|
CHAPTER XIII
|
|
PHASE III STUDY OF INOPERABLE
LUNG CANCER
|
|
ANTITUMORAL EFFECT OF AMYGDALIN
IN PATIENTS WITH INOPERABLE LUNG
CANCER
PHASE III STUDY
|
|
Dr. Ernesto Contreras Rodriguez,
M.D.
Dr. Jose Ernesto Contreras
Pulido, M.D.
Dr. Abel Mellado Prince, M.D.
Medical Oncologists, Directors of
the Centro Medico y Hospital Del
Mar, Playas de Tijuana, B.C.N.,
Mexico |
Summary
A total of 257 patients with a diagnosis of
inoperable lung cancer in all its histologic
types, clinical stages and grades of
functional capacity (KP.S.Karnofsky
Performance Status) were treated
intravenously with AMYGDALIN for three weeks
and orally, with or without the intravenous
application for the remainder of the study
or until voluntary suspension. There were 15
complete remissions, 17 partials and 110
stabilizations for six or more months;
55.25% of the patients survived 12 or more
months from the date of diagnosis and 34.63%
from the initial dose of AMYGDALIN. It is
concluded that although this study is
considered to be a Phase II study, it proves
the antitumoral effect of AMYGDALIN and
justifies more Phase II and Ill studies. We
conclude that the use of AMYGDALIN is an
acceptable palliative for pa tients with
inoperable lung cancer. There was no
evidence of AMYGDALIN toxicity.
Introduction
Lung cancer is responsible for more than 20%
of the deaths caused by malignant neoplasms
in the USA and other highly Industrialized
countries. It is the most frequent cause of
death from cancer in males and the third in
women. After malignant neoplasms of the
skin, it is the most frequent and its
incidence has not ceased to increase in
parallel form to the per capita consumption
of tobacco. Its mortality rate is currently
25 times greater than that recorded 45 years
ago. Only 20% of those contracting lung
cancer will be candidates for surgical
treatment leading to a cure and only 10%
will survive five years. The me dian
survival will hardly pass 25 weeks and in
the anaplastic variety of small cells,
probably will not ex ceed seven weeks after
the diagnosis, if the disease is extensive.
We believe
that all of this justifies and makes
imperative the search for new substances
that will im prove the prognosis and/or the
quality of life of the patients with
inoperable lung cancer.
This Phase Ill
study is based upon the findings reported in
our previous Phase I and Phase II studies in
which AMYGDALIN showed anti-tumoral effect
upon patients with inoperable lung cancer.
Patients and Methods
Included in this study were all those
patients who entered the Centro Medico y
Hospital Del Mar with confirmed diagnosis of
inoperable lung cancer between Jan. 1,1975
and Dec. 31, 1977, and who had received a
minimum of six weeks treatment with
AMYGDALIN. There was no selection made
according to histologic type, extension of
the disease or functional capacity.
The patients
were evaluated before beginning their
treatment, at least with a document that
confirmed the histopathological diagnosis of
their illness, A-P and lateral chest X-rays,
complete blood counts, tests for renal and
hepatic functions, glycemia and
electrolytes. Their complete clinical
history was taken and according to each
case, the necessary, complementary studies
were requested. Each patient was followed
for a minimum of two years or until death.
All patients
started on AMYGDALIN the day they entered
the institution according to the schedule
outlined in Chart I. AMYGDALIN was continued
until the patient's voluntary suspension or
death oc curred.
Included as an
integral part of the treatment for all
patients was a diet rich in proteins,
moderate in carbohydrates and low in fats
and salt. They always received vitamin and
mineral supplements, proteolytic enzymes and
it was insisted that they avoid the use and
ingestion of toxic and/or carcinogenic
substances.
The patients
were grouped according to their
histopathological type, extension of the
disease and functional capacity, in
accordance with classifications which are
accepted on a world wide basis and which are
presented in Charts 2, 3 and 4.
