The relationship between membrane status and fertility of boar spermatozoa after flow cytometric sorting in the presence or absence of seminal plasma

1998 ◽  
Vol 10 (5) ◽  
pp. 433 ◽  
Author(s):  
W. M. C. Maxwell ◽  
C. R. Long ◽  
L. A. Johnson ◽  
J. R. Dobrinsky ◽  
G. R. Welch
Keyword(s):  
Seminal Plasma ◽  
Hoechst 33342 ◽  
Cell Sorter ◽  
Vitro Fertilization ◽  
Flow Cytometric ◽  
Collection Medium ◽  
Flow Cytometric Sorting ◽  
Boar Spermatozoa ◽  
The Relationship

The motility, viability (percent live), capacitation status and in vitro fertility of boar spermatozoa were examined, after staining with Hoechst 33342 and flow cytometric sorting in the absence or presence of seminal plasma. Viability was higher in unstained controls and when seminal plasma was present in the medium used to collect spermatozoa from the cell sorter than when seminal plasma was absent or in the staining extender only, but motility was highest when seminal plasma was included in the extender only, compared with the controls and other treatments. The proportions of capacitated spermatozoa were increased by sorting, but were lower when seminal plasma was present, rather than absent, from the staining extender and the collection medium. Compared with unstained controls, extension and staining without sorting only increased the proportion of capacitated spermatozoa after washing in preparation for in vitro fertilization. The percentages of polyspermic, penetrated and cleaved oocytes were lower when inseminated with unsorted (stained) than control (unstained) spermatozoa, regardless of the presence or absence of seminal plasma. These parameters were higher for sorted than for control spermatozoa in the absence of seminal plasma, but in its presence penetration and cleavage were substantially lower. The proportions of capacitated spermatozoa were lower when seminal plasma was present in the collection medium only than in the staining extender or when it was absent altogether, but the former treatment substantially reduced the proportions of polyspermic, penetrated and cleaved oocytes, and the proportion of blastocysts. These findings indicate that sperm capacitation associated with flow cytometric sorting can be reduced by the inclusion of seminal plasma in the collection medium, but this treatment reduces the ability of spermatozoa to fertilize oocytes in vitro under these conditions.

Viability and membrane integrity of spermatozoa after dilution and flow cytometric sorting in the presence or absence of seminal plasma

1996 ◽  
Vol 8 (8) ◽  
pp. 1165 ◽  
Author(s):  
WM Maxwell ◽  
GR Welch ◽  
LA Johnson
Keyword(s):  
Seminal Plasma ◽  
Membrane Integrity ◽  
Fluorescein Isothiocyanate ◽  
Holding Period ◽  
Flow Cytometric ◽  
Collection Medium ◽  
Empty Tube ◽  
Flow Cytometric Sorting ◽  
Nucleic Acid Stain

Boar, bull and ram spermatozoa were examined after staining with the DNA-permeant Hoechst 33342 fluorochrome and flow cytometric sorting in the presence or absence of seminal plasma. Spermatozoa were assessed for viability with flow cytometry using the live cell nucleic acid stain SYBR-14 and propidium iodide (PI), and for membrane integrity using fluorescein isothiocyanate-conjugated Pisum sativum (FITC-PSA) and PI; motility and acrosome integrity were estimated by microscopy. Flow cytometric sorting was compared with pipette dilution of boar and bull spermatozoa into: (1) medium [boar: Test buffer containing 2% yolk (TY) or Beltsville thawing solution (BTS); bull: TY or HEPES buffer containing 0.1% bovine serum albumin (HEPES-BSA)] with or without 10% (v/v) seminal plasma; or (2) an empty tube containing no medium. Sorted spermatozoa were either not centrifuged or centrifuged before assessment during a 4-h holding period. The viability, motility and membrane integrity of boar, bull and ram spermatozoa centrifuged after sorting were also examined when seminal plasma was present or absent from the staining extender and/or the TY collection medium. The results indicate that the viability and membrane integrity of spermatozoa in vitro would be improved if: (1) seminal plasma (10%) was routinely included in the BTS and HEPES-BSA staining extenders for boar spermatozoa and ram spermatozoa, respectively, when used in preparation for flow cytometric sorting; and (2) 10% and 50% seminal plasma were included in the TY collection medium for boar or bull spermatozoa and ram spermatozoa respectively.

scholarly journals 309 SEX SORTED BOAR SPERMATOZOA: TIME COURSE AND PROFILE OF THEIR IN VITRO PENETRATION ABILITY AFTER STORAGE IN THE PRESENCE OF HOMOLOGOUS SEMINAL PLASMA

