Quantitative analyses of T cell motion in tissue reveals factors driving T cell search in tissues.

T cells are required to clear infection, and T cell motion plays a role in how quickly a T cell finds its target, from initial naive T cell activation by a dendritic cell to interaction with target cells in infected tissue. To better understand how different tissue environments affect T cell motility, we compared multiple features of T cell motion including speed, persistence, turning angle, directionality, and confinement of T cells moving in multiple murine tissues using microscopy. We quantitatively analyzed naive T cell motility within the lymph node and compared motility parameters with activated CD8 T cells moving within the villi of small intestine and lung under different activation conditions. Our motility analysis found that while the speeds and the overall displacement of T cells vary within all tissues analyzed, T cells in all tissues tended to persist at the same speed. Interestingly, we found that T cells in the lung show a marked population of T cells turning at close to 180o, while T cells in lymph nodes and villi do not exhibit this "reversing" movement. T cells in the lung also showed significantly decreased meandering ratios and increased confinement compared to T cells in lymph nodes and villi. These differences in motility patterns led to a decrease in the total volume scanned by T cells in lung compared to T cells in lymph node and villi. These results suggest that the tissue environment in which T cells move can impact the type of motility and ultimately, the efficiency of T cell search for target cells within specialized tissues such as the lung.

Streptomycin affects the growth and photochemical activity of the alga Chlorella vulgaris.

Antibiotics are increasingly being used in human and veterinary medicine, as well as pest control in agriculture. Recently, their emergence in the aquatic environment has become a global concern. The aim of this study was to evaluate the effect of streptomycin on growth and photosynthetic activity of Chlorella vulgaris after 72h exposure. We found that growth, photosynthetic activity and the content of the D1 protein of photosystem II decreased. Analysis of chlorophyll a fluorescence emission shows a reduction in the energy transfer between the antenna complex and reaction center. Also the activity of the oxygen evolution complex and electron flow between QA and QB were significantly reduced; in contrast, we found an increase in the reduction rate of the acceptor side of photosystem I. The foregoing can be attributed to the inhibition of the synthesis of the D1 protein and perhaps other coded chloroplast proteins that are part of the electron transport chain which are essential for the transformation of solar energy in the photosystems. We conclude that micromolar concentrations of streptomycin can affect growth and photosynthetic activity of Chlorella vulgaris. The accumulation of antibiotics in the environment can become an ecological problem for primary producers in the aquatic environment.

[Fallopian tube primary invasive adenocarcinoma associated with acute inflammatory pelvic disease. Case report and literature review]. / Adenocarcinoma invasor primario de trompa de falopio concomitante con enfermedad pélvica inflamatoria aguda. Comunicación de un caso y revisión de la bibliografía.

The primary fallopian tube invader adenocarcinoma is a preoperative diagnosis rarely reported in the literature, because is the most uncommon of all gynecological tumors, with prevalence from 0.3 to 1.8%. Since its clinical evolution is very unspecific, in general this tumor is diagnosed during a laparothomy for other purpose or by the pathologist in the final histopathological report. The most frequent signs and symptoms are abdominal pain or a pelvic mass in 80% of cases; transvaginal bleeding in 50%, intense transvaginal serohematic discharge (hidrops tubae profluens) in 11.1%, and peritonitis in pelvis in 3.7%. In 25 to 60% of the cases a report of adenocarcinoma in the pap smear with negative endometrial biopsy can be found. The treatment is predominantly surgical, as that of epithelial ovarian carcinoma, and consists of an intraperitoneal washing, total abdominal hysterectomy with bilateral salpingo-oophorectomy and a proper staging. It is required an omentectomy with pelvic and paraaortic lymphadenectomy in systematic way. In the more advanced stages III and IV that required a radical debulking, we have to be very emphatic in citoreduction. In some cases, as the persistence or recurrence of illness, it can be necessary adjuvant chemotherapy. In some patients in early stage I or II with low risk, the complete staging could not be necessary. There is controversy about administration criteria of adjuvant treatment, since there is not evidence of survival increase related to its use. The five years survival rate was 64% for stage I, 42% for stage II, 32% for stage III, and 17% for stage IV. Fallopian tube malignancies are rare and involve a poor prognosis.