Adults 18 to 65, male only, with Hypogonadotropic Hypogonadism. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Percentage of Patients With Normalised Testosterone After 24 Weeks of Study TreatmentPrimary· 24 weeks of treatment
Percentage of patients with normalised testosterone i.e. testosterone in the range 300-1000ng/dL after 24 weeks of study treatment. The primary objective was considered met, if greater than or equal to 75% of the participants in any arm normalised.
Group
Value
95% CI
BGS649 0.1 mg
59
BGS649 0.3 mg
62
BGS649 1.0 mg
63
Placebo
7
The Proportion of Subjects That Have Normalization of Total Testosterone Serum Concentrations From Baseline to Week 24Secondary· Baseline, Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
Normalised total testosterone level was defined as between 300-1000 ng/dL (10.4-35 nmol/L) inclusive. Levels \>1000 ng/dL were considered super-physiological outside the normal range.
Baseline
Group
Value
95% CI
BGS649 0.1 mg
7
BGS649 0.3 mg
12
BGS649 1.0 mg
11
Placebo
7
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
54
BGS649 0.3 mg
53
BGS649 1.0 mg
57
Placebo
7
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
63
BGS649 0.3 mg
62
BGS649 1.0 mg
64
Placebo
10
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
63
BGS649 0.3 mg
61
BGS649 1.0 mg
65
Placebo
11
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
58
BGS649 0.3 mg
62
BGS649 1.0 mg
64
Placebo
7
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
57
BGS649 0.3 mg
63
BGS649 1.0 mg
63
Placebo
8
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
57
BGS649 0.3 mg
63
BGS649 1.0 mg
66
Placebo
9
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
59
BGS649 0.3 mg
62
BGS649 1.0 mg
63
Placebo
7
Proportion of Subjects That Overshoot Testosterone (Total Testosterone Above 1000 ng/dL [35 Nmol/L]) From Baseline to Week 24Secondary· Baseline, Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
Testosterone overshoot was defined as total testosterone above 1000 ng/dL (35 nmol/L). Samples were collected in the morning before 11 am pre dose.
Baseline
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
0
Placebo
0
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
0
Placebo
0
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
0
Placebo
0
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
1
Placebo
0
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
2
Placebo
2
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
2
Placebo
1
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
0
Placebo
1
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
0
BGS649 0.3 mg
0
BGS649 1.0 mg
1
Placebo
0
Normalization of Total Testosterone Serum Concentrations in ≥ 90% Subjects After 24 Weeks of Treatment.Secondary· 24 weeks of treatment
Normalized total testosterone level was defined as between 300-1000 ng/dL (10.4-35 nmol/L) inclusive. Levels \>1000 ng/dL were considered super-physiological outside the normal range. This secondary outcome measure was considered to have been met for a dose if ≥ 90% of subjects in the intent-to-treat (ITT) population had normalisation of total testosterone levels at Week 24.
Group
Value
95% CI
BGS649 0.1 mg
59
BGS649 0.3 mg
62
BGS649 1.0 mg
63
Placebo
7
Mean (SD) Change From Baseline in Luteinizing Hormone (LH) to Week 24.Secondary· Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
LH was measured at screening, baseline. The Baseline was defined as the last non-missing value collected before the first study treatment administration, including unscheduled assessments.
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
1.680
± 1.7503
BGS649 0.3 mg
2.095
± 1.3719
BGS649 1.0 mg
3.309
± 1.8200
Placebo
-0.183
± 1.3531
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
2.237
± 2.1982
BGS649 0.3 mg
3.626
± 2.6519
BGS649 1.0 mg
5.235
± 4.8684
Placebo
-0.385
± 1.2423
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
2.272
± 2.1908
BGS649 0.3 mg
3.653
± 3.0907
BGS649 1.0 mg
5.676
± 4.1471
Placebo
-0.169
± 1.5237
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
2.503
± 2.2230
BGS649 0.3 mg
3.511
± 3.7050
BGS649 1.0 mg
5.064
± 3.9739
Placebo
-0.341
± 1.4575
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
2.557
± 1.6964
BGS649 0.3 mg
3.704
± 3.6269
BGS649 1.0 mg
5.004
± 4.3397
Placebo
-0.395
± 1.4793
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
2.553
± 2.2380
BGS649 0.3 mg
3.653
± 3.7381
BGS649 1.0 mg
4.884
± 3.9297
Placebo
-0.193
± 1.3585
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
2.108
± 1.9892
BGS649 0.3 mg
3.560
± 3.6138
BGS649 1.0 mg
5.209
± 4.4894
Placebo
-0.043
± 1.5575
Mean (SD) Change From Baseline in Follicle Stimulating Hormone (FSH) to Week 24.Secondary· Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
FSH was measured at baseline, Visit 1 through 8 and follow-up. Baseline was defined as the last non-missing value collected before the first study treatment administration, including unscheduled assessments.
