European Association of Urology Guidelines on Sexual and Reproductive Health-2021 Update: Male Sexual Dysfunction

A novel strategy to induce penile erection during penile doppler ultrasound: oral sildenafil administration plus alprostadil injection

OBJECTIVES

To evaluate the efficacy of a novel approach to achieve the optimal penile erection during the penile doppler ultrasound (PDU) examination, which was oral sildenafil combined alprostadil injection.

MATERIALS AND METHODS

A total of 60 ED patients were enrolled in our prospective study, and they were randomly assigned to two group with different PDU order. The approaches assisted the PDU included two models, mode A meaning injection of 15 μg alprostadil and model B meaning oral sildenafil 100 mg plus injection of 15 μg alprostadil. The PDU parameters were measured continuously before induced erection, and 5, 10, 15, 20, 25 min.

RESULTS

Each group included 30 ED patients with similar clinical characteristics. After pooling the results together, the PSV, EDV, and RI were all improved significantly, when adding the oral sildenafil administration to assist PDU. Also, the clinical response of oral sildenafil administration plus alprostadil injection was better than that in alprostadil injection alone (p = 0.016). The arterial ED were decreased from 31.67% to 15.00% with the P value 0.031, and the mixed ED was also decreased statistically (23.33% vs 8.33%, p = 0.024).

CONCLUSION

Oral sildenafil administration plus alprostadil injection could improve the diagnostic accuracy of PDU.

The efficacy of platelet rich plasma in the treatment of erectile dysfunction: a systematic review and meta-analysis of randomized controlled trials

BACKGROUND

Erectile dysfunction (ED) is a common issue among males, and the use of platelet-rich plasma (PRP) therapy for treating ED has gained increasing attention, but there is still no conclusive evidence regarding its efficacy.

AIM

To evaluate the efficacy of PRP therapy for ED.

METHODS

We systematically searched PubMed, Embase, Cochrane Library, and Web of Science databases up to November 2023 to identify randomized controlled trials (RCTs) on PRP therapy for ED. We used Review Manager version 5.4 for data analysis and management.

RESULT

After applying inclusion and exclusion criteria for screening, a total of 4 studies involving 413 patients were finally included in our meta-analysis. According to our analysis, the PRP group showed significant advantages over the placebo group in terms of MCID at the first month (p = 0.03) and sixth months (p = 0.008), while there was no significant difference between the two groups at the third month (p = 0.19). Additionally, in terms of IIEF, PRP showed significantly better efficacy than placebo at the first, third, and sixth months (p < 0.00001).

CONCLUSIONS

PRP shows more effectiveness in treating ED compared to placebo, offering hope as a potential alternative treatment for ED.

Association of lifestyle and occupational exposure factors with human semen quality: a cross-sectional study of 1060 participants

The incidence of male infertility (MI) is rising annually. However, the lifestyle and occupational exposure factors contributing to MI remain incompletely understood. This study explored the effects of self-reported lifestyle and occupational exposure factors on semen quality. Among 1060 subjects invited to participate, 826 were eligible. The participants' general characteristics, lifestyle, and occupational exposure factors were collected immediately before or after semen evaluation through an online questionnaire. Initially, univariate analysis was used to investigate the relationship between the abovementioned factors and semen quality. The results indicated significant associations between low semen quality and various factors, including age, BMI, infertility type and duration, abstinence time, semen and sperm parameters, smoking, alcohol consumption, irregular sleep habits, and frequent exposure to high temperatures and chemicals at work (p < 0.05). Then, multivariate analysis was conducted to identify factors independently associated with low semen quality. Adjustment for relevant confounders was achieved by including factors with a p-value < 0.25 from univariate analyses as covariates in the binomial and ordered logistic regression models. The results suggested that alcohol consumption was a positive factor for sperm concentration (odds ratio [OR] = 0.60; 95% confidence interval [CI] = 0.36-0.99; p = 0.045). The groups with a BMI ≥ 24 and <28 kg/m2 showed a significant decrease in sperm progressive motility when compared to the reference group (BMI < 24 kg/m2) (OR = 0.63; 95% CI = 0.46-0.87, p = 0.005). In addition, the groups that drank green tea <1 time/week (OR = 1.52, 95% CI = 1.05-2.2) and 1-4 times/week (OR = 1.61, 95% CI = 1.02-2.54) exhibited significantly increased sperm DFI values compared with the group that drank green tea 5-7 times/week. In conclusion, these findings underscore the importance of maintaining a normal weight and regularly consuming green tea for men.

Oncological microdissection testicular sperm extraction (Onco-microTESE) outcomes for fertility preservation of patients with testicular cancer with azoospermia or severe oligoasthenoteratozoospermia

OBJECTIVE

To determine the success rate of oncological microdissection testicular sperm extraction (onco-microTESE) in patients with testicular cancer (TC) with azoospermia and severe oligoasthenoteratozoospermia (OAT; <1 million/mL sperm) and to explore any factors that may predict success.

PATIENTS AND METHODS

Case series of outcomes from all consecutive patients (42 testes in 38 patients) that presented or were referred to a single specialist tertiary referral centre for fertility management in the context of TC with severe OAT or azoospermia between August 2015 and August 2022. Biochemical, radiological, and histological parameters were collected for all patients. All patients underwent onco-microTESE (simultaneous radical inguinal orchidectomy with ex vivo microTESE of the affected testis). Those with unsuccessful surgical sperm retrieval (SSR) from the affected testis underwent contemporaneous contralateral microTESE, if no contraindication was present. The primary outcome was successful SSR from the affected testicle sufficient for assisted reproductive techniques. Secondary outcomes included contralateral microTESE success, the time from referral to procedure, and the total successful fertility preservation rate.

RESULTS

Initial onco-microTESE was successful in 19 of 31 patients (61%) with azoospermia. Contralateral microTESE was successful in a further two of eight patients with azoospermia with failed onco-microTESE. Overall, 22/31 patients with azoospermia (71%) had successful fertility preservation in this series. In addition, six of seven patients with severe OAT had further sperm harvested by onco-microTESE to maximise their fertility preservation. All surgery was performed within median (interquartile range) of 7 (5-13) days from presentation.

CONCLUSIONS

Onco-microTESE represents an effective method of fertility preservation for sub-fertile patients with TC without delaying oncological treatment. Knowledge of the fertility status at first presentation is essential to allow for such additional options for optimal fertility preservation in TC.

Management of Post-RALP SUI and ED - What are and What Should we be Doing?

PURPOSE OF REVIEW

Although there have been advancements in minimally invasive surgical techniques for radical prostatectomy, surgery can still significantly impact continence and erectile function (EF), resulting in considerable quality-of-life impairment. This review critically evaluates existing treatment options for male stress urinary incontinence (SUI) and erectile dysfunction (ED) post-robotic-assisted laparoscopic prostatectomy (RALP), alongside exploring emerging trends and discussing future directions for managing and preventing both conditions.

RECENT FINDINGS

Patient history is pivotal in guiding surgical decisions, with the intensity of symptoms and their impact on the patient's life being primary influences for deciding the best treatment options for both SUI and ED. Penile rehabilitation strategies (PR) show promise in mitigating the effects of prostate cancer treatments on EF and improving overall health, though consensus is lacking on specific programs or initiation of timing for optimal recovery post-surgery. All patients undergoing RALP should receive preoperative counseling about SUI and early pelvic floor physical therapy. Fixed and adjustable slings effectively treat mild-to-moderate post-RALP SUI, while the artificial urinary sphincter is the gold standard for men with moderate or severe SUI. EF recovery after RALP faces obstacles such as patient characteristics, compliance, and cost, with no standardized PR approach. Future research should prioritize studies aiming to optimize treatment methods and enhance patient compliance.

Pharmacist supply of non-prescription sildenafil in Norway: a simulated patient mixed-method study

BACKGROUND

Pharmacist supply of non-prescription sildenafil was initiated in Norway in 2019, and continuous evaluation of the service is warranted.

OBJECTIVES

To map how the service checklist is used, evaluate the counselling and information given in consultations, get an insight into pharmacist assessments during consultations, and explore the pharmacists' experiences with the service.

METHODS

A mixed-method approach of simulated patient visits with feedback combined with qualitative interviews was used. One 24-year-old simulated patient visited pharmacies requesting sildenafil in a scenario that ended before purchase. Visits were audio-recorded and evaluated. Post-visit, pharmacists were invited to get feedback and participate in an audio-recorded interview. Visits, feedback, and interviews were transcribed and analysed by descriptive statistics and systematic text condensation.

KEY FINDINGS

Of 39 visits, 26 were analysed and 13 were excluded because the pharmacists did not give consent. Six (23%) pharmacists asked all the checklist questions, while 15 (58%) asked some of them. None of the pharmacists provided all the guideline counselling points. The counselling most provided was 'See your general practitioner within 6 months for a health check' (N = 7, 27%). Interviews (N = 19) elicited that pharmacists assessed the patients, with adaptations in the use of the checklist. Several barriers affecting the service were identified, including time pressure, pharmacist competence, and the task being uncomfortable and challenging.

CONCLUSIONS

Most pharmacists did not completely adhere to the mandatory checklist on non-prescription sildenafil and the counselling and information given were limited. The pharmacy sector must increase awareness of how best to assess and manage patients requesting non-prescription sildenafil.

Age-related testosterone decline: mechanisms and intervention strategies

Contemporary societies exhibit delayed reproductive age and increased life expectancy. While the male reproductive system demonstrates relatively delayed aging compared to that of females, increasing age substantially impacts its function. A characteristic manifestation is age-induced testosterone decline. Testosterone, a crucial male sex hormone, plays pivotal roles in spermatogenesis and sexual function, and contributes significantly to metabolism, psychology, and cardiovascular health. Aging exerts profound effects on the hypothalamic-pituitary-gonadal axis and Leydig cells, precipitating testosterone reduction, which adversely affects male health. Exogenous testosterone supplementation can partially ameliorate age-related testosterone deficiency; however, its long-term safety remains contentious. Preserving endogenous testosterone production capacity during the aging process warrants further investigation as a potential intervention strategy.

