ABSTRACT
Resumen En el presente trabajo, se registra por primera vez floraciones algales nocivas del dinoflagelado Blixaea quinquecornis (Abé) Gottschling, 2017 para aguas costeras del mar peruano. La determinación taxonómica de esta especie se realizó mediante microscopia de luz, electrónica de barrido y contraste interferencial diferencial (DIC). La fórmula tecal encontrada fue: pp, 3', 2a, 7'',5c, 5"' y 2''' 4s. Blixaea quinquecornis fue registrada en las bahías Sechura, Miraflores y Paracas entre el 2014 y 2017, usualmente con altas densidades de 3.2 x105 cel.L-1 (Miraflores) y 2.11x105 cel.L-1 (Paracas) en verano y 4.11 x104 (Paracas) en otoño 2016. Blixaea quinquecornis estuvo alternando con floraciones algales del dinoflagelado atecado Akashiwo sanguinea. El florecimiento de B. quinquecornis se observó con TSM entre 18.5 a 26.6 °C, salinidades entre 34.70 y 35.32 ups, pH entre 7.32 y 8.82 y oxígeno disuelto entre 3.8 y 12.5 mL/L. En Bahía Miraflores, la floración de B. quinquecornis fue asociado positivamente con el incremento de la TSM, salinidad y negativamente con la concentración de nitratos, mientras que las floraciones algales de A. sanguinea se correlacionó positivamente con la concentración de fosfatos y oxígeno disuelto. El registro de la floración de B. quinquecornis en las bahías de Miraflores y Paracas, coincidió con eventos de inusual calentamiento del mar asociado con el evento cálido El Niño 2015-2016.
Abstract In the present work, harmful algal blooms of the dinoflagellate Blixaea quinquecornis (Abé) Gottschling, 2017 are recorded for the first time for coastal waters of the Peruvian sea. The taxonomic determination of this species was done with light microscopy, Scanning Electron Microscopy (SEM), and Differential Interference Contrast (DIC) microscopy. The thecal formula is: pp, 3', 2a, 7'', 5c, 5"' and 2''' 4s. Blixaea quinquecornis was recorded in Sechura, Miraflores and Paracas bays between 2014 - 2016, mainly with algal blooms of 3.2 x105 cel.L-1 (Miraflores) and 2.11x105 cel.L-1 (Paracas) and 4.11 x104 cel.L-1 (Paracas) in autumn of 2016. Blixaea quinquecornis was found alternating with algal bloom produced by the athecate dinoflagellate Akashiwo sanguinea. The physicochemical variables associated with the bloom of B. quinquecornis were SST (18.5 to 26.6° C), salinities (34.7 to 35.325), pH (7.32 to 12.5), and dissolved oxygen (3.8 to 12.5 mL/L). The bloom of B. quinquecornis in Miraflores Bay was positively associated with the increase in SST, salinity and negatively with the concentration of nitrates, whereas the algal blooms of A. sanguinea were positively correlated with the concentration of phosphates and oxygen. The record of the bloom of B. quinquecornis in the 3 bays coincided with unusual sea warming event associated with the El Niño phenomenon 2015-2016.
ABSTRACT
AbstractSince 1983, San Pedro Bay in the Philippines had been reported to be the site of episodic Pyrodinium bahamense var. compressum blooms that caused paralytic shellfish poisoning in its nearby coastal communities. This bay is also subjected to numerous storms; the strongest was super typhoon Haiyan in November 8, 2013. For the first time, the seasonal dynamics of potentially toxic and harmful phytoplankton in this bay is elucidated. This is also the first record of a bloom of the cyanobacteria, Trichodesmium erythraeum that reached 70 000 colonies/L in April 2013 in this area. There were other 19 potentially toxic and harmful phytoplankton encountered during the sampling period. These consisted of a haptophyte, Phaeocystis globosa, the diatom Pseudonitzschia and 17 dinoflagellates. Seven of these harmful algae had densities high enough to be traced through time. Normally, diatoms abound during the dry season. But Pseudo-nitzschia increased in abundance during the wet season of 2012 and 2013. The dinoflagellates and Phaeocystis globosa behaved as expected and exhibited a relative increase in cell density during the rainy season of both years too. High nutrient availability during this season must have influenced the behavior of the phytoplankton despite differences in temperature and light intensity among seasons. Other notable but rare harmful species found only in plankton net tows during the study were Pyrodinium bahamense var. compressum, Alexandrium tamiyavanichii, Cochlodiniumpolykrikoides, and Noctiluca scintillans. Rev. Biol. Trop. 64 (2): 897-911. Epub 2016 June 01.
