Biomedical subjects

F Scotto

Publications and source records attributed to F Scotto.

7 recordsLinked to original sources

PubMed1993

Autologous lymphocytes prevent the death of monocytes in culture and promote, as do GM-CSF, IL-3 and M-CSF, their differentiation into macrophages.

Blood monocytes collected by apheresis from healthy donors were differentiated in vitro to macrophages which were subsequently activated with recombinant human interferon-gamma. 7 day cultures were established by seeding Ficoll-separated mononuclear cells or elutriation-purified monocytes under different culture conditions. The best macrophage yields required the seeding of mononuclear cells (instead of purified monocytes) in teflon bags with a high air-liquid surface interface. The effects of GM-CSF, IL-3 and M-CSF on the macrophage yield were then evaluated. GM-CSF increased the average yield by 3.6- and 2.3-fold when purified monocytes or total mononuclear cells were seeded respectively. The corresponding increases with IL-3 were 2.5- and 2.1-fold respectively and with M-CSF 1.2- and 1.4-fold respectively. Macrophages matured under these various conditions displayed similar CD14, CD64, CD71, HLA-DR and Max 1 antigen expression and similar in vitro anti-tumoral activity against U937 cells. Culturing in the presence of cytokines permits the large scale production of activated macrophages for adoptive immunotherapy trials.

CD3 Complex↗

PubMed1993

[Endoscopic aspects of primary non-Hodgkin's lymphoma of the stomach].

The introduction of endoscopy has led to a striking improvement in the diagnosis of primary non-Hodgkin gastric lymphomas due to the possibility of viewing the lesions directly and performing histological and cytological biopsies. Endoscopic findings are however polymorphous and may present difficulties of interpretation. The aim of this study was to re-examine the endoscopic data in 40 cases (25 M and 15 F) of gastric lymphoma observed during the period 1983-1990. There were three main endoscopic findings: ulcerated lesions (55%), infiltrating lesions (40%) and polypoid lesions (5%). In 75% of cases the biopsies carried out during the course of endoscopic examination were positive for lymphoma; in 7.5% of cases histological diagnosis was made using macrobiopsies carried out using a diathermic loop whereas in 17.5% it was made during the course of laparotomy. It may be possible to make further progress towards an early diagnosis following the introduction of echoendoscopy which will allow an in-depth evaluation of lesions and the involvement of lymph node stations and nearby organs.

Adult↗

PubMed1984

[Protocol of combined surgical and polychemico-immunoradiologic therapy of stage T2N2MO lung cancer].

Preliminary data on the use of a combined surgical-polychemical-immunoradiotherapy protocol in the treatment of 13 T2N2M0 lung cancer patients are reported. The results are compared with those obtained in a 13 patient control group, homogenous by histotype, stage and surgical treatment who were given no other therapy. At 24 months the average survival rate in the first group was 61.5% compared to 15.3% in the second. It was significant that survival at 24 months after pneumonectomy rose from 16.6% to 50% and even more significantly survival after lobectomy rose from 14.2% to 71.4%.

Antineoplastic Combined Chemotherapy Protocols↗

PubMedDate not supplied

Apheresis experience with a continuous flow cell separator.

The Dideco Vivacell separator is a continuous-flow centrifugation system that has only recently been used for cytapheresis. The authors' experience with this separator in 451 plateletpheresis and 164 leukapheresis procedures is presented. Platelet collection provided high platelet yields (9.53 +/- 2.85 X 10(11) with a collection efficiency of 74 +/- 14 percent for about 6 liters of total blood processed. Functional integrity was confirmed by normal in vitro tests (aggregation and response to hypotonic stress) and good in vivo recovery (55%). In leukapheresis, white cell yields were high (3.42 +/- 1.2 X 10(10) with 85 percent polymorphonuclear neutrophil cells. Their oxidative metabolism functions (generation of free oxygen radicals), investigated by chemiluminescence, were increased over donor values. Donor reactions, all of the mild citrate type, were rare.

Blood Component Removal↗

PubMedDate not supplied

Peripheral blood stem cell collection with a blood cell separator.

Forty-three patients with malignant nonmyeloid diseases underwent peripheral blood stem cell collections on an apheresis system (Spectra, COBE BCT, Lakewood, CO). Collections took place during the white cell (WBC) recovery phase following conditioning chemotherapy. One hundred two procedures were done after chemotherapy alone, and 72 procedures after chemotherapy plus granulocyte-colony-stimulating factor (G-CSF). Four centrifugal separation factors were tested. One and one-half patient blood volumes were processed in each procedure. The mean volume of the collected component was 158 +/- 16 mL. After chemotherapy alone, the procedures provided a mean of 0.8 x 10(8) WBCs per kg and 2.3 x 10(4) colony-forming units-granulocyte macrophage (CFU-GM) per kg of recipient body weight. The mononuclear cell percentage in the components increased with the centrifugal separation factor from 85 to 96 percent. In parallel, platelet contamination increased from 2.1 to 3.8 x 10(11). The collect hematocrit ranged from 1.0 to 2.5 percent (0.01-0.025). The collection efficiency for mononuclear cells and CFU-GM also increased with the centrifugal separation factors from 52 to 70 percent for mononuclear cells and from 55 to 68 percent for CFU-GM. Collections performed after G-CSF-stimulated mobilization were characterized by a higher neutrophil contamination independent of centrifugal separation factor, which gave a mean mononuclear cell percentage of 64 percent in the collected component. The average yield for these procedures was 2 x 10(8) WBCs per kg and 28 x 10(4) CFU-GM per kg.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

PubMedDate not supplied

[Emergency endoscopy in upper gastrointestinal hemorrhage].

The paper reports a series of 236 patients who underwent emergency esophagogastroduodenoscopy (EGDS) (within 48 hours of hospitalisation) due to hemorrhage of the upper digestive tract. A definitive diagnosis of the of bleeding was made in 233 (98.7%) cases. In 1.3% of cases, endoscopic tests proved negative. The most frequent cause of bleeding was duodenal ulcer, followed by esophageal varices. Hemorrhage was caused in only 46.2% of 80 cirrhotic patients by the rupture of esophageal varices, whereas in the remaining 53.8% of cases the source of hemorrhage was a lesion associated to esophageal varices. Surgery was necessary in 15 patients (6.4%). The death rate within 30 days was 5.5%. In conclusion, emergency EGDS performed within 24 hours of hospitalisation is the most precise diagnostic technique for upper gastrointestinal bleeding.

Adolescent↗

PubMedDate not supplied

Infusion of large quantities of autologous blood monocyte-derived macrophages in two cancer patients did not induce increased concentration of IL-6, TNF-alpha, soluble CD14 and nitrate in blood plasma.

In an attempt to increase the number of macrophages available for reinfusion in immunotherapy trials, GM-CSF was injected in vivo to mobilize circulating blood monocytes in 2 cancer patients. Subsequently mononuclear cells were collected by apheresis, cultured in the presence of GM-CSF and activated with IFN-gamma. This procedure resulted in the harvesting of 1.3 to 3.1 x 10(9) (mean 2 x 10(9)) macrophages per apheresis, product which was very well tolerated at autologous reinfusion. These infusions did not induce increased levels of TNF-alpha, IL-6, soluble CD14 nor nitrates in blood plasma (or urine). The lack of TNF-alpha and IL-6 release in blood plasma could explain the good tolerance of these infusions. No in vivo anti-tumoural activity of these high numbers of infused macrophages could be observed.

Antigens, CD↗