Penile length after penile implant surgery is determined by stretched penile length before surgery

BACKGROUND

While various treatment modalities exist, penile prosthesis (PP) implantation offers a permanent solution for patients that do not respond to or are not suitable for other treatment options for erectile dysfunction.

AIM

The aim of this study was to establish stretched penile length before surgery as a reliable determining factor of penile length after penile implant surgery.

METHODS

For this study, data on penile length before and after PP surgery from three European centers was analyzed. Penile length measurements were conducted preoperatively and postoperatively in different conditions using standardized techniques. Only virgin cases were included and a complete case analysis was performed.

OUTCOME

The outcome of this study was the comparison of stretched penile length before and the inflated penile length after PP surgery.

RESULTS

Data on penile length before and after PP of 361 patients was analyzed. Preoperative stretched penile length was equal to postoperative inflated penile length in 33% of patients. The absolute mean difference between pre-surgery stretched and postoperative inflated lengths was 1.1 cm. No correlation was found between implanted cylinder length and postoperative penile length. Additionally, the choice of implant type did not significantly affect postoperative penile length outcomes.

CLINICAL IMPLICATIONS

Our findings confirm the reliability of preoperative stretched penile length as a tool for proper patient counseling before PP surgery.

STRENGTHS & LIMITATIONS

Although our study is overpowered, our results show that preoperative stretched penile length serves as a reliable predictor of postoperative penile length outcomes after PP surgery. By providing clinicians with a tool for patient counseling, our findings contribute to enhancing satisfaction and quality of life outcomes in patients undergoing PP implantation.

CONCLUSION

Preoperative stretched penile length serves as a reliable predictor of postoperative penile length outcomes after PP surgery.

Sildenafil citrate induces prostatic hyperplasia in BPH model rats and aged rats

Erectile dysfunction (ED), a prevalent disease among middle-aged and elderly males, significantly impacts both patient and partner quality of life. Phosphodiesterase type 5 inhibitor (PDE5i) represents an effective therapeutic method for ED. Given their widespread global utilization, concerns arise regarding potential reproduction-related problems arising from clinical use. During the extensive development of PDE5i, we speculated that the potential of these inhibitors to variably induce prostatic hyperplasia, but this field remains unexplored. In order to verify the male reproductive toxicity of PDE5i, sildenafil citrate at doses of 5, 10 and 20 mg/kg was administered in BPH model rats and aged rats. Anatomical and pathological analyses indicate a compelling association between sildenafil citrate administration and the promotion of prostatic hyperplasia in both BPH model rats and aged rats. Serum analysis showed that serum prostate-binding protein (PBP) exhibited a non-significant but increasing trend following administration of sildenafil citrate to BPH model rats. Furthermore, significant increase in serum levels of E2 and T, as well as T in dorsal lobe prostate tissue of aged rats, were observed compared to the model control group. These results confirm the hypothesis that sildenafil citrate has reproductive toxicity in males.

Cognitive behavioral therapy combined with selective serotonin reuptake inhibitors for premature ejaculation: A systematic review and meta-analysis

BACKGROUND

Premature ejaculation (PE) remains one of the most common male disorders. Many clinical trials have shown that cognitive behavioral therapy (CBT) has significant efficacy in the treatment of PE. The purpose of this article is to review the current evidence regarding the efficacy and safety of CBT combined with selective serotonin reuptake inhibitors (SSRIs) for treating PE.

METHODS

We selected eligible randomized controlled trials (RCTs) from databases including Chinese National Knowledge Infrastructure (CNKI), Wanfang, VIP, China Biology Medicine (CBM), Pubmed, Embase, and Cochrane Library. All data in this paper were analyzed using STATA 17.1 software. Cochrane Evaluator's Manual 5.3 was used to assess the quality of the included literature. Data collection was conducted up until May 2024.

RESULTS

Finally, 15 high-quality randomized controlled trials were included, with 1243 patients, 653 experimental groups and 590 control groups. The meta-analysis showed that, compared with SSRIs alone, behavioral therapy combined with SSRIs can significantly prolong the IELT of PE patients, and improve perceived control over ejaculation, Chinese Index of Premature ejaculation-5 (CIPE-5), sexual life satisfaction, and spouses' sexual life satisfaction. Furthermore, there were no significant differences in side effects between the two groups. In addition, the published bias test results showed no significant bias.

CONCLUSION

CBT combined with SSRIs could be a viable alternative for the treatment of PE. Both cognitive and behavioral training or behavioral training alone as a supplement to SSRIs are effective, with no significant increase in adverse reactions.

The spreading information of YouTube videos on Phosphodiesterase 5 inhibitors: a worrisome picture from one of the most consulted internet source

Several previous studies on YouTubeTM information on medical topics have already been published. The current study aimed to evaluate the quality information of YouTubeTM videos on Phosphodiesterase 5 inhibitors (PDE5-is). A systematic search on YouTube™ was conducted using 30 keyword combinations. For each keyword's combination, the first 50 videos were recorded. The quality of videos on YouTube™ was assessed with Patient Education Materials Assessment Tool for audio-visual content (PEMAT A/V), DISCERN score and a specified created Misinformation tool. According to the selection criteria, 229 YouTube™ videos were suitable for the analyses. Videos were stratified according to the five main identified topics: sildenafil [n = 98; 42.79%] vs tadalafil [n = 50; 21.83%] vs vardenafil [n = 44;19.21%] vs avanafil [n = 17; 7.42%] vs PDE5-is in general [n = 20; 8.73%]. The median overall PEMAT A/V Understandability score and Actionability score were 55% (interquartile range [IQR]: 42-75) and 0% (IQR = 0-67), respectively. Specifically, according to our stratification, YouTube Videos on avanafil reached higher values of both Understandability and Actionability (72.7% and 66.7, respectively) in contrast to other categories. According to DISCERN tool, the total overall median score was 29.5 (IQR = 18-41). According to Misinformation scale, the item 1 ('sexual stimulation') harboured an overall median score of 2 (IQR = 1-2); the item 2 ('side effects') an overall median score of 2 (IQR = 1-3); the item 3 ('treatment choices') an overall median score of 1 (IQR = 1-2); the item 4 ('contraindications') an overall median score of 2 (IQR = 1-2). YouTube™ is a fast and open-access source for mass information. The overall quality of the PDE5-is contents provided is sadly unsatisfactory. Nowadays, YouTube™ cannot be recommended as a reliable source of information on PDE5-is.

Quality and benefits of the erectile dysfunction information on websites, social-media, and applications

Erectile Dysfunction (ED) is defined as the persistent inability to obtain and maintain an erection that enables satisfactory sexual intercourse. ED prevalence vary across age groups, affecting approximately 1-9% of men under 40, 2-9% of those aged 40-59, and increasing to 20-40% for those aged 60-69. However, it remains a frequently untreated or insufficiently treated condition. Especially due to the feeling of discomfort and guilt, patients often avoid consulting their physicians; in this context, digital innovation could potentially play a pivotal role in the diagnosis and management of ED. This narrative review depicts the ongoing status of digital innovations in ED focusing on websites, social media platforms and mobile health applications (MHA). We examined Google, social media platforms (Facebook, Twitter, YouTube, and TikTok), and the recently developed MHA apps on Google Play Store and Apple App Store. Websites provide readily available but sometimes difficult to understand information, while social media is easy to understand and act on. MHA apps are the most complete and trustworthy tool for self-care management. In conclusion, digital innovations are a continuously growing source of information and therapeutic tools.

Prevalence and trends in physical therapy interventions for erectile dysfunction: A Scopus-based bibliometric analysis (1989-2022)

BACKGROUND

Erectile dysfunction (ED) is a condition that affects many males. Physical therapy (PT) is the one potential treatment for ED that may improve blood flow, muscle strength, and other factors that may contribute to the issue. Data on the prevalence and trends of research on PT for ED are lacking.

OBJECTIVE

This study aimed to evaluate the literature trends in PT for ED via bibliometric and visualized analysis.

METHODS

Data on publications were collected from Scopus covering the period between 1989 and 2022. To refine the data, bibliometric analyses were conducted using Microsoft Access, Microsoft Excel, an online visualization platform, and BiblioAnalytics. Power BI and Bibliomaster were used to generate figures and tables, while Biblioshiny and VOSviewer were used for visualization.

RESULTS

A total of 494 documents were identified. The year 2019 generated the largest number of publications, with a total of 54. These studies have received 12,917 citations related to PT for ED. The most common document type was the original article with 283 publications. The University of California, USA, was the most productive institution on this topic, with 21 publications and 2,035 citations. The USA led all countries with 114 publications on the topic. The Journal of Sexual Medicine secured the top ranking with an h-index of 18. The main topics studied were erectile dysfunction, shockwave therapy, and physiotherapy.

CONCLUSION

The number of publications on PT for ED has demonstrated an upward trend over the last three decades.

Pharmacotherapeutic strategies for the management of erectile dysfunction in patients with diabetes and pre-diabetes

INTRODUCTION

Erectile dysfunction (ED) is a neglected complication in patients with pre-diabetes or diabetes mellitus (DM).

AREAS COVERED

A summary and review of the role of standard ED treatment and the contribution of lifestyle modification and hypoglycemic drugs.

EXPERT OPINION

Oral phosphodiesterase type 5 inhibitors (PDE5i) represent the first-line therapy even in patients with DM. Testosterone replacement therapy (TRT) is mandatory in all hypogonadal (total testosterone < 12 nmol/l) subjects. Alprostadil and/or combined approaches can be considered when PED5i with or without TRT fail. The glycometabolic optimization through lifestyle modification and the use of hypoglycemic drugs represents a crucial step, even for ED treatment. Considering the strong association between ED and forthcoming cardiovascular diseases, the selection of glucagon-like peptide type 1 analogues or sodium glucose cotransporter-2 inhibitors seems to represent the best option due to their long-term effect on chronic complication prevention. Metformin can be considered a possible alternative in less complicated subjects. Penile prostheses (PP) can be offered when all other options are not effective, but the patients should be informed that poor glycometabolic control can increase the risk of PP infection.

