Displaying publications 1 - 20 of 136 in total

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  1. Sperm attributes and morphology on Rusa timorensis: light and scanning electron microscopy
    Mahre MB, Wahid H, Rosnina Y, Jesse FF, Azlan CA, Khumran AM, et al.
    Anim. Reprod. Sci., 2014 Aug;148(3-4):245-50.
    PMID: 25015846 DOI: 10.1016/j.anireprosci.2014.06.006
    This study provides standard information on the attributes of sperm and describes the surface structure of normal and abnormal spermatozoa of Rusa timorensis. Two fertile stags were used as the source of semen collected during the first breeding season commencing from April 5 to July 2, 2012. Another five stags were used as the source of semen collected during the second breeding season commencing from April 1 to June 27, 2013. Semen samples were collected from the stags using an electro-ejaculator. The ejaculate was processed and samples prepared for light and scanning electron microscopy (SEM) according to standard methods. No significant difference (P>0.05) was found between sperm attributes in comparison between different stags and different months of the fertile seasons. The results of this study have also demonstrated that there are no differences in size, shape and surface structure between spermatozoa of the different stags and different months of the fertile seasons. Sperm attributes (volume, pH, sperm concentration, general motility, progressive motility and viability) were 2.2±0.29 ml, 7.2±0.17, 886.3±39.7×10(6) spermatozoa/ml, 78.7±2.01%, 80.8±1.85% and 83.2±0.85%, respectively. Morphological analysis showed low percentage of abnormal spermatozoa 13.9±2.88%. Scanning electron microscopy revealed spermatozoa which consisted of a flat paddle-shaped head, short neck and a tail, which was subdivided into midpiece, principal piece and endpiece. The average spermatozoon was 66.2±0.69 μm in total length. The flat paddle-shaped head was 7.8±0.28 μm long, 4.2±0.15 μm at its widest width, 2.4±0.18 μm basal width and 0.7±0.0 2μm thick. As for the tail, the midpiece length was 13.2±0.14 μm, 0.6±0.04 μm in diameter; the principal piece was 42.6±0.04μm, and 2.8±0.06 μm for the endpiece. Abnormal spermatozoa such as tapered head, microcephalic head, decapitated spermatozoa and bent tails were observed. Results provide standard information useful for development of strategies for semen cryopreservation and assisted reproductive technology in this species.
    Matched MeSH terms: Spermatozoa/abnormalities; Spermatozoa/cytology*; Spermatozoa/ultrastructure*
  2. Afterword: An update on clinical utility and diagnostic value of various andrological techniques
    Durairajanayagam D, Agarwal A, Baskaran S, Vij S
    Andrologia, 2021 Mar;53(2):e13819.
    PMID: 33620116 DOI: 10.1111/and.13819
    Matched MeSH terms: Spermatozoa/metabolism
  3. Deficiency in Sperm-Egg Protein Interaction as a Major Cause of Fertilization Failure
    Sabetian S, Shamsir MS
    J. Membr. Biol., 2017 04;250(2):133-144.
    PMID: 28280854 DOI: 10.1007/s00232-017-9954-1
    Complete elucidation of fertilization process at molecular level is one of the unresolved challenges in sexual reproduction studies, and understanding the molecular mechanism is crucial in overcoming difficulties in infertility and unsuccessful in vitro fertilization. Sperm-oocyte interaction is one of the most remarkable events in fertilization process, and deficiency in protein-protein interactions which mediate this interaction is a major cause of unexplained infertility. Due to detection of how the various defects of sperm-oocyte interaction can affect fertilization failure, different experimental methods have been applied. This review summarizes the current understanding of sperm-egg interaction mechanism during fertilization and also accumulates the different types of sperm-egg interaction abnormalities and their association with infertility. Several detection approaches regarding sperm-egg protein interactions and the associated defects are reviewed in this paper.
    Matched MeSH terms: Spermatozoa/metabolism*; Spermatozoa/physiology*
  4. A preliminary study of reactive oxygen species activity within motile Boer buck sperm using confocal laser scanning microscope (CLSM)
    Fatimah IS, Iswadi IM, Khairul O, Nurhazilah M, Fadzilah MS, Padzil AR, et al.
