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Urology Case Reports Nov 2023We report an exceedingly rare case of Klippel-Feil syndrome (KFS), compounded by ipsilateral absence of the vas deferens, renal agenesis, and diaphragmatic hernia....
We report an exceedingly rare case of Klippel-Feil syndrome (KFS), compounded by ipsilateral absence of the vas deferens, renal agenesis, and diaphragmatic hernia. Unilateral absence of the vas deferens was found incidentally during orchidopexy. To the best of our knowledge, no case of unilateral absence of the kidney and vas deferens has been reported in children with KFS.
PubMed: 37965125
DOI: 10.1016/j.eucr.2023.102600 -
Basic and Clinical Andrology Nov 2023Since the release of the combined oral contraceptive pill in 1960, women have shouldered the burden of contraception and family planning. Over 60 years later, this is... (Review)
Review
BACKGROUND
Since the release of the combined oral contraceptive pill in 1960, women have shouldered the burden of contraception and family planning. Over 60 years later, this is still the case as the only practical, effective contraceptive options available to men are condoms and vasectomy. However, there are now a variety of promising hormonal and non-hormonal male contraceptive options being studied. The purpose of this narrative review is to provide clinicians and laypeople with focused, up-to-date descriptions of novel strategies and targets for male contraception. We include a cautiously optimistic discussion of benefits and potential drawbacks, highlighting several methods in preclinical and clinical stages of development.
RESULTS
As of June 2023, two hormonal male contraceptive methods are undergoing phase II clinical trials for safety and efficacy. A large-scale, international phase IIb trial investigating efficacy of transdermal segesterone acetate (Nestorone) plus testosterone gel has enrolled over 460 couples with completion estimated for late 2024. A second hormonal method, dimethandrolone undecanoate, is in two clinical trials focusing on safety, pharmacodynamics, suppression of spermatogenesis and hormones; the first of these two is estimated for completion in December 2024. There are also several non-hormonal methods with strong potential in preclinical stages of development.
CONCLUSIONS
There exist several hurdles to novel male contraception. Therapeutic development takes decades of time, meticulous work, and financial investment, but with so many strong candidates it is our hope that there will soon be several safe, effective, and reversible contraceptive options available to male patients.
PubMed: 37940863
DOI: 10.1186/s12610-023-00204-z -
Naunyn-Schmiedeberg's Archives of... May 20246-Nitrodopamine (6-ND) is released from human vas deferens and plays a modulatory role in the male ejaculation. Therapeutical use of α-adrenoceptor antagonists is...
6-Nitrodopamine (6-ND) is released from human vas deferens and plays a modulatory role in the male ejaculation. Therapeutical use of α-adrenoceptor antagonists is associated with ejaculatory abnormalities. To evaluate the effect of α-adrenoceptor antagonists on the contractions induced by 6-ND, dopamine, noradrenaline, and adrenaline in the human epididymal vas deferens (HEVD). HEVD strips were suspended in glass chambers containing heated and oxygenated Krebs-Henseleit's solution. Cumulative concentration-response curves to catecholamines (10 nM-300 μM) were constructed in HEVD strips pre-incubated (30 min) with doxazosin (0.1-1 nM), tamsulosin (1-10 nM), prazosin (10-100 nM) and/or silodosin (0.1-10 nM). The effects of these α-adrenoceptor antagonists were also evaluated in the electric-field stimulation (EFS, 2-32 Hz)-induced contractions. Doxazosin (0.1 nM) caused significant reductions in 6-ND-induced HEVD contractions without affecting the contractions induced by dopamine, noradrenaline, and adrenaline. Similar results were observed with tamsulosin (1 nM) and prazosin (10 nM). At these concentrations, these α-adrenoceptor antagonists largely reduced the EFS-induced contractions. Silodosin (1 nM) caused concentration-dependent rightward shifts of the concentration-response curves to 6-ND but had no effect on the contractions induced by dopamine and adrenaline. Silodosin (0.1 nM) only inhibited the contractions induced by noradrenaline. Silodosin at 1 nM, but not at 0.1 nM, caused significant reductions in the EFS-induced contractions. The results reinforce the concept that 6-ND plays a major role in the human vas deferens contractility and indicate that the ejaculation disorders caused by doxazosin, tamsulosin, prazosin and silodosin cause in man, may be due to inhibition of the contractions induced by 6-ND rather than by the classical catecholamines dopamine, noradrenaline, and adrenaline.
