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Vidoman M, Kalis V, Smazinka M, Havir M, Rusavy Z, Ismail KM. Pilsner Modification of Mesh Sacrohysterocolpopexy (PiMMS): An Initial Report on Safety and Efficacy. Int Urogynecol J 2024:10.1007/s00192-024-05780-w. [PMID: 38691124 DOI: 10.1007/s00192-024-05780-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 03/04/2024] [Indexed: 05/03/2024]
Abstract
INTRODUCTION AND HYPOTHESIS It is reported that up to 60% of women would prefer to spare their uterus during pelvic organ prolapse (POP) repair surgery. A reliable hysteropexy technique is therefore crucial. We aimed to describe the safety profile and initial core patient-reported and clinical outcomes of the Pilsner modification of laparoscopic mesh sacrohysterocolpopexy (PiMMS) in comparison with the laparoscopic sacrohysterocolpopexy technique (standard laparoscopic sacrohysterocolpopexy [sLSH]) previously used in our unit. METHODS This was a retrospective cohort study conducted in a single tertiary referral urogynecological center. All patients who underwent laparoscopic mesh sacrohysterocolpopexy between 1 January 2015, and 31 January 2022 were included in the study. Follow-up clinical, patient-reported, and imaging outcomes at the 12-month follow-up time point are presented. RESULTS A total of 87 patients were included. Of these, 49 (56.3%) and 38 (43.7%) underwent sLSH and PiMMS respectively. Low numbers of perioperative complications were found in both groups with no mesh-related complications reported following PiMMS up to 12 months postoperatively. There were no apical compartment failures in either group. There were 8 (17.0%) vs 1 (2.7%) anterior compartment failures (Ba ≤ -1) in the sLSH and PiMMS groups respectively (p = 0.07) at 12 months. At the 1-year follow-up, 42 (89.4%) patients reported a Patient Global Impression of Improvement score of ≤ 2 in the sLSH groups compared with 35 (94.6%) patients following PiMMS. CONCLUSIONS The PiMMS technique seems to have comparable safety profile and patient-reported outcomes with the sLSH technique. However, there is a trend toward reduced anterior compartment failures with this modification. The findings of this preliminary report need to be re-evaluated in a well-powered prospective study.
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Affiliation(s)
- Matej Vidoman
- Department of Gynecology and Obstetrics, Faculty Hospital, Trenčín, Slovakia
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia
| | - Vladimir Kalis
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia
- Department of Gynecology and Obstetrics, University Hospital, Pilsen, Czechia
- Center for Pelvic-Floor Disorders, Pilsen, Czechia
| | - Martin Smazinka
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia
- Department of Gynecology and Obstetrics, University Hospital, Pilsen, Czechia
- Center for Pelvic-Floor Disorders, Pilsen, Czechia
| | - Martin Havir
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia
- Department of Gynecology and Obstetrics, University Hospital, Pilsen, Czechia
- Center for Pelvic-Floor Disorders, Pilsen, Czechia
| | - Zdenek Rusavy
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia
- Department of Gynecology and Obstetrics, University Hospital, Pilsen, Czechia
- Center for Pelvic-Floor Disorders, Pilsen, Czechia
| | - Khaled M Ismail
- Department of Gynecology and Obstetrics, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 76, 304 60, Pilsen, Czechia.
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, Staré Město, Czechia.
