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Waqas MS, Arroyo E, Tibary A. Diagnostic Approach to Equine Testicular Disorders. Vet Sci 2024; 11:243. [PMID: 38921990 PMCID: PMC11209109 DOI: 10.3390/vetsci11060243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/24/2024] [Accepted: 05/24/2024] [Indexed: 06/27/2024] Open
Abstract
Management of breeding stallions is crucial to equine reproduction. The longevity of the breeding career is the ultimate objective, whether the stallion is used for natural cover or for semen collection and artificial insemination. Stud farm veterinarians should be aware of the techniques used to evaluate testicular function and the diagnostic approach to testicular disorders in cases of emergency. This paper presents the clinical methods used to evaluate testicular health, including palpation, ultrasonography, biopsy, and fine-needle aspiration. The discussion of testicular disorders is broken down into four categories: congenital disorders (cryptorchidism, monorchidism, and testicular hypoplasia), differential diagnosis of scrotal enlargement, differential diagnosis of causes of progressive testicular enlargement, and differential diagnosis of testicular asymmetry or reduction in size with an emphasis on testicular degeneration. The sudden increase in testicular size is often accompanied by severe clinical signs and is a major cause for referral of stallion for surgery. Testicular disorders are illustrated with clinical cases seen by the authors.
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Affiliation(s)
- Muhammad-Salman Waqas
- Comparative Theriogenology, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Center for Reproductive Biology, Washington State University, Pullman, WA 99163, USA;
| | - Eduardo Arroyo
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610, USA;
| | - Ahmed Tibary
- Comparative Theriogenology, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Center for Reproductive Biology, Washington State University, Pullman, WA 99163, USA;
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2
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Akar M, Çevik M, Kocaman A, Kaya C, Esin B, Björkman S. Melatonin Administration Enhances Testicular Volume, Testicular Blood Flow, Semen Parameters and Antioxidant Status during the Non-Breeding Season in Bafra Rams. Animals (Basel) 2024; 14:442. [PMID: 38338085 PMCID: PMC10854573 DOI: 10.3390/ani14030442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Our objectives were to investigate the effects of exogenous melatonin on testicular volume (TV), testicular blood flow (TBF), and semen quality in Bafra rams during the non-breeding season. One group of rams (MEL, n = 5) received a 36 mg melatonin implant twice, with 30 days in between, while the other group (CON, n = 5) served as the control. TBF, TV, and semen quality parameters were determined at three-week intervals starting three weeks before until twelve weeks after the first melatonin implant. Testicular blood flow was determined in the supratesticular (STA) and marginal testicular artery (MA) using color Doppler ultrasound. Semen was collected and evaluated, and the total oxidative status (TOS) and total antioxidative status (TAS) was determined using an ELISA. The MEL group had increased (p < 0.05) TV between the sixth and twelfth week after the start of treatment. Overall, the MEL group had lower resistance and pulsatility indexes (p < 0.05) between the third and ninth week, although there was no difference (p > 0.05) between the two groups in most semen quality parameters. However, TAS concentrations increased (p < 0.05) in the MEL group compared with the CON. The results of this study show that exogenous melatonin in the non-breeding season significantly increased both TBF and TV in Bafra rams. Therefore, giving rams implants with 36 mg melatonin twice at least one month prior to the non-breeding season is expected to improve testicular size and function and reproductive capacity.
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Affiliation(s)
- Melih Akar
- Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, 00014 Helsinki, Finland;
| | - Mesut Çevik
- Department of Animal Reproduction and Artificial Insemination, University of Ondokuz Mayis, Samsun 55200, Türkiye; (M.Ç.); (C.K.); (B.E.)
| | - Adem Kocaman
- Department of Histology and Embryology, Medical Faculty, University of Ondokuz Mayis, Samsun 55200, Türkiye;
| | - Cumali Kaya
- Department of Animal Reproduction and Artificial Insemination, University of Ondokuz Mayis, Samsun 55200, Türkiye; (M.Ç.); (C.K.); (B.E.)
| | - Burcu Esin
- Department of Animal Reproduction and Artificial Insemination, University of Ondokuz Mayis, Samsun 55200, Türkiye; (M.Ç.); (C.K.); (B.E.)
| | - Stefan Björkman
- Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, 00014 Helsinki, Finland;
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Bracco C, Gloria A, Contri A. Ultrasound-Based Technologies for the Evaluation of Testicles in the Dog: Keystones and Breakthroughs. Vet Sci 2023; 10:683. [PMID: 38133235 PMCID: PMC10747277 DOI: 10.3390/vetsci10120683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/11/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023] Open
Abstract
Ultrasonography is a valuable diagnostic tool extensively used in the andrology of human and domestic animals, including dogs. This review aims to provide an overview of various technologies based on ultrasound, from the basic B-Mode ultrasonography to the more recent advancements, such as contrast-enhanced ultrasonography (CEUS) and ultrasound elastography (UEl), all of which are utilized in the evaluation of canine testicles. The review outlines the principles behind each of these technologies and discusses their application in assessing normal and abnormal testicular conditions. B-mode canine testicular ultrasonography primarily focuses on detecting focal lesions but has limitations in terms of objectivity. Other technologies, including Doppler ultrasonography, B-Flow, and CEUS, allow for the characterization of vascular patterns, which could be further measured using specific applications like spectral Doppler or quantitative CEUS. Additionally, ultrasound elastography enables the assessment of parenchyma stiffness both qualitatively and quantitatively. These ultrasound-based technologies play a crucial role in andrology by providing valuable information for evaluating testicular function and integrity, aiding in the identification of pathological conditions that may impact the health and quality of life of male dogs.
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Affiliation(s)
| | - Alessia Gloria
- Department of Veterinary Medicine, University of Teramo, Località Piano d’Accio, 64100 Teramo, Italy; (C.B.); (A.C.)
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Neila-Montero M, Alvarez M, Riesco MF, Montes-Garrido R, Palacin-Martinez C, Silva-Rodríguez A, Martín-Cano FE, Peña FJ, de Paz P, Anel L, Anel-Lopez L. Ovine fertility by artificial insemination in the breeding season could be affected by intraseasonal variations in ram sperm proteomic profile. Theriogenology 2023; 208:28-42. [PMID: 37290145 DOI: 10.1016/j.theriogenology.2023.05.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/24/2023] [Accepted: 05/30/2023] [Indexed: 06/10/2023]
Abstract
It is important to note that seasonality could affect ram reproductive parameters, and therefore, fertility results after artificial insemination. In this work, 1) we assessed fertility rates after cervical artificial insemination of 11,805 ewes at the beginning (June 21st to July 20th) and at the end (November 20th to December 21st) of the reproductive season in the Assaf breed for the last four years, and 2) we aimed to identify male factors influencing the different reproductive success obtained depending on the time at the mating season in which ovine artificial insemination was performed. For this purpose, we evaluated certain ram reproductive and ultrasonographical parameters as well as we performed a multiparametric and proteomic sperm analysis of 6-19 rams at two very distant points in the mating season (July as Early Breeding Season -EBS- and November as Late Breeding Season -LBS-). Rutinary assessments carried out in the ovine reproduction centers (testicular volume, libido, sperm production and mass motility) showed non-significant differences (P ≥ 0.05) between both studied times, as well as the ram ultrasonographic evaluation (Resistive and Pulsatility Index as Doppler parameters; and pixels mean gray level, and hypoechoic areas percentage and density as echotexture parameters). However, at level of sperm functionality, although sperm quality appeared non-significantly lower (P ≥ 0.05) in the EBS, we identified a significantly different (P < 0.05) sperm proteomic profile between the seasonality points. The following proteins were identified with the lowest abundance in the EBS with a fold change > 4, a P = 2.40e-07, and a q = 2.23e-06: Fibrous Sheath-Interacting Protein 2, Disintegrin and Metalloproteinase Domain-Containing Protein 20-like, Phosphoinositide-Specific Phospholipase C, Tektin 5, Armadillo Repeat-Containing Protein 12 Isoform X3, Solute Carrier Family 9B1, Radial Spoke Head Protein 3 Homolog, Pro-Interleukin-16, NADH Dehydrogenase [Ubiquinone] 1 Alpha Subcomplex Subunit 8, Testis, Prostate and Placenta-Expressed Protein, and Acyl Carrier Protein Mitochondrial. In conclusion, while our basic analyses on male and sperm quality showed similar results between the beginning and the end of the breeding season, on a proteomic level we detected a lower expression of sperm proteins linked to the energy metabolism, sperm-oocyte interactions, and flagellum structure in the EBS. Probably, this different protein expression could be related to the lower fertility rate of Assaf ewes after cervical artificial insemination at this time. More importantly, sperm proteins can be used as highly effective molecular markers in predicting sperm fertilization ability related to intraseasonal variations.
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Affiliation(s)
- Marta Neila-Montero
- Itra-ULE, INDEGSAL, University of León, León, Spain; Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Mercedes Alvarez
- Itra-ULE, INDEGSAL, University of León, León, Spain; Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Marta F Riesco
- Itra-ULE, INDEGSAL, University of León, León, Spain; Cellular Biology, Department of Molecular Biology, University of León, León, Spain.
| | - Rafael Montes-Garrido
- Itra-ULE, INDEGSAL, University of León, León, Spain; Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Cristina Palacin-Martinez
- Itra-ULE, INDEGSAL, University of León, León, Spain; Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Antonio Silva-Rodríguez
- Facility of Innovation and Analysis in Animal Source Foodstuffs, University of Extremadura, Cáceres, Spain
| | - Francisco E Martín-Cano
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Paulino de Paz
- Itra-ULE, INDEGSAL, University of León, León, Spain; Cellular Biology, Department of Molecular Biology, University of León, León, Spain
| | - Luis Anel
- Itra-ULE, INDEGSAL, University of León, León, Spain; Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Luis Anel-Lopez
- Itra-ULE, INDEGSAL, University of León, León, Spain; Anatomy, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
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Venianaki AP, Barbagianni MS, Fthenakis GC, Galatos AD, Gouletsou PG. Doppler Examination of the Testicular Artery of Beagle-Breed Dogs from Birth to Puberty. Tomography 2023; 9:1408-1422. [PMID: 37489480 PMCID: PMC10366859 DOI: 10.3390/tomography9040112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023] Open
Abstract
The objectives were (a) the study of haemodynamic parameters of blood flow within the testicular artery, (b) the assessment of differences in these parameters at different segments of the artery (i.e., sequentially, as the artery flows through different regions of the testis), and (c) the identification of potential associations with measures of testicular maturation. Eight healthy beagle-breed male dogs were monitored at fortnightly intervals from the 4th to the 40th week of life, by using clinical, seminological, and ultrasonographic (B-mode, pulsed-wave Doppler) examinations. Haemodynamic parameters were assessed at four different segments of the testicular artery: at the distal supra-testicular, the marginal testicular at the cranial pole of the testis, the marginal testicular at the caudal pole of the testis, and the intratesticular. The study period was divided into three time slots (pre-puberty, puberty, and post-puberty) depending on testicular maturation and sperm production. No clinically evident abnormalities were seen in any animal throughout the study. Semen ejaculates were first collected on the 28th week, and spermatozoa were first seen on the 30th week of life. The results of B-mode examination indicated that in all dogs, the echogenicity of the testicular parenchyma was homogeneous. The waveforms of the blood flow in the testicular artery were monophasic with systolic peaks, low diastolic flow, and low vascular resistance. Most cases of significant differences between the three age periods were noted for the comparison of the pre-pubertal to pubertal periods (n = 11); among the parameters studied, the blood volume (n = 9) showed most instances of significant differences; finally, most cases of significant differences were noted in the distal supra-testicular artery (n = 12). Correlations were mainly seen for the end diastolic velocity, the peak systolic velocity and the blood volume (each with two semen evaluation parameters). The distal supra-testicular and the marginal artery at the cranial pole of the testis are recommended as the most appropriate segments of the vessel for performing a Doppler examination in the testicular artery due to the adequate size and the clear spectral waveforms as early as the 12th week of age of the animals.