An evaluation
was made of the objective responses (see
Chart 5), the survival to twelve months,
from diagnosis and from the initiation of
AMYGDALIN. The differences that existed in
each one of the histopathological types were
analyzed in accordance with the extension of
the disease and the functional capacity of
the patient upon the initial application of
AMYGDALIN. Finally, the results were
compared with historic controls. It should
be mentioned that concerning the patients
who were "lost," the date of the last
contact was considered to be the date of
death.
Results
A total of 257 patients with inoperable lung
cancer, adequately documented, were included
in the study. 183 patients were men and 74
were women. The average age was 56, the
youngest was 24, and the oldest was 85.
Persistence or recurrence of the disease
because of failure of previous treatments
was verified in 192 patients and 65 patients
received radiotherapy to the primary lung
tumor simultaneously with AMYGDALIN. At
least once, conventional chemotherapy was
administered to 21 patients simultaneously
with AMYGDALIN. The findings in these last
patients will be included in another study.
The
distribution of the patients according to
histological type, extension of the illness
and functional capacity are reported in
Chart 6.
Objective Responses
Fifteen patients (5.83%) showed complete
remission: nine of the squamous cell type,
two anaplastic of small cells, two
adenocarcinomas and two with carcinoma of
large cells. It should be mentioned that
three of these patients with squamous cell
carcinoma, one anaplastic of small cells and
one with car cinoma of large cells had
received other conventional treatments prior
to AMYGDALIN, which was felt to contribute
definitively to the response obtained. The
other nine had failed treatment or had not
previously received conventional treatment.
Seventeen
patients (6.61 %) showed partial remission:
four of the squamous cell type, four
anaplastic small cell, five adenocarcinoma,
one carcinoma of large cells and three
unclassified.
A total of 110
patients (42.8%) showed stabilization of
their illness for a minimum of six months
from the administering of AMYGDALIN: 44
squamous cell type, 23 anaplastic small cell
type, 35 adenocar cinomas, three carcinomas
of large cells and five were not classified.
The total of complete and partial remissions
was 32 patients (12.45%) and 142 of the 257
patients (55.25%) demonstrated, at least,
stabilization of their disease.
Average Survival
The average survival, from diagnosis, for
the 257 patients was 59.45 weeks: 62.93
weeks for those with squamous cell type;
45.5 weeks for the anaplastic type of small
cells; 56.42 weeks for adeno carcinomas;
80.29 weeks for large cell carcinoma and
52.08 weeks for those not classified.
The median
survival counting from the initiation of
AMYGDALIN for the 257 patients was 35.75
weeks: 34.72 weeks for those with squamous
cell type; 26.04 weeks for the anaplastic,
small cell type; 32.55 weeks for those with
adenocarcinoma, 50.73 weeks for the large
cell carcinomas and 26 weeks for the
unclassified ones.
Survival According to the Extension of the
Disease
Fifty-nine of the 106 patients (55.66%) with
limited suffering at the onset of AMYGDALIN
survived twelve months or more counting from
the diagnosis. Eighty-three of the 151
patients (54.96%) with exten sive suffering
at the onset of AMYGDALIN survived twelve
months or more from diagnosis. Of the 142
sur viving patients at twelve or more months
from the diagnosis, 59 (41 .5%) had limited
suffering and 83 (58.5%) extensive disease
upon initiating AMYGDALIN. Forty-one of the
106 patients (38.67%) with limited disease
survived twelve or more months from the
initial dose of AMYGDALIN. Forty-eight of
the 151 patients (31 .78%) with extensive
suffering, survived twelve months or more
from the initial dose of AMYGDALIN. Of the
89 patients who survived twelve months or
more from the initial application of
AMYGDALIN 41 (46.06%) had limited disease
and 48 (53.93%) extensive disease upon
initiating AMYGDALIN.
Survival According to
Functional Capacity
Ninety-three of the 147 ambulatory patients
(63.26%) (K.P.S. 0, 1 and 2) upon initiating
AMYGDALIN, survived twelve months or more
from the time of diagnosis. Forty-nine of
the 110 patients (44.54%) con fined to chair
or bed more than 50% of the hours under care
(K.P.S. 3 and 4) upon initiating AMYGDALIN,
survived twelve months or more from
diagnosis. Of the 142 patients who survived
twelve or more months from diagnosis, 93
(65.49%) had a K.P.S. of 0, 1 or 2 and 49
(34.5%) had a K·P.S. of 3 or 4 upon initial
use of AMYGDALIN.