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Demel I, Skopal D, Šafránková E, Rozsívalová P, Jindra P, Šrámek J, Turková A, Vydra J, Labská K, Vedrová J, Čerňan M, Szotkowski T, Móciková H, Hynková L, Šušol O, Kováčová I, Belada D, Hájek R. Effectiveness of tixagevimab/cilgavimab in patients with hematological malignancies as a pre-exposure prophylaxis to prevent severe COVID-19: a Czech retrospective multicenter study. Ann Hematol 2024; 103:981-992. [PMID: 38092996 PMCID: PMC10866774 DOI: 10.1007/s00277-023-05572-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 11/28/2023] [Indexed: 02/15/2024]
Abstract
Despite lower virulence, the omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that causes coronavirus disease 2019 (COVID-19) still poses a relevant threat for immunocompromised patients. A retrospective multicentric study was conducted to evaluate the efficacy of pre-exposure prophylaxis with tixagevimab/cilgavimab (Evusheld) with a 6-month follow-up for preventing severe COVID-19 in adult patients with hematology malignancy. Among the 606 patients in the cohort, 96 (16%) contracted COVID-19 with a median of 98.5 days after Evusheld administration. A total of 75% of patients had asymptomatic or mild severity of COVID-19, while just 25% of patients with SARS-CoV-2 positivity had to be hospitalized. Two patients (2%) died directly, and one patient (1%) in association with COVID-19. Eight patients (1.3%) of every cohort experienced adverse events related to Evusheld, mostly grade 1 and of reversible character. It was found that complete vaccination status or positive seroconversion was not associated with lower risk of COVID-19 infection. Previous treatment with an anti-CD20 monoclonal antibody was associated with higher rates of COVID-19, while previous treatment with anti-CD38 monoclonal antibody was not, as was the case for recipients of hematopoietic stem cell transplantation or CAR-T cell therapy. Presence of other comorbidities was not associated with more severe COVID-19. The results support the growing evidence for Evusheld's efficacy against severe COVID-19 in patients with hematology malignancies.
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Affiliation(s)
- Ivo Demel
- Department of Haematooncology, University Hospital Ostrava, 17. Listopadu 1790/5, 708 52, Ostrava, Czech Republic.
- Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic.
| | - David Skopal
- 4th Department of Internal Medicine - Haematology, Hospital and Faculty of Medicine, Charles University, Hradec Kralove, Czech Republic
| | - Eliška Šafránková
- 4th Department of Internal Medicine - Haematology, Hospital and Faculty of Medicine, Charles University, Hradec Kralove, Czech Republic
| | - Petra Rozsívalová
- Hospital Pharmacy, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- Department of Social and Clinical Pharmacy, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Pavel Jindra
- Department of Haematology & Oncology, University Hospital Pilsen, Pilsen, Czech Republic
| | - Jiří Šrámek
- Department of Haematology & Oncology, University Hospital Pilsen, Pilsen, Czech Republic
- Department of Histology and Embryology, Faculty of Medicine, Pilsen, Czech Republic
| | - Adéla Turková
- Department of Haematology & Oncology, University Hospital Pilsen, Pilsen, Czech Republic
| | - Jan Vydra
- Institute of Haematology and Blood Transfusion, Prague, Czech Republic
| | - Klára Labská
- Institute of Haematology and Blood Transfusion, Prague, Czech Republic
| | - Jana Vedrová
- Institute of Haematology and Blood Transfusion, Prague, Czech Republic
| | - Martin Čerňan
- Department of Haemato-Oncology, Faculty of Medicine and Dentistry, Palacky University and University Hospital Olomouc, Olomouc, Czech Republic
| | - Tomáš Szotkowski
- Department of Haemato-Oncology, Faculty of Medicine and Dentistry, Palacky University and University Hospital Olomouc, Olomouc, Czech Republic
| | - Heidi Móciková
- Department of Internal Medicine and Haematology, Faculty Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Lenka Hynková
- Department of Internal Medicine and Haematology, Faculty Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Ondrej Šušol
- Department of Haematooncology, University Hospital Ostrava, 17. Listopadu 1790/5, 708 52, Ostrava, Czech Republic
- Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
| | - Ingrid Kováčová
- Department of Haematooncology, University Hospital Ostrava, 17. Listopadu 1790/5, 708 52, Ostrava, Czech Republic
| | - David Belada
- 4th Department of Internal Medicine - Haematology, Hospital and Faculty of Medicine, Charles University, Hradec Kralove, Czech Republic
| | - Roman Hájek
- Department of Haematooncology, University Hospital Ostrava, 17. Listopadu 1790/5, 708 52, Ostrava, Czech Republic
- Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
