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BackgroundIn relation to neurodevelopmental hypothesis in the etiology of schizophrenia， brain-derived neurotrophic factor （BDNF） as a neurotrophin occupies a relatively dominant position in neuronal development and is a potential biomarker for schizophrenia， and previous studies have suggested that its serum concentration and genetic polymorphisms play a vital role in the pathogenesis of schizophrenia， but this remains controversial. ObjectiveTo analyze the difference in BDNF serum concentration between schizophrenic patients and healthy controls， and to explore the correlation of three BDNF single nucleotide polymorphism （SNPs） including rs11030101， rs2030324 and rs6265 with BDNF serum concentration and clinical symptoms in patients with schizophrenia， thus providing references for the clinical treatment of schizophrenia. MethodsA case-control study was conducted on 55 patients with schizophrenia who attended the Zhongshan Third People's Hospital from January 2019 to December 2020 and met the Diagnostic and Statistical Manual of Mental Disorders， fifth edition （DSM-5）， and 31 healthy controls concurrently recruited from the hospital or general population. Positive and Negative Symptom Scale （PANSS） was utilized to evaluate the psychiatric symptoms of patients with schizophrenia. BDNF serum concentration in all participants was measured using enzyme-linked immunosorbent assay （ELISA）， and the genotype distributions of three BDNF SNPs （rs11030101， rs2030324， rs6265） were investigated by polymerase chain reaction sequence-based typing method. ResultsBDNF serum concentration in patient group was lower than that in control group， with statistical difference （t=-3.804， P<0.01）. In terms of clinical symptoms， PANSS total score， excitement/hostility domain score， and depression/anxiety domain score demonstrated statistical difference among patients with different genotypes at SNP rs11030101 （t=2.022， Z=-2.696， -2.467， P<0.05 or 0.01）. No statistical difference was noted in BDNF serum concentration in patients with different genotypes at three BDNF SNPs （Z=1.483， F=2.584， 0.417， P>0.05）. ConclusionPatients with schizophrenia are found to have low BDNF serum concentration， and the three BDNF SNPs （rs11030101， rs2030324， rs6265） are not associated with BDNF serum concentration， whereas the BDNF rs11030101 polymorphism may contribute to the manifestation of clinical symptoms of excitement/hostility and depression/anxiety in patients with schizophrenia. Furthermore， BDNF serum concentration seems to be more dependent on clinical diagnosis effect rather than genetic polymorphism. ［Funded by Guangdong Province Medical Science and Technology Research Fund Project （number， A2021205）； Zhongshan Medical Research Program （number， 2022J221）］
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PURPOSE: To evaluate the combined role of mescenchymal stem cells (MSCs) infected with recombinant adenoviruses expressing human BDNF (rAd/hBDNF) on the erectile dysfunction in rat with cavernous nerve injury. MATERIALS AND METHODS: Rats divided into 4 groups: control group, bilateral cavernous nerve crushing group (BCNC group), BCNC with MSCs group and BCNC with MSCs infected with rAd/hBDNF group. After 4-week, functional assessment was done. PKH26 and BDNF staining of major pelvic ganglion and masson's trichrome staining of corpus cavernosum were performed. Western blot analysis of endothelial nitric oxide synthase (eNOS) and neuronal nitric oxide synthase (nNOS) was done in corpus cavernosum. RESULTS: After 4 weeks, BCNC with MSCs and MSCs infected with rAd/hBDNF groups showed significantly well-preserved erectile function compared with BCNC group. Moreover, the erectile function of MSCs infected with rAd/hBDNF group was significantly well-preserved than BCNC with MSCs group. The smooth muscle of corpus cavernosum was significantly preserved in BCNC with MSCs and MSCs infected with rAd/hBDNF groups compared with BCNC group. More preservation of smooth muscle was observed in rats with MSCs infected with rAd/hBDNF than with MSCs alone. Significant increase expression of eNOS and nNOS was noted in rats with MSCs infected with rAd/hBDNF than with MSCs alone. CONCLUSIONS: The erectile function was more preserved after injection with MSCs infected with rAd/hBDNF in rat with ED caused by cavernous nerve injury. Therefore, the use of MSC infected with rAd/hBDNF may have a better treatment effect on ED cause by cavernous nerve injury.