Publications by authors named "Tan V Le"

Article Synopsis
  • Non-obstructive azoospermia (NOA) is a prevalent and complex issue with varied treatment options and no definitive guidelines, leading to differing management practices internationally.
  • A comprehensive survey with 336 responses from specialists in 49 countries explored current medical and surgical strategies for NOA, analyzing results against existing guidelines and offering expert recommendations.
  • Key findings included diverse approaches to hormonal therapy, significant variation in sperm retrieval success rates, and differing protocols around varicocele repair and follicle-stimulating hormone cutoff levels for sperm retrieval.
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  • * Conducted from July to September 2022, a questionnaire gathered responses from 367 doctors in 49 countries, focusing on how they diagnose NOA through methods like hormone tests and genetic analyses.
  • * The survey identified that while many practices align with guidelines, significant differences in approaches were found, underscoring the need for standardized, evidence-based international guidelines for NOA evaluation.
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  • This systematic review and meta-analysis investigates whether varicocele repair (VR) can lower sperm DNA fragmentation (SDF) and seminal oxidative stress (measured by malondialdehyde or MDA) in infertile men.
  • An analysis of 29 studies involving 1,491 men shows a significant reduction in SDF post-VR, regardless of the surgical technique used and the method of SDF testing.
  • The findings also indicate a notable decrease in seminal MDA levels following VR, supporting the effectiveness of varicocele repair in improving reproductive parameters in affected men.
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  • The study investigates global practices and challenges in using sperm DNA fragmentation (SDF) assays, which can affect male reproductive potential, as outlined in the latest WHO manual.
  • A survey of 436 reproductive clinicians revealed that the most popular SDF assay is TUNEL, with a significant influence from availability on their choices.
  • Clinicians see the value of SDF testing in understanding infertility but face barriers like insufficient professional guidelines and a lack of accepted reference values for interpreting SDF results.
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  • The meta-analysis investigates the effects of varicocele repair on semen parameters in infertile males, combining data from diverse studies without language restrictions.
  • A total of 351 studies were analyzed, revealing significant improvements in several semen parameters post-repair, including semen volume, sperm concentration, total sperm count, motility, and morphology, while sperm vitality showed no improvement.
  • This research is the largest of its kind and highlights the benefits of varicocele repair for male infertility, contributing valuable insights for clinical practice.
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Article Synopsis
  • The study investigates global practices for managing sperm DNA fragmentation (SDF) in infertile men, highlighting its impact on fertility and assisted reproductive technology (ART).
  • A survey collecting data from 436 reproductive experts across 55 countries revealed a common recommendation for lifestyle changes and antioxidants, with varying durations for treatment and differing management approaches for specific infertility cases.
  • The findings indicate a lack of uniformity in practices, emphasizing the need for standardized guidelines and expert consensus for treating men with elevated SDF.
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Purpose: Despite the significant role of varicocele in the pathogenesis of male infertility, the impact of varicocele repair (VR) on conventional semen parameters remains controversial. Only a few systematic reviews and meta-analyses (SRMAs) have evaluated the impact of VR on sperm concentration, total motility, and progressive motility, mostly using a before-after analytic approach. No SRMA to date has evaluated the change in conventional semen parameters after VR compared to untreated controls.

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Purpose: Varicocele is a common problem among infertile men. Varicocele repair (VR) is frequently performed to improve semen parameters and the chances of pregnancy. However, there is a lack of consensus about the diagnosis, indications for VR and its outcomes.

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We report a new pathway to synthesize pyrano[2,3-]pyrazoles and their binding mode to p38 MAP kinase. Pyrano[2,3-]pyrazole derivatives have been prepared through a four-component reaction of benzyl alcohols, ethyl acetoacetate, phenylhydrazine, and malononitrile in the presence of sulfonated amorphous carbon and eosin Y as catalysts. All products were characterized by melting point, H and C NMR, and HRMS (ESI).

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Purpose: The success of vasectomy is determined by the outcome of a post-vasectomy semen analysis (PVSA). This article describes a step-by-step procedure to perform PVSA accurately, report data from patients who underwent post vasectomy semen analysis between 2015 and 2021 experience, along with results from an international online survey on clinical practice.

Materials And Methods: We present a detailed step-by-step protocol for performing and interpretating PVSA testing, along with recommendations for proficiency testing, competency assessment for performing PVSA, and clinical and laboratory scenarios.

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Antisperm antibodies (ASA), as a cause of male infertility, have been detected in infertile males as early as 1954. Multiple causes of ASA production have been identified, and they are due to an abnormal exposure of mature germ cells to the immune system. ASA testing (with mixed anti-globulin reaction, and immunobead binding test) was described in the WHO manual 5th edition and is most recently listed among the extended semen tests in the WHO manual 6th edition.