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Affiliation(s)
- Athina P Venianaki
- Clinic of Obstetrics and Reproduction, Faculty of Veterinary Science, School of Health Sciences, University of Thessaly, 43100 Karditsa, Greece
| | - Mariana S Barbagianni
- Clinic of Surgery, Faculty of Veterinary Science, School of Health Sciences, University of Thessaly, 43100 Karditsa, Greece
| | | | - Apostolos D Galatos
- Clinic of Surgery, Faculty of Veterinary Science, School of Health Sciences, University of Thessaly, 43100 Karditsa, Greece
| | - Pagona G Gouletsou
- Clinic of Obstetrics and Reproduction, Faculty of Veterinary Science, School of Health Sciences, University of Thessaly, 43100 Karditsa, Greece
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Pérez-Durand MG, Massa-Guzmán A, Luque-Mamani N, Ruelas-Calloapaza DA, Urviola-Sánchez JM, Condori-Chuchi EA, Gutiérrez-Reinoso MA, Perez-Guerra UH, García-Herreros M. Age-Related Differences in Testosterone Concentration and Its Relation to Testicular Biometrics, Hemodynamics, and Fertility in Alpacas ( Vicugna pacos). Vet Sci 2023; 10:429. [PMID: 37505834 PMCID: PMC10385440 DOI: 10.3390/vetsci10070429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/29/2023] Open
Abstract
The goal of this study was to investigate the age-related differences in testosterone concentration and its relation to testicular biometrics, testicular blood flow, and fertility in alpacas (Vicugna pacos). Fifteen alpaca males with different ages (young (YM; ~12-14 mo.), n = 5; intermediate (IM; ~24 mo.), n = 5; and old (OM; ≥36 mo.), n = 5) were enrolled in the study. Blood samples were taken from each alpaca male and the circulating plasmatic testosterone concentration (TC; ng/mL) was determined using ELISA analysis. The testicular traits related to bio-morphometric parameters (the length (L), width (W), area (A), and volume (TV)) were assessed using B-mode ultrasonography. Pulse-wave/power Doppler ultrasonography was used to obtain the circulatory dynamic values (testicular hemodynamics) before the beginning of natural service mating. Significant differences were observed in TC among the age groups, increasing as the age of the males increased (2.47 ± 0.31, 8.45 ± 1.53, and 22.66 ± 2.15 for YM, IM, and OM, respectively; p < 0.05); however, no differences were observed regarding the testicular B-mode ultrasonographic parameters (L, W, and A) (p > 0.05). Positive correlations were observed between TV and testicular L, W, and A (r = 0.96, r = 0.95, and r = 0.96, respectively; p ≤ 0.001). Pulse-wave-Doppler-derived parameters such as the pulsatility index (PI) and the resistive index (RI), as well as the total vascularity area (TVA) assessed by power Doppler, were similar in all of the age groups studied (p > 0.05). General linear model (GLM) analysis showed a relationship between TC and TV (OR = 0.95; p = 0.04), as well as between TC and TVA (OR = 0.99; p= 0.02). Finally, no differences were observed regarding the pregnancy rate among the different age groups (p > 0.05). In conclusion, TC increased as the age of the alpaca males increased. Although TC was related to TV and TVA, the pregnancy rates obtained from individuals belonging to the different age groups were similar, indicating that TC, TV, and TVA were not determining factors in assessing the potential age-related fertility differences in alpaca males.
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Affiliation(s)
- Manuel G Pérez-Durand
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno 21001, Peru
| | - Angela Massa-Guzmán
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno 21001, Peru
| | - Natalio Luque-Mamani
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno 21001, Peru
| | | | - Jesús M Urviola-Sánchez
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno 21001, Peru
| | - Eloy A Condori-Chuchi
- Escuela Profesional de Medicina Veterinaria, Laboratorio de Medicina de Animales Mayores, Univesidad Nacional San Antonio Abad del Cusco, Cusco 08000, Peru
| | - Miguel A Gutiérrez-Reinoso
- Carrera de Medicina Veterinaria, Facultad de Ciencias Agropecuarias y Recursos Naturales, Universidad Técnica de Cotopaxi (UTC), Latacunga 050150, Ecuador
| | - Uri H Perez-Guerra
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional del Altiplano, Puno 21001, Peru
| | - Manuel García-Herreros
- Instituto Nacional de Investigação Agrária e Veterinária (INIAV), 2005-048 Santarém, Portugal
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ALBUQUERQUE RDS, MONTEIRO FDDO, LIMA MM, da SILVA AOA, CUNHA MSE, da CONCEIÇÃO MEBAM, SCHEEREN VFDC, FREITAS CDP, PAPA FO, MONTEIRO BM, VIANA RB, COUTINHO LN, MIRANDA MDS, TEIXEIRA PPM. Testicular alterations and semen quality in a selected group of breeding buffaloes. J Vet Med Sci 2023; 85:523-527. [PMID: 36928284 PMCID: PMC10139788 DOI: 10.1292/jvms.22-0512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/15/2023] [Indexed: 03/16/2023] Open
Abstract
Testicular ultrasound enables the evaluation of changes in the testicular parenchyma. This study aimed to report the occurrence of hypoechogenic testicular alterations and their relationship with semen quality in five breeding buffaloes. Two buffaloes presented with hyperechoic points characteristic of fibrosis and anechoic density content between the parietal and visceral tunica. The two bulls without ultrasonographic changes showed higher average trajectory speed, linear velocity, curvilinear velocity, amplitude of lateral displacement of the spermatic head, total motility, progressive motility, fast speed, and acrosomal membrane values within the normal range. The number of spermatozoa with major and total defects was higher in the group of animals without alterations. The three buffaloes that presented with testicular alterations produced semen within established freezing standards.
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Affiliation(s)
| | | | - Moises Moreira LIMA
- Institute of Veterinary Medicine, Universit Federal do Pará
(UFPA), Castanhal-Pará, Brazil
| | | | - Michel Santos e CUNHA
- Institute of Veterinary Medicine, Universit Federal do Pará
(UFPA), Castanhal-Pará, Brazil
| | | | - Verônica Flores da Cunha SCHEEREN
- Department of Animal Reproduction and Veterinary Radiology,
College of Veterinary Medicine and Animal Science, São Paulo State University, São Paulo,
Brazil
| | - Camila de Paula FREITAS
- Department of Animal Reproduction and Veterinary Radiology,
College of Veterinary Medicine and Animal Science, São Paulo State University, São Paulo,
Brazil
| | - Frederico Ozanam PAPA
- Department of Animal Reproduction and Veterinary Radiology,
College of Veterinary Medicine and Animal Science, São Paulo State University, São Paulo,
Brazil
| | - Bruno Moura MONTEIRO
- Institute of Health and Animal Production, Federal Rural
University of the Amazon, Belém-Pará, Brazil
| | - Rinaldo Batista VIANA
- Institute of Health and Animal Production, Federal Rural
University of the Amazon, Belém-Pará, Brazil
| | - Leandro Nassar COUTINHO
- Institute of Health and Animal Production, Federal Rural
University of the Amazon, Belém-Pará, Brazil
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Seasonal Alterations in Testicular Hemodynamics and Echotexture in Relation to Semen Quality in Buffalo Bulls. Andrologia 2023. [DOI: 10.1155/2023/5003366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The present study is aimed at investigating the usefulness of the pulsed-wave Doppler ultrasonography for the characterization of testicular blood flow in buffaloes during the nonbreeding and breeding seasons. Ten Egyptian buffalo bulls were evaluated for changes in the blood flow (Doppler’s indices: resistive index (RI) and pulsatility index (PI)) at the levels of supratesticular (STA) during the breeding (winter) and nonbreeding season (summer). The alterations in testicular parenchyma echotexture (pixel intensity (PIX) and echotexture heterogeneity (EH)) were assessed by computer analysis software. Circulating testosterone and nitric oxide (NO) concentrations and total antioxidant capacity (TAC) were measured colorimetrically. Sperm parameters including total and progressive motility %, viability %, morphology %, and concentrations were assessed. Results revealed lower values (
) of RI (
) and PI (
) within the STA in the breeding period compared to the nonbreeding period (RI:
; PI:
). Higher (
) PIX and EH were found in the nonbreeding season (PIX:
; EH:
) compared to the breeding season (PIX:
; EH:
). Concentrations of testosterone and TAC were not significantly changed. However, the concentrations of NO were greater (
) during the breeding season (
) compared to those of the nonbreeding one (
). Total motility %, progressive motility %, viability %, and sperm concentrations were higher during the breeding season compared to that during the nonbreeding season (
). In conclusion, seasonality alters testicular hemodynamics and echotexture, NO concentrations, and sperm quality in buffaloes without alterations in the testosterone and TAC levels.
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El-Shalofy AS, Samir H, El-Sherbiny HR. Intramuscular administration of l-arginine boosts testicular hemodynamics, plasma concentrations of testosterone and nitric oxide in heat-stressed rams. Theriogenology 2023; 197:127-132. [PMID: 36502590 DOI: 10.1016/j.theriogenology.2022.11.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 10/29/2022] [Accepted: 11/22/2022] [Indexed: 11/24/2022]
Abstract
The current study aimed to assess, for the first time, the effects of intramuscular injection of l-arginine (L-arg) on testicular hemodynamics, echogenicity, and plasma concentrations of testosterone, total antioxidant capacity, and nitric oxide (NO) in Ossimi rams. Twelve sexually matured heat-stressed rams were randomly assigned to one of two groups: the L-arg group (n = 6) received 5 mg/kg L-arg dissolved in 2 ml normal saline 0.9%, or the control group (n = 6) received merely 2 ml of normal saline 0.9%. Blood sampling, B-mode ultrasound assessment of the testicular parenchyma, and pulsed-wave Doppler ultrasound of the testicular artery for both right and left testis were performed immediately before 0 min and 1, 4, 24, 48, 72, and 168 h after L-arg or saline administration. In the L-arg group, resistive index (RI) and pulsatility index (PI) means were significantly lower compared to the control group at 4-168 h post-treatment. Plasma testosterone concentrations were higher (P < 0.05) at 4 h and onward in the L-arg treated compared to the control rams, the same for NO levels however its increase (P < 0.05) was observed as soon as 1 h post-treatment. In L-arg treated rams, NO concentrations were positively correlated to plasma testosterone concentrations (r = 0.7, p < .01), but negatively correlated to both RI and PI (r = -0.8 and -0.6, respectively, p < .01). In conclusion, l-arginine administration enhanced testicular blood flow and increased plasma testosterone and nitric oxide concentrations in heat-stressed rams.
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Affiliation(s)
- Amr S El-Shalofy
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
| | - Haney Samir
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Hossam R El-Sherbiny
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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10
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The Use of Doppler Ultrasonography in the Examination of Testicles in Dogs. ACTA VET-BEOGRAD 2022. [DOI: 10.2478/acve-2022-0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Abstract
Doppler ultrasonography is method suitable for observing and measuring the blood supply of many organs. Its principle is the change in the frequency of wave blood that moves with respect to the source of the wave (probe). In a testicular examination, the use of Doppler can also be very useful for detecting abnormalities or pathological conditions. The aim is just to characterize the flow in arteria testicularis in clinically healthy dogs aged 1-5 years. Twelve dogs were included in the study, of which 6 were rough collies weighing approximately 23 kg and 6 were standard dachshunds weighing approximately 9 kg. The pulsatility index (PI) and resistance index (RI) of a.testicularis, as well as the dimensions of the testicles - height and depth, were assessed by ultrasonographic examination using the ALOKA ProSound Alpha 6 ultrasonographic device (Hitachi-Aloka, Japan). The statistical evaluation of the results shows that the differences between the averages of both measurements of PI and RI indices are highly significant, so the weight of the individual had a high effect on the measured values of PI and RI indices. The depth of the testicles was also directly related to the increasing values of PI and RI indices and to the weight of the dogs, in contrast to their height, which did not show any statistical significance in this respect. The measured values and findings may in the future also serve as a basis for determining reference values in testicular ultrasonography according to the weight of dogs, which may be beneficial in clinical status assessment, diagnosis of various pathological conditions, or predicting spermatogenesis and fertility of the individuals.