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
3.553
± 2.2022
BGS649 0.3 mg
4.575
± 2.0756
BGS649 1.0 mg
5.307
± 2.8315
Placebo
-0.51
± 0.8273
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
4.158
± 2.1353
BGS649 0.3 mg
5.540
± 2.8344
BGS649 1.0 mg
6.551
± 4.2155
Placebo
-0.111
± 1.0638
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
4.318
± 2.4147
BGS649 0.3 mg
5.878
± 2.9916
BGS649 1.0 mg
7.620
± 4.7883
Placebo
0.047
± 1.2241
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
4.809
± 2.5582
BGS649 0.3 mg
5.768
± 3.2474
BGS649 1.0 mg
8.132
± 5.9526
Placebo
-0.075
± 1.0723
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
5.188
± 2.6876
BGS649 0.3 mg
6.350
± 3.4261
BGS649 1.0 mg
8.045
± 6.1773
Placebo
-0.165
± 1.1924
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
5.059
± 2.5714
BGS649 0.3 mg
6.073
± 3.5199
BGS649 1.0 mg
8.409
± 6.6502
Placebo
-0.030
± 1.0932
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
4.836
± 2.6901
BGS649 0.3 mg
6.183
± 3.4817
BGS649 1.0 mg
8.282
± 7.0523
Placebo
0.038
± 1.2164
Descriptive Summary (Geometric Mean [95% CI]) of BGS649 Plasma PK Concentration Values to 24 Weeks.Secondary· Week 12 (pre-dose and 1 hour post-dose), week 24 and week 24/End of treatment
Plasma PK sampling for BGS649 was performed at Weeks 12 and 24. BGS649 PK plasma concentrations were summarised for the PK population by descriptive statistics.
Visit 5 (Week 12), Pre-Dose
Group
Value
95% CI
BGS649 0.1 mg
0.73
0.64 – 0.83
BGS649 0.3 mg
2.55
2.33 – 2.80
BGS649 1.0 mg
8.93
8.29 – 9.62
Visit 5 (Week 12), 1 hour Post-Dose
Group
Value
95% CI
BGS649 0.1 mg
1.43
1.24 – 1.65
BGS649 0.3 mg
4.39
3.89 – 4.97
BGS649 1.0 mg
14.91
13.52 – 16.45
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
0.85
0.72 – 1.00
BGS649 0.3 mg
2.97
2.20 – 4.00
BGS649 1.0 mg
10.04
8.23 – 12.25
Visit 8 (Week 24)/End of Treatment
Group
Value
95% CI
BGS649 0.1 mg
0.78
0.64 – 0.97
BGS649 0.3 mg
2.76
2.14 – 3.57
BGS649 1.0 mg
9.10
7.61 – 10.89
Descriptive Summary (Geometric Mean [95% CI]) of BGS649 Semen PK Concentration Values at 24 Weeks.Secondary· Week 24 and week 24/End of treatment
Semen PK sampling for BGS649 was performed at Visit 8 (End of Treatment). BGS649 PK semen concentrations were summarised for the PK population by descriptive statistics.
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
0.51
0.43 – 0.61
BGS649 0.3 mg
1.95
1.60 – 2.38
BGS649 1.0 mg
5.81
4.63 – 7.28
Visit 8 (Week 24)/End of Treatment
Group
Value
95% CI
BGS649 0.1 mg
0.49
0.42 – 0.58
BGS649 0.3 mg
1.58
1.19 – 2.08
BGS649 1.0 mg
5.28
4.16 – 6.71
Mean (SD) Change From Baseline in Prostate Specific Antigen (PSA) to Week 24.Secondary· Baseline, Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
PSA was measured alongside other clinical chemistry parameters at screening, baseline, Visits 1 through 8 and at follow-up.