Repeated platelet-rich plasma injections improve erectile dysfunction in a rat model of hyperhomocysteinemia

ABSTRACT

Platelet-rich plasma (PRP) shows promise as a regenerative modality for mild-to-moderate erectile dysfunction (ED). However, its efficacy in treating severe ED remains unknown. Blood samples from 8-week-old male rats were used to prepare PRP through a two-step centrifugation procedure, followed by chitosan activation and freeze thaw cycle. A hyperhomocysteinemia (HHcy)-related ED model was established using a methionine-enriched diet, and an apomorphine (APO) test was conducted during the 4 th week. APO-negative rats were divided into two groups and were injected with PRP or saline every 2 weeks. Erectile function and histological analyses of the corpus cavernosum were performed during the 16 th week. The results revealed that erectile function was significantly impaired in rats with HHcy-related ED compared to that in age-matched rats but was improved by repeated PRP injections. Immunofluorescence staining revealed a reduction in reactive oxygen species and additional benefits on the recovery of structures within the corpus cavernosum in rats that received PRP treatment compared to those in the saline-injected control group. Therefore, PRP could enhance functional and structural recovery in a severe HHcy-related ED model. A notable strength of the present study lies in the use of a repeated intracavernous injection method, mirroring protocols used in human studies, which offers more reliable results for translating the findings to humans.

Association between serum NUCB2/nesfatin‑1 levels and erectile dysfunction

Erectile dysfunction (ED) is one of the most common complaints in the male sexual health field, with a multifactorial etiology yet to be fully elucidated. Nucleobindin 2 (NUCB2)/nesfatin-1, known for its regulatory role in food intake, can also regulate the vascular, neural and hormonal systems, all of which are of great importance in the etiology of ED. The present study included 43 men with ED and 40 healthy individuals without ED. The participants were assessed using the Turkish version of the International Index of Erectile Function (IIEF-5) to determine the presence and severity of ED. Serum NUCB2/nesfatin-1, total testosterone, fasting blood glucose, hemoglobin A1c, total cholesterol, low-density lipoprotein, high-density lipoprotein, very low-density lipoprotein, triglyceride and total prostate-specific antigen levels were all measured. The mean age of the participants was 46.77±9.87 years with an age range of 25-67 years. The mean ages of the ED and non-ED groups were 47.47±11.19 and 46.03±8.30 years, respectively. Patient age and serum biochemical parameters were found to be comparable between the two groups. The serum NUCB2/nesfatin-1 levels of the ED group were also revealed to be significantly lower compared with those of the non-ED group (P=0.019). There was a weak negative correlation between the serum NUCB2/nesfatin-1 level and the severity of ED according to the IIEF-5 score (r=-0.306; P=0.005). The receiver operating characteristic curve analysis of serum NUCB2/nesfatin-1 revealed a cut-off value of 1.25 ng/ml for distinguishing between the ED and non-ED groups (P=0.019). These findings suggest that reduced serum NUCB2/nesfatin-1 values may be implicated in the etiology of ED. Further studies are required to clarify the effect of NUCB2/nesfatin-1 on vascular physiology and erectile physiology or pathophysiology.

The neurological decline and psychological factors caused by coronavirus disease 2019 may be predictors of erectile dysfunction

BACKGROUND

Since the outbreak of coronavirus disease 2019, it has had a serious impact on people's physical and mental health. However, in our clinical work, we have found that the erectile function of coronavirus disease 2019 patients with neurological decline was often seriously affected.

OBJECTIVES

To further explore the relationship between erectile dysfunction and neurological dysfunction caused by coronavirus disease 2019.

MATERIALS AND METHODS

We conducted a survey from August 2022 to February 2023 at the First Affiliated Hospital of Anhui Medical University and the Third People's Hospital of Linyi City. A total of 251 subjects with a history of coronavirus disease 2019 infection were included. Symptoms and changes in erectile function after the coronavirus disease 2019 infection were collected and assessed using the International Index of Erectile Function-5 scale and several targeted questions.

RESULTS

In this study, we found that in patients infected with novel coronavirus, the proportion of erectile dysfunction was higher in those with neurological manifestations such as olfactory and taste impairment or psychological symptoms such as anxiety.

DISCUSSION

We found that neurological decline and psychological factors were independent and significant risk factors for erectile dysfunction caused by coronavirus disease 2019.

CONCLUSION

Patients with neurological damage or psychiatric symptoms are more likely to have erectile dysfunction, suggesting that the 2019 novel coronavirus may affect erectile function by damaging nerves. This provides a new insight into the mechanism of erectile dysfunction.

Nutraceutical interventions for erectile dysfunction: a systematic review and network meta-analysis

BACKGROUND

Although nutraceutical-based treatments are often offered for erectile dysfunction (ED), their efficacy remains doubtful, and the choice of one substance over the other is challenged by the dearth of head-to-head comparative studies.

AIM

We aimed to compare the efficacy of available nutraceutical interventions, alone or in combination with phosphodiesterase type 5 inhibitors (PDE5i), in improving erectile function in men with ED through a network meta-analysis (NMA), which incorporates direct and indirect evidence into one model thus generating a hierarchy of effectiveness.

METHODS

PubMed, Scopus, Web of Sciences, and Cochrane Library databases were searched for randomized placebo-controlled trials (RCTs) assessing the effect of any nutraceutical regimen in improving erectile function when compared to each other, placebo, and/or PDE5i in men with ED. Data were included in a random-effects NMA, where efficacy of treatments was ranked by surface under the cumulative ranking curve (SUCRA). Two NMAs were also conducted separately for organic and non-organic ED. Reciprocal comparisons between all treatments were analyzed by league tables.

OUTCOMES

The main outcome was the standardized mean difference in the score of the International Index of Erectile Function (IIEF)-5 or IIEF-6.

RESULTS

Fifteen RCTs provided information on 1000 men with ED. In the overall NMA, compared to placebo, the combination propionyl L-carnitine (PLC) + acetyl L-carnitine (ALC) + Sildenafil was associated with the highest SUCRA (97%) in improving erectile function score, followed by L-Arginine + Tadalafil (84%), Sildenafil (79%), Tadalafil (72%), and L-Arginine (52%). No other treatment regimen showed efficacy with statistical significance. In patients with organic ED, the efficacy of Sildenafil and Tadalafil was significantly improved by PLC + ALC and L-Arginine, respectively. On the contrary, in non-organic ED, nutraceuticals did not improve the therapeutic performance of daily Tadalafil.

CLINICAL IMPLICATIONS

This NMA contributes valuable insights into the potential of nutraceutical interventions for ED.

STRENGTHS AND LIMITATIONS

We employed strict inclusion criteria related to study design and diagnostic tool, ensuring the assumption of transitivity and the consistency of the analysis.

CONCLUSION

Against a background of general ineffectiveness of most nutraceutical interventions, L-Arginine and the mix PLC + ALC appeared to be of some usefulness in improving erectile function, especially in combination with PDE5i in organic ED.

Discrepancy Between Patient vs Provider Assessment of Erection Quality

OBJECTIVE

To characterize the discrepancy between patients' and providers' assessments of erection rigidity and its association with patient characteristics and penile ultrasound parameters.

METHODS

Patients presenting for penile Doppler ultrasound between July 2022 and October 2023 were reviewed retrospectively. After intracavernosal injection, patients and providers independently rated erection rigidity from 1 to 10 prior to ultrasound. We defined discrepancy as a difference of 2 out of 10 or greater between the two assessments. Chi-squared and Mann-Whitney U tests were used for hypothesis testing.

RESULTS

65/297 (22%) of patients demonstrated a discrepancy in perceived erection quality. 58/65 (89%) of these patients rated their erections lower than their providers. There was a higher incidence of erectile dysfunction as the primary diagnosis in the discrepant group as compared to the concordant group (P = .01). The discrepant group also showed a higher resistive index on penile ultrasound (P = .04), with no difference in peak systolic velocity, end diastolic velocity, or other clinical variables between the two groups.

CONCLUSION

Discrepancy in perceived erection rigidity was mainly driven by lower patient perception, although these patients had noninferior penile hemodynamics to their peers. These findings underscore the influence of subjective perception of virility on sexual function. It is critical for clinicians to identify patients with poor perception of erectile function out of proportion to physiologic abnormalities. Thoughtful counseling about treatment goals and expectations, emphasizing functional outcomes, and adjunctive treatments such as sex therapy or psychotherapy are critical to therapeutic success in this population.

Development of a new digital sexual health assessment tool to help patients better understand the factors involved in their sexual disorders - "The Sexual Dysfunction Evaluation Tool" (SEXDET)

INTRODUCTION

A visual digital tool called SEXual Dysfunction Evaluation Tool (SEX-DET) was created for assessing the causes of sexual dysfunction, based on a biopsychosocialsexual and relational schema, to assist patients in understanding the relative influence of the various factors contributing to their sexual dysfunction. The aim of this study was to evaluate satisfaction of this tool in sexual dysfunction patients and practitioners.

METHODS

A satisfaction study of the SEX-DET was performed in 50 patients (20 F, 30 M) consulting for a sexual trouble and 3 practitioners. The main reasons for consultation were erectile dysfunction (36%) and desire disorder (30%).

RESULTS

All the participants agreed that the SEX-DET helped them to understand the origin their trouble (46% strongly, 42% moderately, 12% somewhat), the various factors involved (56% strongly, 22% moderately and 18% somewhat) and the management of their trouble (6% strongly, 47% moderately, 33% somewhat). Overall, 94% of participants found that the SEX-DET was easy to use (58% strongly, 16% moderately and 20% somewhat). Practitioners acknowledged the user-friendly interface, its critical role in improving patients' understanding and providing a comprehensive visualization of the dimensions associated with sexual dysfunction, even if one practitioner threatened the tool's intrinsic inclination to oversimplify complex data.