    Clin Ter, 2010;161(2):125-8.
    PMID: 20499025
    There is an association between reactive oxygen species (ROS) and DNA damage to sperm. Researchers believe that ROS is always present at the sperm's head. The variation of ROS concentration within the area has an impact on the integrity of the DNA.
    Matched MeSH terms: Spermatozoa/metabolism*
  5. Sperm abnormalities in Droughtmaster bulls
    Bongso TA, Jainudeen MR
    Trop Anim Health Prod, 1982 Feb;14(1):58.
    PMID: 7080208
    Matched MeSH terms: Spermatozoa/abnormalities*
  6. Ovarian lavage method as an alternative route for hormonal administration and short-term sperm storage in Clarias gariepinus
    Okomoda VT, Amighty RO, Bem TM, Amaantimin J, Nurizzati I, Koh ICC, et al.
    Theriogenology, 2023 Mar 01;198:203-209.
    PMID: 36592519 DOI: 10.1016/j.theriogenology.2022.12.037
    Ovarian lavage is a term used to describe the injection of fish with a catheter through the oviduct into the ovary. In this study, the efficacy of this technique was evaluated as a route for hormone administration and sperm preservation in the African catfish Clarias gariepinus. Firstly, the effects of hormone injection routes (namely, intramuscular, intraperitoneal, and ovarian lavage) were evaluated on breeding and haematological parameters. In the second study, the fish's spermatozoa were stored in the ovaries for 1, 2, 3, and 4 days before stripping, sperm activation with freshwater, and fertilization. The breeding performance was then compared with eggs fertilized using spermatozoa refrigerated for the same duration. The study showed that the administration of synthetic hormone (ovaprim®) through the ovaries was comparable to the intramuscular route, while those injected intraperitoneally had the least values (P  0.05) the fertilization (92-93%) and hatching (81-83%) of the eggs when compared to the control (91% and 82%). Beyond this 24hr threshold, breeding performances were significantly reduced in the ovarian lavage treatments compared to those fertilized with refrigerated sperm (P 
    Matched MeSH terms: Spermatozoa/physiology
  7. Fulltext Environmental and Genetic Traffic in the Journey from Sperm to Offspring
    Sengupta P, Dutta S, Liew FF, Dhawan V, Das B, Mottola F, et al.
    Biomolecules, 2023 Dec 07;13(12).
    PMID: 38136630 DOI: 10.3390/biom13121759
    Recent advancements in the understanding of how sperm develop into offspring have shown complex interactions between environmental influences and genetic factors. The past decade, marked by a research surge, has not only highlighted the profound impact of paternal contributions on fertility and reproductive outcomes but also revolutionized our comprehension by unveiling how parental factors sculpt traits in successive generations through mechanisms that extend beyond traditional inheritance patterns. Studies have shown that offspring are more susceptible to environmental factors, especially during critical phases of growth. While these factors are broadly detrimental to health, their effects are especially acute during these periods. Moving beyond the immutable nature of the genome, the epigenetic profile of cells emerges as a dynamic architecture. This flexibility renders it susceptible to environmental disruptions. The primary objective of this review is to shed light on the diverse processes through which environmental agents affect male reproductive capacity. Additionally, it explores the consequences of paternal environmental interactions, demonstrating how interactions can reverberate in the offspring. It encompasses direct genetic changes as well as a broad spectrum of epigenetic adaptations. By consolidating current empirically supported research, it offers an exhaustive perspective on the interwoven trajectories of the environment, genetics, and epigenetics in the elaborate transition from sperm to offspring.
    Matched MeSH terms: Spermatozoa*
  8. Fulltext The more pieces, the better the puzzle: sperm concentration increases gametic compatibility
    Sherman CD, Ab Rahim ES, Olsson M, Careau V
    Ecol Evol, 2015 Oct;5(19):4354-64.
