More than half of the men in a Swedish population of men aged 55, 65 and 75 believe in 'a male climacteric'

PPL2ab neurons restore sexual responses in aged Drosophila males through dopamine

Male sexual desire typically declines with ageing. However, our understanding of the neurobiological basis for this phenomenon is limited by our knowledge of the brain circuitry and neuronal pathways controlling male sexual desire. A number of studies across species suggest that dopamine (DA) affects sexual desire. Here we use genetic tools and behavioural assays to identify a novel subset of DA neurons that regulate age-associated male courtship activity in Drosophila. We find that increasing DA levels in a subset of cells in the PPL2ab neuronal cluster is necessary and sufficient for increased sustained courtship in both young and aged male flies. Our results indicate that preventing the age-related decline in DA levels in PPL2ab neurons alleviates diminished courtship behaviours in male Drosophila. These results may provide the foundation for deciphering the circuitry involved in sexual motivation in the male Drosophila brain.

We currently lack a detailed understanding of the neurobiological basis for the decline of male sexual desire with age. Here the authors demonstrate that restoring impaired dopaminergic signalling in a specific cluster of neurons in the Drosophila brain increases sexual behaviour in ageing male flies.

Different levels of awareness and knowledge of male climacteric in female nurses and female office workers

OBJECTIVE

The objective of this study was to examine levels of awareness and knowledge regarding male climacteric or andropause in Japanese women. We also examined whether there are differences in these levels between nurses as a health profession group and office workers as a general population group.

METHODS

Two thousand and eight hundred female registered nurses and women with office-related general occupations aged 20-65 years in Japan completed health questionnaires regarding awareness and knowledge of male climacteric, including male menopausal symptoms and treatments.

RESULTS

The proportion in women who had heard of the term male climacteric in nurses was significantly higher than that in office workers. Nurses with past or current experience of menopausal symptoms were likely to recognize male climacteric. Nurses also had a higher level of knowledge than did office workers regarding male menopausal symptoms. High proportions of both nurses and office workers acknowledged depressed mood, irritability, nervousness and sleep problems as male menopausal symptoms. The proportions of women with sympathy for men with male climacteric were high in women with experience of past or current menopausal symptoms and in women who were close to men who suffered from menopausal symptoms.

CONCLUSIONS

Nurses with past or current experience of menopausal symptoms had high levels of awareness and knowledge of male climacteric. To spread more information and knowledge regarding male climacteric, provision of education for these nurses may be needed.

Validity and reliability of male andropause symptoms self-assessment questionnaire among elderly males in Khuzestan province of Iran

Background:

Andropause is a condition of decreasing testosterone in men that usually begins to occur at about 40 years of age. Many men find it difficult to acknowledge there may be a problem by refusing to even talk about the symptoms.

Aims:

The study was conducted to the standards of MASSQ (2012) within male older adults to introduce a relevant criterion.

Materials and Methods:

About 382 men with age range of 50-80 and with the mean age of 65.3 ± 2.32 were sampled with the cluster-ratio sampling method from the eight cities of Khuzestan province in southwestern Iran. The aged samples replied to the 25 items of MASSQ.

Results:

Coefficients of Cronbach's alpha (α = 0.89), split-half (0.91), convergent validity (0.72), divergent validity (−0.32), and criterion validity (0.67) were estimated, which were significant at P < 0.01. The exploratory factor analysis demonstrated that the 25-items of MASSQ for aged samples are organized into four factors (sexual, somatic, psychic, and behavioral) which clarify 79% of the scale's variance. Second-order confirmatory factor analysis pointed out that the factors are well-matched up onto a principal factor. Consequently, the four-factor model was well appropriate for the data by the fit index techniques for adjusting the scale [adjusted goodness of fit index = 0.92, goodness-of-fit statistic = 0.91, root mean square error of approximation = 0.006, incremental fit index = 0.94, normed fit index = 0.91, comparative fit index = 0.97].

Conclusions:

The results pointed to the well-adjusted reliability and validity of MASSQ and its usefulness for the relevant studies as well.

Impact of a physician-supervised exercise-nutrition program with testosterone substitution in partial androgen-deficient middle-aged obese men

Background

Partial androgen deficiency syndrome in the aging male is associated with signs of aging such as a development of abdominal obesity, sexual dysfunction, increase body fat, weight gain and the development of cardiac disease.

Objective

We assessed the outcome of a commercially available physician supervised nutrition and exercise program with concomitant testosterone replacement therapy in middle age obese men with partial androgen deficiency in order to reduce cardiac risks factors.

Methods

Fifty-six self referred men without diabetes mellitus, hypertension, or cardiovascular disease (ages 52.3 ± 7.8 years) were randomly selected from a large cohort. Baseline weight, body fat composition, fasting glucose, hemoglobin A1c and fasting lipid levels, as well as free and total testosterone levels were assessed. All patients were assessed and followed 6–18 months after initiation of the program. The program consisted of a low glycemic load balanced nutrition diet, a recommended structured daily exercise program of 30–60 minutes, as well as once to twice weekly intramuscular testosterone injections (113.0 ± 27.8 mg).

Results

At follow up, weight was reduced from 233.9 ± 30.0 pounds (lbs) to 221.3 ± 25.1 lbs (P < 0.001), BMI was reduced from 33.2 ± 3.3 kg/m² to 31.3 ± 2.8 kg/m² (P < 0.0001). Total body fat was 27.1% ± 5.2% vs. 34.3% ± 5.7% at baseline (P < 0.0001). Fasting glucose was reduced from 95.3 ± 14.4 mg/dL to 87.5 ± 12.6 mg/dL (P < 0.0001). Total cholesterol was reduced from 195.4 ± 33.0 mg/dL to 172.7 ± 35.0 mg/dL (P < 0.005). No clinically significant adverse events were recorded.

Conclusions

Testosterone replacement therapy in middle aged obese men with partial androgen deficiency appeared safe and might have promoted the effects of a weight reduction diet and daily exercise program as long as an adequate physician supervision and follow up was granted. The combination therapy significantly reduced coronary risk factors such as glucose intolerance and hyperlipidemia.