CONCLUSION

SEX-DET enabled to improve patients' understanding of their trouble and helped practitioners in structuring better communication during consultations communication regarding sexual dysfunction. The shortcomings of this study was its focus on short-term outcomes, self-reported data, and the absence of control group.

LEVEL OF EVIDENCE: 3

Regenerative therapies for erectile dysfunction: a systematic review, Bayesian network meta-analysis, and meta-regression

BACKGROUND

Current guidelines advocate a shared decision-making process approach to erectile dysfunction management, and while there is growing interest in regenerative therapies such as stem cell therapy, platelet-rich plasma injections, and low-intensity shockwave therapy for erectile dysfunction, comparative data on the efficacy of these modalities are limited.

AIM

This systematic review and network meta-analysis aims to compare stem cell therapy, platelet-rich plasma injections, and low-intensity shockwave therapy for managing erectile dysfunction and quantify their impact on the International Index of Erectile Function (IIEF).

METHODS

In January 2024, a systematic search of online databases was performed to identify randomized clinical trials related to stem cell therapy, platelet-rich plasma injections, and low-intensity shockwave therapy in erectile dysfunction. Eligible articles reported outcomes using the IIEF score. Data were inputted into Review Manager 5.4 for pairwise meta-analysis. Data were then used to build a network in R Studio. These networks were used to model 200 000 Markov Chains via MonteCarlo sampling. The results are expressed as standardized mean difference (SMD) with 95% credible intervals (CrI). Meta-regression was used to adjust for PDE5is use.

OUTCOMES

Impact on the International Index of Erectile Function.

RESULTS

A total of 16 studies involving 907 patients were analyzed. The standardized mean difference (SMD) vs control for stem cell therapy was 0.92 [95% CrI -0.49, 2.3]. For platelet-rich plasma, the SMD vs control was 0.83 [95% CrI 0.15, 1.5], and for low-intensity shockwave therapy, the SMD vs control was 0.84 [95% CrI 0.49, 1.2]. When stratifying low-intensity shockwave therapy by dose, the SMD vs control at 0.15 mJ/mm2 was 1.1 [95% CrI 0.36, 1.9], while at 0.09 mJ/mm2, it was 0.75 [95% CrI 0.26, 1.2]. Meta-regression adjusting for the administration of PDE5 inhibitors yielded non-significant results.

CLINICAL IMPLICATIONS

The findings suggest that stem cells, platelet-rich plasma, and low intensity shockwave therapy, particularly at 0.15 and 0.09 mJ/mm2, may offer improvements in erectile function.

STRENGTHS AND LIMITATIONS

The strength is the robust statistical methods. Limitations are in heterogeneity in control groups and follow-up durations among included studies.

CONCLUSION

Shockwave therapy and platelet-rich plasma demonstrated statistically significant improvements, though the clinical relevance and extent of their impact remain questionable. Further research is necessary to determine the efficacy of stem cell therapies for erectile function.

Effects of Varicocele Repair on Testicular Endocrine Function: A Systematic Review and Meta-Analysis

PURPOSE

The objective of this manuscript is to assess the effect of varicocele repair (VR) in patients with clinical varicoceles on serum total testosterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and inhibin B serum levels.

MATERIALS AND METHODS

The study was performed in compliance with the Meta-Analysis and Systematic Reviews of Observational Studies (MOOSE) guidelines and the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P). All eligible studies were selected following the PICOS (Population, Intervention, Comparison/Comparator, Outcomes, Study design) model. The values of each outcome measured after VR were compared to the before parameters and, when available, to the values on patients with unrepaired varicocele, and to those of healthy controls with no varicocele. For total testosterone, the values were sub-analyzed based on the mean total testosterone levels before VR (<300 ng/dL or >300 ng/dL), the fertility status, the time of follow-up and the technique used for VR.

RESULTS

From a total of 460 abstracts retrieved, 48 articles were included in our meta-analysis. Serum total testosterone levels were significantly higher after VR compared to both pre-treatment levels (mean difference [MD] 82.45 ng/dL, 95% confidence interval [CI]: 64.14-100.76; p<0.00001) and to the levels of patients with unrepaired varicocele (MD 91.64 ng/dL, 95% CI: 62.30-120.99; p<0.00001). They did not differ from the levels of healthy controls with no varicocele (MD -22.01 ng/dL, 95% CI: -68.59-24.58; p=0.35). The increase resulted to be independent from the mean total testosterone levels before VR, fertility status, time of follow-up and type of VR. After VR, a trend toward lower serum LH levels was found compared to before values (MD -0.37 IU/L, 95% CI: -0.74-0.01; p=0.06). When compared to the levels of patients with unrepaired VR, LH levels after VR were significantly lower (MD -0.96 IU/L, 95% CI: -1.56 to -0.35; p=0.002). LH levels were not significantly higher than healthy men without varicocele (MD 0.84 IU/L, 95% CI: -0.68-2.36; p=0.28). Patients with VR had significantly lower FSH levels compared to their pre-treatment values (MD -1.43 IU/L, 95% CI: -1.82 to -1.04; p<0.00001), and also to those of patients with non-repaired varicocele (MD -2.35 IU/L, 95% CI: -4.06 to -0.65; p=0.007). When compared to healthy controls with no varicocele, FSH levels were significantly higher (MD 2.71 IU/L, 95% CI: 1.12-4.31; p=0.0009). Lastly, after VR no significant change in inhibin B serum levels was seen compared to pre-treatment levels (MD 11.76 pg/mL, 95% CI: -3.83-27.35; p=0.14).

CONCLUSIONS

The present meta-analysis is the largest to date to assess the impact of VR on Leydig cell and Sertoli cell function using a before-after analysis for uncontrolled studies, and using data from patients with unrepaired varicoceles or healthy patients without varicocele as controls. VR was found to increase and restore to normality serum levels of total testosterone and LH. This evidence could be of value in considering the treatment of varicocele in patients with low testosterone or those who show a progressive decline in testosterone levels.

Mechanisms of erectile dysfunction induced by aging: A comprehensive review

BACKGROUND

With the increasing trend ofpopulation aging, erectile dysfunction (ED) among elderly men has emerged as apressing health concern. Despite extensive research on the relationship betweenED and aging, ongoing discoveries and evidence continue to arise.

OBJECTIVE

Through this comprehensiveanalysis, we aim to provide a more nuanced theoretical framework for thedevelopment of preventive and therapeutic strategies for senile ED, ultimatelyenhancing the quality of life for elderly men.

METHODS

This review delves deeper into thecore mechanisms underlying ED in the context of aging and offers acomprehensive overview of published meta-analyses and systematic reviewspertinent to these conditions.

RESULTS AND CONCLUSION

Our findings revealthat local structural damage to the penis, vascular dysfunction, neuronalinjury, hormonal alterations, other physiological changes, and psychologicalbarriers all play pivotal roles in the pathogenesis of aging-related ED.Furthermore, more than 20 diseases closely associated with aging have beenimplicated in the occurrence of ED, further compounding the complexity of thisissue.

Exploring the impact of sexual positions on ejaculation: Insights from a survey study by the Andrology Working Group of the Society of Urological Surgery in Turkey

BACKGROUND

Sexual position is one of the several aspects that affects ejaculation control, which is essential for sexual pleasure. Still little is known, nevertheless, about the connection between sexual positions and ejaculation duration.

OBJECTIVE

To investigate the impact of various sexual positions on the duration of ejaculation and gain a deeper understanding of the elements that influence the ability to control ejaculation.

METHOD

An online survey was carried out on a sample of 1904 heterosexual men between the ages of 18-65 years. Premature ejaculation (PE) diagnostic tool was used to define PE. Demographic, behavioral, and physiological traits that are linked to PE and non-PE groups were collected. The participants listed their preferred sexual positions and the ones they changed to during ejaculating. Also, analyses were performed between male/female active or deep/shallow thrust positions and PE status.

RESULTS

Although there were no appreciable variations in age or circumcision between PE and non-PE groups, the age of first sexual experience was associated with PE status. Groups also varied in the number of weekly ejaculations, the duration of the favored ejaculations, and the characteristics of the erection. The most preferred sexual posture was the doggy style regardless of the group. When the non-PE group felt to ejaculate, they preferred to change the position significantly more than the PE group (74% vs 67.2%; p < 0.05). However, when participants felt ejaculate, non-PE participants tended to switch to shallow thrusting positions significantly more than PE participants, who preferred deeper positions (27.1% vs. 18%; p < 0.05).

CONCLUSION

This study underlines the relevance of considering sexual positions in controlling PE. Modifying positions during sexual intercourse may offer a non-pharmacological therapeutic alternative for improving ejaculation control. Future studies in this field might help to create tailored PE treatment strategies.

The potential role of intracavernosal injection of platelet-rich plasma for treating patients with mild to moderate erectile dysfunction: A GRADE-Assessed systematic review and meta-analysis of randomized controlled trials

INTRODUCTION

Platelet-rich plasma (PRP) has shown positive effects on enhancing erectile function in animal studies. Human clinical trials are limited and provide contradictory results. This review aims to conduct a meta-analysis of the available Randomized controlled trials (RCT) to assess the efficacy of PRP in males with ED.

METHODS

A systematic review was carried out following the Cochrane Handbook of Intervention and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and registered in PROSPERO (CRD42023441655).