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
0.045
± 0.1840
BGS649 0.3 mg
0.040
± 0.4830
BGS649 1.0 mg
0.011
± 0.4606
Placebo
0.015
± 0.2179
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
0.141
± 0.1742
BGS649 0.3 mg
0.082
± 0.5198
BGS649 1.0 mg
0.092
± 0.4338
Placebo
0.038
± 0.2700
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
0.166
± 0.2651
BGS649 0.3 mg
0.105
± 0.4747
BGS649 1.0 mg
0.132
± 0.3343
Placebo
0.055
± 0.4500
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
0.190
± 0.3895
BGS649 0.3 mg
0.271
± 0.9626
BGS649 1.0 mg
0.178
± 0.5405
Placebo
0.039
± 0.4382
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
0.147
± 0.2655
BGS649 0.3 mg
0.102
± 0.5500
BGS649 1.0 mg
0.160
± 0.4037
Placebo
0.016
± 0.2631
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
0.158
± 0.2913
BGS649 0.3 mg
0.480
± 2.6029
BGS649 1.0 mg
0.116
± 0.4560
Placebo
0.022
± 0.3942
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
0.218
± 0.4312
BGS649 0.3 mg
0.391
± 1.8627
BGS649 1.0 mg
0.085
± 0.2930
Placebo
0.067
± 0.4787
Mean (SD) Change From Baseline in Haematocrit to Week 24.Secondary· Day 8, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 20 weeks and 24 weeks
Haematocrit was measured alongside other haematology parameters at screening, baseline, Visits 1 through 8 and at follow-up.
Visit 2 (Day 8)
Group
Value
95% CI
BGS649 0.1 mg
-0.0003
± 0.02279
BGS649 0.3 mg
0.0014
± 0.01945
BGS649 1.0 mg
-0.0016
± 0.03487
Placebo
-0.0029
± 0.02374
Visit 3 (Week 4)
Group
Value
95% CI
BGS649 0.1 mg
0.0036
± 0.01855
BGS649 0.3 mg
0.0024
± 0.02095
BGS649 1.0 mg
0.0067
± 0.02997
Placebo
-0.0024
± 0.02539
Visit 4 (Week 8)
Group
Value
95% CI
BGS649 0.1 mg
0.0151
± 0.02153
BGS649 0.3 mg
0.0162
± 0.02709
BGS649 1.0 mg
0.0258
± 0.03233
Placebo
-0.0041
± 0.02383
Visit 5 (Week 12)
Group
Value
95% CI
BGS649 0.1 mg
0.0153
± 0.02419
BGS649 0.3 mg
0.0175
± 0.02270
BGS649 1.0 mg
0.0256
± 0.02906
Placebo
-0.0082
± 0.02882
Visit 6 (Week 16)
Group
Value
95% CI
BGS649 0.1 mg
0.0142
± 0.02195
BGS649 0.3 mg
0.0233
± 0.02408
BGS649 1.0 mg
0.0229
± 0.03260
Placebo
-0.0079
± 0.02533
Visit 7 (Week 20)
Group
Value
95% CI
BGS649 0.1 mg
0.0195
± 0.02545
BGS649 0.3 mg
0.0192
± 0.02672
BGS649 1.0 mg
0.0187
± 0.03222
Placebo
-0.0063
± 0.03037
Visit 8 (Week 24)
Group
Value
95% CI
BGS649 0.1 mg
0.0171
± 0.02612
BGS649 0.3 mg
0.0159
± 0.02621
BGS649 1.0 mg
0.0216
± 0.02587
Placebo
-0.0032
± 0.02884
Mean (SD) Change From Baseline in Dual Energy X-ray Absorptiometry (DEXA) Scan T-score by Location at Week 24.Secondary· Screening to Week 24
Summary of DEXA Scan T-score at Visit 8 (Week 24) in the hip, femoral neck, and lumber spine. DEXA T-score was calculated based on actual measured bone density value and compared to a standard reference range for healthy young adult men.
A bone density scan compares bone density with the bone density expected for a young healthy adult or a healthy adult of the same age, gender and ethnicity. The difference is calculated as a standard deviation (SD) score. The measures between the bone density and the expected value of a young healthy adult is known as the T score.