Sixty-five of
the 147 ambulatory patients (44.21%)
survived twelve months or more from the
initial use of AMYGDALIN. Twenty-four of the
110 patients (21.81 %) with K.P.S. of 3 or
4, survived twelve months or more with the
usage of AMYGDALIN. Of the 89 patients who
survived twelve or more months from the
initial use of AMYGDALIN, 65 (73.03 %) were
ambulatory and 24 (26.96%) had a K.P.S. of 3
and 4 upon its initiation.
Survival According to Objective Response
Survival of twelve months, from the time of
diagnosis for those patients with complete
remission was 86.66% (13 of 15 patients),
for those with partial remission was 70.58%
(12 of 17 patients), for those showing
stabilization 60% (66 of 110 patients) and
for those that showed progress 45.21% (52 of
115 patient 5).
Survival to 24
months from the diagnosis for those patients
with complete remission was 73.33% (11 of 15
patients), for those with partial remission
was 23.52% (4 of 17 patients), for those
exhibiting stabilization was 28.18% (31 of
110 patients) and for those who showed
progress 9.13% (22 of 115 patients).
The survival
of twelve months, from the commencement of
AMYGDALIN for the patients with com plete
remission was 80% (12 of 15 patients), for
those patients with partial remission was
52.94% (9 of 17 patients), for those who
exhibited stabilization was 52.72% (58 of
110 patients) and for those that showed
progress 19.13% (22 of 115 patients).
Survival to 24
months starting with the initiation of
AMYGDALIN for those patients with complete
remission was 73.33% (11 of 15 patients, for
those with partial remission was 23.52% (4
of 17 patients), for those patients
exhibiting stabilization was 19.09% (21 of
110 patients), and for those showing pro
gress 5.21% (6 of 115 patients).
The survival
of the 257 patients in function of the
histological type, extension of the disease,
functional capacity and objective response,
is summarized in Chart 7.
The
comparative analysis of the survival of
these 257 patients with historic control is
included in Chart 8.
Toxicity
There was no evidence of chronic or acute
toxicity attributable to the use of
AMYGDALIN in any of the patients exposed to
the dosages employed in this study. No
patient suspended AMYGDALIN because of
undesirable effects.
Other Findings
A total of 191 patients (74.31%) were
smokers and 113 (43.96%) had immediate
relatives with diagnosed cancer. The
frequency of lung cancer was greater in
males (2.47:1) and also predominant in the
fifth and sixth decades of life. The
distribution of metastases was similar to
that reported in other studies of metastasis
from lung to lung, bone, brain and liver.
Subjective Response
There was clear improvement in the quality
of life and capacity, above all in the
patients with K.P.S. 3 and 4. Tolerance to
radiotherapy was increased significantly in
the patients
Discussion
So far as we know, this is the first
strictly prospective and non-selective study
performed on patients with malignant
neoplasms, using AMYGDALIN as the only
systemic antitumoral agent. This should be
considered a Phase II study because of the
use of historic controls for comparative
analysis. Even so, the following valid
conclusions can be drawn:
1. AMYGDALIN is capable of producing
objective responses in patients with
inoperable lung cancer who are not
candidates for conventional therapy.
2. In these patients AMYGDALIN
offers an average survival greater
than that reported with the ma
jority of the treatments currently
In use.
3. AMYGDALIN offers a survival of
twelve months, greater than that
reported by the majority of the
treatments currently in vogue, and
at least equal to that of the best
conventional treatments from the
initial dose of AMYGDALIN.
4. AMYGDALIN is non-toxic when used
in therapeutic dosages, under
medical supervision and does not
interfere with the use of other
palliative treatments such as
radiotherapy and chemotherapy 5.
AMYGDALIN subjectively improves the
patients even in extensive stages of
disease, clearly di minished
functional capacity and unfavorable
histology.