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Samir H, Mandour AS, Radwan F, Swelum AA, Nagaoka K, Sasaki K, Watanabe G. Effect of xylazine sedation on testicular blood flow, testicular echotexture, and circulating hormones in Shiba goats. Vet Res Commun 2022; 47:849-859. [DOI: 10.1007/s11259-022-10046-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 11/23/2022] [Indexed: 12/02/2022]
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12
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Montes-Garrido R, Riesco MF, Anel-Lopez L, Neila-Montero M, Palacin-Martinez C, Boixo JC, de Paz P, Ortega-Ferrusola C, Hassan MAA, Anel L, Alvarez M. Application of ultrasound technique to evaluate the testicular function and its correlation to the sperm quality after different collection frequency in rams. Front Vet Sci 2022; 9:1035036. [PMID: 36504850 PMCID: PMC9732105 DOI: 10.3389/fvets.2022.1035036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/11/2022] [Indexed: 11/27/2022] Open
Abstract
The frequency of semen collection is a crucial factor to consider in the rams performance inside breeding centers workout. To evaluate this factor, ram Breeding Soundness Evaluation could include sperm quality evaluation and new predictive and non-invasive tools such as ultrasound technique. In this work, an advanced ultrasonography technology, analyzing the testicular volume, echotexture, and vascular function, was used in three different frequencies of semen collection (abstinence frequency, AF; standard frequency, SF; and intensive frequency, IF). Semen samples were cooled (15°C, 6 h) and evaluated in terms of production, motility, viability, apoptosis, and content of reactive oxygen species. Correlation coefficients were calculated between ultrasonography measurements of echotexture and blood flow and sperm quality parameters. Our results showed an increase in the testicular echotexture when the frequency of semen collection was intensified. Doppler parameters (PSV, RI, PI, TABF) increased (P ≤ 0.05) when the frequency of semen collection was intensified. The sperm motility and functionality decreased in the samples of IF (P ≤ 0.05), evidencing the frequency of semen collection's influence. Moreover, moderate positive correlations were established among echotexture and different Doppler parameters with motility parameters in SF. Furthermore, the influence of abstinence days on AI success was analyzed in a field assay. The highest fertility rates were obtained when males had two to five abstinence days. To conclude, frequency of semen collection could be influenced in terms of semen quantity and sperm quality, showing changes in parenchyma echotexture and testicular vascularization. The standard semen collection frequency was the most adequate option. In addition, ultrasonography may be a predictive tool for estimating variations in the sperm quality of donor rams subjected to different frequencies of semen collection in reproduction centers.
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Affiliation(s)
- Rafael Montes-Garrido
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Marta F. Riesco
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Celular Biology, Department of Molecular Biology, University of León, León, Spain
| | - Luis Anel-Lopez
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Anatomy, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain,*Correspondence: Luis Anel-Lopez
| | - Marta Neila-Montero
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Cristina Palacin-Martinez
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Juan Carlos Boixo
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Paulino de Paz
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Celular Biology, Department of Molecular Biology, University of León, León, Spain
| | - Cristina Ortega-Ferrusola
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Mohamed A. A. Hassan
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt
| | - Luis Anel
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
| | - Mercedes Alvarez
- Investigación en Técnicas de Reproducción Asistida – Universidad de León, Instituto de Desarrollo Ganadero y Sanidad Animal, University of León, León, Spain,Animal Reproduction and Obstetrics, Department of Veterinary Medicine, Surgery and Anatomy, University of León, León, Spain
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13
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Samir H, ElSayed MI, Radwan F, Hedia M, Hendawy H, Hendawy AO, Elbadawy M, Watanabe G. An updated insight on testicular hemodynamics: Environmental, physiological, and technical perspectives in farm and companion animals. Vet Res Commun 2022; 47:323-345. [DOI: 10.1007/s11259-022-10022-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/13/2022] [Indexed: 11/19/2022]
Abstract
Abstract
In all organs, control of blood flow is important but might be particularly critical for testicular functions. This is because of the very low oxygen concentration and high metabolic rate of the seminiferous tubules, the physiological temperature of the testis, and its location outside the abdominal cavity. Many factors affect the characteristics of TBF in farm and companion animals, such as environment (thermal and seasonal effects) and physiological (species, breeds, age, body weight, and sexual maturity). Thermal environment stress has detrimental effects on spermatogenesis and consequently has more serious impacts on both human and animal fertility. Numerous studies have been performed to assess TBF in different animal species including bulls, rams, bucks, alpacas, stallions, and dogs with varied results. Hence, assessment of TBF by Doppler ultrasonography is of great importance to estimate the effect of high environment temperature on testicular functions. Also, differences observed in the TBF may result from different technical aspects such as the identification of the segment of the testicular artery to be examined. In the current review, we focused on the imperative roles of TBF in various animal species. Besides, we discussed in detail various factors that could affect TBF. These factors can significantly modify the TBF and thus should be considered when establishing reference values in farm animals for better clinical diagnosis. The information provided in this review is valuable for researchers and veterinarians to help them a better understanding of testicular hemodynamics for the proper evaluation of breeding soundness examination in males.
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14
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Salama A, Abdelnaby EA, Emam IA, Fathi M. Single melatonin injection enhances the testicular artery hemodynamic, reproductive hormones, and semen parameters in German shepherd dogs. BMC Vet Res 2022; 18:403. [PMID: 36376876 PMCID: PMC9664593 DOI: 10.1186/s12917-022-03487-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to determine the effects of melatonin administration on testicular vascular perfusion in relation to steroid hormones and semen characteristics in dogs. The study included 12 normospermic German shepherd dogs (weighed 35 ± 0.5 kg and aged 4 ± 0.5 years). Males received a single melatonin administration (melatonin dimethyl sulfoxide + corn oil via subcutaneous route; MEL; n = 6), while the rest of the animals served as controls (dimethyl sulfoxide + corn oil; Control; n = 6). Males were subjected to routine examination on days -15, 0, 15, 30, 45, and 60. All examined dogs were subjected to Doppler screening, semen collection, and blood sampling. The MEL group showed a significant (P < 0.05) elevation in semen volume, concentration, percentage of sperm motility, and total sperm × 106 / ejaculate compared to other control males. Doppler indices as resistance (RI) and pulsatility (PI) indices declined (P < 0.05) from D 30 (1.02 ± 0.01) until day 60 (0.87 ± 0.02) of treatment. In MEL males, the peak systolic point of velocity (PSV; cm/sec) of the testicular artery elevated (P < 0.05) on day 60 (20.15 ± 0.99) compared to its value on day 0 (17.39 ± 1.84). On D 60, the levels of testosterone (T), estradiol 17-ß (E2), and nitric oxide (NO) elevated (P < 0.05). A negative correlation was detected between testicular volume, scrotal circumference (SC), T levels, Doppler indices, and velocities. In conclusion, single melatonin administration could improve testicular vascularization via increasing Doppler velocities and intratesticular colored areas. In addition, it could improve semen picture and steroids (T and E2) and nitric oxide.
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Affiliation(s)
- Ali Salama
- Theriogenology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Elshymaa A Abdelnaby
- Theriogenology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
| | - Ibrahim A Emam
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Mohamed Fathi
- Theriogenology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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15
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Use of auxiliary techniques for assessing the reproductive capacity of natural service Nellore bulls. Anim Reprod Sci 2022; 247:107090. [DOI: 10.1016/j.anireprosci.2022.107090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/23/2022] [Accepted: 10/06/2022] [Indexed: 11/18/2022]
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16
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Hassan MAA, Sayed RKA, Abdelsabour-Khalaf M, Abd-Elhafez EA, Anel-Lopez L, Riesco MF, Ortega-Ferrusola C, Montes-Garrido R, Neila-Montero M, Anel L, Alvarez M. Morphological and ultrasonographic characterization of the three zones of supratesticular region of testicular artery in Assaf rams. Sci Rep 2022; 12:8334. [PMID: 35585142 PMCID: PMC9117313 DOI: 10.1038/s41598-022-12243-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 05/09/2022] [Indexed: 11/25/2022] Open
Abstract
To fully understand the histological, morphometrical and heamodynamic variations of different supratesticular artery regions, 20 mature and healthy Assaf rams were examined through ultrasound and morphological studies. The testicular artery images of the spermatic cord as shown by B-mode analysis indicated a tortuous pattern along its course toward the testis, although it tends to be less tortuous close to the inguinal ring. Doppler velocimetric values showed a progressive decline in flow velocity, in addition to pulsatility and vessel resistivity when entering the testis, where there were significant differences in the Doppler indices and velocities among the different regions. The peak systolic velocity, pulsatility index and resistive index were higher in the proximal supratesticular artery region, followed by middle and distal ones, while the end diastolic velocity was higher in the distal supratesticular region. The total arterial blood flow and total arterial blood flow rate reported a progressive and significant increase along the testicular cord until entering the testis. Histological examination revealed presence of vasa vasorum in the tunica adventitia, with their diameter is higher in the proximal supratesticular zone than middle and distal ones. Morphometrically, the thickness of the supratesticular artery wall showed a significant decline downward toward the testis; meanwhile, the outer arterial diameter and inner luminal diameter displayed a significant increase distally. The expression of alpha smooth muscle actin and vimentin was higher in the tunica media of the proximal supratesticular artery zone than in middle and distal ones.
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Affiliation(s)
- Mohamed A A Hassan
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Sohag, 82524, Egypt
| | - Ramy K A Sayed
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Sohag, 82524, Egypt
| | - Mohammed Abdelsabour-Khalaf
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, South Valley University, Qena, 83523, Egypt
| | - Enas A Abd-Elhafez
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526, Egypt
| | - L Anel-Lopez
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain. .,Department of Veterinary Medicine, Surgery and Anatomy, University of León, 24071, León, Spain.
| | - M F Riesco
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain.,Cellular Biology, Department of Molecular Biology, University of León, 24071, León, Spain
| | - C Ortega-Ferrusola
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - R Montes-Garrido
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain.,Department of Veterinary Medicine, Surgery and Anatomy, University of León, 24071, León, Spain
| | - M Neila-Montero
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain.,Department of Veterinary Medicine, Surgery and Anatomy, University of León, 24071, León, Spain
| | - L Anel
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain.,Department of Veterinary Medicine, Surgery and Anatomy, University of León, 24071, León, Spain
| | - M Alvarez
- ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain.,Department of Veterinary Medicine, Surgery and Anatomy, University of León, 24071, León, Spain
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17
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Kozłowska N, Faundez R, Borzyszkowski K, Dąbrowski S, Jasiński T, Domino M. The Relationship between the Testicular Blood Flow and the Semen Parameters of Rams during the Selected Periods of the Breeding and Non-Breeding Seasons. Animals (Basel) 2022; 12:ani12060760. [PMID: 35327158 PMCID: PMC8944436 DOI: 10.3390/ani12060760] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/11/2022] [Accepted: 03/16/2022] [Indexed: 02/01/2023] Open
Abstract
The study aimed to conduct advanced semen evaluation tests during routine ram examination periods in the breeding and non-breeding seasons and to investigate their correlation with the dynamics of testicular blood flow. Semen was collected from eighteen rams, and pulse wave Doppler examination before (BBS), during (BS), and after the breeding season (ABS). Routine and advanced semen analysis, including computer-assisted sperm analysis (CASA), sperm chromatin dispersion test (SCD), and motile sperm organelle morphology examination (MSOME), were conducted. In Doppler ultrasonography, the peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI), and pulsatility index (PI) were calculated. In BS period, high sperm concentration (p < 0.0001) and total sperm number/ejaculate (p = 0.008) were noted. During the BBS period, a low percentage of forwarding motility (p = 0.017) and high sperm abnormalities (p = 0.005) were found. Also during this period, both SCD and MSOME revealed high sperm DNA fragmentation (p < 0.0001) and signs of vacuolization (Grade II-IV, p < 0.05). The advanced features of higher sperm abnormalities (Grade IV of MSOME) correlated with an increase RI (ρє <0.60;0.61>) and PI (ρє <0.46;0.52>), whereas the basic percentage of sperm abnormalities correlated with the EDV (ρє <0.44;0.73>) value. One may conclude that the current preliminary study requires further research concerning the monthly examination of a ram to provide full yearly characteristics of the relation between advanced semen evaluation tests and the dynamics of testicular blood flow.