Topics: Male; Humans; Vas Deferens; Adrenergic alpha-1 Receptor Antagonists; Muscle Contraction; Epinephrine; In Vitro Techniques; Norepinephrine; Dose-Response Relationship, Drug; Doxazosin; Middle Aged; Adult; Prazosin; Tamsulosin; Dopamine; Electric Stimulation; Indoles; Aged; Sulfonamides
PubMed: 37910185
DOI: 10.1007/s00210-023-02805-x -
World Journal of Urology Dec 2023Vasovasostomy is used to correct vas deferens (VD) transections encountered during surgery or to reverse sterilization vasectomies. Achieving vasal patency is the...
PURPOSE
Vasovasostomy is used to correct vas deferens (VD) transections encountered during surgery or to reverse sterilization vasectomies. Achieving vasal patency is the primary goal and the success is assessed on various factors including VD patency, flow rates, and pregnancy rates. While preserving vas motility is not a major concern in surgical practice, it is worth noting that VD has peristaltic activity which plays crucial role during ejaculation. Any disruption in its motility could potentially lead to negative outcomes in the future. We conducted an experimental study to assess vas motility changes following vasovasostomy.
METHODS
The study was approved by Gazi University, Animals Ethic Committee. Twenty-four rats were allocated to four groups. Left-sided VD was harvested in control group (Gr1). The rest of the animals were subjected to transection of VD. Gr2 and 3 underwent microscopic and macroscopic anastomosis, respectively, while Gr4 underwent vasal approximation. After 12 weeks, all left-sided VD were resected, electrical field stimulation (EFS) and exogenous drugs were applied to induce contractions. Statistical analyses were performed and p value < 0.05 was regarded as statistically significant.
RESULTS
The first and second phases of EFS-induced contractile responses(CR) increased for Gr3 and decreased for Gr4 at submaximal and maximal frequencies. An increase only at maximal frequency for second phase EFS-induced CR was encountered for Gr2. α-β-methylene-ATP-induced CR decreased for Gr3 and 4. Noradrenaline-induced CR increased for Gr2, and 3 and decreased for Gr4.
CONCLUSION
The results suggest that vasovasostomy performed using a surgical technique that minimizes disruption or damage to VD may have a favorable impact on motility.
Topics: Humans; Male; Rats; Animals; Vas Deferens; Vasovasostomy; Pelvis; Electric Stimulation; Norepinephrine
PubMed: 37880539
DOI: 10.1007/s00345-023-04668-6 -
Biological Research Oct 2023In vitro incubation of epididymal and vas deferens sperm with Mn induces Sperm Chromatin Fragmentation (SCF), a mechanism that causes double-stranded breaks in...
BACKGROUND
In vitro incubation of epididymal and vas deferens sperm with Mn induces Sperm Chromatin Fragmentation (SCF), a mechanism that causes double-stranded breaks in toroid-linker regions (TLRs). Whether this mechanism, thought to require the participation of topoisomerases and/or DNAses and thus far only described in epididymal mouse sperm, can be triggered in ejaculated sperm is yet to be elucidated. The current study aimed to determine if exposure of pig ejaculated sperm to divalent ions (Mn and Mg) activates SCF, and whether this has any impact on sperm function and survival. For this purpose, sperm DNA integrity was evaluated through the Comet assay and Pulsed Field Gel Electrophoresis (PFGE); sperm motility and agglutination were assessed with computer assisted sperm analysis (CASA); and sperm viability and levels of total reactive oxygen species (ROS) and superoxides were determined through flow cytometry.
RESULTS
Incubation with Mn/Ca activated SCF in a dose-dependent (P < 0.05) albeit not time-dependent manner (P > 0.05); in contrast, Mg/Ca only triggered SCF at high concentrations (50 mM). The PFGE revealed that, when activated by Mn/Ca or Mg/Ca, SCF generated DNA fragments of 33-194 Kb, compatible with the size of one or multiple toroids. Besides, Mn/Ca affected sperm motility in a dose-dependent manner (P < 0.05), whereas Mg/Ca only impaired this variable at high concentrations (P < 0.05). While this effect on motility was concomitant with an increase of agglutination, neither viability nor ROS levels were affected by Mn/Ca or Mg/Ca treatments.