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Article Synopsis
  • * Differentiating between asthenozoospermia (low sperm motility) and necrozoospermia (low sperm vitality) is crucial for diagnosing and treating infertility, as their causes can be local or systemic.
  • * A global survey was conducted to assess current practices regarding sperm vitality testing and necrozoospermia management, aiming to create a standard approach for diagnosis and treatment in clinical settings.
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Introduction: Although testosterone replacement therapy is an effective treatment for hypogonadism, there are safety concerns regarding potential cardiovascular risks and fertility preservation.

Objective: To assess the effect of selective estrogen receptor modulator (SERM), aromatase inhibitor, and human chorionic gonadotropin (hCG) on total testosterone (TT) levels and hypogonadism.

Methods: We performed a systematic literature review from 1987 to 2019 via PubMed, Cochrane review, and Web of Science.

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  • - A cluster of 44 COVID-19 cases in Vietnam, imported from Europe, was analyzed between March 6 and April 15, 2020, with a majority of patients showing symptoms like dry cough and fever upon admission.
  • - The majority of cases were Vietnamese and were primarily linked to travel from the UK and other European nations, with no cases reported from China.
  • - Genetic analysis revealed that the viruses from these patients shared high similarity with the Wuhan reference strain and included notable mutations tied to European variants, though no new mutations were linked to increased disease severity.
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Sildenafil has had a dramatic influence on the field of sexual medicine over the past 20 years. Not only have phosphodiesterase-5 (PDE5) inhibitors improved the treatment of erectile dysfunction (ED), they have indirectly contributed to the treatment of male factor infertility. A review of the literature between 1998 - 2018 was performed using PubMed with regards to sildenafil and male infertility.

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Introduction: Peyronie's disease (PD) is a debilitating condition that affects a sizable number of men worldwide. Current treatment options consist of oral therapy, intralesional injections, and surgery. Penile stretching has been used as a treatment for PD, including penile traction therapy (PTT) and vacuum erection devices (VEDs), with numerous trials completed or underway.

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Erectile dysfunction (ED) is one of the most common complaints encountered by the practicing urologist, particularly when treating older men. The last 20 years have represented a pivotal time in the treatment of ED. Areas covered: Several pharmacologic agents have been approved by regulatory agencies, including phosphodiesterase type 5 (PDE5) inhibitors, intraurethral suppositories, and vasoactive injectable agents.

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Background: Priapism has been linked to many commonly prescribed medications, as well as recreational drugs and toxins. Although the incidence of priapism as a result of medication is small, the increasing use of antidepressants, antipsychotics, and recreational drugs may lead to more cases of pharmacologically-induced priapism in the future.

Aim: To provide a comprehensive, up-to-date review of the most common causes of pharmacologically induced priapism and discuss incidence, pathophysiology, and basic management strategies.

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Article Synopsis
  • The male genitalia can have a variety of dermatological conditions, which can range from benign to potentially malignant, but many physicians lack proper training to diagnose these issues effectively.
  • The goal of the study is to equip sexual medicine physicians with the resources needed to evaluate and diagnose skin conditions affecting the genital area.
  • The research categorizes these conditions into five groups to highlight their prevalence and characteristics, emphasizing the importance of monitoring and appropriate treatment for both benign and malignant lesions.
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This paper critically reviews the current evidence of research in biomedical applications of selenium nanoparticles (SeNPs) and their effects at cellular and tissue levels. In recent years, interest in SeNPs as a natural trace element nanomaterial for nanomedicine has resulted in a number of studies evaluating their bioactivities, such as anticancer, antimicrobial, and antioxidant properties. Significant data have been generated to demonstrate the effectiveness of SeNPs alone or in combination with other reagents.

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Absorbed dose rates in air from natural radionuclides were measured by a car-borne survey in southern Vietnam. The mean absorbed dose rate in air for southern Vietnam, which consists of the south-east region and the Mekong River Delta region, was 64 ± 18 nGy h-1, while rates for the two regions were 61 ± 17 and 66 ± 19 nGy h-1, respectively. These dose rates were respectively 1.

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Background: Hand, foot and mouth disease (HFMD) has become a major public health problem across the Asia-Pacific region, and is commonly caused by enterovirus A71 (EV-A71) and coxsackievirus A6 (CV-A6), CV-A10 and CV-A16. Generating pathogen whole-genome sequences is essential for understanding their evolutionary biology. The frequent replacements among EV serotypes and a limited numbers of available whole-genome sequences hinder the development of overlapping PCRs for whole-genome sequencing.

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Heiman Wertheim and colleagues describe the diagnosis and management of two patients who developed rabies after butchering and consuming a dog or a cat.

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