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Affiliation(s)
- Natalia Kozłowska
- Department of Large Animal Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, 02-787 Warsaw, Poland; (N.K.); (S.D.); (T.J.)
| | - Ricardo Faundez
- InviMed Fertility Clinics, 02-532 Warsaw, Poland
- Correspondence: (R.F.); (M.D.); Tel.: +48-22-593-61-91 (M.D.)
| | | | - Sebastian Dąbrowski
- Department of Large Animal Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, 02-787 Warsaw, Poland; (N.K.); (S.D.); (T.J.)
| | - Tomasz Jasiński
- Department of Large Animal Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, 02-787 Warsaw, Poland; (N.K.); (S.D.); (T.J.)
| | - Małgorzata Domino
- Department of Large Animal Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, 02-787 Warsaw, Poland; (N.K.); (S.D.); (T.J.)
- Correspondence: (R.F.); (M.D.); Tel.: +48-22-593-61-91 (M.D.)
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18
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Da Silva-Álvarez E, Ortiz-Rodríguez J, Gaitskell-Phillips G, Serres C, García-Rodríguez B, Gutiérrez-Cepeda L, Martín- Cano F, Echegaray A, Escartin-Casas N, Requena F, Gil M, Peña F, Ortega-Ferrusola C. Evaluation of testicular echotexture with Ecotext as a diagnostic method of testicular dysfunction in stallions. Theriogenology 2022; 185:50-60. [DOI: 10.1016/j.theriogenology.2022.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 12/16/2021] [Accepted: 03/07/2022] [Indexed: 11/28/2022]
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19
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El-Shalofy A, Shahat A, Hedia M. Effects of melatonin administration on testicular hemodynamics, echotexture, steroids production, and semen parameters during the non-breeding season in Ossimi rams. Theriogenology 2022; 184:34-40. [DOI: 10.1016/j.theriogenology.2022.02.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/13/2022] [Accepted: 02/28/2022] [Indexed: 12/20/2022]
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20
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Orlandi R, Vallesi E, Boiti C, Polisca A, Bargellini P, Troisi A. Characterization of Testicular Tumor Lesions in Dogs by Different Ultrasound Techniques. Animals (Basel) 2022; 12:ani12020210. [PMID: 35049832 PMCID: PMC8773431 DOI: 10.3390/ani12020210] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 12/16/2022] Open
Abstract
In this retrospective study, we assessed the accuracy of different blood flow imaging in diagnosing testicular tumor types in dogs. We recruited 27 dogs with leydigomas (14), seminomas (eight), sertoliomas (six), and mixed cells (five) confirmed histopathologically. In intact dogs, Pampiniform plexus and marginal arteries were scanned through pulsed Doppler. Blood flow and presence of intralesional/perilesional arteries were assessed by color and power Doppler, B-flow, and contrast-enhanced ultrasound. Tumor types did not differ by B-Mode ultrasonography characters. Pampiniform and testicular arteries of sertoliomas had higher (p < 0.05) pulsatility and resistive indexes. The proportion of leydigomas with a perilesional and/or perilesional/intralesional blood flow pattern detected by color and pulsed Doppler and B-flow was higher (p < 0.05) than that of the other tumors counted together. This resulted in a sensitivity of 81.8%, 83.3%, and 85.7%, a specificity of 76.5%, 56.3%, and 73.7%, and a correct classification rate of 78.6%, 67.9%, and 78.8%, respectively. While contrast enhanced ultrasound was highly effective in detecting all tumors, qualitative and quantitative parameters did not contribute to their differential diagnosis. In conclusion, results indicate that different testicular tumor types of dogs have subtly different vascular patterns, a condition that could help in identifying leydigomas.
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Affiliation(s)
- Riccardo Orlandi
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy; (R.O.); (E.V.); (P.B.)
| | - Emanuela Vallesi
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy; (R.O.); (E.V.); (P.B.)
- Anicura CMV Clinica Veterinaria, Via G.B. Aguggiari 162, 21100 Varese, Italy
| | - Cristiano Boiti
- Tyrus Science Foundation, Via Bartocci 1G, 05100 Terni, Italy;
| | - Angela Polisca
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy
- Correspondence: ; Tel.: +39-07-5585-7623
| | - Paolo Bargellini
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy; (R.O.); (E.V.); (P.B.)
| | - Alessandro Troisi
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Macerata, Italy;
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21
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Raisi A, Davoodi F. Testicular torsions in veterinary medicine. Vet Res Commun 2022; 46:303-313. [PMID: 35001221 DOI: 10.1007/s11259-021-09873-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/04/2021] [Indexed: 10/19/2022]
Abstract
The purpose of this review is to provide a comprehensive comparison of spermatic cord torsion in domestic animals. Spermatic cord torsion leads to occlusion of testicular blood flow resulting in ischemia and tissue hypoxia. Spermatic cord torsion has been reported in all domestic mammals but dogs and horses are overrepresented. Abdominal pain (colic), anorexia, vomiting, lameness, and stiff gait are the most common clinical signs reported. The condition may be asymptomatic in cases of a low degree of spermatic cord torsion. In dogs, spermatic cord torsion is most commonly reported in undescended testes, which in some cases are neoplastic. However, in horses, spermatic cord torsion occurs more commonly in scrotal testes. Surgical treatment for spermatic cord torsion depends upon the degree and duration of torsion. If the affected testis is located within the scrotum and determined to still be viable, detorsion with orchidopexy can be performed. Orchiopexy of the unaffected scrotal testis is also recommended in stallions. If the affected testis cannot be salvaged, unilateral or bilateral orchidectomy is recommended. In all cases of spermatic cord torsion of an undescended testis, orchidectomy is recommended. Veterinarians should be aware of the clinical signs and treatment options for spermatic cord torsion in domestic mammals.
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Affiliation(s)
- Abbas Raisi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Lorestan University, Khorramabad, Iran.
| | - Farshid Davoodi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Lorestan University, Khorramabad, Iran. .,Department of Surgery and Diagnostic Imaging, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
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22
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Hedia M, El-Shalofy A. Oxytocin improves testicular blood flow without enhancing the steroidogenic activity in Baladi goats. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2022. [DOI: 10.4103/2305-0500.356841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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23
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Hedia M, El-Shalofy A. Ageing affects plasma steroid concentrations and testicular volume, echotexture and haemodynamics in rams. Andrologia 2021; 54:e14309. [PMID: 34755370 DOI: 10.1111/and.14309] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 12/26/2022] Open
Abstract
The objective was to determine the effect of ageing on plasma steroid concentrations and testicular volume, echotexture and haemodynamics in Ossimi rams. Twenty-four rams were allocated, by age, into three groups: young (1 year; 32.00 ± 0.78 kg, n = 6); mature (2.5 years; 48.00 ± 1.02 kg, n = 9) and aged (7.5 years; 65.00 ± 1.10 kg, n = 9). Aged rams had the highest (p ˂ 0.05) plasma testosterone concentrations 3.90 ± 0.75 ng/ml (three-fold the other groups), whereas in young rams, plasma estradiol-17β concentrations (5.85 ± 0.34 pg/ml) were approximately one-quarter (p ˂ 0.05) of other groups. Regarding pulsed-wave Doppler indices values of the (resistive index RI; and pulsatility index PI) were lower (p ˂ 0.05) in the mature (0.32 ± 0.04 and 0.36 ± 0.03, respectively) and aged (0.51 ± 0.03 and 0.77 ± 0.06) rams compared to young rams (0.62 ± 0.03 and 0.98 ± 0.07). In the young group, testicular pixel intensity was highest (p ˂ 0.05) but values of coloured area/pixels were lowest (p ˂ 0.05) compared to the other groups. In conclusion, these parameters indicate that aged rams (7.5 years) are likely to be suitable for breeding ahead of the younger aged groups (1 and 2.5 years) examined, but a final decision would need to be tempered by consideration of other parameters in the breeding soundness examination (BSE), such as physical soundness and semen characteristics. Of the parameters studied, testicular pixel intensity could be most readily incorporated in a BSE for deciding a ram's breeding efficiency.
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Affiliation(s)
- Mohamed Hedia
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Amr El-Shalofy
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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24
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El-Shalofy AS, Hedia MG. Effects of buserelin administration on testicular blood flow and plasma concentrations of testosterone and estradiol-17β in rams. Domest Anim Endocrinol 2021; 77:106646. [PMID: 34175682 DOI: 10.1016/j.domaniend.2021.106646] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/28/2021] [Accepted: 05/24/2021] [Indexed: 12/12/2022]
Abstract
This research aimed to examine for the first time the impact of single dose administration of gonadotropin-releasing hormone (GnRH) analog buserelin acetate on the testicular blood flow measurements (peak systolic velocity [PSV], end-diastolic systolic velocity [EDV], resistive index [RI], and pulsatility index [PI]) and the plasma steroids (testosterone and estradiol-17β) concentrations in rams. For this purpose, twelve adult Ossimi rams were randomly assigned into the buserelin group (n = 8) and were injected intravenously (iv) with buserelin acetate (0.008 mg/ram), whereas the remaining rams (n = 4) were injected with normal saline iv and served as a control group. Blood sampling and testicular pulsed-wave Doppler scanning were conducted immediately before (0) and 1, 3, 6, 24, 48, 72, 120, and 168 h after treatment. The control group did not reveal any substantial changes (P > 0.05) in the examined parameters, except for the EDV (P < 0.05). In the buserelin-treated group, a marked reduction in RI and PI values (P < 0.05) occurred 1 to 3 h after administration of buserelin. Besides, there was a significant increase in testosterone plasma concentrations following buserelin treatment. In conclusion, the administration of buserelin triggered a series of substantial changes in the testicular blood perfusion and steroidogenesis that could have a positive effect on testicular function in rams.
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Affiliation(s)
- A S El-Shalofy
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.
| | - M G Hedia
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.
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Sprayberry KA, Lu KG. Managing Reproduction Emergencies in the Field: Part 1: Injuries in Stallions; Injury of the External Portion of the Reproductive Tract and Gestational Conditions in the Mare. Vet Clin North Am Equine Pract 2021; 37:339-366. [PMID: 34243877 DOI: 10.1016/j.cveq.2021.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Selected emergency conditions of male and female reproductive tracts in horses are described, including injuries affecting the external genitalia of male horses and emergent conditions arising during gestation in mares. Conditions affecting male horses are discussed in the context of breeding stallions, but kicks or other mechanisms of trauma in the groin can also affect geldings. Priapism, paraphimosis, trauma to the scrotum and testicles, and penile injury are discussed. In mares, traumatic vestibular injury, placentitis, hydropsic conditions, prepubic tendon and abdominal wall compromise, and uterine torsion are included. Clinical recognition of the problem, diagnostic procedures, and treatments are summarized.
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Affiliation(s)
- Kim A Sprayberry
- Department of Animal Sciences, Cal Poly University San Luis Obispo, Cal Poly University, 1 Grand Avenue, San Luis Obispo, CA 93407, USA.
| | - Kristina G Lu
- Hagyard Equine Medical Institute, 4250 Iron Works Pike, Lexington, KY 40511, USA
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El-Shalofy AS, Hedia MG. Exogenous oxytocin administration improves the testicular blood flow in rams. Andrologia 2021; 53:e14193. [PMID: 34309888 DOI: 10.1111/and.14193] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 07/06/2021] [Accepted: 07/12/2021] [Indexed: 12/20/2022] Open
Abstract
The current research aimed to examine the effects of single-dose oxytocin administration on testicular blood flow measurements peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI) and pulsatility index (PI) and plasma steroid (testosterone and oestradiol-17β) concentrations in rams. In the treated group, eight mature Ossimi rams during the breeding season were injected intravenously (iv) with 20 IU oxytocin, while the other eight male rams were administered normal saline (2 ml) iv as a control group. Venous blood samples and testicular blood flow in the left and right testes were examined immediately before (0) and 5, 30, 60 and 120 min after injections. The control group did not show significant changes in the variables examined (p > .05), except for the EDV (p < .05). In the treated group, the administration of oxytocin led to a significant decrease in RI and PI values starting 5 min after oxytocin administration until 60 min after its application (p < .05). The plasma concentrations of testosterone and oestradiol-17β raised from 5 to 30 min after oxytocin injection (p > .05) and then declined significantly until 120 min (p < .05). In conclusion, oxytocin is a potent testicular vasodilator affecting the testicular vascular tone and steroid concentrations in rams.