The World Health Organizati
Hip
Group
Value
95% CI
BGS649 0.1 mg
0.01
± 0.382
BGS649 0.3 mg
0.05
± 0.315
BGS649 1.0 mg
-0.02
± 0.323
Placebo
0.01
± 0.266
Femoral neck
Group
Value
95% CI
BGS649 0.1 mg
-0.16
± 0.337
BGS649 0.3 mg
0.02
± 0.441
BGS649 1.0 mg
-0.11
± 0.392
Placebo
0.03
± 0.212
Lumber spine
Group
Value
95% CI
BGS649 0.1 mg
-0.12
± 0.279
BGS649 0.3 mg
-0.08
± 0.381
BGS649 1.0 mg
-0.22
± 0.351
Placebo
0.07
± 0.346
Mean (SD) Change From Baseline in DEXA Scan Density by Location at Week 24Secondary· Screening to Week 24
Summary of DEXA scan density at Visit 8 (Week 24) in the hip, femoral neck, and lumber spine. Bone density was evaluated with standard procedure for Hologic and General Electric Lunar scanners.
Hip
Group
Value
95% CI
BGS649 0.1 mg
-0.0026
± 0.03990
BGS649 0.3 mg
-0.0020
± 0.03828
BGS649 1.0 mg
-0.0072
± 0.02724
Placebo
0.0005
± 0.03315
Femoral neck
Group
Value
95% CI
BGS649 0.1 mg
-0.0248
± 0.04583
BGS649 0.3 mg
-0.0044
± 0.06666
BGS649 1.0 mg
-0.0116
± 0.05139
Placebo
0.0028
± 0.02747
Lumber spine
Group
Value
95% CI
BGS649 0.1 mg
-0.0167
± 0.03174
BGS649 0.3 mg
-0.0177
± 0.05018
BGS649 1.0 mg
-0.0255
± 0.04044
Placebo
0.0100
± 0.04016
Adverse events — posted to ClinicalTrials.gov
Time frame: After randomisation and up to 90 days after the last administration of study drug..
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
BGS649 0.1 mg
Serious: 2/67 (3%)
Deaths: 0/67
BGS649 0.3 mg
Serious: 2/66 (3%)
Deaths: 0/66
BGS649 1.0 mg
Serious: 5/67 (7%)
Deaths: 0/67
Placebo
Serious: 5/71 (7%)
Deaths: 0/71
Serious adverse events (22 terms)
Reaction
System
BGS649 0.1 mg
BGS649 0.3 mg
BGS649 1.0 mg
Placebo
Postoperative wound infection
Infections and infestations
—
—
—
—
Arthritis infective
Infections and infestations
—
—
—
—
Diverticulitis
Infections and infestations
—
—
—
—
Osteomyelitis
Infections and infestations
—
—
—
—
Pneumonia
Infections and infestations
—
—
—
—
Pyelonephritis
Infections and infestations
—
—
—
—
Sepsis
Infections and infestations
—
—
—
—
Chest pain
General disorders
—
—
—
—
Multiple organ dysfunction syndrome
General disorders
—
—
—
—
Cardiac arrest
Cardiac disorders
—
—
—
—
Pericardial effusion
Cardiac disorders
—
—
—
—
Back pain
Musculoskeletal and connective tissue disorders
—
—
—
—
Gouty arthritis
Musculoskeletal and connective tissue disorders
—
—
—
—
Acute kidney injury
Renal and urinary disorders
—
—
—
—
Ureterolithiasis
Renal and urinary disorders
—
—
—
—
Anaemia
Blood and lymphatic system disorders
—
—
—
—
Intestinal perforation
Gastrointestinal disorders
—
—
—
—
Skull fracture
Injury, poisoning and procedural complications
—
—
—
—
Syncope
Nervous system disorders
—
—
—
—
Respiratory failure
Respiratory, thoracic and mediastinal disorders
—
—
—
—
Diabetic foot
Skin and subcutaneous tissue disorders
—
—
—
—
Hypertension
Vascular disorders
—
—
—
—
Other adverse events (201 terms — click to expand)
The purpose of this study is to evaluate the safety and efficacy of BGS649 in male obese subjects with hypogonadotropic hypogonadism. All subjects will be treated for a maximum of 24 weeks. Some subjects who complete 24 weeks of treatment will be invited to participate in a 6-month blinded safety extension study (Protocol MBGS206). The study is planned to enroll 268 subjects.
Publications & conference data
2 peer-reviewed publications reference this trial (live from Europe PMC):
NCT02908074 — A 6 Month Safety Extension Study of MBGS205
· Phase 2
· completed
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Mereo BioPharma
Last refreshed: 14 September 2022
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT02730169.