Since
it is certain that the best results were
found in patients with carcinoma of the
large cells, it is not yet possible to
draw definitive conclusions due to the
small number of patients with this
histologic type of lung cancer in the
study. On the other hand, it is very
interesting to make note that in 54
patients with anaplastic carcinoma of
the small cells, two complete remissions
were reported, four partial remisions
and three stabilizations with a duration
of six months or more; survival to
twelve months for 46.29%, from the date
of diagnosis and 25.9% from the initial
use of AMYGDALIN, and a median survival
of 45.5 weeks, from the date of
diagnosis and 26 weeks from the initial
use of AMYGDALIN.
All these
results are better than those reported in
other studies, even with programs of
polychemo therapy with illness above 30% and
mortality between 34%
We believe,
then, that even accepting that this study
has faults and deficiencies, it Is
sufficient to justify the continuation of
Phase Ill studies with stricter criteria
than in medical institutions of renowned
prestige and experience and that we continue
to follow the patients in this study to the
end of reporting long-term survivals in
subsequent papers.
A Phase Ill
study is currently being carefully prepared
with a minimum of 100 patients with
anaplastic carcinoma of small cells, treated
with AMYGDALIN, with or without radiotherapy
at the primary tumor site, and other Phase
II studies about patients with large cell
carcinoma.
We conclude
that AMYGDALIN is a successful, anti-tumoral
agent for the paliative treatment of pa
tients with inoperable lung cancer, in
therapeutic dosages which are practically
atoxic when prescribed under strict medical
supervision and the possibility should be
considered of using it:
|
1. |
As
a therapeutic alternative for
patients with inoperable lung
cancer and who cannot receive
conventional treatment
|
|
2
|
As
a simultaneous treatment in the
multidisciplinary treatment of
those patients.
|
|
3.
|
As
a helpful treatment in patients
in remission.
|
|
4.
|
As a
successful palliative treatment for
patients in stages that were not
treatable with the con ventional
methods currently In use.
|
|
Chart 1.
Schedule
for AMYGDALIN Dosage
|
|
Initial Phase:
|
AMYGDALIN 3 g, I.V., per day,
six days per week for 3 or 4
weeks.
|
|
Subsequent Phase:
|
AMYGDALIN 1.5g. orally, per day,
six days per week, indefinitely.
|
|
NOTE: In the patients with
severe persistence In the
symptomology or recurrence of
the same, it was recommended
that they continue with
AMYGDALIN 3 g. I.V. per day, one
to three days per week until
palliation was achieved or the
treatment was considered to have
failed. The rest ot the days,
except Sundays, they received
AMYGDALtN 1.5 g., orally, per
day.
|
|
Chart 2.
Classification of Lung
Cancer by Histologic Types
Recommended by the World
Health Organization (WHO),
Veteran's Administration
Lung Cancer Chemotherapy
Study Group of the U.S.A.
(VALCCSG) and the Labor
Group for the Treatment of
Lung Cancer (WP-L)
|
|
WHO |
VALCCSG |
WP-L |
|
I
|
Epidermoid Carcinoma
|
1
|
Squamous Cell Carcinoma
|
10
|
Epidermoid Carcinoma
|
|
II
|
Anaplastic Small Cell Carcinoma
|
2
|
Undifferentiated Small Cell
Carcinoma |
20
|
Anaplastic Small Cell Carcinoma
|
|
Ill
|
Adenocarcinoma |
3
|
Adenocarcinoma |
30
|
Adenocarcinoma |
|
IV
|
Large Cell Carcinoma
|
4
|
Undifferentiated Large Cell
Carcinoma |
40
|
Large Cell Carcinoma
|
|
V
|
Unclassified |
-
|
-
|
-
|
-
|
|
Chart 3
Classification According to
Extension
|
|
Limited Disease: |
Tumor activity limited to one
hemithorax, with or without
ipsilateral, prescalenic, lymph
node metastasis. |
|
Extensive Disease: |
Includes all other patients with
inoperable lung cancer and intra
or extra-thoracic, tumoral
activity. |
|
Chart 4.
Classification In Accordance
with Functional Capacity
(ECOG)
|
|
0
|
Patient completely active.