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Kendall Bártů M, Němejcová K, Michálková R, Stružinská I, Hájková N, Hojný J, Krkavcová E, Laco J, Matěj R, Drozenová J, Méhes G, Fabian P, Hausnerová J, Švajdler M, Škapa P, Cibula D, Zima T, Dundr P. HER2 status as a potential predictive biomarker for ovarian clear cell carcinoma. Virchows Arch 2023; 483:497-507. [PMID: 37676270 DOI: 10.1007/s00428-023-03640-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/21/2023] [Accepted: 08/30/2023] [Indexed: 09/08/2023]
Abstract
Ovarian clear cell carcinoma (OCCC) is a subtype of ovarian carcinoma characterized by unique biological features and highly malignant characteristics including low chemosensitivity. Therefore, new therapeutic targets are needed. These could include the downstream pathways of receptor tyrosine kinases, especially the human epidermal growth factor receptor 2 (HER2). Our main objective was to characterize the HER2 status using immunohistochemistry (IHC) and FISH on 118 OCCCs, also considering the novel paradigm of HER2-zero and HER2-low status. Other aims included determination of the association between HER2 status and survival, HER2 gene DNA and RNA NGS analysis, HER2 gene expression analysis, and correlation between IHC and gene expression in HER2-zero and HER2-low cases. Cases with HER2 overexpression/amplification accounted for 5.1% (6/118), with additional 3% harbouring HER2 gene mutation. The remaining 112 (94.9%) cases were HER2-negative. Of these, 75% were classified as HER2-zero and 25% as HER2-low. This percentage of HER2 aberrations is significant concerning their possible therapeutic influence. Cases from the HER2-zero group showed significantly better survival. Although this relationship lost statistical significance in multivariate analysis, the results have potential therapeutic significance. HER2 gene expression analysis showed a significant correlation with HER2 IHC status in the entire cohort (HER2-positive vs. HER2-negative), while in the cohort of only HER2-negative cases, the results did not reach statistical significance, suggesting that gene expression analysis would not be suitable to confirm the subdivision into HER2-low and HER2-zero. Our results also emphasize the need for standardized HER2 testing in OCCC to determine the best predictor of clinical response.
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Affiliation(s)
- Michaela Kendall Bártů
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic.
| | - Kristýna Němejcová
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Romana Michálková
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Ivana Stružinská
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Nikola Hájková
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Jan Hojný
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Eva Krkavcová
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
| | - Jan Laco
- The Fingerland Department of Pathology, Charles University, Faculty of Medicine Hradec Králové and University Hospital Hradec Králové, Hradec Králové, Czech Republic
| | - Radoslav Matěj
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
- Department of Pathology, 3rd Faculty of Medicine, Charles University, University Hospital Kralovske Vinohrady, 10034, Prague, Czech Republic
- Department of Pathology and Molecular Medicine, Third Faculty of Medicine, Charles University, Thomayer University Hospital, Prague, Czech Republic
| | - Jana Drozenová
- Department of Pathology, 3rd Faculty of Medicine, Charles University, University Hospital Kralovske Vinohrady, 10034, Prague, Czech Republic
| | - Gábor Méhes
- Department of Pathology, Faculty of Medicine, University of Debrecen, 4032, Debrecen, Hungary
| | - Pavel Fabian
- Department of Oncological Pathology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jitka Hausnerová
- Department of Pathology, University Hospital Brno and Medical Faculty, Masaryk University, Brno, Czech Republic
| | - Marián Švajdler
- Šikl's Department of Pathology, The Faculty of Medicine and Faculty Hospital in Pilsen, Charles University, Pilsen, Czech Republic
| | - Petr Škapa
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic
| | - David Cibula
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Tomáš Zima
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Pavel Dundr
- Department of Pathology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Studničkova 2, 12800 Prague 2, Prague, Czech Republic
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Horcicka L, Krcmar M, Nemec M, Hympanova L, Feyereisl J, Krofta L. Appearance of levator ani muscle subdivision defects on level III vaginal support structures in women with and without pelvic organ prolapse: an MRI study. Int Urogynecol J 2023; 34:1971-1982. [PMID: 37119270 PMCID: PMC10415508 DOI: 10.1007/s00192-023-05533-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 03/09/2023] [Indexed: 05/01/2023]
Abstract