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Affiliation(s)
- Amr S El-Shalofy
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Mohamed G Hedia
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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Claus LAM, Barca Junior FA, Junior CK, Pereira GR, Fávaro PDC, Ferreira FP, Galdioli VHG, Seneda MM, Ribeiro ELDA. Testicular shape, scrotal skin thickness and testicular artery blood flow changes in bulls of different ages. Reprod Domest Anim 2021; 56:1034-1039. [PMID: 33932236 DOI: 10.1111/rda.13947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/27/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to compare the biometric testicular characteristics, skin thickness and haemodynamics of the testicular artery of 12- and 24-month-old bulls using Doppler ultrasonography, the study was conducted using 48 indicus-taurus animals. The scrotal circumference (SC) and biometry characteristics of the bulls were measured to calculate the testicular volume. Doppler ultrasonography was used to obtain the haemodynamic values of the testicular artery. The skin thickness and volume were lower (p<.01) in the younger bulls (12 months:4.68 ± 0.68 mm; 168.76 ± 47.96 cm3 ) versus 24 months (5.05 ± 0.89; 499.73 ± 129.24 cm3 ) animals (p<.01). During diastole, mean velocity was lower in the 12 months (7.98 ± 3.83) than in the 24 months (11.37 ± 4.15) animals (p <.05). The 12-month-old animals had higher pulsatility and resistivity indices (0.49 ± 0.02; 0.51 ± 0.20) compared to the 24-month-old animals (0.32 ± 0.16; 0.40 ± 0.15) (p < .05). The final testicular end velocity was lower in animals with long/moderate-shaped (L/M) (7.31 ± 2.91) than in those moderate/oval-shaped (M/O) (11.48 ± 3.88) testicles (p < .05). Animals with L/M testes presented higher pulsatility values and resistivity indices (0.51 ± 0.05; 0.55 ± 0.04) compared to animals with M/O shape (0.29 ± 0.20; 0.36 ± 0.15). We showed that the blood flow of the supra testicular artery between the two evaluated ages differed, and that 24-month-old bulls presented better thermoregulation capacity. Animals with a long/moderate testicular format presented a greater vascular resistance, which was imposed on the blood flow due to the anatomical differences in the testicular artery, resulting in lower velocity, and indicating better heat dissipation in this format.
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Affiliation(s)
| | - Flávio Antônio Barca Junior
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil.,REPROA - Animal Reproduction Laboratory, Deparment of Animal Science, State University of Londrina, Londrina, Paraná, Brazil
| | - Celso Koetz Junior
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Gabriel Ribas Pereira
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Patrícia da Cruz Fávaro
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Fabio Procópio Ferreira
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Victor Hugo Gonçalves Galdioli
- Animal Production Laboratory, Animal College of Veterinary Medicine, University of Northern Paraná, Arapongas, Paraná, Brazil
| | - Marcelo Marcondes Seneda
- REPROA - Animal Reproduction Laboratory, Deparment of Animal Science, State University of Londrina, Londrina, Paraná, Brazil
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Góss G, Azevedo M, Duarte C, Mozzaquatro F, Pradella G, Taschetto P, Heckler G, Severo E. Omentum as non-strangled inguino scrotal hernia content in stallion: case report. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Non-strangulated acquired hernias in stallions are rare, especially when the herniated content is not intestinal loops. Thus, the aim of the current study is to describe a case of acquired non-strangulated inguinoscrotal hernia in a stallion, whose herniated content was the omentum. The patient was a Criollo stallion with history of rhabdomyolysis, laminitis and bilateral scrotal volume increase observed in the left scrotal region. The animal presented pain in both thoracic limbs, abnormal blood test, especially hypoproteinemia, and mild pain during palpation in the left inguinal ring region. Hydrocele secondary to hypoproteinemia was suspected. After admission, the animal showed signs of acute abdomen, which were clinically reversed. With this, the animal was subjected to ultrasound examination of the scrotal region, whose findings suggested non-strangulated inguinal hernia, although the content could not be identified. Surgical treatment was chosen in order to identify the herniated content and remove the left testicle. Access to the affected scrotum was performed, in which the presence of fluid and a portion of the omentum was observed surrounding the testis and adhering to it. The animal was discharged after he recovered from the surgery and from laminitis. During the breeding season, the stallion remained with a herd of mares for natural mating. After 15 months of surgery, the animal was reassessed and showed no active signs of inflammatory and degenerative processes in the remaining testis. On this occasion, a pregnancy diagnosis was also performed, and all the mares were pregnant. It is concluded that the presence of omentum as a herniated content does not represent a surgical emergency but can make the reproductive prognosis reserved. In addition, removal of the affected testicle can benefit the spermatogenesis of the remaining testicle.
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Affiliation(s)
- G.C. Góss
- Universidade Federal do Pampa, Brazil
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Abdelnaby EA, Emam IA, Fadl AM. Assessment of the accuracy of testicular dysfunction detection in male donkey (Equus asinus) with the aid of colour-spectral Doppler in relation to plasma testosterone and serum nitric oxide levels. Reprod Domest Anim 2021; 56:764-774. [PMID: 33595865 DOI: 10.1111/rda.13916] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 02/15/2021] [Indexed: 11/27/2022]
Abstract
This study aimed to determine the usefulness of colour and pulsed Doppler modes for the accurate diagnosis of donkeys suffering from subfertility to determine whether testicular vascularity assessment could be an indicator for sperm functionality. The study sample was composed of 10 male donkeys with normospermia (control group) and 10 donkeys with hypospermia. Animals underwent scrotal circumference measurement, testicular Doppler examination, seminal evaluation, blood sampling and hormonal assay. Semen volume and concentration were significantly (p ≤ .05) lower in the subfertile group (30.25 ± 1.22 ml and 89.44 ± 2.55 × 106 /ml) as compared with the control group (82.76 ± 1.65 ml and 452.78 ± 1.25 × 106 /ml), and total sperm/ejaculation was significantly (p ≤ .05) higher in the normal donkeys (28.30 ± 2.32 × 109 /total ejaculated) as compared with the subfertile group. Intratesticular coloured area showed a marked decline in the hypospermic males. There was no significant difference between the two groups in testosterone level, although the normal group showed an increase in nitric oxide metabolites. Both Doppler indices of the three branches of the testicular artery were elevated significantly (p ≤ .05) in abnormal donkeys, whereas Doppler peak systolic and end-diastolic velocities were increased in the normal group. Male donkeys with subfertility demonstrated lower arterial vascularity parameters in the form of intratesticular coloured area and blood flow rate; therefore, the most optimal parameters for differentiating subfertile hypospermic from normospermic donkeys were found to be the two Doppler indices, velocities parameters, testicular blood flow rate and nitric oxide levels.
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Affiliation(s)
- Elshymaa A Abdelnaby
- Theriogenology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Ibrahim A Emam
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Aya M Fadl
- Theriogenology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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Silva DEC, Penitente-Filho JM, Souza Netto DL, Waddington B, de Oliveira RR, Guimarães JD. Nonlinear Models to Describe the Testicular Size Growth Curve of Mangalarga Marchador Stallions. J Equine Vet Sci 2021; 102:103422. [PMID: 34119207 DOI: 10.1016/j.jevs.2021.103422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/03/2021] [Accepted: 02/09/2021] [Indexed: 11/26/2022]
Abstract
This study aimed to describe the testicular growth curve in Mangalarga Marchador stallions fitting nonlinear models to data of total scrotal width (TSW) and testicular volume (TV). A cross-sectional study was conducted with 120 stallions, aging from 1.75 to 21.93 years. The parameters of nonlinear models (Brody, Gompertz, Hill, Logistic I and II, Meloun I and II, Michaelis-Menten, Mitscherlich, and von-Bertalanffy) were estimated by Gauss-Newton iterative process. Goodness of fit was evaluated by the corrected Akaike (AICc) and Bayesian (BIC) information criteria, adjusted R2, error sum of square, mean absolute deviation and average prediction error. Based on the goodness of fit, the Logistic I model fitted better for TSW while Logistic II fitted better for TV growth curve. The inflection point (IP) of TSW growth was estimated in 5.23 cm at 0.76 years; the IP of TV growth was estimated in 139.36 cm3 at 2.57 years. The TV growth curve reached a plateau later than TSW growth curve, mainly because testicular height maintains growth for a longer period. In addition, there were moderate and positive correlations between whiter height and TSW and TV (r = 0.51 and r = 0.53, respectively). Findings suggest that TV is more associated with sexual maturity than sexual precocity. In addition, the moderate and positive correlations between whiter height and TSW and TV indicate that testicular traits can be included in selection programs of Mangalarga Marchador stallions with the same relevance as the morphometric traits.
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Affiliation(s)
| | | | | | - Bruna Waddington
- Department of Veterinary, Universidade Federal de Viçosa, Viçosa, MG, Brazil
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Santos MC, Milani C, Zucchini P, Quirino CR, Romagnoli S, da Cunha ICN. Salmon oil supplementation in dogs affects the blood flow of testicular arteries. Reprod Domest Anim 2021; 56:476-483. [PMID: 33378121 DOI: 10.1111/rda.13886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 12/26/2020] [Indexed: 11/28/2022]
Abstract
The administration of fish oils is known to cause changes in several reproductive parameters of domestic animals. The ingestion of polyunsaturated fatty acids (PUFAs) of the omega-3 family, such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), has been described and correlated with changes in the semen quality, testosterone levels and male fertility. Nevertheless, few studies monitored and registered effects after ceasing supplementation. In the present study, we monitored the Doppler velocimetric and ultrasonographic parameters of nine dogs' testis for 90 days (D90) checking the effect of salmon oil supplementation, and monitoring continued for 60 days more, after ceasing supplementation (D150). Ultrasonographic evaluations comprised determining the Doppler velocimetric parameters, testicular and epididymal volume, and testicular echotexture. Peak systolic velocity (PSV) as well as final diastolic velocity (EDV) in the supratesticular arteries (STA), and marginal artery (MA) increased during the period of treatment and kept that level up to D150. There was no difference between the fish-oil supplementation period and the unsupplemented one regarding the testicular and epididymal volume and echogenicity and heterogeneity characteristics. A negative correlation was found between heterogeneity of testis and sperm production (r = -.41, p = .008). Doppler velocimetry indices were affected by the supplementation, leading to an increase in testicular blood flow.
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Affiliation(s)
| | - Chiara Milani
- Department of Animal Medicine, Production and Health, University of Padova, Legnaro, Italy
| | - Paolo Zucchini
- Department of Animal Medicine, Production and Health, University of Padova, Legnaro, Italy
| | - Celia Raquel Quirino
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos Dos Goytacazes, Brazil
| | - Stefano Romagnoli
- Department of Animal Medicine, Production and Health, University of Padova, Legnaro, Italy
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Velasco A, Ruiz S. New Approaches to Assess Fertility in Domestic Animals: Relationship between Arterial Blood Flow to the Testicles and Seminal Quality. Animals (Basel) 2020; 11:E12. [PMID: 33374860 PMCID: PMC7823812 DOI: 10.3390/ani11010012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/28/2020] [Accepted: 12/16/2020] [Indexed: 12/11/2022] Open
Abstract
The early identification of infertile males improves reproduction efficiency at a production level and is essential to secure high production rates. Before entering a breeding program, males must pass an initial breeding soundness examination (BSE) which consist of several diagnostic exams whose end point is to estimate their future fertility. There is ongoing research to find new markers that allow better identification of fertile males. Doppler mode allows the quantitative and qualitative evaluation of the irrigation of organs. When evaluating the reproductive system, Doppler mode has been successfully used for the evaluation of the uterine and ovarian irrigation. In males, it is gaining relevance for the evaluation of testicular irrigation. Researchers have found a relationship between pulsed-wave Doppler velocimetric parameters and seminal quality in various domestic animal species. This suggests Doppler ultrasound parameters should be considered as objective parameters to evaluate testicular function. In this review, we analyze the results in the main domestic animal species and discuss the differences and similarities among the results. We also discuss the effect of the location of the measurements, breed, season and laterality in the measurement of Doppler velocimetric parameters as well as the impact and limitations of this method of assessing breeding soundness.