    PMID: 26664684 DOI: 10.1002/ece3.1684
    The genetic benefits individuals receive from mate choice have been the focus of numerous studies, with several showing support for both intrinsic genetic benefits and compatibility effects on fertilization success and offspring viability. However, the robustness of these effects have rarely been tested across an ecologically relevant environmental gradient. In particular, sperm environment is a crucial factor determining fertilization success in many species, especially those with external fertilization. Here, we test the importance of sperm environment in mediating compatibility-based selection on fertilization using a factorial breeding design. We detected a significant intrinsic male effect on fertilization success at only one of four sperm concentrations. Compatibility effects were significant at the two highest sperm concentrations and, interestingly, the magnitude of the compatibility effect consistently increased with sperm concentration. This suggests that females are able to modify the probability of sperm-egg fusion as the amount of sperm available increases.
    Matched MeSH terms: Spermatozoa
  9. Comparative analysis of tests used to assess sperm chromatin integrity and DNA fragmentation
    Dutta S, Henkel R, Agarwal A
    Andrologia, 2021 Mar;53(2):e13718.
    PMID: 32628294 DOI: 10.1111/and.13718
    Male infertility has a complex etiology, and many times, the cause is unknown. While routine semen analysis provides an overview of basic semen parameters, such as sperm concentration, motility, viability and morphology, a significant overlap of these parameters has been reported in fertile and infertile men. Moreover, conventional semen parameters do not reveal the cellular or molecular mechanisms of sperm dysfunctions leading to infertility. Therefore, sperm functional parameters, including sperm chromatin integrity, are evaluated to provide information on subtle sperm defects that are not routinely identified. Incomplete or defective sperm chromatin condensation increases the susceptibility of the sperm DNA to oxidative damage or other factors. To evaluate sperm chromatin integrity, different methods with varying degrees of diagnostic and prognostic capabilities are available. Among these assays, SCSA, TUNEL and SCD assays are most commonly used. While these assays rather evaluate the DNA directly for damages, the aniline blue and chromomycin A3 stains test for the quality of chromatin condensation. Thus, this review discusses and compares different methods used to evaluate sperm chromatin integrity and condensation, and their inclusion in the routine evaluation of the male infertility.
    Matched MeSH terms: Spermatozoa
  10. Kesan ekstrak akuas Lunasia amara Blanco terhadap kualiti sperma, kesuburan dan kelakuan seksual tikus jantan
    Muhamad Jafar Luthfi, Mahanem Mat Noor
    Sains Malaysiana, 2009;38.
    Sanrego (Lunasia amara Blanco) digunakan masyarakat tempatan di Indonesia sebagai bahan afrodisiak dan mampu mengatasi masalah kesuburan lelaki. Penyelidikan ini mengkaji kesan pengambilan ekstrak akuas sanrego pada dos 30, 60 dan 90 mg/kg berat badan masing-masing terhadap bilangan, motiliti dan morfologi sperma serta tahap kesuburan dan afrodisiak tikus jantan. Kumpulan kawalan diberikan air suling. Semua perlakuan diberikan secara suap-paksa sekali sehari pada pukul 10.00 pagi-11.00 pagi selama 42 hari diikuti dengan analisis sperma dan ujian tahap kesuburan. Analisis sperma menunjukkan bahawa sanrego mempunyai kesan peningkatan bilangan sperma dengan gred motiliti terbaik (gred a) dengan signifikan tanpa mempengaruhi morfologi sperma. Pengujian tahap kesuburan menunjukkan peningkatan pada kumpulan haiwan perlakuan. Jumlah bilangan pemanjatan tikus jantan dengan perlakuan sanrego juga lebih tinggi berbanding kumpulan kawalan. Kajian ini mendapati tumbuhan sanrego berpotensi meninggikan kesuburan dan mempunyai kesan afrodisiak pada haiwan jantan.
    Matched MeSH terms: Spermatozoa
  11. Kesan ekstrak akueus rosel (hibiscus sabdariffa linn.) terhadap sperma dan testis tikus diadministrasi nikotin
    Izatus Shima Taib, Siti Balkis Budin, Maizatul Nadhirah Ismail, Satirah Zainalabidin, Jamaludin Mohamed
    Sains Malaysiana, 2017;46:1611-1616.
