To investigate the expression change of BDNF in lamina II of spinal cord from partial deafferented cats, L6 segmentsof spinal cord from 20 adult male cats (5 normal cats, 15 unilateral L6 spared roots cats allowed to survive 3 d, 6 d and 12 d re-spectively) were stained with immunohistochemical technique. The results showed: BDNF positive products were mainly dis-tributed in nerve terminals, varicosities and few neurons of spinal cord lamina II in normal cat. After operation, the density ofpositive nerve terminals and varicosities began to decrease on the third day, reached the lowest level on the 6th day and recoveredto normal level on the 12th day on operated side. But the number of BDNF neurons showed no obvious change. The authors sug-gest that the decreased density of BDNF positive products in lamina II on the 3rd and 6th day was related with the degenerationof the nerve fibers and varicosities after section of the adjacent dorsal roots. On the 12th day, the remaining L6 dorsal roots un-derwent collateral sprouting compensatoryly and reestablished functional connection with target neurons. Therefore, BDNF maybe involved in the normal physiological function and the plasticity of spinal cord after damage.

Objective The objective of this study was to compare the short-term efficacy and adverse reactions of nituzum-ab combined with synchronous radiotherapy and chemotherapy and bevacizumab combined with synchronous radiotherapy and chemo-therapy in the treatment of locally advanced cervical cancer.Methods A total of 100 locally advanced cervical cancer patients with pathological type of squamous cell carcinoma were collected from 1 September 2020 to 31 December 2021.They were divided into a control group(synchronous radiotherapy and chemotherapy group),a nituzumab group(nituzumab combined synchronous radiotherapy group)and a bevacizumab group(bevacizumab combined synchronous radiotherapy and chemotherapy group).The total effective rate of short-term treatment,changes in tumor volume before and after treatment,serum squamous cell carcinoma antigen(SCC)levels be-fore and after treatment,and adverse reactions after treatment were compared among patients of the three groups.Results The short-term total effective rates of the Nitro group,Bevar group and control group were 90.3％,87.2％and 60.0％,respectively.The total effective rates of the Nitro and Bevar groups were significantly higher than those of the control group,and the differences were statisti-cally significant(P＜0.001).There was no statistically significant difference in the total effective rates of the Nitro and Bevar groups(P＞0.05);The degree of tumor volume reduction and SCC reduction in the Nituo group and Bevac group after treatment was higher than those in the control group(P＜0.05),and there was no statistically significant difference between the two groups(P＞0.05).The incidence of hypertension in the Bevar group was 33.4％,significantly higher than that in the control group(10.0％)and the Ni-tro group(12.9％)(P＜0.05).There was no statistically significant difference in the incidence of hypertension between the Nito group and the control group(P＞0.05);There was no statistically significant difference in the incidence of adverse reactions among the three groups except hypertension(P＞0.05).Conclusion Nituzumab combined with synchronous radiotherapy and chemothera-py,as well as bevacizumab combined with synchronous radiotherapy and chemotherapy,can improve the short-term efficacy of locally advanced cervical cancer,effectively reduce tumor volume and inhibit the expression of tumor markers,both of which are superior to synchronous radiotherapy and chemotherapy alone.Compared to bevacizumab,nituzumab has fewer adverse reactions.For patients with locally advanced cervical cancer,the combination of nituzumab and concurrent radiotherapy and chemotherapy is more reliable in terms of safety.