INTRODUCTION AND HYPOTHESIS Injury of the levator ani muscle (LAM) is a significant risk factor for pelvic organ prolapse (POP). The puborectalis (PRM) and pubovisceral (PVM) subdivisions are level III vaginal support structures. The null hypothesis was that there is no significant difference in patterns of LAM subdivisions in healthy nulliparous women. Secondarily, we evaluated the presence of different LAM injury in a POP-symptomatic cohort. METHODS This retrospective magnetic resonance imaging study included: 64 nulligravidae without any pelvic floor dysfunction (PFD) and 526 women of various parity with symptomatic POP. Primary outcome was PVM and PRM morphology on the axial planes: the attachment site on the pubic bone, and the visible separation/border between the PVM and PRM. The attachment was scored as "normal" or "abnormal". The "abnormal" attachment was divided in two types: "type I"-loss of the muscle substance, but preservation of the overall muscle architecture-and "type II"-muscle detachment from the pubic bone. RESULTS The puboanal muscle (PAM) subdivision was evaluated as a representative part of the PVM. The PAM and PRM attachments and separation were distinguished in all asymptomatic nulliparae. PAM and PRM attachments did not significantly differ. POP group characteristics were parity 1.9 ± 0.8, instrumental delivery 5.6%, hysterectomy or POP surgery 60%, all Pelvic Organ Prolapse Quantification (POP-Q) stages, LAM defect 77.6% (PRM: 77.1%; PAM: 51.3%). Type I injuries were more frequent (PRM 54.7%; PAM 53.9%) compared with type II (PRM 29.4%; PAM 42.1%). CONCLUSIONS A LAM defect was present in 77.6% of women with symptomatic POP. In PRM and PAM subdivisions type I injury was more frequent than type II.
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Affiliation(s)
- L Horcicka
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic
| | - M Krcmar
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic
- Institute for the Care of Mother and Child, Podolské nábřeží 157, 147 00, Prague, Czech Republic
| | - M Nemec
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic
| | - L Hympanova
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic.
- Institute for the Care of Mother and Child, Podolské nábřeží 157, 147 00, Prague, Czech Republic.
| | - J Feyereisl
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic
- Institute for the Care of Mother and Child, Podolské nábřeží 157, 147 00, Prague, Czech Republic
| | - L Krofta
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00, Prague, Czech Republic
- Institute for the Care of Mother and Child, Podolské nábřeží 157, 147 00, Prague, Czech Republic
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Skopkova M, Stufkova H, Rambani V, Stranecky V, Brennerova K, Kolnikova M, Pietrzykova M, Karhanek M, Noskova L, Tesarova M, Hansikova H, Gasperikova D. ATAD3A-related pontocerebellar hypoplasia: new patients and insights into phenotypic variability. Orphanet J Rare Dis 2023; 18:92. [PMID: 37095554 PMCID: PMC10127305 DOI: 10.1186/s13023-023-02689-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 04/02/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Pathogenic variants in the ATAD3A gene lead to a heterogenous clinical picture and severity ranging from recessive neonatal-lethal pontocerebellar hypoplasia through milder dominant Harel-Yoon syndrome up to, again, neonatal-lethal but dominant cardiomyopathy. The genetic diagnostics of ATAD3A-related disorders is also challenging due to three paralogous genes in the ATAD3 locus, making it a difficult target for both sequencing and CNV analyses. RESULTS Here we report four individuals from two families with compound heterozygous p.Leu77Val and exon 3-4 deletion in the ATAD3A gene. One of these patients was characterized as having combined OXPHOS deficiency based on decreased complex IV activities, decreased complex IV, I, and V holoenzyme content, as well as decreased levels of COX2 and ATP5A subunits and decreased rate of mitochondrial proteosynthesis. All four reported patients shared a strikingly similar clinical picture to a previously reported patient with the p.Leu77Val variant in combination with a null allele. They presented with a less severe course of the disease and a longer lifespan than in the case of biallelic loss-of-function variants. This consistency of the phenotype in otherwise clinically heterogenous disorder led us to the hypothesis that the severity of the phenotype could depend on the severity of variant impact. To follow this rationale, we reviewed the published cases and sorted the recessive variants according to their impact predicted by their type and the severity of the disease in the patients. CONCLUSION The clinical picture and severity of ATAD3A-related disorders are homogenous in patients sharing the same combinations of variants. This knowledge enables deduction of variant impact severity based on known cases and allows more accurate prognosis estimation, as well as a better understanding of the ATAD3A function.
