Abstract:
:The blood-brain barrier is a major obstacle for the chemotherapeutic drugs to effectively reach primary or secondary brain tumours. Stealth liposomal drugs are highly accumulated in tumoural tissues. In the present study we investigated the relative accumulation of(99m)Tc-DTPA radiolabelled stealth liposomal doxorubicin (Caelyx) in 10 patients with metastatic brain tumours and five patients with brain glioblastoma undergoing radiotherapy. Patients with metastatic brain lesions were treated with 10 consecutive fractions of radiotherapy (whole brain, 3 Gy/fraction, day 1-12) followed by a booster dose of 9 Gy (3 Gy/fraction, day 21-23). Caelyx, at a dose of 25 mg mg(-2)was given on day 1 and on day 21. Radiolabelled Caelyx accumulation was 13-19 times higher in the glioblastomas and 7-13 times higher in the metastatic lesions, as compared to the normal brain. The drug accumulation in the tumoural areas was 40-60% of the accumulation in the bone marrow of the skull bones. The normal brain radioactivity was <4% of the bone marrow, confirming an important shielding effect of the blood-brain barrier in the normal but not in the tumoural tissue. Four of 10 patients with metastatic lesions showed a complete response in CT-scan performed 2 months following therapy. There was no severe toxicity related to radiotherapy or to chemotherapy noted. It is concluded that stealth liposomal drugs selectively overcome the blood-brain barrier in the tumoural areas. The clinical importance of this observation is now under investigation.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Koukourakis MI,Koukouraki S,Fezoulidis I,Kelekis N,Kyrias G,Archimandritis S,Karkavitsas Ndoi
10.1054/bjoc.2000.1459subject
Has Abstractpub_date
2000-11-01 00:00:00pages
1281-6issue
10eissn
0007-0920issn
1532-1827pii
S0007092000914599journal_volume
83pub_type
杂志文章abstract::Between 1980 and 1985, 914 patients with head and neck squamous cell carcinoma underwent lymph node dissection in our institution. The prognostic value of clinical factors has already been reported (Mamelle et al, 1994, Am J Surg 168: 494-498). We present here a comparison of biological characteristics of pharyngeal t...
journal_title:British journal of cancer
pub_type: 杂志文章
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journal_title:British journal of cancer
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abstract::The vaso-active drug hydralazine causes a considerable increase in the cytotoxic effect of melphalan towards the KHT tumour in mice. The enhancement in response, measured as the concentration of melphalan required to achieve a given tumour response, is 3.0 and 2.35 when determined using the regrowth delay assay and th...
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journal_title:British journal of cancer
pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章
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pub_type: 杂志文章
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