    Penghasilan radikal bebas oleh nikotin dikaitkan dengan kerosakan sistem pembiakan lelaki terutamanya sperma dan testis. Penggunaan rawatan yang berasaskan herba seperti Hibiscus sabdariffa Linn. (HSE) kian meningkat disebabkan kandungan antioksida semula jadi yang tinggi. Oleh itu, kajian ini dijalankan untuk mengkaji kesan ekstrak akueus HSE terhadap kualiti sperma dan tekanan oksidatif testis tikus yang diadministrasi nikotin. Sejumlah 21 ekor tikus jantan Sprague-Dawley dibahagikan secara rawak kepada tiga kumpulan iaitu kumpulan kawalan, nikotin dan nikotin+HSE. Nikotin disuntik secara intraperitoneum pada dos 0.6 mg/kg berat badan manakala HSE diberikan pada dos 100 mg/kg berat badan secara paksaan oral sebelum administrasi nikotin pada setiap hari selama 21 hari berturut-turut. Hasil kajian menunjukkan bilangan, motiliti dan viabiliti sperma lebih tinggi secara signifikan (p<0.05) manakala peratus ketaknormalan morfologi sperma lebih rendah secara signifikan (p<0.05) bagi pada kumpulan nikotin+HSE berbanding kumpulan nikotin. Sementara itu berlakunya penurunan aras malondialdehid (MDA) dan peningkatan aras glutation terturun (GSH) secara signifikan (p<0.05) bagi kumpulan nikotin+HSE berbanding kumpulan nikotin. Pemerhatian histologi mendapati HSE berpotensi melindungi morfologi testis tikus aruhan nikotin. Kesimpulannya, kajian ini menunjukkan bahawa pemberian suplemen ekstrak HSE berpotensi mencegah kerosakan sperma dan testis akibat administrasi nikotin.
    Matched MeSH terms: Spermatozoa
  12. Predictor for unfavorable Johnsen scoring in non-obstructive azoospermia before intra cytoplasmic sperm insemination and its outcome
    Abu MA, Tajuddin SA, Abdul Karim AK, Ahmad MF, Mohd Razi ZR, Omar MH
    Minerva Ginecol, 2020 10;72(5):351-354.
    PMID: 32720800 DOI: 10.23736/S0026-4784.20.04573-6
    Matched MeSH terms: Spermatozoa
  13. Effects of leptin on sperm count and morphology in Sprague-Dawley rats and their reversibility following a 6-week recovery period
    Almabhouh FA, Osman K, Siti Fatimah I, Sergey G, Gnanou J, Singh HJ
    Andrologia, 2015 Sep;47(7):751-8.
    PMID: 25269426 DOI: 10.1111/and.12325
    Altered epididymal sperm count and morphology following leptin treatment has been reported recently. This study examined the effects of 42 days of leptin treatment on sperm count and morphology and their reversibility during a subsequent 56-day recovery period. Twelve-week-old male Sprague-Dawley rats were randomised into four leptin and four saline-treated control groups (n = 6). Intraperitoneal injections of leptin were given daily (60 μg Kg(-1) body weight) for 42 days. Controls received 0.1 ml of 0.9% saline. Leptin-treated animals and their respective age-matched controls were euthanised on either day 1, 21, 42 or 56 of recovery for collection of epididymal spermatozoa. Sperm concentration was determined using a Makler counting chamber. Spermatozoa were analysed for 8-hydroxy-2-deoxyguanosine and DNA fragmentation (Comet assay). Data were analysed using anova. Sperm concentration was significantly lower but fraction of abnormal spermatozoa, and levels of 8-hydroxy-2-deoxyguanosine were significantly higher in leptin-treated rats on day 1 of recovery. Comet assays revealed significant DNA fragmentation in leptin-treated rats. These differences were reduced by day 56 of recovery. It appears that 42 days of leptin treatment to Sprague-Dawley rats has significant adverse effects on sperm count and morphology that reverse following discontinuation of leptin treatment.
    Matched MeSH terms: Spermatozoa/drug effects*
  14. Bovine serum albumin: survival and osmolarity effect in bovine spermatozoa stored above freezing point
    Nang CF, Osman K, Budin SB, Ismail MI, Jaffar FH, Mohamad SF, et al.
    Andrologia, 2012 May;44 Suppl 1:447-53.
