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Biomedical subjects

D M Klein

Publications and source records attributed to D M Klein.

41 records · Page 3Linked to original sources
PubMed1977

Enhancement of R3230AC rat mammary tumor growth and cellular differentiation by dibutyryl cyclic adenosine monophosphate.

Daily sc injections of 8 mg N6, O2'-dibutyryl 3',5'-cyclic AMP (DBcAMP) beginning 1 day after tumor implantation significantly increased the growth rate of R32230AC rat mammary adenocarcinomas, which nearly doubled in in situ volume by day 40 compared to similarly implanted tumors in saline-injected controls. Weights of excised tumors, intact, drained, and dried all increased approximately 80%, which suggested that the increase in tumor size was not due to accumulation of secreted fluid or tissue water. Injections of 17beta-estradiol valerate (0.1 mg/wk) from day 1 or of DBcAMP from day 22 resulted in insignificant changes in growth--28% and 35% increases in tumor volume and a 5% decrease and an 18% increase, respectively, in drained wet weight. Electron microscopic examination revealed that estrogen and DBcAMP caused differentiation of the tumor cells into two different states: Estrogen-treated tumors resembled lactating mammary glands; they contained large lipid droplets, organized rough endoplasmic reticulum, and vesicles containing electron dense granules resembling protein. DBcAMP-treated tumor cells were marked by a proliferation of the Golgi complex and numerous vesicles containing fine granular material.

Adenocarcinoma↗
PubMed1976

Simultaneous subdural effusion and hydrocephalus in infancy.

Hydrocephalus and subdural hematoma or effusion of infancy rarely present simultaneously, where both are active contributors to acutely increased intracranial pressure. In three cases, clinical findings characteristic of both were present. Decompression of one can facilitate expansion of the other. Rapid progression of unsuspected hydrocephalus could be responsible for some of the poor results reported after treatment of subdural effusion alone. This possibility should be considered whenever progress is unsatisfactory during treatment of subdural effusion.

Brain↗
PubMedDate not supplied

Advances in immunotherapy of sepsis.

Septic shock, with its associated high morbidity and mortality, has long been a challenge to the critical care nurse. A promising new development in the treatment of this condition is the use of monoclonal antibodies to inactivate two prime mediators that induce the cascade of events that culminate in septic shock and multiple organ failure: bacterial endotoxin and tumor necrosis factor (TNF). The effectiveness of this immunotherapy depends on its timely administration, which necessitates the early identification of sepsis.

Antibodies, Monoclonal↗
PubMedDate not supplied

Spontaneous healing of a massive tibial cortical defect.

This case report describes the spontaneous healing of a 20-cm massive tibial cortical defect. The defect was created during debridement of necrotic bone and soft tissue in a low-velocity gunshot wound of the tibia that became infected in a skeletally mature patient. The patient was treated in an external fixator and had a soleus flap to provide soft-tissue coverage. He had refused any surgical reconstructive options. Despite the absence of surgical reconstruction, his tibia healed, and he returned to full activity without any orthotic device 9 months after the original injury.

Adolescent↗