RESULTS

A total of three RCTs were included in the analysis for a total of 221 patients with mild to moderate ED. The patients receiving PRP reported significantly better improvement of IIEFEF score during 1,3- and 6-months follow-up compared to the placebo group (mean difference [MD] 2.66, 95% confidence interval [CI] 1.48 to 3.83, p < 0.01; MD 2.11, 95%CI 0.13 to 4.09, p = 0.04; MD 2.99, 95%CI 1.79 to 4.19, p < 0.01). The pooled analysis indicated that attainment of minimally clinical important difference (MCID) was significantly higher in patients receiving PRP compared to the placebo group during one and 6-month follow-up (odds ratio [OR] 5.51, 95%CI 1.2 to 254, p = 0.03; OR 5.64, 95%CI 2.05 to 15.55, p < 0.01; respectively). Encouragingly, no major AEs were reported in all three trials in the PRP and placebo groups (p = 0.99).

CONCLUSIONS

This review highlights the potential role of PRP in providing short-term improvement of erectile function parameters for up to 6 months in mild to moderate ED patients. Future RCTs with longer-duration follow-ups and more standardized treatment protocols are necessary to gain sufficient details on PRP's long-term effectiveness and safety.

Age-related impairment in testosterone elevation after anterior fibromuscular stroma preserved enucleation

OBJECTIVES

This study aims to evaluate the impact of anterior fibromuscular stroma preserved enucleation (AFSPE) of the prostate on serum testosterone levels in patients with benign prostatic obstruction (BPO) and to explore age-related differences in postoperative testosterone elevation.

METHODS

In a retrospective analysis, 304 patients from a pool of 560 who underwent AFSPE at Linkou Chang Gung Memorial Hospital between January 2018 and December 2021 were evaluated. Patients were stratified based on preoperative testosterone levels into low (<3.5 ng/mL) and normal (≥3.5 ng/mL) groups. Serum testosterone levels were measured preoperatively, at 1.5 and 3-6 months postoperatively. Age and other demographic data were analyzed as potential factors influencing testosterone changes.

RESULTS

The low-testosterone group (n = 90) showed significant testosterone increases, from an average of 2.61 ng/mL preoperatively to 3.3 ng/mL at 1.5 months and 3.59 ng/mL at 3-6 months postoperatively (p < 0.0001). The normal-testosterone group (n = 214) maintained stable testosterone levels at 1.5 months but exhibited a significant rise to 6.06 ng/mL by 3-6 months (p = 0.0079). Older age was inversely associated with postoperative testosterone elevation in both groups. Improvements in nocturia were notable in both groups.

CONCLUSIONS

AFSPE of the prostate significantly elevates serum testosterone levels in men with BPO, particularly benefiting those initially with low levels. Age is a crucial factor influencing postoperative testosterone changes, indicating that younger patients may benefit more from this intervention. AFSPE offers a promising approach for improving hormonal health in BPO patients, alongside alleviating urinary symptoms.

Male hypogonadism: pathogenesis, diagnosis, and management

Organic male hypogonadism due to irreversible hypothalamic-pituitary-testicular (HPT) pathology is easily diagnosed and treated with testosterone-replacement therapy. However, controversy surrounds the global practice of prescribing testosterone to symptomatic men with low testosterone and non-gonadal factors reducing health status, such as obesity, type 2 diabetes, and ageing (ie, functional hypogonadism), but without identifiable HPT axis pathology. Health optimisation remains the gold-standard management strategy. Nevertheless, in the last decade large clinical trials and an individual patient data meta-analysis of smaller clinical trials confirmed that testosterone therapy induces modest, yet statistically significant, improvements in sexual function without increasing short-term to medium-term cardiovascular or prostate cancer risks in men with functional hypogonadism. Although testosterone improves bone mineral density and insulin sensitivity in these men, trials from the last decade suggest insufficient evidence to determine the safety and effectiveness of use of this hormone for the prevention of fractures or type 2 diabetes. This Review discusses the pathogenesis and diagnosis of male hypogonadism and appraises the evidence underpinning the management of this condition.

Multimodal treatments based on Tadalafil during acute phase of Peyronie's disease: experience at two referral academic centers

AIM

The purpose of this study is to identify the clinical outcomes of patients during acute phase of Peyronie's disease (PD) treated with daily Tadalafil 5 mg associated with non-surgical treatments such as intra-plaque verapamil injections (IVI), vacuum erection devices (VED) or extra corporeal shockwave therapy (ESWT).

METHODS

445 patients with PD in acute stage were treated as it follows: Group 1(G1) 117 men with only Tadalafil 5 mg once a day for 3 months; Group 2(G2) 106 men with IVI plus Tadalafil 5 mg for a period of 12 weeks; Group 3(G3) 124 men that received ESWT for 6 weeks plus Tadalafil with the same protocol of G1; Group 4(G4) 98 men with VED plus Tadalafil 5 mg for 3 months. There were assessed at baseline and follow-up: Erectile dysfunction (ED), presence and severity of painful erections, penile plaque size and penile curvature degree. The results were evaluated at baseline and 3,6,12 months.

RESULTS

Not statistically significant differences emerged between the two groups at baseline, except for higher presence of patients with ED in in G3(7.4%) vs other groups(p < 0.001). Three months after the treatment in G3 men had a significant reduction of penile curvature degrees after 1 year by treatments, whereas pain in an erection or during intercourse was resolved completely in 75% of the patients.

CONCLUSIONS

Our study highlights that multimodal therapy has beneficial long-term effects not only in the decrease of ED symptoms, but also in the relief of the penile curvature and the quality of life.

Practice and development of male contraception: European Academy of Andrology and American Society of Andrology guidelines

BACKGROUNDS

Despite a wide spectrum of contraceptive methods for women, the unintended pregnancy rate remains high (45% in the US), with 50% resulting in abortion. Currently, 20% of global contraceptive use is male-directed, with a wide variation among countries due to limited availability and lack of efficacy. Worldwide studies indicate that >50% of men would opt to use a reversible method, and 90% of women would rely on their partner to use a contraceptive. Additional reasons for novel male contraceptive methods to be available include the increased life expectancy, sharing the reproductive risks among partners, social issues, the lack of pharma industry involvement and the lack of opinion makers advocating for male contraception.

AIM

The present guidelines aim to review the status regarding male contraception, the current state of the art to support the clinical practice, recommend minimal requirements for new male contraceptive development and provide and grade updated, evidence-based recommendations from the European Society of Andrology (EAA) and the American Society of Andrology (ASA).

METHODS

An expert panel of academicians appointed by the EAA and the ASA generated a consensus guideline according to the GRADE (Grading of Recommendations, Assessment, Development and Evaluation) system.

RESULTS

Sixty evidence-based and graded recommendations were produced on couple-centered communication, behaviors, barrier methods, semen analysis and contraceptive efficacy, physical agents, surgical methods, actions before initiating male contraception, hormonal methods, non-hormonal methods, vaccines, and social and ethical considerations.

CONCLUSION

As gender roles transform and gender equity is established in relationships, the male contribution to family planning must be facilitated. Efficient and safe male-directed methods must be evaluated and introduced into clinical practice, preferably reversible, either hormonal or non-hormonal. From a future perspective, identifying new hormonal combinations, suitable testicular targets, and emerging vas occlusion methods will produce novel molecules and products for male contraception.

Clinical factors impacting microdissection testicular sperm extraction success in hypogonadal men with nonobstructive azoospermia

OBJECTIVE

To explore factors influencing microdissection testicular sperm extraction (micro-TESE) success in hypogonadal men with nonobstructive azoospermia (NOA).

DESIGN

A cohort study.

SETTING

University-affiliated male reproductive health center.

PATIENT(S)

A total of 616 consecutive patients with NOA and hypogonadism (total testosterone [T] levels <350 ng/dL) underwent micro-TESE between 2014 and 2021. All patients had no prior sperm retrieval (SR) history.

INTERVENTION(S)

Patients aged 23-55 years underwent comprehensive clinical, laboratory, and histopathological diagnostic evaluation for NOA and were further categorized into two cohorts on the basis of pre-SR hormonal stimulation.

MAIN OUTCOME MEASURE(S)

A multivariable logistic regression analysis explored the associations between patient variables and micro-TESE success, defined as the presence of viable spermatozoa in extracted specimens. Adjusted odds ratios (aORs) and 95% confidence intervals (CIs) were computed to assess the relationship between SR success and relevant predictors. Sperm retrieval rates were compared between patients receiving or not hormonal stimulation, and logistic regression analysis evaluated the effect of baseline follicle-stimulating hormone levels (i.e., normogonadotropic vs. hypergonadotropic classes) on SR success.

RESULT(S)

The overall micro-TESE success rate was 56.6%. Baseline follicle-stimulating hormone levels (aOR, 0.97; 95% CI, 0.94-0.99), pre-SR hormonal stimulation (aOR, 2.54; 95% CI, 1.64-3.93), presence of clinical varicocele (aOR, 0.05; 95% CI, 0.01-0.51), history of previous varicocelectomy (aOR, 2.55; 95% CI, 1.26-5.16), and testicular histopathology were independent predictors of SR success. Among hormone-pretreated patients, pre-micro-TESE T levels and delta T (an absolute increase in T levels from baseline) were associated with SR success. A pre-micro-TESE T level of 418.5 ng/dL (area under the curve value: 0.78) and a delta T of 258 ng/dL (area under the value: 0.76) distinguished patients with positive and negative SR outcomes. Subgroup analysis showed that pre-SR hormonal stimulation yielded a greater benefit for normogonadotropic patients than for those who were hypergonadotropic.

CONCLUSION(S)

This study underscores the association between clinical factors and micro-TESE success in hypogonadal men with NOA. Although causality is not established, our findings suggest that these patients may benefit from pre-SR interventions, particularly hormonal stimulation and varicocele repair.

CLINICAL TRIAL REGISTRATION NUMBER

NCT05110391.