    PMID: 21806660 DOI: 10.1111/j.1439-0272.2011.01203.x
    Liquid nitrogen preservation in remote farms is a limitation. The goal of this study was to determine optimum temperature above freezing point for bovine spermatozoa preservation using bovine serum albumin (BSA) as a supplementation. Pooled semen sample from three ejaculates was subjected to various BSA concentration (1, 4, 8 and 12 mg ml(-1)), before incubation in different above freezing point temperatures (4, 25 and 37 °C). Viability assessment was carried out against time from day 0 (fresh sample) until all spermatozoa become nonviable. Optimal condition for bovine spermatozoa storage was at 4 °C with 1 mg ml(-1) BSA for almost 7 days. BSA improved bovine spermatozoa viability declining rate to 44.28% at day 4 and 57.59% at day 7 compared to control, with 80.54% and 98.57% at day 4 and 7 respectively. Increase in BSA concentration did not improve sperm viability. Our results also confirmed that there was a strong negative correlation between media osmolarity and bovine spermatozoa survival rate with r = 0.885, P < 0.0001. Bovine serum albumin helps to improve survival rate of bovine spermatozoa stored above freezing point.
    Matched MeSH terms: Spermatozoa*
  15. The effects of magnetic separation on cryopreserved bovine spermatozoa motility, viability and cryo-capacitation status
    Faezah SS, Zuraina FM, Farah JH, Khairul O, Hilwani NI, Iswadi MI, et al.
    Zygote, 2014 Aug;22(3):378-86.
    PMID: 23237064 DOI: 10.1017/S0967199412000597
    Cryopreservation is a technique used to preserve cells for long-time storage. It is widely used in agriculture to store male gametes in liquid nitrogen. The aim of this study was to determine the optimum thawing temperature and time for samples subjected to annexin V magnetic-activated cell sorting (AnMACS) as the sperm preparation technique. Pooled semen samples from three ejaculates were divided into two groups. The treatment group was subjected both to AnMACS and to being cryopreserved, whilst the control group was cryopreserved directly without MACS. Post-thaw analysis was carried out for samples thawed at either 20°C for 13 s, 37°C for 30 s, 40°C for 7 s, 60°C for 6 s or 80°C for 5 s. Sperm kinematics, viability and capacitation status were determined for samples subjected to all thawing temperatures described. Results showed that thawing at 37°C for 13 s for MACS-processed samples was a superior option compared with other thawing procedures; there was a significant difference in P < 0.05 values for curvilinear velocity (VCL μm/s) and sperm straightness (STR %) when samples were thawed at 40°C for 7 s, with fewer capacitated spermatozoa (P < 0.05) when samples were thawed at 37°C for 30 s, 40°C for 7 s or 60°C for 6 s. Hence, we can speculate that the use of AnMACS as the sperm preparation technique can somehow enhance sperm cryosurvival rate after cryopreservation, however the fertilization potential of these cells has yet to be determined.
    Matched MeSH terms: Spermatozoa/physiology*
  16. The use of the semen analysis in predicting fertility outcome
    Arumugam K, Omar SZ
    Aust N Z J Obstet Gynaecol, 1992 May;32(2):154-7.
    PMID: 1520202
    The study investigates the use of the various parameters of the semen analysis in predicting the fertility outcome in 82 infertile couples. The sperm density, % progressive motility, % normal morphology were divided into 'normal' and 'abnormal' based on the criteria proposed by WHO. The subsequent cumulative pregnancy rates were then calculated according to this criteria. A life-table method of analysis was used. All female related fertility factors were excluded. With the exception of a sperm density of less than 20 x 10(6) per ml the other parameters showed no significant correlation with the cumulative pregnancy rates at 12 months or 24 months respectively. We concluded that the semen analysis does not predict the probable outcome of the subsequent rates even when female fertility related factors were excluded apart from a sperm density less than 20 x 10(6) per ml.
    Matched MeSH terms: Spermatozoa/cytology
  17. Ultrastructural observations on the merocyst and gametocytes of Hepatocystis spp. from Malaysian squirrels
    Canning EU, Sinden RE, Landau I, Miltgen F
    Ann Parasitol Hum Comp, 1976 11 1;51(6):607-23.
