Transmission of Human Herpesvirus Type 8 Infection Within Families in American Indigenous Populations From the Brazilian Amazon

Background. The intrafamilial dynamics of endemic infection with human herpesvirus type 8 (HHV-8) in Amerindian populations is unknown. Methods. Serum samples were obtained from 517 Amerindians and tested for HHV-8 anti-latent nuclear antigen (anti-LANA) and antilytic antibodies by immunofluorescence assays. Logistic regression and mixed logistic models were used to estimate the odds of being HHV-8 seropositive among intrafamilial pairs. Results. HHV-8 seroprevalence by either assay was 75.4% (95% confidence interval [CI]: 71.5%-79.1%), and it was age-dependent (P-trend<.001). Familial dependence in HHV-8 seroprevalence by either assay was found between mother-offspring (odds ratio [OR], 5.44; 95% CI: 1.62-18.28) and siblings aged >= 10 years (OR 4.42, 95% CI: 1.70-11.45) or siblings in close age range (<5 years difference) (OR 3.37, 95% CI: 1.21-9.40), or in families with large (>4) number of siblings (OR, 3.20, 95% CI: 1.33-7.67). In separate analyses by serological assay, there was strong dependence in mother-offspring (OR 8.94, 95% CI: 2.94-27.23) and sibling pairs aged >= 10 years (OR, 11.91, 95% CI: 2.23-63.64) measured by LANA but not lytic antibodies. Conclusions. This pattern of familial dependence suggests that, in this endemic population, HHV-8 transmission mainly occurs from mother to offspring and between close siblings during early childhood, probably via saliva. The mother to offspring dependence was derived chiefly from anti-LANA antibodies.

Mastopexia após perda ponderal maciça: suspensão dérmica, remodelação do parênquima e aumento com tecido autógeno

INTRODUÇÃO: Pacientes com perda ponderal significativa podem apresentar mamas com ptose acentuada, perda de projeção do polo superior e excesso de tecido na porção toracolateral. Rubin & Khachi descreveram técnica de mastopexia com suspensão dérmica e remodelação do parênquima associada a aumento com tecido autógeno, tratando a deformidade mamária e o excesso toracolateral em um só estágio. Neste trabalho, é ilustrada essa técnica cirúrgica e demonstradas sua reprodutibilidade e suas complicações. MÉTODO: Foram operadas 14 pacientes com deformidade graus 2 e 3 pela Escala de Pittsburgh, no Hospital Estadual de Sapopemba (São Paulo, SP, Brasil), no período de dezembro de 2008 a dezembro de 2009, utilizando a técnica referida. Foram analisados os seguintes dados: tipos de deformidade das mamas, translocação do complexo areolopapilar (CAP), dimensões dos retalhos, tempo cirúrgico, tempo de permanência do dreno e incidência de complicações. RESULTADOS: A média de idade das pacientes foi de 41,21 + 7,67 anos e o índice de massa corporal médio foi de 29,30 + 2,77. O tempo de seguimento das pacientes variou de 3 meses a 18 meses, com média de 8 meses. Dentre as 14 pacientes operadas, 4 (28,6%) apresentavam deformidade grau 3 e 10 (71,4%), grau 2. A média de translocação do CAP foi de 6,38 cm. As dimensões médias do retalho foram de 25,21 cm x 6,92 cm. O tempo cirúrgico médio foi de 188,57 minutos. Os drenos permaneceram, em média, por 6,21 dias. Foram observadas as seguintes complicações: epiteliose de CAP, deiscência na junção do T, hematoma pequeno e linfedema toracolateral. CONCLUSÕES: A mastopexia com suspensão dérmica, remodelação do parênquima e aumento com tecido autólogo é uma técnica reprodutível, rápida e com baixo índice de complicações.

Searching for resonances in the unbound Be-6 nucleus by using a radioactive Be-7 beam

Knowledge of the He-3(He-3,2p)He-4 reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the He-3 + He-3 (Be-6) system or electron screening. In the Be-6 nucleus, however, no excited states have been observed above the first 2(+) state at E (x) = 1.67 MeV up to 23 MeV, even though several are expected. The H-2(Be-7,H-3)Be-6 reaction has been studied for the first time to search for resonances in the Be-6 nucleus that may affect our understanding of the He-3(He-3,2p)He-4 reaction. A 100-MeV radioactive Be-7 beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD2 targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.

Prognostic significance of CD24 and claudin-7 immunoexpression in ductal invasive breast cancer

This study aimed to identify the CD24 and CD44 immunophenotypes within invasive ductal breast carcinoma (I DC) subgroups defined by immunohistochesmistry markers and to determine its influence on prognosis as well as its association with the expression of Ki-67, cytokeratins (CK5 and CK 18) and claudin-7. Immunohistochemical expression of CD44 and CD24 alone or in combination was investigated in 95 IDC cases arranged in a tissue microarray (TMA). The association with subgroups defined as luminal A and B; HER2 rich and triple negative, or with the other markers and prognosis was analyzed. CD44(+)/CD24(-) and CD44(-)/CD24(+) were respectively present in 8.4% and 16.8% of the tumors, a lack of both proteins was detected in 6.3%, while CD441(-)/CD24(+) was observed in 45.3% of the tumors. Although there was no significant correlation between subgroups and different phenotypes, the CD44(+)/CD24(-) phenotype was more common in the basal subgroups but absent in HER2 tumors, whereas luminal tumors are enriched in CD44(-)/CD24(+) and CD44(+)/CD24(+) cells. The frequency of CD44(+)/CD24(-) or CD44(-)/CD24(+) was not associated with clinical characteristics or biological markers. There was also no significant association of these phenotypes with the event free (DFS) and overall survival (OS). Single CD44(+) was evident in 57.9% of the tumors and was marginally associated to grading and not to any other tumor characteristics as well as OS and DFS. CD24(+) was positive in 74.7% of the tumors, showing a significant association with estrogen receptor, progesterone receptor and Ki-67 and a marginal association with CKI8 and claudin-7. Expression of claudin-7 and Ki-67 did not associate with the cancer subgroups, while a positive association between CK18 and the luminal subgroups was found (P=0.03). CK5, CK18 and Ki-67 expression had no influence in OS or DFS. Single CD24(+) (P=0.07) and claudin-7 positivity (P=0.05) were associated with reduced time of recurrence, suggesting a contribution of these markers to aggressiveness of breast cancer.