CONCLUSION
Mn/Ca and Mn/Ca were observed to induce SCF in ejaculated sperm, resulting in DNA cleavage at TLRs. The activation of this mechanism by an intracellular, non-oxidative factor sheds light on the events taking place during sperm cell death.
Topics: Male; Mice; Animals; Swine; Chromatin; Reactive Oxygen Species; Semen; Sperm Motility; Spermatozoa; DNA; DNA Fragmentation
PubMed: 37876007
DOI: 10.1186/s40659-023-00467-w -
Asian Journal of Endoscopic Surgery Jan 2024Laparoscopic percutaneous extraperitoneal closure (LPEC) is an alternative to open repair for pediatric inguinal hernias; however, its application for boys remains...
INTRODUCTION
Laparoscopic percutaneous extraperitoneal closure (LPEC) is an alternative to open repair for pediatric inguinal hernias; however, its application for boys remains controversial. In this study, we developed a technique to enhance the safety and feasibility of LPEC.
MATERIAL AND SURGICAL TECHNIQUE
In our technique, forceps are used to pull up the peritoneum ahead on the route, creating a space between the peritoneum and structures, including gonadal vessels and vas deferens. This potentially decreases the risk of perioperative injury of these structures. This technique also allows the needle to pass on the shortest course around the inguinal ring without crossing the vas deferens, possibly lowering the likelihood of injury and preventing excessively high ligation of the vaginalis process.
DISCUSSION
Our technique diversifies the LPEC methods, thereby augmenting the feasibility and safety of the procedure.
Topics: Male; Child; Humans; Infant; Hernia, Inguinal; Treatment Outcome; Herniorrhaphy; Laparoscopy; Surgical Instruments; Retrospective Studies
PubMed: 37853982
DOI: 10.1111/ases.13250 -
Annales de Pathologie Mar 2024
Topics: Male; Humans; Vas Deferens; Pelvis
PubMed: 37839994
DOI: 10.1016/j.annpat.2023.09.007 -
Progres En Urologie : Journal de... Dec 2023New methods of male contraception are being studied: male hormonal contraception, reversible occlusion of the vas deferens and thermal contraception. This study aimed to...
INTRODUCTION
New methods of male contraception are being studied: male hormonal contraception, reversible occlusion of the vas deferens and thermal contraception. This study aimed to evaluate the acceptability of these methods among men.
MATERIAL AND METHODS
We carried out an opinion survey from July to November 2021, through an anonymous questionnaire distributed in France on the internet. The subjects were adult, heterosexual men.
RESULTS
Of the 1545 connections to the questionnaire, we analyzed the 905 complete questionnaires. Seventy three percent of men say they are in favor of adopting an innovative male contraceptive method as their primary contraception: 64% in favor of reversible occlusion of the vas deferens, 22% in favor of male hormonal contraception and 13% in favor of thermal contraception.
CONCLUSION
Despite its limitations, this study shows that a significant part of the male population is interested in innovative methods of contraception that concern them. This should encourage continued research in this area.
Topics: Adult; Humans; Male; Heterosexuality; Contraception; France
PubMed: 37806909
DOI: 10.1016/j.purol.2023.09.022 -
Journal of Biochemistry Dec 2023Some aquatic invertebrates contain free d-alanine. We previously showed copious amounts of free d-glutamate, a novel d-amino acid, in the tissue of the male reproductive...
Some aquatic invertebrates contain free d-alanine. We previously showed copious amounts of free d-glutamate, a novel d-amino acid, in the tissue of the male reproductive organs of Marsupenaeus japonicus. Herein, we clarified the distribution and potential role of d-glutamate and d-alanine in male reproductive tissues, namely the testis, vas deferens and seminal receptacle at different growth stages of M. japonicus. The percentage of d-glutamate to total glutamate was over 50% in these tissues. In particular, the content of d-glutamate was the most abundant in the vas deferens, the ratio of d-glutamate to total glutamate was approximately 80%. In contrast, d-alanine content was the lowest in the vas deferens among these tissues. d-Glutamate content was the highest when the prawn weighed 12 g, indicating that d-glutamate is actively synthesized in the younger stage. Our findings suggest that d-glutamate plays an important role in the reproductive functions of M. japonicus.
Topics: Animals; Male; Amino Acids; Glutamic Acid; Alanine; Penaeidae
PubMed: 37787512
DOI: 10.1093/jb/mvad072