    PMID: 829210
    An immature merocyst of Hepatocystis malayensis and gametocytes of H. brayi were studied with the electron microscope. The merocyst consisted of a highly complex cytoplasmic reticulum ramifying through an amorphous matrix: the entire complex was enclosed by a simple unit membrane. The host cell was apparently destroyed completely during growth of the cyst. Immature gametocytes were highly amoeboid and showed extensive vacuolisation or attenuation of the cytoplasm. The nucleus contained one or two prominent nucleoli. Mature gametocytes had compact cytoplasm and contained pyriform osmiophilic bodies which were believed to function in the release of the parasites from the host cells. Macrogametocytes were distinguished from microgametocytes by cytoplasmic differences in numbers of ribosomes, and cristate mitochondria and in the extent of development of the smooth endoplasmic reticulum. The compact nuclei of the macrogametocytes had inconspicuous DNA but prominent nucleoli whereas those of the microgametocytes were irregular and showed a central aggregate of DNA. In microgametogenesis karyokinesis of the parent nucleus was delayed until axoneme formation was complete. Then the nuclear buds were extruded into emerging microgametes. At fertilisation the plasmalemmas of the two gametes fused and the single axoneme and nucleus of the microgamete moved into the cytoplasm of the macrogamete.
    Matched MeSH terms: Spermatozoa/ultrastructure
  18. Causes and consequences of sperm mitochondrial dysfunction
    Durairajanayagam D, Singh D, Agarwal A, Henkel R
    Andrologia, 2021 Feb;53(1):e13666.
    PMID: 32510691 DOI: 10.1111/and.13666
    Mitochondria have multiple functions, including synthesis of adenine triphosphate, production of reactive oxygen species, calcium signalling, thermogenesis and apoptosis. Mitochondria have a significant contribution in regulating the various physiological aspects of reproductive function, from spermatogenesis up to fertilisation. Mitochondrial functionality and intact mitochondrial membrane potential are a pre-requisite for sperm motility, hyperactivation, capacitation, acrosin activity, acrosome reaction and DNA integrity. Optimal mitochondrial activity is therefore crucial for human sperm function and semen quality. However, the precise role of mitochondria in spermatozoa remains to be fully explored. Defects in sperm mitochondrial function severely impair the maintenance of energy production required for sperm motility and may be an underlying cause of asthenozoospermia. Sperm mtDNA is susceptible to oxidative damage and mutations that could compromise sperm function leading to infertility. Males with abnormal semen parameters have increased mtDNA copy number and reduced mtDNA integrity. This review discusses the role of mitochondria in sperm function, along with the causes and impact of its dysfunction on male fertility. Greater understanding of sperm mitochondrial function and its correlation with sperm quality could provide further insights into their contribution in the assessment of the infertile male.
    Matched MeSH terms: Spermatozoa/metabolism
  19. Decline in sperm count in European men during the past 50 years
    Sengupta P, Borges E, Dutta S, Krajewska-Kulak E
    Hum Exp Toxicol, 2018 Mar;37(3):247-255.
    PMID: 28413887 DOI: 10.1177/0960327117703690
    PURPOSE: To investigate whether the sperm concentration of European men is deteriorating over the past 50 years of time.

    MATERIALS AND METHODS: We analysed the data published in English language articles in the past 50 years in altering sperm concentration in European men.

    RESULTS: A time-dependent decline of sperm concentration ( r = -0.307, p = 0.02) in the last 50 years and an overall 32.5% decrease in mean sperm concentration was noted.

    CONCLUSION: This comprehensive, evidence-based meta-analysis concisely presents the evidence of decreased sperm concentration in European male over the past 50 years to serve the scientific research zone related to male reproductive health.

    Matched MeSH terms: Spermatozoa/physiology*
  20. Observations on delayed mating and post-coital impotence of spermatozoa in Aedes albopitus (Skuse) (Diptera : Culicidae)
    Chellappah WT
    Med J Malaysia, 1964 Sep;19:60-1.
    PMID: 14244223
    Matched MeSH terms: Spermatozoa*
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