The Role of Cells and Cytokines in Male Infertility Induced by Orchitis

Recent studies on male infertility reveal a growing worry: more infertile men are dealing with inflammation in the testis. Analyzing testicular biopsies from infertile men highlights a significant presence of inflammation. This connection, supported by clinical and pathological evidence, emphasizes that testicular inflammation hampers sperm production, leading to lasting declines in sperm count and quality. However, the exact reasons behind male infertility due to orchitis, a type of testicular inflammation, are still uncertain. Understanding these fundamental aspects of molecular signals and cellular mechanisms in testicular inflammation is crucial. Our review delves into recent literature with a dual objective: elucidating potential mechanisms involving immune cells, non-immune cells, and cytokines that link orchitis to male infertility, while also paving the way for precise interventions and solutions to address the challenges of male infertility.

Association between caffeine intake and erectile dysfunction: a meta-analysis of cohort studies

BACKGROUND

Erectile dysfunction (ED) is a common condition with various contributing factors, including lifestyle and dietary habits. Caffeine, a widely consumed stimulant, has been linked to multiple physiological effects on vascular function and hormonal balance that might influence sexual function. This meta-analysis aims to evaluate the association between caffeine intake and the risk of ED by analyzing data from cohort studies.

METHODS

A systematic search was conducted across PubMed, Web of Science, Scopus, and Embase databases, and a manual search was conducted on Google Scholar for studies on the relationship between caffeine intake and ED in adult men. The search included observational studies published up to April 1, 2024. Four cohort studies were included, and their data were extracted and analyzed by STATA version 18.

RESULTS

Four included cohort studies comprised 51,665 cohort members. The study population included adult males, on average, aged 18 to 80. The results indicate that there was no significant relationship between coffee consumption and the risk of ED (relative risk [RR] = 0.94, 95% CI: 0.86-1.03; p = 0.999).

CONCLUSIONS

The current evidence suggests no significant relationship between caffeine intake and ED, but limited studies limit conclusions. Future research should focus on larger sample sizes, standardized outcome assessments, and different dosages and forms of caffeine consumption.

Advances in the study of the relationship between gut microbiota and erectile dysfunction

INTRODUCTION

In recent years, in-depth research has revealed that gut microbiota has an inseparable relationship with erectile dysfunction (ED) in men.

OBJECTIVES

(1) To review the correlation between gut microbiota and ED from the perspective of its impact on men's mental health, metabolism, immunity, and endocrine regulation and (2) to provide reference to further explore the pathogenesis of ED and the improvement of clinical treatment plans.

METHODS

PubMed was used for the literature search to identify publications related to ED and gut microbiota.

RESULTS

Gut microbiota may induce depression and anxiety through the microbiota-gut-brain axis, leading to the occurrence of psychological ED. It may also cause vascular endothelial dysfunction and androgen metabolism disorder by interfering with lipid metabolism, immunity, and endocrine regulation, leading to the occurrence of organic ED.

CONCLUSION

Gut microbiota and its metabolites play an important role in the occurrence and development of ED. As a new influencing factor of ED, gut microbiota disorder is expected to become a target for treatment.

Scoping review exploring advancements in topical agent therapies for erectile dysfunction

INTRODUCTION

Erectile dysfunction (ED) is a common issue that affects older men and is often associated with various health conditions. Phosphodiesterase 5 inhibitors are commonly used to treat ED; however, their effectiveness may be limited, or the medication may be contraindicated. Therefore, topical gels are being developed as an alternative option for the pharmacologic treatment of ED.

OBJECTIVES

This review aimed to provide an overview of the efficacy and safety of topical agents for the treatment of ED.

METHODS

The PubMed, Cochrane, Embase, and Web of Science databases were searched. Articles were included that investigated ED and topical agents operating through the skin of the penis, evaluated the effectiveness of the treatment, and involved patients randomized into groups.

RESULTS

Topical alprostadil, glyceryl trinitrate (MED2005), and an over-the-counter formulation (MED3000) were used as alternative treatments for ED in 7 articles, which included 3475 patients. Topical alprostadil induced an erection in 67% to 75% of patients. Adequate erections for vaginal penetration were reported in 38.7% of the alprostadil-treated patients vs 6.9% of the placebo-treated patients. Topical alprostadil significantly and dose dependently improved the total score change on the International Index of Erectile Function as compared with the placebo. MED2005 exhibited a rapid onset of action, with nearly 70% effectiveness within 10 minutes. MED3000 met the minimal clinically important difference threshold of a 4-point increase on the erectile function domain of the International Index of Erectile Function, with an improvement of 5.73 points in 24 weeks. Topical therapy for ED also had acceptable safety profiles.

CONCLUSION

Topical agents via various mechanisms are effective and well-tolerated treatments for ED. A fast-acting drug that significantly reduces side effects as compared with other options has been discovered. However, its efficacy relative to current first-line therapies remains unclear. Topical agents present a viable therapeutic alternative for individuals who are unable or unwilling to take oral phosphodiesterase 5 inhibitors.

Anti-hypertensive medications and erectile dysfunction: focus on β-blockers

PURPOSE

Although anti-hypertensive medications, including thiazides and β-blockers (BBs) in particular, have been suggested to cause erectile dysfunction (ED) their real contribution is still conflicting. The aim of this paper is to summarize available evidence providing an evidence-based critical analysis of the topic.

METHODS

An overall comprehensive narrative review was performed using Medline, Embase and Cochrane search. In addition, to better understand the impact of BBs on ED a specific systematic review was also performed.

RESULTS

The negative role of centrally acting drugs, such as clonidine and α-methyldopa, is well documented althuogh limited controlled trials are available. Angiotensin-converting enzyme inhibitors (ACEis), angiotensin receptor blockers (ARBs), and calcium-channel-blockers (CCBs) have neutral (CCBs) or even positive (ACEis and ARBs) effects on erectile function. Despite some preliminary negative reports, more recent evidence does not confirm the negative impact of thiazides. BBs should be still considered the class of medications more often associated with ED, although better outcomes can be drawn with nebivolol.

CONCLUSION

Sexual function should be assessed in all patients with arterial hypertension, either at diagnosis or after the prescription of specific medications. A close related patient-physician interaction and discussion can overcome possible negative outcomes allowing a successful management of possible side effects.

Comprehensive analysis of biological landscape of oxidative stress-related genes in diabetic erectile dysfunction

Oxidative stress plays a pivotal role in the pathogenesis of diabetic erectile dysfunction, while specific mechanisms have not been illuminated. The study aims to reveal the genetic expression patterns of oxidative stress in diabetic erectile dysfunction. Transcriptome data of diabetic erectile dysfunction and oxidative stress-related genes (OSRGs) in the Gene Expression Omnibus database were downloaded and analyzed based on differential expression. Functional enrichment analyses were conducted to clarify the biological functions. A protein interaction framework was established, and significant gene profiles were validated in the cavernous endothelial cells, clinical patients, and rat models. A miRNA-OSRGs network was predicted and validated. The results were analyzed using Student's t-test. The analysis screened 203 differentially expressed OSRGs (p < 0.05), which had a close association with oxidoreductase activities, glutathione metabolism, and autophagy. A four-gene signature comprised of EPS8L2 (p = 0.044), GSTA3 (p = 0.015), LOX (p < 0.001) and MGST1 (p = 0.002) was well validated and regarded as the hub OSRGs. Compared with the control group, notable increases and decreases were observed in the expressions of GSTA3 (3.683 ± 0.636 vs. 0.416 ± 0.507) and LOX (2.104 ± 1.895 vs. 18.804 ± 2.751) in the validated diabetic erectile dysfunction group. The hub OSRGs-related miRNAs participated in smooth muscle cell proliferation. Besides, miR-125a-3p (p = 0.034) and miR-138-2-3p (p = 0.012) were validated as promising oxidative stress-related miRNA biomarkers. Our findings revealed the genetic alternations of oxidative stress in diabetic erectile dysfunction. These results will be instructive to explore the molecular landscape and the potential treatment for diabetic erectile dysfunction.

Retrograde Ejaculation Due to Posterior Urethral Stricture: A Rare Case Report

Pelvic fracture is a serious injury, which has a profound impact on sexual function due to concurrent nervous and urethral injuries. In this case report, we describe a 29-year-old single man who had retrograde ejaculation as a result of a pelvic fracture-related posterior urethral stricture. The patient wanted to improve his ejaculatory ability after experiencing urethral stricture for 8 years and retrograde ejaculation for 3 years following the pelvic fracture. We precisely located and measured the patient's urethral stricture using a retrograde urethrogram, and we used transrectal color Doppler ultrasound to track the patient's ejaculation process in real time. Next, we used urethral balloon dilatation to relieve the urethral stricture. Urinary obstruction symptoms have completely resolved, and the patient was able to urinate without any obstructions. Meanwhile, the real-time transrectal color Doppler ultrasound result showed that some semen might ejaculate externally by passing through the initial stricture area, while some semen continued to flow retrogradely into the bladder.

Lipid metabolism and neuromuscular junction as common pathways underlying the genetic basis of erectile dysfunction and obstructive sleep apnea

Erectile dysfunction (ED) incidence is higher in patients with obstructive sleep apnea (OSA). Studies have suggested that ED and OSA may activate similar pathways; however, few have investigated the links between their underlying genotypic profiles. Therefore, we conducted an in-silico analysis to test whether ED and OSA share genetic variants of risk and to identify any molecular, cellular and biological interactions between them. Two gene lists were manually curated through a literature review based on a PUBMED search, which resulted in one gene list associated with ED (total of 205 genes) and the other with OSA (total of 2622 genes). Between those gene sets, 35 were common for both lists (Fisher exact test, p-value = 0.027). The Protein-protein interaction (PPI) analysis using the intersect list as input showed that 3 of them had direct interactions (LPL, DGKB and PLCB1). In addition, the biological function of the genes contained in the intersect list suggested that pathways related to lipid metabolism and the neuromuscular junction were commonly found in the genetic basis of ED and OSA. From the shared genes between both conditions, the biological pathways highlighted in this study may serve as preliminary findings for future functional investigations on OSA and ED association.