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Affiliation(s)
- Martina Skopkova
- Department of Metabolic Disorders, Institute of Experimental Endocrinology, Biomedical Research Center SAS, Bratislava, Slovakia
| | - Hana Stufkova
- Laboratory for Study of Mitochondrial Disorders, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Vibhuti Rambani
- Department of Metabolic Disorders, Institute of Experimental Endocrinology, Biomedical Research Center SAS, Bratislava, Slovakia
| | - Viktor Stranecky
- Research Unit for Rare Diseases, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Katarina Brennerova
- Department of Paediatrics, Medical Faculty of Comenius University, National Institute of Children's Diseases, Bratislava, Slovakia
| | - Miriam Kolnikova
- Department of Paediatric Neurology, Medical Faculty of Comenius University, National Institute of Children's Diseases, Bratislava, Slovakia
| | - Michaela Pietrzykova
- Department of Clinical Genetics, Institute of Medical Biology, Genetics and Clinical Genetics, Medical Faculty of Comenius University, University Hospital in Bratislava, Bratislava, Slovakia
| | - Miloslav Karhanek
- Department of Metabolic Disorders, Institute of Experimental Endocrinology, Biomedical Research Center SAS, Bratislava, Slovakia
| | - Lenka Noskova
- Research Unit for Rare Diseases, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Marketa Tesarova
- Laboratory for Study of Mitochondrial Disorders, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Hana Hansikova
- Laboratory for Study of Mitochondrial Disorders, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Daniela Gasperikova
- Department of Metabolic Disorders, Institute of Experimental Endocrinology, Biomedical Research Center SAS, Bratislava, Slovakia.
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Savvulidi FG, Ptáček M, Málková A, Golovina E, Pytlík J, Janošíková M, Nagy S, Barbas JP, Stádník L, Savvulidi Vargová K. A Pilot Study on the Uptake of Propidium Iodide and YO-PRO-1 Iodide through the Pannexin Channels in Wallachian Frozen-Thawed Ram Spermatozoa. Folia Biol (Praha) 2023; 69:127-132. [PMID: 38410970 DOI: 10.14712/fb2023069040127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Propidium iodide (PI) and YO-PRO-1 (YPI) dyes are routinely used to determine sperm viability in many livestock species. It is commonly accepted that these dyes penetrate only sperm cells with damaged plasma membranes. Recently, however, the mechanism of dye uptake unrelated to damaged plasma membranes, but instead related to pannexin channels in dog and stallion sperm cells was demonstrated. This pilot study aimed to evaluate the role of pannexins in the uptake of PI and YPI dyes on Wallachian frozen-thawed ram spermatozoa by flow cytometry using probenecid, a specific inhibitor of pannexin channels. Additionally, the expression of pannexins in Wallachian sperm was evaluated directly (by qRT-PCR). The results demonstrate the active role of pannexin channels in the uptake of PI and YPI dyes on frozen-thawed Wallachian ram sperm. In conclusion, when using the PI or YPI exclusion assay to determine Wallachian frozen-thawed ram sperm viability, the danger of overestimating the number of spermatozoa with the damaged plasma membrane must be considered. The observed breed-specific, and more importantly, individual differences in gene expression as well as in dye uptake indicate the need for further studies.
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Affiliation(s)
- Filipp Georgijevič Savvulidi
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Martin Ptáček
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Anežka Málková
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Elena Golovina
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jan Pytlík
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Martina Janošíková
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Szabolcs Nagy
- Institute of Animal Sciences, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, Keszthely, Hungary
| | - Joăo Pedro Barbas
- Instituto Nacional de Investigaçăo Agrária e Veterinária, Quinta da Fonte Boa, Vale de Santarém, Portugal
| | - Luděk Stádník
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic
| | - Karina Savvulidi Vargová
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic.
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