Capable of performing all of his
normal ac tivities, without
restrictions, before becoming
ill. (K.P.S. 90-100) |
|
1
|
Restricted in tiring, physical
activities, but ambulatory and
capable of doing light or
sedentary work. (K.P.S. 70-80) |
|
2
|
Ambulatory and self sufficient,
but incapable of doing any work.
Ambu latory during more than 50%
waking hours. (K.P.S. 50-60) |
|
3
|
Partially self sufficient,
confined to wheel chair or bed
more than 50% of waking hours.
(K.P.S. 30-40) |
|
4
|
Incapacitated and confined
completely to bed or chair.
(K.P.S. 10.20) |
|
Chart 5.
Criteria for Objective Tumor
Response
|
|
Complete Remission |
Disappearance of all measurable
tumors and all apparent disease.
|
|
Partial Remission |
Reduction of 50% or more of the
lesions or measurable, tumoral
volume and marked reduction of
that not measurable (75% or
more), In absence of new
lesions. |
Stabilization:
|
Reduction of less than 50% of
the tumoral volume or absence of
noticeable changes in the
visible lesions, without
appearance of new lesions |
|
Progression: |
Appearance of new lesions,
increase in 50% or more of
apparent lesions. Some authors
dis count cerebral metastasis
because of the tra ditional
failure of response to
chemotherapy. |
|
Chart 6.
Distribution of Patients
According to
Histopathological Type,
Extent of Disease,
Functional Capacity,
Therapeutic Antecedents and
Sex
|
|
TYPE |
LIMITED |
EXTENT |
K.P.S.2 |
K.P.S.3-4 |
TREAT. |
VIRGINS |
MALE |
FEMALE |
|
SC |
52
|
55
|
48
|
59
|
82
|
25
|
85
|
22
|
|
ACSC |
23
|
31
|
34
|
20
|
41
|
13
|
37
|
17
|
|
AC |
18
|
50
|
50
|
18
|
50
|
18
|
38
|
30
|
|
CLC |
4
|
7
|
6
|
5
|
8
|
3
|
8
|
3
|
|
NC |
9
|
8
|
10
|
7
|
11
|
6
|
15
|
2
|
|
TOTAL |
106
|
151
|
147
|
110
|
192
|
65
|
183
|
74
|
|
SC: |
Skin Cancer (Epidermoid
Carcinoma) |
|
ACSC: |
Small cell anplastic carcinoma |
|
AC:
|
Adenocarcinoma
|
|
CLC:
|
Large cells carcinoma
|
|
NC:
|
Unclassified
|
|
K.P.S
|
Karnofsky Performance Status
(see Chart 4)
|
|
TREATED
|
Patients with previous
cancer treatment
|
|
VIRGINS
|
Patients who received
AMYGDALIN as first
treatment.
|
|
|
SURVIVAL COUNTING FORM
|
|
|
DIAGNOSIS
|
INITIAL USE OF AMYGDALIN
|
|
TYPE
|
|
12 MONTHS PERCENTAGE
|
MEDIAN WEEKS
|
12 MONTHS PERCENTAGE
|
MEDIAN WEEKS
|
|
EC
|
Limited
|
61.53
|
65.1
|
44.25
|
45.57
|
|
|
Extensive
|
54.54
|
60.76
|
32.72
|
30.38
|
|
|
Ambulatory
|
65.00
|
71.61
|
48.33
|
49.91
|
|
|
Non-ambulatory
|
48.93
|
49.91
|
23.4
|
15.19
|
|
|
Complete remission
|
77.77
|
199.64
|
77.77
|
160.58
|
|
|
Partial Remission
|
59.00
|
53.59
|
25.60
|
42.31
|
|
|
Stabilization
|
61.36
|
67.27
|
47.72
|
4+6.65
|
|
|
Progressive
|
48.00
|
52.08
|
22.00
|
28.21
|
|
SCAC
|
Limited
|
47.82
|
47.74
|
30.43
|
43.4
|
|
|
Extensive
|
45.16
|
45.57
|
77.52
|
32.55
|
|
|
Ambulatory
|
47.05
|
49.91
|
76.47
|
39.06
|
|
|
Non-ambulatory
|
45.00
|
40.14
|
25.00
|
19.53
|
|
|
Complete remission
|
100.