Platelet-rich plasma intracavernosal injections for the treatment of primary organic erectile dysfunction: a systematic review and meta-analysis of contemporary controlled studies

We aim to summarize the latest evidence on platelet-rich plasma (PRP) intracavernosal injections efficacy in men affected by primary organic erectile dysfunction (ED). We reviewed the literature for randomized controlled trials (RCTs) or prospective and retrospective comparative studies evaluating PRP alone or in combination for ED treatment. A comprehensive search in PubMed, Scopus, Web of Science, and ClinicalTrials.gov was performed for English language full-text articles or conference abstracts. A qualitative and quantitative data synthesis was provided. Overall, seven records were included: three RCTs evaluated PRP vs. placebo, one study separately tested PRP and low-intensity shock wave therapy (Li-SWT), three studies compared Li-SWT or low-intensity pulsed ultrasound alone with their combination with PRP. Of 641 included patients, 320 received PRP. Despite the heterogeneity among inclusion criteria, dose and protocol of PRP administration, and outcomes measured, most studies independently reported better sexual outcomes in patients who received PRP, without significant severe side effects. In meta-analysis, where only placebo-controlled studies were included, patients treated with PRP showed higher International Index of Erectile Function (erectile function domain) score compared to patients who received placebo: pooled mean difference (95% Confidence Interval) of 2.99 (1.86, 4.13) after 1 month (209 patients) vs. 2.85 (1.61, 4.09) after 3 months (204 patients) vs. 3.21 (1.82, 4.60) after 6 months (199 patients) of follow-up. In men affected by primary organic ED, PRP intracavernosal injections demonstrated an objective improvement or at least a tendency in erectile function recovery. Patient numbers, and the short-term follow-up may limit the generalizability of these observations. High quality, large-scale, and standardized controlled trials are needed before recommending its definitive use in clinical practice.

Causal relationship between worry, tension, insomnia, sensitivity to environmental stress and adversity, and erectile dysfunction: a study using Mendelian randomization

BACKGROUND

This study aims to investigate the causal relationship between erectile dysfunction (ED) and psychological states including worry, tension, insomnia, sensitivity to environmental stress and adversity (SESA).

METHOD

This study the used two-sample bi-directional Mendelian randomization (MR) method. The study data was obtained from a pooled dataset of genome-wide association studies (GWAS). The bi-directional MR analysis was performed using inverse variance weighting, weighted median method, and MR-Egger regression analysis to assess the causality between ED and psychological states including worry, tension, insomnia, SESA in terms of odd ratios (OR). The study tested for heterogeneity using the Cochran Q method and for multiple validity using the MR-Egger and MR-PRESSO methods.

RESULTS

In forward MR analysis correlating worry, tension, insomnia, and SESA as exposures, no causal relationship was found between worry or tension and ED (p < 0.05). However, insomnia (p = 0.001, OR = 3.441, 95%CI = 1.593-7.435) and SESA (p = 0.004, OR = 1.804, 95%CI = 1.203-2.701) were found to have a significant causal effect on ED risk. The reverse MR analysis with ED as the exposure did not show any significant correlation (all p > 0.05).

CONCLUSION

Individuals with insomnia and SESA are at higher risk for developing ED. Clinical evaluation should be more thorough for these individuals. Insomnia can be treated simultaneously with psychological counseling to reduce the risk of ED. In addition, there is no evidence to suggest that worry and tension increase the risk of ED.

Evaluation of community pharmacy technicians' knowledge, attitudes, and practices about erectile dysfunction and its predictors in Gondar Town: A cross-sectional descriptive study

Background

Erection Dysfunction, which primarily affects males older than 40 years, is the inability to regularly produce or retain a penile erection that is strong enough to satisfy sexual activity.

Objective

To evaluate knowledge, attitudes, and practices related to erectile dysfunction and its predictors among community pharmacy technicians in Gondar, Ethiopia.

Method

We conducted a cross-sectional descriptive study on pharmacy technicians in Gondar from June 1, 2022, to August 30, 2022. The study included 165 respondents and utilized a standardized questionnaire with 42 questions to assess their knowledge (18 items), attitudes (5 items), practices (15 items), and demographic characteristics (4 items) regarding erectile dysfunction. We performed both univariate and multivariate analyses on the collected data.

Results

Multivariate logistic regression analysis showed that greater educational attainment was independently correlated with increased knowledge of erectile dysfunction. For postgraduate pharmacy education, the adjusted odds ratio (AOR) was 0.031 (95 % CI: 0.006-0.170, p < 0.001).Regarding work experience, the adjusted odds ratios (AORs) were as follows: 6.223E-010 (95 % CI: 9.713E-011-3.987E-009, p < 0.001) for 1-5 years, 7.940E-010 (95 % CI: 1.381E-010-4.566E-009, p < 0.001) for 5-10 years, and 6.134E-010 (95 % CI: 1.333E-010-2.824E-009, p < 0.001) for over 10 years.Additionally, respondents with 5-10 years of work experience had an AOR of 8.129 (95 % CI: 1.476-44.786, p = 0.016), and the gender of the participants had an AOR of 3.399 (95 % CI: 1.239-9.325, p = 0.017), both of which were associated with erectile dysfunction behaviors.The aggregate ratings indicated that the participants had moderate knowledge, attitudes, and practices regarding erectile dysfunction. The Pearson Correlation Test revealed a significant positive relationship between knowledge of erectile dysfunction and attitude (r = 0.589 and p < 0.001) and practice (r = 0.524 and p < 0.001). Additionally, attitudes and practices showed a significant positive correlation (r = 0.321, p < 0.001).

Conclusion

The study findings showed that pharmacy technicians have a moderate level of understanding, attitudes, and practices regarding erectile dysfunction. The scores for general erectile dysfunction knowledge, attitude, and practice showed a significant positive association (p < 0.001).

Causal relationship between gut microbiota and male erectile dysfunction: a Mendelian randomization analysis

Background

Several observational studies have reported an association between gut microbiota and male erectile dysfunction (ED). However, it remains unclear whether there is a causal relationship between gut microbiota and male ED. Thus, we aimed to investigate the potential causal relationship between gut microbiota and male ED through Mendelian randomization (MR) analysis.

Objective

To assess the causal relationship between gut microbiota and male ED, we performed a two-sample MR analysis.

Methods

We obtained gut microbiota genome-wide association studies (GWAS) data from the MiBioGen consortium and publicly available GWAS data on male ED from the OPEN GWAS database. Subsequently, we performed a two-sample MR analysis to evaluate the causal relationship between gut microbiota and male ED. Finally, we performed sensitivity analysis, including Cochran's Q test, MR-Egger intercept analysis, MR-PRESSO, and leave-one-out analysis, to assess the level of heterogeneity and horizontal pleiotropy in the results.

Results

Our MR analysis revealed a negative causal relationship between the genus Ruminococcaceae UCG013 and male ED (OR = 0.761, 95% CI 0.626-0.926), while the family Lachnospiraceae, genus Lachnospiraceae NC2004 group, genus Oscillibacter, and genus Tyzzerella3 may be associated with an increased risk of male ED, with the highest risk observed for family Lachnospiraceae (OR = 1.264, 95% CI 1.063-1.504). Furthermore, sensitivity analysis confirmed the reliability of our positive findings.

Conclusion

Our MR analysis revealed a causal relationship between gut microbiota and male ED. This may contribute to a better understanding of the potential applications of gut microbiota in the occurrence and treatment of male ED.

The patient-perceived intravaginal ejaculation latency time cut-off for lifelong premature ejaculation

BACKGROUND

The current cutoff values of intravaginal ejaculation latency time for diagnosing lifelong premature ejaculation do not always match clinical practice, and the inconsistency in the cutoff values of intravaginal ejaculation latency time among different definitions has also posed challenges to both clinical management and research of premature ejaculation.

OBJECTIVES

To re-evaluate the intravaginal ejaculation latency time and to find evidence-based cut-off values for diagnosing lifelong premature ejaculation that can be widely accepted and match clinical practice.

MATERIALS AND METHODS

We addressed the flaws of previous studies. Lifelong premature ejaculation was diagnosed based on both patient self-report of premature ejaculation status and scores on the Premature Ejaculation Diagnostic Tool, with a control group consisting of non-premature ejaculation individuals included for comparison. Utilizing receiver operating characteristic curve analysis, the optimal self-estimated cutoff value for intravaginal ejaculation latency time in diagnosing lifelong premature ejaculation was determined.

RESULTS

A total of 307 heterosexual participants (mean age = 30.7 ± 6.4) were included, comprising 187 lifelong premature ejaculation patients (mean age = 28.0 ± 4.6) and 120 non-premature ejaculation individuals (mean age = 35.0 ± 6.5). 2.7% of lifelong premature ejaculation patients experienced anteportal ejaculation. 59.9%, 92%, and 97.9% of lifelong premature ejaculation patients displayed intravaginal ejaculation latency times within 1, 2, and 3 min, respectively. The receiver-operating characteristic curve's area under the curve was 0.996 with a 95% confidence interval of 0.991-1.000 (p < 0.0001). The perceived intravaginal ejaculation latency time cut-off at 3.5 (sensitivity = 97.9%, specificity = 99.2%) showed the highest Youden index compared with other options.

DISCUSSION

Although we found that 92.0% of lifelong premature ejaculation patients had a perceived intravaginal ejaculation latency time within 2 min, a perceived intravaginal ejaculation latency time cutoff value of less than 3.5 min for diagnosing lifelong premature ejaculation could encompass a larger proportion (97.9%) of patients seeking medical help for complaints of PE, and increasing the perceived intravaginal ejaculation latency time cutoff value to 3.5 min would not significantly increase the false-positive rate.

CONCLUSION

The perceived intravaginal ejaculation latency time cutoff value for diagnosing lifelong premature ejaculation within a clinical practice context is 3.5 min.