2005 ◽  
Vol 17 (2) ◽  
pp. 305
Author(s):  
I. Parrilla ◽  
J.M. Vazquez ◽  
M.A. Gil ◽  
I. Caballero ◽  
C. Almiñana ◽  
...  
Keyword(s):  
Seminal Plasma ◽  
Time Course ◽  
Egg Yolk ◽  
Vitro Fertilization ◽  
Penetration Ability ◽  
And Control ◽  
Pig Oocyte ◽  
Boar Spermatozoa ◽  
Penetration Time

Addition of seminal plasma (SP) to the collection medium has been shown to be beneficial for motility and viability of sex-sorted and stored spermatozoa. However, SP could not only delay but also decrease the in vitro fertilization rates of IVM pig oocytes. In the present study, the time-course of IVM pig oocyte penetration of sex sorted boar spermatozoa stored in the presence or absence of SP was evaluated. Spermatozoa were sex-sorted following the Beltsville sperm sexing technology (Johnson and Welch 1999 Theriogenology 52, 1323–1342) and collected in TEST-egg yolk buffer (2%) with (10%) or without (control) SP. Sex-sorted spermatozoa were stored at 20°C during 0, 2, 5, and 10 h after sorting. Oocytes were matured in vitro in NCSU23 (Peters and Wells 1663 J. Reprod. Fertil. 48, 61–73) for 44 h in 5% CO2 in air at 39°C. The in vitro penetration time-course was determined by co-incubating the sex-sorted and stored spermatozoa with IVM oocytes during 3, 6, and 18 h in modified TRIS-buffered medium (mTBM) (Abeydeera and Day 1997 Theriogenology 48, 537–544) at 39°C in an atmosphere of 5% CO2 in air. Penetration rates and number of spermatozoa per oocyte were assessed after fixation and staining of the oocytes. Statistical analyses were conducted by ANOVA. Presence of SP did not delay the onset of the oocyte penetration. Moreover, at 3 h of co-incubation, SP increased (P < 0.05) both penetration rates and mean number of spermatozoa per oocyte in sorted and stored boar spermatozoa when compared with control (45 vs. 20, 50 vs. 32, 38 vs. 23, 15 vs. 8, at 0, 2, 5, and 10 h of storage with SP and control, respectively). High penetration rates were reached after 6 h of co-incubation (82 vs. 51, 96 vs. 76, 83 vs. 48, 31 vs. 24, at 0, 2, 5, and 10 h of storage with SP and control, respectively) in sorted and stored samples, with no further increase at 18 h (70 vs. 63, 92 vs. 79, 87 vs. 53, 55 vs. 40, at 0, 2, 5, and 10 h of storage with SP and control, respectively). Spermatozoa stored 2 h in the presence of SP showed the best penetration rate and highest mean number of spermatozoa per oocyte. The mean number of spermatozoa per oocyte increased as the co-incubation time increased (ranging from 2.1 to 5.8 for sorted spermatozoa stored 2 h in the presence of SP at 3 h and 18 h of co-incubation, respectively). In conclusion, the presence of SP during the storage of sex-sorted spermatozoa improves their in vitro fertilizing ability without affecting the onset of the oocyte penetration time. This work was supported by DGICYT (AGL 2001-0471), Fundación Seneca (PB174/FS/02) and CTIC (2103SIU0040).

Sex preselection by flow cytometric separation of X and Y chromosome-bearing sperm based on DNA difference: a review

1995 ◽  
Vol 7 (4) ◽  
pp. 893 ◽  
Author(s):  
LA Johnson
Keyword(s):  
Y Chromosome ◽  
Sex Chromosome ◽  
Human Sperm ◽  
Specific Marker ◽  
Current Form ◽  
Vitro Fertilization ◽  
Flow Cytometric ◽  
Flow Cytometric Sorting

Recent research on the flow cytometry of sperm for the purpose of predetermining gender of offspring has led to a validated method to separate X from Y chromosome-bearing sperm for use with in vitro fertilization and embryo transfer, intratubal insemination or intracytoplasmic sperm injection. The basis for the method is the sex chromosome-specific marker, DNA, which is present in greater amounts in X-bearing sperm than in Y-bearing sperm of mammals. Sperm are exposed to the vital dye Hoechst 33342 which binds to the minor groove of the DNA helix. Flow cytometric sorting of the sperm using a laser as the excitation source results in populations of Y- or X-bearing sperm that are 85-90% pure. Several hundred offspring have been produced from swine, rabbits, sheep and cattle that confirm the predicted sex. The method is currently being applied to the commercial embryo market. The method is not likely to be used in conjunction with standard cattle or swine artificial insemination practice in its current form since only about 4 x 10(5) sorted sperm can be produced per hour of sorting. The technology has also been applied to human sperm for use by couples that are at risk to sex-linked disease expression in their offspring. Populations of human sperm have been sorted with X and Y purities of about 80% as confirmed by DNA probe technology and fluorescence in situ hybridization.

