture, but should be used in combination with other analytical methods such as DNA estimation and DNA flow cytometry.
Selcuk journal of agriculture and food sciences, 2004
The aim of this study is to determine the effect of injecting a mixture of Serine and Threonine on spermatogenic function within testes of prepubertal mice (QS strain). Therefore, the mice were injected with Saline (Control) or a mixture of Serine and Threonine (Test) for 5 days. Following the last injection, the testes were removed and dehydrated then stained with PAS (Periodic Acid Schiff). The diameter of tubules, diameter of Leydig cells and the numbers of round spermatids were measured on sections of the testes. The number of stage round spermatids was decreased by Serine and Threonine injection (P<0.05). The total numbers of round spermatids per testis for control and test groups were detected as 1.66±0.32 and 1.06±0.05 (x10 6 /mm 3) respectively. This experiment shows that Serine and Threonine injection reduced the number of round spermatids while the diameters of Leydig cells and the diameters of tubules were not affected. The reason for reduced number of round spermatids might be a result of increased expression of TGF-βs which might increase the apoptosis of the spermatogonia and this probably resulted with the reduction in the number of round spermatids.
Molecular Human Reproduction
Do the organ culture conditions, previously defined for in vitro murine male germ cell differentiation, also result in differentiation of rat spermatogonia into post-meiotic germ cells exhibiting specific markers for haploid germ cells? SUMMARY ANSWER: We demonstrated the differentiation of rat spermatogonia into post-meiotic cells in vitro, with emphasis on exhibiting, protein markers described for round spermatids. WHAT IS KNOWN ALREADY: Full spermatogenesis in vitro from immature germ cells using an organ culture technique in mice was first reported 5 years ago. However, no studies reporting the differentiation of rat spermatogonia into post-meiotic germ cells exhibiting the characteristic protein expression profile or into functional sperm have been reported. STUDY DESIGN, SAMPLES/MATERIALS, METHODS: Organ culture of testicular fragments of 5 days postpartum (dpp) neonatal rats was performed for up to 52 days. Evaluation of microscopic morphology, testosterone levels, mRNA and protein expression as measured by RT-qPCR and immunostaining were conducted to monitor germ cell differentiation in vitro. Potential effects of melatonin, Glutamax® medium, retinoic acid and the presence of epidydimal fat tissue on the spermatogenic process were evaluated. A minimum of three biological replicates were performed for all experiments presented in this study. One-way ANOVA, ANOVA on ranks and student's t-test were applied to perform the statistical analysis. MAIN RESULTS AND THE ROLE OF CHANCE: Male germ cells, present in testicular tissue pieces grown from 5 dpp rats, exhibited positive protein expression for Acrosin and Crem (cAMP (cyclic adenosine mono phosphate) response element modulator) after 52 days of culture in vitro. Intra-testicular testosterone production could be observed after 3 days of culture, while when epididymal fat tissue was added, spontaneous contractility of cultured seminiferous tubules could be observed after 21 days. However, no supportive effect of the supplementation with any factor or the co-culturing with epididymal fat tissue on germ cell differentiation in vitro or testosterone production was observed. LIMITATIONS, REASONS FOR CAUTION: The human testis is very different in physiology from the rat testis, further investigations are still needed to optimize the organ culture system for future use in humans. WIDER IMPLICATIONS OF THE FINDINGS: The successful differentiation of undifferentiated spermatogonia using the testis explant culture system might be employed in future to produce sperm from human spermatogonia as a clinical tool for fertility preservation in boys and men suffering infertility.