Changing trends in penile prosthesis implantation in China and an overview of postoperative outcomes from a single center

BACKGROUND

Surgical penile prosthesis implantation (PPI) procedures have only recently been introduced to mainland China, with the overall number of such procedures having been conducted to date remaining relatively low. Accordingly, relatively little remains known with respect to the annual trends in PPI. Accordingly, this study was developed with the goal of clarifying these trends across different hospitals in mainland China, while also providing a single-center overview of post-PPI patient outcomes.

RESULTS

To identify males in mainland China who had undergone PPI, a retrospective review of data from January 2019 - October 2023 was conducted. This approach revealed an increase in the total PPI caseload from 120 in 2019 to 413 within the first 10 months of 2023. Over this same interval, the number of surgeons performing PPI rose from 33 to 74. A retrospective review of the 112 patients who had undergone PPI at Shanghai General Hospital from 2019-2023 revealed that these patients had a median age of 39 [27-63] years, and PPI treatment led to a significant increase in median International Index of Erectile Function-5 (IIEF-5) scores from a baseline value of 10.23 ± 1.26 to a post-treatment value of 22.6 ± 2.73. The underlying causes of erectile dysfunction for these patients included vasculogenic factors (58/112; 51.8%), diabetes mellitus (21/112; 18.8%), and injuries to the spinal cord or pelvis (14/112; 12.5%). The overall rates of satisfaction with the PPI reported by patients and their partners were 93.0% and 90.4%, respectively, and the 3-year PPI survival rate for this cohort was 87%.

CONCLUSION

These data highlight a rising trend in the number of PPI being performed in China, with these steadily increasing rates since 2019 emphasizing the increasingly high levels of acceptance of this procedure by patients and clinicians as a means of treating erectile dysfunction. However, the expertise is restricted to a small number of surgeons. Even so, it is a safe and efficacious approach to managing severe erectile dysfunction for patients in China, and when performed by experienced surgeons based on standardized protocols, low complication rates can be achieved while providing patients and their sexual partners with high levels of satisfaction.

Clinical outcomes of the Burnett "snake" maneuver shunt modification for ischemic priapism

BACKGROUND

Major ischemic priapism (IP) is defined as a persistent penile erection for >4 hours. IP may cause serious complications, especially if prompt resolution is not achieved. Therefore, selecting the most effective and usable shunt technique is crucial in IP cases that are refractory to medical therapy.

AIM

To compare the effectiveness and complication risks of distal corporoglanular shunt procedures with and without the Burnett "snake" maneuver.

METHODS

We conducted a retrospective study of patients who presented with IP and underwent surgical treatment at our institution between 2005 and 2021. The patients were categorized into 2 groups: group 1 (n = 26) underwent distal shunt + Burnett snake maneuver, and group 2 (n = 56) underwent distal shunt-only. Clinical history, parameters of IP, details of medical and surgical treatments, and follow-up information were evaluated.

OUTCOMES

Outcomes included differences in IP resolution and recurrence, functional erections, and complications between corporoglanular shunt procedures with and without the Burnett snake maneuver.

RESULTS

In group 1, 24 of 26 patients (92.3%) experienced priapism resolution with a single surgical intervention, while this outcome was observed in 30 of 56 patients (53.6%) in group 2 (P < .001). Notably, priapism recurrence was significantly lower in group 1, occurring in 1 of 24 patients (4.2%), as opposed to 8 of 30 patients (26.6%) in group 2 (P < .001). Of the patients with documented sexual function status at follow-up, functional erections (capable of penetration with or without phosphodiesterase 5 inhibitors) were noted in 6 of 14 patients (42.8%) in group 1 and 13 of 26 patients (50%) in group 2 (P = .66).

CLINICAL IMPLICATIONS

This study provides valuable insights regarding technical aspects of distal shunt procedures with and without the Burnett snake maneuver for treating major IP episodes. These results can help surgeons with clinical decision making for patients who present with IP.

STRENGTH AND LIMITATIONS

Limitations include the single-site retrospective design with potential selection bias, inaccuracies in medical record data, challenges in controlling confounding variables, and the lack of validated questionnaire scores for erectile function evaluation.

CONCLUSION

Our study demonstrates that modifying distal shunt procedures using the Burnett snake maneuver significantly improves priapism resolution and effectively prevents further priapism episodes without introducing additional complications or erectile function loss, thereby distinguishing it from distal shunt-only procedures.

Association between the systemic immune-inflammation index and erectile dysfunction: A cross-sectional study

BACKGROUND

Erectile dysfunction (ED) is associated with inflammation. The systematic immune-inflammation index (SII), as a new inflammation marker, was applied to predict the risk of diseases. However, no research explores the relationship between SII and ED. Hence, the purpose of this study was to investigate the association between SII and ED.

METHODS

Related data were obtained from the National Health and Nutrition Examination Survey (NHANES) 2001-2004. Based on self-report, all participants were classified into ED and non-ED group. Weighted multivariate regression analysis the relationship between categorical SII and ED in unadjusted and adjusted models. Restricted cubic spline (RCS) was used to examine the association of continuous SII and ED risk. Furthermore, the association between categorical SII and the risk of ED was evaluated among subgroups of age, body mass index, hypertension, diabetes and cardiovascular disease. Finally, weighted multivariate regression analysis and RCS were performed to assessed the connection between SII and the risk of severe ED.

RESULTS

Initially, data on 21,161 participants were obtained. After implementing the inclusion and exclusion criteria, 3436 participants were included in analyses. Weighted multivariate regression analysis demonstrated that Q4 group SII was associated with an increased risk of ED (OR = 1.03, 95% confidence intervals: 1.00-1.05, p = .03). RCS showed SII was nonlinearly associated with the risk of ED, and the inflection point of SII was at 485.530. In addition, subgroup analyses demonstrated that participants in the SII > 485.530 group had a higher ED risk than SII ≤ 485.530 group among subgroups of age ≥50, hypertension, and non-diabetes. Weighted multivariate regression analysis and RCS found no relationship of SII and the risk of severe ED.

CONCLUSION

In US adults, SII > 485.530 was correlated with an increased risk of ED. While, no significant association between SII and severe ED risk. Additional studies are required to support our results.

Pharmacological management of testosterone deficiency in men current advances and future directions

INTRODUCTION

Testosterone deficiency (TD) is relatively common in aging men, affecting around 2% of the general population. Testosterone replacement therapy (TRT) represents the most common medical approach for subjects who are not interested in fathering.

AREAS COVERED

This review summarizes advances in TRT, including approved or non-approved pharmacological options to overcome TD. When possible, a meta-analytic approach was applied to minimize subjective and biased interpretations of the available data.

EXPERT OPINION

During the last decade, several new TRT formulations have been introduced on the market, including oral, transdermal, and parenteral formulations. Possible advantages and limitations have been discussed appropriately. Anti-estrogens, including selective estrogen modulators or aromatase inhibitors still represent further possible off-label options. However, long-term side effects on sexual function and bone parameters constitute major limitations. Glucagon-like peptide 1 analogues can be an alternative option in particular for massive obesity-associated TD. Weight loss obtained through lifestyle modifications including diet and physical exercise should be encouraged in all overweight and obese patients. A combination of TRT and lifestyle changes can be considered in those subjects in whom a reversal of the condition cannot be expected in a reasonable time frame.

Mode of cell death in the penile cavernous tissue of type 1 diabetes mellitus rats

BACKGROUND

Diabetes mellitus commonly causes endothelial cell and smooth muscle cell death in penile cavernous tissue.

AIM

The study sought to study the mode of cell death in the penile cavernous tissue in type 1 diabetic rats.

METHODS

A total of 36 Sprague Dawley rats 10 weeks of age were randomly divided into 2 groups: a normoglycemic group and type 1 diabetic group (intraperitoneal injection of Streptozotocin (STZ), 60 mg/kg). We randomly selected 6 rats from each group for tests at the end of 11, 14, and 18 weeks of age, respectively. All rats were able to eat and drink freely. The ratio of maximum intracavernous pressure to mean arterial pressure, concentration of serum testosterone, level of nitric oxide in the penile cavernosum, and expression of active caspase-1 (pyroptosis) and active caspase-3 (apoptosis) were determined.

OUTCOMES

At the end of weeks 4 and 8 of type 1 diabetes, the proportions of endothelial cells and smooth muscle cells undergoing apoptosis and pyroptosis in penile cavernous tissue are different.

RESULTS

The ratio of maximum intracavernous pressure to mean arterial pressure and nitric oxide levels were significantly lower in the 4- and 8-week diabetic groups than in the normoglycemic group (P < .01). Penile endothelial cell pyroptosis (5.67 ± 0.81%), smooth muscle cell apoptosis (23.72 ± 0.48%), total cell pyroptosis (9.67 ± 0.73%), and total apoptosis (10.52 ± 1.45%) were significantly greater in the 4-week diabetic group than in the normoglycemic group (P < .01). The proportion of endothelial cell pyroptosis (24.4 ± 3.69%), endothelial cell apoptosis (22.13 ± 2.43%), total cell pyroptosis (14.75 ± 0.93%), and total apoptosis (14.82 ± 1.08%) in the penile tissues of the 8-week diabetic group were significantly greater than those in the normoglycemic group (P < .01).The 8-week survival proportions of diabetic endothelial cells (38.86 ± 8.85%) and smooth muscle cells (44.46 ± 2.94%) was significantly lower than the 4-week survival proportions of endothelial cells (93.17 ± 8.07%) and smooth muscle cells (75.12 ± 4.76%) (P < .05).

CLINICAL TRANSLATION

Inhibition of cell death by different methods at different stages may be the key to the treatment of type 1 diabetes-induced erectile dysfunction.

STRENGTHS AND LIMITATIONS

The effect of type 1 diabetes on other types of cell death in penile cavernous tissue needs further study.

CONCLUSION

The mode of death of endothelial cells in the cavernous tissue of the penis in the early stage in diabetic rats is dominated by pyroptosis, and the death of smooth muscle cells is dominated by apoptosis. Endothelial cell and smooth muscle cell death are not consistent at different stages of diabetes progression.