Thickness of endometrium: predictor of the effectiveness of IVF/ICSI programs (literature review)

GYNECOLOGY ◽  
2018 ◽  
Vol 20 (1) ◽  
pp. 113-116
Author(s):  
L A Bagdasaryan ◽  
I E Korneyeva
Keyword(s):  
Assisted Reproductive Technologies ◽  
Endometrial Thickness ◽  
Molecular Genetic ◽  
Uterine Cavity ◽  
Reproductive Technologies ◽  
Genetic Characteristics ◽  
Vitro Fertilization ◽  
Need To Evaluate ◽  
The Relationship

The aim of the study is to systematically analyze the data available in the modern literature on the relationship between endometrial thickness and the frequency of pregnancy in the program of assisted reproductive technologies (ART). Materials and methods. The review includes data from foreign and domestic articles found in PubMed on this topic. Results. The article presents data on the relationship between the thickness of the endometrium and the frequency of pregnancy in ART programs. The greatest number of studies is devoted to the evaluation of the relationship between the thickness of the endometrium and the frequency of pregnancy on the day of the ovulation trigger. Data are presented on the existence of a correlation between the thickness of the endometrium measured on the day of the ovulation trigger and the frequency of clinical pregnancy, as well as data on the need to evaluate the structure of the endometrium and the state of subendometric blood flow. The importance of multilayered (three-layered) endometrium as a prognostic marker of success in in vitro fertilization/intracytoplasmic sperm injection programs in the ovum is emphasized. The conclusion. The thickness of the endometrium can not be used as an argument for canceling the cycle or abolishing embryo transfer to the uterine cavity. Further studies in this direction are needed with a study of the morphological and molecular genetic characteristics of the endometrium, which in the future will allow us to evaluate the relationship between the thickness of the endometrium and the probability of pregnancy.

scholarly journals Seminal Plasma: Relevant for Fertility?

2021 ◽  
Vol 22 (9) ◽  
pp. 4368
Author(s):  
Heriberto Rodriguez-Martinez ◽  
Emilio A. Martinez ◽  
Juan J. Calvete ◽  
Fernando J. Peña Vega ◽  
Jordi Roca
Keyword(s):  
Seminal Plasma ◽  
Current Knowledge ◽  
Inorganic Ions ◽  
Vitro Fertilization ◽  
Dna And Rna ◽  
Model Animal ◽  
Sexual Glands ◽  
Species Specific

Seminal plasma (SP), the non-cellular component of semen, is a heterogeneous composite fluid built by secretions of the testis, the epididymis and the accessory sexual glands. Its composition, despite species-specific anatomical peculiarities, consistently contains inorganic ions, specific hormones, proteins and peptides, including cytokines and enzymes, cholesterol, DNA and RNA—the latter often protected within epididymis- or prostate-derived extracellular vesicles. It is beyond question that the SP participates in diverse aspects of sperm function pre-fertilization events. The SP also interacts with the various compartments of the tubular genital tract, triggering changes in gene function that prepares for an eventual successful pregnancy; thus, it ultimately modulates fertility. Despite these concepts, it is imperative to remember that SP-free spermatozoa (epididymal or washed ejaculated) are still fertile, so this review shall focus on the differences between the in vivo roles of the SP following semen deposition in the female and those regarding additions of SP on spermatozoa handled for artificial reproduction, including cryopreservation, from artificial insemination to in vitro fertilization. This review attempts, including our own results on model animal species, to critically summarize the current knowledge of the reproductive roles played by SP components, particularly in our own species, which is increasingly affected by infertility. The ultimate goal is to reconcile the delicate balance between the SP molecular concentration and their concerted effects after temporal exposure in vivo. We aim to appraise the functions of the SP components, their relevance as diagnostic biomarkers and their value as eventual additives to refine reproductive strategies, including biotechnologies, in livestock models and humans.

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