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Affiliation(s)
- Ana Velasco
- Department of Physiology, Faculty of Veterinary Medicine, Campus Mare Nostrum, University of Murcia, 30100 Murcia, Spain;
| | - Salvador Ruiz
- Department of Physiology, Faculty of Veterinary Medicine, Campus Mare Nostrum, University of Murcia, 30100 Murcia, Spain;
- Institute for Biomedical Research of Murcia, IMIB-Arrixaca, 30120 Murcia, Spain
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Niżański W, Ochota M, Fontaine C, Pasikowska J. B-Mode and Doppler Ultrasonographic Findings of Prostate Gland and Testes in Dogs Receiving Deslorelin Acetate or Osaterone Acetate. Animals (Basel) 2020; 10:ani10122379. [PMID: 33322633 PMCID: PMC7763262 DOI: 10.3390/ani10122379] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 12/08/2020] [Indexed: 01/15/2023] Open
Abstract
Simple Summary This article presents the use of ultrasonography (basic and advanced techniques) in dogs suffering from benign prostate hyperplasia (BPH) for the assessment of the effects of two different medications: osaterone acetate (YpozaneTM), a registered drug for BPH in dogs, and deslorelin acetate (SuprelorinTM), registered for pharmacological castration in dogs. Based on the obtained results it can be stated that both B-mode and color Doppler Ultrasound imaging techniques are suitable for diagnosis and progress assessment of dogs suffering from BPH. Both investigated medications (osaterone acetate and deslorelin acetate) led to a significant sonographic improvement. Deslorelin acetate reduced prostate volume more slowly, but its effect lasted longer than for osaterone acetate. Abstract This article presents B-mode and color Doppler imaging of the prostate and testes in dogs suffering from benign prostate hyperplasia (BPH), and receiving deslorelin acetate (SuprelorinTM) or osaterone acetate (YpozaneTM). The study was planned as a controlled clinical trial, dogs were divided into negative control (healthy dogs, n = 10), positive control (dogs with BPH, n = 10), and study groups, III (n = 15), receiving deslorelin acetate (DA), and IV (n = 10), receiving osaterone acetate (OA). The B-mode appearance of the prostate parenchyma improved in all investigated dogs from the DA group, and in 60% of OA dogs. Prostate volume was reduced more quickly with OA (from D14), but lasting for a shorter time (on average up to week 20), compared to DA that reduced the prostate volume more slowly (>8 weeks), but the reduction remained longer (>24 weeks). The systolic peak velocity (SPV) and mean velocity (Vmean) were higher in all dogs diagnosed with BPH, compared to Control Group I. The indices did not change in both Control Groups I and II, whereas in study Groups III and IV they decreased throughout the study period compared to day 0 and Control Group II. In Group III the highest reduction was noted from day 21 to week 8, whereas in Group IV the lowest Vmean was recorded before day 21. Testicular parenchyma and volume changed significantly in Group III receiving DA, and the velocity of blood flow in the testicular artery correlated positively with testicular volume only in this group (III). The present study proved the usefulness of B-mode and color Doppler US imaging techniques for diagnosis and progress assessment of dogs suffering from BPH. The blood flow kinetics (mainly SPV) demonstrated a time association between the blood flow changes registered in the prostatic artery, and the subsequent volumetric and sonographic improvement of the prostate parenchyma. The reduction in flow indices was noted prior to the reduction in prostate volume, suggesting that the sonographic recovery of the prostate tissue, occurs secondarily to the regression of the prostate vascular system. Both investigated medications (osaterone acetate and deslorelin acetate) led to a significant sonographic improvement. Deslorelin acetate reduced prostate volume more slowly, but its effect lasted longer than for osaterone acetate.
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Affiliation(s)
- Wojciech Niżański
- Wrocław University of Environmental and Life Sciences, Department of Reproduction and Clinic of Farm Animals, pl. Grunwaldzki 49, 50-366 Wrocław, Poland;
- Correspondence:
| | - Małgorzata Ochota
- Wrocław University of Environmental and Life Sciences, Department of Reproduction and Clinic of Farm Animals, pl. Grunwaldzki 49, 50-366 Wrocław, Poland;
| | - Christelle Fontaine
- Virbac Group, Global Marketing and Business Optimization Department, Companion Animals Veterinary Exclusive Ranges Section, 13ème rue LID, 06511 Carros, France;
| | - Joanna Pasikowska
- Veterinary Clinic, B. Krzywoustego Str. 105/22, 51-166 Wroclaw, Poland;
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Samir H, Radwan F, Watanabe G. Advances in applications of color Doppler ultrasonography in the andrological assessment of domestic animals: A review. Theriogenology 2020; 161:252-261. [PMID: 33341504 DOI: 10.1016/j.theriogenology.2020.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 12/05/2020] [Accepted: 12/05/2020] [Indexed: 02/08/2023]
Abstract
Compared to human cases, potential applications of Doppler imaging technology in farm animals' practice are still limited and are mostly concerned with females. Testicular blood perfusion (TBP) is the pathway through which all nutrients, oxygen, and regulatory agents pass through to the testis. TBP is crucial to the testis function because of the high metabolic rate and very low concentration of oxygen in the seminiferous tubules, which constitute about 70%-80% of the testicular mass. Color Doppler ultrasonography is one of the recent non-invasive technologies, which plays a vital role in the assessment of blood flow to the testis in various animal species. In the past 20 years, a significant number of studies have highlighted the importance of assessments of TBP using color Doppler ultrasonography to illustrate its potential uses for breeding soundness examination, diagnosis, and monitoring of infertility problems in farm animals. This review was aimed at providing, for the first time, updated knowledge on the potential clinical uses of color Doppler ultrasonography for the assessment of TBP in domestic animals. Additionally, a few essential details on the relationship between TBP and male fertility are discussed in this review. Furthermore, a number of caveats relating to the use of color Doppler ultrasonography are discussed, which collectively appear to constrain its routine, on-farm application for breeding soundness assessments, at least at the present. The new perspectives related to animal reproduction that researchers claim to do in further investigations are also discussed.
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Affiliation(s)
- Haney Samir
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt; Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan.
| | - Faten Radwan
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan; Veterinarian Graduated from Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya, 13736, Egypt
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan
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Fávaro PDC, Pereira GR, Barca FA, Adona PR, Franco EMV, Dias IDS, Seneda MM, Koetz Junior C. Hemodynamic evaluation of the supratesticular artery in bulls. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gloria A, Di Francesco L, Marruchella G, Robbe D, Contri A. Pulse-wave Doppler pulsatility and resistive indexes of the testicular artery increase in canine testis with abnormal spermatogenesis. Theriogenology 2020; 158:454-460. [PMID: 33049570 DOI: 10.1016/j.theriogenology.2020.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/25/2020] [Accepted: 10/08/2020] [Indexed: 01/04/2023]
Abstract
Pulse-wave Doppler (PWD) ultrasonography of the testicular artery was recently used to compare parameters in fertile and infertile males, or males with normal and abnormal semen quality, while no studies verified the concomitant histological feature of the testis. The experimental hypothesis of the present study was that the blood flow parameters measured by PWD at different levels of the testicular artery reflect sperm attributes evaluated on spermatozoa collected from the tail of the epididymis and testicular histological characteristics. Pulse-wave Doppler parameters were recorded on both testes from 16 dogs of unknown fertility. After routine castration, epididymal spermatozoa were collected and evaluated for sperm total and progressive motility, membrane integrity, and sperm morphology. Testes were submitted to histological and immunohistochemical evaluations to quantify microscopic attributes and connective tissue and vascular area extent, respectively. The findings showed that the increased PWD indexes were suggestive of testicular histological alteration since negative correlations were found between pulsatility index and resistive index, measured in the marginal testicular artery, and histological attributes such as the seminiferous epithelial thickness (R = -0.528, P = 0.016 and R = -0.554, P = 0.005, respectively) and the tubular area/total area ratio (R = -0.494, P = 0.024 and R = -0.563, P = 0.004, respectively). Some histological characteristics, such as tubular diameter, seminiferous epithelium thickness, and the tubular area/total area ratio of the testis are correlated with the percentage of primary abnormalities (R = -0.874, P = 0.001, and R = -0.847, P = 0.001, and R = - 0.865, P = 0.001, respectively). In testes with increased sperm primary abnormalities, higher pulsatility index was found compared with testes with normal spermatogenesis in supratesticular artery (1.07 ± 0.06 vs 0.82 ± 0.23, P < 0.05), marginal artery (0.73 ± 0.04 vs 0.61 ± 0.07, P < 0.05), and intratesticular artery (0.67 ± 0.03 vs 0.43 ± 0.1, P < 0.05). Similarly, the resistive index was found significantly higher in the same vessel tracts in testes with abnormal and normal spermatogenesis (0.62 ± 0.02, 0.53 ± 0.02, and 0.46 ± 0.02 vs 0.51 ± 0.06, 0.44 ± 0.04, and 0.32 ± 0.06, respectively; P < 0.05). Our data demonstrated for the first time the relationship between PWD indexes and the contextual testicular architecture, suggesting that the pulsatility and resistive indexes could be an effective tool in andrology. In light of different histological alterations in the testis, caution is warranted in the definition of thresholds for normal and abnormal testicular blood flow indexes.
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Affiliation(s)
- Alessia Gloria
- University of Teramo, Faculty of Veterinary Medicine, Località Piano D'Accio, 64100, Teramo, Italy
| | - Lucia Di Francesco
- University of Teramo, Faculty of Veterinary Medicine, Località Piano D'Accio, 64100, Teramo, Italy
| | - Giuseppe Marruchella
- University of Teramo, Faculty of Veterinary Medicine, Località Piano D'Accio, 64100, Teramo, Italy
| | - Domenico Robbe
- University of Teramo, Faculty of Veterinary Medicine, Località Piano D'Accio, 64100, Teramo, Italy
| | - Alberto Contri
- University of Teramo, Faculty of Biosciences and Technologies for Agriculture Food and Environment, Via R. Balzarini 1, 64100, Teramo, Italy.
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Samir H, Nyametease P, Elbadawy M, Nagaoka K, Sasaki K, Watanabe G. Administration of melatonin improves testicular blood flow, circulating hormones, and semen quality in Shiba goats. Theriogenology 2020; 146:111-119. [PMID: 32078960 DOI: 10.1016/j.theriogenology.2020.01.053] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/04/2020] [Accepted: 01/25/2020] [Indexed: 12/28/2022]
Abstract
Despite the role of melatonin in the regulation of the sleep-wake cycle and seasonal-reproduction, the present study investigated, for the first time, the potential role of melatonin on testicular blood flow (TBF) in goats. Twelve sexually mature male Shiba goats were exposed to a single s.c. injection of either melatonin suspended in one ml of corn oil (melatonin group; 36 mg/goat; n = 5) or one ml of corn oil (control group; n = 7). Monitoring the changes in TBF was done one week before (W-1), at the time of injection (W0), and once a week for 8 weeks after injection using color-pulsed Doppler ultrasonography. Concentrations of FSH, LH, inhibin, testosterone (T), estradiol (E2), and insulin-like growth factor-1 (IGF-1) in plasma were determined by radioimmunoassay. Melatonin and nitric oxide (NO) concentrations were measured using enzyme immunoassay kits. Moreover, semen collection and evaluation of some sperm parameters were performed once a week. Results revealed decreases (P < 0.05) in the Doppler indices (resistive index, pulsatility index) of the testicular arteries from W2 till W6 in the melatonin group. FSH, LH, and inhibin concentrations did not change between the two groups, while T, E2, IGF-1, NO, and melatonin concentrations increased (P < 0.05) in the melatonin group compared to the control. Estradiol and NO concentrations increased (P < 0.05), coinciding with decreases in the values of Doppler indices. Notable (P < 0.05) improvements in most parameters of semen quality were seen in the melatonin group. In conclusion, melatonin induced a stimulatory effect on TBF in Shiba goats and possibly, it could be a potential to improve male goats fertility.