ResumenDesde 1983, la Bahía de San Pedro en Filipinas ha sido reportada como un sitio de proliferación de Pyrodinium bahamense var. compressum que causó intoxicación paralítica en sus comunidades costeras cercanas. Esta bahía también está sometida a numerosas tormentas; entre las más fuertes se presentó un súper tifón en Haiyan, el 8 de noviembre 2013. Por primera vez, se explica la dinámica estacional del fitoplancton potencialmente tóxico y dañino en esta bahía. Este es también el primer registro en esta área de una proliferación de cianobacterias (Trichodesmium erythraeum) que alcanzó 70 000 colonias/L en abril 2013. Durante el periodo de muestreo se presentaron otras 19 proliferaciones de fitoplancton potencialmente tóxicas y dañinas. Estos consistían en una haptófita, Phaeocystis globosa, la diatomea Pseudo-nitzschia y 17 dinoflagelados. Siete de estas algas nocivas tenían densidades suficientemente altas como para ser rastreadas a través del tiempo. Normalmente, las diatomeas abundan durante la estación seca. Pero Pseudo-nitzschia aumentó en abundancia durante la temporada de lluvias de 2012 y 2013. Los dinoflagelados y Phaeocystis globosa se comportaron como se esperaba y exhibieron un aumento relativo de la densidad celular durante la temporada de lluvias en los dos años. La alta disponibilidad de nutrientes durante esta temporada debe haber influido en el comportamiento del fitoplancton a pesar de las diferencias en la temperatura y la intensidad de la luz entre estaciones. Otras especies nocivas notables, pero raras que se encontraron sólo en las redes de arrastre de plancton durante el estudio fueron: Pyrodinium bahamense var. compressum, Alexandriumtamiyavanichii, Cochlodinium polykrikoides y Noctiluca scintillans.
Subject(s)
Phytoplankton/microbiology , Trichodesmium/growth & development , Philippines , Seasons , Environmental Monitoring , BaysABSTRACT
Objective To analyze the clinical effects of 131I-HAb18F(ab')2 radioimmunotherapy via hepatic artery on PLC with portal vein tumor emboli. Methods Under the condition of thyroid protection and negative dermal sensitivity test, 12 times of intraarterial injection with 131I labeled murine HCC monoclonal antibody fragment HAb18F(ab')2 were performed in 8 patients of PLC complicated with portal vein tumor emboli. A 0.75 mCi/kg dose of 131I was administrated individually into certain target vessel after hepatic artery angiography using Seldinger technique. Results 3 of 7 patients with symptoms of pains showed remission with simultaneous improvement and stabilization in Karnofsky score in 3 and 4 patients respectively. AFP levels decreased about 50%(3/6)in 3 cases among those 6 positives and the values of I.B. and ALT changed within a very narrow range to a certain extent after the treatment. The overall rate of CR + PR was 28.6% and similar better result was obtained in a non-symptomatic diffuse PLC patient.1 year survival rate was 12.5%. Conclusion 131I-HAb18F(ab')2 radioimmunotreating drug(0.75 mCi/kg)with hypotoxicity to liver-function can be used as an acceptable method for unresectable PLC with portal vein tumor emboli, especially for those without tumor emboli in the main trunk.
ABSTRACT
7721.Conclusion: This study demonstrates that the expression of ?ig-h3 mRNA in hepatoma cell lines is higher than that in normal liver cell QZG,which provides a sound basis for exploring the function of ?ig-h3 in processes of adhesion and metastasis of human hepatoma cells.
ABSTRACT
Objective To study the possible different effects on primary liver cancer of various types of blood supply demonstrated by DSA via hepatic artery radioimmunotherapy with 131Ⅰ-HAb18F(ab')2.Methods Under thyroid protection and negative dermal sensitivity test,46 times of intraarterial injection with a 0.75 mCi/kg dose of 131Ⅰ labeled murine HCC monoclonal antibody fragment [HAb18F(ab')2] were performed in 30 patients of PLC using the Seldinger technique.The shrinkage rates of tumor volume were analyzed according to hyper,moderate and hypo vascular three types provided by DSA.Results The volume shrinkage rates of hyper and moderate vascular HCC were 60% and 37.5% respectively,while that of 2 cases of hypovascular HCC showed significantly reduction.Conclusion 131Ⅰ-HAb18F(ab')2 internal radioimmunotherapy prossesses certain signification volume shrinkage efficacy on different blood supplies provided by DSA.(J Intervent Radiol,2007,16:243-245)