The Tohoku Journal of Experimental Medicine, 1995
ACTA SCIENTIFIC MICROBIOLOGY, 2018
Asian Journal of Andrology, 2009
The contraceptive efficacy of Carica papaya seeds after short-term evaluation has been well established. We have examined the safety and mechanism of contraception in rats after long-term treatment with the methanol subfraction (MSF) of C. papaya seeds. The test substance was administered orally to the male albino rats (n = 40) at 50 mg per kg body weight each day for 360 days. Control animals (n = 40) received olive oil as a vehicle. Recovery was assessed up to 120 days after treatment withdrawal. Sperm parameters, serum testosterone levels, fertility, histology and ultrastructure of the testis, haematology and serum clinical chemistry were evaluated to establish the safety and efficacy of the test substance. Safety of long-term treatment was evidenced by unaltered health status, organ weight, haematology and clinical chemistry, and by an increase in body weight. The mechanism of contraception was shown by reduction in nuclear and cytoplasmic volume, normal nuclear characteristics and vacuolization in the cytoplasmic organelles of the Sertoli cells, as well as nuclear degeneration in spermatocytes and spermatids indicating disturbed spermatogenesis. Leydig cells were normal. Initial effects were observed in Sertoli cells at 60 days of treatment. Spermatocytes and spermatids were affected after 120-240 days of treatment. A significant decline in sperm count and viability, total inhibition of sperm motility, increased numbers of sperm abnormalities, normal serum testosterone levels and 100% sterility were evident after 60 days of treatment. All the altered parameters, including percent fertility, were restored to control level 120 days after treatment withdrawal. It is concluded that the MSF is safe for long-term treatment and the mechanism of contraception is shown by its effect on spermatid differentiation in the testis, possibly mediated by the Sertoli cell factors.
A procedure is described which permits the isolation from the prepuberal mouse testis of highly purified populations of primitive type A spermatogonia, type A spermatogonia, type B spermatogonia, preleptotene primary spermatocytes, leptotene and zygotene primary spermatocytes, pachytene primary spermatocytes, and Sertoli cells. The successful isolation of these prepuberal cell types was accomplished by: (a) defining distinctive morphological characteristics of the cells, (b) determining the temporal appearance of spermatogenic cells during prepuberal development, (c) isolating purified seminiferous cords, after dissociation of the testis with collagenase, (d) separating the trypsin-dispersed seminiferous cells by sedimentation velocity at unit gravity, and (e) assessing the identity and purity of the isolated cell types by microscopy. The seminiferous epithelium from day 6 animals contains only primitive type A spermatogonia and Sertoli cells. Type A and type B spermatogonia are present by day 8. At day 10, meiotic prophase is initiated, with the germ cells reaching the early and late pachytene stages by days 14 and 18, respectively. Secondary spermatocytes and haploid spermatids appear in increasing numbers between days 18 and 20. Cell separations were attempted throughout this developmental period. The purity and optimum day for the recovery of specific cell types are as follows: day 6, Sertoli cells (purity >99%) and primitive type A spermatogonia (90%); day 8, type A spermatogonia (91%) and type B spermatogonia (76%); day 18, preleptotene spermatocytes (93%), leptotene/zygotene spermatocytes (52%), and pachytene spermatocytes (89%).
Zeitschrift für Zellforschung und Mikroskopische Anatomie, 1970
This paper reports the results of detailed studies of the morphology of living and of specially fixed and stained spermatogenic cells of the mouse. Particular emphasis was given to studies of multinucleate cells. Evidence is presented to show that such cells may be found in all stages of spermatogenesis from type A spermatogonia onward. Spermatogenic cells containing odd numbers of nuclei appeared to be as frequent as those containing even numbers. After considering various lines of evidence bearing on the probably origin (s), fate and biological significance of multinucleate cells it was concluded that: (1) multinucleate cells do exist in vivo; (2) they may be generated either through the failure of cytokinesis, the coalescence of conjoined sister cells, or both; (3) multinucleate cells containing odd numbers of nuclei are generated from even-numbered parents, by addition or substraction of nuclei, through an auxiliary mechanism involving cell fusions and/or a pinching-off process; (4) multinucleates undergo normal meiotic development and give rise to apparently normal spermatozoa; and (5) the multinucleate condition is another cytological indication of the biological importance of synchronous differentiation in gametogenesis.
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