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Affiliation(s)
- Haney Samir
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan; Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.
| | - Paul Nyametease
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan; Department of Animal Science, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana
| | - Mohamed Elbadawy
- Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan; Department of Pharmacology, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh, Elqaliobiya, 13736, Egypt
| | - Kentaro Nagaoka
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan
| | - Kazuaki Sasaki
- Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo, 183-8509, Japan.
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Papa PDM, Guasti PN, De Vita B, Nakazato NG, Maia L, Freitas Dell'Aqua CDP, Scheeren VFDC, Segabinazzi LGTM, de Andrade Junior LRP, Silva LFMC, Araújo EAB, Oliveira SN, Papa FO, Landim-Alvarenga FDC, Alvarenga MA. Clinical safety of intratesticular transplantation of allogeneic bone marrow multipotent stromal cells in stallions. Reprod Domest Anim 2020; 55:429-437. [PMID: 31916315 DOI: 10.1111/rda.13624] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 01/04/2020] [Indexed: 12/27/2022]
Abstract
Although stem cell therapy is a promising alternative for treatment of degenerative diseases, there are just few reports on the use of stem cells therapy in horse's reproductive system. This study aims to evaluate the effect of intratesticular injection of bone marrow mesenchymal stromal/stem cells (MSCs) in healthy stallions, and its outcome on seminal parameters and fertility. In Experiment 1, 24 stallions were divided into treatment group (TG) and control group (CG). In the TG, an intratesticular application of MSC was performed, and in the CG, only PBS was used. Measurements of testicular volume, surface temperature and Doppler ultrasonography were performed 24 and 48 hr after treatments. Fifteen days after application, the testicles were removed and submitted to histological analysis. In Experiment 2, 3 fertile stallions received similarly treatment with MSCs. Physical examination and sperm analysis were performed weekly during 60 days after treatment, and at the end, semen from one of them was used for artificial inseminations of 6 healthy mares. In Experiment 1, clinical examinations showed no signals of acute inflammation on both groups according to the analysed variables (p > .05). Also, no signal of chronic inflammation was observed on histological evaluation. In Experiment 2, stallions presented no physical alterations or changes in sperm parameters, and a satisfactory fertility rate (83%; 5/6) was observed after AI. The results support the hypothesis that intratesticular application of bone marrow MSCs is a safe procedure, and this could be a promising alternative to treat testicular degenerative conditions.
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Affiliation(s)
- Patrícia de Mello Papa
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Priscilla Nascimento Guasti
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Bruna De Vita
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Nathalia Genú Nakazato
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Leandro Maia
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Camila de Paula Freitas Dell'Aqua
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Verônica Flores da Cunha Scheeren
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | | | - Luiz Roberto Pena de Andrade Junior
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Luis Fernando Mercês Chaves Silva
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Endrigo Adonis Braga Araújo
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Sidnei Nunes Oliveira
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Frederico Ozanam Papa
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Fernanda da Cruz Landim-Alvarenga
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
| | - Marco Antonio Alvarenga
- Department of Animal Reproduction and Veterinary Radiology, College of Veterinary Medicine and Animal Science, Sao Paulo State University, Botucatu, Brazil
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Claus LAM, Barca Junior FA, Koetz Junior C, Pereira GR, Fávaro PDC, Galdioli VHG, Seneda MM, Ribeiro ELDA. Scrotal skin thickness, testicular shape and vascular perfusion using Doppler ultrasonography in bulls. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Trautwein LGC, Souza AK, Martins MIM. Can testicular artery Doppler velocimetry values change according to the measured region in dogs? Reprod Domest Anim 2019; 54:687-695. [PMID: 30685893 DOI: 10.1111/rda.13410] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 01/21/2019] [Indexed: 11/28/2022]
Abstract
Testicular tissue maintenance is performed by the testicular artery, and the hemodynamics of this artery can be evaluated using Doppler ultrasonography. The aim of this study was to characterize the peak systolic velocity (PSV), end diastolic velocity (EDV), pulsatility index (PI) and resistivity index (RI) of five regions of the testicular artery in dogs, including two proposed regions and three that have been previously described. Twenty-two dogs were used, and the PSV, EDV, PI and RI of the testicular artery were measured in five regions: proximal, medial and distal supratesticular; marginal; and intratesticular. The median values for PSV (cm/s), EDV (cm/s), PI and RI in the five regions were as follows: proximal supratesticular (23.1, 3.7, 2.1 and 0.8); medial supratesticular (17.2, 4.5, 1.5, and 0.7); distal supratesticular (12.2, 5.7, 0.8, and 0.5); marginal (11.3, 6.5, 0.5, and 0.4); and intratesticular (5.7, 3.5, 0.5, and 0.4). There was a difference between the PSV of the medial and distal supratesticular regions. There were differences in the PSV, EDV, PI and RI among the distal supratesticular, marginal and intratesticular regions. Measurements of PSV, EDV, PI and RI of the testicular artery in dogs at the proposed regions showed different results due to the hemodynamic and morphological differences of the artery during its course in the spermatic cord and to the testicles. It is necessary to identify the region in testicular artery Doppler velocimetric evaluations of dogs, given that there is a difference according to the region measured.
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Affiliation(s)
| | - Anne Kemmer Souza
- Departamento de Clínicas Veterinárias, Universidade Estadual de Londrina, Londrina, Brazil
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Monthly changes in testicular blood flow dynamics and their association with testicular volume, plasma steroid hormones profile and semen characteristics in rams. Theriogenology 2019; 123:68-73. [DOI: 10.1016/j.theriogenology.2018.09.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 09/26/2018] [Accepted: 09/26/2018] [Indexed: 11/21/2022]
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Samir H, Nyametease P, Nagaoka K, Watanabe G. Effect of seasonality on testicular blood flow as determined by color Doppler ultrasonography and hormonal profiles in Shiba goats. Anim Reprod Sci 2018; 197:185-192. [DOI: 10.1016/j.anireprosci.2018.08.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 08/08/2018] [Accepted: 08/21/2018] [Indexed: 11/29/2022]
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Bigliardi E, Denti L, De Cesaris V, Bertocchi M, Di Ianni F, Parmigiani E, Bresciani C, Cantoni AM. Colour Doppler ultrasound imaging of blood flows variations in neoplastic and non-neoplastic testicular lesions in dogs. Reprod Domest Anim 2018; 54:63-71. [DOI: 10.1111/rda.13310] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/07/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Enrico Bigliardi
- Department of Veterinary Science; University of Parma; Parma Italy
| | - Laura Denti
- Department of Veterinary Science; University of Parma; Parma Italy
| | | | - Mara Bertocchi
- Department of Veterinary Science; University of Parma; Parma Italy
| | | | | | - Carla Bresciani
- Department of Veterinary Science; University of Parma; Parma Italy
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Effect of breed on testicular blood flow dynamics in bulls. Theriogenology 2018; 118:16-21. [DOI: 10.1016/j.theriogenology.2018.05.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 05/16/2018] [Accepted: 05/18/2018] [Indexed: 11/18/2022]
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45
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Camela ESC, Nociti RP, Santos VJC, Macente BI, Murawski M, Vicente WRR, Bartlewski PM, Oliveira MEF. Changes in testicular size, echotexture, and arterial blood flow associated with the attainment of puberty in Dorper rams raised in a subtropical climate. Reprod Domest Anim 2018; 54:131-137. [PMID: 29989218 DOI: 10.1111/rda.13213] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/13/2018] [Indexed: 11/26/2022]
Abstract
There is a paucity of information on the relationships of testicular morphology, echotextural attributes, and blood flow dynamics with pubertal development of rams raised in a subtropical climate. Forty-five Dorper rams (24 rams aged 8-11 months and 21 rams aged 12-24 months) were examined using a portable ultrasound scanner connected to a 7.5-MHz transducer. Computer-assisted analyses of testicular ultrasonograms utilized commercially available Image ProPlus® analytical software. Spectral Doppler scans of testicular arteries were performed immediately after scrotal (B-mode) ultrasonography to determine peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI = [PSV-EDV]/PSV), and pulsatility index (PI = [SPV-EDV]/mean velocity) of the blood vessels. The length of the testes (9.7 ± 0.3 compared with 9.0 ± 0.2 cm) and scrotal circumference (33.3 ± 0.5 compared with 31.8 ± 0.4 cm) were greater (p < 0.05) but testicular depth (4.5 ± 0.1 compared with 4.9 ± 0.08 cm) was less (p < 0.05) in sexually mature compared with peripubertal rams. [Corrections added on 9 Jan 2019 after initial online publication: The testicular size values in the sentence were corrected.] There were no differences (p > 0.05) between the two age groups of Dorper rams in blood flow indices of testicular arteries. Mean numerical pixel values (100.5 ± 4.1 compared with 89.2 ± 4.8) and pixel heterogeneity (25.6 ± 0.6 compared with 23.6 ± 0.5) of testicular parenchyma were greater (p < 0.05) in peripubertal than in postpubertal rams. Semen volume was negatively correlated with PI of testicular arteries (r = -0.57, p = 0.04). In summary, the attainment of sexual maturity in the rams of the present study was associated with significant changes in testicular length and depth, scrotal circumference, and parenchymal echogenicity/hetrogeneity but not in testicular volume and blood perfusion rates. Testicular artery PI can be used to predict the volume of ejaculate in rams.
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Affiliation(s)
- Efigénia S C Camela
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Ricardo P Nociti
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Victor J C Santos
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Beatrice I Macente
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Maciej Murawski
- Department of Animal Biotechnology, Agricultural University of Cracow, Kraków, Poland
| | - Wilter R R Vicente
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Pawel M Bartlewski
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Maria Emilia F Oliveira
- Department of Preventative Veterinary Medicine and Animal Reproduction, School of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo, Brazil
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Rota A, Puddu B, Sabatini C, Panzani D, Lainé AL, Camillo F. Reproductive parameters of donkey jacks undergoing puberty. Anim Reprod Sci 2018; 192:119-125. [PMID: 29500053 DOI: 10.1016/j.anireprosci.2018.02.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/31/2018] [Accepted: 02/23/2018] [Indexed: 11/26/2022]
Abstract
In male donkeys, puberty and the related events have been poorly characterized. The aim of this study was to evaluate the age at which male donkeys reach puberty, and characterize age associated changes in testicular size, testicular blood flow, serum testosterone concentration and semen quality. Every two months, starting at 6 months and finishing at 24 months of age, five male donkeys born in May to July were subjected to B-mode ultrasound examination to assess testicular size and scrotum content and blood serum sampling for testosterone concentration. From the age of 8 months, pulsed Doppler was employed to evaluate blood flow in the testicular artery. Testosterone serum concentration was evaluated via RIA. From the age of 12 months, monthly semen collections were attempted and semen was evaluated for sperm number, motility and morphology. Onset of puberty was defined as the first ejaculate containing ≥50 × 106 spermatozoa with ≥10% total motility. One of the donkeys was excluded from the statistical analyses due to a hydrocele presented during the study. Testes width was affected by age (P < 0.0001) and after an initial plateau increased linearly from 10 months of age. Pulsatility and resistivity indexes were also affected by age (P < 0.01), being significantly higher at 14 months than at 24 months. Testosterone serum concentration was affected by age (P < 0.0001) and was significantly lower at 6 months (0.1 ng/ml) compared to 22-24 months (≥0.8 ng/ml). Spermatozoa appeared in the ejaculate at a mean age of 18.7 months and puberty was attained between 19 and 20 months of age (mean: 19.5 months), between January and February. In conclusion, late spring born Amiata donkey colts reached puberty at 19-20 months of age. Puberty was accompanied by changes in testicular size, testicular blood flow and serum testosterone concentration.