|
109.58
|
50.00
|
91.14
|
|
|
Partial Remission
|
100.
|
105.24
|
100.00
|
92.22
|
|
|
Stabilization
|
47.82
|
49.91
|
16.08
|
39.06
|
|
|
Progressive
|
28.00
|
32.55
|
12.00
|
20.39
|
|
AC
|
Limited
|
50.00
|
48.82
|
38.88
|
37.97
|
|
|
Extensive
|
58.00
|
58.59
|
32.00
|
31.46
|
|
|
Ambulatory
|
56.00
|
73.78
|
42.00
|
32.55
|
|
|
Non-ambulatory
|
50.00
|
50.99
|
16.66
|
24.95
|
|
|
Complete remission
|
100.00
|
109.58
|
100.00
|
151.90
|
|
|
Partial Remission
|
40.
|
105.24
|
20.00
|
30.38
|
|
|
Stabilization
|
27.14
|
58.42
|
42.85
|
39.06
|
|
|
Progressive
|
53.58
|
73.78
|
15.38
|
23.87
|
|
LCC
|
Limited
|
50.00
|
53.1
|
50.00
|
44.43
|
|
|
Extensive
|
71.47
|
104.16
|
42.85
|
39.06
|
|
|
Ambulatory
|
60.00
|
82.46
|
60.00
|
80.29
|
|
|
Non-ambulatory
|
66.66
|
91.14
|
33.33
|
34.89
|
|
|
Complete remission
|
100.00
|
195.30
|
100.00
|
133.45
|
|
|
Partial Remission
|
100.00
|
78.12
|
100.00
|
73.78
|
|
|
Stabilization
|
100.00
|
112.84
|
33.33
|
39.06
|
|
|
Progressive
|
20.00
|
23.87
|
20.00
|
10.85
|
|
UC
|
Limited
|
55.55
|
52.08
|
33.33
|
34.72
|
|
|
Extensive
|
62.5
|
58.59
|
40.00
|
36.65
|
|
|
Ambulatory
|
60.00
|
54.25
|
40.00
|
37.97
|
|
|
Non-ambulatory
|
57.14
|
62.93
|
42.85
|
43.40
|
|
|
Complete remission
|
--
|
--
|
--
|
--
|
|
|
Partial Remission
|
66.66
|
149.73
|
66.66
|
138.88
|
|
|
Stabilization
|
60.00
|
54.52
|
20.00
|
52.08
|
|
|
Progressive
|
44.44
|
49.91
|
22.22
|
26.04
|
|
Chart 8.
A
Comparative Study
Between the Survival of
Patients Treated with
AMYGDALIN (KEMDALIN) and
the Survival Reported in
Journals
|
|
HISTOLOGICAL TYPE
|
MEDIAN
SURVIVAL, WEEKS
|
12 MONTH SURVIVAL
|
24 MONTH
SURVIVAL
|
TREATMENT
|
|
All
|
20.2
|
--
|
--
|
Radiotherapy
|
|
All
|
16.
|
--
|
--
|
None
|
|
All
|
28.2
|
--
|
--
|
Radiotherapy
|
|
All
|
26.2
|
--
|
--
|
None
|
|
All K.P.S. 0 & 1
|
31.4
|
23.0 %
|
--
|
None
|
|
All K.P.S. 0 & 1
|
15.
|
--
|
--
|
None
|
|
All
|
59.45
|
55.25%
|
2645%
|
Kemdalin from Diagnosis
|
|
All
|
35.76
|
34.63%
|
16.34%
|
Kemdalin from Diagnosis
|
|
Skin Cancer
|
9.5
|
--
|
23.4 %
|
Radiotherapy
|
|
Skin Cancer
|
--
|
--
|
13.4 %
|
None
|
|
Skin Cancer
|
--
|
--
|
24.8 %
|
Radiotherapy
|
|
Skin Cancer
|
62.93
|
| |