Individual and Joint Acute Toxicities of Selected Insecticides Against Bombyx mori (Lepidoptera: Bombycidae).

As widely used pesticides, organophosphate, pyrethroid, and neonicotinoid insecticides have different modes of action. In the present study, we evaluated individual and joint acute toxicities of two organophosphates, two pyrethroids, and two neonicotinoids against the second-instar silkworm by feeding silkworm with the insecticide-treated mulberry leaves. The 96-h lethal concentration 50 (LC(50)) values of chlorpyrifos, acephate, imidacloprid, thiamethoxam, cypermethrin, and deltamethrin against silkworm were 3.45 (2.95-4.31), 44.45 (39.34-48.56), 1.27 (1.19-1.35), 2.38 (2.19-2.54), 0.36 (0.30-0.43), and 0.037 (0.033-0.041) mg/liter, respectively. Moreover, the 96-h LC(50) values of 50:50 binary mixtures of insecticides against silkworm ranged from 0.048 (0.043-0.054) to 3.52 (2.09-4.51) mg/liter. In addition, the combination coefficient (Q) values of all tested mixtures ranged from 0.36 to 3.37. According to the obtained Q values, the binary mixture of deltamethrin-chlorpyrifos showed antagonistic effects at 96-h interval, while the other binary mixtures had additive effects. Taken together, our results provided valuable guidelines in assessing the ecological risk of these insecticide mixtures against silkworm.

Germline mutation analysis in the CYLD gene in Chinese patients with multiple trichoepitheliomas.

Trichoepithelioma is a benign neoplasm that primarily shows follicular germinative differentiation. Classic trichoepithelioma typically presents as a skin-colored papule or nodule on the face or upper trunk; lesions have a predilection for the nose. Trichoepithelioma can be sporadic or familial and solitary or multiple. Most previously reported multiple trichoepithelioma cases are familial, and germline CYLD mutations could be detected in some patients. We performed mutational analysis of the germline CYLD gene in 8 Chinese multiple trichoepitheliomas patients, 6 of which were sporadic cases. A heterozygous missense mutation (c.1112C>A) in the 9th exon of the CYLD gene was detected in some mother-daughter patients. However, the germline CYLD mutation could not be detected in the 6 non-familial cases. The results suggest that the pathogenesis of sporadic multiple trichoepitheliomas may differ from that of familial cases. Our findings also further confirmed the genetic heterogeneity of multiple trichoepitheliomas.

[Twelve cases of malignant hematopathy treated by combined therapy of hematopoietic stem cell transplantation and Chinese herbal medicine].

OBJECTIVE: To evaluate the effect of hematopoietic stem cell transplantation combined with Chinese herbal medicine in treating malignant hematopathy. METHODS: Allo-bone marrow transplantation (Allo-BMT) or alloperipheral blood stem cell transplantation (Allo-PBSCT), with conditioning regimen of TBI + Cy or Bu + Cy, was used to treat 4 cases of chronic granulocytic leukemia (CGL, 3 of chronic phase and 1 of acceleration phase) and one case of acute non-lymphocytic leukemia (ANLL). And auto-BMT or auto-PBSCT, with conditioning regimen of MAC or MAC + VP16, was used to treat 7 cases of hematopathy, including 5 cases of ANLL (3 of CR1 and 2 of CR2) and 2 cases of malignant lymphoma (1 of first occurring and 1 of relapse). Chinese herbal medicine was given orally to all the 12 patients after' transplantation according to TCM Syndrome Differentiation. RESULTS: All patients were successfully engrafted. Within the median follow-up period of 18 (4-70) months, one patient (8.3%) died of transplantation-related death, 3(25.0%) relapsed and 8 (66.7%) survived free of original disease. The transplantation effective rate was 88.8% as counting by ANLL CR1 and CGL chronic phase. CONCLUSION: Auto-BMT or auto-PBSCT in CR1 stage of acute leukemia could reduce the relapse rate, when there was no matched bone marrow donor; allo-BMT or allo-PBSCT in chronic stage could result in long-term disease-free survival of patients; Chinese herbal medicine administration in patients of malignant hematopathy might reduce the complications and plays certain role in promoting recovery of hematopoietic function.

[A study of classification and treatment of combined traditional Chinese medicine and Western medicine of 69 cases of aplastic anemia].

Hemopoietic progenitor cells (BFU-E, CFU-E and CFU-GM) of 69 cases of aplastic anemia were cultured in vitro while the sensitivity of CFU-E and BFU-E to androgen was assayed. The suppressive effect of peripheral blood mononuclear cell (PBMNC) from patients on normal CFU-GM growth was also studied. Hence 69 cases of aplastic anemia were divided into three types: 10 cases of stem cell deficiency type, 30 cases of immuno-mediated type and 29 cases of androgen response type. According to above classification, different treatment programs were practiced using both TCM and western medicine. In the androgen response type, androgen and TCM were used and the effective rate reached 92.3%. In the immuno-mediated type, in addition to TCM. Immunosuppressive agents were cautiously used and the effective rate was 70.6%. As for the stem cell deficiency type, 10 patients' conditions were usually very severe so comprehensive therapeutical means were adopted and 3 cases were improved. The overall response rate of these three was 73.2%. These results showed that the treatment program under the direction of classification have greatly improved the curative effect.