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Affiliation(s)
- Alessandra Rota
- Dipartimento di Scienze Veterinarie, Università di Pisa, via livornese lato monte, 56122 San Piero a Grado, PI, Italy.
| | - Battista Puddu
- Dipartimento di Scienze Veterinarie, Università di Pisa, via livornese lato monte, 56122 San Piero a Grado, PI, Italy
| | - Chiara Sabatini
- Dipartimento di Scienze Veterinarie, Università di Pisa, via livornese lato monte, 56122 San Piero a Grado, PI, Italy
| | - Duccio Panzani
- Dipartimento di Scienze Veterinarie, Università di Pisa, via livornese lato monte, 56122 San Piero a Grado, PI, Italy
| | - Anne-Lyse Lainé
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Francesco Camillo
- Dipartimento di Scienze Veterinarie, Università di Pisa, via livornese lato monte, 56122 San Piero a Grado, PI, Italy
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Gloria A, Carluccio A, Wegher L, Robbe D, Valorz C, Contri A. Pulse wave Doppler ultrasound of testicular arteries and their relationship with semen characteristics in healthy bulls. J Anim Sci Biotechnol 2018; 9:14. [PMID: 29441202 PMCID: PMC5800041 DOI: 10.1186/s40104-017-0229-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 12/28/2017] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Semen evaluation is used to estimate the testicular function. In bulls, the spermatozoa present in the ejaculate are the result of a process that begun more than 2 mo earlier, bequeathing a delayed depiction of the actual function of the testis. Since testis vascularization might be critical for the gonad function, selected pulse wave Doppler ultrasound parameters were assessed in this study, for instance the peak systolic velocity, the end diastolic velocity and the resistive index of the testicular artery along the spermatic cord, the marginal portion of the testicular artery and the intratesticular branches of the testicular artery both in healthy adult and young bulls. Correlations between these parameters and characteristics of semen that was collected numerous times, before and after the Doppler ultrasound examination. RESULTS The peak systolic velocity and the end diastolic velocity measured in the testicular artery along the spermatic cord (supratesticular artery - SA) were variable among the bulls and within individual bulls, likely due to the convoluted course of the vessel. The resistive index was found highly repeatable in the same bull. A reduction in the resistive index was found between the supratesticular artery and the marginal portion of the testicular artery (P < 0.01), and between the marginal portion of the testicular artery and the intratesticular branches of the testicular artery (P < 0.05). No differences were recorded for the pulse wave Doppler ultrasound parameters in young bulls compared with adults. A significant correlation was found between the resistive index of the marginal portion of the testicular artery and total sperm in the ejaculate (r = 0.516, P < 0.05), the immature sperm (r = 0.462, P < 0.05), the teratoid sperm (r = 0.375, P < 0.05), and the "Dag defect" sperm (r = 0.389, P < 0.05). Similarly, the resistive index of the intratesticular branches of the testicular artery were found correlated with the total sperm number in the ejaculate (r = 0.568, P < 0.05), the immature sperm (r = 0.523, P < 0.05), the teratoid sperm (r = 0.418, P < 0.05), and the "Dag defect" sperm (r = 0.341, P < 0.05). CONCLUSIONS The data presented in this study suggest that the resistive index, measured at the marginal portion of the testicular artery, could be an easy-to-perform parameter to evaluate the spermatogenesis quality in young bulls and normal adults.
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Affiliation(s)
- Alessia Gloria
- Faculty of Veterinary Medicine, University of Teramo, Località Piano D’Accio, 64100 Teramo, Italy
| | - Augusto Carluccio
- Faculty of Veterinary Medicine, University of Teramo, Località Piano D’Accio, 64100 Teramo, Italy
| | - Laura Wegher
- Provincial Breeders Federation of Trento, Via delle Bettine 40, 38121 Trento, Italy
| | - Domenico Robbe
- Faculty of Veterinary Medicine, University of Teramo, Località Piano D’Accio, 64100 Teramo, Italy
| | - Claudio Valorz
- Provincial Breeders Federation of Trento, Via delle Bettine 40, 38121 Trento, Italy
| | - Alberto Contri
- Faculty of Veterinary Medicine, University of Teramo, Località Piano D’Accio, 64100 Teramo, Italy
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48
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Ultrasonographic characteristics of accessory sex glands and spectral Doppler indices of the internal iliac arteries in peri- and post-pubertal Dorper rams raised in a subtropical climate. Anim Reprod Sci 2017; 184:29-35. [DOI: 10.1016/j.anireprosci.2017.06.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 06/19/2017] [Accepted: 06/21/2017] [Indexed: 11/24/2022]
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Ortiz-Rodriguez JM, Anel-Lopez L, Martín-Muñoz P, Álvarez M, Gaitskell-Phillips G, Anel L, Rodríguez-Medina P, Peña FJ, Ortega Ferrusola C. Pulse Doppler ultrasound as a tool for the diagnosis of chronic testicular dysfunction in stallions. PLoS One 2017; 12:e0175878. [PMID: 28558006 PMCID: PMC5448730 DOI: 10.1371/journal.pone.0175878] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 03/31/2017] [Indexed: 01/07/2023] Open
Abstract
Testicular function is particularly susceptible to vascular insult, resulting in a negative impact on sperm production and quality of the ejaculate. A prompt diagnosis of testicular dysfunction enables implementation of appropriate treatment, hence improving fertility forecasts for stallions. The present research aims to: (1) assess if Doppler ultrasonography is a good tool to diagnose stallions with testicular dysfunction; (2) to study the relationship between Doppler parameters of the testicular artery and those of sperm quality assessed by flow cytometry and (3) to establish cut off values to differentiate fertile stallions from those with pathologies causing testicular dysfunction. A total of 10 stallions (n: 7 healthy stallions and n: 3 sub-fertile stallions) were used in this study. Two ejaculates per stallion were collected and preserved at 5°C in a commercial extender. The semen was evaluated at T0, T24 and T48h by flow cytometry. Integrity and viability of sperm (YoPro®-1/EthD-1), mitochondrial activity (MitoTracker® Deep Red FM) and the DNA fragmentation index (Sperm Chromatin Structure Assay) were assessed. Doppler parameters were measured at three different locations on the testicular artery (Supratesticular artery (SA); Capsular artery (CA) and Intratesticular artery (IA)). The Doppler parameters calculated were: Resistive Index (RI), Pulsatility Index (PI), Peak Systolic Velocity (PSV), End Diastolic Velocity (EDV), Time Average Maximum Velocity (TAMV), Total Arterial Blood Flow (TABF) and TABF rate. The capsular artery was the most reliable location to carry out spectral Doppler assessment, since blood flow parameters of this artery were most closely correlated with sperm quality parameters. Significant differences in all the Doppler parameters studied were observed between fertile and subfertile stallions (p ≤ 0.05). The principal components analysis assay determined that fertile stallions are characterized by high EDV, TAMV, TABF and TABF rate values (high vascular perfusion). In contrast, subfertile stallions tend to present high values of PI and RI (high vascular resistance). The ROC curves revealed that the best Doppler parameters to predict sperm quality in stallions were: Doppler velocities (PSV, EDV and TAMV), the diameter of the capsular artery and TABF parameters (tissue perfusion parameters). Cut off values were established using a Youden´s Index to identify fertile stallions from stallions with testicular dysfunction. Spectral Doppler ultrasound is a good predictive tool for sperm quality since correlations were determined among Doppler parameters and markers of sperm quality. Doppler ultrasonography could be a valuable diagnostic tool for use by clinical practitioners for the diagnosis of stallions with testicular dysfunction and could be a viable alternative to invasive procedures traditionally used for diagnosis of sub-fertility disorders.
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Affiliation(s)
- Jose M. Ortiz-Rodriguez
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Luis Anel-Lopez
- Department of Animal Medicine, Surgery and Veterinary Anatomy, University of León, León, Spain
| | - Patricia Martín-Muñoz
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Mercedes Álvarez
- Department of Animal Medicine, Surgery and Veterinary Anatomy, University of León, León, Spain
| | - Gemma Gaitskell-Phillips
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Luis Anel
- Department of Animal Medicine, Surgery and Veterinary Anatomy, University of León, León, Spain
| | | | - Fernando J. Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
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Wang J, Tan J, Luo J, Huang P, Zhou W, Chen L, Long L, Zhang LM, Zhu B, Yang L, Deng DYB. Enhancement of scutellarin oral delivery efficacy by vitamin B12-modified amphiphilic chitosan derivatives to treat type II diabetes induced-retinopathy. J Nanobiotechnology 2017; 15:18. [PMID: 28249594 PMCID: PMC5333415 DOI: 10.1186/s12951-017-0251-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 02/10/2017] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Diabetic retinopathy is the most common complication in diabetic patients relates to high expression of VEGF and microaneurysms. Scutellarin (Scu) turned out to be effective against diabetes related vascular endothelial cell dysfunction. However, its clinical applications have been limited by its low bioavailability. In this study, we formulated and characterized a novel intestinal target nanoparticle carrier based on amphiphilic chitosan derivatives (Chit-DC-VB12) loaded with scutellarin to enhance its bioavailability and then evaluated its therapeutic effect in experimental diabetic retinopathy model. RESULTS Chit-DC-VB12 nanoparticles showed low toxicity toward the human colon adenocarcinoma (Caco-2) cells and zebra fish within concentration of 250 μg/ml, owing to good biocompatibility of chitosan. The scutellarin-loaded Chit-DC-VB12 nanoparticles (Chit-DC-VB12-Scu) were then prepared by self-assembly in aqueous solution. Scanning electron microscopy and dynamic light scattering analysis indicated that the Chit-DC-VB12-Scu nanoparticles were spherical particles in the sizes ranging from 150 to 250 nm. The Chit-DC-VB12-Scu nanoparticles exhibited high permeation in Caco-2 cell, indicated it could be beneficial to be absorbed in humans. We also found that Chit-DC-VB12 nanoparticles had a high cellular uptake. Bioavailability studies were performed in Sprague-Dawley rats, which present the area under the curve of scutellarin of Chit-DC-VB12-Scu was two to threefolds greater than that of free scutellarin alone. Further to assess the therapeutic efficacy of diabetic retinopathy, we showed Chit-DC-VB12-Scu down-regulated central retinal artery resistivity index and the expression of angiogenesis proteins (VEGF, VEGFR2, and vWF) of retinas in type II diabetic rats. CONCLUSIONS Chit-DC-VB12 nanoparticles loaded with scutellarin have better bioavailability and cellular uptake efficiency than Scu, while Chit-DC-VB12-Scu nanoparticles alleviated the structural disorder of intraretinal neovessels in the retina induced by diabetes, and it also inhibited the retinal neovascularization via down-regulated the expression of angiogenesis proteins. In conclusion, the Chit-DC-VB12 nanoparticles enhanced scutellarin oral delivery efficacy and exhibited potential as small intestinal target promising nano-carriers for treatment of type II diabetes induced-retinopathy.
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Affiliation(s)
- Jingnan Wang
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Jiayun Tan
- Department of Polymer and Material Science, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou, 510275, China
| | - Jiahao Luo
- Department of Polymer and Material Science, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou, 510275, China
| | - Peilin Huang
- Institute of Biomaterial, Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Wuyi Zhou
- Institute of Biomaterial, Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | | | - Lingli Long
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Li-Ming Zhang
- Department of Polymer and Material Science, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou, 510275, China
| | - Banghao Zhu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China
| | - Liqun Yang
- Department of Polymer and Material Science, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-sen University, Guangzhou, 510275, China.
| | - David Y B Deng
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China. .,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
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