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Second to fourth digit ratio： a predictor of adult penile ength

Asian Journal of Andrology 2011年第5期13卷 710-714页

作者： In Ho Choi khae hawn kim Han Jung Sang Jin Yoon Soo Woong kim Tae Beom kim Department of Urology Gachon University Gil Hospital Incheon Korea Department of Urology Seoul National University College of Medicine Seoul Korea

The second to fourth digit ratio （2D：4D） has been proposed as a putative biomarker for prenatal testosterone and covaries with the sensitivity of the androgen receptor （AR）. Both prenatal testosterone and the AR play a central role in penile growth. In this study, we investigated the relationship between digit ratio and penile length. Korean men who were hospitalized for urological surgery at a single tertiary academic centre were examined in this study, and 144 men aged 20 years or older who gave informed consent were prospectively enrolled. Right-hand second- and fourth-digit lengths were measured by a single investigator prior to measurement of penile length. Under anaesthesia, flaccid and stretched penile lengths were measured by another investigator who did not measure nor have any the information regarding the digit lengths. Univariate and multivariate analysis using linear regression models showed that only height was a significant predictive factor for flaccid penile length （univariate analysis： r=0. 185, P=-0.026; multivariate analysis： r=-0.172, P=0.038） and that only digit ratio was a significant predictive factor for stretched penile length （univariate analysis： r=-0.216, P=0.009; multivariate analysis： r=-0.201, P=0.024; stretched penile length=-9.201 xdigit ratio ＋ 20.577）. Based on this evidence, we suggest that the digit ratio can predict adult penile size and that the effects of prenatal testosterone may in part explain the differences in adult penile length.

关键词： digit ratio flaccid penile length stretched penile length

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Neuroprotective effects of tadalafil on gerbil dopaminergic neurons following cerebral ischemia

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Neural Regeneration Research 2013年第8期8卷 693-701页

作者： Kwang Taek kim Kyung Jin Chung Han Sae Lee Il Gyu Ko Chang Ju kim Yong Gil Na khae hawn kim Department of Urology Gachon University Gil Medical CenterGachon University Department of Physiology College of MedicineKyung Hee University Department of Urology Chungnam National University HospitalChungnam National University School of Medicine

Impairment of dopamine function, which is known to have major effects on behaviors and cognition, is one of the main problems associated with cerebral ischemia. Tadalafil, a long-acting phosphodiesterase type-5 inhibitor, is known to ameliorate neurologic impairment induced by brain injury, but not in dopaminergic regions. We investigated the neuroprotective effects of treatment with tadalafil on cyclic guanosine monophosphate level and dopamine function following cerebral ischemia. Forty adult Mongolian gerbils were randomly and evenly divided into five groups （n = 8 in each group）： Sham-operation group, cerebral ischemia-induced and 0, 0.1, 1, and 10 mg/kg tadalafil-treated groups, respectively. Tadalafil dissolved in distilled water was administered orally for 7 consecutive days, starting 1 day after surgery. Cyclic guanosine monophosphate assay and immunohistochemistry were performed for thyrosine hydroxylase expression and western blot analysis for dopamine D2 receptor expression. A decrease in cyclic guanosine monophosphate level following cerebral ischemia was found with an increase in thyrosine hydroxylase activity and a decrease in dopamine D2 receptor expression in the striatum and substantia nigra region. However, treatment with tadalafil increased cyclic guanosine monophosphate expression, suppressed thyrosine hydroxylase expression and increased dopamine 92 receptor expression in the striatum and substantia nigra region in a dose-dependent manner. Tadalafil might ameliorate cerebral ischemia-induced dopaminergic neuron injury. Therefore, tadalafil has the potential as a new neuroprotective treatment strategy for cerebral ischemic injury.

关键词： neural regeneration brain injury cerebral ischemia Tadalafil phosphodiesterase type-5 inhibitor dopamine dopamine D2 receptor cyclic guanosine monophosphate grants-supported paper photographs-containing paper neuroregneration

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Neuroprotective effects of tamsulosin on intracerebral hemorrhage

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Neural Regeneration Research 2011年第32期6卷 2505-2510页

作者： Hong-Jin Suh Sung-Min So Young-Gil Na Il-Gyu Ko Sung-Eun kim Yun-Hee Sung Mal-Soon Shin Chang-Ju kim Young-Sam Cho khae-hawn kim Department of Urology Incheon St. Mary's Hospital the Catholic University of Korea School of Medicine Department of Urology Chungnam National University School of Medicine Department of Physiology Kyung Hee University School of Medicine Department of Urology Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Department of Urology Gachon University Gil Hospital Gachon University of Medicine and Science

The alpha1 adrenoreceptor antagonist tamsulosin is primarily used to treat benign prostatic hypertrophy. In this study, we intragastrically administered rats with 0.01,0.1 and 1 mg/kg tamsulosin to investigate the effects of tamsulosin on memory function, and hippocampal cell apoptosis and proliferation following intracerebral hemorrhage. Step-down avoidance task results showed that tamsulosin treatment markedly alleviated intracerebral hemorrhage- induced short-term memory impairment. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling results showed that tamsulosin treatment markedly suppressed intracerebral hemorrhage-induced caspase-3 expression in the hippocampal CA1 region and cell proliferation in the hippocampal dentate gyrus. Tamsulosin treatment at a dose of 0.01 mg/kg exhibited the most potent inhibitory effects on cell apoptosis and proliferation. These findings suggest that tamsulosin treatment facilitates the recovery of rat memory function by inhibiting hippocampal cell apoptosis and proliferation followincl intracerebral hemorrhaQe.

关键词： tamsulosin, intracerebral hemorrhage short-term memory apoptosis cellproliferation hippocampus neural regeneration

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